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WO2024235514A1 - Methods and apparatuses for updating measurement configuration - Google Patents

Methods and apparatuses for updating measurement configuration Download PDF

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Publication number
WO2024235514A1
WO2024235514A1 PCT/EP2024/058303 EP2024058303W WO2024235514A1 WO 2024235514 A1 WO2024235514 A1 WO 2024235514A1 EP 2024058303 W EP2024058303 W EP 2024058303W WO 2024235514 A1 WO2024235514 A1 WO 2024235514A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
measurement configuration
system information
indication
measurement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/058303
Other languages
French (fr)
Inventor
Jaewook Lee
Changhwan Lee
Taekyung Kim
Jin Jeong
Pradeepa Ramachandra
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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Publication of WO2024235514A1 publication Critical patent/WO2024235514A1/en
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • Embodiments of the represent disclosure relate to the field of telecommunication and in particular, to methods, devices, apparatuses and computer readable storage medium for updating a measurement configuration.
  • Background [0002] This section introduces aspects that may facilitate better understanding of the present disclosure. Accordingly, the statements of this section are to be read in this light and are not to be understood as admissions about what is in the prior art or what is not in the prior art.
  • Measurements can help a terminal device and a network make decisions so that resources can be managed better and ultimately quality of service is ensured.
  • the measurement for a terminal device may be configured according to clause 5 at 3rd generation partner project (3GPP) technical specification (TS) 38.331 V15.0.0 (published on 2018-01).
  • a network may configure the terminal device to perform measurements.
  • the network may also configure the terminal device to report them in accordance with the measurement configuration or perform conditional reconfiguration evaluation in accordance with the conditional reconfiguration.
  • the measurement configuration may be provided by means for dedicated signaling. Further, the measurement configuration needs to be updated in some situations. For example, if a cell is power off, a measurement configuration related to the cell may be changed. Therefore, how to properly update the measurement configuration is worth studying. Summary [0004] This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description.
  • a method implemented by a terminal device for communication is provided.
  • the terminal device may receive from a network device a first indication indicating system information to be changed.
  • the terminal device may also receive the system information indicated to be changed by the first indication from the network device via a broadcast signaling.
  • the system information may comprise a first measurement configuration.
  • the terminal device may update an existing measurement configuration based on the first measurement configuration. In this way, by receiving an indication on change of system information via broadcast signaling, it can reduce signaling cost in comparison to dedicated signaling, especially for the case that the same measurement configuration update is for multiple terminal devices.
  • the first indication may be received from a serving cell of the terminal device, and the first measurement configuration may be used for measuring one or more cells.
  • the terminal device may be in a radio resource control connected state. Traditionally, measurement configuration update may usually be informed via dedicated signaling to terminal devices in a radio resource control connected state.
  • the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state.
  • SIBs system information blocks
  • the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state.
  • the existing SIB can be reused.
  • the terminal device may receive the first measurement configuration upon receiving the first indication indicating the system information to be changed.
  • the terminal device may receive the first indication indicating the system information to be changed in a modification period. The terminal device may also receive the system information comprising the first measurement configuration in a subsequent modification period.
  • the terminal device may receive a second measurement configuration via a dedicated signaling in the modification period. The terminal device may skip receiving the system information in the subsequent modification period. [0014] In an embodiment, the terminal device may monitor the first indication indicating the system information to be changed in at least one paging occasion per modification period. [0015] In an embodiment, if the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state, the terminal device may remove the first measurement configuration. In an embodiment, if the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state that is configured with measurement during the radio resource control release procedure, the terminal device may continue to apply the first measurement configuration.
  • the terminal device may be in a radio resource control idle state or in inactive state.
  • the terminal device may be configured with a SSB measurement during a radio resource control release procedure.
  • the system information may further indicate a validity area for the first measurement configuration. In this case, if the terminal device enters a cell that does not belong to the validity area, the terminal device may remove the first measurement configuration. In this way, it can reduce effort of readying SIBs and save power.
  • the system information may further indicate expiry time for the first measurement configuration. In this case, if the expiry time is elapsed, the terminal device may remove the first measurement configuration. In this way, it can avoid applying the first measurement configuration in a changed cell situation.
  • the expiry time may be indicated by one of: absolute time or a time duration.
  • the terminal device may start a validity timer with the expiry time upon the reception of the system information.
  • the terminal device may be configured with a maximum duration for reading the system information that comprises the first measurement configuration. In this case, the terminal device may start a timer associated with reading the system information upon the reception of the first indication. Alternatively, the terminal device may start a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs.
  • the terminal device may transmit, to the network device, feedback information indicating whether the first measurement configuration is successfully applied. In this way, the network device can know whether the first measurement configuration is successfully applied.
  • the first indication may be a SIB modification indication transmitted in a paging message or downlink control information.
  • the terminal device may receive, from the network device, a second indication for releasing the first measurement configuration and releases the first measurement configuration based on the second indication. In this way, the network can determine to release the first measurement configuration based on the cell situation.
  • the terminal device may transmit, to the network device, feedback information indicating whether the first measurement configuration is successfully applied.
  • updating the existing measurement configuration may comprise at least one of: an addition or removal of a cell from a list of excluded cells, stopping a timer that is running associated with the cell, or an addition or removal of the cell to a conditional handover related configuration.
  • the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells.
  • the network device may transmit, to at least one a terminal device, a first indication indicating system information to be changed.
  • the network device may transmit the system information indicated to be changed by the first indication to the at least one terminal device via a broadcast signaling.
  • the system information may comprise a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. In this way, by transmitting an indication on change of system information via broadcast signaling, it can reduce signaling cost in comparison to dedicated signaling, especially for the case that the same measurement configuration update is for multiple terminal devices.
  • the at least one terminal device comprises one terminal device or a plurality of terminal devices.
  • the first indication may be transmitted in a serving cell of the terminal device, and the first measurement configuration may be used for one or more cells.
  • the at least one terminal device may be in a radio resource control connected state.
  • measurement configuration update may usually be informed via dedicated signaling to terminal devices in a radio resource control connected state.
  • signaling cost can be reduced significantly via broadcast in comparison to dedicated signaling for every terminal device.
  • the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state.
  • the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state.
  • the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. In this way, the existing SIB can be reused.
  • the network device may transmit the first indication indicating the system information to be changed in a modification period. In an embodiment, the network device may transmit the system information comprising the first measurement configuration in a subsequent modification period. [0035] In an embodiment, the network device may transmit to the at least one terminal device, a second measurement configuration via a dedicated signaling in the modification period. [0036] In an embodiment, the network device may transmit to the at least one terminal device, the first indication indicating the system information to be changed in at least one paging occasion per modification period.
  • the at least one terminal device is a radio resource control idle state or in inactive state; and the at least one terminal device is configured with a synchronization signal block (SSB) measurement during a radio resource control release procedure.
  • the system information may further indicate a validity area for the first measurement configuration. In this way, it can reduce effort of readying SIBs and save power.
  • the system information may further indicate expiry time for the first measurement configuration. In this way, it can avoid applying the first measurement configuration in a changed cell situation.
  • the expiry time may be indicated by one of: absolute time or a time duration.
  • the first indication may be a SIB modification indication transmitted in a paging message or downlink control information.
  • the network device may receive from the at least one terminal device, feedback information indicating whether the first measurement configuration is successfully applied. In this way, the network device can know whether the first measurement configuration is successfully applied.
  • the network device may transmit to the at least one terminal device, a second indication for releasing the first measurement configuration. In this way, the network device can determine to release the first measurement configuration based on the cell situation.
  • the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells.
  • a terminal device may comprise: a processor and a memory, said memory containing instructions executable by said processor whereby said terminal device is operative to perform receiving, from a network device, a first indication indicating system information to be changed.
  • the terminal device may be also operative to perform receiving, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication.
  • the system information may comprise a first measurement configuration.
  • the terminal device may further be operative to perform updating an existing measurement configuration based on the first measurement configuration.
  • a network device may comprise: a processor and a memory, said memory containing instructions executable by said processor whereby said network device is operative to perform transmitting, to at least one terminal device, a first indication indicating system information to be changed.
  • the network device may be operative to perform transmitting, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication.
  • the system information may comprise a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device.
  • a method implemented in a communication system including a terminal device and a network device.
  • the method may comprise steps of the method according to the above first and second aspect.
  • a communication system including a terminal device according to the above third aspect and a network device according to the above fourth aspect.
  • a computer program product is provided.
  • the computer program product may comprise instructions, which, when executed on at least one processor, cause the at least one processor to carry out the method above, as performed by the terminal device or the network device, respectively.
  • an apparatus may comprise a transceiver module that is configured to receive, from a network device, a first indication indicating system information to be changed.
  • the transceiver module is also configured to receive, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication.
  • the system information may comprise a first measurement configuration.
  • the apparatus may also comprise a processing module that is configured to update an existing measurement configuration based on the first measurement configuration.
  • an apparatus is provided.
  • the apparatus may comprise a transceiver module that is configured to transmit, to at least one terminal device, a first indication indicating system information to be changed.
  • the transceiver module may also be configured to transmit, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication.
  • the system information may comprise a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device.
  • FIG. 3 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments;
  • FIG. 4 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments;
  • FIG. 5 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments;
  • FIG. 6 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments;
  • FIG. 7 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments;
  • FIG. 8 is a flowchart of a method implemented by a terminal device in accordance with an embodiment of the present disclosure; [0061] FIG.
  • FIG. 9 is a flowchart of a method implemented by a network device in accordance with an embodiment of the present disclosure.
  • FIG. 10 is a flowchart of a method implemented by a network device in accordance with an embodiment of the present disclosure;
  • FIG.11 is a block diagram showing an apparatus suitable for use in practicing some embodiments of the present disclosure;
  • FIG. 12A shows a block diagram showing a terminal device suitable for use in practicing some embodiments of the present disclosure and
  • FIG.12B shows a block diagram showing a network device suitable for use in practicing some embodiments of the present disclosure; [0065] FIG.
  • FIG. 13 shows an example of a communication system in accordance with some embodiments;
  • FIG.14 shows a block diagram of a host in accordance with some embodiments; and
  • FIG.15 shows a communication diagram of a host communicating via a network node with a user equipment (UE) over a partially wireless connection in accordance with some embodiments.
  • UE user equipment
  • FIG.15 shows a communication diagram of a host communicating via a network node with a user equipment (UE) over a partially wireless connection in accordance with some embodiments.
  • UE user equipment
  • terminal device may be any device intended for accessing services via an access network and configured to communicate over the access network.
  • the terminal device/communication device may be, but is not limited to: mobile phone, smart phone, sensor device, meter, vehicle, household appliance, medical appliance, media player, camera, or any type of consumer electronic, for instance, but not limited to, television, radio, lighting arrangement, tablet computer, laptop, or PC.
  • the terminal device/communication device may be a portable, pocket storable, hand- held, computer-comprised, or vehicle-mounted mobile device, enabled to communicate voice and/or data, via a wireless or wireline connection.
  • the term “terminal device” may be referred to as a mobile station (MT).
  • MT mobile station
  • UE user equipment
  • the terms “terminal device” and “UE” can be used interchangeable hereinafter.
  • the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom.
  • the network device may refer to a base station (BS) or an access point (AP), for example, a node B (NodeB or Konaktiebolaget LM Ericsson (publ) - 12 - 30A-162143 NB), an evolved NodeB (eNodeB or eNB), an NR NB (also referred to as a gNB), a Remote Radio Unit (RRU), a radio header (RH), a remote radio head (RRH), a relay, an Integrated Access and Backhaul (IAB) node, a low power node such as a femto, a pico, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device,
  • RRC connected state or “RRC connected mode” used herein may refer to a state in which service radio bearer and data radio bearer are allocated for the terminal device.
  • RRC idle state or “RRC idle mode” used herein may refer to a state where the terminal device is switched on but does not have any established RRC connection.
  • RRC inactive state or “RRC inactive mode” used herein may refer to a state where there is an RRC connection that has been suspended.
  • Each RRC states herein follows the definition described in clause 4.2.1 at 3GPP TS 38.331 V15.0. (published on 2018-01).
  • broadcast signaling may refer to a signaling that is transmitted on a broadcast channel (BCH).
  • RRC connected UE or “RRC connected terminal device” used herein may refer to a UE or terminal device that is in the RRC connected state.
  • RRC inactive UE or “RRC inactive terminal device” used herein may refer to a UE or terminal device that is in the RRC inactive state.
  • RRC idle UE or “RRC idle terminal device” used herein may refer to a UE or terminal device that is in the RRC idle state.
  • a network device could broadcast a ‘cell barring’ in system information or a master information block (MIB) message.
  • MIB master information block
  • the term “cell barring” means to bar or block a cell.
  • the MIB message may include system information transmitted on a broadcast channel.
  • the terminal device may reselect to another cell.
  • a terminal device in the RRC connected state or RRC connected mode would be moved by handover mechanism if there is ongoing transmission/reception.
  • a RRC connected terminal device in a neighbor cell of a cell in a locking process would report measurement reports for the cell.
  • the RRC connected terminal device may not be moved to the cell in the locking process by the network, even though the RRC connected terminal device reports that the cell in the locking process is good enough in term of reference signal receive power (RSRP)/ signal to interference plus noise ratio (SINR).
  • RSRP reference signal receive power
  • SINR signal to interference plus noise ratio
  • the cell could not be added as Secondary cell (SCell) for carrier aggregation (CA)/dual connectivity (DC) or Primary secondary cell (PSCell) for DC as the cell will be shut down.
  • SCell Secondary cell
  • CA carrier aggregation
  • DC dual connectivity
  • PSCell Primary secondary cell
  • the RRC connected terminal device would continuously report the measurement report for the cell in the locking process, unless the measurement for the cell in the locking process is de-configured by adding the cell into an information element “excludedCellsToAddModList”.
  • the term “excludedCellsToAddModList” used herein may refer to an information element (IE) that indicates a list of cells to add or modify in a list of exclude-listed cells.
  • the list of exclude-listed cells may not be applicable or may not be considered in an event evaluation or measurement report. This would waste radio resources.
  • the network device wants to configure the cell in the locking process in the excludedCellsToAddModList to many RRC connected terminal devices, it puts burden to a baseband and wastes lots of radio resources.
  • FIG.1 illustrates a communication system 100 in which embodiments of the present disclosure can be implemented.
  • the communication system 100 includes a network device 120.
  • the communication system 100 also includes a terminal device 110- 1, a terminal device 110-2, ...
  • a terminal device 110-N (collectively referred to as “terminal device(s) 110”), where N is an integer number.
  • the terminal device 110 is currently served by a cell 101.
  • cells 102 and 103 are neighbor cells of the cell 101.
  • Konimiebolaget LM Ericsson (publ) - 14 - 30A-162143 [0082] It can be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation.
  • the communication system 100 may include any suitable number of devices configured to implementing embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional terminal devices may be located in the cell 101, and one or more additional cells may be deployed in the communication system 100.
  • a channel from the network device 120 to the terminal device 110 is referred to as a downlink (DL), while a channel from the terminal device 110 to the network device 120 is referred to as an uplink (UL).
  • the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver).
  • the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver).
  • Communications in the communication system 100 may be implemented according to any proper communication protocol(s), comprising, but not limited to, cellular communication protocols of the first generation (1G), the second generation (2G), the third generation (3G), the fourth generation (4G), the fifth generation (5G), the sixth generation (6G), and the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • IEEE Institute for Electrical and Electronics Engineers
  • the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Frequency Division Duplex (FDD), Time Division Duplex (TDD), Multiple-Input Multiple-Output (MIMO), Orthogonal Frequency Division Multiple (OFDM), Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and/or any other technologies currently known or to be developed in the future.
  • CDMA Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • MIMO Multiple-Input Multiple-Output
  • OFDM Orthogonal Frequency Division Multiple
  • DFT-s-OFDM Discrete Fourier Transform spread OFDM
  • the network device 120 may configure the terminal device 110 to report the measurement in accordance with a measurement configuration or perform a conditional reconfiguration evaluation in accordance with a conditional reconfiguration.
  • the measurement configuration is provided by means of a dedicated signaling, i.e., using a RRC reconfiguration message or a RRC resume message.
  • a network may configure a UE to perform the following types of measurements: - NR measurements; - Inter-radio access technology (RAT) measurements of evolved-universal terrestrial radio access (E-UTRA) frequencies. - Inter-RAT measurements of universal terrestrial radio access-frequency division duplex (UTRA-FDD) frequencies.
  • RAT Inter-radio access technology
  • UTRA-FDD universal terrestrial radio access-frequency division duplex
  • the network may configure the UE to report the following measurement information based on synchronization signal/physical broadcast channel (SS/PBCH) block(s): - Measurement results per SS/PBCH block; - Measurement results per cell based on SS/PBCH block(s); - SS/PBCH block(s) indexes.
  • the network may configure the UE to report the following measurement information based on channel state information-reference signal (CSI-RS) resources: - Measurement results per CSI-RS resource; - Measurement results per cell based on CSI-RS resource(s); - CSI-RS resource measurement identifiers.
  • CSI-RS channel state information-reference signal
  • the network may configure the UE to perform the following types of measurements for NR sidelink and vehicle to everything (V2X) sidelink: - Channel busy ratio (CBR) measurements.
  • the network may configure the UE to report the following cross link interference (CLI) measurement information based on SRS resources: - Measurement results per SRS resource; - Sounding reference signal (SRS) resource(s) indexes.
  • CRS cross link interference
  • the network may configure the UE to report the following CLI measurement information based on CLI- received signal strength indication (RSSI) resources: - Measurement results per CLI-RSSI resource; - CLI-RSSI resource(s) indexes.
  • the measurement configuration includes the following parameters: 1. Measurement objects: A list of objects on which the UE shall perform the measurements.
  • a measurement object indicates the frequency/time location and subcarrier spacing of reference signals to Konaktiebolaget LM Ericsson (publ) - 16 - 30A-162143 be measured.
  • the network may configure a list of cell specific offsets, a list of 'excludedlisted' cells and a list of 'whitelisted' cells. Excludedlisted cells are not applicable in event evaluation or measurement reporting. Whitelisted cells are the only ones applicable in event evaluation or measurement reporting.
  • the measObjectId of the measurement object (MO) which corresponds to each serving cell is indicated by servingCellMO within the serving cell configuration.
  • a measurement object is a single E-UTRA carrier frequency. Associated with this E-UTRA carrier frequency, the network can configure a list of cell specific offsets and a list of 'excludedlisted' cells. Excludedlisted cells are not applicable in event evaluation or measurement reporting.
  • a measurement object is a set of cells on a single UTRA-FDD carrier frequency.
  • a measurement object is a set of transmission resource pool(s) on a single carrier frequency for NR sidelink communication.
  • a measurement object indicates the frequency/time location of SRS resources and/or CLI-RSSI resources, and subcarrier spacing of SRS resources to be measured.
  • Reporting configurations A list of reporting configurations where there can be one or multiple reporting configurations per measurement object. Each measurement reporting configuration consists of the following: - Reporting criterion: The criterion that triggers the UE to send a measurement report. This can either be periodical or a single event description.
  • - Reference signal (RS) type The RS that the UE uses for beam and cell measurement results (SS/PBCH block or CSI-RS).
  • - Reporting format The quantities per cell and per beam that the UE includes in the measurement report (e.g.
  • each configuration consists of the following: - Execution criteria: The criteria the UE uses for conditional reconfiguration execution.
  • - RS type The RS that the UE uses for obtaining beam and cell measurement results (SS/PBCH block-based or CSI-RS-based), used for evaluating conditional reconfiguration execution condition.
  • Measurement identities For measurement reporting, a list of measurement identities where each measurement identity links one measurement object with one reporting configuration. By configuring multiple measurement identities, it is possible to link more than one measurement object to the same reporting configuration, as well as to link more than one reporting configuration to the same measurement object.
  • the measurement identity is also included in the measurement report that Wegiebolaget LM Ericsson (publ) - 17 - 30A-162143 triggered the reporting, serving as a reference to the network.
  • one measurement identity links to exactly one conditional reconfiguration trigger configuration.
  • up to 2 measurement identities can be linked to one conditional reconfiguration execution condition.
  • Quantity configurations The quantity configuration defines the measurement filtering configuration used for all event evaluation and related reporting, and for periodical reporting of that measurement.
  • the network may configure up to 2 quantity configurations with a reference in the NR measurement object to the configuration that is to be used. In each configuration, different filter coefficients can be configured for different measurement quantities, for different RS types, and for measurements per cell and per beam. 5.
  • Measurement gaps Periods that the UE may use to perform measurements.
  • a UE in a RRC_connected state maintains a measurement object list, a reporting configuration list, and a measurement identities list according to signalling and procedures in this specification.
  • the measurement object list possibly includes NR measurement object(s), CLI measurement object(s) and inter-RAT objects.
  • the reporting configuration list includes NR and inter-RAT reporting configurations. Any measurement object can be linked to any reporting configuration of the same RAT type. Some reporting configurations may not be linked to a measurement object. Likewise, some measurement objects may not be linked to a reporting configuration.
  • the measurement procedures distinguish the following types of cells: 1.
  • Listed cells – these are cells listed within the measurement object(s). 3. Detected cells – these are cells that are not listed within the measurement object(s) but are detected by the UE on the SSB frequency(ies) and subcarrier spacing(s) indicated by the measurement object(s). For NR measurement object(s), the UE measures and reports on the serving cell(s), listed cells and/or detected cells. For inter-RAT measurements object(s) of E-UTRA, the UE measures and reports on listed cells and detected cells and, for RSSI and channel occupancy measurements, the UE measures and reports on the configured resources on the indicated frequency. For inter-RAT measurements object(s) of UTRA-FDD, the UE measures and reports on listed cells.
  • the UE measures and reports on configured measurement resources (i.e. SRS resources and/or CLI-RSSI resources).
  • configured measurement resources i.e. SRS resources and/or CLI-RSSI resources.
  • the UE may receive two independent measConfig: - a measConfig, associated with master cell group (MCG), that is included in the RRCReconfiguration message received via signaling radio bearer (SRB)1; and - a measConfig, associated with secondary cell group (SCG), that is included in the RRCReconfiguration message received via SRB3, or, alternatively, included within a Konaktiebolaget LM Ericsson (publ) - 18 - 30A-162143 RRCReconfiguration message embedded in a RRCReconfiguration message received via SRB1.
  • MCG master cell group
  • SRB signaling radio bearer
  • SCG secondary cell group
  • the UE maintains two independent VarMeasConfig and VarMeasReportList, one associated with each measConfig, and independently performs all the procedures in clause 5.5 for each measConfig and the associated VarMeasConfig and VarMeasReportList, unless explicitly stated otherwise.
  • the configurations related to CBR measurements are only included in the measConfig associated with MCG.
  • ASN.1 of the measurement configuration via dedicated signalling is like below. 2.1.1.1 – MeasConfig
  • the IE MeasConfig specifies measurements to be performed by the UE, and covers intra- frequency, inter-frequency and inter-RAT mobility as well as configuration of measurement gaps.
  • MeasConfig information element -- ASN1START -- TAG-MEASCONFIG-START MeasConfig :: SEQUENCE ⁇ measObjectToRemoveList MeasObjectToRemoveList OPTIONAL, -- Need N measObjectToAddModList MeasObjectToAddModList OPTIONAL, -- Need N reportConfigToRemoveList ReportConfigToRemoveList OPTIONAL, -- Need N reportConfigToAddModList ReportConfigToAddModList OPTIONAL, -- Need N measIdToRemoveList MeasIdToRemoveList OPTIONAL, -- Need N measIdToAddModList MeasIdToAddModList OPTIONAL, -- Need N s-MeasureConfig CHOICE ⁇ ssb-RSRP RSRP-Range, csi-RSRP RSRP-Range ⁇ OPTIONAL, -- Need M quantityConfig QuantityConfig OPTIONAL, -- Need M measGapConfig
  • UE is configured to perform SSB based inter-frequency measurement without measurement gaps when the inter-frequency SSB is completely contained in the active downlink (DL) bandwidth part (BWP) of the UE, as specified in TS 38.133 [14], clause 9.3. Otherwise, the SSB based inter-frequency measurement is performed within measurement gaps.
  • the field can only be configured in the measConfig associated with MCG, and when configured, it applies to all the inter-frequency measurements configured by MN and SN.
  • measGapConfig Used to setup and release measurement gaps in NR.
  • measIdToAddModList List of measurement identities to add and/or modify.
  • measIdToRemoveList List of measurement identities to remove.
  • measObjectToAddModList List of measurement objects to add and/or modify.
  • measObjectToRemoveList List of measurement objects to remove.
  • the network device 120 may broadcast system information to the terminal device 110.
  • the system information can be broadcasted to a group of terminal devices.
  • related contents from clause 5.2 at 3GPP TS 38.331 V15.0.0 (published on 2018-01) are as follows.
  • SI System Information
  • - the MIB is always transmitted on the BCH with a periodicity of 80 ms and repetitions made within 80 ms (TS 38.212 [17], clause 7.1) and it includes parameters that are needed to acquire SIB1 from the cell.
  • the first transmission of the MIB is scheduled in subframes as defined in TS 38.213 [13], clause 4.1 and repetitions are scheduled according to the period of SSB;
  • - the SIB1 is transmitted on the downlink shared channel (DL-SCH) with a periodicity of 160 ms and variable transmission repetition periodicity within 160 ms as specified in TS 38.213 [13], clause 13.
  • DL-SCH downlink shared channel
  • SIB1 The default transmission repetition periodicity of SIB1 is 20 ms but the actual transmission repetition periodicity is up to network Konaktiebolaget LM Ericsson (publ) - 21 - 30A-162143 implementation.
  • SIB1 repetition transmission period is 20 ms.
  • SIB1 transmission repetition period is the same as the SSB period (TS 38.213 [13], clause 13).
  • SIB1 includes information regarding the availability and scheduling (e.g.
  • SIB1 is cell-specific SIB; - SIBs other than SIB1 and posSIBs are carried in SystemInformation (SI) messages, which are transmitted on the DL-SCH. Only SIBs or posSIBs having the same periodicity can be mapped to the same SI message. SIBs and posSIBs are mapped to the different SI messages. Each SI message is transmitted within periodically occurring time domain windows (referred to as SI-windows with same length for all SI messages).
  • Each SI message is associated with an SI-window and the SI-windows of different SI messages do not overlap. That is, within one SI-window only the corresponding SI message is transmitted. An SI message may be transmitted a number of times within the SI-window.
  • Any SIB or posSIB except SIB1 can be configured to be cell specific or area specific, using an indication in SIB1.
  • the cell specific SIB is applicable only within a cell that provides the SIB while the area specific SIB is applicable within an area referred to as SI area, which consists of one or several cells and is identified by systemInformationAreaID; -
  • the mapping of SIBs to SI messages is configured in schedulingInfoList, while the mapping of posSIBs to SI messages is configured in posSchedulingInfoList.
  • Each SIB is contained only in a single SI message.
  • a posSIB carrying global navigation satellite system (GNSS) Generic Assistance Data for different GNSS/satellite based augmentation system (SBAS) [49] is contained in different SI messages.
  • GNSS global navigation satellite system
  • SBAS short term based augmentation system
  • Each SIB and posSIB, including a posSIB carrying GNSS Generic Assistance Data for one GNSS/SBAS is contained at most once in that SI message; -
  • the network can provide system information through dedicated signalling using the RRCReconfiguration message, e.g. if the UE has an active BWP with no common search space configured to monitor system information, paging, or upon request from the UE.
  • the network provides the required SI by dedicated signalling, i.e. within an RRCReconfiguration message. Nevertheless, the UE shall acquire MIB of the PSCell to get SFN timing of the SCG (which may be different from MCG). Upon change of relevant SI for SCell, the network releases and adds the concerned SCell. For PSCell, the required SI can only be changed with Reconfiguration with Sync. NOTE: The physical layer imposes a limit to the maximum size a SIB can take. The maximum SIB1 or SI message size is 2976 bits. 5.2.2 System information acquisition 5.2.2.1 General UE requirements The UE applies the SI acquisition procedure to acquire the access stratum (AS), non-access stratum (NAS)- and positioning assistance data information.
  • AS access stratum
  • NAS non-access stratum
  • the procedure applies to UEs in RRC_idle, in RRC_inactive and in RRC_connected.
  • the UE in RRC_idle and RRC_inactive shall ensure having a valid version of (at least) the MIB, SIB1 through SIB4, SIB5 (if the UE supports E-UTRA), SIB11 (if the UE is configured for idle/inactive measurements), SIB12 (if UE is capable of NR sidelink communication and is configured by upper layers to receive or transmit NR sidelink communication), and SIB13, SIB14 (if UE is capable of V2X sidelink communication and is configured by upper layers to receive or transmit V2X sidelink communication).
  • the UE shall ensure having a valid version of the posSIB requested by upper layers. 5.2.2.2 SIB validity and need to (re)-acquire SIB 5.2.2.2.1 SIB validity
  • the UE shall apply the SI acquisition procedure as defined in clause 5.2.2.3 upon cell selection (e.g. upon power on), cell-reselection, return from out of coverage, after reconfiguration with sync completion, after entering the network from another RAT, upon receiving an indication that the system information has changed, upon receiving a PWS notification, upon receiving request (e.g., a positioning request) from upper layers; and whenever the UE does not have a valid version of a stored SIB or posSIB or a valid version of a requested SIB.
  • the UE When the UE acquires a MIB or a SIB1 or an SI message in a serving cell as described in clause 5.2.2.3, and if the UE stores the acquired SIB, then the UE shall store the associated areaScope, if present, the first public land mobile network (PLMN)-Identity in the PLMN- IdentityInfoList for non-NPN-only cells or the first non-public network (NPN) identity (standalone NPN (SNPN) identity in case of SNPN, or Public Network Integrated NPN (PNI-NPN) identity in case of PNI-NPN) in the NPN-IdentityInfoList for NPN-only cells, the cellIdentity, the systemInformationAreaID, if present, and the valueTag, if present, as indicated in the si-SchedulingInfo for the SIB.
  • PLMN public land mobile network
  • NPN standalone NPN
  • PNI-NPN Public Network Integrated NPN
  • the UE shall store the associated areaScope, if present, the cellIdentity, the systemInformationAreaID, if present, the valueTag, if provided in assistanceDataSIB- Element, and the expirationTime if provided in assistanceDataSIB-Element.
  • the UE may use a valid stored version of the SI except MIB, SIB1, SIB6, SIB7 or SIB8 e.g. after cell re- selection, upon return from out of coverage or after the reception of SI change indication.
  • the valueTag and expirationTime for posSIB is optionally provided in assistanceDataSIB- Element, as specified in TS 37.355.
  • the storage and management of the stored SIBs in addition to the SIBs valid for the current serving cell is left to UE implementation.
  • the UE shall: 1>delete any stored version of a SIB after 3 hours from the moment it was successfully confirmed as valid; 1>for each stored version of a SIB: 2>if the areaScope is associated and its value for the stored version of the SIB is the same as the value received in the si-SchedulingInfo for that SIB from the serving cell: 3> if the UE is NPN capable and the cell is an NPN-only cell: 4> if the first NPN identity included in the NPN-IdentityInfoList, the systemInformationAreaID and the valueTag that are included in the si- Konaktiebolaget LM Ericsson (publ) - 23 - 30A-162143 SchedulingInfo for the SIB received from the serving cell are identical to the NPN identity, the systemInformationAreaID and the valueTag associated with the stored version of that SIB: 5> consider the stored
  • SI message (other than SI message for earthquake & tsunami warning system (ETWS), commercial mobile alter system (CMAS) and positioning assistance data) is broadcasted in the modification period following the one where SI change indication is transmitted.
  • the modification period is configured by system information.
  • the UE receives indications about SI modifications and/or PWS notifications using Short Message transmitted with paging radio network temporary identifier (P-RNTI) over downlink control information (DCI) (see clause 6.5). Repetitions of SI change indication may occur within preceding modification period. SI change indication is not applicable for SI messages containing posSIBs.
  • UEs in RRC_idle or in RRC_inactive shall monitor for SI change indication in its own paging occasion every discontinuous reception transmission (DRX) cycle.
  • UEs in RRC_connected shall monitor for SI change indication in any paging occasion at least once per modification period if the UE is provided with common search space, including pagingSearchSpace, searchSpaceSIB1 and searchSpaceOtherSystemInformation, on the active BWP to monitor paging, as specified in TS 38.213 [13], clause 13.
  • the SI messages carrying the posSIBs scheduled in posSchedulingInfoList may change, so the UE might not be able to successfully receive those posSIBs in the remainder of the current modification period and next modification period according to the scheduling information received prior to the change.
  • ETWS or CMAS capable UEs in RRC_idle or in RRC_inactive shall monitor for indications about PWS notification in its own paging occasion every DRX cycle.
  • ETWS or CMAS capable UEs in RRC_connected shall monitor for indication about PWS notification in any paging occasion at least once every defaultPagingCycle if the UE is provided with common search space, including pagingSearchSpace, searchSpaceSIB1 and searchSpaceOtherSystemInformation, on the active BWP to monitor paging.
  • the UE monitors the physical downlink control channel (PDCCH) monitoring occasion(s) for paging as specified in TS 38.304 [20] and TS 38.213 [13].
  • PDCCH physical downlink control channel
  • the UE shall: 1> if the UE is ETWS capable or CMAS capable, the etwsAndCmasIndication bit of Short Message is set, and the UE is provided with searchSpaceSIB1 and searchSpaceOtherSystemInformation on the active BWP or the initial BWP: 2> immediately re-acquire the SIB1; 2>if the UE is ETWS capable and si-SchedulingInfo includes scheduling information for SIB6: 3>acquire SIB6, as specified in sub-clause 5.2.2.3.2, immediately; Konaktiebolaget LM Ericsson (publ) - 25 - 30A-162143 2>if the UE is ETWS capable and si-SchedulingInfo includes scheduling information for SIB7: 3>acquire SIB7, as specified in sub-clause 5.2.2.3.2, immediately; 2> if the UE is CMAS capable and si-SchedulingInfo includes scheduling information for SIB8: 3
  • the UE shall: 1>apply the specified BCCH configuration defined in 9.1.1.1; 1>if the UE is in RRC_idle or in RRC_inactive; or 1>if the UE is in RRC_connected while T311 is running: 2>acquire the MIB, which is scheduled as specified in TS 38.213 [13]; 2> if the UE is unable to acquire the MIB; 3>perform the actions as specified in clause 5.2.2.5; 2>else: 3>perform the actions specified in clause 5.2.2.4.1.
  • searchSpaceOtherSystemInformation is set to zero, PDCCH monitoring occasions for SI message reception in SI-window are same as PDCCH monitoring occasions for SIB1 where the mapping between PDCCH monitoring occasions and SSBs is specified in TS 38.213[13]. If searchSpaceOtherSystemInformation is not set to zero, PDCCH monitoring occasions for SI message are determined based on search space indicated by searchSpaceOtherSystemInformation. PDCCH monitoring occasions for SI message which are not overlapping with UL symbols (determined according to tdd-UL- DL-ConfigurationCommon) are sequentially numbered from one in the SI window.
  • the actual transmitted SSBs are sequentially numbered from one in ascending order of their SSB indexes.
  • the UE assumes that, in the SI window, PDCCH for an SI message is transmitted in at least one PDCCH monitoring occasion corresponding to each transmitted SSB and thus the selection of SSB for the reception SI messages is up to UE implementation.
  • SI-RNTI in the PDCCH monitoring occasion(s) for SI message acquisition from the start of the SI-window and continue until the end of the SI-window whose absolute length in time is given by si-WindowLength, or until the SI message was received; 1>if the SI message was not received by the end of the SI-window, repeat reception at the next SI-window occasion for the concerned SI message in the current modification period; NOTE 1: The UE is only required to acquire broadcasted SI message if the UE can acquire it without disrupting unicast data reception, i.e. the broadcast and unicast beams are quasi co-located.
  • a UE capable of NR sidelink communication and configured by upper layers to perform NR sidelink communication on a frequency may acquire SIB12 from a cell other than current serving cell (for RRC_inactive or RRC_idle) or current PCell (for RRC_connected), if SIB12 of current serving cell (for RRC_inactive or RRC_idle) or current PCell (for RRC_conncted) does not provide configuration for NR sidelink communication for the frequency, and if the other cell providing configuration for NR sidelink communication for the frequency meets the S-criteria as defined in TS 38.304 [20] and TS 36.304 [27]. 1> perform the actions for the acquired SI message as specified in sub-clause 5.2.2.4.
  • the signaling chart 200 involves a terminal device 210 and a network device 220.
  • the terminal device 210 may be implemented at the terminal device 110 or may be the terminal device 110.
  • the network device 220 may be implemented at the network device 120 or may be the network device 120.
  • the terminal device 210 and the network device 220 may perform (2010) a RRC connection establishment procedure. For example, during the RRC connection establishment procedure, the terminal device 210 may transmit a RRC connection request to the network device 220.
  • the RRC connection request may include a terminal device identity of the terminal device 210.
  • the terminal device 210 may start a timer (i.e., T300 timer) after transmitting the RRC connection request.
  • the network device 220 may transmit a RRC connection setup message to the terminal device 210.
  • the RRC connection setup message may include configuration information for a SRB.
  • the RRC connection setup message may also include configuration information for physical layer channels.
  • the terminal device 210 may stop the timer and make a transition to the RRC connected state.
  • the network device 220 may transmit (2020) a measurement configuration to the terminal device 210.
  • the measurement configuration may be transmitted in a Konaktiebolaget LM Ericsson (publ) - 29 - 30A-162143 RRC reconfiguration message. Detailed contents in the measurement configuration are described above, for example, according to clause 5.5 at 3GPP TS 38.331 V15.0.0 (published on 2018-01).
  • the terminal device 210 may transmit (2030) a RRC reconfiguration complete message to the network device 220.
  • the network device 220 may determine (2040) that the measurement configuration needs to be updated. For example, if a cell is shut down, the network device 220 may determine that the measurement configuration needs to be updated to remove the cell from the measurement cell list.
  • the network device 220 may determine that the measurement configuration needs to be updated.
  • the network device 220 transmits (2050) an indication (referred to as “first indication”) to at least one terminal device, for example, the terminal device 210.
  • the first indication indicates that the system information is to be changed.
  • the first indication may be transmitted to the terminal device 110-1 shown in FIG. 1.
  • the first indication may be transmitted to the terminal devices 110-1 and 110-2 shown in FIG.1.
  • the at least one terminal device may include any suitable number of terminal devices, for example, only one terminal device or more than one terminal device.
  • the first indication may be received from the cell 101 that is the serving cell of the terminal device 220.
  • the terminal device 210 receives the first information from the network device 120.
  • the terminal device 210 may monitor a physical layer channel (for example, a physical downlink control channel (PDCCH)) with a paging radio network temporary identifier (P-RNTI) to acquire the first indication.
  • the first indication may be transmitted in downlink control information (DCI).
  • the first indication may be transmitted in a paging message.
  • the terminal device 210 may monitor the first indication indicating the system information to be changed in at least one paging occasion per modification period. For example, if the terminal device 210 is provided with a common search space, the terminal device 210 may monitor the first indication in any paging occasion at least once per modification period.
  • the terminal device 210 may be in a RRC connected state.
  • the first indication may include identifiers of one or more SIBs to be changed.
  • the SIBs may include one or more of: a master information Konaktiebolaget LM Ericsson (publ) - 30 - 30A-162143 block (MIB), SIB1, or SIB2.
  • SIB1 may carry all basic information for the terminal device 210 to perform an initial attachment procedure and may also carry scheduling information for other SIBs.
  • SIB2 may include radio resource configuration information that is common for all terminal devices, for example, access class barring configuration, random access channel related configuration, SRS configuration and the like.
  • the first indication may indicate one or more of specific SIB numbers.
  • the first indication may indicate that SIB1 or SIB2 is to be changed. Then, if there is any applicable SIB for the terminal device in the RRC connected state, the terminal device in the RRC connected state may read one or more specific SIBs according to a current 3GPP specification (for example, clause 5.2 at 3GPP TS 38.331 V15.0.0 (published on 2018-01)).
  • the first indication indicates that a purpose of the system information is for measurement updating for the terminal devices in the RRC connected state.
  • the first indication describes the purpose of the specific SIB.
  • the first indication may indicate ”measurement update for terminal devices in the RRC connected state”. Then, the terminal device in the RRC connected state may read one or more SIBs related to a measurement configuration for RRC connected terminal devices.
  • the first indication may be a SIB modification indication transmitted in the paging message or the DCI.
  • an existing SIB modification indication (such as, an IE “systemInfoModification”) may be reused as the first indication.
  • the terminal device 210 is in a RRC idle state or inactive state and is configured with a synchronization signal block (SSB) measurement during a RRC release procedure, the existing SIB modification indication may be reused as the first indication.
  • SSB synchronization signal block
  • the network device 220 transmits (2060) the system information indicated to be changed by the first indication to at least one terminal device, such as the terminal device 210, via a broadcast signaling.
  • the system information indicates a first measurement configuration.
  • the terminal device 210 receives the system information from the network device 210.
  • the system information may be received on a broadcast control channel (BCCH).
  • BCCH broadcast control channel
  • a signaling cost for transmitting the first measurement configuration can be saved.
  • the first measurement configuration may be used for measuring one or more cells.
  • the one or more cells may include the serving cell 101.
  • the one or more cells may include one or more neighbor cells, for example, the cell 102 and/or the cell 103. It is noted that the one or more cells may include any proper number of cells.
  • the first measurement configuration may include any measurement related configuration.
  • the first measurement configuration may include a measurement object on which the terminal device 210 performs the measurement.
  • the first measurement configuration may include a list of measurement objects.
  • the first measurement configuration may include a measurement identity.
  • the first measurement configuration may include a reporting configuration.
  • the first measurement configuration may include a quantity configuration.
  • the first measurement configuration may further include one or more of: a measurement gap or a list of excluded cells.
  • the first measurement configuration transmitted in a SIB can use a predefined (or reserved) value.
  • the first measurement configuration transmitted in the SIB can use a predefined measurement object ID, a measurement identity or a measurement reporting configuration not to overlap the existing measurement configuration.
  • whether to apply the first measurement configuration broadcasted on a BCCH channel is different, depending on the RRC state and when the system information is changed.
  • the terminal device 210 may ignore the first measurement configuration transmitted on the BCCH channel for terminal devices in the RRC connected state.
  • the terminal device 210 may ignore the first measurement configuration transmitted on the BCCH channel for the terminal devices in the RRC connected state.
  • the terminal device 210 may be configured to perform a measurement when the terminal device 210 is in the RRC idle or inactive state, which is known as early measurement.
  • the terminal device 210 may apply the first measurement configuration.
  • the terminal device 210 may be configured with a SSB measurement during a RRC release procedure.
  • the terminal device 210 may receive a measurement configuration (referred to as “second measurement configuration”) from the network device 220 via a dedicated signaling in the modification period.
  • the network device 220 may transmit (2055) the second measurement configuration to the terminal device 210 via the dedicated signaling (for example, a RRC message).
  • the terminal device 210 may skip receiving the system information in the subsequent modification period.
  • the terminal device 210 may not apply the first measurement configuration transmitted in the system information after receiving the changed system information during modification period ‘n+1’.
  • the terminal device 210 may not apply the measurement configuration via dedicated signaling during the modification period ‘n’ as in the above description, it may be expected that the terminal device 210 receives the measurement configuration which will be updated in the SIB soon.
  • the terminal device 210 may apply the first measurement indicated in the system information if the terminal device 210 is in the RRC connected state.
  • the terminal device 210 in the RRC connected sate may apply the first measurement configuration included in the system information after receiving the first indication indicating the system information to be changed. In this way, a size of RRC reconfiguration message can be reduced.
  • the terminal device 210 may receive the first measurement configuration from the network device 220 upon receiving the first indication indicating the system information to be changed. In other words, regardless of the modification period, the network device 220 may transmit the system information including the first measurement configuration immediately. In this case, after receiving the first indication indicating the system information to be changed, the terminal device 210 may start to read the system information including the first measurement configuration immediately.
  • the terminal device 210 may receive the first indication indicating the system information to be changed from the network device 220 in a modification period. The terminal device 210 may then receive the system information including the first measurement configuration in a subsequent modification period. That is to say, the network device 220 may transmit the first indication during modification period n, wherein n is an integer number. The network device 220 may further transmit the system information in a modification period n+1. In this case, the terminal device 210 may apply the system information (SI) acquisition procedure from a start of the subsequent modification period (for example, the modification period n+1).
  • SI system information
  • the system information may include a SIB that includes the first measurement configuration by the terminal devices in the RRC connected state.
  • behaviors of the terminal device 210 when the SIB is received may look like below: Actions upon reception of SIBx Upon receiving SIBx the UE shall: 1> if in RRC_CONNECTED while T311 is not running: 2>perform the measurement configuration procedure as specified in 5.5.2; where T311 is a timer that is used for selecting and reconnecting with cell again and SIBx refers to the SIB that includes the first measurement configuration.
  • T311 is running, the terminal device is in a RRC reestablishment procedure and may select and reconnect with a cell.
  • the system information may include a SIB for terminal devices in the radio resource control idle state that includes a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state.
  • an existing SIB may be reused to signal the first measurement configuration.
  • the existing SIB for example, SIB3/SIB4/SIB5
  • SIB3/SIB4/SIB5 for terminal devices in the RRC idle state is used for transmitting the first measurement configuration for the terminal device 210 which is in the RRC connected state, where a new field for the terminal device in the RRC connected state is introduced in the existing SIB.
  • the terminal device 210 may apply the field for the terminal device in the RRC connected state in the existing SIB and modify the existing measurement configuration received via dedicated signaling.
  • the SIB2 is re used, behaviors of the terminal device 210 when the existing SIB is received may look like below.
  • the UE Upon receiving SIB2, the UE shall: 1> if in RRC_IDLE or in RRC_INACTIVE or in RRC_CONNECTED while T311 is running: 2>if, for the entry in frequencyBandList with the same index as the frequency band selected in clause 5.2.2.4.2, the UE supports at least one additionalSpectrumEmission in the NR-NS-PmaxList within the frequencyBandList: 3>apply the first listed additionalSpectrumEmission which it supports among the values included in NR-NS-PmaxList within frequencyBandList; 3> if the additionalPmax is present in the same entry of the selected additionalSpectrumEmission within NR-NS-PmaxList: 4>apply the additionalPmax; 3>else: 4>apply the p-Max; 3> if the UE selects a frequency band (from the procedure in clause 5.
  • an example IE of the SIB for the first measurement configuration may be as blow where the SIB (represented as “SIBx” below) may include the measurement configuration for the terminal devices in the RC connected state.
  • an example IE of the SIB for the first measurement configuration may be as below where the SIB (represented as “SIBx” below) may include the measurement configuration for the terminal devices in the RRC connected state. The example below only includes measurement objects.
  • SIBx SEQUENCE ⁇ measObjectToRemoveList MeasObjectToRemoveList OPTIONAL, measObjectToAddModList MeasObjectToAddModList OPTIONAL, lateNonCriticalExtension OCTET STRING OPTIONAL, ... ⁇ -- TAG-SIBx-STOP -- ASN1STOP Wegiebolaget LM Ericsson (publ) - 37 - 30A-162143 [00108]
  • an example IE of the SIB for the first measurement configuration may be as below where the SIB (represented as “SIBx” below) may include the measurement configuration for the terminal devices in the RRC connected state.
  • the terminal device 210 may receive the SIB and this SIB may include a list of frequencies and each of such frequencies may include an updated cell list for the list of excluded cells on that frequency.
  • -- ASN1START -- TAG-SIBx-START SIBx :: SEQUENCE ⁇ measCarrierUpdateList MeasCarrierUpdateList, lateNonCriticalExtension OCTET STRING OPTIONAL, ...
  • the terminal device 210 updates (2070) an existing measurement configuration based on the first measurement configuration.
  • the existing measurement configuration may be a measurement configuration previously receives via a dedicated signaling.
  • the existing measurement configuration may refer to the measurement configuration transmitted (2020) by the network device 220.
  • the existing measurement configuration may be a measurement configuration previously receives via another broadcast signaling.
  • the terminal device 210 may transmit (2080 ) feedback information to the network device 220.
  • the network device 220 may receive the feedback information from the terminal device 210.
  • the feedback may indicate whether the first measurement configuration is successfully applied. In some embodiments, if the feedback information indicates “success”, it means that the first measurement configuration is successfully applied.
  • the feedback information may be transmitted in a RRC message, for example, a measurement report.
  • the feedback information may be transmitted in a medium access control (MAC) layer signaling.
  • the feedback information may be transmitted in a physical layer signaling.
  • the network device 220 may ignore the measurement report.
  • the terminal device 210 may add or remove a cell from the list of excluded.
  • the updating the existing measurement configuration may include an addition or removal of a cell from the list of excluded cells as configured in the existing measurement configuration to the terminal device 210.
  • the terminal device 210 may stop a timer that is running associated with the cell.
  • the terminal device 210 may stop any timers that are running in relation to the cell that has been added or removed from the list of excluded cells.
  • An example of such a timer may be a timer associated to a time to trigger an evaluation of a measurement report.
  • Another example of such a timer may be the timer associated to a report interval associated to the measurement report.
  • the terminal device 210 may add or remove the cell to a conditional handover related configuration. For example, if the terminal device 210 is configured with a conditional handover related configuration for the cell that has been made part of the list of excluded cells, the terminal device 210 may discard the stored conditional handover configuration associated to said cell.
  • the system information may also indicate expiry time (or validity time) for the first measurement configuration. In this case, the terminal device 210 Konaktiebolaget LM Ericsson (publ) - 39 - 30A-162143 may determine whether the expiry time is elapsed. If the expiry time is elapsed, the terminal device 210 may remove the first measurement configuration.
  • the expiry time may be indicated by absolute time or a frame number.
  • the expiry time may be provided by means of frame number.
  • the frame number may include one of: a hyper frame number (HFN), a system frame number (SFN), or a subframe number.
  • the expiry time may be indicated by a time duration where the system information comprising the first measurement configuration is valid.
  • the terminal device 210 may start a validity timer with the expiry time upon the reception of the system information.
  • the terminal device 210 may start validity timer with the received expiry time value when the terminal device 210 successfully receives the expiry time. In this case, when the validity timer expires, the terminal device 210 may consider that the system information including the first measurement configuration is not valid. In other words, after the validity timer expires, the terminal device 210 may remove the first measurement configuration received in the system information. [00118] In some embodiments, the terminal device 210 may be configured with a maximum duration for reading the system information that includes the first measurement configuration. In this case, in some embodiments, the terminal device 210 may start a timer associated with reading the system information upon the reception of the first indication.
  • the terminal device 210 may start a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs. In some other embodiments, the terminal device 210 may start the timer associated with reading the system information, upon successfully receiving the corresponding SIB.
  • the system information may also indicate a validity area for the first measurement configuration. In this case, if the terminal device 210 enters a cell that does not belong to the validity area, the terminal device 210 may remove the first measurement configuration.
  • the validity area may be represented by a list of cells. Alternatively, the validity area may be represented by a tracking area.
  • the validity area may be Konaktiebolaget LM Ericsson (publ) - 40 - 30A-162143 provided when broadcasting the first measurement configuration for the terminal device in the RRC idle or inactive state with the early measurement.
  • the terminal device 210 may apply the received first measurement configuration transmitted via SIB within the validity area.
  • the terminal device 210 may consider that the first measurement configuration received via the SIB is invalid and remove the first measurement configuration. In this way, it can reduce effort of reading SIBs and save power.
  • the terminal device 210 when the terminal device 210 enters the cell which does not belong to the validity area, the terminal device 210 considers that the first measurement configuration received via the SIB is invalid but does not remove the first measurement configuration until the expiry time is elapsed. Before the expiry time, if the terminal device 210 enters the cell which belongs to the validity area, the terminal device 210 may consider that the first measurement configuration received via the SIB valid. [00121] In an embodiment, the terminal device 210 may transit from the RRC connected state to the RRC idle or inactive state. In this case, the terminal device 210 may remove the first measurement configuration.
  • the terminal device 210 may continue to apply the first measurement configuration. In some embodiments, if the terminal device 210 in the RRC idle or inactive state with the measurement selects to another cell, the terminal device 210 may remove the first measurement configuration.
  • the network device 220 may transmit (2085) an indication (referred to as “second indication”) for releasing the first measurement configuration to the terminal device 210. In other words, the terminal device 210 may receive the second information from the network device 220. In this case, the terminal device 210 may release (2090) the first measurement configuration based on the second indication.
  • the terminal device 210 may continue to use the first measurement configuration until the terminal device 210 receives a configuration which releases the first measurement configuration via a broadcast/dedicated signaling or a relevant SIB/field is not broadcasted.
  • the terminal device can receive measurement related information which modifies the existing measurement configuration via broadcast signaling and modify the existing measurement configuration. In this way, it can reduce the cost which is raised due to signaling the same information vie dedicated signaling.
  • FIG. 3 to FIG. 7 show examples of signaling for transmitting a measurement configuration via a broadcast signaling, respectively.
  • FIG. 3 shows a signaling chart 300 for updating the measurement configuration where a new SIB is used, according to some embodiments of the present disclosure.
  • the terminal device 210 and the network device 220 may perform (3010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2.
  • the network device 220 may transmit (3020) a RRC reconfiguration message including a measurement configuration to the terminal device 210.
  • the terminal device 210 may apply the received measurement configuration.
  • the terminal device 210 may transmit (3030) a RRC reconfiguration complete message, after applying the received measurement configuration.
  • the network device 220 may determine (3040) that there is a need for measurement configuration update.
  • the network device 220 may determine that the measurement configuration may be needed for all RRC connected terminal devices due to a cell in a locking process.
  • the network device 220 may transmit (3050) a DCI on a physical downlink control channel (PDCCH).
  • the DCI may include a system information modification indication.
  • the network device 220 may transmit (3060) a new SIB including another measurement configuration. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB for terminal devices in the RRC connected state in a next medication period.
  • the terminal device 210 may update (3070) the existing stored measurement configuration (which is received at Konaktiebolaget LM Ericsson (publ) - 42 - 30A-162143 3020) based on the other measurement configuration received at 3060. Terminal devices in the RRC idle or inactive state may receive other SIBs except the new SIB.
  • FIG. 4 shows a signaling chart 400 for updating the measurement configuration where a new indication and a new SIB are used, according to some embodiments of the present disclosure.
  • the terminal device 210 and the network device 220 may perform (4010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2.
  • the network device 220 may transmit (4020) a RRC reconfiguration message including a measurement configuration to the terminal device 210.
  • the terminal device 210 may apply the received measurement configuration.
  • the terminal device 210 may transmit (4030) a RRC reconfiguration complete message, after applying the received measurement configuration.
  • the network device 220 may determine (4040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for all terminal devices in the RRC connected state due to a cell in a locking process.
  • the network device 220 may transmit (4050) a DCI on a physical downlink control channel (PDCCH).
  • the DCI may include a new indication that indicates the system information is to be changed for the measurement configuration.
  • the network device 220 may transmit (4060) a new SIB including another measurement configuration. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB for terminal devices in the RRC connected state in a next medication period. The terminal device 210 may update (4070) the existing stored measurement configuration (which is received at 4020) based on the other measurement configuration received at 4060. Terminal devices in the RRC idle or inactive state may not try to read the received SIB.
  • the terminal device 210 and the network device 220 may perform (5010) a RRC connection establishment procedure.
  • the RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2.
  • the network device 220 may transmit (5020) a RRC reconfiguration message including a measurement configuration to the terminal device 210.
  • the terminal device 210 may apply the received measurement configuration.
  • the terminal device 210 may transmit (5030) a RRC reconfiguration complete message, after applying the received measurement configuration.
  • the network device 220 may determine (5040) that there is a need for measurement configuration update.
  • the network device 220 may determine that the measurement configuration may be needed for all terminal devices in the RRC connected state due to a locking process of one or more neighbor cells.
  • the network device 220 may transmit (5050) a DCI on a physical downlink control channel (PDCCH).
  • the DCI may include a new indication that indicates the system information is to be changed for the measurement configuration.
  • the network device 220 may transmit (5060) a new SIB including another measurement configuration.
  • the other measurement configuration may include a list of excluded cells that contains the one or more neighbor cells. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB for terminal devices in the RRC connected state in a next medication period.
  • the terminal device 210 may update (5070) the existing stored measurement configuration regarding the list of excluded cells. Terminal devices in the RRC idle or inactive state may not try to read the received SIB.
  • FIG. 6 shows a signaling chart 600 for updating the measurement configuration where a new indication and a new SIB are used, according to some embodiments of the present disclosure.
  • the terminal device 210 and the network device 220 may perform (6010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2.
  • the network device 220 may transmit (6020) a RRC reconfiguration message including a measurement configuration to the terminal device 210.
  • the terminal device 210 may apply the received measurement configuration.
  • the terminal device 210 may transmit (6030) a RRC reconfiguration complete message, after applying the received measurement configuration.
  • the network device 220 may determine (6040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for terminal devices in the RRC connected state due to a locking process of one or more neighbor cells.
  • the network device 220 may transmit (6050) a DCI on a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • the DCI may include a new indication that indicates the system information is to be changed for the measurement configuration.
  • the network device 220 may transmit (6060) a new SIB including another measurement configuration.
  • the other measurement configuration may indicate expiry time and a list of excluded cells that contains the one or more neighbor cells. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB in a next medication period.
  • the terminal device 210 may update (6070) an existing measurement configuration regarding the excluded cell list. Terminal devices in the RRC idle or inactive state may not try to read the received SIB.
  • the terminal device 210 may start (6080) a validity timer with the expiry time upon the reception of the system information.
  • the terminal device 210 may determine (6085) whether the expiry time is elapsed. If the expiry time is elapsed, the terminal device 210 may remove (6090) the other measurement configuration received at 6060. If the expiry time is not elapsed, the terminal device 210 may continuously apply the other measurement configuration.
  • FIG. 7 shows a signaling chart 700 for updating the measurement configuration where a new indication and a new SIB are used, according to some embodiments of the present disclosure.
  • the terminal device 210 and the network device 220 may perform (7010) a RRC connection establishment procedure.
  • the RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2.
  • the network device 220 may transmit (7020) a RRC reconfiguration message including a measurement configuration to the terminal device 210.
  • the terminal device 210 may apply the received measurement configuration.
  • the terminal device 210 may transmit (7030) a RRC reconfiguration complete message, after applying the received measurement configuration.
  • the network device 220 may determine (7040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for all RRC connected terminal devices due to a cell shunting down.
  • the network device 220 may transmit (7050) a DCI on a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • the DCI may include a system information modification indication.
  • the network device 220 may transmit (7060) a new SIB including another measurement configuration.
  • the terminal device 211 that is in the RRC idle or inactive state may not try to read the received SIB.
  • the terminal device 211 may transmit (7065) a measurement report that is obtained based on a previously received measurement configuration.
  • the terminal device 210 in the RRC connected state may receive the new SIB in a next medication period.
  • the terminal device 210 may update (7070) the existing measurement configuration (which is received at 7020) based on the other measurement configuration received at 7060.
  • FIG. 8 is a flowchart of an example method implemented by a terminal device in accordance with an embodiment of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the terminal device 110 in FIG.1.
  • the terminal device 110 may determine whether the DCI includes the SIB change indication for the measurement configuration. If there is no SIB change indication, the terminal device 110 may not take any action at block 850.
  • the terminal device 110 may determine whether it is in the RRC connected state or in the RRC idle or inactive state with SSB measurement, at block 820. If the terminal device 110 is not in the RRC connected state or in the RRC idle or inactive state with SSB measurement, the terminal device 110 may take no action at block 850. [00159] At block 830, if the terminal device 110 is in the RRC connected state or in the RRC idle or inactive state with SSB measurement, the terminal device 110 may read SIB1 for SIB scheduling information and read a relevant SIB for the measurement configuration. At block 840, the terminal device 110 may modify the existing measurement configuration with the measurement configuration in the relevant SIB. [00160] FIG.
  • the terminal device 110 receives from a network device 120, a first indication indicating system information to be changed.
  • the first indication may be from a serving cell of the terminal device, and the first measurement configuration may be used for measuring one or more cells.
  • the terminal device 110 receives, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication.
  • the system information includes a first measurement configuration.
  • the terminal device 110 updates an existing measurement configuration based on the first measurement configuration.
  • updating the existing measurement configuration may comprise at least one of: an addition or removal of a cell from a list of excluded cells, stopping a timer that is running associated with the cell, or an addition or removal of the cell to a conditional handover related configuration.
  • the terminal device 110 may be in a radio resource control connected state.
  • the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state.
  • SIBs system information blocks
  • the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state.
  • the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state.
  • receiving the system information may comprise receiving the first measurement configuration upon receiving the first indication indicating the system information to be changed.
  • receiving the first indication may comprise: receiving the first indication indicating the system information to be changed in a modification period.
  • receiving the system information may comprise receiving the system information comprising the first measurement configuration in a subsequent modification period.
  • the terminal device 110 may receive a second measurement configuration via a dedicated signaling in the modification period. In this case, the terminal device may skip receiving the system information in the subsequent modification period. In an example, the terminal device 110 may monitor the first indication indicating the system information to be changed in at least one paging occasion per modification period. [00169] In an example, in response to that the terminal device 110 transits from the radio resource control connected state to a radio resource control idle or inactive state, the terminal device 110 may remove the first measurement configuration. In an example, in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state that is configured with measurement during the radio resource control release procedure, the terminal device 110 may continue to apply the first measurement configuration.
  • the terminal device 110 may be in a radio resource control idle state or in inactive state.
  • the terminal device 110 may be configured with a SSB measurement during a radio resource control release procedure.
  • the system information may further indicate a validity area for the first measurement configuration. In this case, in response to that the terminal device enters a cell that does not belong to the validity area, the terminal device 110 may remove the first measurement configuration.
  • the system information may further indicate expiry time for the first measurement configuration. In this case, the terminal device 110 may determine whether the expiry time is elapsed.
  • the terminal device 110 may remove the first measurement configuration.
  • the expiry time may be indicated by one of: absolute time or a time duration.
  • the terminal device 110 may start a validity timer with the expiry time upon the reception of the system information.
  • the terminal device may be configured with a maximum duration for reading the system information that comprises the first measurement configuration.
  • the terminal device 110 may start a timer associated with reading the system information upon the reception of the first indication.
  • the terminal device 110 may start a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs.
  • the first indication may be a SIB modification indication transmitted in a paging message or downlink control information.
  • the terminal device 110 may transmit to the network device 120, feedback information indicating whether the first measurement configuration is successfully applied.
  • the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells.
  • FIG.10 is a flowchart of an example method implemented by a terminal device in accordance with an embodiment of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the network device 120 in FIG.1.
  • the network device 120 transmits to at least one terminal device, a first indication indicating system information to be changed.
  • the first indication may be transmitted in a serving cell of the at least one terminal device, and the first measurement configuration may be used for one or more cells.
  • the network device 120 transmits, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication.
  • the system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device.
  • the at least one terminal device is in a radio resource control connected state.
  • the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state.
  • the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state.
  • the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state.
  • the network device 120 may transmit the first indication indicating the system information to be changed in a modification period.
  • the network device 120 may transmit the system information comprising the first measurement configuration in a subsequent modification period.
  • the network device 120 may transmit a second measurement configuration via a dedicated signaling in the modification period.
  • the network device 120 may transmit the first indication indicating the system information to be changed in at least one paging occasion per modification period.
  • the at least one terminal device may be a radio resource control idle state or in inactive state.
  • the terminal device110 may be configured with a synchronization signal block (SSB) measurement during a radio resource control release procedure.
  • the system information may further indicate a validity area for the first measurement configuration.
  • the system information may further indicate Konaktiebolaget LM Ericsson (publ) - 50 - 30A-162143 expiry time for the first measurement configuration.
  • the expiry time may be indicated by one of: absolute time or a time duration.
  • the first indication may be a SIB modification indication transmitted in a paging message or downlink control information.
  • the network device 120 may receive, from the at least one terminal device, feedback information indicating whether the first measurement configuration is successfully applied.
  • the network device 120 may transmit, to the at least one terminal device, a second indication for releasing the first measurement configuration.
  • the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells.
  • FIG.11 is a block diagram showing an apparatus suitable for use in practicing some embodiments of the disclosure.
  • the apparatus 1100 may include a processor 1110, a memory 1120 that stores a program, and optionally a communication interface 1130 for communicating data with other external devices through wired and/or wireless communication.
  • the program includes program instructions that, when executed by the processor 1110, enable the apparatus 1100 to operate in accordance with the embodiments of the present disclosure, as discussed above. That is, the embodiments of the present disclosure may be implemented at least in part by computer software executable by the processor 1110, or by hardware, or by a combination of software and hardware.
  • the memory 1120 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor- based memory devices, flash memories, magnetic memory devices and systems, optical memory devices and systems, fixed memories and removable memories.
  • the processor 1110 may be of any type suitable to the local technical environment, and may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multi-core processor architectures, as non- limiting examples.
  • DSPs digital signal processors
  • FIG. 12A shows a block diagram showing an apparatus 1200 suitable for use in practicing some embodiments of the present disclosure.
  • the apparatus 1200 may be the terminal device 110 shown in FIG.1.
  • the apparatus 1200 may include a transceiver module 1210 that is configured to receive, from a network device, a first indication indicating system information to be changed.
  • the transceiver module 1210 may also be configured to receive, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication.
  • the system information may include a first measurement configuration.
  • the apparatus 1200 may also include a processing module 1220 that is configured to update an existing measurement configuration based on the first measurement configuration.
  • the transceiver module 1210 and the processing module 1220 may also be configured to perform the method described with reference to FIG.9. [00190] FIG.
  • the apparatus 1201 may be the network device 120 shown in FIG.1.
  • the apparatus 1201 may include a transceiver module 1211 that is configured to transmit, to at least one terminal device, a first indication indicating system information to be changed.
  • the transceiver module 1211 may also be configured to transmit, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication.
  • the system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device.
  • the network device 1201 may also include other modules, for example, a processing module 1221.
  • FIG. 13 shows an example of a communication system 3100 in accordance with some embodiments.
  • the communication system 3100 includes a telecommunication network 3102 that includes an access network 3104, such as a radio access network (RAN), and a core network 3106, which includes one or more core network nodes 3108.
  • an access network 3104 such as a radio access network (RAN)
  • RAN radio access network
  • core network 3106 which includes one or more core network nodes 3108.
  • the access network 3104 includes one or more access network nodes, such as network nodes 3110a and 3110b (one or more of which may be generally referred to as network nodes 3110), or any other similar 3rd Generation Partnership Project (3GPP) access node or non-3GPP access Wegiebolaget LM Ericsson (publ) - 52 - 30A-162143 point.
  • the network nodes 3110 facilitate direct or indirect connection of user equipment (UE), such as by connecting UEs 3112a, 3112b, 3112c, and 3112d (one or more of which may be generally referred to as UEs 3112) to the core network 3106 over one or more wireless connections.
  • UE user equipment
  • Example wireless communications over a wireless connection include transmitting and/or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and/or other types of signals suitable for conveying information without the use of wires, cables, or other material conductors.
  • the communication system 3100 may include any number of wired or wireless networks, network nodes, UEs, and/or any other components or systems that may facilitate or participate in the communication of data and/or signals whether via wired or wireless connections.
  • the communication system 3100 may include and/or interface with any type of communication, telecommunication, data, cellular, radio network, and/or other similar type of system.
  • the UEs 3112 may be any of a wide variety of communication devices, including wireless devices arranged, configured, and/or operable to communicate wirelessly with the network nodes 3110 and other communication devices.
  • the network nodes 3110 are arranged, capable, configured, and/or operable to communicate directly or indirectly with the UEs 3112 and/or with other network nodes or equipment in the telecommunication network 3102 to enable and/or provide network access, such as wireless network access, and/or to perform other functions, such as administration in the telecommunication network 3102.
  • the core network 3106 connects the network nodes 3110 to one or more hosts, such as host 3116. These connections may be direct or indirect via one or more intermediary networks or devices.
  • the core network 3106 includes one more core network node (e.g., core network node 3108) that are structured with hardware and software components. Features of these components may be substantially similar to those described with respect to the UEs, network nodes, and/or hosts, such that the descriptions thereof are generally applicable to the corresponding components of the core network node 3108.
  • Example core network nodes include functions of one or more of a Mobile Switching Center (MSC), Mobility Management Entity (MME), Home Subscriber Server (HSS), Access and Mobility Management Function (AMF), Session Management Function (SMF), Authentication Server Konaturationt LM Ericsson (publ) - 53 - 30A-162143 Function (AUSF), Subscription Identifier De-concealing function (SIDF), Unified Data Management (UDM), Security Edge Protection Proxy (SEPP), Network Exposure Function (NEF), and/or a User Plane Function (UPF).
  • MSC Mobile Switching Center
  • MME Mobility Management Entity
  • HSS Home Subscriber Server
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • AUSF Subscription Identifier De-concealing function
  • UDM Unified Data Management
  • SEPP Security Edge Protection Proxy
  • NEF Network Exposure Function
  • UPF User Plane Function
  • the host 3116 may be under the ownership or control of a service provider other than an operator or provider of the access network 3104 and/or the telecommunication network 3102 and may be operated by the service provider or on behalf of the service provider.
  • the host 3116 may host a variety of applications to provide one or more service. Examples of such applications include live and pre-recorded audio/video content, data collection services such as retrieving and compiling data on various ambient conditions detected by a plurality of UEs, analytics functionality, social media, functions for controlling or otherwise interacting with remote devices, functions for an alarm and surveillance center, or any other such function performed by a server.
  • the communication system 3100 of FIG. 13 enables connectivity between the UEs, network nodes, and hosts.
  • the communication system may be configured to operate according to predefined rules or procedures, such as specific standards that include, but are not limited to: Global System for Mobile Communications (GSM); Universal Mobile Telecommunications System (UMTS); Long Term Evolution (LTE), and/or other suitable 2G, 3G, 4G, 5G standards, or any applicable future generation standard (e.g., 6G); wireless local area network (WLAN) standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards (WiFi); and/or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave, Near Field Communication (NFC) ZigBee, LiFi, and/or any low-power wide-area network (LPWAN) standards such as LoRa and Sigfox.
  • GSM Global System for Mobile Communications
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • 6G wireless local area network
  • WiFi wireless local area network
  • WiMax Worldwide Interoperability for Micro
  • the telecommunication network 3102 is a cellular network that implements 3GPP standardized features. Accordingly, the telecommunications network 3102 may support network slicing to provide different logical networks to different devices that are connected to the telecommunication network 3102. For example, the telecommunications network 3102 may provide Ultra Reliable Low Latency Communication (URLLC) services to some UEs, while providing Enhanced Mobile Broadband (eMBB) services to other UEs, and/or Massive Machine Type Communication (mMTC)/Massive IoT services to yet further UEs.
  • URLLC Ultra Reliable Low Latency Communication
  • eMBB Enhanced Mobile Broadband
  • mMTC Massive Machine Type Communication
  • the UEs 3112 are configured to transmit and/or receive information without direct human interaction.
  • a UE may be designed to transmit information to the access network 3104 on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the access network 3104.
  • a UE may be configured for operating in single- or multi-RAT or multi- standard mode.
  • a UE may operate with any one or combination of Wi-Fi, NR (New Radio) and LTE, i.e., being configured for multi-radio dual connectivity (MR-DC), such as E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) New Radio – Dual Connectivity (EN-DC).
  • MR-DC multi-radio dual connectivity
  • E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
  • EN-DC Dual Connectivity
  • the hub 3114 communicates with the access network 3104 to facilitate indirect communication between one or more UEs (e.g., UE 3112c and/or 3112d) and network nodes (e.g., network node 3110b).
  • the hub 3114 may be a controller, router, content source and analytics, or any of the other communication devices described herein regarding UEs.
  • the hub 3114 may be a broadband router enabling access to the core network 3106 for the UEs.
  • the hub 3114 may be a controller that sends commands or instructions to one or more actuators in the UEs. Commands or instructions may be received from the UEs, network nodes 3110, or by executable code, script, process, or other instructions in the hub 3114.
  • the hub 3114 may be a data collector that acts as temporary storage for UE data and, in some embodiments, may perform analysis or other processing of the data.
  • the hub 3114 may be a content source.
  • the hub 3114 may retrieve VR assets, video, audio, or other media or data related to sensory information via a network node, which the hub 3114 then provides to the UE either directly, after performing local processing, and/or after adding additional local content.
  • the hub 3114 acts as a proxy server or orchestrator for the UEs, in particular in if one or more of the UEs are low energy IoT devices.
  • the hub 3114 may have a constant/persistent or intermittent connection to the network node 3110b.
  • the hub 3114 may also allow for a different communication scheme and/or schedule between the hub 3114 and UEs (e.g., UE 3112c and/or 3112d), and between the hub 3114 and the core network 3106.
  • the hub 3114 is connected to the core network 3106 and/or one or more UEs via a wired connection.
  • the hub 3114 may be configured to connect to an M2M service provider over the access network 3104 and/or to another UE over a direct connection.
  • UEs may establish a wireless connection with the network nodes 3110 while still connected via the hub 3114 via a wired or wireless connection.
  • the hub 3114 may be a dedicated hub – that is, a hub whose primary function is to route communications to/from the UEs from/to the network node 3110b.
  • the hub 3114 may be a non-dedicated hub – that is, a device which is capable of operating to route communications between the UEs and network node 3110b, but which is additionally capable of operating as a communication start and/or end point for certain data channels.
  • FIG.14 is a block diagram of a host 3200, which may be an embodiment of the host 3116 of FIG. 13, in accordance with various aspects described herein.
  • the host 3200 may be or comprise various combinations hardware and/or software, including a standalone server, a blade server, a cloud-implemented server, a distributed server, a virtual machine, container, or processing resources in a server farm.
  • the host 3200 may provide one or more services to one or more UEs.
  • the host 3200 includes processing circuitry 3202 that is operatively coupled via a bus 3204 to an input/output interface 3206, a network interface 3208, a power source 3210, and a memory 3212.
  • Other components may be included in other embodiments. Features of these components may be substantially similar to those described with respect to the devices of previous figures such that the descriptions thereof are generally applicable to the corresponding components of host 3200.
  • the memory 3212 may include one or more computer programs including one or more host application programs 3214 and data 3216, which may include user data, e.g., data generated by a UE for the host 3200 or data generated by the host 3200 for a UE.
  • Embodiments of the host 3200 may utilize only a subset or all of the components shown.
  • the host application programs 3214 may be implemented in a container-based architecture and may provide support for video codecs (e.g., Versatile Video Coding (VVC), High Efficiency Video Coding (HEVC), Advanced Video Coding (AVC), MPEG, VP9) and audio codecs (e.g., FLAC, Advanced Audio Coding (AAC), MPEG, G.711), including transcoding for multiple different classes, types, or implementations of UEs (e.g., handsets, desktop computers, wearable display systems, heads-up display systems).
  • video codecs e.g., Versatile Video Coding (VVC), High Efficiency Video Coding (HEVC), Advanced Video Coding (AVC), MPEG, VP9
  • audio codecs e.g., FLAC, Advanced Audio Coding (AAC), MPEG, G.711
  • UEs e.g., handsets, desktop computers, wearable display systems, heads-up display systems.
  • the host application programs 3214 may also provide for user authentication and licensing checks and may Konaktiebolaget LM Ericsson (publ) - 56 - 30A-162143 periodically report health, routes, and content availability to a central node, such as a device in or on the edge of a core network. Accordingly, the host 3200 may select and/or indicate a different host for over-the-top services for a UE.
  • the host application programs 3214 may support various protocols, such as the HTTP Live Streaming (HLS) protocol, Real-Time Messaging Protocol (RTMP), Real-Time Streaming Protocol (RTSP), Dynamic Adaptive Streaming over HTTP (MPEG-DASH), etc.
  • HLS HTTP Live Streaming
  • RTMP Real-Time Messaging Protocol
  • RTSP Real-Time Streaming Protocol
  • MPEG-DASH Dynamic Adaptive Streaming over HTTP
  • FIG. 15 shows a communication diagram of a host 3302 communicating via a network node 3304 with a UE 3306 over a partially wireless connection in accordance with some embodiments.
  • Example implementations, in accordance with various embodiments, of the UE (such as a UE 3112a of FIG.13), network node (such as network node 3110a of FIG. 13), and host (such as host 3116 of FIG. 13 and/or host 3200 of FIG. 14) discussed in the preceding paragraphs will now be described with reference to FIG.15.
  • embodiments of host 3302 include hardware, such as a communication interface, processing circuitry, and memory.
  • the host 3302 also includes software, which is stored in or accessible by the host 3302 and executable by the processing circuitry.
  • the software includes a host application that may be operable to provide a service to a remote user, such as the UE 3306 connecting via an over-the-top (OTT) connection 3350 extending between the UE 3306 and host 3302.
  • a host application may provide user data which is transmitted using the OTT connection 3350.
  • the network node 3304 includes hardware enabling it to communicate with the host 3302 and UE 3306.
  • the connection 3360 may be direct or pass through a core network (like core network 3106 of FIG.13) and/or one or more other intermediate networks, such as one or more public, private, or hosted networks.
  • an intermediate network may be a backbone network or the Internet.
  • the UE 3306 includes hardware and software, which is stored in or accessible by UE 3306 and executable by the UE’s processing circuitry.
  • the software includes a client application, such as a web browser or operator-specific “app” that may be operable to provide a service to a human or non-human user via UE 3306 with the support of the host 3302.
  • client application such as a web browser or operator-specific “app” that may be operable to provide a service to a human or non-human user via UE 3306 with the support of the host 3302.
  • an executing host application may communicate with the executing client application via the OTT connection 3350 terminating at the UE 3306 and host 3302.
  • the UE's client application may receive request data from the host's host application and provide user data in response to the request data.
  • the OTT connection 3350 may transfer both the request data and the user data.
  • the UE's client application may interact with the user to generate the user data that it provides to the host application through the OTT connection 3350.
  • the OTT connection 3350 may extend via a connection 3360 between the host 3302 and the network node 3304 and via a wireless connection 3370 between the network node 3304 and the UE 3306 to provide the connection between the host 3302 and the UE 3306.
  • connection 3360 and wireless connection 3370, over which the OTT connection 3350 may be provided have been drawn abstractly to illustrate the communication between the host 3302 and the UE 3306 via the network node 3304, without explicit reference to any intermediary devices and the precise routing of messages via these devices.
  • the host 3302 provides user data, which may be performed by executing a host application.
  • the user data is associated with a particular human user interacting with the UE 3306.
  • the user data is associated with a UE 3306 that shares data with the host 3302 without explicit human interaction.
  • the host 3302 initiates a transmission carrying the user data towards the UE 3306.
  • the host 3302 may initiate the transmission responsive to a request transmitted by the UE 3306.
  • the request may be caused by human interaction with the UE 3306 or by operation of the client application executing on the UE 3306.
  • the transmission may pass via the network node 3304, in accordance with the teachings of the embodiments described throughout this disclosure.
  • the network node 3304 transmits to the UE 3306 the user data that was carried in the transmission that the host 3302 initiated, in accordance with the teachings of the embodiments described throughout this disclosure.
  • the UE 3306 receives the user data carried in the transmission, which may be performed by a client application executed on the UE 3306 associated with the host application executed by the host 3302.
  • the UE 3306 executes a client application which provides user data to the host 3302.
  • the user data may be provided in reaction or response to the data received from the host 3302.
  • the UE 3306 may provide user data, which may be performed by executing the client application.
  • the client application may further consider user input received from the user via an input/output Wegiebolaget LM Ericsson (publ) - 58 - 30A-162143 interface of the UE 3306. Regardless of the specific manner in which the user data was provided, the UE 3306 initiates, in step 3318, transmission of the user data towards the host 3302 via the network node 3304.
  • the network node 3304 receives user data from the UE 3306 and initiates transmission of the received user data towards the host 3302.
  • the host 3302 receives the user data carried in the transmission initiated by the UE 3306.
  • One or more of the various embodiments improve the performance of OTT services provided to the UE 3306 using the OTT connection 3350, in which the wireless connection 3370 forms the last segment. More precisely, the teachings of these embodiments may improve the data rate and thereby provide benefits such as relaxed restriction on file size, improved content resolution, and better responsiveness.
  • factory status information may be collected and analyzed by the host 3302.
  • the host 3302 may process audio and video data which may have been retrieved from a UE for use in creating maps. As another example, the host 3302 may collect and analyze real-time data to assist in controlling vehicle congestion (e.g., controlling traffic lights). As another example, the host 3302 may store surveillance video uploaded by a UE. As another example, the host 3302 may store or control access to media content such as video, audio, VR or AR which it can broadcast, multicast or unicast to UEs. As other examples, the host 3302 may be used for energy pricing, remote control of non-time critical electrical load to balance power generation needs, location services, presentation services (such as compiling diagrams etc.
  • a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
  • the measurement procedure and/or the network functionality for reconfiguring the OTT connection may be implemented in software and hardware of the host 3302 and/or UE 3306.
  • sensors may be deployed in or in association with other devices through which the OTT connection 3350 passes; the sensors may participate in the measurement procedure by supplying values of the monitored Konaktiebolaget LM Ericsson (publ) - 59 - 30A-162143 quantities exemplified above, or supplying values of other physical quantities from which software may compute or estimate the monitored quantities.
  • the reconfiguring of the OTT connection 3350 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not directly alter the operation of the network node 3304. Such procedures and functionalities may be known and practiced in the art.
  • measurements may involve proprietary UE signaling that facilitates measurements of throughput, propagation times, latency and the like, by the host 3302.
  • the measurements may be implemented in that software causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 3350 while monitoring propagation times, errors, etc.
  • a method implemented in a host configured to operate in a communication system that further includes a network node and a user equipment (UE).
  • the method may comprise providing user data for the UE.
  • the method may further comprise initiating a transmission carrying the user data to the UE via a cellular network comprising the network node.
  • the network node may perform the following operations to transmit the user data from the host to the UE.
  • the network node may schedule, for a first terminal device whose capability of whether supporting FDM of a first physical channel for transmitting traffic data and a second physical channel for transmitting control information is unknown to the network node, one or more transmissions each using the first physical channel that is multiplexed with the second physical channel in an FDM manner.
  • the network node may perform the one or more transmissions to the first terminal device, based on the scheduling.
  • the network node may receive, from the first terminal device, one or more reception feedbacks on the one or more transmissions.
  • the network node may determine whether the first terminal device supports FDM of the first and second physical channels, based on the one or more reception feedbacks.
  • the method may further comprise, at the network node, transmitting the user data provided by the host for the UE.
  • the user data may be provided at the host by executing a host application that interacts with a client application executing on the UE.
  • the client application may be associated with the host application.
  • Kontiebolaget LM Ericsson (publ) - 60 - 30A-162143 there is provided a host configured to operate in a communication system to provide an over-the-top (OTT) service.
  • OTT over-the-top
  • the host may comprise processing circuitry configured to provide user data; and a network interface configured to initiate transmission of the user data to a network node in a cellular network for transmission to a user equipment (UE).
  • the network node may have a communication interface and processing circuitry.
  • the processing circuitry of the network node may be configured to perform the following operations to transmit the user data from the host to the UE.
  • the processing circuitry of the network node may be configured to schedule, for a first terminal device whose capability of whether supporting FDM of a first physical channel for transmitting traffic data and a second physical channel for transmitting control information is unknown to the network node, one or more transmissions each using the first physical channel that is multiplexed with the second physical channel in an FDM manner.
  • the processing circuitry of the network node may be configured to perform the one or more transmissions to the first terminal device, based on the scheduling.
  • the processing circuitry of the network node may be configured to receive, from the first terminal device, one or more reception feedbacks on the one or more transmissions.
  • the processing circuitry of the network node may be configured to determine whether the first terminal device supports FDM of the first and second physical channels, based on the one or more reception feedbacks.
  • the processing circuitry of the host may be configured to execute a host application that provides the user data.
  • the UE may comprise processing circuitry configured to execute a client application associated with the host application to receive the transmission of user data from the host.
  • a communication system configured to provide an over-the-top service.
  • the communication system may comprise a host.
  • the host may comprise processing circuitry configured to provide user data for a user equipment (UE).
  • the user data may be associated with the over-the-top service.
  • the host may further comprise a network interface configured to initiate transmission of the user data toward a cellular network node for transmission to the UE.
  • the network node may have a communication interface and processing circuitry.
  • the processing circuitry of the network node may be configured to perform the following operations to transmit the user data from the host to the UE.
  • the processing circuitry of the network node may be configured to schedule, for a first terminal device whose capability of whether supporting FDM of a first Wegiebolaget LM Ericsson (publ) - 61 - 30A-162143 physical channel for transmitting traffic data and a second physical channel for transmitting control information is unknown to the network node, one or more transmissions each using the first physical channel that is multiplexed with the second physical channel in an FDM manner.
  • the processing circuitry of the network node may be configured to perform the one or more transmissions to the first terminal device, based on the scheduling.
  • the processing circuitry of the network node may be configured to receive, from the first terminal device, one or more reception feedbacks on the one or more transmissions.
  • the processing circuitry of the network node may be configured to determine whether the first terminal device supports FDM of the first and second physical channels, based on the one or more reception feedbacks.
  • the communication system may further comprise the network node; and/or the user equipment.
  • the processing circuitry of the host may be configured to execute a host application, thereby providing the user data.
  • the host application may be configured to interact with a client application executing on the UE.
  • the client application may be associated with the host application.
  • the method comprises: receiving, from a network device, a first indication indicating system information to be changed; receiving, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration; and updating an existing measurement configuration based on the first measurement configuration.
  • the first indication is received from a serving cell of the terminal device, and the first measurement configuration is used for measuring one or more cells.
  • the terminal device is in a radio resource control connected state.
  • the first indication comprises identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or the first indication indicates that a Konaktiebolaget LM Ericsson (publ) - 62 - 30A-162143 purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state.
  • the system information comprises a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state.
  • receiving the system information comprises receiving the first measurement configuration upon receiving the first indication indicating the system information to be changed.
  • receiving the first indication comprises: receiving the first indication indicating the system information to be changed in a modification period; and receiving the system information comprises: receiving the system information comprising the first measurement configuration in a subsequent modification period.
  • the method comprises receiving a second measurement configuration via a dedicated signaling in the modification period; and skipping receiving the system information in the subsequent modification period.
  • the method comprises monitoring the first indication indicating the system information to be changed in at least one paging occasion per modification period.
  • the method comprises in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state, removing the first measurement configuration; and in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state that is configured with measurement during the radio resource control release procedure, continuing to apply the first measurement configuration.
  • the terminal device is in a radio resource control idle state or in inactive state; and the terminal device is configured with a SSB measurement during a radio resource control release procedure.
  • the system information further indicates a validity area for the first measurement configuration.
  • the method comprises in response to that Konaktiebolaget LM Ericsson (publ) - 63 - 30A-162143 the terminal device enters a cell that does not belong to the validity area, removing the first measurement configuration.
  • the system information further indicates expiry time for the first measurement configuration.
  • the method comprises determining whether the expiry time is elapsed; and in response to that the expiry time is elapsed, removing the first measurement configuration.
  • the expiry time is indicated by one of: absolute time or a time duration.
  • the method comprises starting a validity timer with the expiry time upon the reception of the system information.
  • the terminal device is configured with a maximum duration for reading the system information that comprises the first measurement configuration.
  • the method further comprises starting a timer associated with reading the system information upon the reception of the first indication; or starting a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs.
  • the first indication is a SIB modification indication transmitted in a paging message or downlink control information.
  • the method comprises transmitting, to the network device, feedback information indicating whether the first measurement configuration is successfully applied.
  • updating the existing measurement configuration comprises at least one of: an addition or removal of a cell from a list of excluded cells, stopping a timer that is running associated with the cell, or an addition or removal of the cell to a conditional handover related configuration.
  • the first measurement configuration comprises at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells.
  • the method comprises transmitting, to at least one terminal device, a first indication indicating system information to be changed; and transmitting, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device.
  • the at least one terminal device comprises one terminal device or more than one terminal device.
  • the first indication is transmitted in a serving cell of the at last one terminal device, and the first measurement configuration is used for one or more cells.
  • the at least one terminal device is in a radio resource control connected state.
  • the first indication comprises identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or the first indication indicates that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state.
  • the system information comprises a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state.
  • transmitting the first indication comprises: transmitting the first indication indicating the system information to be changed in a modification period.
  • transmitting the system information comprises transmitting the system information comprising the first measurement configuration in a subsequent modification period.
  • the method comprises transmitting, to the at least one terminal device, a second measurement configuration via a dedicated signaling in the modification period.
  • the method comprises transmitting, to the at least one terminal device, the first indication indicating the system information to be changed in at least one paging occasion per modification period.
  • the at least one terminal device is a radio resource control idle state or in inactive state; and the at least one terminal device is configured with a synchronization signal block (SSB) measurement during a radio resource control release procedure.
  • the system information further indicates a validity area for the first measurement configuration.
  • the system information further indicates expiry time for the first measurement configuration.
  • the expiry time is indicated by one of: absolute time or a time duration.
  • the first indication is a SIB modification indication transmitted in a paging message or downlink control information.
  • the method comprises receiving, from the at least one terminal device, feedback information indicating whether the first measurement configuration is successfully applied.
  • the method comprises transmitting, to the at least one terminal device, a second indication for releasing the first measurement configuration.
  • the first measurement configuration comprises at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells.
  • the various exemplary embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • the exemplary embodiments of the disclosure may be practiced in various components such as integrated circuit chips and modules. It should thus be appreciated that the exemplary embodiments of this disclosure may be realized in an apparatus that is embodied as an integrated circuit, where the integrated circuit may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor, a digital signal processor, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this disclosure. [00262] It should be appreciated that at least some aspects of the exemplary embodiments of the disclosure may be embodied in computer-executable instructions, such as in one or more program modules, executed by one or more computers or other devices.
  • program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types when executed by a processor in a computer or other device.
  • the computer executable instructions may be stored on a computer readable medium such as a hard disk, optical disk, removable storage media, solid state memory, RAM, etc.
  • a computer readable medium such as a hard disk, optical disk, removable storage media, solid state memory, RAM, etc.
  • the function of the program modules may be combined or distributed as desired in various embodiments.
  • the function may be embodied in whole or in part in firmware or hardware equivalents such as integrated circuits, field programmable gate arrays (FPGA), and the like.

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Abstract

Method and apparatus for measurement configuration for updating measurement configuration are disclosed. According to an embodiment, the terminal device receives, from a network device, a first indication indicating system information to be changed. The terminal device also receives the system information indicated to be changed by the first indication from the network device via a broadcast signaling. The system information comprises a first measurement configuration. The terminal device updates an existing measurement configuration based on the first measurement configuration. In this way, it can reduce signaling cost.

Description

Telefonaktiebolaget LM Ericsson (publ) - 1 - 30A-162143 METHODS AND APPARATUSES FOR UPDATING MEASUREMENT CONFIGURATION Technical Field [0001] Embodiments of the represent disclosure relate to the field of telecommunication and in particular, to methods, devices, apparatuses and computer readable storage medium for updating a measurement configuration. Background [0002] This section introduces aspects that may facilitate better understanding of the present disclosure. Accordingly, the statements of this section are to be read in this light and are not to be understood as admissions about what is in the prior art or what is not in the prior art. [0003] Measurements can help a terminal device and a network make decisions so that resources can be managed better and ultimately quality of service is ensured. The measurement for a terminal device may be configured according to clause 5 at 3rd generation partner project (3GPP) technical specification (TS) 38.331 V15.0.0 (published on 2018-01). For example, a network may configure the terminal device to perform measurements. The network may also configure the terminal device to report them in accordance with the measurement configuration or perform conditional reconfiguration evaluation in accordance with the conditional reconfiguration. The measurement configuration may be provided by means for dedicated signaling. Further, the measurement configuration needs to be updated in some situations. For example, if a cell is power off, a measurement configuration related to the cell may be changed. Therefore, how to properly update the measurement configuration is worth studying. Summary [0004] This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. [0005] One of the objects of the disclosure is to provide an improved solution for updating a measurement configuration. In particular, one of the problems to be solved by the disclosure is that signaling cost for updating the measurement configuration for a number of terminal devices may be huge in the existing solution. Telefonaktiebolaget LM Ericsson (publ) - 2 - 30A-162143 [0006] According to a first aspect of the disclosure, a method implemented by a terminal device for communication is provided. The terminal device may receive from a network device a first indication indicating system information to be changed. The terminal device may also receive the system information indicated to be changed by the first indication from the network device via a broadcast signaling. The system information may comprise a first measurement configuration. The terminal device may update an existing measurement configuration based on the first measurement configuration. In this way, by receiving an indication on change of system information via broadcast signaling, it can reduce signaling cost in comparison to dedicated signaling, especially for the case that the same measurement configuration update is for multiple terminal devices. [0007] In an embodiment, the first indication may be received from a serving cell of the terminal device, and the first measurement configuration may be used for measuring one or more cells. [0008] In an embodiment, the terminal device may be in a radio resource control connected state. Traditionally, measurement configuration update may usually be informed via dedicated signaling to terminal devices in a radio resource control connected state. However, in this embodiment, for the case that there are multiple terminal devices in radio resource control connected state of which measurement configurations need to be updated with the same information at the same time, signaling cost can be reduced significantly via broadcast in comparison to dedicated signaling for every terminal device. [0009] In an embodiment, the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. [0010] In an embodiment, the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. In this way, the existing SIB can be reused. Telefonaktiebolaget LM Ericsson (publ) - 3 - 30A-162143 [0011] In an embodiment, the terminal device may receive the first measurement configuration upon receiving the first indication indicating the system information to be changed. [0012] In an embodiment, the terminal device may receive the first indication indicating the system information to be changed in a modification period. The terminal device may also receive the system information comprising the first measurement configuration in a subsequent modification period. [0013] In an embodiment, the terminal device may receive a second measurement configuration via a dedicated signaling in the modification period. The terminal device may skip receiving the system information in the subsequent modification period. [0014] In an embodiment, the terminal device may monitor the first indication indicating the system information to be changed in at least one paging occasion per modification period. [0015] In an embodiment, if the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state, the terminal device may remove the first measurement configuration. In an embodiment, if the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state that is configured with measurement during the radio resource control release procedure, the terminal device may continue to apply the first measurement configuration. [0016] In an embodiment, the terminal device may be in a radio resource control idle state or in inactive state. The terminal device may be configured with a SSB measurement during a radio resource control release procedure. [0017] In an embodiment, the system information may further indicate a validity area for the first measurement configuration. In this case, if the terminal device enters a cell that does not belong to the validity area, the terminal device may remove the first measurement configuration. In this way, it can reduce effort of readying SIBs and save power. [0018] In an embodiment, the system information may further indicate expiry time for the first measurement configuration. In this case, if the expiry time is elapsed, the terminal device may remove the first measurement configuration. In this way, it can avoid applying the first measurement configuration in a changed cell situation. Telefonaktiebolaget LM Ericsson (publ) - 4 - 30A-162143 [0019] In an embodiment, the expiry time may be indicated by one of: absolute time or a time duration. [0020] In an embodiment, the terminal device may start a validity timer with the expiry time upon the reception of the system information. [0021] In an embodiment, the terminal device may be configured with a maximum duration for reading the system information that comprises the first measurement configuration. In this case, the terminal device may start a timer associated with reading the system information upon the reception of the first indication. Alternatively, the terminal device may start a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs. [0022] In an embodiment, the terminal device may transmit, to the network device, feedback information indicating whether the first measurement configuration is successfully applied. In this way, the network device can know whether the first measurement configuration is successfully applied. [0023] In an embodiment, the first indication may be a SIB modification indication transmitted in a paging message or downlink control information. [0024] In an embodiment, the terminal device may receive, from the network device, a second indication for releasing the first measurement configuration and releases the first measurement configuration based on the second indication. In this way, the network can determine to release the first measurement configuration based on the cell situation. [0025] In an embodiment, the terminal device may transmit, to the network device, feedback information indicating whether the first measurement configuration is successfully applied. [0026] In an embodiment, updating the existing measurement configuration may comprise at least one of: an addition or removal of a cell from a list of excluded cells, stopping a timer that is running associated with the cell, or an addition or removal of the cell to a conditional handover related configuration. [0027] In an embodiment, the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. Telefonaktiebolaget LM Ericsson (publ) - 5 - 30A-162143 [0028] According to a second aspect of the disclosure, a method implemented by a network device for communication is provided. The network device may transmit, to at least one a terminal device, a first indication indicating system information to be changed. The network device may transmit the system information indicated to be changed by the first indication to the at least one terminal device via a broadcast signaling. The system information may comprise a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. In this way, by transmitting an indication on change of system information via broadcast signaling, it can reduce signaling cost in comparison to dedicated signaling, especially for the case that the same measurement configuration update is for multiple terminal devices. [0029] In an embodiment, the at least one terminal device comprises one terminal device or a plurality of terminal devices. [0030] In an embodiment, the first indication may be transmitted in a serving cell of the terminal device, and the first measurement configuration may be used for one or more cells. [0031] In an embodiment, the at least one terminal device may be in a radio resource control connected state. Traditionally, measurement configuration update may usually be informed via dedicated signaling to terminal devices in a radio resource control connected state. However, in this embodiment, for the case that there are multiple terminal devices in radio resource control connected state of which measurement configurations need to be updated with the same information at the same time, signaling cost can be reduced significantly via broadcast in comparison to dedicated signaling for every terminal device. [0032] In an embodiment, the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state. Alternatively, the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. [0033] In an embodiment, the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. In this way, the existing SIB can be reused. Telefonaktiebolaget LM Ericsson (publ) - 6 - 30A-162143 [0034] In an embodiment, the network device may transmit the first indication indicating the system information to be changed in a modification period. In an embodiment, the network device may transmit the system information comprising the first measurement configuration in a subsequent modification period. [0035] In an embodiment, the network device may transmit to the at least one terminal device, a second measurement configuration via a dedicated signaling in the modification period. [0036] In an embodiment, the network device may transmit to the at least one terminal device, the first indication indicating the system information to be changed in at least one paging occasion per modification period. [0037] In an embodiment, the at least one terminal device is a radio resource control idle state or in inactive state; and the at least one terminal device is configured with a synchronization signal block (SSB) measurement during a radio resource control release procedure. [0038] In an embodiment, the system information may further indicate a validity area for the first measurement configuration. In this way, it can reduce effort of readying SIBs and save power. [0039] In an embodiment, the system information may further indicate expiry time for the first measurement configuration. In this way, it can avoid applying the first measurement configuration in a changed cell situation. [0040] In an embodiment, the expiry time may be indicated by one of: absolute time or a time duration. [0041] In an embodiment, the first indication may be a SIB modification indication transmitted in a paging message or downlink control information. [0042] In an embodiment, the network device may receive from the at least one terminal device, feedback information indicating whether the first measurement configuration is successfully applied. In this way, the network device can know whether the first measurement configuration is successfully applied. Telefonaktiebolaget LM Ericsson (publ) - 7 - 30A-162143 [0043] In an embodiment, the network device may transmit to the at least one terminal device, a second indication for releasing the first measurement configuration. In this way, the network device can determine to release the first measurement configuration based on the cell situation. [0044] In an embodiment, the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. [0045] According to a third aspect of the disclosure, a terminal device is provided. The terminal device may comprise: a processor and a memory, said memory containing instructions executable by said processor whereby said terminal device is operative to perform receiving, from a network device, a first indication indicating system information to be changed. The terminal device may be also operative to perform receiving, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication. The system information may comprise a first measurement configuration. The terminal device may further be operative to perform updating an existing measurement configuration based on the first measurement configuration. [0046] According to a fourth aspect of the disclosure, a network device is provided. The network device may comprise: a processor and a memory, said memory containing instructions executable by said processor whereby said network device is operative to perform transmitting, to at least one terminal device, a first indication indicating system information to be changed. The network device may be operative to perform transmitting, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication. The system information may comprise a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. [0047] According to a fifth aspect of the disclosure, there is provided a method implemented in a communication system including a terminal device and a network device. The method may comprise steps of the method according to the above first and second aspect. [0048] According to a sixth aspect of the disclosure, there is provided a communication system including a terminal device according to the above third aspect and a network device according to the above fourth aspect. Telefonaktiebolaget LM Ericsson (publ) - 8 - 30A-162143 [0049] According to a seventh aspect of the disclosure, a computer program product is provided. The computer program product may comprise instructions, which, when executed on at least one processor, cause the at least one processor to carry out the method above, as performed by the terminal device or the network device, respectively. [0050] According to an eight aspect of the disclosure, an apparatus is provided. The apparatus may comprise a transceiver module that is configured to receive, from a network device, a first indication indicating system information to be changed. The transceiver module is also configured to receive, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication. The system information may comprise a first measurement configuration. The apparatus may also comprise a processing module that is configured to update an existing measurement configuration based on the first measurement configuration. [0051] According to a ninth aspect of the disclosure, an apparatus is provided. The apparatus may comprise a transceiver module that is configured to transmit, to at least one terminal device, a first indication indicating system information to be changed. The transceiver module may also be configured to transmit, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication. The system information may comprise a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. Brief Description of the Drawings [0052] These and other objects, features and advantages of the disclosure will become apparent from the following detailed description of illustrative embodiments thereof, which are to be read in connection with the accompanying drawings. [0053] FIG.1 shows a communication system in accordance with some embodiments; [0054] FIG. 2 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments; [0055] FIG. 3 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments; Telefonaktiebolaget LM Ericsson (publ) - 9 - 30A-162143 [0056] FIG. 4 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments; [0057] FIG. 5 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments; [0058] FIG. 6 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments; [0059] FIG. 7 illustrates a signaling diagram of measurement configuration update in accordance with some embodiments; [0060] FIG. 8 is a flowchart of a method implemented by a terminal device in accordance with an embodiment of the present disclosure; [0061] FIG. 9 is a flowchart of a method implemented by a network device in accordance with an embodiment of the present disclosure; [0062] FIG. 10 is a flowchart of a method implemented by a network device in accordance with an embodiment of the present disclosure; [0063] FIG.11 is a block diagram showing an apparatus suitable for use in practicing some embodiments of the present disclosure; [0064] FIG. 12A shows a block diagram showing a terminal device suitable for use in practicing some embodiments of the present disclosure and FIG.12B shows a block diagram showing a network device suitable for use in practicing some embodiments of the present disclosure; [0065] FIG. 13 shows an example of a communication system in accordance with some embodiments; [0066] FIG.14 shows a block diagram of a host in accordance with some embodiments; and [0067] FIG.15 shows a communication diagram of a host communicating via a network node with a user equipment (UE) over a partially wireless connection in accordance with some embodiments. Telefonaktiebolaget LM Ericsson (publ) - 10 - 30A-162143 [0068] Throughout the drawings, the same or similar reference numerals represent the same or similar element. Detailed Description [0069] For the purpose of explanation, details are set forth in the following description in order to provide a thorough understanding of the embodiments disclosed. It is apparent, however, to those skilled in the art that the embodiments may be implemented without these specific details or with an equivalent arrangement. [0070] Some of the embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. Other embodiments, however, are contained within the scope of the subject matter disclosed herein, the disclosed subject matter should not be construed as limited to only the embodiments set forth herein; rather, these embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art. [0071] Generally, all terms used herein are to be interpreted according to their ordinary meaning in the relevant technical field, unless a different meaning is clearly given and/or is implied from the context in which it is used. All references to a/an/the element, apparatus, component, means, step, etc. are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any methods disclosed herein do not have to be performed in the exact order disclosed, unless a step is explicitly described as following or preceding another step and/or where it is implicit that a step must follow or precede another step. Any feature of any of the embodiments disclosed herein may be applied to any other embodiment, wherever appropriate. Likewise, any advantage of any of the embodiments may apply to any other embodiments, and vice versa. Other objectives, features and advantages of the enclosed embodiments will be apparent from the following description. [0072] Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present disclosure should be or are in any single embodiment of the disclosure. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present disclosure. Furthermore, the described features, Telefonaktiebolaget LM Ericsson (publ) - 11 - 30A-162143 advantages, and characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. One skilled in the relevant art will recognize that the disclosure may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the disclosure. [0073] As used herein, the terms “first”, “second” and so forth refer to different elements. The singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises”, “comprising”, “has”, “having”, “includes” and/or “including” as used herein, specify the presence of stated features, elements, and/or components and the like, but do not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof. The term “based on” is to be read as “based at least in part on”. The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment”. The term “another embodiment” is to be read as “at least one other embodiment”. Other definitions, explicit and implicit, may be included below. The term “one or more elements” used is to be read as “only one element” or “a plurality of elements”. The term “at least element” used is to be read as “only one element” or “more than one element”. [0074] As used herein, the term “terminal device”/ “communication device” may be any device intended for accessing services via an access network and configured to communicate over the access network. For instance, the terminal device/communication device may be, but is not limited to: mobile phone, smart phone, sensor device, meter, vehicle, household appliance, medical appliance, media player, camera, or any type of consumer electronic, for instance, but not limited to, television, radio, lighting arrangement, tablet computer, laptop, or PC. The terminal device/communication device may be a portable, pocket storable, hand- held, computer-comprised, or vehicle-mounted mobile device, enabled to communicate voice and/or data, via a wireless or wireline connection. The term “terminal device” may be referred to as a mobile station (MT). Alternatively, the term “terminal device” may be referred to as a user equipment (UE). The terms “terminal device” and “UE” can be used interchangeable hereinafter. [0075] The term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom. The network device may refer to a base station (BS) or an access point (AP), for example, a node B (NodeB or Telefonaktiebolaget LM Ericsson (publ) - 12 - 30A-162143 NB), an evolved NodeB (eNodeB or eNB), an NR NB (also referred to as a gNB), a Remote Radio Unit (RRU), a radio header (RH), a remote radio head (RRH), a relay, an Integrated Access and Backhaul (IAB) node, a low power node such as a femto, a pico, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device, and so forth, depending on the applied terminology and technology. [0076] A used herein, the term “RRC connected state” or “RRC connected mode” used herein may refer to a state in which service radio bearer and data radio bearer are allocated for the terminal device. The term “RRC idle state” or “RRC idle mode” used herein may refer to a state where the terminal device is switched on but does not have any established RRC connection. The term “RRC inactive state” or “RRC inactive mode” used herein may refer to a state where there is an RRC connection that has been suspended. Each RRC states herein follows the definition described in clause 4.2.1 at 3GPP TS 38.331 V15.0. (published on 2018-01). The term “broadcast signaling” may refer to a signaling that is transmitted on a broadcast channel (BCH). The term “RRC connected UE” or “RRC connected terminal device” used herein may refer to a UE or terminal device that is in the RRC connected state. The term “RRC inactive UE” or “RRC inactive terminal device” used herein may refer to a UE or terminal device that is in the RRC inactive state. The term “RRC idle UE” or “RRC idle terminal device” used herein may refer to a UE or terminal device that is in the RRC idle state. [0077] As mentioned previously, the measurement configuration needs to be updated in some situations. For example, a cell can be locked due to various reasons, such as, a manual cell lock or unlock, a software (SW) upgrade, a case where a cell sets up gain automatically. During a cell locking process, it is common that an ongoing service will be stopped if a terminal device stays in a current cell. Thus, served terminal devices needs to be moved to another cell to continue its current ongoing data transmission or voice call. From a network point of view, in order to move a terminal device in the RRC idle or inactive state, a network device could broadcast a ‘cell barring’ in system information or a master information block (MIB) message. The term “cell barring” means to bar or block a cell. The MIB message may include system information transmitted on a broadcast channel. Then, the terminal device may reselect to another cell. A terminal device in the RRC connected state or RRC connected mode would be moved by handover mechanism if there is ongoing transmission/reception. Telefonaktiebolaget LM Ericsson (publ) - 13 - 30A-162143 [0078] It is possible that a RRC connected terminal device in a neighbor cell of a cell in a locking process would report measurement reports for the cell. However, the RRC connected terminal device may not be moved to the cell in the locking process by the network, even though the RRC connected terminal device reports that the cell in the locking process is good enough in term of reference signal receive power (RSRP)/ signal to interference plus noise ratio (SINR). In addition, the cell could not be added as Secondary cell (SCell) for carrier aggregation (CA)/dual connectivity (DC) or Primary secondary cell (PSCell) for DC as the cell will be shut down. [0079] The RRC connected terminal device would continuously report the measurement report for the cell in the locking process, unless the measurement for the cell in the locking process is de-configured by adding the cell into an information element “excludedCellsToAddModList”. The term “excludedCellsToAddModList” used herein may refer to an information element (IE) that indicates a list of cells to add or modify in a list of exclude-listed cells. The list of exclude-listed cells may not be applicable or may not be considered in an event evaluation or measurement report. This would waste radio resources. Moreover, if the network device wants to configure the cell in the locking process in the excludedCellsToAddModList to many RRC connected terminal devices, it puts burden to a baseband and wastes lots of radio resources. This overhead increases as the number of RRC connected terminal devices increases in a cell. [0080] According to embodiments of the present disclosure, a measurement confirmation is transmitted in a broadcast manner and the existing measurement configuration stored at a terminal device is modified based on the measurement configuration. This can reduce cost which is raised due to signaling the same information to many RRC connected terminal devices via dedicated signaling and a burden in the radio access network (RAN) node. [0081] FIG.1 illustrates a communication system 100 in which embodiments of the present disclosure can be implemented. As shown in FIG.1, the communication system 100 includes a network device 120. The communication system 100 also includes a terminal device 110- 1, a terminal device 110-2, ... , a terminal device 110-N (collectively referred to as “terminal device(s) 110”), where N is an integer number. The terminal device 110 is currently served by a cell 101. Optionally, cells 102 and 103 are neighbor cells of the cell 101. Telefonaktiebolaget LM Ericsson (publ) - 14 - 30A-162143 [0082] It can be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication system 100 may include any suitable number of devices configured to implementing embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional terminal devices may be located in the cell 101, and one or more additional cells may be deployed in the communication system 100. [0083] In some embodiments, a channel from the network device 120 to the terminal device 110 is referred to as a downlink (DL), while a channel from the terminal device 110 to the network device 120 is referred to as an uplink (UL). In the DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver). In the UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver). [0084] Communications in the communication system 100 may be implemented according to any proper communication protocol(s), comprising, but not limited to, cellular communication protocols of the first generation (1G), the second generation (2G), the third generation (3G), the fourth generation (4G), the fifth generation (5G), the sixth generation (6G), and the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Frequency Division Duplex (FDD), Time Division Duplex (TDD), Multiple-Input Multiple-Output (MIMO), Orthogonal Frequency Division Multiple (OFDM), Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and/or any other technologies currently known or to be developed in the future. [0085] If the terminal device 110 is in a RRC connected state, the network device 120 may configure the terminal device 110 to perform a measurement. The network device 120 may configure the terminal device 110 to report the measurement in accordance with a measurement configuration or perform a conditional reconfiguration evaluation in accordance with a conditional reconfiguration. The measurement configuration is provided by means of a dedicated signaling, i.e., using a RRC reconfiguration message or a RRC resume message. Telefonaktiebolaget LM Ericsson (publ) - 15 - 30A-162143 [0086] With respect to the measurement, related contents from clause 5.5.1 at 3GPP TS 38.331 V15.0.0 (published on 2018-01) are as follows: A network may configure a UE to perform the following types of measurements: - NR measurements; - Inter-radio access technology (RAT) measurements of evolved-universal terrestrial radio access (E-UTRA) frequencies. - Inter-RAT measurements of universal terrestrial radio access-frequency division duplex (UTRA-FDD) frequencies. The network may configure the UE to report the following measurement information based on synchronization signal/physical broadcast channel (SS/PBCH) block(s): - Measurement results per SS/PBCH block; - Measurement results per cell based on SS/PBCH block(s); - SS/PBCH block(s) indexes. The network may configure the UE to report the following measurement information based on channel state information-reference signal (CSI-RS) resources: - Measurement results per CSI-RS resource; - Measurement results per cell based on CSI-RS resource(s); - CSI-RS resource measurement identifiers. The network may configure the UE to perform the following types of measurements for NR sidelink and vehicle to everything (V2X) sidelink: - Channel busy ratio (CBR) measurements. The network may configure the UE to report the following cross link interference (CLI) measurement information based on SRS resources: - Measurement results per SRS resource; - Sounding reference signal (SRS) resource(s) indexes. The network may configure the UE to report the following CLI measurement information based on CLI- received signal strength indication (RSSI) resources: - Measurement results per CLI-RSSI resource; - CLI-RSSI resource(s) indexes. The measurement configuration includes the following parameters: 1. Measurement objects: A list of objects on which the UE shall perform the measurements. - For intra-frequency and inter-frequency measurements a measurement object indicates the frequency/time location and subcarrier spacing of reference signals to Telefonaktiebolaget LM Ericsson (publ) - 16 - 30A-162143 be measured. Associated with this measurement object, the network may configure a list of cell specific offsets, a list of 'excludedlisted' cells and a list of 'whitelisted' cells. Excludedlisted cells are not applicable in event evaluation or measurement reporting. Whitelisted cells are the only ones applicable in event evaluation or measurement reporting. - The measObjectId of the measurement object (MO) which corresponds to each serving cell is indicated by servingCellMO within the serving cell configuration. - For inter-RAT E-UTRA measurements a measurement object is a single E-UTRA carrier frequency. Associated with this E-UTRA carrier frequency, the network can configure a list of cell specific offsets and a list of 'excludedlisted' cells. Excludedlisted cells are not applicable in event evaluation or measurement reporting. - For inter-RAT UTRA-FDD measurements a measurement object is a set of cells on a single UTRA-FDD carrier frequency. - For CBR measurement of NR sidelink communication, a measurement object is a set of transmission resource pool(s) on a single carrier frequency for NR sidelink communication. - For CLI measurements a measurement object indicates the frequency/time location of SRS resources and/or CLI-RSSI resources, and subcarrier spacing of SRS resources to be measured. 2. Reporting configurations: A list of reporting configurations where there can be one or multiple reporting configurations per measurement object. Each measurement reporting configuration consists of the following: - Reporting criterion: The criterion that triggers the UE to send a measurement report. This can either be periodical or a single event description. - Reference signal (RS) type: The RS that the UE uses for beam and cell measurement results (SS/PBCH block or CSI-RS). - Reporting format: The quantities per cell and per beam that the UE includes in the measurement report (e.g. RSRP) and other associated information such as the maximum number of cells and the maximum number beams per cell to report. In case of conditional reconfiguration, each configuration consists of the following: - Execution criteria: The criteria the UE uses for conditional reconfiguration execution. - RS type: The RS that the UE uses for obtaining beam and cell measurement results (SS/PBCH block-based or CSI-RS-based), used for evaluating conditional reconfiguration execution condition. 3. Measurement identities: For measurement reporting, a list of measurement identities where each measurement identity links one measurement object with one reporting configuration. By configuring multiple measurement identities, it is possible to link more than one measurement object to the same reporting configuration, as well as to link more than one reporting configuration to the same measurement object. The measurement identity is also included in the measurement report that Telefonaktiebolaget LM Ericsson (publ) - 17 - 30A-162143 triggered the reporting, serving as a reference to the network. For conditional reconfiguration triggering, one measurement identity links to exactly one conditional reconfiguration trigger configuration. And up to 2 measurement identities can be linked to one conditional reconfiguration execution condition. 4. Quantity configurations: The quantity configuration defines the measurement filtering configuration used for all event evaluation and related reporting, and for periodical reporting of that measurement. For NR measurements, the network may configure up to 2 quantity configurations with a reference in the NR measurement object to the configuration that is to be used. In each configuration, different filter coefficients can be configured for different measurement quantities, for different RS types, and for measurements per cell and per beam. 5. Measurement gaps: Periods that the UE may use to perform measurements. A UE in a RRC_connected state maintains a measurement object list, a reporting configuration list, and a measurement identities list according to signalling and procedures in this specification. The measurement object list possibly includes NR measurement object(s), CLI measurement object(s) and inter-RAT objects. Similarly, the reporting configuration list includes NR and inter-RAT reporting configurations. Any measurement object can be linked to any reporting configuration of the same RAT type. Some reporting configurations may not be linked to a measurement object. Likewise, some measurement objects may not be linked to a reporting configuration. The measurement procedures distinguish the following types of cells: 1. The NR serving cell(s) – these are the SpCell and one or more SCells. 2. Listed cells – these are cells listed within the measurement object(s). 3. Detected cells – these are cells that are not listed within the measurement object(s) but are detected by the UE on the SSB frequency(ies) and subcarrier spacing(s) indicated by the measurement object(s). For NR measurement object(s), the UE measures and reports on the serving cell(s), listed cells and/or detected cells. For inter-RAT measurements object(s) of E-UTRA, the UE measures and reports on listed cells and detected cells and, for RSSI and channel occupancy measurements, the UE measures and reports on the configured resources on the indicated frequency. For inter-RAT measurements object(s) of UTRA-FDD, the UE measures and reports on listed cells. For CLI measurement object(s), the UE measures and reports on configured measurement resources (i.e. SRS resources and/or CLI-RSSI resources). Whenever the procedural specification, other than contained in sub-clause 5.5.2, refers to a field it concerns a field included in the VarMeasConfig unless explicitly stated otherwise i.e. only the measurement configuration procedure covers the direct UE action related to the received measConfig. In NR-DC, the UE may receive two independent measConfig: - a measConfig, associated with master cell group (MCG), that is included in the RRCReconfiguration message received via signaling radio bearer (SRB)1; and - a measConfig, associated with secondary cell group (SCG), that is included in the RRCReconfiguration message received via SRB3, or, alternatively, included within a Telefonaktiebolaget LM Ericsson (publ) - 18 - 30A-162143 RRCReconfiguration message embedded in a RRCReconfiguration message received via SRB1. In this case, the UE maintains two independent VarMeasConfig and VarMeasReportList, one associated with each measConfig, and independently performs all the procedures in clause 5.5 for each measConfig and the associated VarMeasConfig and VarMeasReportList, unless explicitly stated otherwise. The configurations related to CBR measurements are only included in the measConfig associated with MCG. ASN.1 of the measurement configuration via dedicated signalling is like below. 2.1.1.1 – MeasConfig The IE MeasConfig specifies measurements to be performed by the UE, and covers intra- frequency, inter-frequency and inter-RAT mobility as well as configuration of measurement gaps. MeasConfig information element -- ASN1START -- TAG-MEASCONFIG-START MeasConfig ::= SEQUENCE { measObjectToRemoveList MeasObjectToRemoveList OPTIONAL, -- Need N measObjectToAddModList MeasObjectToAddModList OPTIONAL, -- Need N reportConfigToRemoveList ReportConfigToRemoveList OPTIONAL, -- Need N reportConfigToAddModList ReportConfigToAddModList OPTIONAL, -- Need N measIdToRemoveList MeasIdToRemoveList OPTIONAL, -- Need N measIdToAddModList MeasIdToAddModList OPTIONAL, -- Need N s-MeasureConfig CHOICE { ssb-RSRP RSRP-Range, csi-RSRP RSRP-Range } OPTIONAL, -- Need M quantityConfig QuantityConfig OPTIONAL, -- Need M measGapConfig MeasGapConfig OPTIONAL, -- Need M Telefonaktiebolaget LM Ericsson (publ) - 19 - 30A-162143 measGapSharingConfig MeasGapSharingConfig OPTIONAL, -- Need M ..., [[ interFrequencyConfig-NoGap-r16 ENUMERATED {true} OPTIONAL -- Need R ]] } MeasObjectToRemoveList ::= SEQUENCE (SIZE (1..maxNrofObjectId)) OF MeasObjectId MeasIdToRemoveList ::= SEQUENCE (SIZE (1..maxNrofMeasId)) OF MeasId ReportConfigToRemoveList ::= SEQUENCE (SIZE (1..maxReportConfigId)) OF ReportConfigId -- TAG-MEASCONFIG-STOP -- ASN1STOP
Telefonaktiebolaget LM Ericsson (publ) - 20 - 30A-162143 MeasConfig field descriptions interFrequencyConfig-NoGap-r16 If the field is set to true, UE is configured to perform SSB based inter-frequency measurement without measurement gaps when the inter-frequency SSB is completely contained in the active downlink (DL) bandwidth part (BWP) of the UE, as specified in TS 38.133 [14], clause 9.3. Otherwise, the SSB based inter-frequency measurement is performed within measurement gaps. In NR-DC, the field can only be configured in the measConfig associated with MCG, and when configured, it applies to all the inter-frequency measurements configured by MN and SN. measGapConfig Used to setup and release measurement gaps in NR. measIdToAddModList List of measurement identities to add and/or modify. measIdToRemoveList List of measurement identities to remove. measObjectToAddModList List of measurement objects to add and/or modify. measObjectToRemoveList List of measurement objects to remove. reportConfigToAddModList List of measurement reporting configurations to add and/or modify. reportConfigToRemoveList List of measurement reporting configurations to remove. s-MeasureConfig Threshold for NR SpCell RSRP measurement controlling when the UE is required to perform measurements on non-serving cells. Choice of ssb-RSRP corresponds to cell RSRP based on SS/PBCH block and choice of csi-RSRP corresponds to cell RSRP of CSI-RS. measGapSharingConfig Specifies the measurement gap sharing scheme and controls setup/ release of measurement gap sharing. [0087] The network device 120 may broadcast system information to the terminal device 110. The system information can be broadcasted to a group of terminal devices. With respect to system information, related contents from clause 5.2 at 3GPP TS 38.331 V15.0.0 (published on 2018-01) are as follows. 5.2 System information 5.2.1 Introduction System Information (SI) is divided into the MIB and a number of SIBs and posSIBs where: - the MIB is always transmitted on the BCH with a periodicity of 80 ms and repetitions made within 80 ms (TS 38.212 [17], clause 7.1) and it includes parameters that are needed to acquire SIB1 from the cell. The first transmission of the MIB is scheduled in subframes as defined in TS 38.213 [13], clause 4.1 and repetitions are scheduled according to the period of SSB; - the SIB1 is transmitted on the downlink shared channel (DL-SCH) with a periodicity of 160 ms and variable transmission repetition periodicity within 160 ms as specified in TS 38.213 [13], clause 13. The default transmission repetition periodicity of SIB1 is 20 ms but the actual transmission repetition periodicity is up to network Telefonaktiebolaget LM Ericsson (publ) - 21 - 30A-162143 implementation. For SSB and control resource set (CORESET) multiplexing pattern 1, SIB1 repetition transmission period is 20 ms. For SSB and CORESET multiplexing pattern 2/3, SIB1 transmission repetition period is the same as the SSB period (TS 38.213 [13], clause 13). SIB1 includes information regarding the availability and scheduling (e.g. mapping of SIBs to SI message, periodicity, SI-window size) of other SIBs with an indication whether one or more SIBs are only provided on- demand and, in that case, the configuration needed by the UE to perform the SI request. SIB1 is cell-specific SIB; - SIBs other than SIB1 and posSIBs are carried in SystemInformation (SI) messages, which are transmitted on the DL-SCH. Only SIBs or posSIBs having the same periodicity can be mapped to the same SI message. SIBs and posSIBs are mapped to the different SI messages. Each SI message is transmitted within periodically occurring time domain windows (referred to as SI-windows with same length for all SI messages). Each SI message is associated with an SI-window and the SI-windows of different SI messages do not overlap. That is, within one SI-window only the corresponding SI message is transmitted. An SI message may be transmitted a number of times within the SI-window. Any SIB or posSIB except SIB1 can be configured to be cell specific or area specific, using an indication in SIB1. The cell specific SIB is applicable only within a cell that provides the SIB while the area specific SIB is applicable within an area referred to as SI area, which consists of one or several cells and is identified by systemInformationAreaID; - The mapping of SIBs to SI messages is configured in schedulingInfoList, while the mapping of posSIBs to SI messages is configured in posSchedulingInfoList. Each SIB is contained only in a single SI message. In the case of posSIB, a posSIB carrying global navigation satellite system (GNSS) Generic Assistance Data for different GNSS/satellite based augmentation system (SBAS) [49] is contained in different SI messages. Each SIB and posSIB, including a posSIB carrying GNSS Generic Assistance Data for one GNSS/SBAS, is contained at most once in that SI message; - For a UE in RRC_connected, the network can provide system information through dedicated signalling using the RRCReconfiguration message, e.g. if the UE has an active BWP with no common search space configured to monitor system information, paging, or upon request from the UE. - For PSCell and SCells, the network provides the required SI by dedicated signalling, i.e. within an RRCReconfiguration message. Nevertheless, the UE shall acquire MIB of the PSCell to get SFN timing of the SCG (which may be different from MCG). Upon change of relevant SI for SCell, the network releases and adds the concerned SCell. For PSCell, the required SI can only be changed with Reconfiguration with Sync. NOTE: The physical layer imposes a limit to the maximum size a SIB can take. The maximum SIB1 or SI message size is 2976 bits. 5.2.2 System information acquisition 5.2.2.1 General UE requirements The UE applies the SI acquisition procedure to acquire the access stratum (AS), non-access stratum (NAS)- and positioning assistance data information. The procedure applies to UEs in RRC_idle, in RRC_inactive and in RRC_connected. Telefonaktiebolaget LM Ericsson (publ) - 22 - 30A-162143 The UE in RRC_idle and RRC_inactive shall ensure having a valid version of (at least) the MIB, SIB1 through SIB4, SIB5 (if the UE supports E-UTRA), SIB11 (if the UE is configured for idle/inactive measurements), SIB12 (if UE is capable of NR sidelink communication and is configured by upper layers to receive or transmit NR sidelink communication), and SIB13, SIB14 (if UE is capable of V2X sidelink communication and is configured by upper layers to receive or transmit V2X sidelink communication). The UE shall ensure having a valid version of the posSIB requested by upper layers. 5.2.2.2 SIB validity and need to (re)-acquire SIB 5.2.2.2.1 SIB validity The UE shall apply the SI acquisition procedure as defined in clause 5.2.2.3 upon cell selection (e.g. upon power on), cell-reselection, return from out of coverage, after reconfiguration with sync completion, after entering the network from another RAT, upon receiving an indication that the system information has changed, upon receiving a PWS notification, upon receiving request (e.g., a positioning request) from upper layers; and whenever the UE does not have a valid version of a stored SIB or posSIB or a valid version of a requested SIB. When the UE acquires a MIB or a SIB1 or an SI message in a serving cell as described in clause 5.2.2.3, and if the UE stores the acquired SIB, then the UE shall store the associated areaScope, if present, the first public land mobile network (PLMN)-Identity in the PLMN- IdentityInfoList for non-NPN-only cells or the first non-public network (NPN) identity (standalone NPN (SNPN) identity in case of SNPN, or Public Network Integrated NPN (PNI-NPN) identity in case of PNI-NPN) in the NPN-IdentityInfoList for NPN-only cells, the cellIdentity, the systemInformationAreaID, if present, and the valueTag, if present, as indicated in the si-SchedulingInfo for the SIB. If the UE stores the acquired posSIB, then the UE shall store the associated areaScope, if present, the cellIdentity, the systemInformationAreaID, if present, the valueTag, if provided in assistanceDataSIB- Element, and the expirationTime if provided in assistanceDataSIB-Element. The UE may use a valid stored version of the SI except MIB, SIB1, SIB6, SIB7 or SIB8 e.g. after cell re- selection, upon return from out of coverage or after the reception of SI change indication. The valueTag and expirationTime for posSIB is optionally provided in assistanceDataSIB- Element, as specified in TS 37.355. NOTE: The storage and management of the stored SIBs in addition to the SIBs valid for the current serving cell is left to UE implementation. The UE shall: 1>delete any stored version of a SIB after 3 hours from the moment it was successfully confirmed as valid; 1>for each stored version of a SIB: 2>if the areaScope is associated and its value for the stored version of the SIB is the same as the value received in the si-SchedulingInfo for that SIB from the serving cell: 3> if the UE is NPN capable and the cell is an NPN-only cell: 4> if the first NPN identity included in the NPN-IdentityInfoList, the systemInformationAreaID and the valueTag that are included in the si- Telefonaktiebolaget LM Ericsson (publ) - 23 - 30A-162143 SchedulingInfo for the SIB received from the serving cell are identical to the NPN identity, the systemInformationAreaID and the valueTag associated with the stored version of that SIB: 5> consider the stored SIB as valid for the cell; 3>else if the first PLMN-Identity included in the PLMN-IdentityInfoList, the systemInformationAreaID and the valueTag that are included in the si- SchedulingInfo for the SIB received from the serving cell are identical to the PLMN-Identity, the systemInformationAreaID and the valueTag associated with the stored version of that SIB: 4>consider the stored SIB as valid for the cell; 2>if the areaScope is not present for the stored version of the SIB and the areaScope value is not included in the si-SchedulingInfo for that SIB from the serving cell: 3> if the UE is NPN capable and the cell is an NPN-only cell: 4> if the first NPN identity in the NPN-IdentityInfoList, the cellIdentity and valueTag that are included in the si-SchedulingInfo for the SIB received from the serving cell are identical to the NPN identity, the cellIdentity and the valueTag associated with the stored version of that SIB: 5> consider the stored SIB as valid for the cell; 3>else if the first PLMN-Identity in the PLMN-IdentityInfoList, the cellIdentity and valueTag that are included in the si-SchedulingInfo for the SIB received from the serving cell are identical to the PLMN-Identity, the cellIdentity and the valueTag associated with the stored version of that SIB: 4>consider the stored SIB as valid for the cell; 1>for each stored version of a posSIB: 2>if the areaScope is associated and its value for the stored version of the posSIB is the same as the value received in the posSIB-MappingInfo for that posSIB from the serving cell and the systemInformationAreaID included in the si-SchedulingInfo is identical to the systemInformationAreaID associated with the stored version of that posSIB: 3>if the valueTag (see TS 37.355 [49]) for the posSIB received from the serving cell is identical to the valueTag associated with the stored version of that posSIB; or if the expirationTime (see TS 37.355 [49]) associated with the stored posSIB has not been expired: 4>consider the stored posSIB as valid for the cell; 2> if the areaScope is not present for the stored version of the posSIB and the areaScope value is not included in the posSIB-MappingInfo for that posSIB from the serving cell and the cellIdentity for the posSIB received from the serving cell is identical to the cellIdentity associated with the stored version of that posSIB: 3>if the valueTag (see TS 37.355 [49]) for the posSIB received from the serving cell is identical to the valueTag associated with the stored version of that Telefonaktiebolaget LM Ericsson (publ) - 24 - 30A-162143 posSIB; or if the expirationTime (see TS 37.355 [49]) associated with the stored posSIB has not been expired: 4>consider the stored posSIB as valid for the cell; 5.2.2.2.2 SI change indication and public warning system (PWS) notification A modification period is used, i.e. updated SI message (other than SI message for earthquake & tsunami warning system (ETWS), commercial mobile alter system (CMAS) and positioning assistance data) is broadcasted in the modification period following the one where SI change indication is transmitted. The modification period boundaries are defined by system frame number (SFN) values for which SFN mod m = 0, where m is the number of radio frames comprising the modification period. The modification period is configured by system information. The UE receives indications about SI modifications and/or PWS notifications using Short Message transmitted with paging radio network temporary identifier (P-RNTI) over downlink control information (DCI) (see clause 6.5). Repetitions of SI change indication may occur within preceding modification period. SI change indication is not applicable for SI messages containing posSIBs. UEs in RRC_idle or in RRC_inactive shall monitor for SI change indication in its own paging occasion every discontinuous reception transmission (DRX) cycle. UEs in RRC_connected shall monitor for SI change indication in any paging occasion at least once per modification period if the UE is provided with common search space, including pagingSearchSpace, searchSpaceSIB1 and searchSpaceOtherSystemInformation, on the active BWP to monitor paging, as specified in TS 38.213 [13], clause 13. During a modification period where ETWS or CMAS transmission is started or stopped, the SI messages carrying the posSIBs scheduled in posSchedulingInfoList may change, so the UE might not be able to successfully receive those posSIBs in the remainder of the current modification period and next modification period according to the scheduling information received prior to the change. ETWS or CMAS capable UEs in RRC_idle or in RRC_inactive shall monitor for indications about PWS notification in its own paging occasion every DRX cycle. ETWS or CMAS capable UEs in RRC_connected shall monitor for indication about PWS notification in any paging occasion at least once every defaultPagingCycle if the UE is provided with common search space, including pagingSearchSpace, searchSpaceSIB1 and searchSpaceOtherSystemInformation, on the active BWP to monitor paging. For Short Message reception in a paging occasion, the UE monitors the physical downlink control channel (PDCCH) monitoring occasion(s) for paging as specified in TS 38.304 [20] and TS 38.213 [13]. If the UE receives a Short Message, the UE shall: 1> if the UE is ETWS capable or CMAS capable, the etwsAndCmasIndication bit of Short Message is set, and the UE is provided with searchSpaceSIB1 and searchSpaceOtherSystemInformation on the active BWP or the initial BWP: 2> immediately re-acquire the SIB1; 2>if the UE is ETWS capable and si-SchedulingInfo includes scheduling information for SIB6: 3>acquire SIB6, as specified in sub-clause 5.2.2.3.2, immediately; Telefonaktiebolaget LM Ericsson (publ) - 25 - 30A-162143 2>if the UE is ETWS capable and si-SchedulingInfo includes scheduling information for SIB7: 3>acquire SIB7, as specified in sub-clause 5.2.2.3.2, immediately; 2> if the UE is CMAS capable and si-SchedulingInfo includes scheduling information for SIB8: 3>acquire SIB8, as specified in sub-clause 5.2.2.3.2, immediately; NOTE: In case SIB6, SIB7, or SIB8 overlap with a measurement gap it is left to UE implementation how to immediately acquire SIB6, SIB7, or SIB8. 1> if the systemInfoModification bit of Short Message is set: 2>apply the SI acquisition procedure as defined in sub-clause 5.2.2.3 from the start of the next modification period. 5.2.2.3 Acquisition of System Information 5.2.2.3.1 Acquisition of MIB and SIB1 The UE shall: 1>apply the specified BCCH configuration defined in 9.1.1.1; 1>if the UE is in RRC_idle or in RRC_inactive; or 1>if the UE is in RRC_connected while T311 is running: 2>acquire the MIB, which is scheduled as specified in TS 38.213 [13]; 2> if the UE is unable to acquire the MIB; 3>perform the actions as specified in clause 5.2.2.5; 2>else: 3>perform the actions specified in clause 5.2.2.4.1. 1> if the UE is in RRC_ connected with an active BWP with common search space configured by searchSpaceSIB1 and pagingSearchSpace and has received an indication about change of system information; or 1>if the UE is in RRC_ connected with an active BWP with common search space configured by searchSpaceSIB1 and the UE has not stored a valid version of a SIB or posSIB, in accordance with sub-clause 5.2.2.2.1, of one or several required SIB(s) or posSIB(s) in accordance with sub-clause 5.2.2.1, and, UE has not acquired SIB1 in current modification period; or 1> if the UE is in RRC_ connected with an active BWP with common search space configured by searchSpaceSIB1, and, the UE has not stored a valid version of a SIB or posSIB, in accordance with sub-clause 5.2.2.2.1, of one or several required SIB(s) or posSIB(s) in accordance with sub-clause 5.2.2.1, and, si-BroadcastStatus for the required SIB(s) or posSI-BroadcastStatus for the required posSIB(s) is set to notbroadcasting in acquired SIB1 in current modification period; or 1>if the UE is in RRC_idle or in RRC_inactive; or Telefonaktiebolaget LM Ericsson (publ) - 26 - 30A-162143 1>if the UE is in RRC_ connected while T311 is running: 2>if ssb-SubcarrierOffset indicates SIB1 is transmitted in the cell (TS 38.213 [13]) and if SIB1 acquisition is required for the UE: 3>acquire the SIB1, which is scheduled as specified in TS 38.213 [13]; 3> if the UE is unable to acquire the SIB1: 4>perform the actions as specified in clause 5.2.2.5; 3>else: 4>upon acquiring SIB1, perform the actions specified in clause 5.2.2.4.2. 2>else if SIB1 acquisition is required for the UE and ssb-SubcarrierOffset indicates that SIB1 is not scheduled in the cell: 3>perform the actions as specified in clause 5.2.2.5. NOTE: The UE in RRC_CONNECTED is only required to acquire broadcasted SIB1 if the UE can acquire it without disrupting unicast data reception, i.e. the broadcast and unicast beams are quasi co-located. 5.2.2.3.2 Acquisition of an SI message For SI message acquisition PDCCH monitoring occasion(s) are determined according to searchSpaceOtherSystemInformation. If searchSpaceOtherSystemInformation is set to zero, PDCCH monitoring occasions for SI message reception in SI-window are same as PDCCH monitoring occasions for SIB1 where the mapping between PDCCH monitoring occasions and SSBs is specified in TS 38.213[13]. If searchSpaceOtherSystemInformation is not set to zero, PDCCH monitoring occasions for SI message are determined based on search space indicated by searchSpaceOtherSystemInformation. PDCCH monitoring occasions for SI message which are not overlapping with UL symbols (determined according to tdd-UL- DL-ConfigurationCommon) are sequentially numbered from one in the SI window. The [x×N+K]th PDCCH monitoring occasion (s) for SI message in SI-window corresponds to the Kth transmitted SSB, where x = 0, 1, ...X-1, K = 1, 2, …N, N is the number of actual transmitted SSBs determined according to ssb-PositionsInBurst in SIB1 and X is equal to CEIL(number of PDCCH monitoring occasions in SI-window/N). The actual transmitted SSBs are sequentially numbered from one in ascending order of their SSB indexes. The UE assumes that, in the SI window, PDCCH for an SI message is transmitted in at least one PDCCH monitoring occasion corresponding to each transmitted SSB and thus the selection of SSB for the reception SI messages is up to UE implementation. When acquiring an SI message, the UE shall: 1>determine the start of the SI-window for the concerned SI message as follows: 2>if the concerned SI message is configured in the schedulingInfoList: 3>for the concerned SI message, determine the number n which corresponds to the order of entry in the list of SI messages configured by schedulingInfoList in si- SchedulingInfo in SIB1; 3>determine the integer value x = (n – 1) × w, where w is the si-WindowLength; Telefonaktiebolaget LM Ericsson (publ) - 27 - 30A-162143 3>the SI-window starts at the slot #a, where a = x mod N, in the radio frame for which SFN mod T = FLOOR(x/N), where T is the si-Periodicity of the concerned SI message and N is the number of slots in a radio frame as specified in TS 38.213 [13]; 2>else if the concerned SI message is configured in the posSchedulingInfoList and offsetToSI-Used is not configured: 3>create a concatenated list of SI messages by appending the posSchedulingInfoList in posSI-SchedulingInfo in SIB1 to schedulingInfoList in si-SchedulingInfo in SIB1; 3>for the concerned SI message, determine the number n which corresponds to the order of entry in the concatenated list; 3>determine the integer value x = (n – 1) × w, where w is the si-WindowLength; 3> the SI-window starts at the slot #a, where a = x mod N, in the radio frame for which SFN mod T = FLOOR(x/N), where T is the posSI-Periodicity of the concerned SI message and N is the number of slots in a radio frame as specified in TS 38.213 [13]; 2>else if the concerned SI message is configured by the posSchedulingInfoList and offsetToSI-Used is configured: 3>determine the number m which corresponds to the number of SI messages with an associated si-Periodicity of 8 radio frames (80 ms), configured by schedulingInfoList in SIB1; 3>for the concerned SI message, determine the number n which corresponds to the order of entry in the list of SI messages configured by posSchedulingInfoList in SIB1; 3>determine the integer value x = m × w + (n – 1) × w, where w is the si- WindowLength; 3>the SI-window starts at the slot #a, where a = x mod N, in the radio frame for which SFN mod T = FLOOR(x/N) +8, where T is the posSI-Periodicity of the concerned SI message and N is the number of slots in a radio frame as specified in TS 38.213 [13]; 1>receive the PDCCH containing the scheduling RNTI, i.e. SI-RNTI in the PDCCH monitoring occasion(s) for SI message acquisition, from the start of the SI-window and continue until the end of the SI-window whose absolute length in time is given by si-WindowLength, or until the SI message was received; 1>if the SI message was not received by the end of the SI-window, repeat reception at the next SI-window occasion for the concerned SI message in the current modification period; NOTE 1: The UE is only required to acquire broadcasted SI message if the UE can acquire it without disrupting unicast data reception, i.e. the broadcast and unicast beams are quasi co-located. Telefonaktiebolaget LM Ericsson (publ) - 28 - 30A-162143 NOTE 2: The UE is not required to monitor PDCCH monitoring occasion(s) corresponding to each transmitted SSB in SI-window. NOTE 3: If the concerned SI message was not received in the current modification period, handling of SI message acquisition is left to UE implementation. NOTE 4: A UE in RRC_connected may stop the PDCCH monitoring during the SI window for the concerned SI message when the requested SIB(s) are acquired. NOTE 5: A UE capable of NR sidelink communication and configured by upper layers to perform NR sidelink communication on a frequency, may acquire SIB12 from a cell other than current serving cell (for RRC_inactive or RRC_idle) or current PCell (for RRC_connected), if SIB12 of current serving cell (for RRC_inactive or RRC_idle) or current PCell (for RRC_conncted) does not provide configuration for NR sidelink communication for the frequency, and if the other cell providing configuration for NR sidelink communication for the frequency meets the S-criteria as defined in TS 38.304 [20] and TS 36.304 [27]. 1> perform the actions for the acquired SI message as specified in sub-clause 5.2.2.4. [0088] Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Reference is now made to FIG.2, which shows a signaling chart 200 for communication according to some embodiments of the present disclosure. As shown in FIG.2, the signaling chart 200 involves a terminal device 210 and a network device 220. By way of example, the terminal device 210 may be implemented at the terminal device 110 or may be the terminal device 110. The network device 220 may be implemented at the network device 120 or may be the network device 120. [0089] The terminal device 210 and the network device 220 may perform (2010) a RRC connection establishment procedure. For example, during the RRC connection establishment procedure, the terminal device 210 may transmit a RRC connection request to the network device 220. The RRC connection request may include a terminal device identity of the terminal device 210. The terminal device 210 may start a timer (i.e., T300 timer) after transmitting the RRC connection request. The network device 220 may transmit a RRC connection setup message to the terminal device 210. For example, the RRC connection setup message may include configuration information for a SRB. The RRC connection setup message may also include configuration information for physical layer channels. Upon receiving the RRC connection setup message, the terminal device 210 may stop the timer and make a transition to the RRC connected state. [0090] The network device 220 may transmit (2020) a measurement configuration to the terminal device 210. For example, the measurement configuration may be transmitted in a Telefonaktiebolaget LM Ericsson (publ) - 29 - 30A-162143 RRC reconfiguration message. Detailed contents in the measurement configuration are described above, for example, according to clause 5.5 at 3GPP TS 38.331 V15.0.0 (published on 2018-01). After applying the measurement configuration, the terminal device 210 may transmit (2030) a RRC reconfiguration complete message to the network device 220. [0091] The network device 220 may determine (2040) that the measurement configuration needs to be updated. For example, if a cell is shut down, the network device 220 may determine that the measurement configuration needs to be updated to remove the cell from the measurement cell list. Alternatively, if any parameter related to the measurement is to be changed, the network device 220 may determine that the measurement configuration needs to be updated. [0092] The network device 220 transmits (2050) an indication (referred to as “first indication”) to at least one terminal device, for example, the terminal device 210. The first indication indicates that the system information is to be changed. By way of example, the first indication may be transmitted to the terminal device 110-1 shown in FIG. 1. Alternatively, or in addition, the first indication may be transmitted to the terminal devices 110-1 and 110-2 shown in FIG.1. It is noted that the at least one terminal device may include any suitable number of terminal devices, for example, only one terminal device or more than one terminal device. For example, the first indication may be received from the cell 101 that is the serving cell of the terminal device 220. In other words, the terminal device 210 receives the first information from the network device 120. For example, the terminal device 210 may monitor a physical layer channel (for example, a physical downlink control channel (PDCCH)) with a paging radio network temporary identifier (P-RNTI) to acquire the first indication. In some embodiments, the first indication may be transmitted in downlink control information (DCI). Alternatively, the first indication may be transmitted in a paging message. In some embodiments, the terminal device 210 may monitor the first indication indicating the system information to be changed in at least one paging occasion per modification period. For example, if the terminal device 210 is provided with a common search space, the terminal device 210 may monitor the first indication in any paging occasion at least once per modification period. [0093] As mentioned above, the terminal device 210 may be in a RRC connected state. In this case, in some embodiments, the first indication may include identifiers of one or more SIBs to be changed. For example, the SIBs may include one or more of: a master information Telefonaktiebolaget LM Ericsson (publ) - 30 - 30A-162143 block (MIB), SIB1, or SIB2. SIB1 may carry all basic information for the terminal device 210 to perform an initial attachment procedure and may also carry scheduling information for other SIBs. SIB2 may include radio resource configuration information that is common for all terminal devices, for example, access class barring configuration, random access channel related configuration, SRS configuration and the like. One or more SIBs can be read by terminal devices in the RRC connected state. By way of example, the first indication may indicate one or more of specific SIB numbers. As an example, the first indication may indicate that SIB1 or SIB2 is to be changed. Then, if there is any applicable SIB for the terminal device in the RRC connected state, the terminal device in the RRC connected state may read one or more specific SIBs according to a current 3GPP specification (for example, clause 5.2 at 3GPP TS 38.331 V15.0.0 (published on 2018-01)). [0094] Alternatively, the first indication indicates that a purpose of the system information is for measurement updating for the terminal devices in the RRC connected state. By way of example, the first indication describes the purpose of the specific SIB. For instance, the first indication may indicate ”measurement update for terminal devices in the RRC connected state”. Then, the terminal device in the RRC connected state may read one or more SIBs related to a measurement configuration for RRC connected terminal devices. [0095] In some other embodiments, the first indication may be a SIB modification indication transmitted in the paging message or the DCI. For example, an existing SIB modification indication (such as, an IE “systemInfoModification”) may be reused as the first indication. In some embodiments, if the terminal device 210 is in a RRC idle state or inactive state and is configured with a synchronization signal block (SSB) measurement during a RRC release procedure, the existing SIB modification indication may be reused as the first indication. [0096] The network device 220 transmits (2060) the system information indicated to be changed by the first indication to at least one terminal device, such as the terminal device 210, via a broadcast signaling. The system information indicates a first measurement configuration. In other words, the terminal device 210 receives the system information from the network device 210. For example, the system information may be received on a broadcast control channel (BCCH). In this way, compared with dedicated signaling, a signaling cost for transmitting the first measurement configuration can be saved. Telefonaktiebolaget LM Ericsson (publ) - 31 - 30A-162143 [0097] The first measurement configuration may be used for measuring one or more cells. For example, the one or more cells may include the serving cell 101. Alternatively, or in addition, the one or more cells may include one or more neighbor cells, for example, the cell 102 and/or the cell 103. It is noted that the one or more cells may include any proper number of cells. [0098] The first measurement configuration may include any measurement related configuration. For example, in some embodiments, the first measurement configuration may include a measurement object on which the terminal device 210 performs the measurement. For example, the first measurement configuration may include a list of measurement objects. Alternatively, or in addition, the first measurement configuration may include a measurement identity. The first measurement configuration may include a reporting configuration. In some other embodiments, the first measurement configuration may include a quantity configuration. The first measurement configuration may further include one or more of: a measurement gap or a list of excluded cells. Detailed descriptions of the measurement object, the measurement identity, the reporting configuration, the quantity configuration, the measurement gap, or the list of excluded cells are given above (for example, as described in clause 5.5.1 at 3GPP TS 38.331 V15.0.0 (published on 2018-01)), which are omitted here to avoid redundancy. The first measurement configuration transmitted in a SIB can use a predefined (or reserved) value. For instance, the first measurement configuration transmitted in the SIB can use a predefined measurement object ID, a measurement identity or a measurement reporting configuration not to overlap the existing measurement configuration. [0099] In some embodiments, whether to apply the first measurement configuration broadcasted on a BCCH channel is different, depending on the RRC state and when the system information is changed. For example, if the terminal device 210 is in the RRC idle state or the RRC inactive state, the terminal device 210 may ignore the first measurement configuration transmitted on the BCCH channel for terminal devices in the RRC connected state. Alternatively, if the terminal device 210 is in the RRC connected state and the T311 timer is running, the terminal device 210 may ignore the first measurement configuration transmitted on the BCCH channel for the terminal devices in the RRC connected state. In some other embodiments, the terminal device 210 may be configured to perform a measurement when the terminal device 210 is in the RRC idle or inactive state, which is known as early measurement. In this case, if the terminal device 210 is the RRC idle/inactive Telefonaktiebolaget LM Ericsson (publ) - 32 - 30A-162143 state with the early measurement, the terminal device 210 may apply the first measurement configuration. For example, the terminal device 210 may be configured with a SSB measurement during a RRC release procedure. [00100] In some embodiments, the terminal device 210 may receive a measurement configuration (referred to as “second measurement configuration”) from the network device 220 via a dedicated signaling in the modification period. In other words, the network device 220 may transmit (2055) the second measurement configuration to the terminal device 210 via the dedicated signaling (for example, a RRC message). In this case, the terminal device 210 may skip receiving the system information in the subsequent modification period. By way of example, if the terminal device 210 receives any measurement configuration via the dedicated signaling during the period where the system information change indication is broadcasted (i.e., modification period ‘n’), the terminal device 210 may not apply the first measurement configuration transmitted in the system information after receiving the changed system information during modification period ‘n+1’. When the terminal device 210 receives the measurement configuration via dedicated signaling during the modification period ‘n’ as in the above description, it may be expected that the terminal device 210 receives the measurement configuration which will be updated in the SIB soon. [00101] In some embodiments, if the terminal device 210 is in the RRC connected state, the terminal device 210 may apply the first measurement indicated in the system information. In some other embodiments, in case of an immediate SIB change, the terminal device 210 in the RRC connected sate may apply the first measurement configuration included in the system information after receiving the first indication indicating the system information to be changed. In this way, a size of RRC reconfiguration message can be reduced. [00102] In some embodiments, the terminal device 210 may receive the first measurement configuration from the network device 220 upon receiving the first indication indicating the system information to be changed. In other words, regardless of the modification period, the network device 220 may transmit the system information including the first measurement configuration immediately. In this case, after receiving the first indication indicating the system information to be changed, the terminal device 210 may start to read the system information including the first measurement configuration immediately. Telefonaktiebolaget LM Ericsson (publ) - 33 - 30A-162143 [00103] Alternatively, the terminal device 210 may receive the first indication indicating the system information to be changed from the network device 220 in a modification period. The terminal device 210 may then receive the system information including the first measurement configuration in a subsequent modification period. That is to say, the network device 220 may transmit the first indication during modification period n, wherein n is an integer number. The network device 220 may further transmit the system information in a modification period n+1. In this case, the terminal device 210 may apply the system information (SI) acquisition procedure from a start of the subsequent modification period (for example, the modification period n+1). [00104] In some embodiments, the system information may include a SIB that includes the first measurement configuration by the terminal devices in the RRC connected state. In this case, behaviors of the terminal device 210 when the SIB is received may look like below: Actions upon reception of SIBx Upon receiving SIBx the UE shall: 1> if in RRC_CONNECTED while T311 is not running: 2>perform the measurement configuration procedure as specified in 5.5.2; where T311 is a timer that is used for selecting and reconnecting with cell again and SIBx refers to the SIB that includes the first measurement configuration. When the T311 is running, the terminal device is in a RRC reestablishment procedure and may select and reconnect with a cell. [00105] Alternatively, the system information may include a SIB for terminal devices in the radio resource control idle state that includes a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. In other words, an existing SIB may be reused to signal the first measurement configuration. By way of example, the existing SIB (for example, SIB3/SIB4/SIB5) for terminal devices in the RRC idle state is used for transmitting the first measurement configuration for the terminal device 210 which is in the RRC connected state, where a new field for the terminal device in the RRC connected state is introduced in the existing SIB. In order to make the terminal device in the RRC connected state to read the change for SIB, a new indication may be introduced Telefonaktiebolaget LM Ericsson (publ) - 34 - 30A-162143 in DCI or paging message as described above. Then, the terminal device 210 may apply the field for the terminal device in the RRC connected state in the existing SIB and modify the existing measurement configuration received via dedicated signaling. In this case, as an example where the SIB2 is re used, behaviors of the terminal device 210 when the existing SIB is received may look like below.
Telefonaktiebolaget LM Ericsson (publ) - 35 - 30A-162143 1> 5.2.2.4.3 Actions upon reception of SIB2 Upon receiving SIB2, the UE shall: 1> if in RRC_IDLE or in RRC_INACTIVE or in RRC_CONNECTED while T311 is running: 2>if, for the entry in frequencyBandList with the same index as the frequency band selected in clause 5.2.2.4.2, the UE supports at least one additionalSpectrumEmission in the NR-NS-PmaxList within the frequencyBandList: 3>apply the first listed additionalSpectrumEmission which it supports among the values included in NR-NS-PmaxList within frequencyBandList; 3> if the additionalPmax is present in the same entry of the selected additionalSpectrumEmission within NR-NS-PmaxList: 4>apply the additionalPmax; 3>else: 4>apply the p-Max; 3> if the UE selects a frequency band (from the procedure in clause 5.2.2.4.2) for the supplementary uplink: 4>if, for the entry in frequencyBandListSUL with the same index as the frequency band selected in clause 5.2.2.4.2, the UE supports at least one additionalSpectrumEmission in the NR-NS-PmaxList within the frequencyBandListSUL: 5> apply the first listed additionalSpectrumEmission which it supports among the values included in NR-NS-PmaxList within frequencyBandListSUL; 5> if the additionalPmax is present in the same entry of the selected additionalSpectrumEmission within NR-NS-PmaxList: 6> apply the additionalPmax; 5> else: 6> apply the p-Max; 4>else: 5> apply the p-Max. 2>else: 3>apply the p-Max; 1> if in RRC_CONNECTED while T311 is not running: 2>perform the measurement configuration procedure as specified in 5.5.2; Telefonaktiebolaget LM Ericsson (publ) - 36 - 30A-162143 [00106] In some embodiments, an example IE of the SIB for the first measurement configuration may be as blow where the SIB (represented as “SIBx” below) may include the measurement configuration for the terminal devices in the RC connected state. -- ASN1START -- TAG-SIBx-START SIBx ::= SEQUENCE { measConfig MeasConfig OPTIONAL, -- Need R lateNonCriticalExtension OCTET STRING OPTIONAL, ... } -- TAG-SIBx-STOP -- ASN1STOP [00107] In some other embodiments, an example IE of the SIB for the first measurement configuration may be as below where the SIB (represented as “SIBx” below) may include the measurement configuration for the terminal devices in the RRC connected state. The example below only includes measurement objects. -- ASN1START -- TAG-SIBx-START SIBx ::= SEQUENCE { measObjectToRemoveList MeasObjectToRemoveList OPTIONAL, measObjectToAddModList MeasObjectToAddModList OPTIONAL, lateNonCriticalExtension OCTET STRING OPTIONAL, ... } -- TAG-SIBx-STOP -- ASN1STOP Telefonaktiebolaget LM Ericsson (publ) - 37 - 30A-162143 [00108] Alternatively, an example IE of the SIB for the first measurement configuration may be as below where the SIB (represented as “SIBx” below) may include the measurement configuration for the terminal devices in the RRC connected state. The example below only includes frequency specific cells related information. In this example, the terminal device 210 may receive the SIB and this SIB may include a list of frequencies and each of such frequencies may include an updated cell list for the list of excluded cells on that frequency. -- ASN1START -- TAG-SIBx-START SIBx ::= SEQUENCE { measCarrierUpdateList MeasCarrierUpdateList, lateNonCriticalExtension OCTET STRING OPTIONAL, ... } MeasCarrierUpdateList ::= SEQUENCE (SIZE (1..maxFreq)) OF MeasCarrierUpdate MeasCarrierUpdate ::= SEQUENCE { dl-CarrierFreq ARFCN-ValueNR, excludedCellList InterFreqExcludedCellList ... } InterFreqExcludedCellList ::= SEQUENCE (SIZE (1..maxCellExcluded)) OF PCI-Range -- TAG-SIBx-STOP -- ASN1STOP [00109] The terminal device 210 updates (2070) an existing measurement configuration based on the first measurement configuration. The existing measurement configuration may be a measurement configuration previously receives via a dedicated signaling. For example, the existing measurement configuration may refer to the measurement configuration transmitted (2020) by the network device 220. Alternatively, the existing measurement configuration may be a measurement configuration previously receives via another broadcast signaling. [00110] The terminal device 210 may transmit (2080 ) feedback information to the network device 220. In other words, the network device 220 may receive the feedback information from the terminal device 210. The feedback Telefonaktiebolaget LM Ericsson (publ) - 38 - 30A-162143 information may indicate whether the first measurement configuration is successfully applied. In some embodiments, if the feedback information indicates “success”, it means that the first measurement configuration is successfully applied. Alternatively, if the feedback information indicates “failure”, it means that the terminal device 210 has successfully read the SIB in the system information but fails to apply the first measurement configuration. In some other embodiments, if the feedback information indicates “SIB reading failure”, it means that the terminal device 210 failed to read the SIB in the system information. [00111] In some embodiments, the feedback information may be transmitted in a RRC message, for example, a measurement report. Alternatively, the feedback information may be transmitted in a medium access control (MAC) layer signaling. In some other embodiments, the feedback information may be transmitted in a physical layer signaling. In some embodiments, if the feedback information indicates that the terminal device 210 fails to apply the first measurement configuration, the network device 220 may ignore the measurement report. [00112] In some embodiments, the terminal device 210 may add or remove a cell from the list of excluded. For example, the updating the existing measurement configuration may include an addition or removal of a cell from the list of excluded cells as configured in the existing measurement configuration to the terminal device 210. [00113] In some other embodiments, the terminal device 210 may stop a timer that is running associated with the cell. For example, the terminal device 210 may stop any timers that are running in relation to the cell that has been added or removed from the list of excluded cells. An example of such a timer may be a timer associated to a time to trigger an evaluation of a measurement report. Another example of such a timer may be the timer associated to a report interval associated to the measurement report. [00114] Alternatively, the terminal device 210 may add or remove the cell to a conditional handover related configuration. For example, if the terminal device 210 is configured with a conditional handover related configuration for the cell that has been made part of the list of excluded cells, the terminal device 210 may discard the stored conditional handover configuration associated to said cell. [00115] In some embodiments, the system information may also indicate expiry time (or validity time) for the first measurement configuration. In this case, the terminal device 210 Telefonaktiebolaget LM Ericsson (publ) - 39 - 30A-162143 may determine whether the expiry time is elapsed. If the expiry time is elapsed, the terminal device 210 may remove the first measurement configuration. For example, a cell situation can be changed depending on traffic and the first measurement configuration cannot be ensured to be applicable. By introducing the expiry time or validity timer, it can avoid applying the first measurement configuration in an improper situation. [00116] In some embodiments, the expiry time may be indicated by absolute time or a frame number. For example, the expiry time may be provided by means of frame number. The frame number may include one of: a hyper frame number (HFN), a system frame number (SFN), or a subframe number. [00117] Alternatively, the expiry time may be indicated by a time duration where the system information comprising the first measurement configuration is valid. In some embodiments, the terminal device 210 may start a validity timer with the expiry time upon the reception of the system information. By way of example, the terminal device 210 may start validity timer with the received expiry time value when the terminal device 210 successfully receives the expiry time. In this case, when the validity timer expires, the terminal device 210 may consider that the system information including the first measurement configuration is not valid. In other words, after the validity timer expires, the terminal device 210 may remove the first measurement configuration received in the system information. [00118] In some embodiments, the terminal device 210 may be configured with a maximum duration for reading the system information that includes the first measurement configuration. In this case, in some embodiments, the terminal device 210 may start a timer associated with reading the system information upon the reception of the first indication. Alternatively, the terminal device 210 may start a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs. In some other embodiments, the terminal device 210 may start the timer associated with reading the system information, upon successfully receiving the corresponding SIB. [00119] The system information may also indicate a validity area for the first measurement configuration. In this case, if the terminal device 210 enters a cell that does not belong to the validity area, the terminal device 210 may remove the first measurement configuration. In some embodiments, the validity area may be represented by a list of cells. Alternatively, the validity area may be represented by a tracking area. For example, the validity area may be Telefonaktiebolaget LM Ericsson (publ) - 40 - 30A-162143 provided when broadcasting the first measurement configuration for the terminal device in the RRC idle or inactive state with the early measurement. The terminal device 210 may apply the received first measurement configuration transmitted via SIB within the validity area. When the terminal device 210 enters the cell which does not belong to the validity area, the terminal device 210 may consider that the first measurement configuration received via the SIB is invalid and remove the first measurement configuration. In this way, it can reduce effort of reading SIBs and save power. [00120] In some embodiments where the expiry time is configured with the validity area, when the terminal device 210 enters the cell which does not belong to the validity area, the terminal device 210 considers that the first measurement configuration received via the SIB is invalid but does not remove the first measurement configuration until the expiry time is elapsed. Before the expiry time, if the terminal device 210 enters the cell which belongs to the validity area, the terminal device 210 may consider that the first measurement configuration received via the SIB valid. [00121] In an embodiment, the terminal device 210 may transit from the RRC connected state to the RRC idle or inactive state. In this case, the terminal device 210 may remove the first measurement configuration. Alternatively, if the terminal device 210 transits from the RRC connected state to the RRC idle or inactive state that is configured with measurement during the RRC release procedure, the terminal device 210 may continue to apply the first measurement configuration. In some embodiments, if the terminal device 210 in the RRC idle or inactive state with the measurement selects to another cell, the terminal device 210 may remove the first measurement configuration. [00122] In some other embodiments, the network device 220 may transmit (2085) an indication (referred to as “second indication”) for releasing the first measurement configuration to the terminal device 210. In other words, the terminal device 210 may receive the second information from the network device 220. In this case, the terminal device 210 may release (2090) the first measurement configuration based on the second indication. For example, in case the expiry time is not indicated, the terminal device 210 may continue to use the first measurement configuration until the terminal device 210 receives a configuration which releases the first measurement configuration via a broadcast/dedicated signaling or a relevant SIB/field is not broadcasted. Telefonaktiebolaget LM Ericsson (publ) - 41 - 30A-162143 [00123] According to embodiments described with reference to FIG.2, the terminal device can receive measurement related information which modifies the existing measurement configuration via broadcast signaling and modify the existing measurement configuration. In this way, it can reduce the cost which is raised due to signaling the same information vie dedicated signaling. [00124] FIG. 3 to FIG. 7 show examples of signaling for transmitting a measurement configuration via a broadcast signaling, respectively. [00125] FIG. 3 shows a signaling chart 300 for updating the measurement configuration where a new SIB is used, according to some embodiments of the present disclosure. [00126] The terminal device 210 and the network device 220 may perform (3010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2. [00127] The network device 220 may transmit (3020) a RRC reconfiguration message including a measurement configuration to the terminal device 210. The terminal device 210 may apply the received measurement configuration. The terminal device 210 may transmit (3030) a RRC reconfiguration complete message, after applying the received measurement configuration. [00128] The network device 220 may determine (3040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for all RRC connected terminal devices due to a cell in a locking process. [00129] The network device 220 may transmit (3050) a DCI on a physical downlink control channel (PDCCH). The DCI may include a system information modification indication. [00130] The network device 220 may transmit (3060) a new SIB including another measurement configuration. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB for terminal devices in the RRC connected state in a next medication period. The terminal device 210 may update (3070) the existing stored measurement configuration (which is received at Telefonaktiebolaget LM Ericsson (publ) - 42 - 30A-162143 3020) based on the other measurement configuration received at 3060. Terminal devices in the RRC idle or inactive state may receive other SIBs except the new SIB. [00131] FIG. 4 shows a signaling chart 400 for updating the measurement configuration where a new indication and a new SIB are used, according to some embodiments of the present disclosure. [00132] The terminal device 210 and the network device 220 may perform (4010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2. [00133] The network device 220 may transmit (4020) a RRC reconfiguration message including a measurement configuration to the terminal device 210. The terminal device 210 may apply the received measurement configuration. The terminal device 210 may transmit (4030) a RRC reconfiguration complete message, after applying the received measurement configuration. [00134] The network device 220 may determine (4040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for all terminal devices in the RRC connected state due to a cell in a locking process. [00135] The network device 220 may transmit (4050) a DCI on a physical downlink control channel (PDCCH). The DCI may include a new indication that indicates the system information is to be changed for the measurement configuration. [00136] The network device 220 may transmit (4060) a new SIB including another measurement configuration. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB for terminal devices in the RRC connected state in a next medication period. The terminal device 210 may update (4070) the existing stored measurement configuration (which is received at 4020) based on the other measurement configuration received at 4060. Terminal devices in the RRC idle or inactive state may not try to read the received SIB. Telefonaktiebolaget LM Ericsson (publ) - 43 - 30A-162143 [00137] FIG. 5 shows a signaling chart 500 for updating the measurement configuration where a new indication and a new SIB are used, according to some embodiments of the present disclosure. [00138] The terminal device 210 and the network device 220 may perform (5010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2. [00139] The network device 220 may transmit (5020) a RRC reconfiguration message including a measurement configuration to the terminal device 210. The terminal device 210 may apply the received measurement configuration. The terminal device 210 may transmit (5030) a RRC reconfiguration complete message, after applying the received measurement configuration. [00140] The network device 220 may determine (5040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for all terminal devices in the RRC connected state due to a locking process of one or more neighbor cells. [00141] The network device 220 may transmit (5050) a DCI on a physical downlink control channel (PDCCH). The DCI may include a new indication that indicates the system information is to be changed for the measurement configuration. [00142] The network device 220 may transmit (5060) a new SIB including another measurement configuration. The other measurement configuration may include a list of excluded cells that contains the one or more neighbor cells. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB for terminal devices in the RRC connected state in a next medication period. The terminal device 210 may update (5070) the existing stored measurement configuration regarding the list of excluded cells. Terminal devices in the RRC idle or inactive state may not try to read the received SIB. [00143] FIG. 6 shows a signaling chart 600 for updating the measurement configuration where a new indication and a new SIB are used, according to some embodiments of the present disclosure. Telefonaktiebolaget LM Ericsson (publ) - 44 - 30A-162143 [00144] The terminal device 210 and the network device 220 may perform (6010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2. [00145] The network device 220 may transmit (6020) a RRC reconfiguration message including a measurement configuration to the terminal device 210. The terminal device 210 may apply the received measurement configuration. The terminal device 210 may transmit (6030) a RRC reconfiguration complete message, after applying the received measurement configuration. [00146] The network device 220 may determine (6040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for terminal devices in the RRC connected state due to a locking process of one or more neighbor cells. [00147] The network device 220 may transmit (6050) a DCI on a physical downlink control channel (PDCCH). The DCI may include a new indication that indicates the system information is to be changed for the measurement configuration. [00148] The network device 220 may transmit (6060) a new SIB including another measurement configuration. The other measurement configuration may indicate expiry time and a list of excluded cells that contains the one or more neighbor cells. That is, after receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB in a next medication period. The terminal device 210 may update (6070) an existing measurement configuration regarding the excluded cell list. Terminal devices in the RRC idle or inactive state may not try to read the received SIB. In some embodiments, the terminal device 210 may start (6080) a validity timer with the expiry time upon the reception of the system information. The terminal device 210 may determine (6085) whether the expiry time is elapsed. If the expiry time is elapsed, the terminal device 210 may remove (6090) the other measurement configuration received at 6060. If the expiry time is not elapsed, the terminal device 210 may continuously apply the other measurement configuration. [00149] FIG. 7 shows a signaling chart 700 for updating the measurement configuration where a new indication and a new SIB are used, according to some embodiments of the present disclosure. Telefonaktiebolaget LM Ericsson (publ) - 45 - 30A-162143 [00150] The terminal device 210 and the network device 220 may perform (7010) a RRC connection establishment procedure. The RRC connection establish procedure is performed in a similar way as that performed (2010) in FIG.2. [00151] The network device 220 may transmit (7020) a RRC reconfiguration message including a measurement configuration to the terminal device 210. The terminal device 210 may apply the received measurement configuration. The terminal device 210 may transmit (7030) a RRC reconfiguration complete message, after applying the received measurement configuration. [00152] The network device 220 may determine (7040) that there is a need for measurement configuration update. For example, the network device 220 may determine that the measurement configuration may be needed for all RRC connected terminal devices due to a cell shunting down. [00153] The network device 220 may transmit (7050) a DCI on a physical downlink control channel (PDCCH). The DCI may include a system information modification indication. [00154] The network device 220 may transmit (7060) a new SIB including another measurement configuration. The terminal device 211 that is in the RRC idle or inactive state may not try to read the received SIB. The terminal device 211 may transmit (7065) a measurement report that is obtained based on a previously received measurement configuration. [00155] After receiving the system information modification indication, the terminal device 210 in the RRC connected state may receive the new SIB in a next medication period. The terminal device 210 may update (7070) the existing measurement configuration (which is received at 7020) based on the other measurement configuration received at 7060. The terminal device 210 may transmit (7080) a measurement report that includes “SIB based update is a success” to the network device 220. [00156] FIG. 8 is a flowchart of an example method implemented by a terminal device in accordance with an embodiment of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the terminal device 110 in FIG.1. Telefonaktiebolaget LM Ericsson (publ) - 46 - 30A-162143 [00157] At block 810, after receiving the DCI from the network device 120, the terminal device 110 may determine whether the DCI includes the SIB change indication for the measurement configuration. If there is no SIB change indication, the terminal device 110 may not take any action at block 850. [00158] If the DCI includes the SIB change indication, the terminal device 110 may determine whether it is in the RRC connected state or in the RRC idle or inactive state with SSB measurement, at block 820. If the terminal device 110 is not in the RRC connected state or in the RRC idle or inactive state with SSB measurement, the terminal device 110 may take no action at block 850. [00159] At block 830, if the terminal device 110 is in the RRC connected state or in the RRC idle or inactive state with SSB measurement, the terminal device 110 may read SIB1 for SIB scheduling information and read a relevant SIB for the measurement configuration. At block 840, the terminal device 110 may modify the existing measurement configuration with the measurement configuration in the relevant SIB. [00160] FIG. 9 is a flowchart of an example method implemented by a terminal device in accordance with an embodiment of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the terminal device 110 in FIG.1. [00161] At block 910, the terminal device 110 receives from a network device 120, a first indication indicating system information to be changed. In an example, the first indication may be from a serving cell of the terminal device, and the first measurement configuration may be used for measuring one or more cells. [00162] At block 920, the terminal device 110 receives, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication. The system information includes a first measurement configuration. [00163] At block 930, the terminal device 110 updates an existing measurement configuration based on the first measurement configuration. In an example, updating the existing measurement configuration may comprise at least one of: an addition or removal of a cell from a list of excluded cells, stopping a timer that is running associated with the cell, or an addition or removal of the cell to a conditional handover related configuration. Telefonaktiebolaget LM Ericsson (publ) - 47 - 30A-162143 [00164] In an example, the terminal device 110 may be in a radio resource control connected state. In an example, the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state. In an example, the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. [00165] In an example, the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. [00166] In an example, receiving the system information may comprise receiving the first measurement configuration upon receiving the first indication indicating the system information to be changed. [00167] In an example, receiving the first indication may comprise: receiving the first indication indicating the system information to be changed in a modification period. In an example, receiving the system information may comprise receiving the system information comprising the first measurement configuration in a subsequent modification period. [00168] In an example, the terminal device 110 may receive a second measurement configuration via a dedicated signaling in the modification period. In this case, the terminal device may skip receiving the system information in the subsequent modification period. In an example, the terminal device 110 may monitor the first indication indicating the system information to be changed in at least one paging occasion per modification period. [00169] In an example, in response to that the terminal device 110 transits from the radio resource control connected state to a radio resource control idle or inactive state, the terminal device 110 may remove the first measurement configuration. In an example, in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state that is configured with measurement during the radio resource control release procedure, the terminal device 110 may continue to apply the first measurement configuration. Telefonaktiebolaget LM Ericsson (publ) - 48 - 30A-162143 [00170] In an example, the terminal device 110 may be in a radio resource control idle state or in inactive state. In an example, the terminal device 110 may be configured with a SSB measurement during a radio resource control release procedure. [00171] In an example, the system information may further indicate a validity area for the first measurement configuration. In this case, in response to that the terminal device enters a cell that does not belong to the validity area, the terminal device 110 may remove the first measurement configuration. [00172] In an example, the system information may further indicate expiry time for the first measurement configuration. In this case, the terminal device 110 may determine whether the expiry time is elapsed. If at the expiry time is elapsed, the terminal device 110 may remove the first measurement configuration. [00173] In an example, the expiry time may be indicated by one of: absolute time or a time duration. In an example, the terminal device 110 may start a validity timer with the expiry time upon the reception of the system information. [00174] In an example, the terminal device may be configured with a maximum duration for reading the system information that comprises the first measurement configuration. In an example, the terminal device 110 may start a timer associated with reading the system information upon the reception of the first indication. Alternatively, the terminal device 110 may start a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs. [00175] In an example, the first indication may be a SIB modification indication transmitted in a paging message or downlink control information. In an example, the terminal device 110 may transmit to the network device 120, feedback information indicating whether the first measurement configuration is successfully applied. In an example, the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. [00176] FIG.10 is a flowchart of an example method implemented by a terminal device in accordance with an embodiment of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the network device 120 in FIG.1. Telefonaktiebolaget LM Ericsson (publ) - 49 - 30A-162143 [00177] At block 1010, the network device 120 transmits to at least one terminal device, a first indication indicating system information to be changed. In an example, the first indication may be transmitted in a serving cell of the at least one terminal device, and the first measurement configuration may be used for one or more cells. [00178] At block 1020, the network device 120 transmits, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication. The system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. [00179] In an example, the at least one terminal device is in a radio resource control connected state. In an example, the first indication may comprise identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state. In an example, the first indication may indicate that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. In an example, the system information may comprise a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. [00180] In an example, the network device 120 may transmit the first indication indicating the system information to be changed in a modification period. The network device 120 may transmit the system information comprising the first measurement configuration in a subsequent modification period. [00181] In an example, the network device 120 may transmit a second measurement configuration via a dedicated signaling in the modification period. In an example, the network device 120 may transmit the first indication indicating the system information to be changed in at least one paging occasion per modification period. [00182] In an example, the at least one terminal device may be a radio resource control idle state or in inactive state. The terminal device110 may be configured with a synchronization signal block (SSB) measurement during a radio resource control release procedure. [00183] In an example, the system information may further indicate a validity area for the first measurement configuration. In an example, the system information may further indicate Telefonaktiebolaget LM Ericsson (publ) - 50 - 30A-162143 expiry time for the first measurement configuration. In an example, the expiry time may be indicated by one of: absolute time or a time duration. In an example, the first indication may be a SIB modification indication transmitted in a paging message or downlink control information. [00184] In an example, the network device 120 may receive, from the at least one terminal device, feedback information indicating whether the first measurement configuration is successfully applied. In an example, the network device 120 may transmit, to the at least one terminal device, a second indication for releasing the first measurement configuration. [00185] In an example, the first measurement configuration may comprise at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. [00186] FIG.11 is a block diagram showing an apparatus suitable for use in practicing some embodiments of the disclosure. For example, any one of the terminal devices and the base station described above may be implemented through the apparatus 1100. As shown, the apparatus 1100 may include a processor 1110, a memory 1120 that stores a program, and optionally a communication interface 1130 for communicating data with other external devices through wired and/or wireless communication. [00187] The program includes program instructions that, when executed by the processor 1110, enable the apparatus 1100 to operate in accordance with the embodiments of the present disclosure, as discussed above. That is, the embodiments of the present disclosure may be implemented at least in part by computer software executable by the processor 1110, or by hardware, or by a combination of software and hardware. [00188] The memory 1120 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor- based memory devices, flash memories, magnetic memory devices and systems, optical memory devices and systems, fixed memories and removable memories. The processor 1110 may be of any type suitable to the local technical environment, and may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multi-core processor architectures, as non- limiting examples. Telefonaktiebolaget LM Ericsson (publ) - 51 - 30A-162143 [00189] FIG. 12A shows a block diagram showing an apparatus 1200 suitable for use in practicing some embodiments of the present disclosure. For example, the apparatus 1200 may be the terminal device 110 shown in FIG.1. As shown in FIG.12A, the apparatus 1200 may include a transceiver module 1210 that is configured to receive, from a network device, a first indication indicating system information to be changed. The transceiver module 1210 may also be configured to receive, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication. The system information may include a first measurement configuration. The apparatus 1200 may also include a processing module 1220 that is configured to update an existing measurement configuration based on the first measurement configuration. The transceiver module 1210 and the processing module 1220 may also be configured to perform the method described with reference to FIG.9. [00190] FIG. 12B shows a block diagram showing an apparatus 1201 suitable for use in practicing some embodiments of the present disclosure. For example, the apparatus 1201 may be the network device 120 shown in FIG.1. As shown in FIG.12B, the apparatus 1201 may include a transceiver module 1211 that is configured to transmit, to at least one terminal device, a first indication indicating system information to be changed. The transceiver module 1211 may also be configured to transmit, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication. The system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. The network device 1201 may also include other modules, for example, a processing module 1221. The modules in the apparatus 1201 (for example, the transceiver module 1211 and the processing module 1221) may also be configured to perform the method described with reference to FIG.10. [00191] FIG. 13 shows an example of a communication system 3100 in accordance with some embodiments. [00192] In the example, the communication system 3100 includes a telecommunication network 3102 that includes an access network 3104, such as a radio access network (RAN), and a core network 3106, which includes one or more core network nodes 3108. The access network 3104 includes one or more access network nodes, such as network nodes 3110a and 3110b (one or more of which may be generally referred to as network nodes 3110), or any other similar 3rd Generation Partnership Project (3GPP) access node or non-3GPP access Telefonaktiebolaget LM Ericsson (publ) - 52 - 30A-162143 point. The network nodes 3110 facilitate direct or indirect connection of user equipment (UE), such as by connecting UEs 3112a, 3112b, 3112c, and 3112d (one or more of which may be generally referred to as UEs 3112) to the core network 3106 over one or more wireless connections. [00193] Example wireless communications over a wireless connection include transmitting and/or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and/or other types of signals suitable for conveying information without the use of wires, cables, or other material conductors. Moreover, in different embodiments, the communication system 3100 may include any number of wired or wireless networks, network nodes, UEs, and/or any other components or systems that may facilitate or participate in the communication of data and/or signals whether via wired or wireless connections. The communication system 3100 may include and/or interface with any type of communication, telecommunication, data, cellular, radio network, and/or other similar type of system. [00194] The UEs 3112 may be any of a wide variety of communication devices, including wireless devices arranged, configured, and/or operable to communicate wirelessly with the network nodes 3110 and other communication devices. Similarly, the network nodes 3110 are arranged, capable, configured, and/or operable to communicate directly or indirectly with the UEs 3112 and/or with other network nodes or equipment in the telecommunication network 3102 to enable and/or provide network access, such as wireless network access, and/or to perform other functions, such as administration in the telecommunication network 3102. [00195] In the depicted example, the core network 3106 connects the network nodes 3110 to one or more hosts, such as host 3116. These connections may be direct or indirect via one or more intermediary networks or devices. In other examples, network nodes may be directly coupled to hosts. The core network 3106 includes one more core network node (e.g., core network node 3108) that are structured with hardware and software components. Features of these components may be substantially similar to those described with respect to the UEs, network nodes, and/or hosts, such that the descriptions thereof are generally applicable to the corresponding components of the core network node 3108. Example core network nodes include functions of one or more of a Mobile Switching Center (MSC), Mobility Management Entity (MME), Home Subscriber Server (HSS), Access and Mobility Management Function (AMF), Session Management Function (SMF), Authentication Server Telefonaktiebolaget LM Ericsson (publ) - 53 - 30A-162143 Function (AUSF), Subscription Identifier De-concealing function (SIDF), Unified Data Management (UDM), Security Edge Protection Proxy (SEPP), Network Exposure Function (NEF), and/or a User Plane Function (UPF). [00196] The host 3116 may be under the ownership or control of a service provider other than an operator or provider of the access network 3104 and/or the telecommunication network 3102 and may be operated by the service provider or on behalf of the service provider. The host 3116 may host a variety of applications to provide one or more service. Examples of such applications include live and pre-recorded audio/video content, data collection services such as retrieving and compiling data on various ambient conditions detected by a plurality of UEs, analytics functionality, social media, functions for controlling or otherwise interacting with remote devices, functions for an alarm and surveillance center, or any other such function performed by a server. [00197] As a whole, the communication system 3100 of FIG. 13 enables connectivity between the UEs, network nodes, and hosts. In that sense, the communication system may be configured to operate according to predefined rules or procedures, such as specific standards that include, but are not limited to: Global System for Mobile Communications (GSM); Universal Mobile Telecommunications System (UMTS); Long Term Evolution (LTE), and/or other suitable 2G, 3G, 4G, 5G standards, or any applicable future generation standard (e.g., 6G); wireless local area network (WLAN) standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards (WiFi); and/or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave, Near Field Communication (NFC) ZigBee, LiFi, and/or any low-power wide-area network (LPWAN) standards such as LoRa and Sigfox. [00198] In some examples, the telecommunication network 3102 is a cellular network that implements 3GPP standardized features. Accordingly, the telecommunications network 3102 may support network slicing to provide different logical networks to different devices that are connected to the telecommunication network 3102. For example, the telecommunications network 3102 may provide Ultra Reliable Low Latency Communication (URLLC) services to some UEs, while providing Enhanced Mobile Broadband (eMBB) services to other UEs, and/or Massive Machine Type Communication (mMTC)/Massive IoT services to yet further UEs. Telefonaktiebolaget LM Ericsson (publ) - 54 - 30A-162143 [00199] In some examples, the UEs 3112 are configured to transmit and/or receive information without direct human interaction. For instance, a UE may be designed to transmit information to the access network 3104 on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the access network 3104. Additionally, a UE may be configured for operating in single- or multi-RAT or multi- standard mode. For example, a UE may operate with any one or combination of Wi-Fi, NR (New Radio) and LTE, i.e., being configured for multi-radio dual connectivity (MR-DC), such as E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) New Radio – Dual Connectivity (EN-DC). [00200] In the example, the hub 3114 communicates with the access network 3104 to facilitate indirect communication between one or more UEs (e.g., UE 3112c and/or 3112d) and network nodes (e.g., network node 3110b). In some examples, the hub 3114 may be a controller, router, content source and analytics, or any of the other communication devices described herein regarding UEs. For example, the hub 3114 may be a broadband router enabling access to the core network 3106 for the UEs. As another example, the hub 3114 may be a controller that sends commands or instructions to one or more actuators in the UEs. Commands or instructions may be received from the UEs, network nodes 3110, or by executable code, script, process, or other instructions in the hub 3114. As another example, the hub 3114 may be a data collector that acts as temporary storage for UE data and, in some embodiments, may perform analysis or other processing of the data. As another example, the hub 3114 may be a content source. For example, for a UE that is a VR headset, display, loudspeaker or other media delivery device, the hub 3114 may retrieve VR assets, video, audio, or other media or data related to sensory information via a network node, which the hub 3114 then provides to the UE either directly, after performing local processing, and/or after adding additional local content. In still another example, the hub 3114 acts as a proxy server or orchestrator for the UEs, in particular in if one or more of the UEs are low energy IoT devices. [00201] The hub 3114 may have a constant/persistent or intermittent connection to the network node 3110b. The hub 3114 may also allow for a different communication scheme and/or schedule between the hub 3114 and UEs (e.g., UE 3112c and/or 3112d), and between the hub 3114 and the core network 3106. In other examples, the hub 3114 is connected to the core network 3106 and/or one or more UEs via a wired connection. Moreover, the hub 3114 Telefonaktiebolaget LM Ericsson (publ) - 55 - 30A-162143 may be configured to connect to an M2M service provider over the access network 3104 and/or to another UE over a direct connection. In some scenarios, UEs may establish a wireless connection with the network nodes 3110 while still connected via the hub 3114 via a wired or wireless connection. In some embodiments, the hub 3114 may be a dedicated hub – that is, a hub whose primary function is to route communications to/from the UEs from/to the network node 3110b. In other embodiments, the hub 3114 may be a non-dedicated hub – that is, a device which is capable of operating to route communications between the UEs and network node 3110b, but which is additionally capable of operating as a communication start and/or end point for certain data channels. [00202] FIG.14 is a block diagram of a host 3200, which may be an embodiment of the host 3116 of FIG. 13, in accordance with various aspects described herein. As used herein, the host 3200 may be or comprise various combinations hardware and/or software, including a standalone server, a blade server, a cloud-implemented server, a distributed server, a virtual machine, container, or processing resources in a server farm. The host 3200 may provide one or more services to one or more UEs. [00203] The host 3200 includes processing circuitry 3202 that is operatively coupled via a bus 3204 to an input/output interface 3206, a network interface 3208, a power source 3210, and a memory 3212. Other components may be included in other embodiments. Features of these components may be substantially similar to those described with respect to the devices of previous figures such that the descriptions thereof are generally applicable to the corresponding components of host 3200. [00204] The memory 3212 may include one or more computer programs including one or more host application programs 3214 and data 3216, which may include user data, e.g., data generated by a UE for the host 3200 or data generated by the host 3200 for a UE. Embodiments of the host 3200 may utilize only a subset or all of the components shown. The host application programs 3214 may be implemented in a container-based architecture and may provide support for video codecs (e.g., Versatile Video Coding (VVC), High Efficiency Video Coding (HEVC), Advanced Video Coding (AVC), MPEG, VP9) and audio codecs (e.g., FLAC, Advanced Audio Coding (AAC), MPEG, G.711), including transcoding for multiple different classes, types, or implementations of UEs (e.g., handsets, desktop computers, wearable display systems, heads-up display systems). The host application programs 3214 may also provide for user authentication and licensing checks and may Telefonaktiebolaget LM Ericsson (publ) - 56 - 30A-162143 periodically report health, routes, and content availability to a central node, such as a device in or on the edge of a core network. Accordingly, the host 3200 may select and/or indicate a different host for over-the-top services for a UE. The host application programs 3214 may support various protocols, such as the HTTP Live Streaming (HLS) protocol, Real-Time Messaging Protocol (RTMP), Real-Time Streaming Protocol (RTSP), Dynamic Adaptive Streaming over HTTP (MPEG-DASH), etc. [00205] FIG. 15 shows a communication diagram of a host 3302 communicating via a network node 3304 with a UE 3306 over a partially wireless connection in accordance with some embodiments. Example implementations, in accordance with various embodiments, of the UE (such as a UE 3112a of FIG.13), network node (such as network node 3110a of FIG. 13), and host (such as host 3116 of FIG. 13 and/or host 3200 of FIG. 14) discussed in the preceding paragraphs will now be described with reference to FIG.15. [00206] Like host 3200, embodiments of host 3302 include hardware, such as a communication interface, processing circuitry, and memory. The host 3302 also includes software, which is stored in or accessible by the host 3302 and executable by the processing circuitry. The software includes a host application that may be operable to provide a service to a remote user, such as the UE 3306 connecting via an over-the-top (OTT) connection 3350 extending between the UE 3306 and host 3302. In providing the service to the remote user, a host application may provide user data which is transmitted using the OTT connection 3350. [00207] The network node 3304 includes hardware enabling it to communicate with the host 3302 and UE 3306. The connection 3360 may be direct or pass through a core network (like core network 3106 of FIG.13) and/or one or more other intermediate networks, such as one or more public, private, or hosted networks. For example, an intermediate network may be a backbone network or the Internet. [00208] The UE 3306 includes hardware and software, which is stored in or accessible by UE 3306 and executable by the UE’s processing circuitry. The software includes a client application, such as a web browser or operator-specific “app” that may be operable to provide a service to a human or non-human user via UE 3306 with the support of the host 3302. In the host 3302, an executing host application may communicate with the executing client application via the OTT connection 3350 terminating at the UE 3306 and host 3302. In Telefonaktiebolaget LM Ericsson (publ) - 57 - 30A-162143 providing the service to the user, the UE's client application may receive request data from the host's host application and provide user data in response to the request data. The OTT connection 3350 may transfer both the request data and the user data. The UE's client application may interact with the user to generate the user data that it provides to the host application through the OTT connection 3350. [00209] The OTT connection 3350 may extend via a connection 3360 between the host 3302 and the network node 3304 and via a wireless connection 3370 between the network node 3304 and the UE 3306 to provide the connection between the host 3302 and the UE 3306. The connection 3360 and wireless connection 3370, over which the OTT connection 3350 may be provided, have been drawn abstractly to illustrate the communication between the host 3302 and the UE 3306 via the network node 3304, without explicit reference to any intermediary devices and the precise routing of messages via these devices. [00210] As an example of transmitting data via the OTT connection 3350, in step 3308, the host 3302 provides user data, which may be performed by executing a host application. In some embodiments, the user data is associated with a particular human user interacting with the UE 3306. In other embodiments, the user data is associated with a UE 3306 that shares data with the host 3302 without explicit human interaction. In step 3310, the host 3302 initiates a transmission carrying the user data towards the UE 3306. The host 3302 may initiate the transmission responsive to a request transmitted by the UE 3306. The request may be caused by human interaction with the UE 3306 or by operation of the client application executing on the UE 3306. The transmission may pass via the network node 3304, in accordance with the teachings of the embodiments described throughout this disclosure. Accordingly, in step 3312, the network node 3304 transmits to the UE 3306 the user data that was carried in the transmission that the host 3302 initiated, in accordance with the teachings of the embodiments described throughout this disclosure. In step 3314, the UE 3306 receives the user data carried in the transmission, which may be performed by a client application executed on the UE 3306 associated with the host application executed by the host 3302. [00211] In some examples, the UE 3306 executes a client application which provides user data to the host 3302. The user data may be provided in reaction or response to the data received from the host 3302. Accordingly, in step 3316, the UE 3306 may provide user data, which may be performed by executing the client application. In providing the user data, the client application may further consider user input received from the user via an input/output Telefonaktiebolaget LM Ericsson (publ) - 58 - 30A-162143 interface of the UE 3306. Regardless of the specific manner in which the user data was provided, the UE 3306 initiates, in step 3318, transmission of the user data towards the host 3302 via the network node 3304. In step 3320, in accordance with the teachings of the embodiments described throughout this disclosure, the network node 3304 receives user data from the UE 3306 and initiates transmission of the received user data towards the host 3302. In step 3322, the host 3302 receives the user data carried in the transmission initiated by the UE 3306. [00212] One or more of the various embodiments improve the performance of OTT services provided to the UE 3306 using the OTT connection 3350, in which the wireless connection 3370 forms the last segment. More precisely, the teachings of these embodiments may improve the data rate and thereby provide benefits such as relaxed restriction on file size, improved content resolution, and better responsiveness. [00213] In an example scenario, factory status information may be collected and analyzed by the host 3302. As another example, the host 3302 may process audio and video data which may have been retrieved from a UE for use in creating maps. As another example, the host 3302 may collect and analyze real-time data to assist in controlling vehicle congestion (e.g., controlling traffic lights). As another example, the host 3302 may store surveillance video uploaded by a UE. As another example, the host 3302 may store or control access to media content such as video, audio, VR or AR which it can broadcast, multicast or unicast to UEs. As other examples, the host 3302 may be used for energy pricing, remote control of non-time critical electrical load to balance power generation needs, location services, presentation services (such as compiling diagrams etc. from data collected from remote devices), or any other function of collecting, retrieving, storing, analyzing and/or transmitting data. [00214] In some examples, a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring the OTT connection 3350 between the host 3302 and UE 3306, in response to variations in the measurement results. The measurement procedure and/or the network functionality for reconfiguring the OTT connection may be implemented in software and hardware of the host 3302 and/or UE 3306. In some embodiments, sensors (not shown) may be deployed in or in association with other devices through which the OTT connection 3350 passes; the sensors may participate in the measurement procedure by supplying values of the monitored Telefonaktiebolaget LM Ericsson (publ) - 59 - 30A-162143 quantities exemplified above, or supplying values of other physical quantities from which software may compute or estimate the monitored quantities. The reconfiguring of the OTT connection 3350 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not directly alter the operation of the network node 3304. Such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary UE signaling that facilitates measurements of throughput, propagation times, latency and the like, by the host 3302. The measurements may be implemented in that software causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 3350 while monitoring propagation times, errors, etc. [00215] In an aspect of the disclosure, there is provided a method implemented in a host configured to operate in a communication system that further includes a network node and a user equipment (UE). The method may comprise providing user data for the UE. The method may further comprise initiating a transmission carrying the user data to the UE via a cellular network comprising the network node. The network node may perform the following operations to transmit the user data from the host to the UE. The network node may schedule, for a first terminal device whose capability of whether supporting FDM of a first physical channel for transmitting traffic data and a second physical channel for transmitting control information is unknown to the network node, one or more transmissions each using the first physical channel that is multiplexed with the second physical channel in an FDM manner. The network node may perform the one or more transmissions to the first terminal device, based on the scheduling. The network node may receive, from the first terminal device, one or more reception feedbacks on the one or more transmissions. The network node may determine whether the first terminal device supports FDM of the first and second physical channels, based on the one or more reception feedbacks. [00216] In an embodiment of the disclosure, the method may further comprise, at the network node, transmitting the user data provided by the host for the UE. [00217] In an embodiment of the disclosure, the user data may be provided at the host by executing a host application that interacts with a client application executing on the UE. The client application may be associated with the host application. Telefonaktiebolaget LM Ericsson (publ) - 60 - 30A-162143 [00218] In another aspect of the disclosure, there is provided a host configured to operate in a communication system to provide an over-the-top (OTT) service. The host may comprise processing circuitry configured to provide user data; and a network interface configured to initiate transmission of the user data to a network node in a cellular network for transmission to a user equipment (UE). The network node may have a communication interface and processing circuitry. The processing circuitry of the network node may be configured to perform the following operations to transmit the user data from the host to the UE. The processing circuitry of the network node may be configured to schedule, for a first terminal device whose capability of whether supporting FDM of a first physical channel for transmitting traffic data and a second physical channel for transmitting control information is unknown to the network node, one or more transmissions each using the first physical channel that is multiplexed with the second physical channel in an FDM manner. The processing circuitry of the network node may be configured to perform the one or more transmissions to the first terminal device, based on the scheduling. The processing circuitry of the network node may be configured to receive, from the first terminal device, one or more reception feedbacks on the one or more transmissions. The processing circuitry of the network node may be configured to determine whether the first terminal device supports FDM of the first and second physical channels, based on the one or more reception feedbacks. [00219] In an embodiment of the disclosure, the processing circuitry of the host may be configured to execute a host application that provides the user data. The UE may comprise processing circuitry configured to execute a client application associated with the host application to receive the transmission of user data from the host. [00220] In yet another aspect of the disclosure, there is provided a communication system configured to provide an over-the-top service. The communication system may comprise a host. The host may comprise processing circuitry configured to provide user data for a user equipment (UE). The user data may be associated with the over-the-top service. The host may further comprise a network interface configured to initiate transmission of the user data toward a cellular network node for transmission to the UE. The network node may have a communication interface and processing circuitry. The processing circuitry of the network node may be configured to perform the following operations to transmit the user data from the host to the UE. The processing circuitry of the network node may be configured to schedule, for a first terminal device whose capability of whether supporting FDM of a first Telefonaktiebolaget LM Ericsson (publ) - 61 - 30A-162143 physical channel for transmitting traffic data and a second physical channel for transmitting control information is unknown to the network node, one or more transmissions each using the first physical channel that is multiplexed with the second physical channel in an FDM manner. The processing circuitry of the network node may be configured to perform the one or more transmissions to the first terminal device, based on the scheduling. The processing circuitry of the network node may be configured to receive, from the first terminal device, one or more reception feedbacks on the one or more transmissions. The processing circuitry of the network node may be configured to determine whether the first terminal device supports FDM of the first and second physical channels, based on the one or more reception feedbacks. [00221] In an embodiment of the disclosure, the communication system may further comprise the network node; and/or the user equipment. [00222] In an embodiment of the disclosure, the processing circuitry of the host may be configured to execute a host application, thereby providing the user data. The host application may be configured to interact with a client application executing on the UE. The client application may be associated with the host application. [00223] In a first aspect of the disclosure, there is provided a method implemented by a terminal device for communication. The method comprises: receiving, from a network device, a first indication indicating system information to be changed; receiving, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration; and updating an existing measurement configuration based on the first measurement configuration. [00224] In an embodiment, the first indication is received from a serving cell of the terminal device, and the first measurement configuration is used for measuring one or more cells. [00225] In an embodiment, the terminal device is in a radio resource control connected state. [00226] In an embodiment, the first indication comprises identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or the first indication indicates that a Telefonaktiebolaget LM Ericsson (publ) - 62 - 30A-162143 purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. [00227] In an embodiment, the system information comprises a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. [00228] In an embodiment, receiving the system information comprises receiving the first measurement configuration upon receiving the first indication indicating the system information to be changed. [00229] In an embodiment, receiving the first indication comprises: receiving the first indication indicating the system information to be changed in a modification period; and receiving the system information comprises: receiving the system information comprising the first measurement configuration in a subsequent modification period. [00230] In an embodiment, the method comprises receiving a second measurement configuration via a dedicated signaling in the modification period; and skipping receiving the system information in the subsequent modification period. [00231] In an embodiment, the method comprises monitoring the first indication indicating the system information to be changed in at least one paging occasion per modification period. [00232] In an embodiment, the method comprises in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state, removing the first measurement configuration; and in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state that is configured with measurement during the radio resource control release procedure, continuing to apply the first measurement configuration. [00233] In an embodiment, the terminal device is in a radio resource control idle state or in inactive state; and the terminal device is configured with a SSB measurement during a radio resource control release procedure. [00234] In an embodiment, the system information further indicates a validity area for the first measurement configuration. In an embodiment, the method comprises in response to that Telefonaktiebolaget LM Ericsson (publ) - 63 - 30A-162143 the terminal device enters a cell that does not belong to the validity area, removing the first measurement configuration. [00235] In an embodiment, the system information further indicates expiry time for the first measurement configuration. In an embodiment, the method comprises determining whether the expiry time is elapsed; and in response to that the expiry time is elapsed, removing the first measurement configuration. [00236] In an embodiment, the expiry time is indicated by one of: absolute time or a time duration. [00237] In an embodiment, the method comprises starting a validity timer with the expiry time upon the reception of the system information. [00238] In an embodiment, the terminal device is configured with a maximum duration for reading the system information that comprises the first measurement configuration. In an embodiment, the method further comprises starting a timer associated with reading the system information upon the reception of the first indication; or starting a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs. [00239] In an embodiment, the first indication is a SIB modification indication transmitted in a paging message or downlink control information. [00240] In an embodiment, the method comprises transmitting, to the network device, feedback information indicating whether the first measurement configuration is successfully applied. [00241] In an embodiment, updating the existing measurement configuration comprises at least one of: an addition or removal of a cell from a list of excluded cells, stopping a timer that is running associated with the cell, or an addition or removal of the cell to a conditional handover related configuration. [00242] In an embodiment, the first measurement configuration comprises at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. Telefonaktiebolaget LM Ericsson (publ) - 64 - 30A-162143 [00243] In a second aspect of the disclosure, there is provided a method implemented by a network device for communication. The method comprises transmitting, to at least one terminal device, a first indication indicating system information to be changed; and transmitting, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. [00244] In an embodiment, the at least one terminal device comprises one terminal device or more than one terminal device. [00245] In an embodiment, the first indication is transmitted in a serving cell of the at last one terminal device, and the first measurement configuration is used for one or more cells. [00246] In an embodiment, the at least one terminal device is in a radio resource control connected state. [00247] In an embodiment, the first indication comprises identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or the first indication indicates that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. [00248] In an embodiment, the system information comprises a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. [00249] In an embodiment, transmitting the first indication comprises: transmitting the first indication indicating the system information to be changed in a modification period. In an embodiment, transmitting the system information comprises transmitting the system information comprising the first measurement configuration in a subsequent modification period. Telefonaktiebolaget LM Ericsson (publ) - 65 - 30A-162143 [00250] In an embodiment, the method comprises transmitting, to the at least one terminal device, a second measurement configuration via a dedicated signaling in the modification period. [00251] In an embodiment, the method comprises transmitting, to the at least one terminal device, the first indication indicating the system information to be changed in at least one paging occasion per modification period. [00252] In an embodiment, the at least one terminal device is a radio resource control idle state or in inactive state; and the at least one terminal device is configured with a synchronization signal block (SSB) measurement during a radio resource control release procedure. [00253] In an embodiment, the system information further indicates a validity area for the first measurement configuration. [00254] In an embodiment, the system information further indicates expiry time for the first measurement configuration. [00255] In an embodiment, the expiry time is indicated by one of: absolute time or a time duration. [00256] In an embodiment, the first indication is a SIB modification indication transmitted in a paging message or downlink control information. [00257] In an embodiment, the method comprises receiving, from the at least one terminal device, feedback information indicating whether the first measurement configuration is successfully applied. [00258] In an embodiment, the method comprises transmitting, to the at least one terminal device, a second indication for releasing the first measurement configuration. [00259] In an embodiment, the first measurement configuration comprises at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. [00260] In general, the various exemplary embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some Telefonaktiebolaget LM Ericsson (publ) - 66 - 30A-162143 aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the disclosure is not limited thereto. While various aspects of the exemplary embodiments of this disclosure may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof. [00261] As such, it should be appreciated that at least some aspects of the exemplary embodiments of the disclosure may be practiced in various components such as integrated circuit chips and modules. It should thus be appreciated that the exemplary embodiments of this disclosure may be realized in an apparatus that is embodied as an integrated circuit, where the integrated circuit may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor, a digital signal processor, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this disclosure. [00262] It should be appreciated that at least some aspects of the exemplary embodiments of the disclosure may be embodied in computer-executable instructions, such as in one or more program modules, executed by one or more computers or other devices. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types when executed by a processor in a computer or other device. The computer executable instructions may be stored on a computer readable medium such as a hard disk, optical disk, removable storage media, solid state memory, RAM, etc. As will be appreciated by one skilled in the art, the function of the program modules may be combined or distributed as desired in various embodiments. In addition, the function may be embodied in whole or in part in firmware or hardware equivalents such as integrated circuits, field programmable gate arrays (FPGA), and the like. [00263] References in the present disclosure to “one embodiment”, “an embodiment” and so on, indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same Telefonaktiebolaget LM Ericsson (publ) - 67 - 30A-162143 embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to implement such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. [00264] It should be understood that, although the terms “first”, “second” and so on may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of the disclosure. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed terms. [00265] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “has”, “having”, “includes” and/or “including”, when used herein, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components and/ or combinations thereof. The terms “connect”, “connects”, “connecting” and/or “connected” used herein cover the direct and/or indirect connection between two elements. It should be noted that two blocks shown in succession in the above figures may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. [00266] The present disclosure includes any novel feature or combination of features disclosed herein either explicitly or any generalization thereof. Various modifications and adaptations to the foregoing exemplary embodiments of this disclosure may become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings. However, any and all modifications will still fall within the scope of the non-Limiting and exemplary embodiments of this disclosure.

Claims

Telefonaktiebolaget LM Ericsson (publ) - 68 - 30A-162143 Claims 1. A method implemented by a terminal device for communication, comprising: receiving (2050; 3050; 4050; 5050; 6050; 7050; 910), from a network device (120; 220), a first indication indicating system information to be changed; receiving (2060; 3060; 4060; 5060; 6060; 7060; 920), via a broadcast signaling from the network device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration; and updating (2070; 3070; 4070; 5070; 6070; 7070; 930) an existing measurement configuration based on the first measurement configuration. 2. The method of claim 1, wherein the first indication is received from a serving cell (101) of the terminal device, and wherein the first measurement configuration is used for measuring one or more cells (101; 102; 103). 3. The method of claim 1 or 2, wherein the terminal device is in a radio resource control connected state. 4. The method of claim 3, wherein the first indication comprises identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or wherein the first indication indicates that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. 5. The method of claim 3, wherein the system information comprises a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. 6. The method of claim 3, wherein receiving the system information comprises: receiving (2060; 3060; 4060; 5060; 6060; 7060; 920) the system information comprising the first measurement configuration upon receiving the first indication indicating the system information to be changed. Telefonaktiebolaget LM Ericsson (publ) - 69 - 30A-162143 7. The method of claim 3, wherein receiving the first indication comprises: receiving (2050; 3050; 4050; 5050; 6050; 7050; 910) the first indication indicating the system information to be changed in a modification period; and wherein receiving the system information comprises: receiving (2060; 3060; 4060; 5060; 6060; 7060; 920) the system information comprising the first measurement configuration in a subsequent modification period. 8. The method of claim 7, further comprising: receiving (2055) a second measurement configuration via a dedicated signaling in the modification period; and skipping receiving the system information in the subsequent modification period. 9. The method of any of claims 3-8, further comprising: monitoring the first indication indicating the system information to be changed in at least one paging occasion per modification period. 10. The method of any of claims 3-9, further comprising: in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state, removing the first measurement configuration; and in response to that the terminal device transits from the radio resource control connected state to a radio resource control idle or inactive state that is configured with measurement during the radio resource control release procedure, continuing to apply the first measurement configuration. 11. The method of claim 1 or 2, wherein the terminal device is in a radio resource control idle state or in inactive state; and the terminal device is configured with a SSB measurement during a radio resource control release procedure. 12. The method of claim 11, wherein the system information further indicates a validity area for the first measurement configuration, and wherein the method further comprises: Telefonaktiebolaget LM Ericsson (publ) - 70 - 30A-162143 in response to that the terminal device enters a cell that does not belong to the validity area, removing the first measurement configuration. 13. The method of any of claims 1-12, wherein the system information further indicates expiry time for the first measurement configuration, and wherein the method further comprises: determining (6080) whether the expiry time is elapsed; and in response to that the expiry time is elapsed, removing (6090) the first measurement configuration. 14. The method of claim 13, wherein the expiry time is indicated by one of: absolute time or a time duration. 15. The method of claim 13, further comprising: starting (6085) a validity timer with the expiry time upon the reception of the system information. 16. The method of any of claims 1-12, wherein the terminal device is configured with a maximum duration for reading the system information that comprises the first measurement configuration; and wherein the method further comprises: starting a timer associated with reading the system information upon the reception of the first indication; or starting a timer associated with reading the system information upon the reception of a SIB1 including scheduling information of other SIBs. 17. The method of any of claims 1-16, wherein the first indication is a SIB modification indication transmitted in a paging message or downlink control information. 18. The method of any of claims 1-17, further comprising: transmitting (2080), to the network device, feedback information indicating whether the first measurement configuration is successfully applied. 19. The method of any of claims 1-18, further comprising: Telefonaktiebolaget LM Ericsson (publ) - 71 - 30A-162143 receiving (2085), from the network device, a second indication for releasing the first measurement configuration; and releasing (2090) the first measurement configuration based on the second indication. 20. The method of any of claims 1-19, wherein updating (2070; 3070; 4070; 5070; 6070; 7070; 930) the existing measurement configuration comprises at least one of: an addition or removal of a cell from a list of excluded cells, stopping a timer that is running associated with the cell, or an addition or removal of the cell to a conditional handover related configuration. 21. The method of any of claims 1-20, wherein the first measurement configuration comprises at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. 22. A method implemented by a network device for communication, comprising: transmitting (2050; 3050; 4050; 5050; 6050; 7050; 1010), to at least one terminal device, a first indication indicating system information to be changed; and transmitting (2050; 3050; 4050; 5050; 6050; 7050; 1020), via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. 23. The method of claim 22, wherein the at least one terminal device comprises one terminal device or more than one terminal device. 24. The method of claim 22 or 23, wherein the first indication is transmitted in a serving cell (101) of the at least one terminal device, and wherein the first measurement configuration is used for one or more cells (101; 102; 103). Telefonaktiebolaget LM Ericsson (publ) - 72 - 30A-162143 25. The method of any of claims 22-24, wherein the at least one terminal device is in a radio resource control connected state. 26. The method of claim 25, wherein the first indication comprises identifiers of one or more system information blocks (SIBs) to be changed and the one or more SIBs are read by terminal devices in the radio resource control connected state, or wherein the first indication indicates that a purpose of the system information is for measurement updating for the terminal devices in the radio resource control connected state. 27. The method of claim 25, wherein the system information comprises a SIB for terminal devices in the radio resource control idle state that comprises a new field indicating the first measurement configuration applied by the terminal devices in the resource control connected state. 28. The method of claim 25, wherein transmitting the first indication comprises: transmitting (2050; 3050; 4050; 5050; 6050; 7050; 1010) the first indication indicating the system information to be changed in a modification period; and wherein transmitting the system information comprises: transmitting (2060; 3060; 4060; 5060; 6060; 7060; 1020) the system information comprising the first measurement configuration in a subsequent modification period. 29. The method of claim 28, further comprising: transmitting (2055), to the at least one terminal device, a second measurement configuration via a dedicated signaling in the modification period. 30. The method of any of claims 25-29, further comprising: transmitting (2050; 3050; 4050; 5050; 6050; 7050; 1010), to the at least one terminal device, the first indication indicating the system information to be changed in at least one paging occasion per modification period. 31. The method of any of claims 22-24, wherein the at least one terminal device is a radio resource control idle state or in inactive state; and Telefonaktiebolaget LM Ericsson (publ) - 73 - 30A-162143 wherein the at least one terminal device is configured with a synchronization signal block (SSB) measurement during a radio resource control release procedure. 32. The method of claim 31, wherein the system information further indicates a validity area for the first measurement configuration. 33. The method of any of claims 22-32, wherein the system information further indicates expiry time for the first measurement configuration. 34. The method of claim 33, wherein the expiry time is indicated by one of: absolute time or a time duration. 35. The method of any of claims 22-34, wherein the first indication is a SIB modification indication transmitted in a paging message or downlink control information. 36. The method of any of claims 22-35, further comprising: receiving (2080), from the at least one terminal device, feedback information indicating whether the first measurement configuration is successfully applied. 37. The method of any of claims 22-36, further comprising: transmitting (2085), to the at least one terminal device, a second indication for releasing the first measurement configuration. 38. The method of any of claims 22-37, wherein the first measurement configuration comprises at least one of: a measurement object, a measurement identity, a reporting configuration, a quantity configuration, a measurement gap, or a list of excluded cells. 39. A terminal device (1100) comprising: at least one processor (1110); and Telefonaktiebolaget LM Ericsson (publ) - 74 - 30A-162143 at least one memory (1120), the at least one memory (1120) containing instructions executable by the at least one processor (1110), whereby the terminal device (1100) is operative to: receive, from a network device, a first indication indicating system information to be changed; receive, via a broadcast signaling from the network device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration; and update an existing measurement configuration based on the first measurement configuration. 40. The terminal device (1100) of claim 39, wherein the terminal device (1100) is operative to perform the method according to any of claims 2 to 21. 41. A network device (1100) comprising: at least one processor (1110); and at least one memory (1120), the at least one memory (1120) containing instructions executable by the at least one processor (1110), whereby the network device (1100) is operative to: transmit, to at least one terminal device, a first indication indicating system information to be changed; and transmit, via a broadcast signaling to the at least one terminal device, the system information indicated to be changed by the first indication, wherein the system information comprises a first measurement configuration that is used to update an existing measurement configuration at the at least one terminal device. 42. The network device of claim 41, wherein the network device is operative to perform the method according to any of claims 23 to 38. 43. A communication system (100), comprising: a terminal device (110; 210) that is operative to perform the method according to any of claims 1-21; and a network device (120; 220) that is operative to perform the method according to any of claims 22-38. Telefonaktiebolaget LM Ericsson (publ) - 75 - 30A-162143 44. A computer readable storage medium comprising instructions which when executed by at least one processor, cause the at least one processor to perform the method according to any of claims 1 to 38.
PCT/EP2024/058303 2023-05-12 2024-03-27 Methods and apparatuses for updating measurement configuration Pending WO2024235514A1 (en)

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