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WO2025213424A1 - Dispositif, procédé et support lisible par ordinateur pour les communications - Google Patents

Dispositif, procédé et support lisible par ordinateur pour les communications

Info

Publication number
WO2025213424A1
WO2025213424A1 PCT/CN2024/087336 CN2024087336W WO2025213424A1 WO 2025213424 A1 WO2025213424 A1 WO 2025213424A1 CN 2024087336 W CN2024087336 W CN 2024087336W WO 2025213424 A1 WO2025213424 A1 WO 2025213424A1
Authority
WO
WIPO (PCT)
Prior art keywords
network device
terminal device
resources
rnti
sbfd
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/CN2024/087336
Other languages
English (en)
Inventor
Bohang ZHANG
Gang Wang
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.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to PCT/CN2024/087336 priority Critical patent/WO2025213424A1/fr
Publication of WO2025213424A1 publication Critical patent/WO2025213424A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • Embodiments of the present disclosure generally relate to the field of communication, and in particular, to devices, methods and computer readable medium for the random access under the subband non-overlapping full duplex (SBFD) operation.
  • SBFD subband non-overlapping full duplex
  • TDD Time Division Duplex
  • a time symbol may be configured as an uplink (UL) symbol, a downlink (DL) symbol or a flexible symbol.
  • UL uplink
  • DL downlink
  • BWP bandwidth part
  • carrier can be used for communication of corresponding link direction (for example, UL or DL) .
  • a subband non-overlapping full duplex (SBFD) operation was proposed on the basis of TDD pattern.
  • SBFD operation a time unit (for example, a symbol, slot, sub-frame, frame, and so on) which may be also referred to as an SBFD time unit can be divided into a plurality of frequency subbands in the frequency domain.
  • the plurality of frequency subbands may be respectively used for different link directions, for example, uplink (UL) frequency subband or downlink (DL) frequency subband. That is, for example, on a DL symbol configured as an SBFD symbol, the network device may perform the DL transmission on the DL subband and perform the UL reception on the configured UL subband during this DL symbol.
  • UL uplink
  • DL downlink
  • the BWP during a SBFD time unit (for example, this DL symbol) can be divided into multiple subbands that each is configured for one link direction.
  • the SBFD operation may be utilized to optimize the random access procedure, for example, increasing the random access channel (RACH) capacity.
  • example embodiments of the present disclosure relate to devices, methods, and computer readable medium for the enhancement of the random access.
  • a terminal device comprising a processor.
  • the processor is configured to cause the terminal device to receive, from a network device, a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority.
  • a time unit for an SBFD operation is configured with frequency subbands for different link directions.
  • the terminal device is further caused to receive, from the network device, a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • RACH random access channel
  • the terminal device is further caused to transmit, to the network device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • a network device comprising a processor.
  • the processor is configured to cause the network device to transmit a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority.
  • a time unit for an SBFD operation is configured with frequency subbands for different link directions.
  • the network device is further caused to transmit a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • RACH random access channel
  • the network device is further caused to receive, from a terminal device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • a first network device comprising a processor.
  • the processor is configured to cause the first network device to transmit, to at least one of a terminal device or a second network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the first network device is further caused to receive, on the set of resources, an Msg 3 from the terminal device.
  • a second network device comprising a processor.
  • the processor is configured to cause the second network device to receive, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with a terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the second network device is further caused to adjust a downlink (DL) transmission on the set of resources.
  • DL downlink
  • a terminal device comprising a processor.
  • the processor is configured to cause the terminal device to receive, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the terminal device is further caused to transmit, on the set of resources, an Msg 3 to the first network device.
  • a network device comprising a processor.
  • the processor is configured to cause the network device to transmit, to a terminal device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels.
  • the one or more UL-DL configurations are related to at least one neighboring network device.
  • the network device is further caused to transmit a reference signal.
  • a terminal device comprising a processor.
  • the processor is configured to cause the terminal device to receive, by a terminal device and from a network device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels.
  • the one or more UL-DL configurations are related to at least one neighboring network device.
  • the terminal device is further caused to determine a target UL-DL configuration from the one or more UL-DL configurations.
  • the terminal device is further caused to perform, based on a target RSRP level associated with the target UL-DL configuration, a measurement on a reference signal from the network device.
  • the terminal device receives, from a network device, a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority.
  • a time unit for an SBFD operation is configured with frequency subbands for different link directions.
  • the terminal device receives, from the network device, a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • RACH random access channel
  • the terminal device transmits, to the network device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • the network device transmits a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority.
  • a time unit for an SBFD operation is configured with frequency subbands for different link directions.
  • the network device transmits a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • the network device receives, from a terminal device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • RACH random access channel
  • a method implemented at a first network device the first network device transmits, to at least one of a terminal device or a second network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the first network device receives, on the set of resources, an Msg 3 from the terminal device.
  • the second network device receives, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with a terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the second network device adjusts a downlink (DL) transmission on the set of resources.
  • a method implemented at a terminal device receives, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the terminal device transmits, on the set of resources, an Msg 3 to the first network device.
  • a method implemented at a network device transmits, to a terminal device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels, wherein the one or more UL-DL configurations are related to at least one neighboring network device. Then, the network device transmits a reference signal.
  • UL uplink
  • DL downlink
  • RSRP reference signal received power
  • the terminal device receives, by a terminal device and from a network device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels.
  • the one or more UL-DL configurations are related to at least one neighboring network device.
  • the terminal device determines target UL-DL configuration from the one or more UL-DL configurations. Then, the terminal device performs based on a target RSRP level associated with the target UL-DL configuration, a measurement on a reference signal from the network device.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method of any of the eighth aspect to the fourteenth aspect.
  • FIG. 1A illustrates an example environment in which some embodiments of the present disclosure can be implemented
  • FIG. 1B illustrates example comparisons of random access procedures under the SBFD operation and typical time division duplex (TDD) pattern
  • FIG. 1C illustrates an example signaling process of four-step random access
  • FIG. 1D illustrates an example signaling process of two-step random access
  • FIG. 2 illustrates an example signaling process for the random access procedure under the SBFD operation according to some embodiments of the present disclosure
  • FIG. 3A illustrates another example signaling process for the random access procedure under the SBFD operation according to some embodiments of the present disclosure
  • FIG. 3B illustrates a field description of the part in downlink control information (DCI) of Msg 2 that indicates a set of resource for Msg 3;
  • DCI downlink control information
  • FIG. 3C illustrates a field description of the part in downlink control information (DCI) of Msg 4 that indicates a further set of resource for ACK of Msg 4;
  • DCI downlink control information
  • FIG. 4 illustrates a further example signaling process for the reference signal measurement under the SBFD operation according to some embodiments of the present disclosure
  • FIG. 5 illustrates an example of a measurement configuration for the reference signals
  • FIG. 6 illustrates examples of a UL-DL configuration according to some embodiments of the present disclosure
  • FIG. 7 illustrates a flowchart of an example method implemented at a terminal device according to some embodiments of the present disclosure
  • FIG. 8 illustrates a flowchart of an example method implemented at a network device according to some embodiments of the present disclosure
  • FIG. 9 illustrates a flowchart of an example method implemented at a first network device according to some embodiments of the present disclosure
  • FIG. 10 illustrates a flowchart of an example method implemented at a second network device according to some embodiments of the present disclosure
  • FIG. 11 illustrates a flowchart of an example method implemented at a terminal network device according to some embodiments of the present disclosure
  • FIG. 12 illustrates a flowchart of an example method implemented at a network device according to some embodiments of the present disclosure
  • FIG. 13 illustrates a flowchart of an example method implemented at a terminal device according to some embodiments of the present disclosure
  • FIG. 14 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Small Data Transmission (SDT) , mobility, Multicast and Broadcast Services (MBS) , positioning, dynamic/flexible duplex in commercial networks, reduced capability (RedCap) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eX
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may be also incorporated one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal, a wireless device or a reduced capability terminal device.
  • the term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , Network-controlled Repeaters, and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a
  • the terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • the terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz –7125 MHz) , FR2 (24.25 GHz to 71 GHz) , 71 GHz to 114 GHz, and frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • the terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario.
  • MR-DC Multi-Radio Dual Connectivity
  • the terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
  • the network device may have the function of network energy saving, Self-Organizing Networks (SON) /Minimization of Drive Tests (MDT) .
  • the terminal may have the function of power saving.
  • test equipment e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
  • the embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future.
  • Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
  • the terminal device may be connected with a first network device and a second network device.
  • One of the first network device and the second network device may be a master node and the other one may be a secondary node.
  • the first network device and the second network device may use different radio access technologies (RATs) .
  • the first network device may be a first RAT device and the second network device may be a second RAT device.
  • the first RAT device is eNB and the second RAT device is gNB.
  • Information related with different RATs may be transmitted to the terminal device from at least one of the first network device and the second network device.
  • first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device.
  • information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device.
  • Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
  • the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’
  • the term ‘based on’ is to be read as ‘at least in part based 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. ’
  • the terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
  • values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • the subband and the frequency subband may be used interchangeable without any limitation.
  • the group size of a RBG may be also referred to as the RBG size without any limitation.
  • the control channel may be interchangeably used with the physical downlink control channel (PDCCH) without any limitation.
  • PDCCH physical downlink control channel
  • the slot/symbol configured with SBFD communication or configuration may be also referred to as SBFD slot/symbol
  • the slot/symbol not configured with SBFD communication may be also referred to as non-SBFD slot/symbol.
  • the non-SBFD time unit may include UL slot/symbol and/or DL slot/symbol.
  • Physical Resource Block (PRB) or resource block used herein may refer to a resource base unit in the frequency domain.
  • the time unit may be any metric of the time domain.
  • the time unit may be a frame, a subframe, a slot, or a symbol.
  • the time unit may be any other time duration.
  • the expression “frequency resources within a subband of the SBFD time unit” only refers to the resources located within the subband with respect to the frequency domain; however, the time duration of the resources is unnecessary to be limited in one or more SBFD time units if the time duration is not indicated.
  • uplink (UL) control channel” and “physical uplink control channel (PUCCH) ” can be used interchangeably.
  • UL shared channel and “physical uplink shared channel (PUSCH) ” can be used interchangeably.
  • PUSCH physical uplink shared channel
  • DL downlink
  • PDCH physical downlink control channel
  • DL shared channel and “physical downlink shared channel (PDSCH) ” can be used interchangeably.
  • the term “random access procedure” refers to a sequence of signaling steps between a terminal device and a network device for the terminal device to acquire uplink synchronization and obtain specified identity (ID) for the radio access communication.
  • the 4-step random access includes four signaling steps.
  • the 2-step random access includes two signaling steps which may be referred to the step A and the step B. To discuss clarity, the four-step random access and the two-step random access are further discussed with reference to FIGS. 1B and 1C.
  • the term “cross link interference (CLI) ” refers to the interference caused by other simultaneous transmission.
  • the CLI may be caused by the same link direction transmission and/or a different link direction transmission, which is not limited in this disclosure.
  • a first network device may perform a UL reception from a terminal device during an SBFD time unit, for example, using the radio frequency resources within the uplink subband of the SBFD time unit.
  • the duration of this SBFD time unit may be configured as a DL time unit in a neighboring cell, thus the neighboring network device providing the neighboring cell may perform a DL transmission simultaneously.
  • the network device may receive or detect UL channel from the terminal device and the DL channel from the neighboring cell. That is, the DL channel from the neighboring cell may affect the UL reception of the network device.
  • the similar interference situation may be referred to as CLI interference.
  • a terminal device may perform a DL reception while a neighboring terminal device may perform a UL transmission simultaneously. In this case, the UL transmission from the neighboring terminal device may cause the CLI at the terminal device.
  • the term “feature priority” indicates priorities for features, such as reduced capability (RedCap) , Slicing, small data transmission (SDT) , message 1 (MSG1) -Repetitions and message 3 (MSG3) -Repetitions. These priorities are used to determine which feature combination the terminal device shall use when a feature maps to more than one feature combinations. In some examples, a lower value means a higher priority.
  • the network does not signal the same priority for more than one feature. The network signals a priority for all feature that map to at least one feature combination.
  • the “feature combination” may be associated with a respective physical random access channel (PRACH) resource set.
  • PRACH physical random access channel
  • the terminal device may use the PRACH resource set associated with the RedCap priority or the priority combination including the RedCap priority to transmit the PRACH.
  • the network may be aware that the terminal device is a RedCap UE, such that the corresponding operation may be applied.
  • the term “radio network temporary identifier (RNTI) ” refers to the identifier which may be used to distinguish the terminal devices in the random access.
  • the RNTI may include random access (RA) -RNTI, cell -RNTI (C-RNTI) , and so on.
  • the RNTI may be also referred to as “X-RNTI” .
  • RA-RNTI in response to a Msg 1 from a terminal device, the network device may use a RA-RNTI to scramble a PDCCH for the Msg 2 towards this terminal device.
  • the RA-RNTI is calculated based on the resource position of the random access preamble in Msg 1.
  • the terminal device may also determine the respective RA-RNTI accordingly (since it is aware of the resource position) and use this RA-RNTI to de-scramble the PDCCH of Msg 2.
  • the PDCCH of the Msg 2 indicates the resource position for the PDSCH of the Msg 2, thus the terminal device may further receive the PDSCH of the Msg 2.
  • the network device may inform the TC-RNTI to the terminal device by the PDSCH of Msg 2.
  • the communication between the terminal device and the network device may be scrambled by the TC-RNTI until the network device specifies a C-RNTI.
  • the Msg 4 may be scrambled by the TC-RNTI.
  • the TC-RNTI may be determined as the C-RNTI after the successful random access procedure.
  • the SBFD operation may be utilized to optimize the random access procedure to, for example, increase the RACH capacity, reduce the PRACH collision and reduce the initial access latency.
  • the network device determines the SBFD-aware terminal device earlier, for example, based on Msg 1.
  • the signaling steps for the random access may be transmitted on the SBFD time unit.
  • the comparison of random access procedure in the SBFD operation or legacy TDD pattern is further discussed with reference to FIG. 1B.
  • the terminal device and the network device are able to perform the random access procedure using the SBFD time units.
  • the CLI from the neighboring cell (s) may occur.
  • the neighboring cells may use the same TDD pattern. That is, the DL time units and/or UL time units may be configured in the same way.
  • the network device and the neighboring network device may perform the UL reception or DL transmission synchronously.
  • the UL reception on the SBFD time unit may be affected by the DL transmission from the neighboring network device. That is, the CLI may occur during the SBFD operation.
  • a network device may configure a DL unit in the same TDD pattern as the SBFD time unit.
  • the UL transmission on this SBFD time unit may be affected by the DL transmission from a neighboring network device, since this DL unit may be not changed by the neighboring network device to as other time unit type.
  • the measurement on the reference signal may be further optimized with respect to the SBFD operation.
  • the reason is that the reference signal received power (RSRP) may be significantly different between the SBFD operation and the legacy operation.
  • RSRP reference signal received power
  • the example embodiments of the disclosure propose solutions for the random access under the SBFD operation.
  • a terminal device receives, from a network device, a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority.
  • SBFD subband non-overlapping full duplex
  • a time unit for the SBFD is configured with frequency subbands for different link directions.
  • the terminal device receives, from the network device, a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • RACH random access channel
  • the terminal device further transmits, to the network device, an RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • some parameters regarding SBFD operation may be defined in a broadcast message of a cell.
  • the terminal device may indicate to the network its SBFD capability earlier based on these parameters, in order to increase the random access capacity.
  • a first network device transmits, to at least one of a terminal device or a second network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the first network device further receives, on the set of resources, an Msg 3 from the terminal device.
  • the first network device may indicate the Msg 3 resources to at least one of neighboring cells. As such, the neighboring cell may schedule their transmissions to avoid the potential CLI.
  • a network device transmits, to a terminal device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels. Then, the network device transmits a reference signal.
  • the RSRP level (or RSRP range) can specific to the UL-DL configuration related to the neighboring network device. As such, the power can be saved on demand.
  • the RACH capacity can be increased. Moreover, the associated messages in the random access are also improved accordingly.
  • FIG. 1A illustrates an example environment 100 in which example embodiments of the present disclosure can be implemented.
  • the environment 100A which may be a part of a communication network, comprises a terminal device 110, a first network device 120 and a second network device 130.
  • the communication network may include NTN, NB-IoT and/or eMTC.
  • the communication network may include any other possible communication network. It is to be understood that the number of network devices and terminal devices is given only for illustration without suggesting any limitations.
  • the communication network may include any suitable number of network devices and/or terminal devices adapted for implementing embodiments of the present disclosure. Although not shown, it would be appreciated that one or more terminal devices may be located in the environment 100A. Without any limitation, the network devices 120 and 130 supports the SBFD operation.
  • the first network device 120 may transmit a downlink (DL) channel to the terminal device 110 and receive an UL channel from another terminal device, simultaneously.
  • the first network device 120 may transmit signal (s) in a downlink (DL) channel to the terminal device 110 and receive signal (s) in an UL channel from another terminal device, simultaneously.
  • the terminal device 110 may initiate a random access (procedure) with the network device 120 to implement uplink synchronization and obtain specified identity (ID) for the radio access communication.
  • the random access procedure may be the above 4-step random access or the 2-step random access.
  • the signaling for example, Msg 1, Msg 2, Msg A or Msg B
  • the SBFD time unit without any limitation.
  • the data transmission in the cell provided by second network device 130 may affect the random access procedure between the first network device 120 and the terminal device 110, for example, causing CLI at the network device 120.
  • FIG. 1A the number of units and other objects in FIG. 1A is provided merely for the purpose of illustration without implying any limitations to the device environment 100A.
  • the environment 100 may include any suitable number of functionality units configured to implement example embodiments of the subject disclosure.
  • one or more terminal devices may be located in the environment 100A.
  • FIG. 1B illustrates example comparisons of random access procedure in the SBFD operation and typical time division duplex (TDD) pattern.
  • the determination of the SBFD-aware terminal device may affect the RACH procedure of the corresponding terminal device. Specifically, the earlier the determination of the SBFD-aware terminal device, the more uplink resources can be utilized. As shown in FIG. 1B, if the terminal device is determined as the SBFD-aware terminal device after the random access procedure, the signaling steps for the random access should be transmitted in time units for the respective link direction. For example, the Msg 2 from the network device to the terminal device can only be transmitted in the DL time unit or the flexible time unit. However, assuming that the network device determines the SBFD-aware terminal device earlier, for example, based on Msg 1.
  • the signaling steps for the random access may be transmitted on the SBFD time unit.
  • the terminal device may also transmit Msg 3 in the DL time unit configured as the SBFD time unit.
  • FIG. 1C illustrates an example signaling process 100C of four-step random access.
  • the process 100C will be described with reference to FIG. 1A.
  • random access procedure refers to a sequence of signaling steps between a terminal device and a network device for the terminal device to acquire uplink synchronization and obtain specified identity (ID) for the radio access communication.
  • ID specified identity
  • the 4-step random access includes four signaling steps.
  • the terminal device transmits a message 1 (Msg 1) 140 including random access preambles (which may be also referred to physical random access channel, PRACH) to a network device to initiate the random access.
  • Msg 1 message 1
  • PRACH physical random access channel
  • the network device transmits a random access response (RAR) , i.e., PDSCH of the message 2 (Msg 2) 150, for the random access preambles to the terminal device.
  • RAR random access response
  • the terminal device transmits a message 3 (Msg 3) 160 using the resources allocated in the RAR to the network device.
  • the network device transmits a message 4 (Msg) 4 170 to the terminal device.
  • Msg message 4
  • the Msg 3 and Msg 4 may be used for the contention-based solution.
  • the random access procedure may be also contention-free.
  • the hybrid automatic repeat request (HARQ) mechanism is adopted for the Msg 4. Once receiving the Msg4 and determining the random access is successful, the terminal device is required to transmit a HARQ-ACK message for the Msg 4 to the network device.
  • HARQ hybrid automatic repeat request
  • the network device 120 when the network device 120 receives Msg 3 using the SBFD time unit, it is possible that the neighboring network device (e.g., the network device 130) transmits a DL channel simultaneously. This may cause CLI at the network device 120. Furthermore, when the network device 120 receives an acknowledge (ACK) message for Msg 4 170, the CLI may also occur similarly.
  • ACK acknowledge
  • FIG. 1D illustrates an example signaling process 100D of two-step random access.
  • the process 100D will be described with reference to FIG. 1A.
  • the 2-step random access includes two signaling steps which may be referred to the step A and the step B.
  • the terminal device transmits a message A (Msg A) to the network device to initiate the 2-step random access.
  • Msg A may be similar as that of the Msg 1 and Msg 3 in the 4-step random access.
  • the network device transmits a message B (Msg B) to the terminal device.
  • the function of the Msg B may be similar as the function of the Msg 3 and Msg 4 in the 4-step random access.
  • the terminal devices may transmit, on the same time-frequency PRACH resources, Msg A including random access preambles that are spread by orthogonal code sequences.
  • the network device may transmit the respective Msg B including RARs.
  • FIG. 2 illustrates an example signaling process 200 for the random access procedure under the SBFD operation according to some embodiments of the present disclosure.
  • the process 200 will be described with reference to FIG. 1A. It would be appreciated that although the process 200 has been described with respect to communication environment of FIG. 1A, this process 200 may be likewise applied to other communication environments.
  • the network device 120 transmits (210) a broadcast message 215 to the terminal device 110.
  • the broadcast message 215 indicates one or more feature priorities including a subband non-overlapping full duplex (SBFD) priority.
  • the broadcast message 215 may include any one or more of the following feature priorities: SBFD, RedCap, Slicing, SDT, MSG1-Repetitions and MSG3-Repetitions.
  • the broadcast message 215 may be any message that is broadcast in the cell provided by the network device 120.
  • the broadcast message may include, but not limited to, a system information block (SIB) 1, SIB 2, ..., SIB 19, and so on.
  • SIB system information block
  • SIB system information block
  • the SBFD priority is the highest priority among the one or more feature priorities included in the broadcast 215.
  • the network may support the SBFD operation preferrly.
  • the terminal device 110 receives (220) the broadcast message 215 accordingly.
  • parameters for the initial access of SBFD-aware terminal devices are defined in the broadcast message, e.g., in the SIB 1.
  • some SBFD-aware terminal devices may select associated RACH resources to indicate to the network that these terminal devices are capable of SBFD operations.
  • the network device 120 further transmits (230) a random access channel (RACH) configuration 235 to the terminal device 110.
  • the RACH configuration 235 indicates a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • the RACH configuration 235 indicates a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • the SBFD priority as an example, in the resource pool, there may be a first set of resources that is associated with the SBFD priority, or associated with a priority combination including the SBFD priority.
  • the terminal device 110 can select the first set of resources to transmit RACH to indicate to the network device its SBFD-aware terminal device identity. That is, Msg 1 from the SBFD-aware terminal device can be enabled to indicate the SBFD operation information implicitly.
  • the RACH configuration is carried in a radio resource control (RRC) signaling.
  • RRC radio resource control
  • the priority combination including SBFD priority e.g., SBFD-R1x
  • SBFD priority may be as below.
  • SBFD within the field may be not limited as above, for example, the spare 3 item or spare 2 item may be replaced with the SBFD-R17.
  • SBFD priority may be also comply with FeatureCombination-r19 or other versions of FeatureCombination.
  • the RACH configuration 235 may be transmitted in the broadcast message 215.
  • the network device 120 may indicate the RACH configuration and the one or more feature priority features including the SBFD priority using the same broadcast message 215, for example, using the SIB 1.
  • a SBFD-ConfigCommon-r1x indication may be as below.
  • SBFD-ConfigCommon-r1x is not limited in the SIB field.
  • SBFD-ConfigCommon-r1x may be under SIB 1 version 1900 or any other versions.
  • the network device 120 may also transmit the RACH configuration 255 in any other messages.
  • the network device 120 may transmit the broadcast message 215 and the RACH configuration 235 individually.
  • the network device 120 may transmit the RACH configuration 235 in another broadcast message.
  • the terminal device 110 transmits (250) an RACH 255 using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority to the network device 120.
  • the terminal device 110 may use the first set of resources associated with the SBFD priority to transmit the RACH 255.
  • the network device 120 may determine (265) that the terminal device 110 is the SBFD-aware terminal device by the RACH resources (i.e., the first set of resources) used by the RACH 255.
  • the network device 120 may transmit Msg 2 (for example, random access response, RAR) 275 on the SBFD time unit.
  • Msg 2 for example, random access response, RAR
  • the network device 120 may use resources within a DL subband of the SBFD time unit to transmit the RAR 275.
  • the network may be aware of the SBFD-aware terminal device once the terminal device initiates the random access by transmitting the RACH.
  • the random access procedure may be optimized under the SBFD operation.
  • the CLI may occur during the SBFD operation.
  • Some of following embodiments may enable the network device to alleviate the CLI during the SBFD operation.
  • FIG. 3A illustrates another example signaling process 300 for the random access procedure under the SBFD operation according to some embodiments of the present disclosure.
  • the process 200 will be described with reference to FIG. 1A. It would be appreciated that although the process 200 has been described with respect to communication environment of FIG. 1A, this process 200 may be likewise applied to other communication environments.
  • the network device 120 may be also referred to as the first network device 120 and the network device 130 may be also referred to as the second network device 130.
  • the first network device 120 transmits (310 and/or 317) resource information (313 and/or 318) to at least one of the terminal device 110 or the second network device 130.
  • the resource information indicates a set of resources for a message 3 (Msg 3) associated with the terminal device 110.
  • the set of resources indicated by the resource information may be within an SBFD time unit.
  • the first network device 120 may transmit Msg 3 using the SBFD time unit.
  • the set of resources may be in any other types of the time unit, for example, UL, DL or flexible time unit.
  • the set of resources is derivable by the second network device 130 from the resource information.
  • the neighboring network devices may adjust respective transmissions on the set of resources, in order to alleviate the CLI caused at the first network device 120.
  • the first network device 120 may transmit (310) the resource information 313 in Msg 2 for the terminal device 110.
  • the first network device 120 may transmit (310) the resource information 315 in RAR of Msg 2 to the terminal device 110.
  • Msg 2 is usually scrambled by a radio network temporary identifier (RNTI) , for example, the random access (RA) -RNTI.
  • RNTI radio network temporary identifier
  • the RA-RNTI is calculated based on the RACH resources selected by the terminal device 110 for Msg 1, for example, the first radio frame for Msg 1, a carrier for Msg 1 and so on.
  • both the terminal device 110 and the first network device 120 are aware of the RA-RNTI value or are aware how to calculate the RA-RNTI. Then, the first network device 120 may use the calculated RA-RNTI to scramble Msg 2 towards the terminal device, and transmit the scrambled Msg 2 to the terminal device 110.
  • RA-RNTI 1 + s_id + 14 ⁇ t_id + 14 ⁇ 80 ⁇ f_id + 14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id (1)
  • an RA-RNTI of fifteen (15) bit sequence is able to distinguish the used preamble already.
  • the RA-RNTI is set as a sixteen (16) bit sequence for the future redundancy usage.
  • one bit of the sixteen-bit sequence of the RNTI is not occupied for distinguishing the preamble (UE) .
  • this one bit may be also referred to the “unused bit” in the RNTI.
  • the second network device 130 cannot determine the RA-RNTI for Msg 2, and the second network device 130 cannot determine the set of resources for Msg 3 accordingly.
  • At least a portion of the RNTI for Msg 2 may be predefined, so that the second network device 130 may derive the set of resources for Msg 3 associated with the terminal device 110 from resource information 313 in RAR.
  • the at least one portion may be the part of the RNTI which is applied to the resource information in RAR.
  • One RNTI may be a bit sequence including sixteen bits.
  • the resource information is further discussed with reference to FIG. 3B.
  • the resource information may be a part of DCI in PDCCH of RAR.
  • FIG. 3B illustrates a field description of the part in downlink control information (DCI) of Msg 2 that indicates a set of resource for Msg 3.
  • DCI downlink control information
  • the resource information may include the frequency domain resource assignment field, the time domain resource assignment, the virtual resource block (VRB) -to-physical resource block (PRB) mapping field, the modulation and coding scheme field, transport block (TB) field and reserved field.
  • the set of resources may be determined based on these fields included in the resource information.
  • FIG. 3B further illustrates the bit number of the respective field.
  • the VRB-to-PRB mapping field may include one bit.
  • FIG. 3B further illustrates some references of the respective fields.
  • a portion of the RNTI may be applied to these fields in DCI of RAR. For example, this portion of RNTI may be used to scramble these fields.
  • Table 1 schematically shows a RAR scrambled by a legacy RNTI from the perspective of the second network device 130.
  • the second network device 130 cannot determine any information in RAR scrambled by the RNTI (i.e., the RA-RNTI) .
  • the second network device 130 cannot derive the identifier information, frequency information, time information and UL/SUL indicator information from the RAR which are “masked” by the RNTI.
  • the portion of the RNTI which is applied to the set of resources is predefined, for example, the bits in this portion is predefined as “0, 0, ..., 0” or “1, 1, ..., 1” or any other known sequence.
  • the second network device 130 is able to derive the set of resources for Msg 3 from RAR.
  • Table 2 schematically shows a RAR scrambled by RNTI having a predefined portion from the perspective of the second network device 130.
  • the second network device 130 may derive the indicated set of resources for Msg 3 from RAR.
  • the second network device 130 may derive identifier information, frequency information and timer information from RAR.
  • the portion applied to the resource information among the 16-bit sequence may be determined as the predefined at least one portion. Only as examples, the predefined portion may be “00000” , “11111” , “10101” , “01000” , and any other predefined bit sequence. In this case, this portion is also known to the second network device 130.
  • the second network device 130 may adjust its transmissions accordingly which will be discussed below in detail. Only predefining this portion may protect other information associated with the terminal device 110. In addition, a greater portion of the RNTI or the whole RNTI may be also predefined without any limitation.
  • RNIT values may be agreed in advance, therefore allowing other devices to decode time and frequency information in PDCCH or downlink control information (DCI) in RAR.
  • DCI downlink control information
  • the terminal device 110 may finely select (301) RACH resources for transmitting RACH.
  • the RACH occasions may be selected to fit the RA-RNTI values having the predefined portion.
  • the preambles for RACH related to SBFD operation may be set or selected, in order to obtain the RA-RNTI values which are “transparent” RNTI from the perspective of the second network device 130.
  • the terminal device 110 may select (301) a first set of random access channel (RACH) resources such that to calculate the corresponding RNTI having the at least one predefined portion. Then, the terminal device 110 may transmit (302) the RACH 303 (which may be also referred to as a first RACH) using the first set of RACH resources. As such, after receiving (304) the first RACH 303, the first network device 120 may calculate the RNTI having the at least one predefined portion accordingly. Then, the first network device 120 may transmit RAR scrambled by this RNTI to the terminal device 110. Meanwhile, the second network device 130 may detect the resource information in RAR towards the terminal device 110, for example, by using the at least one predefined portion.
  • RACH random access channel
  • the first network device 120 may transmit location information of a control resource set (CORESET) associated with the terminal device 110 to the second network device 130 in advance.
  • CORESET control resource set
  • the second network device 130 may use the at least one predefined portion to detect the PDCCH or downlink control information (DCI) of RAR towards the terminal device 110. Then, the second network device 130 may derive the set of resources for Msg 3 based on detecting PDCCH.
  • the first network device 120 may transmit, to the terminal device 110, an indication of random access channel (RACH) resource set associated with the RNTI having the at least one portion.
  • RACH random access channel
  • the first network device 120 may transmit a resource table to the terminal device 110, and the resource table indicates a plurality of preambles from the preamble resource pool (for example, 64 preambles) . Moreover, based on the plurality of preambles, the RA-RNTI having the at least one portion will be calculated. In this case, the SBFD-aware terminal device may transmit the first RACH using one of the plurality preambles indicated in the resource table. Then, the first network device 120 may calculate the RNTI having the at least one portion accordingly.
  • the preamble resource pool for example, 64 preambles
  • the first network device 120 may indicate to the terminal device the preambles which may cause to calculate the RNTI having the portion “01000” applied to the resource information. Then, the terminal device 110 may use one of the indicated preamble to initiate the RACH procedure.
  • the first network device 120 may directly adjust a calculated RNTI to be the RNTI having the predefined at least one portion regardless of the used RACH resources.
  • the terminal device 110 may arbitrarily select the RACH resources (for example, a preamble) for Msg 1 without considering the result of RA-RNTI. Then, the terminal device 110 may transmit a second RACH using the selected RACH resources. In this case, after receiving the second RACH, the first network device 120 may calculate an initial RNTI accordingly.
  • the first network device 120 may further adjust the initial RNTI to obtain the final RNTI having the at least one portion to alleviate the potential CLI.
  • the first network device 120 may transmit RAR that is scrambled by the final RNTI.
  • the second network device 130 may also derive the set of resources from RAR.
  • the fine selection of the RACH resources and the adjustment of the initial RA-RNTI may be used in a combination manner.
  • a bit in the RNTI may indicate whether the resource information (or the set of resources) is derivable by the second network device 130.
  • the first network device 120 may set the state of this unused bit to indicate whether the RNTI have a predefined portion or not, i.e., whether the set of resources is derivable by the second network device 130 or not.
  • the unused bit in RNTI is set as “1” , it may indicate that the RNTI has the predefined portion. In other words, the bit “1” may indicate that this RNTI is configured for SBFD operation. Otherwise, if the unused bit in RNTI is set as “0” , it may indicate that the RNTI has no predefined portion. In this way, the second network device 130 may further check whether the RAR is associated with SBFD operation.
  • the resource information indicating the set of resources may be also shared between network devices.
  • the first network device 120 may directly transmit (317) the resource information 318 to the second network device 130 via an interface between the network devices.
  • the interface may include Xn interface between network devices.
  • the first network device 120 may directly transmit DCI information indicating the set of resources to the second network device 130.
  • the second network device 130 adjusts (330) DL transmissions (if any) on the derived set of resources to alleviate the potential CLI.
  • the second network device 130 may refrain from performing the DL transmission on the set of resources.
  • the second network device 130 may block off corresponding DL resources to ensure that the first network device 120 can have successful random access procedure.
  • the second network device 130 may reduce power for the DL transmission on the set of resources.
  • the terminal device 110 transmits (337) Msg 3 335 on the set of resources indicated by the resource information in the RAR.
  • the second network device 130 adjusts its DL transmission based on the derivable resource information
  • the first network device 120 receives (332) Msg 3 335 with a higher successful rate.
  • the CLI may also occur during a transmission of an acknowledge (ACK) message for the Msg 4.
  • ACK acknowledge
  • the first network device 120 receives the ACK message on an SBFD time unit from the terminal device 110 while the second network device 130 may transmit the DL transmission simultaneously.
  • the CLI may occur at the first network device 120.
  • the first network device 120 may transmit (339) Msg 4 339 to the terminal device 110.
  • This Msg 4 339 may include further resource information indicating a further set of resources for an acknowledge (ACK) message. Only for discussion purposes, the further resource information is further discussed with reference to FIG. 3C.
  • the resource information may be a part of DCI in PDCCH of Msg 4.
  • FIG. 3C illustrates a field description of the part in downlink control information (DCI) of Msg 4 that indicates a further set of resource for the ACK of Msg 4.
  • DCI downlink control information
  • the further resource information may include the frequency domain resource assignment field, the time domain resource assignment, the virtual resource block (VRB) -to-physical resource block (PRB) mapping field, the modulation and coding scheme field, new data indicator field, redundancy version field, HARQ process number field, downlink assignment index field, transmit power control (TPC) command for scheduled PUCCH field, PUCCH resource indicator field, and PDSCH-to HARQ_feedback timing indicator field.
  • the further set of resources may be determined based on these fields in the further resource information.
  • FIG. 3C further illustrates the bit number of the respective field.
  • the VRB-to-PRB mapping field may include one bit.
  • FIG. 3C further illustrates some references of the respective fields.
  • a portion of the further RNTI may be applied to these fields in DCI of RAR. For example, this portion of the further RNTI may be used to scramble these fields.
  • the further set of resource is derivable by the second network device from the Msg 4.
  • the Msg 4 may be scrambled by a further RNTI.
  • the further RNTI may be a temporary cell (TC) -RNTI.
  • at least a portion of the further RNTI may be predefined. That is, the at least one portion of the further RNTI is known to the second network device 130.
  • the at least one portion of the further RNTI may be applied to the further resource information in Msg 4 339.
  • the second network device 130 may detect the further resource information in Msg 4 using the predefined portion of the further RNTI accordingly.
  • specific value (s) of (T) C-RNTI values may be reserved to indicate the location of RACH messages to the neighboring terminal devices. For example, defining dedicated (T) C-RNTI values for SBFD devices during Initial Access. Then, the second network device 130 may read Msg4 PDCCH information for the terminal device 110 in order to determine the frequency and time location of PUCCH for ACK message.
  • the first network device 120 may also directly transmit (341) the further resource information 342 to the second network device 130 via the Xn interface. Then, after detecting the resource information or receiving (343) the further information 342, the second network device 130 may determine the further set of resources for the ACK message 349 from the terminal device 110.
  • the second network device 130 may adjust (345) DL transmission on the further set of resources derived from the further resource information, similarly. For example, the second network device 130 may refrain from performing DL transmission on the further set of resources, or reduce the transmit power.
  • the terminal device 110 transmits (347) ACK message 349 for Msg 4 to the first network device 120
  • the first network device 120 may receive (350) the ACK message 349 with a higher successful rate. In this way, the first network device 120 may assist the second network device 130 to determine the resources for the ACK message by setting TC-RNTI.
  • the second network device 130 may assist the first network device 120 by muting corresponding transmissions.
  • the second network device may obtain the set of resources for Msg 3 through backhaul.
  • the RA-RNTI values may be set to allow neighboring network device to derive the set of resources.
  • the TC-RNTI may be also set to allow neighboring network device to derive a further set of resources for ACK message of Msg 4.
  • the random access procedure under the SBFD operation may be optimized by alleviating the potential CLI.
  • the measurement on the reference signal may be further optimized with respect to the SBFD operation.
  • FIG. 4 illustrates a further example signaling process 400 for the reference signal measurement under the SBFD operation according to some embodiments of the present disclosure.
  • the process 400 will be described with reference to FIG. 1A. It would be appreciated that although the process 400 has been described with respect to communication environment of FIG. 1A, this process 400 may be likewise applied to other communication environments.
  • the network device 120 transmits (410) association information 415 to the terminal device 110.
  • the association information 415 indicates an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels.
  • the one or more UL-DL configurations may be related to at least one neighboring network device, for example, the second network device 130.
  • the UL-DL configuration may indicate the data link directions of a plurality of network devices in a certain geographic area during the same time period.
  • the reference signal refers to the predefined signals occupying specific resource elements within downlink or uplink time-frequency resource.
  • the network device transmits reference signals to the terminal device in the predefined rule. Then, the terminal device may measure the reference signals and transmit the measurements of the reference signals to the network device. In turn, the network device may determine the channel state and/or select the transmit/receive beams based on the measurements of the reference signal.
  • the reference signals may include, but not limited to, channel state information-reference signal (CSI-RS) , synchronization signal and physical broadcast channel block (SSB) and so on.
  • CSI-RS channel state information-reference signal
  • SSB physical broadcast channel block
  • the network device may transmit a RSRP measurement configuration to the terminal device, and the RSRP measurement configuration indicates the RSRP requirement.
  • the RSRP measurement specifies the received power level of a reference signal that is received on a respective resource block.
  • the received power level may include a RSRP range. Only for discussion purposes, the RSRP measurement configuration is further discussed with reference to FIG. 5.
  • FIG. 5 illustrates an example of a measurement configuration for the reference signals.
  • the measurement configuration of the reference signal i.e., “s_MeasureConfig”
  • s_MeasureConfig indicates one range of a reference signal received power (RSRP) for the reference signals.
  • RSRP reference signal received power
  • s_MeasureConfig specifies a RSRP-range for the RSRP of SSB, and specifies another RSRP-range for CSI-RSRP. That is, there is only one RSRP range for respective reference signal.
  • the received power is not only determined based on the reference signal on the respective time-frequency resource, but also other signals on the same time-frequency resource, for example, interference signal or noise.
  • the network devices may configure the same time period as the same time unit type to avoid the CLI.
  • the neighboring network device may configure the same time period as a DL time unit, and transmit DL transmission at the same time.
  • the signals from more than one neighboring network devices may cause a higher received power level.
  • the corresponding RSRP level may be configured as a higher value.
  • the second network device 130 may perform UL reception when the first network device 120 is performing the DL transmission.
  • the RSRP level may be lower than another RSRP level when the second network device 130 is also performing the DL transmission.
  • the one RSRP level indicated in the measurement configuration may be not adopted any more.
  • the network device 120 transmits (410) the association information 415 to the terminal device 110.
  • the association information 415 indicates an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels.
  • RSRP reference signal received power
  • the plurality UL-DL configurations is preconfigured.
  • the association information may include an index and a RSRP level corresponding to the index. The index identifies a UL-DL configuration of the one or more UL-DL configurations.
  • the terminal device 110 may determine the appropriate RSRP level.
  • the network device 120 further transmits (440) reference signal (s) .
  • a target UL-DL configuration is determined (430) from the plurality of UL-DL configurations, in order to perform the measurement on reference signal (s) based on corresponding RSRP level.
  • the plurality of UL-DL configurations includes the link direction information of respective network device in different time units.
  • the terminal device 110 may determine the target UL-DL configuration based on the time occasion to arrive.
  • the mapping information between the UL-DL configurations and the time period (s) is stored at the network side.
  • the network device 120 may firstly determine (425) a target UL-DL configuration from the plurality of UL-DL configurations. For example, similarly, the network device 120 may determine the target UL-DL configuration based on the time occasion to arrive. Then, the network device 120 may transmit (427) an indication 428 of the target UL-DL configuration to the terminal device 429. After receiving (429) the indication 428, the terminal device 110 may determine the target UL-DL configuration accordingly.
  • the terminal device 110 performs (450) a measurement on the reference signal 445 based on the target UL-DL configuration.
  • the appropriate RSRP level may be determined based on SBFD operation.
  • the need for additional rounds of MeasureConfig when the time unit changes from SBFD to non-SBFD or changes between different SBFD configurations may be reduced.
  • the UL-DL configuration is further discussed with reference to FIG. 6.
  • FIG. 6 illustrates examples of a UL-DL configuration according to some embodiments of the present disclosure.
  • the X axis represents the time unit types configured by different network devices (for example, neighboring network devices) .
  • Y axis represents the time domain and the Z axis represents the frequency domain.
  • the time units in block 601 may be considered a UL-DL configuration.
  • the time unit 610 is an SBFD time unit used by a second network device 130
  • the time unit 620 is a DL time unit used by the first network device 120
  • the time unit 630 is a DL time unit used by another neighboring network device. That is, in the UL-DL configuration 601, when the first network device 120 transmits reference signals, other neighboring network devices may perform a UL reception. In this case, the associated first RSRP may be lower.
  • the time unit 640 is an SBFD time unit used by a second network device 130
  • the time unit 650 is a DL time unit used by the first network device 120
  • the time unit 660 is a DL time unit used by another neighboring network device.
  • the associated second RSRP level may be higher. That is, the second RSRP level is higher than the first RSRP level associated with the UL-DL configuration 601.
  • the terminal device may transmit the preamble associated with the SBFD priority feature to indicate its SBFD-aware terminal device identity.
  • the network device may transmit Msg B using SBFD time unit (s) .
  • the first network device may indicate to the second network device the resource information associated with signaling in the two-step random access under the SBFD operation, in order to alleviate the potential CLI.
  • FIG. 7 illustrates a flowchart of a method 700 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure.
  • the method 700 can be implemented at the terminal device 110 shown in FIG. 1A.
  • the method 700 will be described with reference to FIG. 1A. It is to be understood that the method 700 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard.
  • the terminal device 110 receives, from a network device, a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority.
  • a time unit for an SBFD operation is configured with frequency subbands for different link directions.
  • the terminal device 110 receives, from the network device, a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • RACH random access channel
  • the terminal device 110 transmits, to the network device, an RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • the terminal device may further receive, on an SBFD time unit, a random access response (RAR) message in response to the RACH.
  • RAR random access response
  • the terminal device is determined as an SBFD-aware terminal device by the network device based on the transmitted RACH.
  • the SBFD priority is the highest priority among the one or more feature priorities; the RACH configuration is received in the broadcast message, and the broadcast message comprises a system information block (SIB) 1; and/or the broadcast message is a first broadcast message and the RACH configuration is received in a second broadcast message.
  • SIB system information block
  • FIG. 8 illustrates a flowchart of a method 800 of communication implemented at a network device in accordance with some embodiments of the present disclosure.
  • the method 800 can be implemented at the network device 120 shown in FIG. 1A.
  • the method 800 will be described with reference to FIG. 1A. It is to be understood that the method 800 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard.
  • the network device 120 transmits a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority.
  • a time unit for an SBFD operation is configured with frequency subbands for different link directions.
  • the network device 120 transmits a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities.
  • RACH random access channel
  • the network device 120 receives, from a terminal device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • the network device 120 may further determine, based on the RACH, the terminal device as an SBFD-aware terminal device; and transmit, on an SBFD time unit, a random access response (RAR) message in response to the RACH.
  • RAR random access response
  • the SBFD priority is the highest level priority among the one or more feature priorities; the RACH configuration is received in the broadcast message, and the broadcast message comprises a system information block (SIB) 1; and/or the broadcast message is a first broadcast message and the RACH configuration is received in a second broadcast message.
  • SIB system information block
  • FIG. 9 illustrates a flowchart of a method 900 of communication implemented at a first network device in accordance with some embodiments of the present disclosure.
  • the method 900 can be implemented at the first network device 120 shown in FIG. 1A.
  • the method 900 will be described with reference to FIG. 1A. It is to be understood that the method 900 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard.
  • the first network device 120 transmits, to at least one of a terminal device or a second network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the first network device 120 receives, on the set of resources, an Msg 3 from the terminal device.
  • the set of resources is within an uplink subband of a subband non-overlapping full duplex (SBFD) time unit configured with frequency subbands for different link directions; and/or a downlink (DL) transmission on the set of resources is adjusted by the second network device based on the resource information.
  • SBFD subband non-overlapping full duplex
  • the adjustment of the DL transmission comprises at least one of the following: a refrainment of the DL transmission on the set of resources; or a reduction of power for the DL transmission on the set of resources.
  • the first network device 120 may transmit the resource information by: transmitting, to the terminal device, the resource information in a random access response (RAR) scrambled by a radio network temporary identifier (RNTI) . At least one portion of the RNTI is predefined.
  • RAR random access response
  • RNTI radio network temporary identifier
  • the first network device 120 may further transmit, to the terminal device, an indication of random access channel (RACH) resource set associated with the RNTI having the at least one portion.
  • RACH random access channel
  • the first network device may further receive, from the terminal device, a random access channel (RACH) on a first set of RACH resources.
  • RACH random access channel
  • the first set of RACH resources is selected for calculating the RNTI having the at least one portion.
  • the first network device may further receive a second RACH from the terminal device; calculate an initial RNTI based on the second RACH; and adjust the initial RNTI to obtain the RNTI having the at least one portion.
  • a bit of the RNTI is configured to indicate whether the resource information is derivable by the second network device.
  • the at least one portion of the RNTI is applied to the resource information in the RAR.
  • the first network device may transmit the resource information by: transmitting, via an interface between the first network device and the second network device, the resource information to the second network device.
  • the first network device may further transmit a message 4 (Msg 4) to the terminal device, wherein the Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message, and the further set of resource is derivable by the second network device from the Msg 4; and receive, on the further set of resources, the ACK message for the Msg 4 from the terminal device.
  • Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message
  • ACK acknowledge
  • the Msg 4 is scrambled by a further RNTI; at least one portion of the further RNTI is predefined; and the at least one portion of the further RNTI is applied to the further resource information in Msg 4.
  • the first network device may further transmit, to the second network device, location information of a control resource set (CORESET) associated with the terminal device.
  • CORESET control resource set
  • a RNTI comprises a random access (RA) -RNTI; and/or a further RNTI comprises a temporary cell (TC) -RNTI.
  • FIG. 10 illustrates a flowchart of a method 1000 of communication implemented at a second network device in accordance with some embodiments of the present disclosure.
  • the method 1000 can be implemented at the second network device 130 shown in FIG. 1A.
  • the method 1000 will be described with reference to FIG. 1A. It is to be understood that the method 1000 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard.
  • the second network device 130 receives, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with a terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the second network device 130 adjusts a downlink (DL) transmission on the set of resources.
  • DL downlink
  • the set of resources is within an uplink subband of a subband non-overlapping full duplex (SBFD) time unit configured with frequency subbands for different link directions.
  • SBFD subband non-overlapping full duplex
  • the second network device may adjust the DL transmission by at least one of the following: refraining from the DL transmission on the set of resources; or reducing power for the DL transmission on the set of resources.
  • the second network device may receive the resource information by: detecting the resource information in a random access response (RAR) towards the terminal device.
  • RAR random access response
  • the RAR is scrambled by a radio network temporary identifier (RNTI) and at least one portion of the RNTI is predefined.
  • RNTI radio network temporary identifier
  • a bit of the RNTI is configured to indicate whether the resource information is derivable by the second network device. In some embodiments, the at least one portion of the RNTI is applied to the resource information in the RAR.
  • the second network device may receive the resource information by: receiving, via an interface between the first network device and the second network device, the resource information from the first network device.
  • the second network device may further detect further resource information in a message 4 (Msg 4) towards the terminal device, wherein the further resource information indicates a further set of resources for an acknowledge (ACK) message of the Msg 4 and the further set of resource is derivable by the second network device from the Msg 4; and adjust a further DL transmission on the further set of resources.
  • Msg 4 message 4
  • ACK acknowledge
  • the Msg 4 is scrambled by a further RNTI; at least one portion of the further RNTI is predefined; and/or the at least one portion of the further RNTI is applied to the further resource information in the Msg 4.
  • the second network device may further receive, from the first network device, location information of a control resource set (CORESET) associated with the terminal device.
  • CORESET control resource set
  • a RNTI comprises a random access (RA) -RNTI; or a further RNTI comprises a temporary cell (TC) -RNTI.
  • RA random access
  • TC temporary cell
  • FIG. 11 illustrates a flowchart of a method 1100 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure.
  • the method 1100 can be implemented at the terminal device 110 shown in FIG. 1A.
  • the method 1100 will be described with reference to FIG. 1A. It is to be understood that the method 1100 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard.
  • the terminal device 110 receives, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device.
  • the set of resources is derivable by the second network device from the resource information.
  • the terminal device 110 transmits, on the set of resources, an Msg 3 to the first network device.
  • the set of resources is within an uplink subband of a subband non-overlapping full duplex (SBFD) time unit configured with frequency subbands for different link directions; and/or a downlink (DL) transmission on the set of resources is adjusted by the second network device based on the resource information.
  • SBFD subband non-overlapping full duplex
  • the adjustment of the DL transmission comprises at least one of the following: a refrainment of the DL transmission on the set of resources; or a reduction of power for the DL transmission on the set of resources.
  • the terminal device may receive the resource information by: receiving, from the first network device, the resource information in a random access response (RAR) scrambled by a radio network temporary identifier (RNTI) . At least one portion of the RNTI is predefined.
  • RAR random access response
  • RNTI radio network temporary identifier
  • the terminal device may further receive, from the first network device, an indication of random access channel (RACH) resource set associated with the RNTI having the at least one portion.
  • RACH random access channel
  • the terminal device may further select a first set of random access channel (RACH) resources such that to calculate the RNTI having the at least one portion; and transmit, to the first network device, a RACH on the selected first set of RACH resources.
  • RACH random access channel
  • a bit of the RNTI is configured to indicate whether the resource information is derivable by the second network device. In some embodiments, wherein the at least one portion of the RNTI is applied to the resource information in the RAR.
  • the terminal device may further receive a message 4 (Msg 4) from the first terminal device, wherein the Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message, and the further resource information is derivable by the second network device from the Msg 4; and transmit, on the further set of resources, the ACK message for the Msg 4 to the first network device.
  • Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message
  • ACK acknowledge
  • the Msg 4 is scrambled by a further RNTI; at least one portion of the further RNTI is predefined; and the at least one portion of the further RNTI is applied to the further resource information in Msg 4.
  • a RNTI comprises a random access (RA) -RNTI; and/or a further RNTI comprises a temporary cell (TC) -RNTI.
  • FIG. 12 illustrates a flowchart of a method 1200 of communication implemented at a network device in accordance with some embodiments of the present disclosure.
  • the method 1200 can be implemented at the network device 120 shown in FIG. 1A.
  • the method 1200 will be described with reference to FIG. 1A. It is to be understood that the method 900 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard.
  • the network device 120 transmits, to a terminal device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels.
  • the network device transmits a reference signal.
  • the one or more UL-DL configurations are determined based on an actual link direction on a SBFD time unit used by the at least one neighboring network device; and the SBFD time unit is configured with frequency subbands available for different link directions.
  • the one or more UL-DL configurations comprise a first UL-DL configuration and a second UL-DL configuration, and wherein: the first UL-DL configuration indicates that the at least one neighboring network device performs a UL reception on an SBFD time unit; the second UL-DL configuration indicates that the at least one neighboring network device performs a DL transmission; and a first RSRP level associated with the first UL-DL configuration is lower than or equal to a second RSRP level associated with the second UL-DL configuration.
  • the network device may further: determine a target UL-DL configuration from the one or more UL-DL configurations; and transmit, to the terminal device, an indication of the target UL-DL configuration.
  • the association information comprises an index and a RSRP level corresponding to the index; and the index identifies a UL-DL configuration of the one or more UL-DL configurations.
  • FIG. 13 illustrates a flowchart of a method 1300 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure.
  • the method 1300 can be implemented at the terminal device 110 shown in FIG. 1A.
  • the method 1300 will be described with reference to FIG. 1A. It is to be understood that the method 1300 may include additional acts not shown and/or may omit some shown acts, and the scope of the present disclosure is not limited in this regard.
  • the terminal device 110 receives, from a network device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels.
  • the terminal device 110 determines a target UL-DL configuration from the one or more UL-DL configurations.
  • the terminal device 110 performs, based on a target RSRP level associated with the target UL-DL configuration, a measurement on a reference signal from the network device.
  • the one or more UL-DL configurations are determined based on an actual link direction on a SBFD time unit used by the at least one neighboring network device; and the SBFD time unit is configured with frequency subbands available for different link directions.
  • the one or more UL-DL configurations comprise a first UL-DL configuration and a second UL-DL configuration, and wherein: the first UL-DL configuration indicates that the at least one neighboring network device performs a UL reception on an SBFD time unit; the second UL-DL configuration indicates that the at least one neighboring network device performs a DL transmission; and a first RSRP level associated with the first UL-DL configuration is lower than or equal to a second RSRP level associated with the second UL-DL configuration.
  • the terminal device may determine the target UL-DL configuration by: receiving, from the terminal device, an indication of the target UL-DL configuration.
  • the association information comprises an index and a RSRP level corresponding to the index; and the index identifies a UL-DL configuration of the one or more UL-DL configurations.
  • FIG. 14 is a simplified block diagram of a device 1400 that is suitable for implementing some embodiments of the present disclosure.
  • the device 1400 can be considered as a further example embodiment of the terminal device 110, the network device 120 or the network device 130 as shown in Fig. 1. Accordingly, the device 1400 can be implemented at or as at least a part of the above network devices or terminal devices.
  • the device 1400 includes a processor 1410, a memory 1420 coupled to the processor 1410, a suitable transceiver 1440 coupled to the processor 1410, and a communication interface coupled to the transceiver 1440.
  • the memory 1410 stores at least a part of a program 1430.
  • the transceiver 1440 may be for bidirectional communications or a unidirectional communication based on requirements.
  • the transceiver 1440 may include at least one of a transmitter 1442 and a receiver 1444.
  • the transmitter 1442 and the receiver 1444 may be functional modules or physical entities.
  • the transceiver 1440 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2/Xn interface for bidirectional communications between eNBs/gNBs, S1/NG interface for communication between a Mobility Management Entity (MME) /Access and Mobility Management Function (AMF) /SGW/UPF and the eNB/gNB, Un interface for communication between the eNB/gNB and a relay node (RN) , or Uu interface for communication between the eNB/gNB and a terminal device.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • RN relay node
  • Uu interface for communication between the eNB/gNB and a terminal device.
  • the program 1430 is assumed to include program instructions that, when executed by the associated processor 1410, enable the device 1400 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1-13.
  • the embodiments herein may be implemented by computer software executable by the processor 1410 of the device 1400, or by hardware, or by a combination of software and hardware.
  • the processor 1410 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 1410 and memory 1420 may form processing means 1450 adapted to implement various embodiments of the present disclosure.
  • the memory 1420 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1420 is shown in the device 1400, there may be several physically distinct memory modules in the device 1400.
  • the processor 1410 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 1400 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • a terminal device comprises circuitry configured to perform a method 700, 1100 or 1300.
  • a first network device comprises circuitry configured to perform a method 800, 900 or 1200.
  • a second network device comprises circuitry configured to perform a method 1000.
  • the components included in the apparatuses and/or devices of the present disclosure may be implemented in various manners, including software, hardware, firmware, or any combination thereof.
  • one or more units may be implemented using software and/or firmware, for example, machine-executable instructions stored on the storage medium.
  • parts or all of the units in the apparatuses and/or devices may be implemented, at least in part, by one or more hardware logic components.
  • FPGAs Field-programmable Gate Arrays
  • ASICs Application-specific Integrated Circuits
  • ASSPs Application-specific Standard Products
  • SOCs System-on-a-chip systems
  • CPLDs Complex Programmable Logic Devices
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some 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. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, technique terminal devices 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.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to any of Figs. 2 to 17.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.
  • embodiments of the present disclosure may provide the following solutions.
  • a terminal device comprising: a processor, and the processor is configured to cause the terminal device to: receive, from a network device, a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority, wherein a time unit for an SBFD operation is configured with frequency subbands for different link directions; receive, from the network device, a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities; and transmit, to the network device, an RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority, wherein a time unit for an SBFD operation is configured with frequency subbands for different link directions
  • RACH random access channel
  • the terminal device is further caused to: receive, on an SBFD time unit, a random access response (RAR) message in response to the RACH, wherein the terminal device is determined as an SBFD-aware terminal device by the network device based on the transmitted RACH.
  • RAR random access response
  • the SBFD priority is the highest priority among the one or more feature priorities
  • the RACH configuration is received in the broadcast message, and the broadcast message comprises a system information block (SIB) 1; or the broadcast message is a first broadcast message and the RACH configuration is received in a second broadcast message.
  • SIB system information block
  • a network device comprising: a processor, and the processor is configured to cause the terminal device to: transmit a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority, wherein a time unit for an SBFD operation is configured with frequency subbands for different link directions; transmit a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities; and receive, from a terminal device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • SBFD subband non-overlapping full duplex
  • the network device is further caused to: determine, based on the RACH, the terminal device as an SBFD-aware terminal device; and transmit, on an SBFD time unit, a random access response (RAR) message in response to the RACH.
  • RAR random access response
  • the SBFD priority is the highest level priority among the one or more feature priorities
  • the RACH configuration is received in the broadcast message, and the broadcast message comprises a system information block (SIB) 1; or the broadcast message is a first broadcast message and the RACH configuration is received in a second broadcast message.
  • SIB system information block
  • a first network device comprising: a processor, and the processor is configured to cause the first network device to: transmit, to at least one of a terminal device or a second network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device, wherein the set of resources is derivable by the second network device from the resource information; and receive, on the set of resources, an Msg 3 from the terminal device.
  • Msg 3 message 3
  • the set of resources is within an uplink subband of a subband non-overlapping full duplex (SBFD) time unit configured with frequency subbands for different link directions; or a downlink (DL) transmission on the set of resources is adjusted by the second network device based on the resource information.
  • SBFD subband non-overlapping full duplex
  • DL downlink
  • the adjustment of the DL transmission comprises at least one of the following: a refrainment of the DL transmission on the set of resources; or a reduction of power for the DL transmission on the set of resources.
  • the first network device is caused to transmit the resource information by: transmitting, to the terminal device, the resource information in a random access response (RAR) scrambled by a radio network temporary identifier (RNTI) , wherein at least one portion of the RNTI is predefined.
  • RAR random access response
  • RNTI radio network temporary identifier
  • the first network device is further caused to: transmit, to the terminal device, an indication of random access channel (RACH) resource set associated with the RNTI having the at least one portion.
  • RACH random access channel
  • the first network device is further caused to: receive, from the terminal device, a random access channel (RACH) on a first set of RACH resources, wherein the first set of RACH resources is selected for calculating the RNTI having the at least one portion.
  • RACH random access channel
  • the first network device is further caused to: receive a second RACH from the terminal device; calculate an initial RNTI based on the second RACH; and adjust the initial RNTI to obtain the RNTI having the at least one portion.
  • a bit of the RNTI is configured to indicate whether the resource information is derivable by the second network device.
  • the at least one portion of the RNTI is applied to the resource information in the RAR.
  • the first network device is caused to transmit the resource information by: transmitting, via an interface between the first network device and the second network device, the resource information to the second network device.
  • the first network device is further caused to: transmit a message 4 (Msg 4) to the terminal device, wherein the Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message, and the further set of resource is derivable by the second network device from the Msg 4; and receive, on the further set of resources, the ACK message for the Msg 4 from the terminal device.
  • Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message
  • ACK acknowledge
  • the Msg 4 is scrambled by a further RNTI; at least one portion of the further RNTI is predefined; and the at least one portion of the further RNTI is applied to the further resource information in Msg 4.
  • the first network device is further caused to: transmit, to the second network device, location information of a control resource set (CORESET) associated with the terminal device.
  • CORESET control resource set
  • a RNTI comprises a random access (RA) -RNTI; or a further RNTI comprises a temporary cell (TC) -RNTI.
  • RA random access
  • TC temporary cell
  • a second network device comprising: a processor, and the processor is configured to cause the second network device to: receive, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with a terminal device, wherein the set of resources is derivable by the second network device from the resource information; and adjust a downlink (DL) transmission on the set of resources.
  • Msg 3 message 3
  • the set of resources is within an uplink subband of a subband non-overlapping full duplex (SBFD) time unit configured with frequency subbands for different link directions.
  • SBFD subband non-overlapping full duplex
  • the second network device is caused to adjust the DL transmission by at least one of the following: refraining from the DL transmission on the set of resources; or reducing power for the DL transmission on the set of resources.
  • the second network device is caused to receive the resource information by: detecting the resource information in a random access response (RAR) towards the terminal device, wherein the RAR is scrambled by a radio network temporary identifier (RNTI) and at least one portion of the RNTI is predefined.
  • RAR random access response
  • RNTI radio network temporary identifier
  • a bit of the RNTI is configured to indicate whether the resource information is derivable by the second network device.
  • the at least one portion of the RNTI is applied to the resource information in the RAR.
  • the second network device is caused to receive the resource information by: receiving, via an interface between the first network device and the second network device, the resource information from the first network device.
  • the second network device is further caused to: detect further resource information in a message 4 (Msg 4) towards the terminal device, wherein the further resource information indicates a further set of resources for an acknowledge (ACK) message of the Msg 4 and the further set of resource is derivable by the second network device from the Msg 4; and adjust a further DL transmission on the further set of resources.
  • Msg 4 message 4
  • ACK acknowledge
  • the Msg 4 is scrambled by a further RNTI; at least one portion of the further RNTI is predefined; and the at least one portion of the further RNTI is applied to the further resource information in the Msg 4.
  • the second network device is further caused to: receive, from the first network device, location information of a control resource set (CORESET) associated with the terminal device.
  • CORESET control resource set
  • a RNTI comprises a random access (RA) -RNTI; or a further RNTI comprises a temporary cell (TC) -RNTI.
  • RA random access
  • TC temporary cell
  • a terminal device comprising: a processor, and the processor is configured to cause the terminal device to: receive, from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device, wherein the set of resources is derivable by the second network device from the resource information; and transmit, on the set of resources, an Msg 3 to the first network device.
  • Msg 3 message 3
  • the set of resources is within an uplink subband of a subband non-overlapping full duplex (SBFD) time unit configured with frequency subbands for different link directions; or a downlink (DL) transmission on the set of resources is adjusted by the second network device based on the resource information.
  • SBFD subband non-overlapping full duplex
  • DL downlink
  • the adjustment of the DL transmission comprises at least one of the following: a refrainment of the DL transmission on the set of resources; or a reduction of power for the DL transmission on the set of resources.
  • the terminal device is caused to receive the resource information by: receiving, from the first network device, the resource information in a random access response (RAR) scrambled by a radio network temporary identifier (RNTI) , wherein at least one portion of the RNTI is predefined.
  • RAR random access response
  • RNTI radio network temporary identifier
  • the terminal device is further caused to: receive, from the first network device, an indication of random access channel (RACH) resource set associated with the RNTI having the at least one portion.
  • RACH random access channel
  • the terminal device is further caused to: select a first set of random access channel (RACH) resources such that to calculate the RNTI having the at least one portion; and transmit, to the first network device, a RACH on the selected first set of RACH resources.
  • RACH random access channel
  • a bit of the RNTI is configured to indicate whether the resource information is derivable by the second network device.
  • the at least one portion of the RNTI is applied to the resource information in the RAR.
  • the terminal device is further caused to: receive a message 4 (Msg 4) from the first terminal device, wherein the Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message, and the further resource information is derivable by the second network device from the Msg 4; and transmit, on the further set of resources, the ACK message for the Msg 4 to the first network device.
  • Msg 4 comprises further resource information indicating a further set of resources for an acknowledge (ACK) message
  • ACK acknowledge
  • the Msg 4 is scrambled by a further RNTI; at least one portion of the further RNTI is predefined; and the at least one portion of the further RNTI is applied to the further resource information in Msg 4.
  • a RNTI comprises a random access (RA) -RNTI; or a further RNTI comprises a temporary cell (TC) -RNTI.
  • RA random access
  • TC temporary cell
  • a network device comprising: transmit, to a terminal device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels; and transmit a reference signal.
  • association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels; and transmit a reference signal.
  • RSRP reference signal received power
  • the one or more UL-DL configurations are determined based on an actual link direction on a SBFD time unit used by the at least one neighboring network device; and the SBFD time unit is configured with frequency subbands available for different link directions.
  • the one or more UL-DL configurations comprise a first UL-DL configuration and a second UL-DL configuration
  • the first UL-DL configuration indicates that the at least one neighboring network device performs a UL reception on an SBFD time unit
  • the second UL-DL configuration indicates that the at least one neighboring network device performs a DL transmission
  • a first RSRP level associated with the first UL-DL configuration is lower than or equal to a second RSRP level associated with the second UL-DL configuration.
  • the network device is further caused to: determine a target UL-DL configuration from the one or more UL-DL configurations; and transmit, to the terminal device, an indication of the target UL-DL configuration.
  • the association information comprises an index and a RSRP level corresponding to the index; and the index identifies a UL-DL configuration of the one or more UL-DL configurations.
  • a terminal device comprising: a processor, and the processor is configured to cause the terminal device to: receive, from a network device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels; and determine a target UL-DL configuration from the one or more UL-DL configurations; and perform, based on a target RSRP level associated with the target UL-DL configuration, a measurement on a reference signal from the network device.
  • association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels
  • RSRP reference signal received power
  • the one or more UL-DL configurations are determined based on an actual link direction on a SBFD time unit used by the at least one neighboring network device; and the SBFD time unit is configured with frequency subbands available for different link directions.
  • the one or more UL-DL configurations comprise a first UL-DL configuration and a second UL-DL configuration
  • the first UL-DL configuration indicates that the at least one neighboring network device performs a UL reception on an SBFD time unit
  • the second UL-DL configuration indicates that the at least one neighboring network device performs a DL transmission
  • a first RSRP level associated with the first UL-DL configuration is lower than or equal to a second RSRP level associated with the second UL-DL configuration.
  • the terminal device is caused to determine the target UL-DL configuration by: receiving, from the terminal device, an indication of the target UL-DL configuration.
  • the association information comprises an index and a RSRP level corresponding to the index; and the index identifies a UL-DL configuration of the one or more UL-DL configurations.
  • a method of communication comprising: receiving, by a terminal device and from a network device, a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority, wherein a time unit for an SBFD operation is configured with frequency subbands for different link directions; receiving, from the network device, a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities; and transmitting, to the network device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • SBFD subband non-overlapping full duplex
  • a method of communication comprising: transmitting, by a network device, a broadcast message that indicates one or more feature priorities comprising a subband non-overlapping full duplex (SBFD) priority, wherein a time unit for an SBFD operation is configured with frequency subbands for different link directions; transmitting a random access channel (RACH) configuration indicating a plurality of sets of resources associated with a plurality of priority combinations of the one or more feature priorities; and receiving, from a terminal device, a RACH using a first set of resources of the plurality of sets of resources which is associated with the SBFD priority.
  • SBFD subband non-overlapping full duplex
  • a method of communication comprising: transmitting, by a first network device and to at least one of a terminal device or a second network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device, wherein the set of resources is derivable by the second network device from the resource information; and receiving, on the set of resources, an Msg 3 from the terminal device.
  • Msg 3 message 3
  • a method of communication comprising: receiving, by a second network device and from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with a terminal device, wherein the set of resources is derivable by the second network device from the resource information; and adjusting a downlink (DL) transmission on the set of resources.
  • Msg 3 message 3
  • a method of communication comprising: receiving, by a terminal device and from a first network device, resource information indicating a set of resources for a message 3 (Msg 3) associated with the terminal device, wherein the set of resources is derivable by the second network device from the resource information; and transmitting, on the set of resources, an Msg 3 to the first network device.
  • Msg 3 message 3
  • a method of communication comprising: transmitting, by a network device and to a terminal device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels; and transmitting a reference signal.
  • association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels; and transmitting a reference signal.
  • a method of communication comprising: receiving, by a terminal device and from a network device, association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels; and determining a target UL-DL configuration from the one or more UL-DL configurations; and performing, based on a target RSRP level associated with the target UL-DL configuration, a measurement on a reference signal from the network device.
  • association information indicating an association between one or more uplink (UL) -downlink (DL) configurations and one or more reference signal received power (RSRP) levels
  • RSRP reference signal received power
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method according to the above embodiment.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente divulgation se rapportent à des dispositifs, des procédés et un support lisible par ordinateur visant à l'amélioration des transmissions. Selon des modes de réalisation de la présente divulgation, un dispositif terminal reçoit, en provenance d'un dispositif de réseau, un message de diffusion qui indique une ou plusieurs priorités de caractéristiques comprenant une priorité de duplex intégral sans chevauchement de sous-bandes (SBFD). Une unité de temps pour une opération de SBFD est configurée avec des sous-bandes de fréquence pour différentes directions de liaison. Le dispositif terminal reçoit, en provenance du dispositif de réseau, une configuration de canal d'accès aléatoire (RACH) indiquant une pluralité d'ensembles de ressources associées à une pluralité de combinaisons de priorité de la ou des priorités de caractéristiques. Ensuite, le dispositif terminal transmet, au dispositif de réseau, un RACH à l'aide d'un premier ensemble de ressources de la pluralité d'ensembles de ressources qui est associé à la priorité de SBFD. De cette manière, l'accès aléatoire peut être optimisé.
PCT/CN2024/087336 2024-04-11 2024-04-11 Dispositif, procédé et support lisible par ordinateur pour les communications Pending WO2025213424A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2024/087336 WO2025213424A1 (fr) 2024-04-11 2024-04-11 Dispositif, procédé et support lisible par ordinateur pour les communications

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2024/087336 WO2025213424A1 (fr) 2024-04-11 2024-04-11 Dispositif, procédé et support lisible par ordinateur pour les communications

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WO2025213424A1 true WO2025213424A1 (fr) 2025-10-16

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PCT/CN2024/087336 Pending WO2025213424A1 (fr) 2024-04-11 2024-04-11 Dispositif, procédé et support lisible par ordinateur pour les communications

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