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WO2018193303A2 - Procédé, dispositif et support lisible par ordinateur pour l'activation et la désactivation du mode wce - Google Patents

Procédé, dispositif et support lisible par ordinateur pour l'activation et la désactivation du mode wce Download PDF

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Publication number
WO2018193303A2
WO2018193303A2 PCT/IB2018/000473 IB2018000473W WO2018193303A2 WO 2018193303 A2 WO2018193303 A2 WO 2018193303A2 IB 2018000473 W IB2018000473 W IB 2018000473W WO 2018193303 A2 WO2018193303 A2 WO 2018193303A2
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WIPO (PCT)
Prior art keywords
wce mode
terminal device
wce
mode
transmitting
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.)
Ceased
Application number
PCT/IB2018/000473
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English (en)
Other versions
WO2018193303A3 (fr
Inventor
Zhe LUO
Tao Tao
Jianguo Liu
Gang Shen
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Alcatel Lucent SAS
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Alcatel Lucent SAS
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Publication of WO2018193303A2 publication Critical patent/WO2018193303A2/fr
Publication of WO2018193303A3 publication Critical patent/WO2018193303A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • 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
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Definitions

  • Embodiments of the present disclosure generally relate to communication technologies, and more particularly, to a method and device for activation and deactivation of a wideband coverage enhancement (WCE) mode.
  • WCE wideband coverage enhancement
  • WCE wideband coverage enhancement
  • the maximum coupling loss (MCL) is introduced to describe the coverage performance.
  • MCL maximum coupling loss
  • MF standardization 1.0 the MCL of physical channels in DL is much lower than that of physical channels in UL because DL transmit power is limited in unlicensed spectrum and terminal devices are equipped with low-complexity receivers. Therefore, WCE in MF standardization 1.1 focuses on increasing the DL coverage performance to the level of UL coverage performance.
  • the embodiments of the present disclosure provide a method implemented at a network device.
  • the method comprises: receiving from a terminal device information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at the terminal device.
  • the method further comprises: in response to determining to activate the WCE mode or the non-WCE mode at the terminal device based on the received information, transmitting an instruction for activating the WCE mode or the non-WCE mode to the terminal device.
  • WCE wideband coverage enhancement
  • the embodiments of the present disclosure provide a method implemented at a terminal device.
  • the method comprises: in response to being in a non-radio resource control (RRC)-idle state, transmitting to a network device information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at the terminal device, and in response to receiving an instruction for activating the WCE mode or the non-WCE mode, entering the WCE mode or the non-WCE mode for operation.
  • RRC non-radio resource control
  • WCE wideband coverage enhancement
  • the method further comprises: in response to being in an RRC-idle state, autonomously activating the WCE mode or the non-WCE mode.
  • the embodiments of the present disclosure provide a method implemented at a network device.
  • the method comprises: receiving, from a further network device that is a handover source of a terminal device, information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at the terminal device.
  • the method further comprises: in response to determining to activate the WCE mode or the non-WCE mode at the terminal device based on the received information, transmitting an instruction for activating the WCE mode or the non-WCE mode.
  • WCE wideband coverage enhancement
  • the embodiments of the present disclosure provide a network device.
  • the network device comprises a controller and a memory coupled to the controller.
  • the memory comprises instructions which, when executed by the controller, cause the network device to execute acts.
  • the acts comprise: receiving from a terminal device information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at the terminal device; and in response to determining to activate the WCE mode or the non-WCE mode at the terminal device on the basis of the received information, transmitting an instruction for activating the WCE mode or the non-WCE mode to the terminal device.
  • WCE wideband coverage enhancement
  • the embodiments of the present disclosure provide a terminal device.
  • the terminal device comprises a controller and a memory coupled to the controller.
  • the memory comprises instructions which, when executed by the controller, cause the terminal device to execute acts.
  • the acts comprise: in response to being in a non-radio resource control (RRC)-idle state, transmitting to a network device information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at the terminal device, and in response to receiving an instruction for activating the WCE mode or the non-WCE mode, entering the WCE mode or the non-WCE mode for operation; and in response to being in an RRC-idle state, autonomously activating the WCE mode or the non-WCE mode.
  • RRC non-radio resource control
  • the embodiments of the present disclosure provide a network device.
  • the network device comprises a controller and a memory coupled to the controller.
  • the memory comprises instructions which, when executed by the controller, cause the network device to execute acts.
  • the acts comprise: receiving, from a further network device that is a handover source of a terminal device, information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at the terminal device; and in response to determining to activate the WCE mode or the non-WCE mode at the terminal device based on the received information, transmitting an instruction for activating the WCE mode or the non-WCE mode.
  • WCE wideband coverage enhancement
  • the embodiments of the present disclosure provide a computer readable medium comprising computer executable instructions which, when executed on a device, cause the device to execute the method according to the first aspect.
  • the embodiments of the present disclosure provide a computer readable medium comprising computer executable instructions which, when executed on a device, cause the device to execute the method according to the second aspect.
  • the embodiments of the present disclosure provide a computer readable medium comprising computer executable instructions which, when executed on a device, cause the device to execute the method according to the third aspect.
  • FIG. 1 shows an exemplary wireless communication network 100 in which the embodiments of the present disclosure are implemented
  • FIG. 2 shows a flowchart of a method 200 according to the embodiments of the present disclosure
  • Fig. 3 shows a block diagram of an apparatus 300 according to the embodiments of the present disclosure
  • FIG. 4 shows a block diagram of an apparatus 400 according to the embodiments of the present disclosure
  • FIG. 5 shows a block diagram of an apparatus 500 according to the embodiments of the present disclosure.
  • Fig. 6 shows a block diagram of a communication device which is applicable to implement some embodiments of the present disclosure.
  • the term "network device” used herein refers to other entity or node with specific functionality in a base station or communication network.
  • the "base station (BS)” may represent a node B (NodeB or NB), an Evolved Node B (eNodeB or eNB), a remote radio unit (RRU), a radio-frequency head (RH), a remote radio head (RRH), a repeater, or a low power node such as a Picocell, a Femto cell and the like.
  • the terms “network device” and “base station” may be used interchangeably, and generally, the eNB is taken as an example of the network device, for the sake of discussion.
  • terminal device or "user equipment” (UE) used herein refers to any terminal device that can perform wireless communication with the network device or one another.
  • the terminal device may comprise a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a mobile station (MS) or an access terminal (AT), and the above on-board devices.
  • MT mobile terminal
  • SS subscriber station
  • PSS portable subscriber station
  • MS mobile station
  • AT access terminal
  • Fig. 1 shows an exemplary wireless communication network 100 in which the embodiments of the present disclosure may be implemented.
  • the wireless communication network 100 comprises a network device 110 and a terminal device 120.
  • Communication between the network device 110 and the terminal device 120 may be implemented according to any appropriate communication protocol, including without limitation to, the first generation (1G), the second generation (2G), the third generation (3G), the fourth generation (4G), the fifth generation (5G) and other cellular communication protocol, wireless local area network communication protocols such as Institute of Electrical and Electronics Engineers (IEEE) 802.11, and/or any other protocols that are currently known or to be developed later.
  • any appropriate communication protocol including without limitation to, the first generation (1G), the second generation (2G), the third generation (3G), the fourth generation (4G), the fifth generation (5G) and other cellular communication protocol, wireless local area network communication protocols such as Institute of Electrical and Electronics Engineers (IEEE) 802.11, and/or any other protocols that are currently known or to be developed later.
  • IEEE Institute of Electrical and Electronics Engineers
  • the communication utilizes any appropriate wireless communication technology, including without limitation to, code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), frequency division duplexing (FDD), time division duplexing (TDD), multiple input multiple output (MIMO), orthogonal frequency division multiplexing (OFDM), and/or any other technology that is currently known or to be developed in future.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • FDD frequency division duplexing
  • TDD time division duplexing
  • MIMO multiple input multiple output
  • OFDM orthogonal frequency division multiplexing
  • eMTC enhanced Machine-Type Communication
  • the basic idea for achieving coverage enhancement is to use repetitions. For example, multiple repetitions (or copies) of the same packet are repetitively transmitted in multiple sub-frames.
  • the term "repetition" refers to a copy of a signal, for example, including complete repetition, using different channel coding, etc.
  • the number of repetitions is a variable that is determined by the network device.
  • the network device never explicitly indicates "no repetitions" to terminal devices, i.e., deactivating the repetition mode of terminal devices. In other words, the repetition mode will come along with eMTC all the while. Therefore, eMTC does not consider activation and deactivation of the repetition mode, and the eMTC mechanism is not suitable for WCE in MF standardization 1.1.
  • the network device operating based on MF standardization 1.1 cannot activate or deactivate the WCE mode by detecting the coverage enhancement level based on the number of repetitions for Physical Random Access Channel, like eMTC.
  • the embodiments of the present disclosure propose the following: where the network device can obtain information on activation of a WCE mode or a non-WCE mode from the terminal device, the network device determines to activate or deactivate the WCE mode at the terminal device according to the information obtained from the terminal device; where the network device cannot obtain the information from the terminal device, the terminal device autonomously activates the WCE mode or the non-WCE mode at the terminal device. Thereby, it may be avoided that the WCE mode at the terminal device is activated unnecessarily and thus the spectrum efficiency may be increased.
  • Fig. 2 shows a flowchart of a method 200 for activating WCE mode or non-WCE mode at a terminal device according to an embodiment of the present disclosure. Acts involved in the method 200 will be described in conjunction with Fig. 1. For the sake of discussion, the method 200 will be described in conjunction with the network device 110 and the terminal device 120 as shown in Fig. 1. In Fig. 2, for example, each act on the left is executed by the terminal device 120, while each act on the right is executed by the network device 110. It should be understood the method 200 may further comprise additional acts that are not shown and/or omit acts that have been shown, and the scope of the present disclosure is not limited in this regard.
  • the terminal device 120 determines whether it is in a Radio Resource Control (RRC)-idle state. If the terminal device 120 determines it is not in the RRC-idle state, that is, the terminal device 120 is in a non-RRC-idle state, the terminal device 120 transmits at block 202 to the network device 110 information on activation of a WCE mode or a non-WCE mode at the terminal device 120. Accordingly, at block 203, the network device 110 receives from the terminal device 120 the information on activation of the WCE mode or non-WCE mode at the terminal device 120.
  • RRC Radio Resource Control
  • the information on activation of the WCE mode or non-WCE mode at the terminal device 120 comprises at least one of: acknowledgment information (e.g. ACK or NACK) associated with a downlink transmission, Channel State Information (CSI) feedback between the terminal device 120 and the network device 110, and assistant information associated with activation of the WCE mode or non-WCE mode at the terminal device 120.
  • acknowledgment information e.g. ACK or NACK
  • CSI Channel State Information
  • the assistant information on activation of the WCE mode or non-WCE mode at the terminal device 120 comprises at least one of: a first indication indicating the terminal device 120 expects for the WCE mode, a second indication indicating the terminal device 120 expects for the non-WCE mode, a Reference Signal Received Power (RSRP), a Reference Signal Received Quality (RSRQ) as well as a request flag.
  • the request flag indicates the urgency of the terminal device 120 expecting for the WCE mode.
  • the assistant information comprises a first indication indicating the terminal device 120 expects for the WCE mode, a second indication indicating the terminal device 120 expects for the non-WCE mode, the RSRP and the RSRQ
  • the assistant information may have a structure as below:
  • suggestedMode represents the first indication indicating the terminal device 120 expects for the WCE mode and the second indication indicating the terminal device 120 expects for the non-WCE mode.
  • the assistant information at least comprises a first indication indicating the terminal device 120 expects for the WCE mode, a second indication indicating the terminal device 120 expects for the non-WCE mode, as well as a request flag indicating the urgency of the terminal device 120 expects for the WCE mode
  • the assistant information may have a structure as below:
  • suggestedMode represents the first indication indicating the terminal device 120 expects for the WCE mode the second indication indicating the terminal device 120 expects for the non-WCE mode, and requestFlag represents the request flag indicating urgency of the terminal device 120 expecting for the WCE mode.
  • requestFlag When requestFlag is set to True, it indicates high urgency of the terminal device 120 expecting for the WCE mode; when requestFlag is set to False, it indicates low urgency of the terminal device 120 expecting for the WCE mode.
  • the terminal device 120 transmits the assistant information to the network device 110 via at least one of: high layer signaling (e.g. RRC signaling), a radio resource allocated for an uplink scheduling request, a random access request, a physical random access channel resource, and an uplink transmission in response to a random access response.
  • high layer signaling e.g. RRC signaling
  • RRC signaling e.g. RRC signaling
  • the network device 110 determines, based on the information received from the terminal device 120, whether to activate the WCE mode or non-WCE mode at the terminal device 120.
  • the network device 110 determines, based on the CSI feedback received from the terminal device 120, channel conditions between the network device 110 and the terminal device 120 are rather poor, the network device 110 may determine to activate the WCE mode at the terminal device 120.
  • the network device 110 determines, based on the CSI feedback, the channel conditions between the network device 110 and the terminal device 120 are good and the terminal device 120 is currently in the WCE mode, the network device 110 may determine to activate the non-WCE mode at the terminal device 120.
  • the network device 110 may determine not to change a current operating mode of the terminal device 120, i.e. neither activate the WCE mode at the terminal device 120 nor activate the non-WCE mode at the terminal device 120. It should be understood that the network device 110 may determine whether to activate the WCE mode or non-WCE mode at the terminal device 120 according to any appropriate criterion, and the scope of the present disclosure is not limited in this regard.
  • the method 200 proceeds to block 205 at which the network device 110 transmits an instruction for activating the WCE mode or non-WCE mode to the terminal device 120. Accordingly, the terminal device 120 receives at block 206 the instruction for activating the WCE mode or the non-WCE mode from the network device 110 and further enters the WCE mode or non-WCE mode for operation.
  • the terminal device 120 will monitor signals designed for the WCE mode (abbreviated as "WCE signals”) and ignore signals designed for the non-WCE mode (abbreviated as "non-WCE signals").
  • WCE signals signals designed for the WCE mode
  • non-WCE signals signals designed for the WCE mode
  • the signals designed for the WCE mode may include, but not limited to, coverage enhanced synchronization signals, coverage enhanced broadcast signals, coverage enhanced control signals and coverage enhanced data signals.
  • the terminal device 120 needs to obtain a coverage enhancement level (e.g. the number of repetitions) before receiving or decoding the WCE signals.
  • the coverage enhancement level may be a predefined value.
  • the terminal device 120 may obtain the coverage enhancement level from the network device 110 via RRC signaling or a dynamical indicator in downlink control information (DCI).
  • the terminal device 120 may obtain the coverage enhancement level by blind decoding the downlink signal. It should be understood that no coverage enhancement (e.g. no repetitions) may be an option of the coverage enhancement level.
  • the terminal device 120 may receive or decode the WCE signals based on the coverage enhancement level.
  • the terminal device 120 will monitor the non-WCE signals and ignore the WCE signals.
  • the network device 110 may pause the transmission of the WCE signals to increase the spectrum efficiency.
  • the terminal device 120 may operate in both WCE mode and non-WCE mode simultaneously, i.e., the terminal device 120 will monitor both the WCE and non-WCE signals simultaneously.
  • the CSI measurement based on WCE reference signals should be aligned with the CSI measurement based on non-WCE reference signals.
  • the method 200 proceeds to block 207 at which the network device 110 executes any appropriate operation.
  • the terminal device 120 will maintain its current operating mode (WCE mode or non-WCE mode). If the terminal device 120 still expects to change its current operating mode, then the terminal device 120 may re-transmit to the network device 110 the information on activation of the WCE mode or the non-WCE mode at the terminal device 120.
  • transmitting the instruction for activating the WCE mode or the non-WCE mode to the terminal device 120 comprises: transmitting first control information for activating the WCE mode to the terminal device 120, or transmitting second control information for activating the non-WCE mode to the terminal device 120.
  • the assistant information transmitted by the terminal device 120 to the network device 110 at least comprises the request flag (e.g. requestFlag) indicating urgency of the terminal device 120 expecting for the WCE mode and the request flag indicates high urgency of the terminal device 120 expecting for the WCE mode, it means the terminal device 120 in the non-WCE mode cannot receive reference signals of the non-WCE mode and urgently expects for the WCE mode for operation.
  • the network device 110 preferentially transmits first control information for activating the WCE mode to the terminal device 120 in the WCE mode, so as to ensure that the terminal device 120 can receive the first control information to enter the WCE mode for operation. Accordingly, the terminal device 120 receives the first control information in the WCE mode, i.e., monitors the first control information designed for the WCE mode.
  • the network device 110 transmits the first control information or the second control information to the terminal device 120 via at least one of: DCI, high layer signaling, and a channel resource for physical random access response.
  • non-RRC-idle state may include, but not limited to, RRC-connected maintenance state, RRC connection establishment state, and RRC connection reconfiguration state. The method according to the present disclosure will be described in conjunction with these examples of the non-RRC-idle state.
  • the network device 110 receives CSI feedback and acknowledgment information (e.g. ACK or NACK) associated with a downlink transmission from the terminal device 120.
  • the terminal device 120 receives the reference signals from the network device 110 and measures them. Examples of the reference signals may include, but not limited to, (MF-) primary synchronization signals ((MF-)PSS, (MF-) secondary synchronization signals ((MF-)SSS), physical broadcast channel (PBCH) signals, cell-specific reference signals (CRS), and demodulation reference signals (DRS).
  • MF- primary synchronization signals
  • MF-)SSS secondary synchronization signals
  • PBCH physical broadcast channel
  • CRS cell-specific reference signals
  • DRS demodulation reference signals
  • the terminal device 120 may transmit to the network device 110 assistant information associated with activation of the WCE mode or the non-WCE mode at the terminal device 120.
  • the assistant information may include, but not limited to, at least one of: a first indication indicating the terminal device 120 expects for the WCE mode, a second indication indicating the terminal device 120 expects for the non-WCE mode, RSRP, RSRQ, and a request flag indicating urgency of the terminal device 120 expecting for the WCE mode.
  • the terminal device 120 may monitor, in a current operating mode (WCE or non-WCE), an instruction for activating the WCE mode or the non-WCE mode. After receiving the instruction, the terminal device 120 enters the activated mode for operation.
  • the terminal device 120 may determine, according to reference signals received from the network device 110, whether the WCE mode or the non-WCE mode is expected to be activated. Specifically, the terminal device 120 may try to receive the reference signals designed for the WCE mode and the non-WCE mode respectively and then choose the better one. For example, if the terminal device 120 cannot correctly receive the reference signal designed for the non-WCE mode but only can receive the reference signal designed for the WCE mode, the terminal device 120 may determine to activate the WCE mode.
  • the terminal device 120 may implicitly or explicitly transmit to the network device 110 a first indication of expecting for the WCE mode or a second indication of expecting for the non-WCE mode.
  • the first indication of expecting for the WCE mode or the second indication of expecting for the non-WCE mode may be carried by a random access request on a short physical random access channel (sPRACH) or an enhanced physical random access channel (ePRACH).
  • sPRACH short physical random access channel
  • ePRACH enhanced physical random access channel
  • the first indication or the second indication may be carried by the preamble based on ZC sequence. For instance, if the terminal device 120 chooses the roots 1-10 of ZC sequences, it indicates the terminal device 120 expects for the non-WCE mode. If the terminal device 120 chooses the roots 11-20 of ZC sequences, it indicates the terminal device 120 expects for the non-WCE mode.
  • the first indication of expecting for the WCE mode or the second indication of expecting for the non-WCE mode may be carried by the resource allocation of a physical random access channel (e.g. sPRACH or ePRACH). For instance, if the terminal device 120 chooses subframes # 2-4, it indicates the terminal device 120 expects for the non-WCE mode. If the terminal device 120 chooses subframes # 7-9, it indicates the terminal device 120 expects for the WCE mode.
  • a physical random access channel e.g. sPRACH or ePRACH
  • the first indication of expecting for the WCE mode or the second indication of expecting for the non-WCE mode may be carried by an uplink transmission in response to a random access response.
  • the network device 110 transmits "Random Access Response Grant" of the same resource allocation in both WCE mode and non-WCE mode.
  • the terminal device 120 may implicitly or explicitly transmit the first indication of expecting for the WCE mode or the second indication of expecting for the non-WCE mode in message 3 (Msg3) on the physical uplink shared channel (PUSCH).
  • Msg3 message 3
  • the terminal device 120 may transmit the first indication or the second indication as information of message 3.
  • the terminal device 120 may scramble message 3 using the first indication or the second indication.
  • the network device 110 may determine, based on the first indication or the second indication, whether to activate the operating mode expected by the terminal device 120, i.e. activate the WCE mode or the non-WCE mode. If the network device 110 determines to activate the WCE mode or the non-WCE mode, the network device 110 may implicitly or explicitly transmit an instruction for activating the WCE mode or the non-WCE mode to the terminal device 120.
  • the network device 110 may explicitly transmit the instruction for activating the mode (WCE or non-WCE mode) expected by the terminal device 120 via DCI or RRC signaling in the mode expected by the terminal device 120, and the terminal device 120 monitors DCI or RRC signaling in the expected mode.
  • the network device 110 may transmit "Random Access Response Grant" to the terminal device 120 in the WCE mode or the non-WCE mode which is determined to be activated.
  • the terminal device 120 monitors DCI or RRC signaling in both WCE mode and non-WCE mode and obtains the actual operating mode according to the transmission of "Random Access Response Grant."
  • the terminal device 120 may transmit via RRC signaling the information on activation of the WCE mode or the non-WCE mode at the terminal device 120 to the network device 110 that is a handover source.
  • the information may comprise, for example, CSI feedback, and a first indication of expecting for the WCE mode or a second indication of expecting for the non-WCE mode.
  • the network device 110 that is the handover source may forward the information received from the terminal device 120 to a further network device that is a handover target via S1/X2 interface by using a structure as below:
  • WCEModeInterCell SEQUENCE ⁇
  • “TargetPhysCellld” represents the identification of a target cell. Accordingly, the further network device that is the handover target receives the information on activation of the WCE mode or the non-WCE mode from the network device 110 that is the handover source.
  • the further network device that is the handover target determines whether to activate the WCE mode or the non-WCE mode at the terminal device 120 based on the received information. If the further network device that is the handover target determines to activate the WCE mode or the non-WCE mode at the terminal device 120, then the further network device may transmit an instruction for activating the WCE mode or the non-WCE mode at the terminal device 120 to the network device 110 via S1/X2 interface. Further the network device 110 forwards the instruction to the terminal device 120. Alternatively, the further network device that is the handover target may directly transmit the instruction to the terminal device 120.
  • the terminal device 120 In response to receiving the instruction, when the terminal device 120 receives the downlink transmission from the further network device that is the handover target, the terminal device 120 may operate in the activated mode. [0073] Return to Fig. 2, if the terminal device 120 determines at block 201 that it is in RRC-idle state, then the method 200 proceeds to block 208 at which the terminal device 120 autonomously activates the WCE mode or the non-WCE mode.
  • the terminal device 120 may determine to activate the WCE mode or the non-WCE mode according to reference signals received from the network device 110.
  • the network device 110 may transmit paging information to the terminal device 120 in both WCE mode and non-WCE mode simultaneously. Examples of the paging information may include, but not limited to, broadcast information and a trigger command causing the terminal device 120 to handover from the RRC-idle state to the RRC-connected state.
  • the terminal device 120 may receive the paging information in any of WCE mode and non-WCE mode. If the terminal device 120 receives the paging information including the trigger command, then the terminal device 120 starts to resume the RRC connection with the network device 110.
  • the terminal device 120 may determine to activate the WCE mode or the non-WCE mode according to reference signals received from the network device 110. For example, the terminal device 120 may determine to activate the WCE mode. In such an example, the network device 110 may first transmit the paging information including the trigger command to the terminal device 120 in the non-WCE mode. At this point, the terminal device 120 cannot receive the paging information in the WCE mode and further will not transmit a random access request to the network device 110 for resuming the RRC connection with the network device 110. Since the network device 110 receives no random access requests from the terminal device 120, the network device 110 will re-transmit the paging information to the terminal device 120 in the WCE mode. In this case, the terminal device 120 will receive the paging information in the WCE mode and further transmit a random access request to the network device 110 for resuming the RRC connection with the network device 110.
  • the terminal device 120 may maintain the WCE mode or the non-WCE mode in the RRC-connected state after which the terminal device 120 enters the RRC-idle state.
  • the network device 110 transmits the paging information to the terminal device 120 in the operating mode at the time of RRC connection before the terminal device 120 enters the RRC-idle state. If the terminal device 120 receives the paging information including the trigger command, then the terminal device 120 transmits a random access request to the network device 110 in order to resume the RRC connection with the network device 110. If the terminal device 120 in the non-WCE mode cannot receive any reference signal for the non-WCE mode, then the terminal device 120 reestablishes a connection with the network device 110.
  • the terminal device 120 in the RRC-idle state, may operate in the WCE mode as default. In other words, if the terminal device 120 operates in the non-WCE mode in the RRC-connected state after which the terminal device 120 enters the RRC-idle state, then the terminal device 120 will activate WCE mode after entering the RRC-idle state. If the terminal device 120 operates in the WCE mode in the RRC-connected state after which the terminal device 120 enters the RRC-idle state, then the terminal device maintains the WCE mode after entering RRC-idle state.
  • the network device 110 transmits the paging information to the terminal device 120 in the WCE mode, and the terminal device 120 monitors the paging information in the WCE mode. If the network device 110 pauses the transmission of WCE signals, then the terminal device 120 cannot receive reference signals designed for the WCE mode. In this case, if the terminal device 120 can receive reference signals designed for the non-WCE mode, then the terminal device 120 activates the non-WCE mode and further operates in the non-WCE mode. If the terminal device 120 cannot receive reference signals designed for the non-WCE mode, then the terminal device 120 reestablishes a connection with the network device 110.
  • Fig. 3 shows a block diagram of an apparatus 300 according to some embodiments of the present disclosure. It may be understood that the apparatus 300 may be implemented at the network device 110 side as shown in Fig. 1.
  • the apparatus 300 e.g. the network device 110
  • the apparatus 300 comprises a first information receiving unit 310 and a first activating unit 320.
  • the first information receiving unit 310 is configured to receive from a terminal device information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at the terminal device.
  • the first activating unit 320 is configured to, in response to determining to activate the WCE mode or the non-WCE mode at the terminal device based on the received information, transmit an instruction for activating the WCE mode or the non-WCE mode to the terminal device.
  • WCE wideband coverage enhancement
  • receiving the information on activation of the WCE mode or the non-WCE mode comprises receiving from the terminal device at least one of: acknowledgment information associated with a downlink transmission, channel state information (CSI) between the terminal device and the network device, and assistant information on activation of the WCE mode or the non-WCE mode at the terminal device.
  • CSI channel state information
  • receiving the assistant information comprises receiving at least one of: a first indication indicating that the terminal device expects for the WCE mode, a second indication indicating that the terminal device expects for the non-WCE mode, a reference signal received power (RSRP), a reference signal received quality (RSRQ), and a request flag indicating urgency of the terminal device expecting for the WCE mode.
  • a first indication indicating that the terminal device expects for the WCE mode
  • a second indication indicating that the terminal device expects for the non-WCE mode
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • request flag indicating urgency of the terminal device expecting for the WCE mode.
  • receiving the assistant information comprises receiving the assistant information via at least one of: high layer signaling, a radio resource allocated for an uplink scheduling request, a random access request, a physical random access channel resource, and an uplink transmission in response to a random access response.
  • transmitting an instruction for activating the WCE mode or the non-WCE mode to the terminal device comprises: transmitting first control information for activating the WCE mode to the terminal device; or transmitting second control information for activating the non-WCE mode to the terminal device.
  • transmitting the first control information to the terminal device comprises: in response to receiving the request flag, transmitting in the WCE mode the first control information to the terminal device. [0085] In some embodiments, transmitting the first control information or the second control information to the terminal device comprises: transmitting the first control information or the second control information via at least one of: downlink control information (DCI), high layer signaling, and a channel resource for a physical random access response.
  • DCI downlink control information
  • high layer signaling high layer signaling
  • a channel resource for a physical random access response a physical random access response
  • the apparatus 300 further comprises a forwarding unit.
  • the forwarding unit is configured to forward the received information to a further network device that is a handover target of the terminal device.
  • transmitting an instruction for activating the WCE mode or the non-WCE mode to the terminal device comprises: in response to receiving the instruction from the further network device, transmitting the instruction to the terminal device.
  • Fig. 4 shows a block diagram of an apparatus 400 according to some embodiments of the present disclosure. It may be understood that the apparatus 400 may be implemented at the terminal device 120 side shown in Fig. 1. As depicted in Fig. 4, the apparatus 400 (e.g. the terminal device 120) comprises an information transmitting unit 410, an instruction receiving unit 420 and an autonomous activating unit 430.
  • the information transmitting unit 410 is configured to, in response to being in a non-radio resource control (RRC)-idle state, transmit to a network device information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at a terminal device.
  • the instruction receiving unit 420 is configured to, in response to receiving an instruction for activating the WCE mode or the non-WCE mode, enter the WCE mode or the non-WCE mode for operation.
  • the autonomous activating unit 430 is configured to, in response to being in an RRC-idle state, autonomously activate the WCE mode or the non-WCE mode.
  • transmitting the information on activation of the WCE mode or the non-WCE mode comprises transmitting at least one of: acknowledgment information associated with a downlink transmission, channel state information (CSI) between the terminal device and the network device, and assistant information on activation of the WCE mode or the non-WCE mode at the terminal device.
  • CSI channel state information
  • transmitting the assistant information comprises transmitting at least one of: a first indication indicating that the terminal device expects for the WCE mode, a second indication indicating that the terminal device expects for the non-WCE mode, a reference signal received power (RSRP), a reference signal received quality (RSRQ), and a request flag indicating urgency of the terminal device expecting for the WCE mode.
  • a first indication indicating that the terminal device expects for the WCE mode
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • request flag indicating urgency of the terminal device expecting for the WCE mode.
  • transmitting the assistant information comprises transmitting the assistant information via at least one of: high layer signaling, a radio resource allocated for an uplink scheduling request, a random access request, a physical random access channel resource, and an uplink transmission in response to a random access response.
  • entering the WCE mode or the non-WCE mode for operation comprises: in response to receiving first control information for activating the WCE mode from the network device, entering the WCE mode for operation; and in response to receiving second control information for activating the non-WCE mode from the network device, entering the non-WCE mode for operation.
  • entering the WCE mode or the non-WCE mode for operation comprises: in response to transmitting the request flag to the network device, receiving in the WCE mode the first control information from the network device.
  • receiving the first control information or the second control information comprises receiving the first control information or the second control information via at least one of: downlink control information (DCI), high layer signaling, and a channel resource of a physical random access response.
  • entering the WCE mode or the non-WCE mode for operation comprises: in response to receiving the instruction for activating the WCE mode or the non-WCE mode from a further network device that is a handover target, entering the WCE mode or the non-WCE mode for operation.
  • DCI downlink control information
  • entering the WCE mode or the non-WCE mode for operation comprises: in response to receiving the instruction for activating the WCE mode or the non-WCE mode from a further network device that is a handover target, entering the WCE mode or the non-WCE mode for operation.
  • autonomously activating the WCE mode or the non-WCE mode at the terminal device comprises one of: autonomously activating the WCE mode or the non-WCE mode according to a reference signal received from the network device; maintaining the WCE mode or the non-WCE mode in an RRC-connected state after which the terminal device enters the RRC-idle state; and activating the WCE mode as default.
  • Fig. 5 shows a block diagram of an apparatus 500 according to some embodiments of the present disclosure. It may be understood that the apparatus 500 may be implemented at the network device (not shown in Fig. 1) side that is a handover target of the terminal device 120 in Fig. 1. As depicted in Fig. 5, the apparatus 500 comprises a second information receiving unit 510 and a second activating unit 520. The second information receiving unit 510 is configured to receive information on activation of a wideband coverage enhancement (WCE) mode or a non-WCE mode at a terminal device from a further network device that is a handover source of the terminal device.
  • WCE wideband coverage enhancement
  • the second activating unit 520 is configured to, in response to determining to activate the WCE mode or the non-WCE mode at the terminal device based on the received information, transmit an instruction for activating the WCE mode or the non-WCE mode. [0098] In some embodiments, transmitting the instruction for activating the WCE mode or the non-WCE mode comprises: transmitting the instruction for activating the WCE mode or the non-WCE mode to the terminal device.
  • transmitting the instruction for activating the WCE mode or the non-WCE mode comprises: transmitting the instruction for activating the WCE mode the non-WCE mode to the terminal device via the further network device.
  • each unit of the apparatuses 300, 400 and 500 corresponds to each step of the method 200 described with reference to Fig. 2. Therefore, operations and features described above with reference to Fig. 2 are also applicable to the apparatuses 300, 400, 500 as well as units included in them, and meanwhile have the same effect, details of which are ignored here.
  • the units included in the apparatuses 300, 400 and 500 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 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
  • Figs. 3 to 5 may be implemented, partially or entirely, as hardware modules, software modules, firmware modules or any combination thereof.
  • the flows, methods or processes described above may be implemented by hardware in a base station or terminal device.
  • the base station or terminal device may implement the method 200 by means of its transmitter, receiver, transceiver and/or processor.
  • Fig. 6 shows a block diagram of a device 600 which is applicable to implement the embodiments of the present disclosure.
  • the device 600 may be used for implementing a network device or a terminal device.
  • the device 600 comprises a controller 610.
  • the controller 610 controls operations and functions of the device 600.
  • the controller 610 may execute various operations by means of instructions 630 stored in a memory 620 coupled to the controller 610.
  • the memory 620 may be of any appropriate type that is applicable to a local technical environment, and may be implemented using any appropriate data storage techniques, including without limitation to, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems. Though only one memory unit is shown in Fig. 6, there may be a plurality of physically different memory units in the device 600.
  • the controller 610 may be of any appropriate type that is applicable to a local technical environment, and may include without limitation to, a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), as well as one or more processors in a processor based multi-core processor architecture.
  • the device 600 may also comprise multiple controllers 610.
  • the controller 610 is coupled to a transceiver 640 that may effect information receiving and transmitting by means of one or more antennas 650 and/or other component.
  • the transceiver 640 may be a device capable of effecting both data sending and receiving or may be a device capable of effecting data sending or transmitting only.
  • the controller 610 and the transceiver 640 may operate in cooperation to implement operations at the network device 110 in the method 200 described with reference to Fig. 2.
  • the controller 610 and the transceiver 640 may operate in cooperation to implement operations at the terminal device 120 in the method 200 described with reference to Fig. 2.
  • all actions relating to data/information receiving/transmitting as described above may be performed by the transceiver 640, and other actions may be performed by the controller 610. All features described with reference to Figs. 1 to 5 are applicable to the device 600, details of which are ignored here.
  • 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, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • embodiments of the present disclosure can be described in the general context of machine-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor.
  • 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.
  • a machine readable medium 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 is 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.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Des modes de réalisation de l'invention concernent un procédé et un dispositif d'activation et de désactivation du mode d'amélioration de couverture à large bande (WCE). Le procédé de l'invention consiste à recevoir, d'un dispositif terminal, des informations sur l'activation d'un mode d'amélioration de couverture à large bande (WCE) ou d'un mode non WCE sur le dispositif terminal. Le procédé consiste également à transmettre au dispositif terminal, en réponse à la détermination d'activation du mode WCE ou du mode non-WCE sur le dispositif terminal d'après les informations reçues, une instruction permettant d'activer le mode WCE ou le mode non-WCE.
PCT/IB2018/000473 2017-04-17 2018-04-13 Procédé, dispositif et support lisible par ordinateur pour l'activation et la désactivation du mode wce Ceased WO2018193303A2 (fr)

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CN201710250203.XA CN108737016B (zh) 2017-04-17 2017-04-17 用于wce模式的激活和去激活的方法、设备和计算机可读介质

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