WO2022233300A1 - 由用户设备执行的方法以及用户设备 - Google Patents

由用户设备执行的方法以及用户设备 Download PDF

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Publication number
WO2022233300A1
WO2022233300A1 PCT/CN2022/090929 CN2022090929W WO2022233300A1 WO 2022233300 A1 WO2022233300 A1 WO 2022233300A1 CN 2022090929 W CN2022090929 W CN 2022090929W WO 2022233300 A1 WO2022233300 A1 WO 2022233300A1
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remote
rsrp measurement
relay
measurement configuration
configuration parameter
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PCT/CN2022/090929
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English (en)
French (fr)
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刘蕾
刘仁茂
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夏普株式会社
刘蕾
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Publication of WO2022233300A1 publication Critical patent/WO2022233300A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point

Definitions

  • the present invention relates to the technical field of wireless communication, and more particularly, the present invention relates to a method for performing sideline communication relay selection or reselection by a user equipment and a corresponding user equipment.
  • the remote UE may need to select a relay UE to provide relay service for it.
  • a remote UE selects a relay UE to serve itself, it may perform relay reselection due to various situations.
  • This disclosure discusses the handling of remote UEs and relay UEs in selection and reselection scenarios.
  • the present invention provides a method executed by a user equipment and the user equipment, which can effectively trigger the selection or reselection of a relay by a remote UE.
  • a method performed by a user equipment UE comprising: when a PC5-RRC connection, that is, a PC5 interface radio resource control connection, is established between the UE serving as a remote UE and a relay UE, the UE receiving the sidelink communication reference signal received power SL-RSRP measurement configuration parameter configured by the relay UE; and after the UE receives the SL-RSRP measurement configuration parameter configured by the relay UE, according to the received
  • the SL-RSRP measurement configuration parameters perform SL-RSRP measurement and filter the SL-RSRP measurement, and perform relay selection or reselection according to the filtering result.
  • the relay UE determines that the PC5-RRC connection established with the remote UE is a connection for relay service.
  • the remote UE measures the sidelink communication discovery reference signal received power SD-RSRP and measures the SD-RSRP
  • the RSRP is filtered, and the selection or reselection of the relay is performed according to the filtered result.
  • a method performed by a user equipment UE comprising: when a PC5-RRC connection, that is, a PC5 interface radio resource control connection, is established between the UE serving as a relay UE and a remote UE, the The UE always configures the sidelink communication reference signal received power SL-RSRP measurement configuration parameter for the remote UE.
  • a PC5-RRC connection that is, a PC5 interface radio resource control connection
  • the relay UE configures the SL-RSRP measurement configuration parameter for the remote UE in the first PC5-RRC message after the PC5-RRC connection is established with the remote UE.
  • a method performed by a user equipment UE including: the UE serving as a remote UE receives a sidelink communication reference signal received power SL-RSRP measurement configuration parameter configured by a base station; SL-RSRP measurement is performed on the received SL-RSRP measurement configuration parameters.
  • the remote UE receives the SL-RSRP measurement configuration parameter configured by the base station through a system message or through RRC dedicated signaling.
  • the SL-RSRP measurement configuration parameter configured by the base station received by the remote UE includes: at least one of the SL-RSRP measurement object, measurement frequency and measurement period that the remote UE needs to measure.
  • the UE performing the SL-RSRP measurement according to the received SL-RSRP measurement configuration parameter includes at least one of the following situations:
  • the remote UE uses the SL-RSRP measurement configuration parameter configured by the base station, and further, if the If the remote UE is out of coverage, the remote UE adopts the pre-configured SL-RSRP measurement configuration parameter;
  • the remote UE uses the SL-RSRP measurement configuration parameter configured by the base station. Further, if the remote UE is out of coverage, the remote UE uses the pre-configured SL-RSRP measurement configuration parameter. After receiving the SL-RSRP measurement configuration parameter configured by the relay UE, the remote UE uses the SL-RSRP measurement configuration parameter configured by the relay UE to perform the SL-RSRP measurement instead; as well as
  • the remote UE uses the SL-RSRP measurement configuration parameter configured by the base station. Further, if the remote UE is out of coverage, the remote UE uses the pre-configured SL-RSRP measurement configuration parameter. After the remote UE receives the SL-RSRP measurement configuration parameters configured by the relay UE, it adds, deletes, or modifies the stored measurements according to the received SL-RSRP measurement configuration parameters, and according to the Perform the SL-RSRP measurement with the SL-RSRP measurement configuration parameters obtained as an operation result.
  • the SL-RSRP measurement configuration When the SL-RSRP measurement configuration parameters configured by the base station are received again, the SL-RSRP measurement configuration The parameter performs an operation of adding, deleting or modifying the stored measurement, and performs the SL-RSRP measurement according to the SL-RSRP measurement configuration parameter obtained as a result of the operation.
  • a user equipment comprising: a processor; and a memory storing instructions; wherein the instructions execute the above method when executed by the processor.
  • the selection or reselection of the relay by the remote UE can be effectively triggered.
  • FIG. 1 is a diagram schematically showing a scenario of UE-to-Network relay.
  • FIG. 2 is a diagram schematically illustrating UE-to-UE relay.
  • FIG. 3 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present invention.
  • FIG. 4 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present invention.
  • FIG. 5 is a block diagram showing a user equipment UE according to the present invention.
  • UE User Equipment user equipment
  • RRC Radio Resource Control Radio Resource Control
  • RRC_IDLE RRC idle state
  • Radio Access Network Radio Access Layer
  • SDAP Service Data Adaptation Protocol, Service Data Adaptation Protocol
  • SCI Sidelink Control Information, side communication control information
  • RSRP Reference Signal Receiving Power, reference signal receiving power
  • PSCCH Physical Sidelink Control Channel, Physical Sidelink Communication Control Channel
  • PSSCH Physical Sidelink Shared Channel, Physical Sidelink Shared Channel
  • MIB Master Information Block, the main information block
  • SIB System Information Block, system information block
  • DMRS Dedicated demodulation reference signal, dedicated demodulation reference signal
  • SD-RSRP Sidelink Discovery Reference Signal Received Power, Sidelink Discovery Reference Signal Received Power
  • SL-RSRP Sidelink RSRP, Sidelink Communication Reference Signal Received Power
  • NG-RAN NG Radio Access Network, a new generation of radio access network
  • 5GC 5G Core Network, 5G Core Network
  • PDU Protocol Data Unit, protocol data unit
  • SDU Service Data Unit, service data unit
  • Remote UE Remote UE
  • Relay UE Relay UE
  • network, base station and RAN can be used interchangeably, and the network can be a long-term evolution LET network, a new radio access technology (New RAT, NR) network, an enhanced long-term evolution eLTE network, or a 3GPP subsequent evolution version other networks as defined in .
  • New RAT new radio access technology
  • eLTE enhanced long-term evolution eLTE network
  • 3GPP subsequent evolution version other networks as defined in .
  • the user equipment UE may refer to the NR device supporting the NR Sidelink relay function described in the background art, or may refer to other types of NR devices or LTE devices.
  • the PC5 interface is an interface for sidelink communication between the UE and the control plane and the user plane.
  • the PC5-RRC connection is an AS layer logical connection between a pair of source layer two IDs and target layer two IDs.
  • the remote UE-to-Network relay is shown in Figure 1.
  • the remote UE is on the left, the relay UE is in the middle, and the network is on the right; in scenario 3, the network is on both sides, and the middle is from left to right
  • the remote UE and the relay UE respectively.
  • the remote UE and the relay UE are connected through the PC5 interface, and the relay UE and the network are connected through the Uu interface. Because the remote UE is far away from the network or the communication environment is poor, the relay UE needs to relay and forward the signaling and data between the two.
  • the scenarios of UE-to-Network relay include:
  • Both the remote UE and the relay UE are within the coverage and in the same cell;
  • Both the remote UE and the relay UE are in coverage, but in different cells.
  • the UE-to-UE relay is shown in Figure 2, the left and right sides are remote UEs, and the middle is the relay UE.
  • the remote UE and the relay UE are respectively connected through the PC5 interface. Since the two remote UEs are far apart or the communication environment is poor, the relay UE needs to relay and forward the signaling and data between the two remote UEs.
  • UE-to-UE relay scenarios include:
  • both remote UEs ie, source-side UE and target-side UE
  • relay UE are within coverage
  • Partial coverage Among the two remote UEs and the relay UE, at least one UE is in coverage, and at least one UE is out of coverage.
  • the coverage area refers to the coverage area of the base station.
  • a remote UE After a remote UE selects a relay UE to provide relay services for itself, it will establish a PC5-RRC connection with the relay UE to communicate with the base station or another remote UE through the relay UE.
  • SL-RSRP Sidelink Reference Signal Receiving Power
  • SL-RSRP Reference Signal Received Power
  • the measurement parameters of the SL-RSRP such as the measurement frequency, the measurement period, the measurement filter parameters and other information are configured by the relay UE for the remote UE.
  • the remote UE receives the measurement parameters configured by the relay UE, it needs to perform corresponding measurement configuration and report the measurement report to the relay UE.
  • the relay UE may choose to configure measurement parameters or not configure measurement parameters according to its own needs.
  • the remote UE When the relay UE does not perform the SL-RSRP measurement configuration, the remote UE cannot effectively perform the SL-RSRP measurement, and triggers the selection or reselection of the relay UE according to the SL-RSRP measurement result.
  • the remote UE can be guaranteed to obtain the SL-RSRP measurement configuration to the greatest extent, and the SL-RSRP measurement can be performed according to the measurement configuration, so that when the PC5 link between the remote UE and the relay UE is in poor condition, The selection or reselection of the relay UE is triggered in time.
  • FIG. 3 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present invention.
  • this embodiment includes steps 301 and 303 .
  • step 301 when a PC5-RRC connection (or a unicast link) is established between the remote UE and the relay UE, the remote UE receives the SL-RSRP measurement configuration parameters configured by the relay UE.
  • the relay UE when a PC5-RRC connection (or a unicast link) is established between the remote UE and the relay UE, the relay UE always configures SL-RSRP measurement configuration parameters for the remote UE.
  • the relay UE may be a UE that has been determined to provide a relay service for a remote UE, may also refer to a UE with relay capability, or may refer to a UE that performs a relay service according to an upper layer instruction.
  • the relay UE needs to determine that the unicast link established with the remote UE is for the relay service.
  • another expression is: the information element sl-MeasConfig in RRCReconfigurationSidelink is always carried or always configured when the UE is a relay UE.
  • the relay UE configures the SL-RSRP measurement configuration parameter for the remote UE, which is configured in the first PC-RRC message (eg, a reconfiguration message) after the PC5-RRC connection between the relay UE and the remote UE is established.
  • the connection establishment may be indicated by the upper layer.
  • step 303 after receiving the SL-RSRP measurement configuration parameters configured by the relay UE, the remote UE performs SL-RSRP measurement according to the configuration, performs Layer 3 filtering on the SL-RSRP measurement, and selects the relay according to the filtering result. or reselect.
  • the selection of the relay may refer to before the remote UE has selected a relay UE, and the reselection of the relay may refer to after the remote UE has selected a relay UE.
  • the relay UE and the remote UE establish a PC5-RRC connection, it is not to provide a relay service for the remote UE, that is, the PC5-RRC connection established between the two UEs is only for ordinary sideline communication,
  • the relay UE also always configures SL-RSRP measurement configuration parameters for the remote UE, which are used for the remote UE to select or reselection the relay.
  • FIG. 4 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present invention.
  • this embodiment includes steps 401 and 403 .
  • step 401 the remote UE receives the SL-RSRP measurement configuration parameters configured by the base station.
  • the remote UE may receive the base station configuration through system messages, or through RRC dedicated signaling, or through relay UE forwarding (relay UE may forward through unicast, multicast or broadcast).
  • the SL-RSRP measurement configuration parameter may be used for the remote UE to perform unicast link SL-RSRP measurement, or the SL-RSRP measurement for the remote UE to perform relay selection or reselection, or It is used to configure the unicast link SL-RSRP measurement for the remote UE's opposite UE, or it is added in the measurement configuration for the air interface to indicate a certain measurement parameter that can be the same as the remote UE's relay reselection or Selected SL-RSRP measurements (eg, but not limited to: frequency bins, filter parameters, measurement period, reference signal, etc.).
  • the remote UE can directly use it for its own relay selection or reselection SL-RSRP measurement .
  • the selection of the relay may refer to before the remote UE has selected a relay UE, and the reselection of the relay may refer to after the remote UE has selected a relay UE.
  • the SL-RSRP measurement configuration parameters configured by the base station received by the remote UE include, but are not limited to: the SL-RSRP measurement object, measurement frequency, and measurement period that the remote UE needs to measure.
  • step 403 the remote UE performs SL-RSRP measurement according to the SL-RSRP measurement configuration.
  • the SL-RSRP measurement configuration adopted by the remote UE includes but is not limited to the following possibilities:
  • the remote UE uses the SL-RSRP measurement configuration parameters configured by the base station. Further, if the remote UE is out of coverage, the remote UE uses the pre-configured SL-RSRP to measure the configuration parameters.
  • the remote UE measures the configuration parameters using the SL-RSRP configured by the base station. Further, if the remote UE is out of coverage, the remote UE uses the pre-configured SL-RSRP to measure the configuration parameters. After receiving the SL-RSRP measurement configuration parameters configured by the relay UE, the remote UE uses the SL-RSRP measurement configuration parameters configured by the relay UE instead to perform SL-RSRP measurement.
  • the remote UE measures the configuration parameters using the SL-RSRP configured by the base station. Further, if the remote UE is out of coverage, the remote UE uses the pre-configured SL-RSRP to measure the configuration parameters.
  • the remote UE receives the SL-RSRP measurement configuration parameters configured by the relay UE, it adds, deletes or modifies the stored measurements according to the specific measurement parameters, and performs SL-RSRP measurement according to the SL-RSRP measurement configuration parameters obtained from the operation results.
  • -RSRP measurement When the SL-RSRP measurement configuration parameters configured by the base station are received again, the stored measurements are added, deleted or modified according to the specific measurement parameters, and SL-RSRP measurement is performed according to the SL-RSRP measurement configuration parameters obtained from the operation results.
  • whether the remote UE has received the SL-RSRP measurement configuration parameters configured by the relay UE can be determined by judging whether the information element sl-MeasConfig in the RRCReconfigurationSidelink sent by the relay UE to the remote UE is carried or valid.
  • the remote UE receives the SL-RSRP measurement configuration parameters configured by the relay UE, the remote UE measures SL-RSRP, performs Layer 3 filtering on the SL-RSRP, and selects or reselection the relay according to the filtered result.
  • the remote UE does not receive the SL-RSRP measurement configuration parameters configured by the relay UE, the remote UE measures SD-RSRP, performs Layer 3 filtering on SD-RSRP, and selects or reselection the relay according to the filtered result.
  • whether the remote UE has received the SL-RSRP measurement configuration parameters configured by the relay UE can be determined by judging whether the information element sl-MeasConfig in the RRCReconfigurationSidelink sent by the relay UE to the remote UE is carried or valid.
  • the selection of the relay may refer to before the remote UE has selected a relay UE, and the reselection of the relay may refer to after the remote UE has selected a relay UE.
  • FIG. 5 is a schematic structural block diagram of the user equipment UE involved in the present invention.
  • the user equipment UE50 includes a processor 501 and a memory 502 .
  • the processor 501 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 502 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory, or the like.
  • the memory 502 has program instructions stored thereon. When the instruction is executed by the processor 501, the above method described in detail in the present invention and executed by the user equipment can be executed.
  • a program running on a device may be a program that causes a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory systems.
  • a program for realizing the functions of the embodiments of the present invention can be recorded on a computer-readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called "computer system” here may be a computer system embedded in the device, and may include an operating system or hardware (eg, peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium that dynamically stores a program for a short period of time, or any other recording medium readable by a computer.
  • circuits eg, monolithic or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general-purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit. Where new integrated circuit technologies have emerged as a result of advances in semiconductor technology to replace existing integrated circuits, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.
  • the present invention is not limited to the above-described embodiments. Although various examples of the described embodiments have been described, the invention is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

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Abstract

一种由用户设备UE执行的方法，包括：当作为远程UE的UE和中继UE之间建立了PC5-RRC连接即PC5接口无线资源控制连接时，UE接收中继UE配置的侧行通信参考信号接收功率SL-RSRP测量配置参数；以及UE在接收到中继UE配置的SL-RSRP测量配置参数后，根据接收到的SL-RSRP测量配置参数进行SL-RSRP测量并对SL-RSRP测量进行滤波，并且根据滤波的结果进行中继的选择或者重选。

Description

由用户设备执行的方法以及用户设备 技术领域
本发明涉及无线通信技术领域，更具体地，本发明涉及由用户设备执行侧行通信中继选择或重选的方法以及相应的用户设备。
背景技术
2018年6月，在第三代合作伙伴计划(3rd Generation Partnership Project：3GPP)RAN#80全会上，版本16基于5G NR网络技术的V2X可行性研究课题(参见非专利文献：RP-181480，New SID Proposal：Study on NR V2X)获得批准。版本16的NR V2X包含的主要功能为支持无网络覆盖和有网络覆盖场景下的单播、组播和广播。
2019年12月，RAN#86次全会上，针对版本17的NR sidelink relaying(侧行通信中继)的研究项目被提出(参见非专利文献：RP-193253 New Study Item on NR Sidelink Relaying)，并获批准。该研究项目的最新版本参见非专利文献：RP-201474 reivsed SID NR sidelink relay。该研究项目主要研究UE(用户设备)到网络和UE到UE的中继解决方案，用于扩展基于侧行通信的覆盖。该研究项目的目标之一是支持侧行通信中继的选择和重选。
2020年3月，RAN#91次全会上，针对版本17的NR sidelink relaying(侧行通信中继)的工作项目被提出(参见非专利文献：RP-210904 New Study Item on NR Sidelink Relaying)，并获批准。该工作项目的目标之一是标准化侧行通信中继的选择和重选。
远程UE为了和基站或者另一个远程UE进行侧行通信，可能需要选择一个中继UE为它提供中继服务。当远程UE选择了一个中继UE为自己服务，它可能会因为各种情况进行中继的重选。
本发明讨论远程UE和中继UE在选择和重选场景中的处理。
发明内容
为了解决上述问题中的至少一部分，本发明提供了一种由用户设备执行的方法以及用户设备，能够有效触发远程UE对中继的选择或者重选。
根据本发明，提出了一种由用户设备UE执行的方法，包括：当作为远程UE的所述UE和中继UE之间建立了PC5-RRC连接即PC5接口无线资源控制连接时，所述UE接收所述中继UE配置的侧行通信参考信号接收功率SL-RSRP测量配置参数；以及所述UE在接收到所述中继UE配置的所述SL-RSRP测量配置参数后，根据接收到的所述SL-RSRP测量配置参数进行SL-RSRP测量并对所述SL-RSRP测量进行滤波，并且根据滤波的结果进行中继的选择或者重选。
优选地，所述中继UE判断与所述远程UE之间建立的所述PC5-RRC连接是用于中继服务的连接。
优选地，如果所述远程UE没有接收到所述中继UE配置的所述SL-RSRP测量配置参数，则所述远程UE测量侧行通信发现参考信号接收功率SD-RSRP并对所述SD-RSRP进行滤波，并且根据滤波后的结果进行中继的选择或重选。
另外，根据本发明，提出了一种由用户设备UE执行的方法，包括：当作为中继UE的所述UE和远程UE之间建立了PC5-RRC连接即PC5接口无线资源控制连接时，所述UE总是给所述远程UE配置侧行通信参考信号接收功率SL-RSRP测量配置参数。
优选地，所述中继UE在与所述远程UE之间建立了所述PC5-RRC连接后的第一条PC5-RRC消息中为所述远程UE配置所述SL-RSRP测量配置参数。
此外，根据本发明，提出了一种由用户设备UE执行的方法，包括：作为远程UE的所述UE接收基站配置的侧行通信参考信号接收功率SL-RSRP测量配置参数；以及所述UE根据接收到的所述SL-RSRP测量配置参数进行SL-RSRP测量。
优选地，所述远程UE通过系统消息或者通过无线资源控制RRC专有信令来接收所述基站配置的所述SL-RSRP测量配置参数。
优选地，所述远程UE接收到的所述基站配置的所述SL-RSRP测量配置参数包括：所述远程UE需要测量的SL-RSRP的测量对象、测量频点和测量周期中的至少一个。
优选地，所述UE根据接收到的所述SL-RSRP测量配置参数进行所述SL-RSRP测量包括以下情形中的至少一个：
当所述远程UE没有接收到所述中继UE为其配置的所述SL-RSRP测量配置参数时，所述远程UE使用所述基站配置的所述SL-RSRP测量配置参数，进一步，如果所述远程UE在覆盖范围外，则所述远程UE采用预配置的所述SL-RSRP测量配置参数；
所述远程UE使用所述基站配置的所述SL-RSRP测量配置参数，进一步，如果所述远程UE在覆盖范围外，则所述远程UE采用预配置的所述SL-RSRP测量配置参数，当所述远程UE接收到所述中继UE配置的所述SL-RSRP测量配置参数后，则改为采用所述中继UE配置的所述SL-RSRP测量配置参数进行所述SL-RSRP测量；以及
所述远程UE使用所述基站配置的所述SL-RSRP测量配置参数，进一步，如果所述远程UE在覆盖范围外，则所述远程UE采用预配置的所述SL-RSRP测量配置参数，当所述远程UE接收到所述中继UE配置的所述SL-RSRP测量配置参数后，根据接收到的所述SL-RSRP测量配置参数对保存的测量进行增加、删除或者修改的操作，并根据作为操作结果得到的所述SL-RSRP测量配置参数进行所述SL-RSRP测量，当再次收到所述基站配置的所述SL-RSRP测量配置参数，根据接收到的所述SL-RSRP测量配置参数对保存的测量进行增加、删除或者修改的操作，并根据作为操作结果得到的所述SL-RSRP测量配置参数进行所述SL-RSRP测量。
另外，根据本发明，提出了一种用户设备，包括：处理器；以及存储器，存储有指令；其中，所述指令在由所述处理器运行时执行上述的方法。
根据本发明，能够有效触发远程UE对中继的选择或者重选。
附图说明
图1是示意地示出UE-to-Network中继的场景的图。
图2是示意地示出UE-to-UE中继的图。
图3是示出了根据本发明的实施例1的由用户设备执行的方法的流程图。
图4是示出了根据本发明的实施例2的由用户设备执行的方法的流程图。
图5是表示本发明所涉及的用户设备UE的框图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
下面描述本发明涉及的部分术语，术语的具体含义见3GPP最新标准规范，例如TS38.300、TS38.331、TS36.300、TS36.331等。除非另有指出，本发明中涉及的术语都具有下文的含义。
UE：User Equipment用户设备
NR：New Radio新一代无线技术
RRC：Radio Resource Control无线资源控制
RRC_CONNECTED：RRC连接态
RRC_INACTIVE：RRC非激活态
RRC_IDLE：RRC空闲态
RAN：Radio Access Network，无线接入层
Sidelink：侧行通信
SDAP：Service Data Adaptation Protocol，服务数据适配协议
SCI：Sidelink Control Information，侧行通信控制信息
RSRP：Reference Signal Receiving Power，参考信号接收功率
PSCCH：Physical Sidelink Control Channel，物理侧行通信控制信道
PSSCH：Physical Sidelink Shared Channel，物理侧行通信共享信道
AS：Access Stratum，接入层
DL：Downlink，下行
IE：Information Element，信息元素
CE：Control Element，控制元素
MIB：Master Information Block，主信息块
NR：New Radio，新无线电
SIB：System Information Block，系统信息块
DMRS：Dedicated demodulation reference signal，专有解调参考信号
SD-RSRP：Sidelink Discovery Reference Signal Received Power，侧行通信发现参考信号接收功率
SL-RSRP：Sidelink RSRP，侧行通信参考信号接收功率
NG-RAN：NG Radio Access Network，新一代无线接入网络
5GC：5G Core Network，5G核心网
PDU：Protocol Data Unit，协议数据单元
SDU：Service Data Unit，服务数据单元
Remote UE：远程UE
Relay UE：中继UE
本发明中，网络、基站和RAN可互换使用，所述网络可以是长期演进LET网络、新无线访问技术(New RAT，NR)网络、增强的长期演进eLTE网络，也可以是3GPP后续演进版本中定义的其他网络。
本发明中，用户设备UE可以指背景技术中所述的支持NR Sidelink中继功能的NR设备，也可以指其他类型的NR设备或者LTE设备。
以下，对本发明的相关技术给出说明。
PC5接口是UE和UE之间进行控制面和用户面Sidelink通信的接口。对于Sidelink单播，PC5-RRC连接是一对源层二ID和目标层二ID之间的AS层逻辑连接。一个PC5单播链路建立就会对应有一个PC5-RRC连接建立。
UE-to-Network中继如图1所示，场景1和场景2中，左侧为远程UE，中间为中继UE，右侧为网络；场景3中，两侧为网络，中间从左到右分别为远程UE和中继UE。远程UE和中继UE之间通过PC5接口连接，中继UE和网络通过Uu口连接。由于远程UE距离网络较远或者通信环境不佳，需要中继UE对两者间的信令和数据进行中继转发。
UE-to-Network中继的场景包含：
1)远程UE在覆盖范围外，中继UE在覆盖范围内；
2)远程UE和中继UE都在覆盖范围内，并且在同一个小区；
3)远程UE和中继UE都在覆盖范围内，但在不同小区。
UE-to-UE中继如图2所示，左右两侧为远程UE，中间为中继UE。远程UE和中继UE之间分别通过PC5接口连接。由于两个远程UE距离较远或者通信环境不佳，需要中继UE对两者间的信令和数据进行中继转发。
UE-to-UE中继的场景包含：
1)覆盖范围内：两个远程UE(即源侧UE和目标侧UE)和中继UE都在覆盖范围内；
2)覆盖范围外：两个远程UE(即源侧UE和目标侧UE)和中继UE都在覆盖范围外；
3)部分覆盖：两个远程UE和中继UE中，至少有一个UE在覆盖范围内，并且至少有一个UE在覆盖范围外。
其中，覆盖范围指的是基站的覆盖范围。
在SL中继架构中，远程UE选定了一个中继UE为自己提供中继服务后，会和中继UE建立PC5-RRC连接，以便通过中继UE和基站或者另一个远程UE进行通信。
单播链路的侧行通信测量结果，例如侧行通信RSRP(Sidelink Reference Signal Receiving Power，简称SL-RSRP，参考信号接收功率)可以被用来触发侧行通信中继的选择或者重选。在现有技术中，SL-RSRP的测量参数，例如测量的频点、测量的周期、测量的滤波参数等信息是由中继UE给远程UE配置的。远程UE收到中继UE配置的测量参数需要进行相应的测量配置并且上报测量报告给中继UE。中继UE可以根据自身的需要，选择配置测量参数，或者不配置测量参数。
在中继UE不进行SL-RSRP的测量配置时，远程UE就无法有效地进行SL-RSRP的测量，并根据SL-RSRP的测量结果来触发对中继UE的选择或者重选。
通过本发明，可以最大限度地保障远程UE获取到SL-RSRP的测量配置，并根据该测量配置进行SL-RSRP测量，以便在远程UE和中继UE之间的PC5链路状况不佳时，及时触发对中继UE的选择或者重选。
以下，详细描述本发明对于上述问题的若干实施例。
实施例1
图3是示出了根据本发明的实施例1的由用户设备执行的方法的流程图。
如图3所示，本实施例包括步骤301，303。
在步骤301，当远程UE和中继UE之间建立了PC5-RRC连接(或者单播链路)，远程UE接收中继UE配置的SL-RSRP测量配置参数。
这里，可选地，当远程UE和中继UE之间建立了PC5-RRC连接(或者单播链路)，中继UE总是为远程UE配置SL-RSRP测量配置参数。
其中，中继UE可以是已经确定为远程UE提供中继服务的UE，还可以指具有中继能力的UE，或者指根据上层指示进行中继服务的UE。
可选地，中继UE需要判断和远程UE之间建立的单播链路是用于中继服务的。
可选地，另一种表达方式为：RRCReconfigurationSidelink中的sl-MeasConfig这个信元在UE为中继UE时总是携带或者总是被配置。
可选地，中继UE给远程UE配置SL-RSRP测量配置参数，在中继UE和远程UE之间PC5-RRC连接建立后的第一条PC-RRC消息(例如重配消息)中配置。其中，可选地，该连接建立可以由上层指示。
在步骤303，远程UE接收到中继UE配置的SL-RSRP测量配置参数后，根据其中的配置进行SL-RSRP测量，对SL-RSRP测量进行层三滤波，并根据滤波结果进行中继的选择或者重选。
其中，中继的选择可以指远程UE还没有选择到一个中继UE之前，中继的重选可以指远程UE已经选择了一个中继UE之后。
可选地，当中继UE和远程UE建立PC5-RRC连接时，并不是为远程UE提供中继服务，即这两个UE之间建立的PC5-RRC连接仅是为了进行普通的侧行通信，中继UE也总是为远程UE配置SL-RSRP测量配置参数，用于远程UE进行中继的选择或者重选。
实施例2
图4是示出了根据本发明的实施例2的由用户设备执行的方法的流程图。
如图4所示，本实施例包括步骤401，403。
在步骤401，远程UE接收基站配置的SL-RSRP测量配置参数。
其中，远程UE接收基站配置可能通过系统消息，或者通过RRC专有信令，或者通过中继UE转发(中继UE可能通过单播、组播或者广播的方式转发)。
可选地，该SL-RSRP测量配置参数可以是用于远程UE进行单播链路SL-RSRP测量的，或者是用于远程UE进行中继选择或者重选的SL-RSRP测量，又或者是用于为远程UE的对端UE配置单播链路SL-RSRP测量的，又或者是在用于空口的测量配置中增加的指示某个测量参数同时可以同于远程UE的中继重选或者选择的SL-RSRP测量(例如但不限于：频点，滤波参数，测量周期，参考信号等)。当该SL-RSRP测量配置参数是用于为远程UE的对端UE配置单播链路SL-RSRP测量的，远程UE可以直接将其用于自己的中继选择或者重选的SL-RSRP测量。
其中，中继的选择可以指远程UE还没有选择到一个中继UE之前，中继的重选可以指远程UE已经选择了一个中继UE之后。
远程UE收到的基站配置的SL-RSRP测量配置参数包括但不限于：远程UE需要测量的SL-RSRP的测量对象，测量频点、测量周期等。
在步骤403，远程UE根据SL-RSRP测量配置进行SL-RSRP测量。
远程UE所采用的SL-RSRP测量配置包括但不限于如下可能：
1)当远程UE没有收到中继UE为其配置的SL-RSRP测量配置参数，远程UE使用基站配置的SL-RSRP测量配置参数。进一步的，如果远程UE在覆盖范围外，则远程UE采用预配置的SL-RSRP测量配置参数。
2)远程UE使用基站配置的SL-RSRP测量配置参数。进一步的，如果远程UE在覆盖范围外，则远程UE采用预配置的SL-RSRP测量配置参数。当远程UE收到中继UE配置的SL-RSRP测量配置参数后，则改为采用中继UE配置的SL-RSRP测量配置参数进行SL-RSRP测量。
3)远程UE使用基站配置的SL-RSRP测量配置参数。进一步的，如果远程UE在覆盖范围外，则远程UE采用预配置的SL-RSRP测量配置参数。当远程UE收到中继UE配置的SL-RSRP测量配置参数后，根据其中具体的测量参数对保存的测量进行增加删除或者修改的操作，并根据操作结果得到的SL-RSRP测量配置参数 进行SL-RSRP测量。当再次收到基站配置的SL-RSRP测量配置参数，根据其中具体的测量参数对保存的测量进行增加删除或者修改的操作，并根据操作结果得到的SL-RSRP测量配置参数进行SL-RSRP测量。
其中，可选地，远程UE是否收到了中继UE配置的SL-RSRP测量配置参数，可以通过判断中继UE给远程UE发送的RRCReconfigurationSidelink中的sl-MeasConfig这个信元是否携带了或者是否有效。
实施例3
如果远程UE收到了中继UE配置的SL-RSRP测量配置参数，则远程UE测量SL-RSRP，对SL-RSRP进行层三滤波，并根据滤波后的结果进行中继的选择或重选。
如果远程UE没有收到中继UE配置的SL-RSRP测量配置参数，则远程UE测量SD-RSRP，对SD-RSRP进行层三滤波，并根据滤波后的结果进行中继的选择或重选。
其中，可选地，远程UE是否收到了中继UE配置的SL-RSRP测量配置参数，可以通过判断中继UE给远程UE发送的RRCReconfigurationSidelink中的sl-MeasConfig这个信元是否携带了或者是否有效。
其中，中继的选择可以指远程UE还没有选择到一个中继UE之前，中继的重选可以指远程UE已经选择了一个中继UE之后。
图5是本发明涉及的用户设备UE的简要结构框图。如图5所示，该用户设备UE50包括处理器501和存储器502。处理器501例如可以包括微处理器、微控制器、嵌入式处理器等。存储器502例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器等。存储器502上存储有程序指令。该指令在由处理器501运行时，可以执行本发明详细描述的由用户设备执行的上述方法。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种由用户设备UE执行的方法，包括：
    当作为远程UE的所述UE和中继UE之间建立了PC5-RRC连接即PC5接口无线资源控制连接时，所述UE接收所述中继UE配置的侧行通信参考信号接收功率SL-RSRP测量配置参数；以及
    所述UE在接收到所述中继UE配置的所述SL-RSRP测量配置参数后，根据接收到的所述SL-RSRP测量配置参数进行SL-RSRP测量并对所述SL-RSRP测量进行滤波，并且根据滤波的结果进行中继的选择或者重选。
  2. 根据权利要求1所述的方法，其中，
    所述中继UE判断与所述远程UE之间建立的所述PC5-RRC连接是用于中继服务的连接。
  3. 根据权利要求1所述的方法，其中，
    如果所述远程UE没有接收到所述中继UE配置的所述SL-RSRP测量配置参数，则所述远程UE测量侧行通信发现参考信号接收功率SD-RSRP并对所述SD-RSRP进行滤波，并且根据滤波后的结果进行中继的选择或重选。
  4. 一种由用户设备UE执行的方法，包括：
    当作为中继UE的所述UE和远程UE之间建立了PC5-RRC连接即PC5接口无线资源控制连接时，所述UE总是给所述远程UE配置侧行通信参考信号接收功率SL-RSRP测量配置参数。
  5. 根据权利要求4所述的方法，其中，
    所述中继UE在与所述远程UE之间建立了所述PC5-RRC连接后的第一条PC5-RRC消息中为所述远程UE配置所述SL-RSRP测量配置参数。
  6. 一种由用户设备UE执行的方法，包括：
    作为远程UE的所述UE接收基站配置的侧行通信参考信号接收功率SL-RSRP测量配置参数；以及
    所述UE根据接收到的所述SL-RSRP测量配置参数进行SL-RSRP测量。
  7. 根据权利要求6所述的方法，其中，
    所述远程UE通过系统消息或者通过无线资源控制RRC专有信令来接收所述基站配置的所述SL-RSRP测量配置参数。
  8. 根据权利要求6所述的方法，其中，
    所述远程UE接收到的所述基站配置的所述SL-RSRP测量配置参数包括：所述远程UE需要测量的SL-RSRP的测量对象、测量频点和测量周期中的至少一个。
  9. 根据权利要求6所述的方法，其中，
    所述UE根据接收到的所述SL-RSRP测量配置参数进行所述SL-RSRP测量包括以下情形中的至少一个：
    当所述远程UE没有接收到所述中继UE为其配置的所述SL-RSRP测量配置参数时，所述远程UE使用所述基站配置的所述SL-RSRP测量配置参数，进一步，如果所述远程UE在覆盖范围外，则所述远程UE采用预配置的所述SL-RSRP测量配置参数；
    所述远程UE使用所述基站配置的所述SL-RSRP测量配置参数，进一步，如果所述远程UE在覆盖范围外，则所述远程UE采用预配置的所述SL-RSRP测量配置参数，当所述远程UE接收到所述中继UE配置的所述SL-RSRP测量配置参数后，则改为采用所述中继UE配置的所述SL-RSRP测量配置参数进行所述SL-RSRP测量；以及
    所述远程UE使用所述基站配置的所述SL-RSRP测量配置参数，进一步，如果所述远程UE在覆盖范围外，则所述远程UE采用预配置的所述SL-RSRP测量配置参数，当所述远程UE接收到所述中继UE配置的所述SL-RSRP测量配置参数后，根据接收到的所述SL-RSRP测量配置参数对保存的测量进行增加、删除或者修改的操作，并根据作为操作结果得到的所述SL-RSRP测量配置参数进行所述SL-RSRP测量，当再次收到所述基站配置的所述SL-RSRP测量配置参数，根据接收到的所述SL-RSRP测量配置参数对保存的测量进行增加、删除或者修改的操作，并根据作为操作结果得到的所述SL-RSRP测量配置参数进行所述SL-RSRP测量。
  10. 一种用户设备，包括：
    处理器；以及
    存储器，存储有指令；
    其中，所述指令在由所述处理器运行时执行根据权利要求1至9中的任一项所述的方法。
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