WO2024051648A1 - 由用户设备执行的方法及用户设备 - Google Patents

由用户设备执行的方法及用户设备 Download PDF

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Publication number
WO2024051648A1
WO2024051648A1 PCT/CN2023/116738 CN2023116738W WO2024051648A1 WO 2024051648 A1 WO2024051648 A1 WO 2024051648A1 CN 2023116738 W CN2023116738 W CN 2023116738W WO 2024051648 A1 WO2024051648 A1 WO 2024051648A1
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WO
WIPO (PCT)
Prior art keywords
relay
communication
sidelink
link
rrc connection
Prior art date
Application number
PCT/CN2023/116738
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English (en)
French (fr)
Inventor
刘蕾
刘仁茂
Original Assignee
夏普株式会社
刘蕾
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Application filed by 夏普株式会社, 刘蕾 filed Critical 夏普株式会社
Publication of WO2024051648A1 publication Critical patent/WO2024051648A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of wireless communication technology. More specifically, the present invention relates to a method for user equipment to perform relay selection and reselection in a sideline communication relay architecture and the corresponding user equipment.
  • NR sidelink relaying sidelink communication relay
  • RP-210904 New Study Item on NR Sidelink Relaying The latest version of this work item can be found in the non-patent document: RP-212601 reivised WID NR sidelink relay.
  • One of the goals of this work item is to standardize sideline communication control plane processes, such as management of RRC connections, reception of system messages and reception of paging.
  • the goal of this work item is also to standardize the selection and reselection process for sideline communication relay UEs.
  • This invention discusses the process of relay selection and/or reselection by the source-side UE and the target-side UE performing data and signaling transmission through the relay UE.
  • the method performed by user equipment UE includes: establishing a PC5-RRC connection between the first user equipment UE1 and the second user equipment UE2 for sideline communication, or the UE1 and the UE2
  • the UE establishes an end-to-end PC5-RRC connection for side-link communication through a UE to UE relay user equipment U2U relay.
  • the UE1 initiates relay selection or relay reselection, the UE1 is a candidate.
  • the NR side-link communication U2U relay UE at least performs the following operations: indicating the information of the candidate NR side-link communication U2U relay UE that meets the access layer criteria, or the information of the available and/or suitable NR side-link communication U2U relay UE to the upper layer .
  • the UE1 when the UE1 initiates relay selection or relay reselection, the UE1 is a candidate NR sidelink communication U2U relay.
  • the UE also performs at least one of the following operations: Utilize the measurement results after layer 3 filtering of side-link communication reference signal received power SL-RSRP and/or side-link communication discovery message reference signal received power SD-RSRP for one or more detected NR side-link communication U2U relay UEs Perform execution quality evaluation, and the detected NR side-link communication U2U relay UE is the candidate NR side-link communication U2U relay UE; if the side-link communication reference signal received power SL of the candidate NR side-link communication U2U relay UE- If the measurement result of RSRP and/or side-link communication discovery message reference signal received power SD-RSRP exceeds a certain threshold value, it is determined that the candidate NR side-link communication U2U relay UE meets the requirements of relay selection or relay re-selection.
  • the entry criteria, and/or the NR side-link communication U2U relay UE determined to be the candidate NR side-link communication U2U relay UE is available and/or suitable; and the NR side-link communication U2U relay UE determined to be available and/or suitable
  • One of the relay UEs can be selected or reselected as the relay UE.
  • information about candidate NR side-link communication U2U relay UEs that meet access layer criteria, or information about available and/or suitable NR side-link communication U2U relay UEs is indicated to
  • the operation of the upper layer in the case of relay selection, occurs when the UE1 detects that the PC5 link quality with the UE2 is lower than a certain threshold, and/or the upper layer requires the relay selection. , perform this operation; in the case of relay reselection, when the UE1 detects that the PC5 link quality with the NR sidelink communication U2U relay UE is lower than a certain threshold, and/or the upper layer This operation is performed when the relay reselection is required.
  • the information of the NR side communication U2U relay UE includes: the UE layer two identifier L2-ID of the NR side communication U2U relay UE; and/or the NR side The measurement results of the SL-RSRP and/or the SD-RSRP of the NR side communication U2U relay UE; and/or the connection status of the NR side communication U2U relay UE and the UE2.
  • the UE1 is a source-side UE
  • the UE2 is a target-side UE
  • the UE2 is a source-side UE
  • the UE1 when the UE1 selects or reselects to a suitable NR sidelink communication U2U relay UE, or the relay selection or the relay selection occurs in the UE1
  • the UE1 performs at least one of the following operations: stops the T400 timer of the UE1 for the opposite end UE; stops the uplink/downlink sidelink communication data transmission between the UE1 and the UE2 ; Release the PC5- between the UE1 and the UE2 RRC connection; indicating the release of the PC5-RRC connection between the UE1 and the UE2 to the upper layer of the UE1 for the opposite end UE; and instructing the upper layer to trigger the PC5 unicast chain between the UE1 and the UE2 The release of the road.
  • the UE1 after the UE1 selects or reselects a suitable NR sidelink communication U2U relay UE, the UE1 communicates with the selected or reselected NR sidelink communication U2U A PC5-RRC connection is established between relay UEs, and a PC5-RRC connection is established between the NR side communication U2U relay UE and the UE2.
  • the selected or reselected NR side communication U2U relay UE sends an indication message to notify the UE2 that a new relay connection has been established.
  • the UE2 after the UE2 receives the indication message, it performs at least one of the following operations: releases the PC5-RRC connection between the UE1 and the UE2; The release of the PC5-RRC connection between the UE1 and the UE2 is indicated to the upper layer of the UE1 for the opposite end UE; and the upper layer is instructed to trigger the release of the PC5 unicast link between the UE1 and UE2.
  • a user equipment includes: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform any of the methods according to the first aspect.
  • the source side UE or the target side UE can select or reselect a suitable relay UE, and perform U2U side communication through the selected or reselected relay UE, thereby ensuring business experience and service quality.
  • Figure 1 is a schematic diagram showing UE-to-UE relay.
  • FIG. 2 is a schematic diagram illustrating the control plane protocol stacks of a source-side UE, a relay UE, and a target-side UE of a U2N sidelink communication layer two (L2) relay architecture.
  • L2N sidelink communication layer two
  • FIG. 3 is a flowchart showing the basic process of the method performed by the user equipment UE in Embodiment 1 of the present invention.
  • Figure 4 is a schematic structural block diagram of the user equipment UE involved in the present invention.
  • UE User Equipment user equipment
  • MAC CE MAC control element
  • RLC Radio Link Control wireless link control
  • SDAP Service Data Adaptation Protocol Service Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol packet data convergence protocol
  • RRC Radio Resource Control Radio Resource Control
  • RRC_IDLE RRC idle state
  • RAN Radio Access Network, wireless access layer
  • SCI Sidelink Control Information, side communication control information
  • MIB Master Information Block, master information block
  • New Radio new radio
  • SIB System Information Block, system information block
  • NG-RAN NG Radio Access Network, a new generation of wireless access network
  • DCI Downlink Control Information, downlink control information
  • ADAPT Adaptation layer, side communication adaptation layer
  • PHY physical layer, physical layer
  • RB radio bearer, wireless bearer
  • DRB Data Radio Bearer, data wireless bearer
  • SRB Signalling Radio Bearer, signaling wireless bearer
  • ProSe Proximity based Services: Proximity services
  • V2X Vehicle-to-Everything, vehicles to everything
  • NAS Non-Access-Stratum, non-access layer
  • PC5-S PC5signalling, PC5 signaling
  • SRAP Sidelink Relay Adaptation Protocol, sidelink communication relay adaptation protocol
  • SL-SRB Sidelink Signalling Radio Bearer, sidelink communication signaling wireless bearer
  • SL-DRB Sidelink Data Radio Bearer, sidelink communication data wireless bearer
  • U2U UE-to-UE, UE to UE
  • L2-ID Layer-2ID (identity), layer two identification
  • RSRP Reference Signal Received Power reference signal received power
  • SL-RSRP sidelink RSRP, sidelink communication reference signal received power
  • SD-RSRP sidelink discovery RSRP, sidelink communication discovery message reference signal received power
  • network network or NW
  • base station base station or gNB or eNB
  • RAN can be used interchangeably.
  • the network can be a long-term evolution LTE network, a new radio access technology (New RAT, NR) network, an enhanced
  • New RAT new radio access technology
  • eLTE enhanced Long-term evolution eLTE network
  • 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 the NR device supporting the NR sidelink relay architecture, or may refer to other types of NR devices or LTE devices.
  • the source-side UE and the target-side UE may refer to two UEs connected to each other through Relay UE in the UE-to-UE relay architecture. One of them is the source-side UE, and the other is the target-side UE.
  • the source side (source) can also be called the initiation side (initiation), and the target side (target) can also be called the destination side (destination), which can be used interchangeably in the present invention.
  • sidelink, SL and PC5 can be used interchangeably.
  • “Feedback”, “submit”, “report”, “send”, “transmit” and “inform” can be used interchangeably.
  • "use”, “make available, be available”, “apply”, “implement”, “enable”, “activate”, “ “Perform” etc. can be used interchangeably.
  • “Associate”, “correspond”, and “map” can be used interchangeably.
  • “For” and “associate” can be used interchangeably.
  • upper layer(s) may refer to ProSe layer, or V2X layer, or NAS layer, or PC5-S protocol layer.
  • ProSe layer, V2X layer, NAS layer and PC5-S protocol layer can be used interchangeably.
  • PC5 unicast link and PC5-S link can be used interchangeably.
  • source can be used interchangeably
  • target can be used interchangeably.
  • Remote UE may refer to either source remote UE or target remote UE.
  • the PC5 interface is the interface for control plane and user plane Sidelink communication between UE and UE.
  • the PC5-RRC connection is an AS-layer logical connection between a pair of source layer two IDs and destination layer two IDs.
  • the Upper layer(s) establishes a PC5 unicast link (unicast link) for sidelink unicast communication.
  • a PC5-RRC connection will be established.
  • the layer(s) After the layer(s) establishes the PC5 unicast link, it will instruct the AS layer.
  • the AS layer will establish the PC5-RRC connection after receiving the instruction, or the AS layer will consider that the PC5-RRC connection is established after receiving the instruction (since the PC5-RRC connection is not required to establish PC5-RRC message exchange).
  • the UE can configure the related information of the sidelink communication by sending RRCReconfigurationSidelink (sidelink communication RRC reconfiguration message) to the opposite end UE, such as the configuration of SL-SRB and SL-DRB, sidelink Measurement configuration, etc.
  • the UE starts a T400 timer after sending the RRCReconfigurationSidelink message.
  • the T400 timer will be stopped. . Since the UE may conduct sideline communication with multiple peer UEs at the same time, the RRCReconfigurationSidelink message is sent to a peer UE, and the T400 timer is also started for this peer UE, that is, the T400 timer is for different destinations (destination). of.
  • the UE believes that the sidelink wireless link failure has been detected for the opposite UE (or the target), and the PC5-RRC connection for the opposite UE (or the target) is released, and the PC5-RRC connection is Releases the upper layer(s) indicated for this target.
  • the UE-to-UE relay is shown in Figure 1.
  • the left and right sides are remote UEs and the middle is the relay UE.
  • the remote UE and the relay UE are connected through the PC5 interface respectively. Because the distance between the two remote UEs is long or the communication environment is poor, the relay UE needs to relay and forward the signaling and data between them.
  • UE-to-UE relay scenarios include:
  • both remote UEs i.e., source side UE and target side UE
  • the relay UE are within the coverage area;
  • both remote UEs i.e., source side UE and target side UE
  • relay UE are outside coverage
  • Partial coverage Among the two remote UEs and the relay UE, at least one UE is within the coverage range, and at least one UE is outside the coverage range.
  • the coverage described here refers to whether the UE is within or outside the coverage of the base station.
  • two Remote UEs i.e., source side UE and target side UE
  • PC5-RRC connections with the Relay UE respectively.
  • a PC5-RRC connection will also be established.
  • Two Remote UEs i.e. source side UE and target side UE
  • the control plane protocol stacks of the source side UE, Relay UE and target side UE are shown in Figure 2.
  • PC5 RLC channel refers to the RLC channel used for PC5 interface communication.
  • PC5 Relay RLC channel can refer to the RLC channel that forwards and transmits signaling and data for the L2 U2U relay through the PC5 interface.
  • the PC5 relay RLC channel between the source side UE and the relay UE when the source side UE is connected to the target side UE through Relay UE, the PC5 relay RLC channel between the source side UE and the relay UE, and the PC5 relay RLC channel between the relay UE and the target side UE It can be used to carry data and signaling between the source side UE and the target side UE, that is, it can be used to carry SL-SRB and SL-DRB between the source side UE and the target side UE.
  • the PC5 relay RLC channel between the source side UE and the relay UE can be called source PC5 Relay RLC channel
  • the PC5 relay RLC channel between the relay UE and the target side UE can be called target PC5 Relay RLC
  • a PC5 unicast link can be established between two UEs (that is, two Remote UEs), and then a PC5-RRC connection can be established.
  • the UE can initiate relay selection, that is, try to select the NR sidelink U2U relay UE. Through this relay UE and the opposite end UE is connected to perform relay communication:
  • the UE has the ability to perform NR sidelink U2U Remote UE operations
  • the UE is configured with upper layer(s) and needs to search for NR sidelink U2U relay UE;
  • the UE finds that the PC5 link quality between the UE and the opposite end UE is lower than a certain threshold value (that is, the link quality becomes worse), where the PC5 link quality can be based on the SL of the current PC5 link-
  • the UE discovers that the PC5 link between the UE and the opposite end UE has a radio link failure (radio link failure: RLF);
  • the upper layer(s) of the UE requires relay selection.
  • the application layer triggers the ProSe layer to establish a PC5 unicast link between the Source remote UE and the Relay UE.
  • the ProSe layer instructs the AS layer, and the AS layer establishes the PC5-RRC connection according to the requirements of ProSe.
  • Relay UE and target remote UE also need to establish PC5 unicast link and PC5-RRC connection.
  • Source remote UE The end-to-end PC5 unicast link and the end-to-end PC5-RRC connection can be established through the Relay UE and the target remote UE.
  • the end-to-end PC5 unicast link refers to the PC5 unicast link between the source remote UE and the target remote UE.
  • the end-to-end PC5-RRC connection Refers to the PC5-RRC connection between source remote UE and target remote UE.
  • the Target remote UE may also perform relay selection. It is also necessary to establish the PC5 unicast link and PC5-RRC connection between the Target remote UE and the relay UE, and the PC5 unicast link and PC5-RRC connection between the relay UE and the source remote UE. As well as the PC5 unicast link and PC5-RRC connection between the target remote UE and the source remote UE.
  • Source remote UE and target remote UE have established an end-to-end PC5 unicast link and an end-to-end PC5-RRC connection through a U2U relay UE (that is, there is already a selected U2U relay UE), that is, sideline communication is performed through relay UE , when the remote UE (source remote UE or target remote UE) meets at least one of the following conditions, the remote UE can initiate relay reselection, that is, try to select a new U2U relay UE, through this new U2U relay UE and the pair Remote UE connection at the end of the relay communication:
  • the remote UE has the ability to perform NR sidelink U2U Remote UE operations
  • the remote UE configured by upper layer(s) needs to search for NR sidelink U2U relay UE;
  • the remote UE finds that the PC5 link quality between the remote UE and the current U2U relay UE is lower than a certain threshold (i.e. the link quality becomes worse), where the PC5 link quality can be measured according to the SL-RSRP of the current PC5 link Results or based on SD-RSRP measurement results;
  • the remote UE discovers that the PC5 link between the remote UE and the current U2U relay UE has a radio link failure (radio link failure: RLF);
  • the upper layer(s) of the remote UE requires relay reselection
  • the upper layer(s) of the remote UE requires the release of the PC5-RRC connection between the remote UE and the U2U relay UE;
  • the upper layer(s) of the remote UE requires that the currently selected U2U relay UE is no longer used
  • the remote UE receives a notification message from the U2U relay UE.
  • the notification message may indicate that a wireless link failure has occurred in the PC5 link between the U2U relay UE and the opposite remote UE, or between the U2U relay UE and the opposite remote UE.
  • the PC5-RRC connection is released, or other abnormal conditions occur between the U2U relay UE and the peer remote UE.
  • This invention discusses that in the U2U scenario, the source side UE and the target side UE perform user plane data transmission through the relay UE.
  • the source side UE and the target side UE Side UE processes PC5 unicast link, PC5-RRC connection and related timers.
  • the source side UE or the target side UE can select or reselect a suitable relay UE, and perform U2U side communication through the selected or reselected relay UE, thereby ensuring business experience and service quality.
  • step S101 a PC5-RRC connection is established between UE1 and UE2 for sideline communication, or an end-to-end PC5-RRC connection is established between UE1 and UE2 through a U2U relay UE.
  • RRC connection for side-link communication.
  • step S102 when UE1 initiates relay selection or relay reselection (initiation conditions are as described in the related art), optionally, in step S103, UE1 performs NR sidelink discovery for the search candidate NR sidelink U2U relay UE. )process.
  • UE1 performs at least one of the following operations:
  • the detected NR sidelink U2U relay UEs can be candidate NR sidelinks U2U relay UE.
  • the candidate NR sidelink U2U relay UE is considered to meet the AS layer criteria for relay selection or relay reselection, and can Optionally, the candidate NR sidelink U2U relay UE may be considered to be an available and/or suitable NR sidelink U2U relay UE.
  • NR sidelink U2U relay UE information that will meet AS criteria, or is available and/or appropriate NR sidelink U2U relay UE information is indicated to the upper layer(s); optionally, for the relay selection scenario, UE1 finds that the PC5 link quality between UE1 and UE2 is lower than a certain threshold (i.e. This operation is performed when the link quality deteriorates), and/or the upper layer(s) requires relay selection; optionally, for the relay reselection scenario, the PC5 link quality between UE1 and U2U relay UE is found to be low. This operation is performed when a certain threshold value is reached (i.e., the link quality deteriorates), and/or the upper layer(s) requires relay reselection.
  • a certain threshold i.e., the link quality deteriorates
  • One of the NR sidelink U2U relay UEs deemed available and/or suitable may be selected or reselected as the relay UE.
  • UE1 selects a relay UE through the above operations, or the upper layer(s) indicates to the AS layer a selected relay UE, it can be considered that UE1 has made a relay selection, or that UE1 has selected a suitable NR sidelink U2U relay UE. On.
  • UE1 is reselected to the relay UE after the above operations, or the upper layer(s) indicates to the AS layer a reselected relay UE, it can be considered that relay reselection has occurred in UE1, or that UE1 has been reselected to a suitable NR.
  • sidelink U2U relay UE is on.
  • the information of the NR sidelink U2U relay UE may include but is not limited to: the (source) UE L2-ID of the NR sidelink U2U relay UE, the SL-RSRP and/or of the NR sidelink U2U relay UE. SD-RSRP measurement results, the connection status of the NR sidelink U2U relay UE and UE2 (that is, whether the PC5-RRC connection or PC5 unicast link has been established).
  • UE1 is the source remote UE
  • UE2 is the target remote UE
  • UE1 is the target remote UE
  • UE2 is the source remote UE
  • UE1 when UE1 selects or reselects to a suitable NR sidelink U2U relay UE, or UE1 undergoes relay selection or relay reselection, UE1 performs at least one of the following operations:
  • the T400 timer for UE2 is stopped; in the relay reselection scenario, the T400 timer for the NR sidelink U2U relay UE is stopped, and/or the T400 timer for UE2 is stopped.
  • the upper layer(s) of the target may refer to the upper layer(s) of UE1 for UE2, that is, the upper layer(s) is the upper layer(s) of UE1 that internally manages UE1 to UE2.
  • UE1 is the source remote UE
  • UE2 is the target remote UE
  • UE1 is the target remote UE
  • UE2 is the source remote UE
  • UE1 selects or reselects a suitable NR sidelink U2U relay UE, establishes a PC5-RRC connection between UE1 and the selected or reselected NR sidelink U2U relay UE, and NR sidelink U2U relay UE Establish a PC5-RRC connection with UE2.
  • the selected or reselected NR sidelink U2U relay UE sends an indication message to notify UE2 that a new relay connection has been established.
  • the indication message may include but is not limited to: UE1's (source) L2-ID, NR sidelink U2U relay Information such as the (source) L2-ID of the UE, the indication bit that the new connection is established, etc.
  • UE2 after receiving the indication message, UE2 performs at least one of the following operations:
  • the upper layer(s) of the target may refer to the upper layer(s) of UE1 for UE2, that is, the upper layer(s) is the upper layer(s) of UE1 that internally manages UE1 to UE2.
  • UE1 is the source remote UE
  • UE2 is the target remote UE
  • UE1 is the target remote UE
  • UE2 is the source remote UE
  • FIG 4 is a schematic structural block diagram of the user equipment UE involved in the present invention.
  • the user equipment UE700 includes a processor 701 and a memory 702.
  • the processor 701 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 702 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory.
  • Memory 702 stores program instructions. When this instruction is executed by the processor 701, it can execute the above method executed by the user equipment as described in detail in the present invention.
  • the program running on the device according to the present invention may be a program that causes the 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 (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • Programs for realizing the functions of each embodiment of the present invention can be recorded on a computer-readable recording medium.
  • Corresponding functions can be realized by causing the computer system to read programs recorded on the recording medium and execute these programs.
  • the so-called “computer system” here may be a computer system embedded in the device, which may include an operating system or hardware (such as peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium for short-term dynamic storage of a program, or any other recording medium readable by a computer.
  • circuits eg, single-chip or multi-chip integrated circuits.
  • Circuitry designed to perform the functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • a general-purpose processor can be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit.
  • the present invention is not limited to the above-described embodiment. Although various examples of the 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, etc.

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Abstract

本发明提供一种由用户设备执行的方法及用户设备，所述由用户设备UE执行的方法，包括：第一用户设备UE1与第二用户设备UE2之间建立了PC5-RRC连接进行侧行通信，或者所述UE1与所述UE2之间通过一个UE到UE中继用户设备U2U relay UE建立了端到端的PC5-RRC连接进行侧行通信；在所述UE1发起中继选择或者中继重选的情况下，所述UE1为候选NR侧行通信U2U relay UE至少执行如下操作：将满足接入层准则的候选NR侧行通信U2U relay UE的信息、或可用的和/或合适的NR侧行通信U2U relay UE的信息指示给上层。

Description

由用户设备执行的方法及用户设备 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架构中的中继选择与重选的方法以及相应的用户设备。
背景技术
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。该工作项目的最新版本参见非专利文献：RP-212601 reivised WID NR sidelink relay。该工作项目的目标之一是标准化侧行通信控制面流程，例如RRC连接的管理、***消息的接收和寻呼的接收。该工作项目的目标还包括标准化侧行通信中继UE的选择和重选流程。
2021年12月，RAN#94次全会上，针对版本18的NR sidelink relay enhancements(侧行通信中继增强)的工作项目被提出(参见非专利文献：RP-213585 New WID on NR sidelink relay enhancements)，并获批准。该工作项目的目标之一标准化U2U(UE-to-UE)Relay的控制面流程、Relay选择与重选，发现流程等。
本发明讨论源侧UE和目标侧UE通过中继UE进行数据和信令传输进行中继选择和/或重选的流程。
发明内容
根据本发明的第一方面的由用户设备UE执行的方法，包括：第一用户设备UE1与第二用户设备UE2之间建立了PC5-RRC连接进行侧行通信，或者所述UE1与所述UE2之间通过一个UE到UE中继用户设备U2U relay UE建立了端到端的PC5-RRC连接进行侧行通信；在所述UE1发起中继选择或者中继重选的情况下，所述UE1为候选NR侧行通信U2U relay UE至少执行如下操作：将满足接入层准则的候选NR侧行通信U2U relay UE的信息、或可用的和/或合适的NR侧行通信U2U relay UE的信息指示给上层。
根据本发明的第一方面的所述方法，在所述UE1发起中继选择或者中继重选的情况下，所述UE1为候选NR侧行通信U2U relay UE还执行如下操作的至少一者：利用侧行通信参考信号接收功率SL-RSRP和/或侧行通信发现消息参考信号接收功率SD-RSRP进行层三滤波后的测量结果，对一个或者多个检测到的NR侧行通信U2U relay UE进行执行质量评估，所述检测到的NR侧行通信U2U relay UE为所述候选NR侧行通信U2U relay UE；如果所述候选NR侧行通信U2U relay UE的侧行通信参考信号接收功率SL-RSRP和/或侧行通信发现消息参考信号接收功率SD-RSRP的测量结果超过某一门限值，则确定为所述候选NR侧行通信U2U relay UE满足中继选择或者中继重选的接入层准则，和/或确定为所述候选NR侧行通信U2U relay UE为可用的和/或合适的NR侧行通信U2U relay UE；以及确定为可用的和/或合适的NR侧行通信U2U relay UE中的一个能够被选择或重选为中继UE。
根据本发明的第一方面的所述方法，关于将满足接入层准则的候选NR侧行通信U2U relay UE的信息、或可用的和/或合适的NR侧行通信U2U relay UE的信息指示给上层的操作，在是中继选择的情况下，在所述UE1检测到与所述UE2之间的PC5链路质量低于某个门限值，和/或上层要求进行所述中继选择时，进行该操作；在是中继重选的情况下，在所述UE1检测到与所述NR侧行通信U2U relay UE之间的PC5链路质量低于某个门限值，和/或上层要求进行所述中继重选时，进行该操作。
根据本发明的第一方面的所述方法，所述NR侧行通信U2U relay UE的信息包括：所述NR侧行通信U2U relay UE的UE层二标识L2-ID；和/或所述NR侧行通信U2U relay UE的所述SL-RSRP和/或所述SD-RSRP的测量结果；和/或所述NR侧行通信U2U relay UE和所述UE2的连接状态。
根据本发明的第一方面的所述方法，如果所述UE1为源侧UE，则所述UE2为目标侧UE，如果所述UE1为目标侧UE，则所述UE2为源侧UE。
根据本发明的第一方面的所述方法，在所述UE1选择或者重选到一个合适的所述NR侧行通信U2U relay UE上，或者所述UE1发生了所述中继选择或者所述中继重选的情况下，所述UE1进行如下操作的至少一者：停止所述UE1对于对端UE的T400定时器；停止所述UE1与所述UE2之间的上行/下行侧行通信数据传输；释放所述UE1与所述UE2之间的PC5- RRC连接；将所述UE1与所述UE2之间的PC5-RRC连接的释放指示给所述UE1对于对端UE的上层；以及指示上层触发所述UE1与所述UE2之间的PC5单播链路的释放。
根据本发明的第一方面的所述方法，在所述UE1选择或者重选到一个合适的NR侧行通信U2U relay UE之后，所述UE1与选择或重选到的所述NR侧行通信U2U relay UE之间建立PC5-RRC连接，所述NR侧行通信U2U relay UE与所述UE2之间建立PC5-RRC连接。
根据本发明的第一方面的所述方法，选择或者重选到的所述NR侧行通信U2U relay UE发送指示消息，通知所述UE2新的中继连接已经建立。
根据本发明的第一方面的所述方法，在所述UE2收到是所述指示消息后，进行如下操作的至少一者：释放所述UE1与所述UE2之间的PC5-RRC连接；将所述UE1与所述UE2之间的PC5-RRC连接的释放指示给所述UE1对于对端UE的上层；以及指示上层触发所述UE1与UE2之间的PC5单播链路的释放。
根据本发明的第三方面的用户设备，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所述第一方面的任意所述方法。
本发明的有益效果
通过本发明，可以使源侧UE或者目标侧UE选择或者重选到合适的中继UE，通过选择或者重选的中继UE进行U2U的侧行通信，从而保证业务体验和服务质量。
附图说明
图1是示出UE-to-UE中继的示意图。
图2是示出U2N侧行链路通信层二(L2)中继架构的源侧UE、中继UE和目标侧UE的控制面协议栈的示意图。
图3是示出本发明的实施例1中由用户设备UE执行的方法的基本过程的流程图。
图4是本发明涉及的用户设备UE的简要结构框图。
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，
UE：User Equipment用户设备
NR：New Radio新一代无线技术
MAC：Medium Access Control多媒体接入控制
MAC CE：MAC control element MAC控制元素
RLC：Radio Link Control无线链路控制
SDAP：Service Data Adaptation Protocol服务数据适配协议
PDCP：Packet Data Convergence Protocol分组数据汇聚协议
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
SL：Sidelink
SCI：Sidelink Control Information，侧行通信控制信息
AS：Access Stratum，接入层
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，***信息块
NG-RAN：NG Radio Access Network，新一代无线接入网络
DCI：Downlink Control Information，下行控制信息
ADAPT：Adaptation layer，侧行通信适配层
PHY：physical layer，物理层
RB：radio bearer，无线承载
DRB：Data Radio Bearer，数据无线承载
SRB：Signalling Radio Bearer，信令无线承载
ProSe：Proximity based Services：近距离服务
V2X：Vehicle-to-Everything，车到万物
NAS：Non-Access-Stratum，非接入层
PC5-S：PC5signalling，PC5信令
SRAP：Sidelink Relay Adaptation Protocol，侧行通信中继适配协议
SL-SRB：Sidelink Signalling Radio Bearer，侧行通信信令无线承载
SL-DRB：Sidelink Data Radio Bearer，侧行通信数据无线承载
U2U：UE-to-UE，UE到UE
L2：Layer 2，层二架构
L2-ID：Layer-2ID(identity)，层二标识
RSRP：Reference Signal Received Power参考信号接收功率
SL-RSRP：sidelink RSRP，侧行通信参考信号接收功率
SD-RSRP：sidelink discovery RSRP，侧行通信发现消息参考信号接收功率
本发明中，网络(network或NW)、基站(base station或gNB或eNB)和RAN可互换使用，所述网络可以是长期演进LTE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，也可以指支持NR sidelink中继架构的NR设备，也可以指其他类型的NR设备或者LTE设备。源侧UE和目标侧UE可以指UE到UE中继架构中通过Relay UE互相连接的两个UE，其中一者为源侧UE，则另一者为目标侧UE。源侧(source)也可以称为发起侧(initiation)，目标侧(target)也可以称为目的侧(destination)，在本发明中可以互换使用。
对于U2U场景，“Relay”，“U2U Relay”和“L2 U2U Relay”可以互 换使用。“Remote”，“U2U Remote”和“L2 U2U Remote”可以互换使用。“source UE”，“source remote UE”，“U2U source UE”，“L2 U2U source remote UE”和“L2 U2U source UE”和可以互换使用。“target UE”，“target remote UE”，“U2U target UE”，“L2 U2U target remote UE”和“L2 U2U target UE”可以互换使用。可选地，还可以在这些名称中增加“NR sidelink”的修饰或者限定。
本发明中，sidelink、SL和PC5可以互换使用。“反馈(feedback)”，“递交(submit)”，“报告、上报(report)”，“发送(send)”，“传输(transmit或transport)”，“通知(inform)”可以互换使用。“使用(use)”，“使可获得、使有效(be available)”，“采用(apply)”，“应用(implement)”，“使能(enable)”，“激活(active)”，“执行(perform)”等可以互换使用。“关联(associate)”，“对应(correspond)”，“映射(map)”可以互换使用。“对于(for)”和“关联(associate)”可以互换使用。
本发明中，upper layer(s)可以指ProSe layer，或者V2X layer，或者NAS layer，或者PC5-S protocol layer。本发明中ProSe layer，V2X layer，NAS layer和PC5-S protocol layer可以互换使用。本发明中，PC5 unicast link和PC5-S link可以互换使用。
本发明中，“source”，“source side”，“source part”可以互换使用，“target”，“target side”，“target part”可以互换使用。可选地，还可以在这些名称中增加“L2 U2U”或“L2 U2U Relay”的修饰或者限定。
本发明中，如无特殊说明，Remote UE既可以指source remote UE也可以指target remote UE。
需要说明的是，在本说明书中，用“和”、“或”、“和/或”连接的两者可能表示在不同应用场景下对同一意旨的不同表述方法，二者之间可能存在包含与被包含的关系，未必是指完全不同的内容。
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。Upper layer(s)为sidelink单播通信建立PC5单播链路(unicast link)，一个PC5单播链路建立就会对应有一个PC5-RRC连接建立。Upper  layer(s)建立了PC5 unicast link后会指示AS层，AS层收到指示后建立PC5-RRC连接，或者AS层收到指示后认为PC5-RRC连接建立了(由于PC5-RRC连接建立不需要PC5-RRC消息交互)。当PC5-RRC连接建立后，UE可以通过给对端UE发送RRCReconfigurationSidelink(侧行通信RRC重配消息)对侧行通信的相关信息进行配置，例如对SL-SRB和SL-DRB的配置，对sidelink测量的配置等。UE发送了RRCReconfigurationSidelink消息后启动一个T400定时器，在T400定时器超时前如果收到RRCReconfigurationFailureSidelink(侧行通信RRC重配失败)消息或者RRCReconfigurationCompleteSidelink(侧行通信RRC重配完成)消息，则停止T400定时器。由于所述UE可能同时和多个对端UE进行侧行通信，RRCReconfigurationSidelink消息发给某个对端UE，T400定时器也是针对这个对端UE启动的，即T400定时器是针对不同目标(destination)的。当T400定时器超时，UE认为对于该对端UE(或该目标)检测到了sidelink无线链路失败，认为对于该对端UE(或该目标)的PC5-RRC连接被释放，将PC5-RRC连接释放指示给该目标的upper layer(s)。
UE-to-UE中继如图1所示，左右两侧为远端UE，中间为中继UE。远端UE和中继UE之间分别通过PC5接口连接。由于两个远端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：两个远端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：两个远端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：两个远端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。
这里所述的覆盖范围指的是UE是否处在基站的覆盖范围内还是覆盖范围外。
对于NR sidelink L2 U2U中继架构，两个Remote UE(即源侧UE和目标侧UE)分别和Relay UE建立PC5-RRC连接，两个远端UE(即源侧UE和目标侧UE)之间也会建立PC5-RRC连接。两个Remote UE(即源侧UE 和目标侧UE)通过Relay UE进行侧行通信。
对于U2U侧行链路通信层二(L2)中继架构，源侧UE、Relay UE和目标侧UE的控制面协议栈如图2所示。
PC5 RLC信道是指用于PC5接口通信的RLC信道。PC5中继RLC信道(PC5 Relay RLC channel)可以指通过PC5接口为L2 U2U relay中继转发传输信令和数据的RLC信道。在U2U架构中，源侧UE通过Relay UE和目标侧UE连接时，源侧UE和中继UE之间的PC5中继RLC信道，以及中继UE和目标侧UE之间的PC5中继RLC信道可以用来承载源侧UE和目标侧UE之间的数据和信令，即用来承载源侧UE和目标侧UE之间的SL-SRB和SL-DRB。源侧UE和中继UE之间的PC5中继RLC信道可以称为source PC5 Relay RLC channel，中继UE和目标侧UE之间的PC5中继RLC信道可以称为target PC5 Relay RLC channel。
Relay选择
两个UE(即两个Remote UE)之间为了进行侧行通信可以建立PC5 unicast link，继而建立PC5-RRC连接。当其中一个UE(可能是源侧UE也可能是目标侧UE)满足如下条件中的至少一条时，所述UE可以发起relay选择，即尝试选择NR sidelink U2U relay UE，通过这个relay UE和对端UE连接而进行中继通信：
-所述UE具有执行NR sidelink U2U Remote UE操作的能力；
-所述UE被upper layer(s)配置需要搜索NR sidelink U2U relay UE；
-所述UE发现与对端UE之间的PC5链路质量低于某个门限值(即链路质量变差)，其中PC5链路质量可以根据当前PC5链路的SL-
RSRP测量结果或者根据SD-RSRP测量结果判定；
-所述UE发现与对端UE之间的PC5链路发生了无线链路失败(radio link failure：RLF)；
-所述UE的upper layer(s)要求进行relay选择。
-Source remote UE选定了一个Relay UE为自己提供中继服务后，应用层触发ProSe layer对Source remote UE和Relay UE之间建立PC5 unicast link。当PC5 unicast link建立后，ProSe layer指示AS层，AS层根据ProSe的要求建立PC5-RRC连接。Relay UE和target remote UE也需要建立PC5 unicast link和PC5-RRC连接。Source remote UE 可以通过Relay UE和target remote UE建立端到端PC5 unicast link和端到端的PC5-RRC连接，端到端的PC5 unicast link指source remote UE和target remoteUE之间的PC5 unicastlink，端到端的PC5-RRC连接指source remote UE和target remote UE之间的PC5-RRC连接。Target remote UE也可能会进行relay选择，同样也要建立Target remote UE和relay UE之间的PC5 unicast link和PC5-RRC连接，relay UE和source remote UE之间的PC5 unicast link和PC5-RRC连接，以及target remote UE和source remote UE之间的PC5 unicast link和PC5-RRC连接。
Relay重选
Source remote UE和target remote UE通过一个U2U relay UE建立了端到端PC5 unicast link和端到端的PC5-RRC连接(即已经有了一个选择好的U2U relay UE)，即通过relay UE进行侧行通信，当remoteUE(source remote UE或者target remote UE)满足如下条件中的至少一条时，所述remote UE可以发起relay重选，即尝试选择一个新的U2U relay UE，通过这个新的U2U relay UE和对端的remote UE连接而进行中继通信：
-所述remote UE具有执行NR sidelink U2U Remote UE操作的能力；
-所述remote UE被upper layer(s)配置需要搜索NR sidelink U2U relay UE；
-所述remote UE发现与当前U2U relay UE之间的PC5链路质量低于某个门限值(即链路质量变差)，其中PC5链路质量可以根据当前PC5链路的SL-RSRP测量结果或者根据SD-RSRP测量结果；
-所述remote UE发现与当前U2U relay UE之间的PC5链路发生了无线链路失败(radio link failure：RLF)；
-所述remote UE的upper layer(s)要求进行relay重选；
-所述remote UE的upper layer(s)要求释放所述remote UE与U2U relay UE之间的PC5-RRC连接；
-所述remote UE的upper layer(s)要求不再使用当前选择的U2U relay UE；
-所述remote UE的AS层释放与当前U2U relay UE之间的PC5-RRC 连接；
-所述remote UE接收到U2U relay UE的通知消息，通知消息可能指示U2U relay UE和对端remote UE之间的PC5链路发生了无线链路失败、或者U2U relay UE和对端remote UE之间的PC5-RRC连接释放了，或者U2U relay UE和对端remote UE之间的其他异常情况。
本发明讨论U2U场景中，源侧UE和目标侧UE通过中继UE进行用户面数据传输，源侧UE或目标侧UE在进行中继选择和中继重选的过程中，源侧UE和目标侧UE对PC5 unicast link、PC5-RRC连接和相关定时器的处理。通过本发明，可以使源侧UE或者目标侧UE选择或者重选到合适的中继UE，通过选择或者重选的中继UE进行U2U的侧行通信，从而保证业务体验和服务质量。
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
在本实施例中，如图3所示，在步骤S101中，UE1和UE2之间建立了PC5-RRC连接进行侧行通信，或者UE1和UE2之间通过一个U2U relay UE建立端到端的PC5-RRC连接进行侧行通信。在步骤S102中，当UE1发起relay选择或者relay重选(发起条件如前文相关技术中所述)，可选地，在步骤S103中，UE1为搜索候选NR sidelink U2U relay UE执行NR sidelink发现(discovery)流程。可选地，UE1执行如下操作的至少一种：
-用SL-RSRP和/或SD-RSRP进行层三滤波后的测量结果对一个或者多个检测到的NR sidelink U2U relay UE进行执行质量评估，检测到的NR sidelink U2U relay UE可以为候选NR sidelink U2U relay UE。
-如果候选NR sidelink U2U relay UE的SL-RSRP和/或SD-RSRP测量结果超过某一门限值，则认为所述候选NR sidelink U2U relay UE满足relay选择或者relay重选的AS层准则，可选地，可以认为所述候选NR sidelink U2U relay UE为可用的(available)和/或合适的(suitable)NR sidelink U2U relay UE。
-将满足AS准则的候选的NR sidelink U2U relay UE信息，或可用的 和/或合适的NR sidelink U2U relay UE的信息指示给upper layer(s)；可选地，对于relay选择场景，在UE1发现与UE2之间的PC5链路质量低于某个门限值(即链路质量变差)，和/或upper layer(s)要求进行relay选择时，进行该操作；可选地，对于relay重选场景，在UE1发现与U2U relay UE之间的PC5链路质量低于某个门限值(即链路质量变差)，和/或upper layer(s)要求进行relay重选时，进行该操作。
-认为可用的和/或合适的NR sidelink U2U relay UE中的一个可以被选择或重选为中继UE。
UE1经过上述操作选择到了中继UE，或者upper layer(s)指示给AS层一个选择到的中继UE，都可以认为UE1发生了relay选择，或者认为UE1选择到一个合适的NR sidelink U2U relay UE上了。
UE1经过上述操作重选到了中继UE，或者upper layer(s)指示给AS层一个重选到的中继UE，都可以认为UE1发生了relay重选，或者认为UE1重选到一个合适的NR sidelink U2U relay UE上了。
其中，可选地，NR sidelink U2U relay UE的信息可以包括但不限于：所述NR sidelink U2U relay UE的(source源)UE L2-ID，所述NR sidelink U2U relay UE的SL-RSRP和/或SD-RSRP测量结果，所述NR sidelink U2U relay UE和UE2的连接状态(即是否已经建立了PC5-RRC连接或者PC5 unicast link)。
UE1如果为source remote UE，则UE2为target remote UE；UE1如果为target remote UE，则UE2为source remote UE。
实施例2
可选地，基于实施例1，当UE1选择或者重选到一个合适的NR sidelink U2U relay UE上，或者UE1发生了relay选择或者relay重选，UE1进行如下操作的至少一种：
-停止该目标的T400定时器。在relay选择场景下，即停止对于UE2的T400定时器；在relay重选场景下，即停止对于NR sidelink U2U relay UE的T400定时器，和/或停止对于UE2的T400定时器。可选地，在停止T400定时器之前，可以判断T400定时器是否在运行，只有T400定时器正在运行，才需要停止。
-停止UE1与UE2之间的上行/下行sidelink数据传输。
-释放UE1和UE2之间PC5-RRC连接，即认为对于UE2(或该目标)的PC5-RRC连接被释放。
-将UE1和UE2之间PC5-RRC连接释放指示给(该目标的)upper layer(s)。其中，可选地，(该目标的upper layer(s))可以指UE1的对于UE2的upper layer(s)，即该upper layer(s)是UE1内部管理UE1到UE2的upper layer(s)。
-指示upper layer(s)触发UE1和UE2之间的PC5 unicast link释放。
UE1如果为source remote UE，则UE2为target remote UE；UE1如果为target remote UE，则UE2为source remote UE。
实施例3
可选地，基于实施例1，UE1选择或者重选到一个合适的NR sidelink U2U relay UE，UE1和选择或者重选到的NR sidelink U2U relay UE之间建立PC5-RRC连接，NR sidelink U2U relay UE与UE2之间建立PC5-RRC连接。
可选地，选择或者重选到的NR sidelink U2U relay UE发送指示消息通知UE2新的relay连接已经建立，该指示消息中可以包含但不限于：UE1的(source)L2-ID，NR sidelink U2U relay UE的(source)L2-ID，新连接建立完成的指示比特位等信息。
可选地，UE2收到该指示消息后，进行如下操作的至少一种：
-释放UE1和UE2之间PC5-RRC连接，即认为对于UE2(或该目标)的PC5-RRC连接被释放。
-将UE1和UE2之间PC5-RRC连接释放指示给(该目标的)upper layer(s)。其中，可选地，(该目标的upper layer(s))可以指UE1的对于UE2的upper layer(s)，即该upper layer(s)是UE1内部管理UE1到UE2的upper layer(s)。
-指示upper layer(s)触发UE1和UE2之间的PC5 unicast link释放。
UE1如果为source remote UE，则UE2为target remote UE；UE1如果为target remote UE，则UE2为source remote UE。
图4是本发明涉及的用户设备UE的简要结构框图。如图4所示，该用户设备UE700包括处理器701和存储器702。处理器701例如可以包括微处理器、微控制器、嵌入式处理器等。存储器702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702上存储有程序指令。该指令在由处理器701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***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***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***”可以是嵌入在该设备中的计算机***，可以包括操作***或硬件(如***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：
    第一用户设备UE1与第二用户设备UE2之间建立了PC5-RRC连接进行侧行通信，或者所述UE1与所述UE2之间通过一个UE到UE中继用户设备U2U relay UE建立了端到端的PC5-RRC连接进行侧行通信；
    在所述UE1发起中继选择或者中继重选的情况下，
    所述UE1为候选NR侧行通信U2U relay UE至少执行如下操作：
    将满足接入层准则的候选NR侧行通信U2U relay UE的信息、或可用的和/或合适的NR侧行通信U2U relay UE的信息指示给上层。
  2. 根据权利要求1所述的方法，其特征在于，
    在所述UE1发起中继选择或者中继重选的情况下，
    所述UE1为候选NR侧行通信U2U relay UE还执行如下操作的至少一者：
    利用侧行通信参考信号接收功率SL-RSRP和/或侧行通信发现消息参考信号接收功率SD-RSRP进行层三滤波后的测量结果，对一个或者多个检测到的NR侧行通信U2U relay UE进行执行质量评估，所述检测到的NR侧行通信U2U relay UE为所述候选NR侧行通信U2U relay UE；
    如果所述候选NR侧行通信U2U relay UE的侧行通信参考信号接收功率SL-RSRP和/或侧行通信发现消息参考信号接收功率SD-RSRP的测量结果超过某一门限值，则确定为所述候选NR侧行通信U2U relay UE满足中继选择或者中继重选的接入层准则，和/或确定为所述候选NR侧行通信U2U relay UE为可用的和/或合适的NR侧行通信U2U relay UE；以及
    确定为可用的和/或合适的NR侧行通信U2U relay UE中的一个能够被选择或重选为中继UE。
  3. 根据权利要求1所述的方法，其特征在于，
    关于将满足接入层准则的候选NR侧行通信U2U relay UE的信息、或可用的和/或合适的NR侧行通信U2U relay UE的信息指示给上层的操作，
    在是中继选择的情况下，在所述UE1检测到与所述UE2之间的PC5链路质量低于某个门限值，和/或上层要求进行所述中继选择时，进行该操作；
    在是中继重选的情况下，在所述UE1检测到与所述NR侧行通信U2U  relay UE之间的PC5链路质量低于某个门限值，和/或上层要求进行所述中继重选时，进行该操作。
  4. 根据权利要求2所述的方法，其特征在于，
    所述NR侧行通信U2U relay UE的信息包括：
    所述NR侧行通信U2U relay UE的UE层二标识L2-ID；和/或
    所述NR侧行通信U2U relay UE的所述SL-RSRP和/或所述SD-RSRP的测量结果；和/或
    所述NR侧行通信U2U relay UE和所述UE2的连接状态。
  5. 根据权利要求1所述的方法，其特征在于，
    如果所述UE1为源侧UE，则所述UE2为目标侧UE，
    如果所述UE1为目标侧UE，则所述UE2为源侧UE。
  6. 根据权利要求1-5中任一项所述的方法，其特征在于，
    在所述UE1选择或者重选到一个合适的所述NR侧行通信U2U relay UE上，或者所述UE1发生了所述中继选择或者所述中继重选的情况下，所述UE1进行如下操作的至少一者：
    停止所述UE1对于对端UE的T400定时器；
    停止所述UE1与所述UE2之间的上行/下行侧行通信数据传输；
    释放所述UE1与所述UE2之间的PC5-RRC连接；
    将所述UE1与所述UE2之间的PC5-RRC连接的释放指示给所述UE1对于对端UE的上层；以及
    指示上层触发所述UE1与所述UE2之间的PC5单播链路的释放。
  7. 根据权利要求1-5中任一项所述的方法，其特征在于，
    在所述UE1选择或者重选到一个合适的NR侧行通信U2U relay UE之后，
    所述UE1与选择或重选到的所述NR侧行通信U2U relayUE之间建立PC5-RRC连接，所述NR侧行通信U2U relay UE与所述UE2之间建立PC5-RRC连接。
  8. 根据权利要求7所述的方法，其特征在于，
    选择或者重选到的所述NR侧行通信U2U relay UE发送指示消息，通知所述UE2新的中继连接已经建立。
  9. 根据权利要求8所述的方法，其特征在于，
    在所述UE2收到是所述指示消息后，进行如下操作的至少一者：
    释放所述UE1与所述UE2之间的PC5-RRC连接；
    将所述UE1与所述UE2之间的PC5-RRC连接的释放指示给所述UE1对于对端UE的上层；以及
    指示上层触发所述UE1与UE2之间的PC5单播链路的释放。
  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中任一项所述的方法。
PCT/CN2023/116738 2022-09-07 2023-09-04 由用户设备执行的方法及用户设备 WO2024051648A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110461020A (zh) * 2019-08-16 2019-11-15 展讯通信（上海）有限公司 用于辅链路的中继选择方法及装置、存储介质、终端
DE102021113144A1 (de) * 2020-05-20 2021-11-25 Intel Corporation Relais-(neu-)auswahl über sidelink in zellularen netzwerken
CN114501414A (zh) * 2020-10-27 2022-05-13 夏普株式会社 发现中继ue的方法、搜索中继ue的方法及用户设备
CN114630388A (zh) * 2020-12-11 2022-06-14 夏普株式会社 方法及用户设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110461020A (zh) * 2019-08-16 2019-11-15 展讯通信（上海）有限公司 用于辅链路的中继选择方法及装置、存储介质、终端
DE102021113144A1 (de) * 2020-05-20 2021-11-25 Intel Corporation Relais-(neu-)auswahl über sidelink in zellularen netzwerken
CN114501414A (zh) * 2020-10-27 2022-05-13 夏普株式会社 发现中继ue的方法、搜索中继ue的方法及用户设备
CN114630388A (zh) * 2020-12-11 2022-06-14 夏普株式会社 方法及用户设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Remaining issues on relay selection and reselection", 3GPP DRAFT; R2-2010347, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. electronic; 20201102 - 20201113, 23 October 2020 (2020-10-23), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051943027 *

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