WO2024051648A1 - Procédé mise en œuvre par un équipement utilisateur et équipement utilisateur - Google Patents

Procédé mise en œuvre par un équipement utilisateur et équipement utilisateur 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)
Chinese (zh)
Inventor
刘蕾
刘仁茂
Original Assignee
夏普株式会社
刘蕾
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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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/fr

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

Abstract

La présente invention concerne un procédé mis en œuvre par un équipement utilisateur (UE) et un UE. Le procédé mis en œuvre par l'UE comprend les étapes suivantes : une connexion PC5-RRC est établie entre un UE1 et un UE2 pour une communication en liaison latérale, ou une connexion PC5-RRC de bout en bout est établie entre l'UE1 et l'UE2 au moyen d'un UE relais UE à UE (UE relais U2U) pour une communication en liaison latérale ; et si l'UE1 initie une sélection de relais ou une resélection de relais, l'UE1 effectue au moins les opérations suivantes pour un UE relais U2U de communication en liaison latérale NR candidat : indiquer des informations d'un UE relais U2U de communication en liaison latérale NR candidat satisfaisant un critère de couche d'accès ou des informations d'un UE relais U2U de communication en liaison latérale NR disponible et/ou approprié à une couche supérieure.
PCT/CN2023/116738 2022-09-07 2023-09-04 Procédé mise en œuvre par un équipement utilisateur et équipement utilisateur WO2024051648A1 (fr)

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CN202211092178.4A CN117715248A (zh) 2022-09-07 2022-09-07 由用户设备执行的方法及用户设备
CN202211092178.4 2022-09-07

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