WO2023130362A1 - 收发信息的方法、装置和通信系统 - Google Patents

收发信息的方法、装置和通信系统 Download PDF

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Publication number
WO2023130362A1
WO2023130362A1 PCT/CN2022/070768 CN2022070768W WO2023130362A1 WO 2023130362 A1 WO2023130362 A1 WO 2023130362A1 CN 2022070768 W CN2022070768 W CN 2022070768W WO 2023130362 A1 WO2023130362 A1 WO 2023130362A1
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message
rrc
configuration
srap
establishment
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PCT/CN2022/070768
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English (en)
French (fr)
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李国荣
贾美艺
王昕�
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富士通株式会社
李国荣
贾美艺
王昕�
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Priority to PCT/CN2022/070768 priority Critical patent/WO2023130362A1/zh
Publication of WO2023130362A1 publication Critical patent/WO2023130362A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the embodiment of the present application relates to the technical field of communications.
  • 5G version 17 (Release 17, R17) is studying side link relay (Sidelink relay, SL relay) technology, which includes the scenario of terminal equipment (for example, UE) to network equipment relay (UE-to-Network Relay) .
  • UE terminal equipment
  • UE-to-Network Relay network equipment relay
  • the new air interface (NR) Uu link is used on the Uu interface of the relay terminal equipment (relay UE), and the NR sidelink chain is assumed to be used on the PC5 interface between the remote terminal equipment (remote UE) and the relay UE road.
  • the relay UE is also called UE-to-Network relay UE.
  • Fig. 1 is a schematic diagram of a scenario of relaying from a terminal device to a network device.
  • the remote UE 101 is outside the coverage of the network device 100 (out of coverage, OOC), and the relay UE 102 is within the coverage of the network device 100 (in coverage, IC).
  • the remote UE 101 is within the coverage of the network device 100 (in coverage, IC)
  • the relay UE 102 is within the coverage of the network device 100 (in coverage, IC).
  • the remote UE 101 is within the coverage (in coverage, IC) of the network device 100a
  • the relay UE 102 is within the coverage (in coverage, IC) of the network device 100
  • the network device 100a different from the network device 100.
  • the side link relay adaptation protocol (SRAP, Sidelink Relay Adaptation Protocol) is introduced.
  • SRAP Sidelink Relay Adaptation Protocol
  • the SRAP sublayer is located above the radio link control (RLC) sublayer.
  • SDAP Uu Service Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • SRAP SRAP
  • RLC RLC
  • MAC Media Access Control
  • PHY Physical
  • Figure 2 is a schematic diagram of the control plane protocol stack of UE-to-Network relay.
  • the SRAP sublayer on the PC5 interface is only used for bearer mapping purposes.
  • the SRAP sublayer does not appear in the PC5 hop.
  • the SRAP sublayer does not appear on the PC5 hop, but the SRAP sublayer appears on the Uu hop for the downlink (DL) and uplink (UL).
  • the SRAP sublayer supports uplink bearer mapping between the ingress (ingress) PC5 radio link control channel (PC5 RLC channels) used for relaying and the egress (egress) Uu RLC channel on the Uu interface of the Relay UE.
  • PC5 RLC channels PC5 radio link control channel
  • Uu radio bearer Uu Radio bearer
  • a local remote UE ID are included in the Uu SRAP header, so that the gNB will receive the data packet for a specific PDCP entity and the remote UE. Correct Uu radio barer association.
  • the PC5 SRAP sublayer of the Relay UE supports uplink (UL) bearer mapping between the Uu radio bearer of the remote UE and the egress Uu RLC channel.
  • the PC5 SRAP sublayer of the Remote UE supports UL bearer mapping between the Uu radio bearer of the remote UE and the egress PC5 RLC channel.
  • the Uu SRAP sublayer on the gNB side supports DL bearer mapping, and maps the end-to-end radio bearer (for example, SRB and/or DRB) of the remote UE to the Uu RLC channel on the Uu interface of the relay UE.
  • end-to-end radio bearer for example, SRB and/or DRB
  • -Uu SRAP sublayer supports remote UE identification for downlink services.
  • the identification information of the Uu radio bearer of the Remote UE and a local remote UE ID are put in the Uu SRAP header by the gNB, so that the relay UE can map the data packet received from the Uu radio bearer of the remote UE to its related PC5 RLC channel.
  • the PC5 SRAP sublayer of the Relay UE supports downlink bearer mapping between the Uu radio bearer of the remote UE and the egress PC5 RLC channel.
  • FIG. 3 is a schematic diagram of the RRC connection (RRC connection) establishment process when the Remote UE accesses the network device through the relay UE, and the RRC connection re-establishment (re-establishment) and RRC resume (resume) processes are similar to this.
  • RRC connection RRC connection
  • the RRC connection establishment process includes the following operations:
  • the Remote UE and the Relay UE perform a discovery process, and use the process in NR V2X to establish a PC5-RRC connection.
  • the Remote UE sends the first RRC message (for example, RRCSetupRequest) to establish a connection between the remote UE and the gNB through the relay UE, using the specified PC5 RLC bearer (PC5 RLC bearer) configuration. If the Relay UE is not in the RRC connected mode (RRC_CONNECTED), then the relay UE needs to establish its own connection when receiving the message on the specified PC5 RLC bearer.
  • the gNB responds to the RRCSetup message to the Remote UE. The delivery of this RRCSetup to the Remote UE uses the specified PC5 RLC bearer configuration.
  • the gNB and the Relay UE perform the relay channel establishment process on the Uu interface. According to the configuration of gNB, the Relay UE and the remote UE establish an RLC channel for relaying the SRB1 on the PC5 interface to the remote UE.
  • the Remote UE sends the RRCSetupComplete message to the gNB using the SRB1 relay channel on PC5 and the SRB1 relay channel on Uu configured for the relay UE. Afterwards, the Remote UE has an RRC connection on the Uu interface.
  • the Remote UE and gNB follow the process of the Uu interface to establish security, and the security message is forwarded through the relay UE.
  • the gNB sends an RRC reconfiguration message (RRCReconfiguration message) to the Remote UE via the relay UE to establish SRB2/DRBs for relay.
  • the Remote UE sends an RRC Reconfiguration Complete message (RRCReconfigurationComplete message) to the gNB via the relay UE as a response.
  • the gNB establishes an additional RLC bearer or channel (bearer or channel) between the gNB and the relay UE for the relay service.
  • SRAP For the process of Figure 3, the relevant configuration of SRAP is included in the RRC Reconfiguration message (corresponding to operation 6 of Figure 3); for SRB0, SRAP does not appear on the PC5 interface, and for other SRBs (for example, SRB1 or SRB2) and DRB, PC5 interface defaults to SRAP, that is, uses the bearer mapping function of SRAP.
  • the inventor of the present application has found that: in the process shown in Figure 3, the RRC setup complete (RRC setup complete) message is sent using SRB1.
  • the SRAP function needs to be used on PC5;
  • the RRC re-establishment message, RRC re-establishment complete message, RRC resume message and RRC resume complete message are all sent using SRB1. Since these SRB1 messages are transmitted before the RRC reconfiguration process, the remote UE has not yet received them.
  • PC5 SRAP configuration so it is not clear how to use SRAP on PC5 interface to transmit these messages on SRB1.
  • a first terminal device for example, remote UE
  • a second terminal device for example, relay UE
  • the first terminal device connects to the second terminal device (relay UE) via the second terminal device (relay UE).
  • Radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message and a radio resource control reconfiguration (RRC reconfiguration) message through a default configuration
  • the first A terminal device for example, remote UE
  • the first terminal device establishes a PC5 connection with a second terminal device (for example, relay UE)
  • the first terminal device receives a radio resource control establishment (RRC setup) message via the second terminal device
  • the radio resource control restarts At least one of the (RRC resume) message and the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the Sidelink Relay Adaptation Protocol (SRAP).
  • SRAP Sidelink Relay Adaptation Protocol
  • the remote UE and the relay UE use correct configurations to send and/or receive related RRC messages, preventing the remote UE and the relay UE from failing in message transmission due to configuration inconsistencies, and helping the remote UE communicate with network devices via the relay UE Connecting or resuming the connection ensures the service quality and user experience of the remote UE.
  • an apparatus for sending and receiving information which is applied to a first terminal equipment (remote UE), the apparatus includes a first transceiver unit, and the first transceiver unit is configured to:
  • the first transceiver unit receives a radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message, and a radio resource control reconfiguration ( RRC reconfiguration) message at least one.
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration radio resource control reconfiguration
  • an apparatus for sending and receiving information which is applied to a second terminal equipment (relay UE), the apparatus includes a second transceiver unit, and the second transceiver unit is configured to:
  • the second transceiver unit establishes a PC5 connection with the first terminal equipment (remote UE);
  • the second transceiver unit sends a radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message, and a radio resource control reconfiguration ( RRC reconfiguration) message at least one.
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration radio resource control reconfiguration
  • an apparatus for sending and receiving information which is applied to a first terminal equipment (remote UE), the apparatus includes a third transceiver unit, and the third transceiver unit is configured to:
  • the third transceiver unit establishes a PC5 connection with the second terminal equipment (relay UE);
  • the third transceiver unit receives a radio resource control establishment (RRC setup) message, a radio resource control restart (RRC resume) message, and a radio resource control re-establishment (RRC re-establishment) message via the second terminal device (relay UE)
  • RRC setup radio resource control establishment
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • SRAP Sidelink Relay Adaptation Protocol
  • an apparatus for sending and receiving information which is applied to a second terminal equipment (relay UE), the apparatus includes a fourth transceiver unit, and the fourth transceiver unit is configured to:
  • the fourth transceiver unit establishes a PC5 connection with the first terminal equipment (remote UE);
  • the fourth transceiver unit sends a radio resource control establishment (RRC setup) message, a radio resource control restart (RRC resume) message, and a radio resource control re-establishment (RRC re-establishment) message to the first terminal device (remote UE)
  • RRC setup radio resource control establishment
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • At least one of the RRC setup message, the RRC resume message and the RRC re-establishment message includes at least one of the relevant configuration of the Sidelink Relay Adaptation Protocol (SRAP).
  • SRAP Sidelink Relay Adaptation Protocol
  • One of the beneficial effects of the embodiments of the present application is: to enable the remote UE and the relay UE to use correct configurations to send and/or receive related RRC messages, to prevent the remote UE and the relay UE from failing in message transmission due to configuration inconsistencies, and to facilitate The remote UE connects or restores the connection with the network device through the relay UE, which ensures the service quality and user experience of the remote UE.
  • FIG. 1 is a schematic diagram of a scenario where a terminal device is relayed to a network device
  • Fig. 2 is a schematic diagram of the control plane protocol stack of UE-to-Network relay
  • Figure 3 is a schematic diagram of the RRC connection establishment process when the Remote UE accesses the network device through the relay UE;
  • Fig. 4 is a schematic diagram of the method for sending and receiving information in the embodiment of the first aspect
  • FIG. 5 is a schematic diagram of the process of establishing a UE-to-Network relay connection corresponding to Embodiment 1;
  • a of Figure 6 is a schematic diagram of the flow of the RRC re-establishment (RRC re-establishment) process
  • b of Fig. 6 is another schematic diagram of the flow of the RRC re-establishment (RRC re-establishment) process
  • Fig. 7 is a schematic diagram of the device for sending and receiving information described in the embodiment of the third aspect
  • Fig. 8 is a schematic diagram of the device for sending and receiving information described in the embodiment of the fourth aspect
  • Fig. 9 is a schematic diagram of the device for sending and receiving information described in the embodiment of the fifth aspect.
  • Fig. 10 is a schematic diagram of the device for sending and receiving information according to the embodiment of the sixth aspect
  • Fig. 11 is a schematic diagram of the device for sending and receiving information described in the embodiment of the seventh aspect
  • Fig. 12 is a schematic diagram of the device for sending and receiving information described in the embodiment of the eighth aspect
  • Fig. 13 is a schematic diagram of the device for sending and receiving information described in the embodiment of the ninth aspect
  • Fig. 14 is a schematic diagram of a terminal device in a communication system according to an embodiment of the eighth aspect.
  • Fig. 15 is a schematic diagram of network devices in the communication system of the embodiment of the tenth aspect.
  • the terms “first”, “second”, etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or time order of these elements, and these elements should not be referred to by these terms restricted.
  • the term “and/or” includes any and all combinations of one or more of the associated listed items.
  • the terms “comprising”, “including”, “having” and the like refer to the presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
  • the term “communication network” or “wireless communication network” may refer to a network conforming to any of the following communication standards, such as New Radio (NR, New Radio), Long Term Evolution (LTE, Long Term Evolution), Enhanced Long-term evolution (LTE-A, LTE-Advanced), wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access), high-speed packet access (HSPA, High-Speed Packet Access), etc.
  • NR New Radio
  • New Radio Long Term Evolution
  • LTE-A Long-term evolution
  • LTE-A Long-term evolution
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to any stage of communication protocols, such as but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G , New Radio (NR, New Radio), etc., and/or other communication protocols that are currently known or will be developed in the future.
  • Network device refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device.
  • Network equipment may include but not limited to the following equipment: integrated access and backhaul node (IAB-node), base station (BS, Base Station), access point (AP, Access Point), sending and receiving point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.
  • IAB-node integrated access and backhaul node
  • BS Base Station
  • AP access point
  • TRP Transmission Reception Point
  • MME mobile management entity
  • MME Mobile Management Entity
  • gateway server
  • RNC Radio Network Controller
  • BSC Base Station Controller
  • the base station may include but not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and may also include Remote Radio Head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power nodes (such as femeto, pico, etc.).
  • Node B Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power nodes such as femeto, pico, etc.
  • base station may include some or all of their functions, each base station may provide communication coverage for a particular geographic area.
  • the term "cell” can refer to a base station and/or its coverage area depending on the context in which the term is used.
  • the term "User Equipment” (UE, User Equipment) or “terminal equipment” (TE, Terminal Equipment or Terminal Device), for example, refers to a device that accesses a communication network through a network device and receives network services.
  • a terminal device may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a relay device, a router Equipment, stations, etc.
  • the terminal equipment may include but not limited to the following equipment: Cellular Phone (Cellular Phone), Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication equipment, handheld equipment, machine type communication equipment, laptop computer, Cordless phones, smartphones, smart watches, routers, digital cameras, and more.
  • Cellular Phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem wireless communication equipment
  • handheld equipment machine type communication equipment
  • laptop computer Cordless phones
  • smartphones smart watches, routers, digital cameras, and more.
  • the terminal device can also be a machine or device for monitoring or measurement, such as but not limited to: a machine type communication (MTC, Machine Type Communication) terminal, Vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, etc.
  • MTC Machine Type Communication
  • Vehicle communication terminal device to device (D2D, Device to Device) terminal
  • M2M Machine to Machine
  • network side or “network device side” refers to a side of the network, which may be a certain base station, or may include one or more network devices as above.
  • user side or “terminal side” or “terminal device side” refers to a side of a user or a terminal, which may be a certain UE, or may include one or more terminal devices as above.
  • the high-level signaling may be, for example, radio resource control (RRC) signaling; for example, it is called an RRC message (RRC message), for example, it includes MIB, system information (system information), and a dedicated RRC message; or it is called RRC IE (RRC information element).
  • RRC radio resource control
  • the high-level signaling may also be, for example, MAC (Medium Access Control) signaling; or called MAC CE (MAC control element). But the present application is not limited thereto.
  • the first terminal device may be the remote UE 101 shown in Figure 1
  • the second terminal device may be the relay UE 102 shown in Figure 1
  • the network device may be the network device shown in Figure 1 100.
  • the first terminal device can communicate with the network device through the second terminal device, that is, the communication path is an indirect path (indirect path).
  • the second terminal device sends a message to the first terminal device (for example, remote UE), which means that: the second terminal device sends the message generated by itself to the first terminal device terminal device; or, the second terminal device forwards the message received from the network device to the first terminal device, wherein the second terminal device does not parse the message, or the second terminal device does not use the protocol layer corresponding to the message
  • the message is parsed, or the second terminal device transparently sends the message, and the like.
  • a radio resource control establishment (RRC setup) message, a radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message, and a radio resource control reconfiguration (RRC reconfiguration) message, etc. are generated by the first The second terminal device forwards it to the first terminal device.
  • the second terminal device sends a message to the network device (for example, gNB), which means that: the second terminal device sends the message generated by itself to the network device; or, the second terminal device will send the message from
  • the message received by the first terminal device is forwarded to the network device, wherein the second terminal device does not parse the message, or the second terminal device does not use the protocol layer corresponding to the message to parse the message, or the second terminal device
  • the message is sent transparently, etc.
  • the radio resource control re-establishment complete (RRC re-establishment complete) message and the radio resource control reconfiguration complete (RRC reconfiguration complete) message are forwarded by the second terminal device to the network device.
  • the embodiment of the first aspect of the present application provides a method for sending and receiving information.
  • Fig. 4 is a schematic diagram of the method for sending and receiving information in the embodiment of the first aspect. As shown in Figure 4, the methods for sending and receiving information include:
  • the first terminal device establishes a PC5 connection with the second terminal device
  • the first terminal device receives a radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message and a radio resource control reconfiguration (RRC reconfiguration) message through the second terminal device through the default configuration.
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration radio resource control reconfiguration
  • At least one of the ) messages includes relevant configuration of the Sidelink Relay Adaptation Protocol (SRAP).
  • SRAP Sidelink Relay Adaptation Protocol
  • the default configuration includes, for example, a default sidelink RLC bearer configuration (sidelink RLC bearer configuration) and/or a default SRAP-related configuration, etc., and the default configuration may also be a prescribed or predefined configuration wait.
  • the default sidelink radio link control bearer configuration may be the default configuration used by the sidelink RLC bearer (or sidelink RLC channel) used for the SRBO message transmission of the first terminal device, using the The side link RLC bearer configured by default is called SL-RLC0, and the default configuration is called SL-RLC0 default configuration.
  • the SL-RLCO default configuration may include at least one of the following: RLC mode (such as transparent mode TM or acknowledged mode AM), sequence number length (sn-field Length, such as a value of 12), recombination timing device (t-Reassembly), logical channel identifier (for example, the value is 4), priority (for example, the value is 1), priority bit rate (for example, the value is infinite) and logical channel group (for example, the value is 0) .
  • RLC mode such as transparent mode TM or acknowledged mode AM
  • sequence number length such as a value of 12
  • t-Reassembly recombination timing device
  • logical channel identifier for example, the value is 4
  • priority for example, the value is 1
  • priority bit rate for example, the value is infinite
  • logical channel group for example, the value is 0
  • the default sidelink radio link control bearer configuration may be a default configuration used by the sidelink RLC bearer (or sidelink RLC channel) used for the specific SRB1 message transmission of the first terminal device,
  • the specific SRB1 message may include at least one of RRC resume, RRC re-establishment, and RRC reconfiguration messages.
  • the side link RLC bearer using this default configuration is called SL-RLC1, and the default configuration is called SL-RLC1 default configuration. .
  • the default configuration of SL-RLC1 may include at least one of the following: RLC mode (for example, acknowledgment mode AM), RLC sequence number length (sn-field Length, for example, the value is 12), reassembly timer (t -Reassembly), logical channel identifier (for example, the value is 4), priority (for example, the value is 1), priority bit rate (for example, the value is infinite), and logical channel group (for example, the value is 0).
  • RLC mode for example, acknowledgment mode AM
  • RLC sequence number length for example, the value is 12
  • t -Reassembly reassembly timer
  • logical channel identifier for example, the value is 4
  • priority for example, the value is 1)
  • priority bit rate for example, the value is infinite
  • logical channel group for example, the value is 0
  • the default SRAP-related configuration may include at least one of the following: a local/temporary identifier of the first terminal device (remote UE), an added mapping list, and a deleted mapping list.
  • the added mapping list may include at least one of the following: the radio bearer identity (RB-Identity) of the remote UE and the PC5 RLC channel configuration information (or side link RLC bearer configuration information) corresponding to the radio bearer.
  • the default SRAP-related configuration includes the default SRAP configuration of SRBO and/or the default SRAP configuration of SRB1.
  • the RB-Identity of the remote UE can be 0 or SRBO
  • the PC5 RLC channel configuration information can be the side link RLC bearer configuration
  • the index takes a value of 0, and the side link RLC bearer configuration index may correspond to side link RLC configuration and/or side link MAC logical channel configuration.
  • the side link RLC configuration includes the RLC mode (such as TM or AM) and its corresponding parameters.
  • the RLC mode when the RLC mode is AM mode, its corresponding parameters may include the length of the side link sequence number (for example, the value is 12) At least one of , polling retransmission time (sl-T-PollRetransmit), polling PDU (sl-PollPDU), polling byte (sl-PollByte) and maximum retransmission threshold, etc.; side link MAC logical channel configuration Can include at least one of the following: priority (for example, 1), priority bit rate (for example, infinite), token bucket size length (for example, infinite), whether to allow type 1 configuration authorization (for example, not allowed), whether Enable HARQ feedback (for example, the value is enabled), the allowed subcarrier spacing list (for example, allow all subcarrier spacing), the maximum PUSCH duration (for example, the value is 0.25 milliseconds or 0.5 milliseconds, etc.), logical channel group (for example, the value is 0), the scheduling request identifier (for example, the value is 0, etc.), and whether
  • the RB-Identity of the remote UE can take a value of 1 or SRB1
  • the PC5 RLC channel configuration information (or side link RLC bearer configuration information) can be the side link RLC bearer configuration
  • the value of the index may be an integer between 1 and 512, for example, the default value is 1, and the side link RLC bearer configuration index may correspond to side link RLC configuration and/or side link MAC logical channel configuration.
  • the side link RLC configuration includes the RLC mode AM and its corresponding parameters, and the corresponding parameters may include the length of the side link sequence number (for example, the value is 12), poll retransmission time (sl-T-PollRetransmit), round At least one of polling PDU (sl-PollPDU), polling byte (sl-PollByte) and maximum retransmission threshold, etc.; side link MAC logical channel configuration can include at least one of the following: priority (for example, 1), priority Bit rate (for example, infinite), token bucket size length (for example, infinite), whether to allow type 1 configuration authorization (for example, not allowed), whether to enable HARQ feedback (for example, the value is enabled), allowed Carrier spacing list (for example, all subcarrier spacing is allowed), maximum PUSCH duration (for example, the value is 0.25 milliseconds or 0.5 milliseconds, etc.), logical channel group (for example, the value is 0), scheduling request identifier (for example, the value is 0, etc.
  • the first terminal device when the first terminal device sends a radio resource control re-establishment request (RRC re-establishment request) message or a radio resource control restart request (RRC resume request) message, or the first terminal device initiates a radio resource control re-establishment process Or when the radio resource control process is restarted, the SRB1 default SRAP-related configuration and/or the SL-RLC1 default configuration may be used for the SRB1.
  • RRC re-establishment request radio resource control re-establishment request
  • RRC resume request radio resource control restart request
  • the first terminal device for example, remote UE
  • the second terminal device for example, relay UE
  • the first terminal device for example, remote UE
  • the second terminal device for example, relay UE
  • the correct configuration to send and/or receive relevant RRC messages on the PC5 interface to prevent message transmission failures caused by inconsistent configuration between the remote UE and the relay UE, and help the remote UE to re-establish or restore the connection with the network device via the relay UE.
  • the service quality and user experience of the remote UE are guaranteed.
  • the RRC setup message (for example, the message is transmitted using SRB0) includes related configurations of SRAP. in:
  • the related configuration of SRAP includes the related configuration of SRAP for SRB1.
  • the relevant configuration of the SRAP of SRB1 may include at least one of the following: a local/temporary identifier of the first terminal device (remote UE) and an added mapping list.
  • the added mapping list may include at least one of the following: the radio bearer identity (RB-Identity) of the remote UE and the PC5 RLC channel configuration information (or side link RLC bearer configuration information) corresponding to the radio bearer.
  • the RB-Identity of the remote UE can be 1 or SRB1
  • the PC5 RLC channel configuration information (or side link RLC bearer configuration information) can be the side link RLC bearer configuration index
  • the side link RLC bearer configuration index can correspond to the side link Link RLC configuration and/or side link MAC logical channel configuration.
  • the side link RLC configuration includes the RLC mode AM and its corresponding parameters, and the corresponding parameters may include the length of the side link sequence number, polling retransmission time, polling PDU, polling byte and maximum retransmission threshold, etc.
  • the side link MAC logical channel configuration may include at least one of the following: priority, priority bit rate, token bucket size length, whether to allow type 1 configuration authorization, whether to enable HARQ feedback, and allowed subcarriers Interval list, maximum PUSCH duration, logical channel group, scheduling request identifier, and whether to apply the SR delay timer of the logical channel of the link, etc.
  • the RRC setup request message (sent by the remote UE to the gNB via the relay UE) and the RRC setup message (sent by the gNB to the remote UE via the relay UE) are transmitted on the PC5 interface using the default configuration of SL-RLC0.
  • the Remote UE After the Remote UE receives the SRAP related configuration in the RRC setup message, it can perform at least one of the following operations: establish an SRAP entity, configure the parameters of the SRAP entity according to the SRAP related configuration, and set the UE identifier in the RRC setup message ( For example, UE-IdentityRemote) is applied as the cell radio network temporary identifier (C-RNTI) of the remote UE, based on the relevant configuration of SRAP (for example, using the parameters of the configured SRAP entity) to send the radio resource control establishment complete (RRC setup complete) information.
  • C-RNTI cell radio network temporary identifier
  • FIG. 5 is a schematic diagram of the process of establishing a UE-to-Network relay connection corresponding to Embodiment 1. As shown in Figure 5, the process includes the following operations:
  • the Remote UE discovers the relay UE, and a PC5 connection is established between the two.
  • the Remote UE sends an RRC setup request (RRC setup request) message to the relay UE.
  • RRC setup request RRC setup request
  • Operation 3a Operation 3b.
  • the Relay UE reports the L2 ID of the remote UE to the gNB through the Sidelink UE Information (SUI) message, and the gNB sends the RRC reconfiguration message to the relay UE, which configures the SRAP configuration of the relay UE, where It may include the SRAP configuration of the Uu interface and the SRAP configuration of the PC5 interface.
  • SAI Sidelink UE Information
  • the relay UE forwards the RRC setup request sent by the remote UE in operation 2 to the gNB.
  • the gNB sends an RRC setup message to the relay UE, and the RRC setup message includes the relevant configuration of SRAP for the remote UE.
  • the relay UE forwards the RRC setup message to the remote UE.
  • the Remote UE performs operations corresponding to SRAP-related configurations, such as: establishing an SRAP entity; and/or, configuring parameters of the SRAP entity according to SRAP-related configurations; and/or, setting the UE identifier in the RRC setup message ( For example, UE-IdentityRemote) is applied as the cell radio network temporary identifier (C-RNTI) of the remote UE, etc.
  • SRAP-related configurations such as: establishing an SRAP entity; and/or, configuring parameters of the SRAP entity according to SRAP-related configurations; and/or, setting the UE identifier in the RRC setup message ( For example, UE-IdentityRemote) is applied as the cell radio network temporary identifier (C-RNTI) of the remote UE, etc.
  • C-RNTI cell radio network temporary identifier
  • the Remote UE sends a radio resource control setup complete (RRC setup complete) message based on the relevant configuration of SRAP (for example, using the parameters of the configured SRAP entity).
  • RRC setup complete radio resource control setup complete
  • the Relay UE forwards the RRC setup complete message sent by the Remote UE to the gNB.
  • the default configuration in operation 402 may be, for example, the default SRAP configuration of SRB1 and/or the default configuration of SL-RLC1.
  • the relay UE uses the default SRAP related configuration and/or SL-RLC1 default configuration on the PC5 interface The configuration is sent to the remote UE.
  • the relay UE has been configured with the SRAP configuration of the Uu interface and the SRAP configuration of the PC5 interface by the network device, when the relay UE receives the SRB1 message sent by the gNB to the remote UE via the relay UE at the Uu interface , it is necessary to determine whether to use the default configuration on the PC5 interface for the SRB1 message or to use the SRAP configuration of the PC5 interface configured by the network device to send it to the remote UE.
  • the SRB1 message received by the relay UE is the first SRB1 message to be received after the remote UE sends the SRB0 message to the gNB, or if the relay UE receives the SRB1 bearer RRC resume message or RRC re-establishment message, then Use the default configuration on the PC5 interface to send the message to the remote UE, otherwise, use the SRAP configuration of the PC5 interface configured by the network device on the PC5 interface to send the message to the remote UE.
  • Embodiment 2 when the remote UE sends an RRC re-establishment request message or an RRC resume request message (these two messages are sent by SRB0), it uses the default SRAP-related configuration and/or SL-RLC1 default configuration for SRB1, To receive the RRC resume message or RRC re-establishment message sent by gNB using SRB1.
  • a of Figure 6 is a schematic diagram of the flow of the RRC re-establishment (RRC re-establishment) process.
  • b of FIG. 6 is another schematic diagram of the flow of the RRC re-establishment (RRC re-establishment) process.
  • the RRC resume process is similar to the RRC re-establishment process, that is, the remote UE sends an RRC resume request via the relay UE, receives the RRC resume message sent by the gNB via the relay UE, and sends an RRC resume complete message to the gNB via the relay UE.
  • the RRC resume complete message and/or the RRC re-establishment complete message sent by the remote UE to the relay UE may adopt the default SRAP related configuration and/or Or SL-RLC1 default configuration.
  • the RRC resume message and/or the RRC re-establishment message may include the relevant configuration of the SRAP of the remote UE.
  • the Remote UE can apply the relevant configuration of the SRAP, and send the RRC resume complete message and/or the RRC re-establishment complete message.
  • SRAP For the related configuration of SRAP, refer to the description in Embodiment 1.
  • RRC re-establishment (RRC re-establishment) process shown in FIG. 6 a and FIG. 6 b will be described respectively.
  • Operation 1 The Remote UE and the Relay UE perform a discovery process, and use the NR V2X process to establish a PC5-RRC connection.
  • the Remote UE uses the default configuration of SL-RLC0 to send an RRC re-establishment request message (transmitted using SRB0) to the relay UE.
  • the Remote UE uses default SRAP related configurations for SRB1 (for example, SRB1 default SRAP configurations) and/or SL-RLC1 default configurations.
  • Relay UE reports remote UE's L2 ID to gNB through Sidelink UE Information (SUI) message, gNB sends RRC reconfiguration message to relay UE, which configures SRAP configuration of relay UE, which can include SRAP configuration of Uu interface and PC5 interface SRAP configuration, etc.
  • SAI Sidelink UE Information
  • the Relay UE uses Uu SRAP configuration to forward the RRC re-establishment request message of the remote UE to the gNB.
  • the gNB sends an RRC re-establishment message to the remote UE via the relay UE.
  • the Relay UE can know that the received message is the SRB1 message of the remote UE.
  • the Relay UE uses the default SRAP configuration and/or SL-RLC1 default configuration on the PC5 interface, and sends the SRB1 message to the remote UE.
  • the Remote UE uses the default SRAP related configuration and/or SL-RLC1 default configuration, and sends an RRC re-establishment complete message to the relay UE.
  • the Relay UE forwards the RRC re-establishment complete message to the gNB.
  • the gNB sends an RRC reconfiguration message to the remote UE via the relay UE, and the RRC reconfiguration message may include the relevant configuration of the SRAP of the remote UE.
  • the RRC reconfiguration message can be sent using default SRAP related configuration and/or SL-RLC1 default configuration.
  • the remote UE applies the relevant configuration of the SRAP of the remote UE included in the RRC reconfiguration message.
  • the Remote UE sends the RRC reconfiguration complete message to the gNB via the relay UE.
  • Operation 1 to Operation 5 are the same as Operation 1 to Operation 5 in the flow described in a of FIG. 6 .
  • the gNB sends an RRC re-establishment message to the remote UE via the relay UE.
  • the RRC re-establishment message includes the relevant configuration of SRAP of the remote UE. According to the information in the Uu SRAP header, the Relay UE can know that the received message is the SRB1 message of the remote UE.
  • the Relay UE uses the default SRAP related configuration and/or SL-RLC1 default configuration on the PC5 interface, and sends the received SRB1 message of the remote UE to the remote UE.
  • Operation 8 The Remote UE performs corresponding operations according to the relevant configuration of SRAP included in the RRC re-establishment message, such as establishing an SRAP entity and performing relevant configuration of the SRAP, etc.
  • the Remote UE sends an RRC re-establishment complete message on the PC5 interface using the relevant configuration of SRAP.
  • the RRC re-establishment complete message is forwarded by the relay UE to the gNB through the Uu interface.
  • the default configuration described in operation 402 may be, for example, the default SRAP configuration of SRBO and/or the default configuration of SL-RLCO.
  • the relay UE uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 on the PC5 interface to send the RRC resume message and/or RRC re-establishment message to the remote UE.
  • RRC re-establishment (RRC re-establishment) process corresponding to Embodiment 3 is similar to Figure 6 a and Figure 6 b, the difference is that:
  • the Relay UE does not use SRAP (or SRAP does not appear, etc.) on the PC5 interface, but uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 to send RRC re-establishment messages or RRC resume messages.
  • the Remote UE does not use SRAP to receive the RRC re-establishment message or RRC resume message, but uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 to receive.
  • the remote UE uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 will The RRC re-establishment complete message or the RRC resume complete message is sent to the relay UE.
  • the relay UE may send the RRC reconfiguration message to the remote UE using the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0.
  • the remote UE applies the relevant configuration of the SRAP, and, in operation 9, the remote UE based on For the corresponding SRAP configuration, send the RRC re-establishment complete message or the RRC resume complete message to the relay UE.
  • the first terminal device for example, remote UE
  • the second terminal device for example, relay UE
  • Use correct configuration to send and/or receive related RRC messages to prevent message transmission failures caused by inconsistency between remote UE and relay UE, and help remote UE to connect or restore connection with network equipment through relay UE, ensuring remote UE service quality and user experience.
  • the embodiment of the second aspect of the present application provides a method for sending and receiving information.
  • the method for sending and receiving information may include remote UE operations on a Relay Adaptation Protocol (SRAP) entity.
  • SRAP Relay Adaptation Protocol
  • SRAP may include PC5 SRAP or Side-Link Relay Adaptation Protocol (SL SRAP).
  • SL SRAP Side-Link Relay Adaptation Protocol
  • the establishment of the SRAP (for example, PC5 SRAP or SL SRAP) entity by the remote UE may be performed in at least one of the following processes:
  • the first terminal equipment selects or reselects a second terminal equipment (relay UE);
  • the first terminal device (remote UE) initiates the RRC connection establishment process and/or the RRC reestablishment process and/or the RRC resume process via the second terminal device (relay UE);
  • the first terminal equipment sends RRC setup request and/or RRC re-establishment request and/or RRC resume request via the second terminal equipment (relay UE);
  • the first terminal equipment receives RRC setup and/or RRC re-establishment and/or RRC resume and/or RRC reconfiguration messages via the second terminal equipment (relay UE); and
  • the first terminal device receives the RRC reconfiguration message from the path switch to the second terminal device (relay UE) (direct-to-indirect path switch) from the gNB;
  • the remote UE can configure, reconfigure or modify the SRAP (PC5 SRAP or SL SRAP) entity in at least one of the following processes:
  • the first terminal device uses default SRAP related configuration
  • the first terminal equipment receives RRC setup and/or RRC re-establishment and/or RRC resume and/or RRC reconfiguration messages including SRAP related configuration;
  • the release of the SRAP (PC5 SRAP or SL SRAP) entity by the remote UE can be performed in at least one of the following processes:
  • the first terminal device switches from communicating with the gNB via the relay to directly communicating with the gNB (indirect-to-direct path switch);
  • the PC5 connection (eg PC5-RRC connection or PC5 unicast link) between the first terminal equipment (remote UE) and the second terminal equipment (relay UE) is released;
  • the first terminal device enters a RRC idle (RRC_Idle) or RRC deactivated (RRC_Inactive) state.
  • the method for sending and receiving information may include relay UE operating on a Relay Adaptation Protocol (SRAP) entity.
  • SRAP Relay Adaptation Protocol
  • the operation of the relay UE on the SRAP entity may include establishment, configuration, reconfiguration, modification or release of the SRAP entity.
  • SRAP can include PC5 SRAP or UuSRAP or SL SRAP).
  • the establishment of the SRAP (PC5 SRAP or SL SRAP) entity by the relay UE can be performed in at least one of the following processes:
  • the remote UE can configure, reconfigure or modify the PC5 SRAP or SL SRAP entity under the following conditions:
  • the release of the PC5 SRAP or SL SRAP entity by the relay UE may be performed in at least one of the following processes:
  • the first terminal device switches from communicating with the network device via the second terminal device to directly communicating with the network device (indirect-to-direct path switch);
  • the PC5 connection (eg PC5-RRC connection or PC5 unicast link) between the first terminal equipment (remote UE) and the second terminal equipment (relay UE) is released;
  • the establishment of the Uu SRAP entity by the relay UE may be performed in at least one of the following processes:
  • the configuration, reconfiguration or modification of the Uu SRAP entity by the relay UE can be performed under the following conditions:
  • the release of the Uu SRAP entity by the relay UE can be performed under the following conditions:
  • the second terminal equipment no longer has a PC5 connection with a first terminal equipment (remote UE).
  • the embodiment of the second aspect of the present application stipulates the related operations of remote UE and relay UE on PC5 SRAP entity and/or SL SRAP entity, which helps remote UE and relay UE to correctly use SRAP function and configuration for message delivery, and ensure network equipment Correctly identify the remote UE and its radio bearer.
  • the embodiment of the third aspect provides a device for sending and receiving information.
  • a device for sending and receiving information Applied to the first terminal equipment, for example, remote UE 101 in FIG. 1 .
  • the function of the apparatus for sending and receiving information corresponds to the operation of the first terminal device in the method for sending and receiving information in the embodiment of the first aspect.
  • Fig. 7 is a schematic diagram of the device for sending and receiving information according to the embodiment of the third aspect.
  • the device 700 for sending and receiving information includes a first transceiver unit 701, and the first transceiver unit 701 is configured to:
  • the first transceiver unit receives a radio resource control resume (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message, and a radio resource control reconfiguration (RRC reconfiguration) message through the second terminal device (relay UE) through a default configuration. ) at least one of the messages.
  • RRC resume radio resource control resume
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration radio resource control reconfiguration
  • the default configuration includes a default sidelink RLC bearer configuration (sidelink RLC bearer configuration) and/or a default sidelink relay adaptation protocol (SRAP) related configuration.
  • sidelink RLC bearer configuration sidelink RLC bearer configuration
  • SRAP sidelink relay adaptation protocol
  • the default side link radio link control bearer configuration is a side link radio link control 0 (SL-RLC0) default configuration or a side link radio link control 1 (SL-RLC1) default configuration.
  • the default SRAP-related configuration includes at least one of the following: a local or temporary identifier of the first terminal device (remote UE), an added mapping list, and a deleted mapping list.
  • the default SRAP-related configuration includes the default SRAP configuration of Signaling Radio Bearer 0 (SRB0) and/or the default SRAP configuration of Signaling Radio Bearer 1 (SRB1).
  • the first transceiver unit 701 uses side link radio link control bearer configuration 1 (SL-RLC1) to receive A signaling radio bearer 1 (SRB1) message, where the SRB1 message carries the radio resource control resume (RRC resume) message and/or the radio resource control re-establishment (RRC re-establishment) message, or, the SRB1 message is The first SRB1 message to be received by the first terminal device (remote UE) after the signaling radio bearer 0 (SRB0) message of the first terminal device (remote UE) is sent to the network device.
  • SL-RLC1 side link radio link control bearer configuration 1
  • the first transceiver unit 701 is also configured to:
  • the first transceiving unit uses the default SRA configuration of SRB1 and/or uses the default configuration of SL-RLC1 for SRB1.
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first transceiver unit 701 uses the default SRAP configuration of SRB1 and/or the default configuration of SL-RLC1 to send the radio resource control restart complete ( RRC resume complete) message and/or the radio resource control re-establishment complete (RRC re-establishment complete) message.
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first transceiving unit 701 applies the relevant configuration of the SRAP, and sends a radio resource control resume complete (RRC resume complete) message and/or the radio resource control re-establishment complete (RRC re-establishment complete) message.
  • the first transceiver unit uses the default SRAP configuration of SRBO and/or the side link wireless Link Control Bearer Configuration 0 (SL-RLC0) receives the radio resource control resume (RRC resume) message and/or the radio resource control re-establishment (RRC re-establishment) message.
  • SL-RLC0 side link wireless Link Control Bearer Configuration 0
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first transceiver unit 701 uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 to send the radio resource control on the PC5 interface between the first terminal equipment (remote UE) and the second terminal equipment (relay UE).
  • the first transceiver unit 701 is further configured to: use the default SRAP configuration and/or SL- RLC0 is configured by default to receive radio resource control reconfiguration (RRC reconfiguration) messages.
  • RRC reconfiguration radio resource control reconfiguration
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first transceiver unit 701 applies the relevant configuration of the SRAP, and the first transceiver unit 701 transmits the radio resource control restart on the PC5 interface between the first terminal equipment (remote UE) and the second terminal equipment (relay UE) Complete (RRC resume complete) message and/or radio resource control re-establishment complete (RRC re-establishment complete) message.
  • the embodiment of the fourth aspect provides a device for sending and receiving information.
  • a device for sending and receiving information Applied to the second terminal equipment, for example, relay UE 102 in FIG. 1 .
  • the function of the device for sending and receiving information corresponds to the method for relaying UE in the embodiment of the first aspect.
  • Fig. 8 is a schematic diagram of the device for sending and receiving information according to the embodiment of the fourth aspect.
  • the device 800 for sending and receiving information includes a second transceiver unit 801, and the second transceiver unit 801 is configured to:
  • the second transceiver unit 801 establishes a PC5 connection with the first terminal equipment (remote UE);
  • the second transceiver unit 801 sends a radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message, and a radio resource control reconfiguration (RRC reconfiguration) message to the first terminal device (remote UE) through default configuration.
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration radio resource control reconfiguration
  • the default configuration includes a default sidelink RLC bearer configuration (sidelink RLC bearer configuration) and/or a default sidelink relay adaptation protocol (SRAP) related configuration.
  • sidelink RLC bearer configuration sidelink RLC bearer configuration
  • SRAP sidelink relay adaptation protocol
  • the default side link radio link control bearer configuration is a side link radio link control 0 (SL-RLC0) default configuration or a side link radio link control 1 (SL-RLC1) default configuration.
  • the default SRAP-related configuration includes at least one of the following: a local or temporary identifier of the first terminal device (remote UE), an added mapping list, and a deleted mapping list.
  • the default SRAP-related configuration includes the default SRAP configuration of Signaling Radio Bearer 0 (SRB0) and/or the default SRAP configuration of Signaling Radio Bearer 1 (SRB1).
  • the second transceiver unit 801 uses the side link radio link control bearer configuration 1 (SL-RLC1) to send Signaling Radio Bearer 1 (SRB1) message.
  • the SRB1 message carries a radio resource control resume (RRC resume) message and/or a radio resource control re-establishment (RRC re-establishment) message, or, the SRB1 message is a message sent by the first terminal equipment (remote UE) The first SRB1 message sent by the second terminal device (relay UE) to the first terminal device after the radio bearer 0 (SRB0) message is sent to the network device.
  • RRC resume radio resource control resume
  • RRC re-establishment radio resource control re-establishment
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the second transceiver unit 801 uses the default SRAP configuration of SRB1 and/or the default configuration of SL-RLC1 on the PC5 interface between the second terminal equipment (relay UE) and the first terminal equipment (remote UE) to receive the first A radio resource control resume complete (RRC resume complete) message and/or the radio resource control re-establishment complete (RRC re-establishment complete) message sent by a terminal device.
  • RRC resume complete radio resource control resume complete
  • RRC re-establishment complete radio resource control re-establishment complete
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the side link relay adaptation protocol (SRAP).
  • the second transceiver unit 801 may receive a radio resource control resume complete (RRC resume complete) message and/or the radio resource control re-establishment complete (RRC re-establishment complete) message sent by the first terminal device based on the relevant configuration of SRAP. information.
  • the second transceiver unit 801 uses the default SRAP configuration of SRBO and/or the default configuration of SL-RLC0 to send the The radio resource control resume (RRC resume) message and/or the radio resource control re-establishment (RRC re-establishment) message.
  • RRC resume The radio resource control resume
  • RRC re-establishment The radio resource control re-establishment
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the second transceiver unit 801 uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 to receive radio resource control on the PC5 interface between the second terminal equipment (relay UE) and the first terminal equipment (remote UE).
  • the second transceiver unit is further configured to use the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 to send wireless Resource Control Reconfiguration (RRC reconfiguration) message.
  • RRC reconfiguration wireless Resource Control Reconfiguration
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the second transceiver unit 801 receives a radio resource control resume complete (RRC resume complete) message and/or radio resource control reestablishment at the PC5 interface between the second terminal equipment (relay UE) and the first terminal equipment (remote UE) Complete (RRC re-establishment complete) message.
  • RRC resume complete radio resource control resume complete
  • remote UE radio resource control reestablishment complete
  • the embodiment of the fifth aspect provides a device for sending and receiving information.
  • a device for sending and receiving information Applied to the first terminal equipment, for example, remote UE 101 in FIG. 1 .
  • the function of the device for sending and receiving information corresponds to the method for remote UE in the embodiment of the first aspect.
  • Fig. 9 is a schematic diagram of the device for sending and receiving information according to the embodiment of the fifth aspect.
  • the device 900 for sending and receiving information includes a third transceiver unit 901, and the third transceiver unit 901 is configured to:
  • the third transceiver unit 901 establishes a PC5 connection with the second terminal equipment (relay UE);
  • the third transceiver unit 901 receives a radio resource control setup (RRC setup) message, a radio resource control restart (RRC resume) message, and a radio resource control re-establishment (RRC re-establishment) message via the second terminal device (relay UE).
  • RRC setup radio resource control setup
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • SRAP Sidelink Relay Adaptation Protocol
  • the third transceiver unit 801 After the third transceiver unit 801 receives the relevant configuration of SRAP in the RRC setup message, it makes the first terminal equipment (remote UE) perform at least one of the following operations:
  • Radio resource control setup complete Send a radio resource control setup complete (RRC setup complete) message based on the relevant configuration of SRAP.
  • the third transceiver unit 901 can also have the function of the first transceiver unit 701, that is, the function of the first transceiver unit 701 can be integrated into the third transceiver unit 901, so that the third transceiver unit 901 also has the first transceiver unit 901. Function of unit 701 .
  • the embodiment of the sixth aspect provides a device for sending and receiving information.
  • Applied to the second terminal equipment for example, relay UE 102 in FIG. 1 .
  • the function of the apparatus for sending and receiving information corresponds to the method of the second terminal device in the embodiment of the first aspect.
  • Fig. 10 is a schematic diagram of the device for sending and receiving information according to the embodiment of the sixth aspect.
  • the device 1000 for sending and receiving information includes a fourth transceiver unit 1001, and the fourth transceiver unit 1001 is configured to:
  • the fourth transceiver unit 1001 establishes a PC5 connection with the first terminal equipment (remote UE);
  • the fourth transceiver unit 1001 sends at least one of a radio resource control establishment (RRC setup) message, a radio resource control restart (RRC resume) message and a radio resource control re-establishment (RRC re-establishment) message to the first terminal device (remote UE).
  • RRC setup radio resource control establishment
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • SRAP Sidelink Relay Adaptation Protocol
  • the fourth transceiver unit 1001 forwards the radio resource control resume (RRC resume) message, the radio resource control re-establishment (RRC re-establishment) message and the radio resource control reconfiguration (RRC reconfiguration) message sent by the network device to the first terminal device information.
  • RRC resume radio resource control resume
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration radio resource control reconfiguration
  • the fourth transceiving unit 1001 is further configured to: receive a radio resource control setup complete (RRC setup complete) message from the first terminal device based on SRAP related configuration.
  • RRC setup complete radio resource control setup complete
  • the fourth transceiver unit 1001 can also have the function of the second transceiver unit 801, that is, the function of the second transceiver unit 801 can be integrated into the fourth transceiver unit 1001, so that the fourth transceiver unit 1001 also has the second transceiver unit 801. Function of unit 801.
  • the embodiment of the seventh aspect provides a device for sending and receiving information. Applied to a network device, for example, the network device 100 in FIG. 1 .
  • the function of the apparatus for sending and receiving information corresponds to the method of the network device in the embodiment of the first aspect.
  • Fig. 11 is a schematic diagram of the device for sending and receiving information according to the embodiment of the seventh aspect.
  • the device 1100 for sending and receiving information includes a fifth transceiver unit 1101, and the fifth transceiver unit 1101 is configured to:
  • RRC setup radio resource control setup
  • RRC resume radio resource control restart
  • RRC re-establishment RRC re- establishment
  • Embodiments of the eighth aspect provide a device for sending and receiving information. Applied to the first terminal equipment, for example, remote UE 101 in FIG. 1 . The function of the device for sending and receiving information corresponds to the remote UE method in the embodiment of the second aspect.
  • Fig. 12 is a schematic diagram of the device for sending and receiving information according to the embodiment of the eighth aspect.
  • the device 1200 for sending and receiving information includes a sixth transceiver unit 1201, and the sixth transceiver unit 1201 is configured to:
  • SRAP Relay Adaptation Protocol
  • PC5 SRAP or SL SRAP Relay Adaptation Protocol
  • the first terminal equipment selects or reselects a second terminal equipment (relay UE);
  • the first terminal device (remote UE) initiates the RRC connection establishment process and/or the RRC reestablishment process and/or the RRC resume process via the second terminal device (relay UE);
  • the first terminal equipment sends RRC setup request and/or RRC re-establishment request and/or RRC resume request via the second terminal equipment (relay UE);
  • the first terminal equipment receives RRC setup and/or RRC re-establishment and/or RRC resume and/or RRC reconfiguration messages via the second terminal equipment (relay UE);
  • the first terminal device receives the RRC reconfiguration message from the path switch to the second terminal device (relay UE) (direct-to-indirect path switch) from the gNB,
  • SRAP PC5 SRAP or SL SRAP
  • the first terminal equipment uses the relevant configuration of default SRAP;
  • the first terminal device receives RRC setup and/or RRC re-establishment and/or RRC resume and/or RRC reconfiguration messages including SRAP related configurations,
  • the release of the SRAP (PC5 SRAP or SL SRAP) entity is performed during at least one of the following procedures:
  • the first terminal device switches from communicating with the gNB via the relay to directly communicating with the gNB (indirect-to-direct path switch);
  • the PC5 connection (such as PC5-RRC connection or PC5 unicast link) between the first terminal equipment (remote UE) and the second terminal equipment (relay UE) is released;
  • the first terminal device enters a RRC idle (RRC_Idle) or RRC deactivated (RRC_Inactive) state.
  • the embodiment of the ninth aspect provides a device for sending and receiving information.
  • a device for sending and receiving information Applied to the second terminal equipment, for example, relay UE 102 in FIG. 1 .
  • the function of the device for sending and receiving information corresponds to the method for relaying UE in the embodiment of the second aspect.
  • Fig. 13 is a schematic diagram of the device for sending and receiving information according to the embodiment of the ninth aspect.
  • the device 1300 for sending and receiving information includes a seventh transceiver unit 1301, and the seventh transceiver unit 1301 is configured to:
  • SRAP PC5 SRAP or SL SRAP
  • the configuration, reconfiguration or modification of PC5 SRAP or SL SRAP entities is performed under the following conditions:
  • the release of the PC5 SRAP or SL SRAP entity is performed during at least one of the following procedures:
  • the first terminal device switches from communicating with the network device via the second terminal device to directly communicating with the network device (indirect-to-direct path switch);
  • the PC5 connection (such as PC5-RRC connection or PC5 unicast link) between the first terminal equipment (remote UE) and the second terminal equipment (relay UE) is released;
  • the establishment of the Uu SRAP entity is performed during at least one of the following procedures:
  • the release of the Uu SRAP entity is performed under the following conditions:
  • the second terminal equipment no longer has a PC5 connection with a first terminal equipment (remote UE).
  • the embodiment of the present application also provides a communication system.
  • the communication system may include a first terminal device, a second terminal device, and a network device.
  • the first terminal device may be the remote UE 101 in FIG. 1
  • the second terminal device may be The relay UE 102 in FIG. 1
  • the network device may be the network device 100 in FIG. 1.
  • the first terminal device and the second terminal device may adopt a similar terminal device structure.
  • Fig. 14 is a schematic diagram of a terminal device in a communication system according to an embodiment of the tenth aspect.
  • the terminal device shown in FIG. 14 can be used for the first terminal device, and can also be used for the second terminal device.
  • a terminal device 1400 may include: a processor 1410 (such as a central processing unit CPU) and a memory 1420 ; the memory 1420 is coupled to the processor 1410 .
  • the memory 1420 can store various data; in addition, it also stores a program 1430 for information processing, and executes the program 1430 under the control of the processor 1410 .
  • the processor 1410 may be configured to execute a program to implement the method described in the first aspect or the second aspect.
  • the terminal device 1400 may further include: a transceiver 1440 and an antenna 1450 ; wherein, the functions of the above components are similar to those of the prior art, and will not be repeated here. It should be noted that the terminal device 1400 does not necessarily include all components shown in FIG. 14 ; in addition, the terminal device 1400 may also include components not shown in FIG. 14 , and reference may be made to the prior art.
  • Fig. 15 is a schematic diagram of network devices in the communication system of the embodiment of the tenth aspect.
  • a network device 1500 may include: a processor 1510 (such as a central processing unit CPU) and a memory 1520 ; the memory 1520 is coupled to the processor 1510 .
  • the memory 1520 can store various data; in addition, it also stores a program 1530 for information processing, and executes the program 1530 under the control of the processor 1510 .
  • the processor 1510 may be configured to execute a program to implement the method described in the first aspect or the second aspect.
  • the network device 1500 may further include: a transceiver 1540 and an antenna 1550 ; wherein, the functions of the above components are similar to those of the prior art, and will not be repeated here. It should be noted that the network device 1500 does not necessarily include all the components shown in FIG. 15 ; in addition, the network device 1500 may also include components not shown in FIG. 15 , and reference may be made to the prior art.
  • the embodiment of the present application also provides a computer program, wherein when the program is executed in the first terminal device or the second terminal device, the program causes the first terminal device or the second terminal device to execute the first and second terminal devices.
  • the embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program causes the first terminal device or the second terminal device to execute the methods described in the first and second aspects.
  • An embodiment of the present application further provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the methods described in the embodiments of the first aspect and the second aspect.
  • the embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program causes the network device to execute the methods described in the first and second embodiments.
  • the above devices and methods in this application can be implemented by hardware, or by combining hardware and software.
  • the present application relates to a computer-readable program that, when executed by a logic component, enables the logic component to realize the above-mentioned device or constituent component, or enables the logic component to realize the above-mentioned various methods or steps.
  • the present application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and the like.
  • the method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of both.
  • one or more of the functional block diagrams shown in the figure and/or one or more combinations of the functional block diagrams may correspond to each software module or each hardware module of the computer program flow.
  • These software modules may respectively correspond to the steps shown in the figure.
  • These hardware modules for example, can be realized by solidifying these software modules by using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium, or it can be an integral part of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or large-capacity flash memory device.
  • One or more of the functional blocks described in the accompanying drawings and/or one or more combinations of the functional blocks can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof.
  • DSP digital signal processor
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors processor, one or more microprocessors in communication with a DSP, or any other such configuration.
  • the first terminal equipment (remote UE) establishes a PC5 connection with the second terminal equipment (relay UE);
  • the first terminal device receives a radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message, and a radio resource control message through a default configuration via the second terminal device (relay UE). At least one of control reconfiguration (RRC reconfiguration) messages.
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration At least one of control reconfiguration (RRC reconfiguration) messages.
  • the default configuration includes default sidelink radio link control bearer configuration (sidelink RLC bearer configuration) and/or default sidelink relay adaptation protocol (SRAP) related configuration.
  • sidelink RLC bearer configuration sidelink RLC bearer configuration
  • SRAP sidelink relay adaptation protocol
  • the default side link radio link control bearer configuration is a side link radio link control 0 (SL-RLC0) default configuration or a side link radio link control 1 (SL-RLC1) default configuration.
  • the default SRAP-related configuration includes at least one of the following: a local or temporary identifier of the first terminal device (remote UE), an added mapping list, and a deleted mapping list.
  • the default SRAP-related configuration includes a default SRAP configuration for Signaling Radio Bearer 0 (SRB0) and/or a default SRAP configuration for Signaling Radio Bearer 1 (SRB1).
  • the first terminal device uses the default SRAP configuration of SRB1 and/or the default configuration of SL-RLC1 to receive the Signaling Radio Bearer 1 (SRB1) message on the PC5 interface with the second terminal device (relay UE).
  • SRB1 Signaling Radio Bearer 1
  • the SRB1 message carries the radio resource control resume (RRC resume) message and/or the radio resource control re-establishment (RRC re-establishment) message, or, the SRB1 message is in the first terminal device (remote After the signaling radio bearer 0 (SRB0) message of UE) is sent to the network device, the first SRB1 message to be received by the first terminal device (remote UE).
  • RRC resume radio resource control resume
  • RRC re-establishment radio resource control re-establishment
  • the first terminal device sends a radio resource control re-establishment request (RRC re-establishment request) message or a radio resource control restart (RRC resume request) message, or the first terminal device (remote UE)
  • RRC re-establishment request radio resource control re-establishment request
  • RRC resume request radio resource control restart
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first terminal device uses the default SRAP configuration of SRB1 and/or the default configuration of SL-RLC1 on the PC5 interface with the second terminal device (relay UE) to send a radio resource control resume complete (RRC resume complete ) message and/or the radio resource control re-establishment complete (RRC re-establishment complete) message.
  • RRC resume complete radio resource control resume complete
  • RRC re-establishment complete radio resource control re-establishment complete
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first terminal device applies the relevant configuration of the SRAP, and sends a radio resource control resume complete (RRC resume complete) message and/or the radio resource control re-establishment complete (RRC re-establishment complete) message.
  • RRC resume complete radio resource control resume complete
  • RRC re-establishment complete radio resource control re-establishment complete
  • the first terminal device uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 on the PC5 interface with the second terminal device (relay UE) to receive the RRC resume ) message and/or the radio resource control re-establishment (RRC re-establishment) message.
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first terminal device uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 on the PC5 interface with the second terminal device (relay UE) to send a radio resource control resume complete (RRC resume complete ) message and/or RRC re-establishment complete (RRC re-establishment complete) message.
  • RRC resume complete radio resource control resume complete
  • RRC re-establishment complete RRC re-establishment complete
  • the first terminal equipment uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 on the PC5 interface with the second terminal equipment (relay UE) to receive a radio resource control reconfiguration (RRC reconfiguration) message .
  • RRC reconfiguration radio resource control reconfiguration
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the first terminal device applies the relevant configuration of the SRAP, and the first terminal device (remote UE) sends a radio resource control restart on the PC5 interface with the second terminal device (relay UE) Complete (RRC resume complete) message and/or radio resource control re-establishment complete (RRC re-establishment complete) message.
  • the second terminal equipment (relay UE) establishes a PC5 connection with the first terminal equipment (remote UE);
  • the second terminal device sends a radio resource control restart (RRC resume) message, a radio resource control re-establishment (RRC re-establishment) message, and a radio resource At least one of control reconfiguration (RRC reconfiguration) messages.
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • RRC reconfiguration radio resource At least one of control reconfiguration
  • the default configuration includes default sidelink radio link control bearer configuration (sidelink RLC bearer configuration) and/or default sidelink relay adaptation protocol (SRAP) related configuration.
  • sidelink RLC bearer configuration sidelink RLC bearer configuration
  • SRAP sidelink relay adaptation protocol
  • the default side link radio link control bearer configuration is a side link radio link control 0 (SL-RLC0) default configuration or a side link radio link control 1 (SL-RLC1) default configuration.
  • the default SRAP-related configuration includes at least one of the following: a local/temporary identifier of the first terminal device (remote UE), an added mapping list, and a deleted mapping list.
  • the default SRAP-related configuration includes a default SRAP configuration for Signaling Radio Bearer 0 (SRB0) and/or a default SRAP configuration for Signaling Radio Bearer 1 (SRB1).
  • the radio resource control resume (RRC resume) message
  • the radio resource control re-establishment (RRC re-establishment) message
  • the radio resource control reconfiguration ( RRC reconfiguration) message.
  • the second terminal equipment uses the default SRAP configuration of SRB1 and/or the default configuration of SL-RLC1 to send a Signaling Radio Bearer 1 (SRB1) message on the PC5 interface with the first terminal equipment (remote UE),
  • SRB1 Signaling Radio Bearer 1
  • the SRB1 message carries the radio resource control resume (RRC resume) message and/or the radio resource control re-establishment (RRC re-establishment) message, or, the SRB1 message is in the first terminal device (remote After the UE) sends a Signaling Radio Bearer 0 (SRB0) message to the network device, the second terminal device (relay UE) sends the first SRB1 message to the first terminal device.
  • RRC resume radio resource control resume
  • RRC re-establishment radio resource control re-establishment
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the second terminal device uses the default SRAP configuration of SRB1 and/or the default configuration of SL-RLC1 on the PC5 interface with the first terminal device (remote UE) to receive the radio resource sent by the first terminal device A control resume complete (RRC resume complete) message and/or the radio resource control re-establishment complete (RRC re-establishment complete) message.
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the second terminal device receives a radio resource control resume complete (RRC resume complete) message sent by the first terminal device and/or the radio resource control reestablishment complete ( RRC re-establishment complete) message.
  • RRC resume complete radio resource control resume complete
  • RRC re-establishment complete radio resource control reestablishment complete
  • the second terminal equipment uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 to send the radio resource control restart (RRC resume ) message and/or the radio resource control re-establishment (RRC re-establishment) message.
  • RRC resume radio resource control restart
  • RRC re-establishment radio resource control re-establishment
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message does not include the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the second terminal equipment uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 on the PC5 interface with the first terminal equipment (remote UE) to receive a radio resource control resume complete (RRC resume complete ) message and/or RRC re-establishment complete (RRC re-establishment complete) message.
  • RRC resume complete radio resource control resume complete
  • RRC re-establishment complete RRC re-establishment complete
  • the second terminal equipment uses the default SRAP configuration of SRB0 and/or the default configuration of SL-RLC0 to send a radio resource control reconfiguration (RRC reconfiguration) message on the PC5 interface with the first terminal equipment (remote UE) .
  • RRC reconfiguration radio resource control reconfiguration
  • the radio resource control resume (RRC resume) message or the radio resource control re-establishment (RRC re-establishment) message includes the relevant configuration of the side link relay adaptation protocol (SRAP).
  • SRAP side link relay adaptation protocol
  • the second terminal equipment receives a radio resource control resume complete (RRC resume complete) message and/or a radio resource control reestablishment complete (RRC re- establishment complete) message.
  • RRC resume complete radio resource control resume complete
  • RRC re- establishment complete radio resource control reestablishment complete
  • the first terminal equipment (remote UE) establishes a PC5 connection with the second terminal equipment (relay UE);
  • the first terminal equipment receives a radio resource control setup (RRC setup) message, a radio resource control restart (RRC resume) message, and a radio resource control reestablishment (RRC reestablishment) message via the second terminal equipment (relay UE). -establishment) message,
  • RRC setup radio resource control setup
  • RRC resume radio resource control restart
  • RRC reestablishment radio resource control reestablishment
  • At least one of the RRC setup message, the RRC resume message and the RRC re-establishment message includes the relevant configuration of the Sidelink Relay Adaptation Protocol (SRAP).
  • SRAP Sidelink Relay Adaptation Protocol
  • the first terminal equipment receives the relevant configuration of SRAP in the RRC setup message, perform at least one of the following operations:
  • Radio resource control setup complete Send a radio resource control setup complete (RRC setup complete) message based on the relevant configuration of SRAP.
  • the second terminal equipment (relay UE) establishes a PC5 connection with the first terminal equipment (remote UE);
  • the second terminal equipment sends a radio resource control setup (RRC setup) message, a radio resource control restart (RRC resume) message, and a radio resource control reestablishment (RRC reestablishment) message to the first terminal equipment (remote UE). -establishment) message,
  • At least one of the RRC setup message, the RRC resume message and the RRC re-establishment message includes the relevant configuration of the Sidelink Relay Adaptation Protocol (SRAP).
  • SRAP Sidelink Relay Adaptation Protocol
  • the radio resource control resume (RRC resume) message
  • the radio resource control re-establishment (RRC re-establishment) message
  • the radio resource control reconfiguration ( RRC reconfiguration) message.
  • the second terminal device receives a radio resource control setup complete (RRC setup complete) message from the first terminal device based on the relevant configuration of SRAP.
  • RRC setup complete radio resource control setup complete
  • a method for sending and receiving information, applied to a network device comprising:
  • the network device sends a radio resource control setup (RRC setup) message, a radio resource control resume (RRC resume) message, and a radio resource control reestablishment (RRC UE) message for the first terminal device (remote UE) to the second terminal device (relay UE). at least one of the re-establishment) messages,
  • RRC setup radio resource control setup
  • RRC resume radio resource control resume
  • RRC UE radio resource control reestablishment
  • At least one of the RRC setup message, the RRC resume message and the RRC re-establishment message includes the relevant configuration of the Sidelink Relay Adaptation Protocol (SRAP).
  • SRAP Sidelink Relay Adaptation Protocol
  • SRAP Relay Adaptation Protocol
  • PC5 SRAP or SL SRAP Relay Adaptation Protocol
  • the first terminal equipment selects or reselects a second terminal equipment (relay UE);
  • the first terminal device (remote UE) initiates the RRC connection establishment process and/or the RRC reestablishment process and/or the RRC resume process via the second terminal device (relay UE);
  • the first terminal equipment sends RRC setup request and/or RRC re-establishment request and/or RRC resume request via the second terminal equipment (relay UE);
  • the first terminal equipment receives RRC setup and/or RRC re-establishment and/or RRC resume and/or RRC reconfiguration messages via the second terminal equipment (relay UE);
  • the first terminal device receives the RRC reconfiguration message from the path switch to the second terminal device (relay UE) (direct-to-indirect path switch) from the gNB;
  • SRAP PC5 SRAP or SL SRAP
  • the first terminal equipment uses the relevant configuration of default SRAP;
  • the first terminal device receives RRC setup and/or RRC re-establishment and/or RRC resume and/or RRC reconfiguration messages including SRAP related configurations,
  • the release of the SRAP (PC5 SRAP or SL SRAP) entity is performed during at least one of the following procedures:
  • the first terminal device switches from communicating with the gNB via the relay to directly communicating with the gNB (indirect-to-direct path switch);
  • the PC5 connection (such as PC5-RRC connection or PC5 unicast link) between the first terminal equipment (remote UE) and the second terminal equipment (relay UE) is released;
  • the first terminal device enters a RRC idle (RRC_Idle) or RRC deactivated (RRC_Inactive) state.
  • SRAP PC5 SRAP or SL SRAP
  • the configuration, reconfiguration or modification of PC5 SRAP or SL SRAP entities is performed under the following conditions:
  • the release of the PC5 SRAP or SL SRAP entity is performed during at least one of the following procedures:
  • the first terminal device switches from communicating with the network device via the second terminal device to directly communicating with the network device (indirect-to-direct path switch);
  • the PC5 connection (such as PC5-RRC connection or PC5 unicast link) between the first terminal equipment (remote UE) and the second terminal equipment (relay UE) is released;
  • the establishment of the Uu SRAP entity is carried out in at least one of the following procedures:
  • the release of the Uu SRAP entity is performed under the following conditions:
  • the second terminal equipment no longer has a PC5 connection with a first terminal equipment (remote UE).

Abstract

本申请实施例提供一种收发信号的装置，应用于第一终端设备(remote UE)，所述装置包括第一收发单元，所述第一收发单元被配置为：与第二终端设备(relay UE)建立PC5连接；以及所述第一收发单元经由所述第二终端设备(relay UE)通过默认配置接收无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者。

Description

收发信息的方法、装置和通信系统 技术领域
本申请实施例涉及通信技术领域。
背景技术
5G版本17(Release 17，R17)中正在研究边链路中继(Sidelink relay，SL relay)技术，其包含终端设备(例如，UE)到网络设备中继(UE-to-Network Relay)的场景。其中，在中继的终端设备(relay UE)的Uu接口上使用新空口(NR)Uu链路，在远端的终端设备(remote UE)和relay UE之间的PC5接口上假设使用NR sidelink链路。在UE-to-Network Relay的场景下，relay UE又被称为UE-to-Network relay UE。
图1是终端设备到网络设备中继的场景的一个示意图。
如图1的场景1所示，remote UE 101在网络设备100的覆盖范围之外(out of coverage，OOC)，relay UE 102在网络设备100的覆盖范围之内(in coverage，IC)。
如图1的场景2所示，remote UE 101在网络设备100的覆盖范围之内(in coverage，IC)，relay UE 102在网络设备100的覆盖范围之内(in coverage，IC)。
如图1的场景3所示，remote UE 101在网络设备100a的覆盖范围之内(in coverage，IC)，relay UE 102在网络设备100的覆盖范围之内(in coverage，IC)，网络设备100a不同于网络设备100。
在版本17的层2边链路中继(R17 L2 SL relay)的协议栈中，边链路中继适应协议(SRAP，Sidelink Relay Adaptation Protocol)被引入。对于UE-to-Network relay，在PC5接口和在Uu接口，对控制面和用户面协议栈，SRAP子层(sublayer)都位于无线链路控制(RLC)子层之上。Uu服务数据适应协议(SDAP)、分组数据汇聚协议(PDCP)和无线资源控制(RRC)终止在remote UE和网络设备(例如，gNB)之间，而SRAP、RLC、介质访问控制(MAC)和物理(PHY)层终止在每个链路(即remote UE和relay UE之间的链路以及relay UE和gNB之间的链路)。
图2是UE-to-Network relay的控制面协议栈的一个示意图。
对于UE-to-Network relay，PC5接口上的SRAP子层只用于承载映射(bearer mapping)目的。对remote UE在广播控制信(BCCH)和寻呼控制信道(PCCH)上 的消息的中继，SRAP子层在PC5跳(hop)不出现。对remote UE的信令无线承载0(SRB0)上的消息，SRAP子层在PC5 hop上不出现，但SRAP子层在对下行链路(DL)和上行链路(UL)的Uu hop出现。
对L2 UE-to-Network relay，在上行：
-Uu SRAP子层支持入口(ingress)用于中继的PC5无线链路控制信道(PC5 RLC channels)和出口(egress)Relay UE Uu接口上的Uu RLC channel之间的上行承载映射。
-Uu SRAP子层支持对上行业务的remote UE识别。在上行，Remote UE的Uu无线承载(Uu Radio bearer)的标识信息和一个本地的remote UE ID被包括在Uu SRAP头中，以便让gNB将收到的对特定PDCP实体的数据包与remote UE的正确Uu radio barer关联。
-Relay UE的PC5 SRAP子层支持remote UE的Uu无线承载和egress Uu RLC channel之间的上行(UL)承载映射。
-Remote UE的PC5 SRAP子层支持remote UE的Uu无线承载和egress PC5 RLC channel之间的UL承载映射。
对L2 UE-to-Network relay，在下行：
-gNB侧的Uu SRAP子层支持DL承载映射，将remote UE的端到端无线承载(例如，SRB和/或DRB)映射到relay UE的Uu接口上的Uu RLC channel。
-Uu SRAP子层支持对下行业务的remote UE识别。在下行，Remote UE的Uu无线承载的标识信息和一个本地的remote UE ID被gNB放到Uu SRAP头中，以便让relay UE将从remote UE的Uu radio bearer收到的数据包映射到它相关的PC5 RLC channel。
-Relay UE的PC5 SRAP子层支持remote UE的Uu无线承载和egress PC5 RLC channel之间的下行承载映射。
应该注意，上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
在UE-to-Network relay中，Remote UE可以通过relay UE接入网络设备，从而经由relay UE与网络设备进行通信。图3是Remote UE通过relay UE接入网络设备时RRC连接(RRC connection)建立过程的一个示意图，RRC连接重建(re-establishment)和RRC重新开始(resume)过程与此类似。
如图3所示，该RRC连接建立过程包括如下操作：
过程描述如下：
1.Remote UE和Relay UE执行发现(discovery)过程，并使用NR V2X中的过程建立PC5-RRC connection。
2.Remote UE发送第一条RRC消息(例如，RRCSetupRequest)用于该remote UE和gNB之间通过relay UE的连接建立，使用规定的PC5 RLC承载(PC5 RLC bearer)配置。如果Relay UE没有处于RRC连接模式(RRC_CONNECTED)，那么，该relay UE需要在该规定的PC5 RLC bearer上收到消息时，进行自己的连接建立。gNB响应RRCSetup message给Remote UE。到Remote UE的这条RRCSetup的传递使用规定的PC5 RLC bearer配置。
3.gNB和Relay UE执行Uu接口上的中继信道建立过程。根据gNB的配置，Relay UE和remote UE建立RLC信道用于中继PC5接口上到remote UE的SRB1。
4.Remote UE使用PC5上的SRB1的中继信道以及配置给relay UE的Uu上的SRB1中继信道，向gNB发送RRCSetupComplete message。之后，Remote UE在Uu接口上具有RRC连接。
5.Remote UE和gNB遵循Uu接口的过程建立安全，安全消息通过relay UE被转发。
6.gNB经由relay UE发送RRC重配置消息(RRCReconfiguration message)给Remote UE，以建立用于中继的SRB2/DRBs。Remote UE经由relay UE发送RRC重配置完成消息(RRCReconfigurationComplete message)给gNB作为响应。此外，gNB建立gNB和relay UE之间额外的RLC承载或信道(bearer or channel)，用于中继业务。
对于图3的过程而言，SRAP的相关配置被包括在RRC Reconfiguration消息中(对应于图3的操作6)；对SRB0而言，在PC5接口上SRAP不出现，而对其他SRB(例如，SRB1或SRB2)和DRB，PC5接口默认出现SRAP，即使用SRAP的承载映射 功能。
本申请的发明人发现：在图3所示的过程中，RRC建立完成(RRC setup complete)消息使用SRB1发送，按照现有技术，需要在PC5使用SRAP功能；此外，在RRC re-establishment和RRC resume过程中，RRC re-establishment消息、RRC re-establishment complete消息、RRC resume消息和RRC resume complete消息都使用SRB1发送，由于这些SRB1消息在RRC reconfiguration过程之前传输，而此时remote UE还未接收到PC5 SRAP的配置，因此不清楚如何在PC5接口使用SRAP来传输这些SRB1上的消息。
针对上述问题的至少之一，本申请实施例提供一种收发信息的方法、装置和通信系统。在该收发信息的方法中，第一终端设备(例如，remote UE)与第二终端设备(例如，relay UE)建立PC5连接，并且第一终端设备(remote UE)经由第二终端设备(relay UE)通过默认配置接收无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者；和/或，第一终端设备(例如，remote UE)与第二终端设备(例如，relay UE)建立PC5连接，并且第一终端设备经由第二终端设备接收的无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。由此，使得remote UE和relay UE采用正确的配置发送和/或接收相关的RRC消息，防止remote UE和relay UE由于配置不一致而引起的消息传输失败，有助于remote UE经由relay UE与网络设备进行连接或恢复连接，保证了remote UE的业务质量和用户体验。
根据本申请实施例的一个方面，提供一种收发信息的装置，应用于第一终端设备(remote UE)，所述装置包括第一收发单元，所述第一收发单元被配置为：
与第二终端设备(relay UE)建立PC5连接；以及
所述第一收发单元经由所述第二终端设备(relay UE)通过默认配置接收无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者。
根据本申请实施例的另一个方面，提供一种收发信息的装置，应用于第二终端设备(relay UE)，所述装置包括第二收发单元，所述第二收发单元被配置为：
所述第二收发单元与第一终端设备(remote UE)建立PC5连接；以及
所述第二收发单元通过默认配置向所述第一终端设备(remote UE)发送无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者。
根据本申请实施例的另一个方面，提供一种收发信息的装置，应用于第一终端设备(remote UE)，所述装置包括第三收发单元，所述第三收发单元被配置为：
所述第三收发单元与第二终端设备(relay UE)建立PC5连接；以及
所述第三收发单元经由所述第二终端设备(relay UE)接收无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
根据本申请实施例的另一个方面，提供一种收发信息的装置，应用于第二终端设备(relay UE)，所述装置包括第四收发单元，所述第四收发单元被配置为：
所述第四收发单元与第一终端设备(remote UE)建立PC5连接；以及
所述第四收发单元向所述第一终端设备(remote UE)发送无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
本申请实施例的有益效果之一在于：使得remote UE和relay UE采用正确的配置发送和/或接收相关的RRC消息，防止remote UE和relay UE由于配置不一致而引起的消息传输失败，有助于remote UE经由relay UE与网络设备进行连接或恢复连接，保证了remote UE的业务质量和用户体验。
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的 特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是终端设备到网络设备中继的场景的一个示意图；
图2是UE-to-Network relay的控制面协议栈的一个示意图；
图3是Remote UE通过relay UE接入网络设备时RRC连接建立过程的一个示意图；
图4是第一方面的实施例的收发信息的方法的一个示意图；
图5是实施方式1对应的建立UE-to-Network relay连接的流程的一个示意图；
图6的a是RRC重建立(RRC re-establishment)过程的流程的一个示意图；
图6的b是RRC重建立(RRC re-establishment)过程的流程的另一个示意图；
图7是第三方面的实施例所述的收发信息的装置的一个示意图；
图8是第四方面的实施例所述的收发信息的装置的一个示意图；
图9是第五方面的实施例所述的收发信息的装置的一个示意图；
图10是第六方面的实施例所述的收发信息的装置的一个示意图；
图11是第七方面的实施例所述的收发信息的装置的一个示意图；
图12是第八方面的实施例所述的收发信息的装置的一个示意图；
图13是第九方面的实施例所述的收发信息的装置的一个示意图；
图14是第八方面的实施例的通信系统中的终端设备的示意图；
图15是第十方面的实施例的通信系统中的网络设备的示意图。
具体实施方式
参照附图，通过下面的说明书，本申请的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本申请的特定实施方式，其表明了其中可以采用本申请的原 则的部分实施方式，应了解的是，本申请不限于所描述的实施方式，相反，本申请包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本申请实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出。
在本申请实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如新无线(NR，New Radio)、长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信系统中设备之间的通信可以根据任意阶段的通信协议进行，例如可以包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及5G、新无线(NR，New Radio)等等，和/或其他目前已知或未来将被开发的通信协议。
在本申请实施例中，术语“网络设备”例如是指通信系统中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备：集成的接入和回传节点(IAB-node)、基站(BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，等等，此外还可包括远端无线头(RRH，Remote Radio Head)、远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例 如femeto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本申请实施例中，术语“用户设备”(UE，User Equipment)或者“终端设备”(TE，Terminal Equipment或Terminal Device)例如是指通过网络设备接入通信网络并接收网络服务的设备。终端设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、中继设备、路由设备、站，等等。
其中，终端设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、路由器、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，终端设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
此外，术语“网络侧”或“网络设备侧”是指网络的一侧，可以是某一基站，也可以包括如上的一个或多个网络设备。术语“用户侧”或“终端侧”或“终端设备侧”是指用户或终端的一侧，可以是某一UE，也可以包括如上的一个或多个终端设备。
在本申请实施例中，高层信令例如可以是无线资源控制(RRC)信令；例如称为RRC消息(RRC message)，例如包括MIB、系统信息(system information)、专用RRC消息；或者称为RRC IE(RRC information element)。高层信令例如还可以是MAC(Medium Access Control)信令；或者称为MAC CE(MAC control element)。但本申请不限于此。
在本申请的各实施例中，第一终端设备可以是图1所示的remote UE 101，第二终端设备可以是图1所示的relay UE 102，网络设备可以是图1所示的网络设备100。
在UE-to-Network relay场景下，第一终端设备可以通过第二终端设备与网络设备通信，即，通信路径为间接路径(indirect path)。
在本申请的各实施例中，第二终端设备(例如，relay UE)向第一终端设备(例如，remote UE)发送消息，其含义是：第二终端设备将自身生成的消息发送给第一终端设备；或者，第二终端设备将从网络设备收到的消息转发给第一终端设备，其中，第二终端设备并不对该消息进行解析，或者第二终端设备不使用该消息对应的协议层对该消息进行解析，或者第二终端设备透明发送该消息等。例如，无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息等，是由第二终端设备转发给第一终端设备。
类似地，第二终端设备(例如，relay UE)向网络设备(例如，gNB)发送消息，其含义是：第二终端设备将自身生成的消息发送给网络设备；或者，第二终端设备将从第一终端设备收到的消息转发给网络设备，其中，第二终端设备并不对该消息进行解析，或者第二终端设备不使用该消息对应的协议层对该消息进行解析，或者第二终端设备透明发送该消息等。例如，无线资源控制重建完成(RRC re-establishment complete)消息和无线资源控制重配置完成(RRC reconfiguration complete)消息等，是由第二终端设备转发给网络设备。
第一方面的实施例
本申请第一方面的实施例提供一种收发信息的方法。
图4是第一方面的实施例的收发信息的方法的一个示意图。如图4所示，收发信息的方法包括：
操作401、第一终端设备与第二终端设备建立PC5连接；
操作402、第一终端设备经由第二终端设备通过默认配置接收无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者，和/或，第一终端设备经由第二终端设备接收的无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
在操作402中，默认配置例如包括默认的边链路无线链路控制承载配置(sidelink RLC bearer configuration)和/或默认的SRAP的相关配置等，该默认配置也可以是规 定的或预定义的配置等。
在一些实施例中，默认的边链路无线链路控制承载配置可以是用于第一终端设备的SRB0消息传输的边链路RLC承载(或边链路RLC信道)使用的默认配置，使用该默认配置的边链路RLC承载被称为SL-RLC0，该默认配置被称为SL-RLC0默认配置。
在一些实施例中，SL-RLC0默认配置可以包括下面至少一种：RLC模式(例如为透明模式TM或确认模式AM)、序列号长度(sn-field Length，例如取值为12)、重组定时器(t-Reassembly)、逻辑信道标识(例如取值为4)、优先级(例如取值为1)、优先的比特速率(例如取值为无穷)和逻辑信道组(例如取值为0)。
在另一些实施例中，默认的边链路无线链路控制承载配置可以是用于第一终端设备的特定SRB1消息传输的边链路RLC承载(或边链路RLC信道)使用的默认配置，该特定SRB1消息可以包括RRC resume、RRC re-establishment和RRC reconfiguration消息中的至少一个，使用该默认配置的边链路RLC承载被称为SL-RLC1，该默认配置被称为SL-RLC1默认配置。
在一些实施例中，SL-RLC1默认配置可以包括下面至少一种：RLC模式(例如为确认模式AM)、RLC序列号长度(sn-field Length，例如取值为12)、重组定时器(t-Reassembly)、逻辑信道标识(例如取值为4)、优先级(例如取值为1)、优先的比特速率(例如取值为无穷)和逻辑信道组(例如取值为0)。
在一些实施例中，默认的SRAP的相关配置可以包括下面至少一种：第一终端设备(remote UE)的本地/临时标识、增加的映射列表和删除的映射列表。其中，增加的映射列表可以包括下面至少一种：remote UE的无线承载标识(RB-Identity)和该无线承载对应的PC5 RLC信道配置信息(或边链路RLC承载配置信息)。
在一些实施例中，默认的SRAP的相关配置包括SRB0默认的SRAP配置和/或SRB1默认的SRAP配置。
在一些实施例中，对SRB0默认的SRAP配置，remote UE的RB-Identity可以取值为0或SRB0，PC5 RLC信道配置信息(或边链路RLC承载配置信息)可以是边链路RLC承载配置索引，例如取值为0，该边链路RLC承载配置索引可以对应边链路RLC配置和/或边链路MAC逻辑信道配置。其中，边链路RLC配置包括RLC模式(例如TM或AM)及其对应的参数，例如，RLC模式为AM模式时，其对应的参 数可以包括边链路序列号长度(例如取值为12)、轮询重传时间(sl-T-PollRetransmit)、轮询PDU(sl-PollPDU)、轮询字节(sl-PollByte)和最大重传门限等中的至少一个；边链路MAC逻辑信道配置可以包括下面至少一个：优先级(例如为1)、优先的比特速率(例如为无穷)、令牌桶尺寸长度(例如为无穷)、是否允许类型1的配置的授权(例如不允许)、是否使能HARQ反馈(例如取值为enabled)、允许的子载波间隔列表(例如允许所有子载波间隔)、最大PUSCH持续时间(例如取值0.25毫秒或0.5毫秒等)、逻辑信道组(例如取值为0)、调度请求标识(例如取值为0等)和是否应用便连路逻辑信道SR延迟定时器(例如不应用该SR延迟定时器)等。上述删除的映射列表可以包括remote UE的无线承载标识(RB-Identity)，例如取值为0或SRB0。
在一些实施例中，对SRB1默认的SRAP配置，remote UE的RB-Identity可以取值为1或SRB1，PC5 RLC信道配置信息(或边链路RLC承载配置信息)可以是边链路RLC承载配置索引，取值可以是1至512之间的整数，例如默认取值为1，该边链路RLC承载配置索引可以对应边链路RLC配置和/或边链路MAC逻辑信道配置。其中，边链路RLC配置包括RLC模式AM及其对应的参数，对应的参数可以包括边链路序列号长度(例如取值为12)、轮询重传时间(sl-T-PollRetransmit)、轮询PDU(sl-PollPDU)、轮询字节(sl-PollByte)和最大重传门限等中的至少一个；边链路MAC逻辑信道配置可以包括下面至少一个：优先级(例如为1)、优先的比特速率(例如为无穷)、令牌桶尺寸长度(例如为无穷)、是否允许类型1的配置的授权(例如不允许)、是否使能HARQ反馈(例如取值为enabled)、允许的子载波间隔列表(例如允许所有子载波间隔)、最大PUSCH持续时间(例如取值0.25毫秒或0.5毫秒等)、逻辑信道组(例如取值为0)、调度请求标识(例如取值为0等)和是否应用便连路逻辑信道SR延迟定时器(例如不应用该SR延迟定时器)等。上述删除的映射列表可以包括remote UE的无线承载标识(RB-Identity)，例如取值为1或SRB1。
例如，第一终端设备在发送无线资源控制重建立请求(RRC re-establishment request)消息或无线资源控制重新开始请求(RRC resume request)消息时，或者第一终端设备在发起无线资源控制重建立过程或无线资源控制重新开始过程时，可以对SRB1使用SRB1默认的SRAP的相关配置和/或使用SL-RLC1默认配置。
根据第一方面的实施例，在RRC连接建立过程中或重建过程中或重新开始(resume)过程中，能够使得第一终端设备(例如，remote UE)和第二终端设备(例 如，relay UE)在PC5接口采用正确的配置发送和/或接收相关的RRC消息，防止remote UE和relay UE由于配置不一致而引起的消息传输失败，有助于remote UE经由relay UE与网络设备重建连接或恢复连接，保证了remote UE的业务质量和用户体验。
下面，结合具体的实施方式，对操作402进行说明。
实施方式1：
在实施方式1中，RRC setup消息(例如，该消息使用SRB0传输)中，包括SRAP的相关配置。其中：
-SRAP的相关配置包括对SRB1的SRAP的相关配置。例如，对SRB1的SRAP的相关配置可以包括下面至少一种：第一终端设备(remote UE)的本地/临时标识和增加的映射列表。其中，增加的映射列表可以包括下面至少一种：remote UE的无线承载标识(RB-Identity)和该无线承载对应的PC5 RLC信道配置信息(或边链路RLC承载配置信息)。例如，remote UE的RB-Identity可以是1或SRB1，PC5 RLC信道配置信息(或边链路RLC承载配置信息)可以是边链路RLC承载配置索引，该边链路RLC承载配置索引可以对应边链路RLC配置和/或边链路MAC逻辑信道配置。其中，边链路RLC配置包括RLC模式AM及其对应的参数，对应的参数可以包括边链路序列号长度、轮询重传时间、轮询PDU、轮询字节和最大重传门限等中的至少一个；边链路MAC逻辑信道配置可以包括下面至少一个：优先级、优先的比特速率、令牌桶尺寸长度、是否允许类型1的配置的授权、是否使能HARQ反馈、允许的子载波间隔列表、最大PUSCH持续时间、逻辑信道组、调度请求标识和是否应用便连路逻辑信道SR延迟定时器等。
-RRC setup request消息(由remote UE经由relay UE发送到gNB)和RRC setup消息(由gNB经由relay UE发送给remote UE)在PC5接口使用SL-RLC0的默认配置传输。
-Remote UE收到RRC setup消息中的SRAP的相关配置后，可以执行下面操作中的至少一个：建立SRAP实体，根据SRAP的相关配置来配置SRAP实体的参数，将RRC setup消息中的UE标识(例如UE-IdentityRemote)应用为该remote UE的小区无线网络临时标识(C-RNTI)，基于SRAP的相关配置(例如，使用配置的SRAP实体的参数)来发送无线资源控制建立完成(RRC setup complete)消息。
图5是实施方式1对应的建立UE-to-Network relay连接的流程的一个示意图。如 图5所示，该流程包括如下操作：
操作1.Remote UE发现relay UE，二者之间建立PC5连接(PC5 connection)。
操作2.Remote UE向relay UE发送RRC建立请求(RRC setup request)消息。
操作3a～操作3b.Relay UE通过边链路用户设备信息(Sidelink UE Information，SUI)消息向gNB报告remote UE的L2 ID，gNB向relay UE发送RRC reconfiguration消息，其中配置relay UE的SRAP配置，其中可以包括Uu接口的SRAP配置和PC5接口的SRAP配置等。
操作4.relay UE向gNB转发在操作2中由remote UE发送的RRC setup request。
操作5.gNB向relay UE发送RRC setup消息，该RRC setup消息中包括对remote UE的SRAP的相关配置。
操作6.relay UE将RRC setup消息转发给remote UE。
操作7.Remote UE进行与SRAP的相关配置对应的操作，例如：建立SRAP实体；和/或，根据SRAP的相关配置来配置SRAP实体的参数；和/或，将RRC setup消息中的UE标识(例如UE-IdentityRemote)应用为该remote UE的小区无线网络临时标识(C-RNTI)等。
操作8.Remote UE基于SRAP的相关配置(例如，使用配置的SRAP实体的参数)来发送无线资源控制建立完成(RRC setup complete)消息。
操作9.Relay UE将Remote UE发送的RRC setup complete消息转发给gNB。
实施方式2：
在实施方式2中，操作402所述的默认的配置例如可以是SRB1默认的SRAP配置和/或SL-RLC1默认配置。对RRC resume消息和/或RRC re-establishment消息，由于这2条消息使用SRB1传输，当relay UE从gNB收到该消息时，在PC5接口使用默认的SRAP的相关配置和/或SL-RLC1默认配置发送给remote UE。
在实施方式2的一个实施例中，relay UE已经被网络设备配置Uu接口的SRAP配置和PC5接口的SRAP配置，当该relay UE在Uu接口收到gNB经由该relay UE发送给remote UE的SRB1消息时，需要确定对该SRB1消息在PC5接口使用默认配置还是使用网络设备配置的PC5接口的SRAP配置发送给remote UE。例如，如果relay UE收到的SRB1消息是在remote UE发送SRB0消息到gNB之后的将要接收的第一 条SRB1消息，或者，如果relay UE收到SRB1承载RRC resume消息或RRC re-establishment消息，则在PC5接口使用默认配置将该消息发送给remote UE，否则，在PC5接口使用网络设备配置的PC5接口的SRAP配置将该消息发送给remote UE。
在实施方式2中，remote UE在发送RRC re-establishment request消息或RRC resume request消息(这2条消息在SRB0发送)时，对SRB1使用默认的SRAP的相关配置和/或SL-RLC1默认配置，以接收gNB使用SRB1发送的RRC resume消息或RRC re-establishment消息。
图6的a是RRC重建立(RRC re-establishment)过程的流程的一个示意图。图6的b是RRC重建立(RRC re-establishment)过程的流程的另一个示意图。此外，RRC resume过程与RRC re-establishment过程类似，即，remote UE经由relay UE发送RRC resume request，接收gNB经由relay UE发送的RRC resume消息，并经由relay UE向gNB发送RRC resume complete消息。
对应于下述的图6的a，在实施方式2的一个实施例中，remote UE向relay UE发送的RRC resume complete消息和/或RRC re-establishment complete消息可以采用默认的SRAP的相关配置和/或SL-RLC1默认配置。
对应于下述的图6的b，在实施方式2的另一个实施例中，在RRC resume消息和/或RRC re-establishment消息中可以包括remote UE的SRAP的相关配置。Remote UE可以应用该SRAP的相关配置，发送RRC resume complete消息和/或RRC re-establishment complete消息。其中SRAP的相关配置可以参考实施方式1中的描述。
下面，对图6的a和图6的b所示的RRC重建立(RRC re-establishment)过程分别进行说明。
如图6的a所述的流程包括如下操作：
操作1.Remote UE和Relay UE执行发现(discovery)过程，并使用NR V2X过程建立PC5-RRC connection。
操作2.Remote UE采用SL-RLC0默认配置向relay UE发送RRC re-establishment request消息(使用SRB0传输)。Remote UE对SRB1使用默认的SRAP的相关配置(例如SRB1默认的SRAP配置)和/或SL-RLC1默认配置。
操作3～操作4.Relay UE通过Sidelink UE Information(SUI)消息向gNB报告remote UE的L2 ID，gNB向relay UE发送RRC reconfiguration消息，其中配置relay UE 的SRAP配置，其中可以包括Uu接口的SRAP配置和PC5接口的SRAP配置等。
操作5.Relay UE使用Uu SRAP配置转发remote UE的RRC re-establishment request消息给gNB。
操作6.gNB经由relay UE向remote UE发送RRC re-establishment消息。Relay UE根据Uu SRAP头中的信息，可以知道收到的消息为remote UE的SRB1的消息。
操作7.Relay UE在PC5接口使用默认的SRAP的相关配置和/或SL-RLC1默认配置，发送该SRB1消息给remote UE。
操作8.Remote UE使用默认的SRAP的相关配置和/或SL-RLC1默认配置，发送RRC re-establishment complete消息给relay UE。
操作9.Relay UE将该RRC re-establishment complete消息转发给gNB。
操作10.gNB经由relay UE发送RRC reconfiguration消息给remote UE，该RRC reconfiguration消息中可以包括remote UE的SRAP的相关配置。该RRC reconfiguration消息可以使用默认的SRAP的相关配置和/或SL-RLC1默认配置发送。
操作11.remote UE应用该RRC reconfiguration消息中包括的remote UE的SRAP的相关配置。
操作12.Remote UE经由relay UE发送RRC reconfiguration complete消息给gNB。
如图6的b所述的流程包括如下操作：
操作1～操作5与图6的a所述的流程中的操作1～操作5相同。
操作6.gNB经由relay UE向remote UE发送RRC re-establishment消息。该RRC re-establishment消息中包括remote UE的SRAP的相关配置。Relay UE根据Uu SRAP头中的信息，可以知道收到的消息为remote UE的SRB1的消息。
操作7.Relay UE在PC5接口使用默认的SRAP的相关配置和/或SL-RLC1默认配置，将收到的该remote UE的SRB1的消息发送该remote UE。
操作8.Remote UE根据RRC re-establishment消息中包括的SRAP的相关配置，进行相应的操作，例如建立SRAP实体，执行该SRAP的相关配置等。
操作9a.Remote UE在PC5接口使用SRAP的相关配置发送RRC re-establishment complete消息。
操作9b.RRC re-establishment complete消息由relay UE通过Uu接口转发到gNB。
实施方式3：
在实施方式3中，操作402所述的默认配置例如可以是SRB0默认的SRAP配置和/或SL-RLC0默认配置。例如，relay UE在PC5接口使用SRB0的默认的SRAP配置和/或SL-RLC0默认配置将RRC resume消息和/或RRC re-establishment消息发送给remote UE。
实施方式3对应的RRC重建立(RRC re-establishment)过程与图6的a、图6的b类似，区别在于：
-在操作7中，Relay UE在PC5接口不使用SRAP(或SRAP不出现等)，而是使用SRB0的默认的SRAP配置和/或SL-RLC0默认配置发送RRC re-establishment消息或RRC resume消息。对应地，Remote UE也不使用SRAP接收RRC re-establishment消息或RRC resume消息，而是使用SRB0的默认的SRAP配置和/或SL-RLC0默认配置接收。
-如果RRC re-establishment消息或RRC resume消息不包括SRAP的配置(类似于图6的a)，那么，在操作8中，remote UE使用SRB0的默认的SRAP配置和/或SL-RLC0默认配置将RRC re-establishment complete消息或RRC resume complete消息发送给relay UE。在操作10中，relay UE可以使用SRB0的默认的SRAP配置和/或SL-RLC0默认配置将RRC reconfiguration消息发送给remote UE。
-如果RRC re-establishment消息或RRC resume消息包括SRAP的配置(类似于图6的b)，那么，在操作8中，remote UE应用该SRAP的相关配置，并且，在操作9中，remote UE基于相应的SRAP配置，将RRC re-establishment complete消息或RRC resume complete消息发送给relay UE。
根据第一方面的实施例，在RRC连接建立过程中或重建过程中或重新开始(resume)过程中，能够使得第一终端设备(例如，remote UE)和第二终端设备(例如，relay UE)采用正确的配置发送和/或接收相关的RRC消息，防止remote UE和relay UE由于配置不一致而引起的消息传输失败，有助于remote UE经由relay UE与网络设备进行连接或恢复连接，保证了remote UE的业务质量和用户体验。
第二方面的实施例
本申请第二方面的实施例提供一种收发信息的方法。
在至少一个实施例中，收发信息的方法可以包括remote UE对中继适应协议(SRAP)实体的操作。
其中，remote UE对SRAP实体的操作可以包括SRAP实体的建立、配置、重配置、修改或释放。SRAP可以包括PC5 SRAP或边链路中继适应协议(SL SRAP)。
例如，remote UE对SRAP(例如，PC5 SRAP或SL SRAP)实体的建立可以在如下至少一个过程中进行：
第一终端设备(remote UE)选择或重选一个第二终端设备(relay UE)；
第一终端设备(remote UE)经由第二终端设备(relay UE)发起RRC连接建立过程和/或RRC重建过程和/或RRC resume过程；
第一终端设备(remote UE)经由第二终端设备(relay UE)发送RRC setup request和/或RRC re-establishment request和/或RRC resume request；
第一终端设备(remote UE)经由第二终端设备(relay UE)收到RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息；以及
第一终端设备(remote UE)从gNB收到path switch到第二终端设备(relay UE)(direct-to-indirect path switch)的RRC reconfiguration消息；
又例如，remote UE对SRAP(PC5 SRAP或SL SRAP)实体的配置、重配置或者修改可以在如下至少一个过程中进行：
第一终端设备(remote UE)使用默认的SRAP的相关配置；以及
第一终端设备(remote UE)收到RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SRAP的相关配置；
再例如，remote UE对SRAP(PC5 SRAP或SL SRAP)实体的释放可以在如下至少一个过程中进行：
第一终端设备(remote UE)从经由relay与gNB通信切换到直接与gNB通信(indirect-to-direct path switch)；
第一终端设备(remote UE)与第二终端设备(relay UE)之间的PC5连接(例如PC5-RRC连接或PC5 unicast link)被释放；以及
第一终端设备(remote UE)进入无限资源控制空闲(RRC_Idle)或无限资源控制去激活(RRC_Inactive)状态。
在至少另一个实施例中，收发信息的方法可以包括relay UE对中继适应协议 (SRAP)实体的操作。其中，relay UE对SRAP实体的操作可以包括对SRAP实体的建立、配置、重配置、修改或释放。SRAP可以包括PC5 SRAP或UuSRAP或SL SRAP)。
例如，relay UE对SRAP(PC5 SRAP或SL SRAP)实体的建立可以在如下至少一个过程中进行：
被授权(authorized)和/或鉴权(authenticated)为一个第二终端设备(relay UE)；
与第一终端设备(remote UE)建立PC5连接；(例如可以是与第一个第一终端设备(remote UE)建立PC5连接)
收到第一终端设备(remote UE)发送RRC setup request和/或RRC re-establishment request和/或RRC resume request；以及
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置；
又例如，remote UE对PC5 SRAP或SL SRAP实体的配置、重配置或修改可以在如下条件下进行：
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置。
又例如，relay UE对PC5 SRAP或SL SRAP实体的释放可以在如下至少一个过程中进行：
第一终端设备(remote UE)从经由所述第二终端设备与网络设备通信切换到直接与所述网络设备通信(indirect-to-direct path switch)；
第一终端设备(remote UE)与第二终端设备(relay UE)之间的PC5连接(例如PC5-RRC连接或PC5 unicast link)被释放；以及
没有第一终端设备(remote UE)与该第二终端设备(relay UE)之间有PC5连接。
又例如，relay UE对Uu SRAP实体的建立可以在如下至少一个过程中进行：
被授权(authorized)和/或鉴权(authenticated)为一个第二终端设备(relay UE)；
与第一终端设备(remote UE)建立PC5连接，例如可以是与第一个第一终端设备(remote UE)建立PC5连接；以及
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括Uu的SRAP的相关配置。
又例如，relay UE对Uu SRAP实体的配置、重配置或修改可以在如下条件下进行：
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置。
又例如，relay UE对Uu SRAP实体的释放可以在如下条件下进行：
该第二终端设备(relay UE)不再与一个第一终端设备(remote UE)有PC5连接。
本申请第二方面的实施例规定了remote UE和relay UE对PC5 SRAP实体和/或SL SRAP实体的相关操作，有助于remote UE和relay UE正确使用SRAP功能和配置进行消息传递，保证网络设备正确识别remote UE及其无线承载。
第三方面的实施例
第三方面的实施例提供一种收发信息的装置。应用于第一终端设备，例如，图1的remote UE 101。该收发信息的装置的功能与第一方面的实施例中收发信息的方法中第一终端设备的操作对应。
图7是第三方面的实施例所述的收发信息的装置的一个示意图。如图7所示，收发信息的装置700包括第一收发单元701，第一收发单元701被配置为：
与第二终端设备(relay UE)建立PC5连接；以及
第一收发单元经由所述第二终端设备(relay UE)通过默认配置接收无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者。
在至少一个实施例中，该默认配置包括默认的边链路无线链路控制承载配置(sidelink RLC bearer configuration)和/或默认的边链路中继适应协议(SRAP)的相关配置。
其中，默认的边链路无线链路控制承载配置是边链路无线链路控制0(SL-RLC0)默认配置或边链路无线链路控制1(SL-RLC1)默认配置。
默认的SRAP的相关配置包括下面至少一种：第一终端设备(remote UE)的本地或临时标识、增加的映射列表和删除的映射列表。
默认的SRAP的相关配置包括信令无线承载0(SRB0)默认的SRAP配置和/或信令无线承载1(SRB1)默认的SRAP配置。
在至少一个实施例中，第一收发单元701在第一终端设备(remote UE)与第二终端设备(relay UE)的PC5接口使用边链路无线链路控制承载配置1(SL-RLC1)接收信令无线承载1(SRB1)消息，该SRB1消息承载所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息，或者，所述SRB1消息是在所述第一终端设备(remote UE)的信令无线承载0(SRB0)消息被发送到网络设备之后、所述第一终端设备(remote UE)将要接收的第一条SRB1消息。
在至少一个实施例中，该第一收发单元701还被配置为：
在第一终端设备(remote UE)发送无线资源控制重建立请求(RRC re-establishment request)消息或无线资源控制重新开始(RRC resume request)消息时，或者在所述第一终端设备(remote UE)发起无线资源控制重建立过程或无线资源控制重新开始过程时，所述第一收发单元对SRB1使用SRB1默认的SRA配置和/或使用SL-RLC1默认配置。
例如，无线资源控制重新开始(RRC resume)消息或无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。其中，第一收发单元701在第一终端设备(remote UE)与第二终端设备(relay UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置发送无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
又例如，无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。其中，第一收发单元701应用所述SRAP的相关配置，发送无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
在至少另一个实施例中，第一收发单元在所述第一终端设备(remote UE)与所述第二终端设备(relay UE)的PC5接口使用SRB0默认的SRAP配置和/或边链路无线链路控制承载配置0(SL-RLC0)接收所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息。
在一个实例中，无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
其中，第一收发单元701在所述第一终端设备(remote UE)与所述第二终端设备(relay UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置发送无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
其中，第一收发单元701还被配置为：在所述第一终端设备(remote UE)与所述第二终端设备(relay UE)的PC5接口使用所述SRB0默认的SRAP配置和/或SL-RLC0默认配置接收无线资源控制重配置(RRC reconfiguration)消息。
在另一个实例中，无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
其中，第一收发单元701应用该SRAP的相关配置，并且，第一收发单元701在第一终端设备(remote UE)与所述第二终端设备(relay UE)的PC5接口发送无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
第四方面的实施例
第四方面的实施例提供一种收发信息的装置。应用于第二终端设备，例如，图1的relay UE 102。该收发信息的装置的功能与第一方面的实施例中relay UE的方法对应。
图8是第四方面的实施例所述的收发信息的装置的一个示意图。如图8所示，收发信息的装置800包括第二收发单元801，第二收发单元801被配置为：
第二收发单元801与第一终端设备(remote UE)建立PC5连接；以及
第二收发单元801通过默认配置向所述第一终端设备(remote UE)发送无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者，例如，第二收发单元801向第一终端设备转发由网络设备发送的所述无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息。
在至少一个实施例中个，该默认配置包括默认的边链路无线链路控制承载配置(sidelink RLC bearer configuration)和/或默认的边链路中继适应协议(SRAP)的相 关配置。
其中，默认的边链路无线链路控制承载配置是边链路无线链路控制0(SL-RLC0)默认配置或边链路无线链路控制1(SL-RLC1)默认配置。
默认的SRAP的相关配置包括下面至少一种：第一终端设备(remote UE)的本地或临时标识、增加的映射列表和删除的映射列表。
默认的SRAP的相关配置包括信令无线承载0(SRB0)默认的SRAP配置和/或信令无线承载1(SRB1)默认的SRAP配置。
在至少一个实施例中，第二收发单元801在第二终端设备(relay UE)与第一终端设备(remote UE)的PC5接口使用边链路无线链路控制承载配置1(SL-RLC1)发送信令无线承载1(SRB1)消息。其中，SRB1消息承载无线资源控制重新开始(RRC resume)消息和/或无线资源控制重建(RRC re-establishment)消息，或者，所述SRB1消息是在所述第一终端设备(remote UE)发送信令无线承载0(SRB0)消息到网络设备之后、所述第二终端设备(relay UE)向所述第一终端设备发送的第一条SRB1消息。
在一个实例中，无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
例如，第二收发单元801在所述第二终端设备(relay UE)与所述第一终端设备(remote UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置接收所述第一终端设备发送的无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
在另一个实例中，无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。此外，第二收发单元801可以基于SRAP的相关配置，接收第一终端设备发送的无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
在至少另一些实施例中，第二收发单元801在第二终端设备(relay UE)与第一终端设备(remote UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置发送所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息。
在一个实例中，无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
其中，第二收发单元801在所述第二终端设备(relay UE)与所述第一终端设备(remote UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置接收无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
第二收发单元还被配置为，在所述第二终端设备(relay UE)与所述第一终端设备(remote UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置发送无线资源控制重配置(RRC reconfiguration)消息。
在另一个实例中，无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
其中，第二收发单元801在第二终端设备(relay UE)与所述第一终端设备(remote UE)的PC5接口接收无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
第五方面的实施例
第五方面的实施例提供一种收发信息的装置。应用于第一终端设备，例如，图1的remote UE 101。该收发信息的装置的功能与第一方面的实施例中remote UE的方法对应。
图9是第五方面的实施例所述的收发信息的装置的一个示意图。如图9所示，收发信息的装置900包括第三收发单元901，第三收发单元901被配置为：
第三收发单元901与第二终端设备(relay UE)建立PC5连接；以及
第三收发单元901经由所述第二终端设备(relay UE)接收无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
其中，第三收发单元801收到RRC setup消息中的SRAP的相关配置后，使第一终端设备(remote UE)执行下面操作中的至少一个：
建立SRAP实体；
根据SRAP的相关配置来配置SRAP实体的参数；
将所述RRC setup消息中的终端设备标识应用为所述第一终端设备(remote UE)的小区无线网络临时标识(C-RNTI)；
基于SRAP的相关配置来发送无线资源控制建立完成(RRC setup complete)消息。
此外，第三收发单元901还可以具有第一收发单元701的功能，即，第一收发单元701的功能可以被整合到第三收发单元901中，使得第三收发单元901兼具有第一收发单元701的功能。
第六方面的实施例
第六方面的实施例提供一种收发信息的装置。应用于第二终端设备，例如，图1的relay UE 102。该收发信息的装置的功能与第一方面的实施例中第二终端设备的方法对应。
图10是第六方面的实施例所述的收发信息的装置的一个示意图。如图10所示，收发信息的装置1000包括第四收发单元1001，第四收发单元1001被配置为：
第四收发单元1001与第一终端设备(remote UE)建立PC5连接；以及
第四收发单元1001向第一终端设备(remote UE)发送无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，其中，RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
其中，第四收发单元1001向第一终端设备转发由网络设备发送的无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息。
第四收发单元1001还被配置为：基于SRAP的相关配置从所述第一终端设备接收无线资源控制建立完成(RRC setup complete)消息。
此外，第四收发单元1001还可以具有第二收发单元801的功能，即，第二收发单元801的功能可以被整合到第四收发单元1001中，使得第四收发单元1001兼具有第二收发单元801的功能。
第七方面的实施例
第七方面的实施例提供一种收发信息的装置。应用于网络设备，例如，图1的网络设备100。该收发信息的装置的功能与第一方面的实施例中网络设备的方法对应。
图11是第七方面的实施例所述的收发信息的装置的一个示意图。如图11所示，收发信息的装置1100包括第五收发单元1101，第五收发单元1101被配置为：
向第二终端设备(relay UE)发送用于第一终端设备(remote UE)的无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，其中，所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
第八方面的实施例
第八方面的实施例提供一种收发信息的装置。应用于第一终端设备，例如，图1的remote UE 101。该收发信息的装置的功能与第二方面的实施例中remote UE的方法对应。
图12是第八方面的实施例所述的收发信息的装置的一个示意图。如图12所示，收发信息的装置1200包括第六收发单元1201，第六收发单元1201被配置为：
在如下至少一个过程中进行中继适应协议(SRAP)(PC5 SRAP或SL SRAP)实体的建立：
第一终端设备(remote UE)选择或重选一个第二终端设备(relay UE)；
第一终端设备(remote UE)经由第二终端设备(relay UE)发起RRC连接建立过程和/或RRC重建过程和/或RRC resume过程；
第一终端设备(remote UE)经由第二终端设备(relay UE)发送RRC setup request和/或RRC re-establishment request和/或RRC resume request；
第一终端设备(remote UE)经由第二终端设备(relay UE)收到RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息；
第一终端设备(remote UE)从gNB收到path switch到第二终端设备(relay UE)(direct-to-indirect path switch)的RRC reconfiguration消息，
和/或，在如下至少一个过程中进行SRAP(PC5 SRAP或SL SRAP)实体的配置、重配置或者修改：
第一终端设备(remote UE)使用默认的SRAP的相关配置；
第一终端设备(remote UE)收到RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SRAP的相关配置，
和/或，在如下至少一个过程中进行SRAP(PC5 SRAP或SL SRAP)实体的释放：
第一终端设备(remote UE)从经由relay与gNB通信切换到直接与gNB通信(indirect-to-direct path switch)；
第一终端设备(remote UE)与第二终端设备(relay UE)之间的PC5连接(例如PC5-RRC连接或PC5 unicast link)被释放；
第一终端设备(remote UE)进入无限资源控制空闲(RRC_Idle)或无限资源控制去激活(RRC_Inactive)状态。
第九方面的实施例
第九方面的实施例提供一种收发信息的装置。应用于第二终端设备，例如，图1的relay UE 102。该收发信息的装置的功能与第二方面的实施例中relay UE的方法对应。
图13是第九方面的实施例所述的收发信息的装置的一个示意图。如图12所示，收发信息的装置1300包括第七收发单元1301，第七收发单元1301被配置为：
在如下至少一个过程中进行SRAP(PC5 SRAP或SL SRAP)实体的建立：
被授权(authorized)和/或鉴权(authenticated)为一个第二终端设备(relay UE)；
与第一终端设备(remote UE)建立PC5连接；(例如是与第一个第一终端设备(remote UE)建立PC5连接)
收到第一终端设备(remote UE)发送RRC setup request和/或RRC re-establishment request和/或RRC resume request；
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置，
和/或，在如下条件下进行PC5 SRAP或SL SRAP实体的配置、重配置或修改：
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或 RRC reconfiguration消息中包括SL的SRAP的相关配置，
和/或，在如下至少一个过程中进行PC5 SRAP或SL SRAP实体的释放：
第一终端设备(remote UE)从经由所述第二终端设备与网络设备通信切换到直接与所述网络设备通信(indirect-to-direct path switch)；
第一终端设备(remote UE)与第二终端设备(relay UE)之间的PC5连接(例如PC5-RRC连接或PC5 unicast link)被释放；
没有第一终端设备(remote UE)与该第二终端设备(relay UE)之间有PC5连接，
和/或，在如下至少一个过程中进行Uu SRAP实体的建立：
被授权(authorized)和/或鉴权(authenticated)为一个第二终端设备(relay UE)；
与第一终端设备(remote UE)建立PC5连接；
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括Uu的SRAP的相关配置，
和/或，在如下条件下进行Uu SRAP实体的配置、重配置或修改：
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置，
和/或，在如下条件下进行Uu SRAP实体的释放：
该第二终端设备(relay UE)不再与一个第一终端设备(remote UE)有PC5连接。
第十方面的实施例
本申请实施例还提供一种通信系统，该通信系统可以包括第一终端设备、第二终端设备和网络设备，例如，第一终端设备可以是图1的remote UE 101，第二终端设备可以是图1的relay UE 102，网络设备可以是图1的网络设备100。其中，第一终端设备和第二终端设备可以采用类似的终端设备的结构。
图14是第十方面的实施例的通信系统中的终端设备的示意图。图14所示的终端设备可以用于第一终端设备，也可以用于第二终端设备。
如图14所示，终端设备1400可以包括：处理器1410(例如中央处理器CPU)和存储器1420；存储器1420耦合到处理器1410。其中该存储器1420可存储各种数据；此外还存储信息处理的程序1430，并且在处理器1410的控制下执行该程序1430。
例如，处理器1410可以被配置为执行程序而实现如第一方面、或第二方面的实 施例所述的方法。
此外，如图14所示，终端设备1400还可以包括：收发机1440和天线1450等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，终端设备1400也并不是必须要包括图14中所示的所有部件；此外，终端设备1400还可以包括图14中没有示出的部件，可以参考现有技术。
图15是第十方面的实施例的通信系统中的网络设备的示意图。
如图15所示，网络设备1500可以包括：处理器1510(例如中央处理器CPU)和存储器1520；存储器1520耦合到处理器1510。其中该存储器1520可存储各种数据；此外还存储信息处理的程序1530，并且在处理器1510的控制下执行该程序1530。
例如，处理器1510可以被配置为执行程序而实现如第一方面、或第二方面的实施例所述的方法。
此外，如图15所示，网络设备1500还可以包括：收发机1540和天线1550等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，网络设备1500也并不是必须要包括图15中所示的所有部件；此外，网络设备1500还可以包括图15中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种计算机程序，其中当在第一终端设备或第二终端设备中执行所述程序时，所述程序使得所述第一终端设备或第二终端设备执行第一、二方面的实施例所述的方法。
本申请实施例还提供一种存储有计算机程序的存储介质，其中所述计算机程序使得第一终端设备或第二终端设备执行第一、二方面的实施例所述的方法。
本申请实施例还提供一种计算机程序，其中当在网络设备中执行所述程序时，所述程序使得所述网络设备执行第一、二方面的实施例所述的方法。
本申请实施例还提供一种存储有计算机程序的存储介质，其中所述计算机程序使得网络设备执行第一、二方面的实施例所述的方法。
本申请以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本申请涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。本申请还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本申请实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模 块或二者组合。例如，图中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可插入移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本申请进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本申请保护范围的限制。本领域技术人员可以根据本申请的精神和原理对本申请做出各种变型和修改，这些变型和修改也在本申请的范围内。
关于包括以上实施例的实施方式，还公开下述的附记：
1.一种收发信息的方法，应用于第一终端设备(remote UE)，所述方法包括：
第一终端设备(remote UE)与第二终端设备(relay UE)建立PC5连接；以及
所述第一终端设备(remote UE)经由所述第二终端设备(relay UE)通过默认配置接收无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一 者。
2.如附记1所述的装置，其中，
所述默认配置包括默认的边链路无线链路控制承载配置(sidelink RLC bearer configuration)和/或默认的边链路中继适应协议(SRAP)的相关配置。
3.如附记2所述的装置，其中，
所述默认的边链路无线链路控制承载配置是边链路无线链路控制0(SL-RLC0)默认配置或边链路无线链路控制1(SL-RLC1)默认配置。
4.如附记2所述的装置，其中，
所述默认的SRAP的相关配置包括下面至少一种：第一终端设备(remote UE)的本地或临时标识、增加的映射列表和删除的映射列表。
5如附记2所述的装置，其中，
所述默认的SRAP的相关配置包括信令无线承载0(SRB0)默认的SRAP配置和/或信令无线承载1(SRB1)默认的SRAP配置。
6.如附记1所述的方法，其中，
所述第一终端设备(remote UE)在与所述第二终端设备(relay UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置接收信令无线承载1(SRB1)消息。
7.如附记6所述的方法，其中，
所述SRB1消息承载所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息，或者，所述SRB1消息是在所述第一终端设备(remote UE)的信令无线承载0(SRB0)消息被发送到网络设备之后、所述第一终端设备(remote UE)将要接收的第一条SRB1消息。
8.如附记6所述的方法，其中，所述方法还包括：
所述第一终端设备(remote UE)在发送无线资源控制重建立请求(RRC re-establishment request)消息或无线资源控制重新开始(RRC resume request)消息时，或者所述第一终端设备(remote UE)在发起无线资源控制重建立过程或无线资源控制重新开始过程时，对SRB1使用SRB1默认的SRAP配置和/或使用SL-RLC1默认配置。
9.如附记6所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
10.如附记9所述的方法，其中，
所述第一终端设备(remote UE)在与所述第二终端设备(relay UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置发送无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
11.如附记6所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
12.如附记11所述的方法，其中，
所述第一终端设备(remote UE)应用所述SRAP的相关配置，发送无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
13.如附记1所述的方法，其中，
所述第一终端设备(remote UE)在与所述第二终端设备(relay UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置接收所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息。
14.如附记13所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
15.如附记14所述的方法，其中，
所述第一终端设备(remote UE)在与所述第二终端设备(relay UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置发送无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
16.如附记14所述的方法，其中，所述方法还包括：
所述第一终端设备(remote UE)在与所述第二终端设备(relay UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置接收无线资源控制重配置(RRC  reconfiguration)消息。
17.如附记13所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
18.如附记17所述的方法，其中，
所述第一终端设备(remote UE)应用该SRAP的相关配置，并且，所述第一终端设备(remote UE)在与所述第二终端设备(relay UE)的PC5接口发送无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
19.一种收发信息的方法，应用于第二终端设备(relay UE)，所述方法包括：
第二终端设备(relay UE)与第一终端设备(remote UE)建立PC5连接；以及
所述第二终端设备(relay UE)通过默认配置向所述第一终端设备(remote UE)发送无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者。
20.如权利要求19所述的装置，其中，
所述默认配置包括默认的边链路无线链路控制承载配置(sidelink RLC bearer configuration)和/或默认的边链路中继适应协议(SRAP)的相关配置。
21.如权利要求20所述的装置，其中，
所述默认的边链路无线链路控制承载配置是边链路无线链路控制0(SL-RLC0)默认配置或边链路无线链路控制1(SL-RLC1)默认配置。
22.如权利要求20所述的装置，其中，
所述默认的SRAP的相关配置包括下面至少一种：第一终端设备(remote UE)的本地/临时标识、增加的映射列表和删除的映射列表。
23.如权利要求20所述的装置，其中，
所述默认的SRAP的相关配置包括信令无线承载0(SRB0)默认的SRAP配置和/或信令无线承载1(SRB1)默认的SRAP配置。
24.如附记19所述的方法，其中，
所述第二终端设备向所述第一终端设备转发由网络设备发送的所述无线资源控 制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息。
25.如附记19所述的方法，其中，
所述第二终端设备(relay UE)在与所述第一终端设备(remote UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置发送信令无线承载1(SRB1)消息，
26.如附记25所述的方法，其中，
所述SRB1消息承载所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息，或者，所述SRB1消息是在所述第一终端设备(remote UE)发送信令无线承载0(SRB0)消息到网络设备之后、所述第二终端设备(relay UE)向所述第一终端设备发送的第一条SRB1消息。
27.如附记25所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
28.如附记27所述的方法，其中，
所述第二终端设备(relay UE)在与所述第一终端设备(remote UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置接收所述第一终端设备发送的无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
29.如附记25所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
30.如附记29所述的方法，其中，
所述第二终端设备(relay UE)基于所述SRAP的相关配置，接收所述第一终端设备发送的无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
31.如附记19所述的方法，其中，
所述第二终端设备(relay UE)在与所述第一终端设备(remote UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置发送所述无线资源控制重新开 始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息。
32.如附记31所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
33.如附记32所述的方法，其中，
所述第二终端设备(relay UE)在与所述第一终端设备(remote UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置接收无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
34.如附记32所述的方法，其中，所述方法还包括：
所述第二终端设备(relay UE)在与所述第一终端设备(remote UE)的PC5接口使用SRB0默认的SRAP配置和/或SL-RLC0默认配置发送无线资源控制重配置(RRC reconfiguration)消息。
35.如附记31所述的方法，其中，
所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
36.如附记35所述的方法，其中，
所述第二终端设备(relay UE)在与所述第一终端设备(remote UE)的PC5接口接收无线资源控制重新开始完成(RRC resume complete)消息和/或无线资源控制重建完成(RRC re-establishment complete)消息。
37.一种收发信息的方法，应用于第一终端设备(remote UE)，所述方法包括：
第一终端设备(remote UE)与第二终端设备(relay UE)建立PC5连接；以及
所述第一终端设备(remote UE)经由所述第二终端设备(relay UE)接收无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，
所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
38.如附37所述的方法，其中，
所述第一终端设备(remote UE)收到所述RRC setup消息中的SRAP的相关配 置后，执行下面操作中的至少一个：
建立SRAP实体；
根据SRAP的相关配置来配置SRAP实体的参数；
将所述RRC setup消息中的终端设备标识应用为所述第一终端设备(remote UE)的小区无线网络临时标识(C-RNTI)；
基于SRAP的相关配置来发送无线资源控制建立完成(RRC setup complete)消息。
39.一种收发信息的方法，应用于第二终端设备(relay UE)，所述方法包括：
第二终端设备(relay UE)与第一终端设备(remote UE)建立PC5连接；以及
所述第二终端设备(relay UE)向所述第一终端设备(remote UE)发送无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，
所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
40.如附记39所述的方法，其中，
所述第二终端设备向所述第一终端设备转发由网络设备发送的所述无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息。
41.如附记39所述的方法，其中，所述方法还包括：
所述第二终端设备(relay UE)基于SRAP的相关配置从所述第一终端设备接收无线资源控制建立完成(RRC setup complete)消息。
42.一种收发信息的方法，应用于网络设备，所述方法包括：
网络设备向第二终端设备(relay UE)发送用于第一终端设备(remote UE)的无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，
所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
43.一种收发信息的方法，应用于第一终端设备(remote UE)，所述方法包括：
在如下至少一个过程中进行中继适应协议(SRAP)(PC5 SRAP或SL SRAP)实 体的建立：
第一终端设备(remote UE)选择或重选一个第二终端设备(relay UE)；
第一终端设备(remote UE)经由第二终端设备(relay UE)发起RRC连接建立过程和/或RRC重建过程和/或RRC resume过程；
第一终端设备(remote UE)经由第二终端设备(relay UE)发送RRC setup request和/或RRC re-establishment request和/或RRC resume request；
第一终端设备(remote UE)经由第二终端设备(relay UE)收到RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息；
第一终端设备(remote UE)从gNB收到path switch到第二终端设备(relay UE)(direct-to-indirect path switch)的RRC reconfiguration消息；
和/或，在如下至少一个过程中进行SRAP(PC5 SRAP或SL SRAP)实体的配置、重配置或者修改：
第一终端设备(remote UE)使用默认的SRAP的相关配置；
第一终端设备(remote UE)收到RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SRAP的相关配置，
和/或，在如下至少一个过程中进行SRAP(PC5 SRAP或SL SRAP)实体的释放：
第一终端设备(remote UE)从经由relay与gNB通信切换到直接与gNB通信(indirect-to-direct path switch)；
第一终端设备(remote UE)与第二终端设备(relay UE)之间的PC5连接(例如PC5-RRC连接或PC5 unicast link)被释放；
第一终端设备(remote UE)进入无限资源控制空闲(RRC_Idle)或无限资源控制去激活(RRC_Inactive)状态。
44.一种收发信息的方法，应用于第二终端设备(relay UE)，所述方法包括：
在如下至少一个过程中进行SRAP(PC5 SRAP或SL SRAP)实体的建立：
被授权(authorized)和/或鉴权(authenticated)为一个第二终端设备(relay UE)；
与第一终端设备(remote UE)建立PC5连接；(例如是与第一个第一终端设备(remote UE)建立PC5连接)
收到第一终端设备(remote UE)发送RRC setup request和/或RRC re-establishment request和/或RRC resume request；
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置，
和/或，在如下条件下进行PC5 SRAP或SL SRAP实体的配置、重配置或修改：
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置，
和/或，在如下至少一个过程中进行PC5 SRAP或SL SRAP实体的释放：
第一终端设备(remote UE)从经由所述第二终端设备与网络设备通信切换到直接与所述网络设备通信(indirect-to-direct path switch)；
第一终端设备(remote UE)与第二终端设备(relay UE)之间的PC5连接(例如PC5-RRC连接或PC5 unicast link)被释放；
没有第一终端设备(remote UE)与该第二终端设备(relay UE)之间有PC5连接，
和/或，
在如下至少一个过程中进行Uu SRAP实体的建立：
被授权(authorized)和/或鉴权(authenticated)为一个第二终端设备(relay UE)；
与第一终端设备(remote UE)建立PC5连接；
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括Uu的SRAP的相关配置，
和/或，在如下条件下进行Uu SRAP实体的配置、重配置或修改：
收到gNB发送的RRC setup和/或RRC re-establishment和/或RRC resume和/或RRC reconfiguration消息中包括SL的SRAP的相关配置；
和/或，在如下条件下进行Uu SRAP实体的释放：
该第二终端设备(relay UE)不再与一个第一终端设备(remote UE)有PC5连接。

Claims (20)

  1. 一种收发信息的装置，应用于第一终端设备(remote UE)，所述装置包括第一收发单元，所述第一收发单元被配置为：
    与第二终端设备(relay UE)建立PC5连接；以及
    所述第一收发单元经由所述第二终端设备(relay UE)通过默认配置接收无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者。
  2. 如权利要求1所述的装置，其中，
    所述默认配置包括默认的边链路无线链路控制承载配置(sidelink RLC bearer configuration)和/或默认的边链路中继适应协议(SRAP)的相关配置。
  3. 如权利要求2所述的装置，其中，
    所述默认的边链路无线链路控制承载配置是边链路无线链路控制0(SL-RLC0)默认配置或边链路无线链路控制1(SL-RLC1)默认配置。
  4. 如权利要求2所述的装置，其中，
    所述默认的SRAP的相关配置包括下面至少一种：第一终端设备(remote UE)的本地或临时标识、增加的映射列表和删除的映射列表。
  5. 如权利要求2所述的装置，其中，
    所述默认的SRAP的相关配置包括信令无线承载0(SRB0)默认的SRAP配置和/或信令无线承载1(SRB1)默认的SRAP配置。
  6. 如权利要求1所述的装置，其中，
    所述第一收发单元在所述第一终端设备(remote UE)与所述第二终端设备(relay UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置接收信令无线承载1(SRB1)消息。
  7. 如权利要求6所述的装置，其中，
    所述SRB1消息承载所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息，或者，所述SRB1消息是在所述第一终端设备(remote UE)的信令无线承载0(SRB0)消息被发送到网络设备之后、所述第一终端设备(remote UE)将要接收的第一条SRB1消息。
  8. 如权利要求6所述的装置，其中，所述第一收发单元还被配置为：
    在所述第一终端设备(remote UE)发送无线资源控制重建立请求(RRC re-establishment request)消息或无线资源控制重新开始(RRC resume request)消息时，或者在所述第一终端设备(remote UE)发起无线资源控制重建立过程或无线资源控制重新开始过程时，所述第一收发单元对SRB1使用SRB1默认的SRAP配置和/或使用SL-RLC1默认配置。
  9. 如权利要求6所述的装置，其中，
    所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息不包括边链路中继适应协议(SRAP)的相关配置。
  10. 如权利要求9所述的装置，其中，
    所述第一收发单元在所述第一终端设备(remote UE)与所述第二终端设备(relay UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置发送无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
  11. 如权利要求6所述的装置，其中，
    所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
  12. 如权利要求11所述的装置，其中，
    所述第一收发单元应用所述SRAP的相关配置，发送无线资源控制重新开始完成(RRC resume complete)消息和/或所述无线资源控制重建完成(RRC re-establishment complete)消息。
  13. 一种收发信息的装置，应用于第二终端设备(relay UE)，所述装置包括第二收发单元，所述第二收发单元被配置为：
    所述第二收发单元与第一终端设备(remote UE)建立PC5连接；以及
    所述第二收发单元通过默认配置向所述第一终端设备(remote UE)发送无线资源控制重新开始(RRC resume)消息、无线资源控制重建(RRC re-establishment)消息和无线资源控制重配置(RRC reconfiguration)消息中的至少一者。
  14. 如权利要求13所述的装置，其中，
    所述默认配置包括默认的边链路无线链路控制承载配置(sidelink RLC bearer configuration)和/或默认的边链路中继适应协议(SRAP)的相关配置。
  15. 如权利要求14所述的装置，其中，
    所述默认的边链路无线链路控制承载配置是边链路无线链路控制0(SL-RLC0)默认配置或边链路无线链路控制1(SL-RLC1)默认配置；和/或
    所述默认的SRAP的相关配置包括下面至少一种：第一终端设备(remote UE)的本地/临时标识、增加的映射列表和删除的映射列表；和/或
    所述默认的SRAP的相关配置包括信令无线承载0(SRB0)默认的SRAP配置和/或信令无线承载1(SRB1)默认的SRAP配置。
  16. 如权利要求15所述的装置，其中，
    所述第二收发单元在所述第二终端设备(relay UE)与所述第一终端设备(remote UE)的PC5接口使用SRB1默认的SRAP配置和/或SL-RLC1默认配置发送信令无线承载1(SRB1)消息。
  17. 如权利要求16所述的装置，其中，
    所述SRB1消息承载所述无线资源控制重新开始(RRC resume)消息和/或所述无线资源控制重建(RRC re-establishment)消息，或者，所述SRB1消息是在所述第一终端设备(remote UE)发送信令无线承载0(SRB0)消息到网络设备之后、所述第二终端设备(relay UE)向所述第一终端设备发送的第一条SRB1消息。
  18. 如权利要求16所述的装置，其中，
    所述无线资源控制重新开始(RRC resume)消息或所述无线资源控制重建(RRC re-establishment)消息包括边链路中继适应协议(SRAP)的相关配置。
  19. 一种收发信息的装置，应用于第一终端设备(remote UE)，所述装置包括第三收发单元，所述第三收发单元被配置为：
    所述第三收发单元与第二终端设备(relay UE)建立PC5连接；以及
    所述第三收发单元经由所述第二终端设备(relay UE)接收无线资源控制建立(RRC setup)消息、无线资源控制重新开始(RRC resume)消息和无线资源控制重建(RRC re-establishment)消息中的至少一者，
    所述RRC setup消息、RRC resume消息和RRC re-establishment消息中的至少一者包括边链路中继适应协议(SRAP)的相关配置。
  20. 如权利要求19所述的装置，其中，
    所述第三收发单元收到所述RRC setup消息中的SRAP的相关配置后，使所述第 一终端设备(remote UE)执行下面操作中的至少一个：
    建立SRAP实体；
    根据SRAP的相关配置来配置SRAP实体的参数；
    将所述RRC setup消息中的终端设备标识应用为所述第一终端设备(remote UE)的小区无线网络临时标识(C-RNTI)；
    基于SRAP的相关配置来发送无线资源控制建立完成(RRC setup complete)消息。
PCT/CN2022/070768 2022-01-07 2022-01-07 收发信息的方法、装置和通信系统 WO2023130362A1 (zh)

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