WO2024259814A1 - 触发中继终端设备进入rrc连接态的方法及相关设备 - Google Patents

触发中继终端设备进入rrc连接态的方法及相关设备 Download PDF

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Publication number
WO2024259814A1
WO2024259814A1 PCT/CN2023/119065 CN2023119065W WO2024259814A1 WO 2024259814 A1 WO2024259814 A1 WO 2024259814A1 CN 2023119065 W CN2023119065 W CN 2023119065W WO 2024259814 A1 WO2024259814 A1 WO 2024259814A1
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WIPO (PCT)
Prior art keywords
terminal device
rrc
relay terminal
message
srb1
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PCT/CN2023/119065
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English (en)
French (fr)
Inventor
林佩
毕奇
蒋峥
佘小明
陈鹏
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Publication of WO2024259814A1 publication Critical patent/WO2024259814A1/zh
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

Definitions

  • the present disclosure is based on a Chinese patent application with application number 202310738179.X, application date June 20, 2023, and invention name “Method and related equipment for triggering a relay terminal device to enter a connected state”, and claims the priority of the Chinese patent application.
  • the entire content of the Chinese patent application is hereby introduced into the present disclosure as a reference.
  • the present disclosure relates to the field of wireless communication technology, and in particular to a method for triggering a relay terminal device to enter an RRC connection state, a remote terminal device, a network side device, a relay terminal device, a communication system, an electronic device, a computer-readable storage medium, and a computer program.
  • 3GPP introduced NR sidelink technology in R16, mainly to realize V2X-related road safety services.
  • 3GPP carried out research on relay technology (NR sidelink Relay) based on NR direct link in R17, and introduced UE-to-Network Relay (U2N Relay) technology.
  • Remote terminal devices can communicate with base stations through relay terminal devices. When the link quality between the remote terminal device and the base station deteriorates, the remote terminal device can select a suitable relay terminal device to ensure service continuity through UE-to-Network relay technology.
  • a remote terminal device when a remote terminal device performs U2N relay communication through a relay terminal device, if the relay terminal device is in the Radio Resource Control (RRC) idle state (RRC_IDLE) or the RRC inactive state (RRC_INACTIVE), it will first initiate an RRC connection establishment (RRC connection establishment) or an RRC connection resume (RRC connection resume) and enter the RRC connected state (RRC_CONNECTED).
  • RRC Radio Resource Control
  • RRC_IDLE Radio Resource Control
  • RRC_INACTIVE Radio Resource Control
  • RRC connection establishment RRC connection establishment
  • RRC connection resume RRC connection resume
  • RRC_CONNECTED RRC connected state
  • the path management scenario in the multi-path relay scenario it involves adding or changing the relay terminal device.
  • the newly added or changed relay terminal device is in the RRC idle state or the RRC inactive state at this time, how to trigger the relay terminal device to enter the RRC connected state becomes a technical problem that needs to be solved urgently.
  • the present disclosure provides a method and related equipment for triggering a relay terminal device to enter an RRC connected state, which at least to a certain extent overcomes the problem of how to trigger a relay terminal device to enter an RRC connected state in an existing multi-path relay scenario.
  • a method for triggering a relay terminal device to enter an RRC connection state is provided, which is applied to a remote terminal device, and the method includes: receiving a radio resource control RRC reconfiguration message sent by a network side device; sending a first signaling message to the relay terminal device, wherein the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • the first signaling message includes at least one of a direct link interface PC5-RRC message or an RRC reconfiguration completion message; wherein, when the first signaling message includes a PC5-RRC message, the PC5-RRC message includes at least a first information element, and the first information element is used to trigger the relay terminal device to enter an RRC connection state; when the first signaling message includes an RRC reconfiguration completion message, the remote terminal device sends an RRC reconfiguration completion message to the network side device through the relay terminal device, and the RRC reconfiguration completion message is sent by the remote terminal device using the default configured direct link-radio link control SL-RLC1.
  • the sending of the first signaling message to the relay terminal device includes: when the RRC reconfiguration message contains relevant configuration information of the signaling radio bearer SRB1 on the non-direct path, using the default configured SL-RLC1 to send the RRC reconfiguration completion message to the relay terminal device, so that the relay terminal device in the RRC idle state performs relevant operations of RRC connection establishment or the relay terminal device in the RRC inactive state performs relevant operations of RRC connection recovery.
  • the relevant configuration information of SRB1 on the non-direct path includes at least one of the following: an independent SRB1 is configured on the non-direct path, a SRB1 supporting separation is configured and the main RLC entity of the separated SRB1 is configured on the non-direct path, and an SRB1 supporting redundant transmission is configured.
  • the sending of the first signaling message to the relay terminal device includes at least one of the following: when the RRC reconfiguration message includes a second information element, sending a PC5-RRC message to the relay terminal device; or when SRB1 is not configured on a non-direct path in the RRC reconfiguration message, or a separated SRB1 is configured and the main RLC entity configuration of the separated SRB1 is not configured on a non-direct path, the remote terminal device sends a PC5-RRC message to the relay terminal device; or when the remote terminal device determines that a PC5-RRC message needs to be sent during the interaction with the relay terminal device, sending a PC5-RRC message to the relay terminal device.
  • the second information element is used to indicate that the remote terminal device needs to send a PC5-RRC message to the relay terminal device.
  • the sending of the first signaling message to the relay terminal device includes at least one of the following: during the direct link discovery process or PC5 connection establishment process between the remote terminal device and the relay terminal device, the remote terminal device obtains the RRC status information of the relay terminal device, and when the RRC status information of the relay terminal device obtained is an RRC idle state or an RRC inactive state, the PC5-RRC message is sent to the relay terminal device; or during the direct link discovery process or PC5 connection establishment process between the remote terminal device and the relay terminal device, when the relay terminal device indicates that the remote terminal device needs to send a PC5-RRC message, the PC5-RRC message is sent to the relay terminal device.
  • the method further includes: sending an RRC reconfiguration completion message to the network side device via a direct path and/or an indirect path.
  • the sending of the RRC reconfiguration completion message to the network side device via a direct path and/or an indirect path includes at least one of the following: when a separated SRB1 supporting redundant transmission is configured in the RRC reconfiguration message, sending the RRC reconfiguration completion message to the network side device via a direct path and an indirect path; when the RRC reconfiguration message is configured with support for separated SRB1 and the main RLC entity for separated SRB1 is configured on a direct path, or an independent SRB1 is configured on the direct path, sending the RRC reconfiguration completion message to the network side device via the direct path; when a remote terminal device needs to send a PC5-RRC message to a relay terminal device and an available SRB1 is configured on the direct path, sending the RRC reconfiguration completion message to the network side device via the direct path SRB1.
  • the direct path when a remote terminal device needs to send a PC5-RRC message to a relay terminal device, and the direct path is configured with an available SRB1, the direct path is configured with an available SRB1 including at least one of the following: the direct path is configured with an independent SRB1, or is configured with a main RLC entity that supports separation of SRB1 and the separation of SRB1 is configured on the direct path.
  • the RRC reconfiguration message includes at least one of the following information: local ID information of the remote terminal device; source layer 2 ID information of the relay terminal device; direct link relay adaptation protocol SRAP configuration information; SRB1 related configuration information, the SRB1 related configuration information includes at least one of the following: configuring an independent SRB1 on a direct path and/or a non-direct path, configuring an SRB1 that supports separation, and configuring an SRB1 that supports redundant transmission; a second information element, used to indicate that the remote terminal device needs to send a PC5-RRC message to the relay terminal device.
  • a method for triggering a relay terminal device to enter an RRC connection state is provided, which is applied to a network side device, and the method includes: sending an RRC reconfiguration message to a remote terminal device, so that the remote terminal device sends a first signaling message to the relay terminal device according to the RRC reconfiguration message, and the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • a method for triggering a relay terminal device to enter an RRC connected state is provided, which is applied to the relay terminal device, and the method includes: receiving a first signaling message sent by a remote terminal device; when the relay terminal device is in an RRC idle state, performing an RRC connection establishment operation; when the relay terminal device is in an RRC inactive state, performing an RRC connection recovery operation.
  • a remote terminal device including: a configuration message receiving module, used to receive an RRC reconfiguration message sent by a network side device; a signaling message sending module, used to send a first signaling message to a relay terminal device, wherein the first signaling message is used to trigger the relay terminal device in an RRC idle state to execute RRC connection establishment or trigger the relay terminal device in an RRC inactive state to execute RRC connection recovery.
  • a network side device including: a configuration message sending module, used to send an RRC reconfiguration message to a remote terminal device, so that the remote terminal device sends a first signaling message to a relay terminal device according to the RRC reconfiguration message, and the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • a relay terminal device including: a signaling message receiving module, used to receive a first signaling message sent by a remote terminal device; an RRC connection module, used to perform an RRC connection establishment operation when the relay terminal device is in an RRC idle state; and perform an RRC connection recovery operation when the relay terminal device is in an RRC inactive state.
  • a communication system including a network side device, a relay terminal device and a remote terminal device, wherein the network side device is used to send an RRC reconfiguration message to the remote terminal device; the remote terminal device is used to receive a radio resource control RRC reconfiguration message sent by the network side device; a first signaling message is sent to the relay terminal device, wherein the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery; the relay terminal device is used to receive the first signaling message sent by the remote terminal device; when the relay terminal device is in the RRC idle state, the operation of establishing the RRC connection is performed; when the relay terminal device is in the RRC inactive state, the operation of recovering the RRC connection is performed.
  • an electronic device comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the above-mentioned method of triggering a relay terminal device to enter an RRC connected state by executing the executable instructions.
  • a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the method for triggering a relay terminal device to enter an RRC connected state is implemented.
  • a computer program product including executable instructions, which are stored in a computer-readable storage medium.
  • a processor of an electronic device reads the executable instructions from the computer-readable storage medium, and the processor executes the executable instructions, so that the electronic device executes the above-mentioned method of triggering a relay terminal device to enter an RRC connected state.
  • FIG1 shows a schematic diagram of an exemplary system architecture of a method for triggering a relay terminal device to enter an RRC connected state in an embodiment of the present disclosure.
  • FIG2 shows a flow chart of a method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG3 shows a flow chart of another method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG4 shows a flow chart of another method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG5 shows a flow chart of another method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG6 shows a flow chart of a method for triggering a relay terminal device to enter an RRC connection state, which is applied to a network side device and is provided in an embodiment of the present disclosure.
  • FIG7 shows a flow chart of a method for triggering a relay terminal device to enter an RRC connected state, which is applied to a relay terminal device and is provided in an embodiment of the present disclosure.
  • FIG8 shows an interaction diagram of a first example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG9 shows an interaction diagram of a second example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG10 shows an interaction diagram of a third example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG11 shows an interaction diagram of a fourth example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG12 shows an interaction diagram of the fifth example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG13 shows an interaction diagram of a sixth example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG14 shows an interaction diagram of the seventh example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG15 shows an interaction diagram of the eighth example of triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • FIG16 shows a schematic structural diagram of a remote terminal device provided in an embodiment of the present disclosure.
  • FIG17 shows a schematic diagram of the structure of a network side device provided in an embodiment of the present disclosure.
  • FIG18 shows a schematic structural diagram of a relay terminal device provided in an embodiment of the present disclosure.
  • FIG. 19 shows a structural block diagram of an electronic device in an embodiment of the present disclosure.
  • FIG1 shows a schematic diagram of an exemplary system architecture of a method for triggering a relay terminal device to enter an RRC connected state or an apparatus for triggering a relay terminal device to enter an RRC connected state that can be applied to an embodiment of the present disclosure.
  • the system architecture 100 may include a remote terminal device 101 , a relay terminal device 102 and a network side device 103 .
  • the network can be a medium that provides a communication link between the remote terminal device 101 and the relay terminal device 102, and between the remote terminal device 101 and the network side device 103, and can be a wired network or a wireless network.
  • the user can use the remote terminal device 101 to interact with the network side device 103 through the network to receive or send messages.
  • the user can also use the remote terminal device 101 to interact with the network side device 103 through the relay terminal device 102 to receive or send messages.
  • the wireless network described above uses standard communication technologies and/or protocols.
  • the wireless network is typically the Internet, but may also be any network, including but not limited to a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), a mobile, wired or wireless network, a private network or any combination of a virtual private network.
  • technologies and/or formats including Hyper Text Mark-up Language (HTML), Extensible Markup Language (XML), etc. are used to represent data exchanged over the network.
  • conventional encryption technologies such as Secure Socket Layer (SSL), Transport Layer Security (TLS), Virtual Private Network (VPN), Internet Protocol Security (IPsec), etc. may be used to encrypt all or some links.
  • customized and/or dedicated data communication technologies may be used to replace or supplement the above-mentioned data communication technologies.
  • the network side device 103 may be a base station.
  • the wireless access network may provide network services to the terminal device through the base station. Different operators may provide different network services to the terminal device. It may also be understood that different operators correspond to different operator networks.
  • the remote terminal device (User Equipment, UE) 101 and the relay terminal device 102 can be various electronic devices, also known as user equipment, terminals, etc., including but not limited to smart phones, tablet computers, laptop computers, desktop computers, wearable devices, augmented reality devices, virtual reality devices, etc.
  • the client of the application installed in different remote terminal devices 101 and relay terminal devices 102 is the same, or is a client of the same type of application based on different operating systems.
  • the specific form of the client of the application can also be different, for example, the application client can be a mobile client, a PC client, etc.
  • remote terminal devices 101, relay terminal devices 102, and network side devices 103 in FIG1 is merely illustrative, and any number of remote terminal devices, relay terminal devices, and network side devices may be provided according to actual needs, which is not limited in the embodiments of the present disclosure.
  • the remote terminal device 101 can communicate directly with the base station through the Uu interface, which is called a direct connection path; the remote terminal device 101 can communicate with the network side device 103 through the PC5 interface between the relay terminal device 102 and the Uu interface between the relay terminal device 102 and the network side device 103, which is called a non-direct connection path.
  • terminal devices can communicate with the network side through a direct path or an indirect path, but terminal devices are not supported to communicate through both a direct path and an indirect path at the same time, that is, multi-path relay communication technology (multi-path Relay) is not supported.
  • multi-path relay communication technology multi-path Relay
  • 3GPP introduced Multi-Path Relay technology in the R18 Sidelink Relay enhancement project and supports the following path management scenarios.
  • Scenario A The remote terminal device first works on a direct connection path, and then an indirect connection path is added;
  • Scenario B The remote terminal device first works on an indirect connection path, and then a direct connection path is added;
  • Scenario C The remote terminal device first works in multipath mode, and then deletes the indirect connection path;
  • Scenario D The remote terminal device first works in multipath mode, and then deletes the direct connection path;
  • Scenario E The remote terminal device works in multipath mode, keeps the direct connection path unchanged, and changes the indirect connection path (reselects a new relay terminal device);
  • Scenario F The remote terminal device works in multipath mode, keeping the indirect path unchanged and changing it to a direct path to different cells.
  • a remote terminal device when a remote terminal device performs U2N relay communication through a relay terminal device, if the relay terminal device is in an RRC idle state or an RRC inactive state, it will first initiate an RRC connection establishment or an RRC connection recovery and enter the RRC connection state.
  • the method of triggering the relay terminal device to enter the RRC connection state is that when the relay terminal device receives an RRC message (a message carried by SRB0 or SRB1) sent by the remote terminal device through a specific default configuration (SL-RLC0 or SL-RLC1), it triggers the RRC connection establishment process or the RRC connection recovery process and enters the RRC connection state.
  • the remote terminal device has only a direct path or an indirect path at the same time.
  • the RRC reconfiguration completion message (the message carried by SRB1) can only be forwarded through the relay terminal device. Therefore, when the relay terminal device is in the RRC idle state or the RRC inactive state, receiving the RRC reconfiguration completion message sent by the remote terminal device can trigger the RRC connection establishment process or the RRC connection recovery process of the relay terminal device.
  • the remote terminal device will maintain a direct connection path, and the RRC reconfiguration completion message indicating the completion of adding or changing the relay terminal device can be sent directly through the direct connection path. Therefore, the R17 method cannot be directly used to trigger the relay terminal device to enter the RRC connection state, and thus the multi-path communication function cannot be realized.
  • the remote terminal device is restricted to sending RRC messages carried by SRB1 through an indirect path when a direct path is available, the configuration of the network-side equipment will be severely restricted, which is not conducive to the flexible deployment of the network-side equipment and affects the network performance. If the relay terminal device in the RRC idle state or the RRC inactive state cannot enter the RRC connected state in time, when the remote terminal device needs to send data through multiple paths, it will cause serious delays, affecting the user experience and the performance of multi-path communication.
  • the solution provided by the embodiment of the present disclosure receives the RRC reconfiguration message sent by the network side device; sends a first signaling message to the relay terminal device, the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery, while ensuring the flexible configuration of the network, timely triggering the relay terminal device to enter the RRC connection state, thereby realizing multi-path communication function, reducing end-to-end delay, avoiding service interruption or rate reduction in the scenario of non-direct path change, improving network throughput and reliability, and improving user experience.
  • the following examples are used for illustration:
  • the disclosed embodiment provides a method for triggering a relay terminal device to enter an RRC connection state, which can be executed by any system with computing and processing capabilities.
  • the process corresponding to the method can be executed by a remote terminal device; in another feasible implementation, the process corresponding to the method can be executed by a network side device; in other feasible implementations, the process corresponding to the method can be executed by a relay terminal device.
  • FIG2 shows a flow chart of a method for triggering a relay terminal device to enter an RRC connected state in an embodiment of the present disclosure.
  • the method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure is applied to a remote terminal device and includes the following steps:
  • S202 Receive an RRC reconfiguration message sent by a network side device.
  • the RRC reconfiguration message in S202 may include at least one of the following information: local ID information of the remote terminal device; source layer 2 ID information of the relay terminal device; direct link relay adaptation protocol SRAP configuration information; SRB1 related configuration information; second information element.
  • the remote terminal device can determine the relay terminal device on the indirect path according to the source layer 2 ID information of the relay terminal device indicated by the network side device. It should be noted that in the scenario of changing the indirect path, the above relay terminal device can be the target relay terminal device.
  • the above-mentioned SRB1 related configuration information includes at least one of the following: configuring an independent SRB1 on a direct path and/or an indirect path, configuring an SRB1 supporting separation, and configuring an SRB1 supporting redundant transmission.
  • the second information element is used to indicate that the remote terminal device needs to send a PC5-RRC message to the relay terminal device.
  • the first signaling message may include at least one of a direct link interface PC5-RRC message or an RRC reconfiguration complete message.
  • the PC5-RRC message when the first signaling message includes a PC5-RRC message, the PC5-RRC message includes at least a first information element, and the first information element is used to trigger the relay terminal device to enter the RRC connection state.
  • the PC5-RRC message can be a newly defined message or an existing PC5-RRC message can be reused.
  • the remote terminal device when the first signaling message includes an RRC reconfiguration completion message, the remote terminal device sends the RRC reconfiguration completion message to the network side device through the relay terminal device, and the RRC reconfiguration completion message is sent by the remote terminal device using the default configured direct link - radio link control SL-RLC1.
  • the relay terminal device After the remote terminal device sends the first signaling message to the relay terminal device, the relay terminal device receives the PC5-RRC message sent by the remote terminal device to trigger the relay terminal device to enter the RRC connection state, or the relay terminal device receives the RRC reconfiguration completion message sent by the remote terminal device using a specific SL-RLC1 configuration. If the relay terminal device is in the RRC idle state or the RRC inactive state at this time, the RRC connection establishment or RRC connection recovery process is executed to enter the RRC connection state. That is, the relay terminal device in the RRC idle state executes the RRC connection establishment, and the relay terminal device in the RRC inactive state executes the RRC connection recovery.
  • the relay terminal device receives the RRC reconfiguration completion message sent by the remote terminal device through the SL-RLC configuration, after the relay terminal device enters the RRC connection state, it forwards the RRC reconfiguration completion message sent by the remote terminal device to the network side device.
  • the network side device sends an RRC reconfiguration message to the relay terminal device to instruct the relay terminal device to add a remote terminal device, thereby enabling uplink and downlink multipath transmission between the remote terminal device and the network side device.
  • the solution provided by the embodiment of the present disclosure receives an RRC reconfiguration message sent by a network side device; sends a first signaling message to a relay terminal device, the first signaling message is used to trigger the relay terminal device in an RRC idle state to perform RRC connection establishment or trigger the relay terminal device in an RRC inactive state to perform RRC connection recovery, While ensuring flexible network configuration, the relay terminal device is triggered to enter the RRC connection state in a timely manner, thereby realizing multi-path communication function, reducing end-to-end delay, avoiding service interruption or rate reduction in scenarios where non-direct path changes occur, improving network throughput and reliability, and enhancing user experience.
  • FIG3 shows a flow chart of another method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure.
  • S204 is further refined into S2042 to limit the situation where the first signaling message includes an RRC reconfiguration completion message.
  • the sending of the first signaling message to the relay terminal device in the above S204 includes:
  • the default configured SL-RLC1 is used to send an RRC reconfiguration completion message to the relay terminal device, so that the relay terminal device in the RRC idle state performs relevant operations for establishing the RRC connection or the relay terminal device in the RRC inactive state performs relevant operations for recovering the RRC connection.
  • the relevant configuration information of SRB1 on the above-mentioned non-direct path includes at least one of the following: an independent SRB1 is configured on the non-direct path, an SRB1 supporting separation is configured and the main RLC entity of the separated SRB1 is configured on the non-direct path, and an SRB1 supporting redundant transmission is configured.
  • an independent SRB1 is configured on a non-direct path, or a separated SRB1 is supported and the main RCL entity of the separated SRB1 is configured on a non-direct path, or an SRB1 that supports redundant transmission is configured, it indicates that the default configured SL-RLC1 can be used to send an RRC reconfiguration completion message to the network side device on the non-direct path, thereby triggering the relay terminal device to enter the RRC connected state through the RRC reconfiguration completion message.
  • the default configured SL-RLC1 is used to send an RRC reconfiguration completion message to the relay terminal device, thereby triggering the relay terminal device to enter the RRC connection state through the RRC reconfiguration completion message, realizing multi-path communication, reducing end-to-end delay, and improving system performance and user experience.
  • FIG4 shows a flowchart of another method for triggering a relay terminal device to enter an RRC connection state provided in an embodiment of the present disclosure.
  • S204 is further refined into S2044 to limit the situation where the first signaling message includes a PC5-RRC message.
  • the sending of the first signaling message to the relay terminal device in the above S204 includes at least one of the following:
  • the remote terminal device When SRB1 is not configured on the indirect path in the RRC reconfiguration message, or a separated SRB1 is configured and the primary RLC entity configuration of the separated SRB1 is not configured on the indirect path, the remote terminal device sends a PC5-RRC message to the relay terminal device; or
  • the remote terminal device determines that a PC5-RRC message needs to be sent during the interaction between the remote terminal device and the relay terminal device, the PC5-RRC message is sent to the relay terminal device.
  • the second information element is used to indicate that the remote terminal device needs to send a PC5-RRC message to the relay terminal device.
  • the sending of the first signaling message to the relay terminal device in the above S204 includes: during the direct link discovery process or PC5 connection establishment process between the remote terminal device and the relay terminal device, the remote terminal device obtains the RRC status information of the relay terminal device, and when the RRC status information of the relay terminal device is obtained as an RRC idle state or an RRC inactive state, the PC5-RRC message is sent to the relay terminal device; or during the direct link discovery process or PC5 connection establishment process between the remote terminal device and the relay terminal device, when the relay terminal device indicates that the remote terminal device needs to send a PC5-RRC message, the PC5-RRC message is sent to the relay terminal device.
  • the interactive information in the process adds relevant indication information, such as the RRC status indication information of the relay terminal device, or the information that the relay terminal device indicates that it needs to trigger entering the RRC connection state.
  • the remote terminal device obtains the connection status information of the relay terminal device or an indication of whether a PC5-RRC message needs to be sent to trigger the relay terminal device to enter the RRC connection state, etc.
  • the RRC status information indicated by the relay terminal device is the RRC idle state or the RRC inactive state, or when the relay terminal device indicates that the remote terminal device needs to send a PC5-RRC message
  • the remote terminal device sends a PC5-RRC message, thereby triggering the relay terminal device to perform related operations for entering the RRC connection state.
  • FIG5 shows a flow chart of another method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure. Based on the embodiment of FIG2, S502 is added after S204 to limit the RRC reconfiguration completion message sending method.
  • the method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure includes S202 to S204, and S502. The method includes:
  • S502 Send an RRC reconfiguration completion message to a network side device through a direct path and/or an indirect path.
  • sending the RRC reconfiguration completion message to the network side device through a direct connection path means that the remote terminal device sends the RRC reconfiguration completion message directly to the network side device without relaying the terminal device through a direct link; sending the RRC reconfiguration completion message to the network side device through an indirect connection path means that the remote terminal device sends the RRC reconfiguration completion message to the network side device through a relay terminal device.
  • the above S502 sends the RRC reconfiguration completion message to the network side device through a direct path and/or an indirect path, including at least one of the following:
  • an RRC reconfiguration completion message is sent to the network side device via a direct path and a non-direct path;
  • an RRC reconfiguration completion message is sent to the network side device through the direct path;
  • an RRC reconfiguration completion message is sent to the network side device through the direct path SRB1.
  • the direct path when a remote terminal device needs to send a PC5-RRC message to a relay terminal device, and the direct path is configured with an available SRB1, the direct path is configured with an available SRB1 including at least one of the following: the direct path is configured with an independent SRB1, or the main RLC entity that supports separation of SRB1 is configured and the separation of SRB1 is configured on the direct path.
  • the RRC reconfiguration completion message is sent to the network side device through the direct path and/or the indirect path, thereby realizing multi-path communication, reducing end-to-end delay, and improving system performance and user experience.
  • FIG6 shows a flow chart of a method for triggering a relay terminal device to enter an RRC connection state provided in an embodiment of the present disclosure and applied to a network side device.
  • the method for triggering a relay terminal device to enter an RRC connection state provided in an embodiment of the present disclosure is applied to a network side device, and includes:
  • S602 Send an RRC reconfiguration message to the remote terminal device, so that the remote terminal device sends a first signaling message to the relay terminal device according to the RRC reconfiguration message, the first signaling message is used to trigger the RRC idle state.
  • the relay terminal device in the RRC state performs RRC connection establishment or triggers the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • FIG7 shows a flow chart of a method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure and applied to a relay terminal device.
  • the method for triggering a relay terminal device to enter an RRC connected state provided in an embodiment of the present disclosure is applied to a relay terminal device, and includes:
  • implementation method of the network side device and the relay terminal device can refer to the implementation example of the remote terminal device, which will not be repeated here.
  • the communication system includes a remote terminal device, a relay terminal device and a network side device, wherein the network side device is described by taking a base station as an example.
  • the remote terminal device first works on a direct connection path and then adds a non-direct connection path, that is, scenario A.
  • the processes of embodiments one to four can be used to trigger the relay terminal device to enter the RRC connection state.
  • the remote terminal device first works on the direct path, that is, directly communicates with the base station through the Uu interface; then, under the instruction of the base station, a non-direct path is added to add a path from the relay terminal device to the base station.
  • the relay terminal device selected by the base station is in the RRC idle state or the RRC inactive state, it is necessary to first trigger the relay terminal device to enter the RRC connected state before uplink and downlink multi-path transmission can be achieved.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the base station only configures SRB1 in the direct connection path and instructs the remote terminal device not to send a PC5-RRC message to trigger the target relay terminal device to enter the RRC connection state (that is, the relay terminal device is already in the connection state).
  • the process of triggering the relay terminal device to enter the RRC connection state is as follows:
  • the remote terminal device performs uplink and downlink transmission with the base station via a single path, that is, the remote terminal device and the base station transmit uplink/downlink data via a single path.
  • the single path may be a direct connection path.
  • the remote terminal device performs measurement configuration and measurement reporting according to the network configuration.
  • the base station determines to add a non-direct connection path based on the measurement result reported by the remote terminal device, selects the target relay terminal device, and sends an RRC reconfiguration message to the remote terminal device, wherein the RRC reconfiguration message includes at least one or more of the following information: the local ID of the remote terminal, the source layer 2 L2ID information of the target relay terminal device, the SRAP configuration information, the SRB1 related configuration information, etc., wherein the SRB1 related configuration information is to configure SRB1 only on the direct connection path.
  • the remote terminal device establishes a PC5 connection with the relay terminal device; the remote terminal device reconfigures the content of the RRC message, and at this time, there is no need to send a PC5-RRC message to the target relay terminal device.
  • the base station sends an RRC reconfiguration message to the target relay terminal device, instructing the target relay terminal device to add the remote terminal device.
  • the RRC reconfiguration message received by the target relay terminal device includes at least the following contents: local ID and L2 ID information of the remote terminal device, SRAP related configuration, etc.
  • the remote terminal device determines whether to send the RRC reconfiguration completion message through a direct path or an indirect path according to the content of the RRC reconfiguration message. If the base station does not configure SRB1 on the indirect path, it is sent through the direct path.
  • S804 can be executed before S805 or after S805, depending on the implementation of the terminal device and the network side device.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the base station can configure SRB1 on non-direct paths (such as configuring separate SRB1, SRB1 redundant transmission, or only
  • the remote terminal device triggers the target relay terminal device to enter the RRC connection state by sending an SRB1 message (i.e., RRC reconfiguration completion message) on the indirect path, without sending a PC5-RRC message.
  • SRB1 message i.e., RRC reconfiguration completion message
  • the remote terminal device performs uplink and downlink transmission with the base station via a single path, that is, the remote terminal device and the base station transmit uplink/downlink data via a single path.
  • the single path may be a direct connection path. This step is the same as S801 in the first embodiment.
  • S902 The remote terminal device performs measurement configuration and measurement reporting according to the network configuration. This step is the same as S802 in the first embodiment.
  • the base station determines to add a non-directly connected path based on the measurement results reported by the remote terminal device and selects a target relay terminal device.
  • the base station sends an RRC reconfiguration message to the remote terminal device, wherein the RRC reconfiguration information includes at least one or more of the following information: local ID information of the remote terminal device, L2 ID information of the target relay terminal device, SRAP-related configuration, SRB1-related configuration information, etc., wherein the SRB1-related configuration information is to configure SRB1 on a non-directly connected path.
  • the remote terminal device establishes a PC5 connection with the relay terminal device. At this time, the remote terminal device determines, based on the RRC reconfiguration message, that it is not necessary to send a PC5-RRC message to the target relay terminal device to trigger the target relay terminal device to enter the RRC connection state; the remote terminal device determines, based on the content of the RRC reconfiguration message, to send an RRC reconfiguration completion message through a non-direct connection path; the remote terminal device sends an RRC reconfiguration completion message to the relay terminal device through a specific default configuration (SL-RLC1).
  • SL-RLC1 specific default configuration
  • the relay terminal device receives an RRC message sent by the remote terminal device through a specific default configuration (SL-RLC1), if the relay terminal device is not in the RRC connected state at this time, then execute the relevant operation to enter the RRC connected state. If the relay terminal device is in the RRC idle state at this time, then execute the RRC connection establishment process; if the relay terminal device is in the RRC inactive state at this time, then execute the RRC connection recovery process.
  • SL-RLC1 specific default configuration
  • the base station sends an RRC reconfiguration message to the target relay terminal device, instructing the target relay terminal device to add the remote terminal device.
  • the RRC reconfiguration message received by the target relay terminal device contains at least the following contents: local ID and L2 ID information of the remote terminal device, SRAP related configuration, etc.
  • the relay terminal device sends the RRC message (ie, the RRC reconfiguration completion message) sent by the remote terminal device to the base station according to the base station configuration.
  • the RRC message ie, the RRC reconfiguration completion message
  • the base station adds a second information element in the RRC reconfiguration message to instruct the remote terminal device to send a PC5-RRC message to trigger the target relay terminal device to enter the RRC connection state.
  • the process of triggering the relay terminal device to enter the RRC connection state is as follows:
  • S1001-S1002 are the same as S801-S802 in the first embodiment, and are not described in detail here.
  • the base station determines to add a non-directly connected path and selects a target relay terminal device based on the measurement results reported by the remote terminal device.
  • the base station sends an RRC reconfiguration message to the remote terminal device.
  • the RRC reconfiguration message includes at least one or more of the following information: local ID information of the remote terminal device, L2ID information of the target relay terminal device, SRAP-related configuration, and a second information element.
  • the second information element is used to indicate that the remote terminal device needs to send a PC5-RRC message to the relay terminal device, thereby triggering the relay terminal device to enter an RRC connected state.
  • the remote terminal device establishes a PC5 connection with the relay terminal device; the remote terminal device determines, based on the second information element in the RRC reconfiguration message, that it needs to send a PC5-RRC message to the target relay terminal device to trigger the target relay terminal device to enter the RRC connection state.
  • the remote terminal device sends a PC5-RRC message to the relay terminal device.
  • the PC5-RRC message includes at least a first information element, which is used to trigger the relay terminal device to enter an RRC connection state.
  • the relay terminal device receives the PC5-RRC message sent by the remote terminal device. If the relay terminal device is not in the RRC connection state at this time, it performs relevant operations according to the first information element to enter the RRC connection state. If the relay terminal device is in the RRC idle state at this time, the RRC connection establishment process is executed; if the relay terminal device is in the RRC inactive state at this time, the RRC connection recovery process is executed.
  • the base station sends an RRC reconfiguration message to the target relay terminal device, instructing the target relay terminal device to add a remote terminal device;
  • the message content includes at least the following: local ID and L2 ID information of the remote terminal device, SRAP related configuration, etc.
  • the remote terminal device sends an RRC reconfiguration completion message to the base station through a direct path (or an indirect path) according to the base station configuration.
  • S1008 has nothing to do with the execution order of S1004 to S1007, and only needs to be executed after S1003, which depends on the implementation of the terminal device.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the remote terminal device autonomously determines to send a PC5-RRC message to trigger the target relay terminal device to enter the RRC connection state based on the implementation or the relevant indication information obtained during the interaction with the relay terminal device.
  • a method for triggering a relay terminal device to enter the RRC connection state includes the following steps:
  • S1101-S1102 are the same as S801-S802 in the first embodiment, and will not be described in detail here.
  • the base station determines to add a non-direct connection path and selects a target relay terminal device based on the measurement results reported by the remote terminal device.
  • the base station sends an RRC reconfiguration message to the remote terminal device.
  • the RRC reconfiguration message includes at least one or more of the following information: local ID information of the remote terminal device, L2ID information of the target relay terminal device, and SRAP-related configuration.
  • the remote terminal device establishes a PC5 connection with the relay terminal device, and obtains relevant indication information during the interaction process, such as the RRC status indication information of the relay terminal device, or the information of the relay terminal device indicating that it needs to be triggered to enter the RRC connection state; the remote terminal device determines, based on the relevant indication information, that it needs to send a PC5-RRC message to the target relay terminal device to trigger the target relay terminal device to enter the RRC connection state.
  • S1105 ⁇ S1108 are the same as S1005 ⁇ S1008 in the third embodiment.
  • S1108 has no sequential relationship with S1104 to S1107 and can be performed after S1003, depending on the implementation of the terminal device.
  • the remote terminal device works in multi-path mode, keeping the direct path unchanged and changing the indirect path, that is, reselecting a new relay terminal device.
  • the remote terminal device in multipath mode, works in multipath mode, and then changes the non-direct path under the instruction of the base station and selects a new relay terminal device.
  • the relay terminal device selected by the base station is in the RRC idle state or the RRC inactive state, it is necessary to first trigger the relay terminal device to enter the RRC connected state before uplink and downlink multipath transmission can be achieved.
  • the processes of embodiments 5 to 8 can be used for implementation.
  • a method for triggering a relay terminal device to enter the RRC connection state includes the following steps:
  • the remote terminal device performs uplink and downlink multipath transmission with the base station.
  • the remote terminal device performs measurement and reporting according to the network configuration.
  • the base station determines to change the non-direct connection path based on the measurement results reported by the terminal device and selects the target relay terminal device.
  • the base station sends an RRC reconfiguration message to the remote terminal device, which includes at least one or more of the following information: local ID information of the remote terminal device (if update is required), L2 ID information of the target relay terminal device, SRAP related configuration (only SRB1 is configured on the direct connection path), etc.
  • the remote terminal device establishes a PC5 connection with the target relay terminal device; the remote terminal device determines that it does not need to send a PC5-RRC message to the target relay terminal device according to the content of the RRC reconfiguration message, so as to trigger The relay terminal device enters the RRC connected state.
  • the base station sends an RRC reconfiguration message to the target relay terminal device, instructing the target relay terminal device to add a remote terminal device;
  • the message content includes at least the following: local ID information and L2 ID information of the remote terminal device, SRAP related configuration, etc.
  • the remote terminal device determines whether to send the RRC reconfiguration completion message through a direct path or an indirect path according to the content of the RRC reconfiguration message. If the base station does not configure SRB1 on the indirect path, it is sent through the direct path.
  • the base station sends an RRC reconfiguration message to the source relay terminal device, instructing the source relay terminal device to release the remote terminal device.
  • steps S1204 and S1205 are not sequentially associated and depend on the implementation of the terminal device and the network side device.
  • the base station configures SRB1 on a non-direct path (such as configuring separate SRB1, SRB1 redundant transmission, or configuring SRB1 only on a non-direct path, etc.), instructs the remote terminal device not to send a PC5-RRC message, and triggers the target relay terminal device to enter the RRC connection state by sending an SRB1 message (i.e., an RRC reconfiguration completion message) on the non-direct path.
  • a method for triggering a relay terminal device to enter the RRC connection state includes the following steps:
  • S1301-S1302 are the same as S1201-S1202 in the fifth embodiment.
  • the base station determines to change the non-direct path based on the measurement results reported by the terminal device and selects the target relay terminal device.
  • the base station sends an RRC reconfiguration message to the remote terminal device.
  • the RRC reconfiguration message includes at least one or more of the following information: local ID information of the remote terminal device (if update is required), L2 ID information of the target relay terminal device, SRAP related configuration (including configuration of SRB1 on the non-direct path), etc.
  • the remote terminal device establishes a PC5 connection with the target relay terminal device; the remote terminal device determines, based on the content of the RRC reconfiguration message, that it is not necessary to send a PC5-RRC message to the target relay terminal device to trigger the target relay terminal device to enter the RRC connection state; the remote terminal device determines, based on the content of the RRC reconfiguration message, that it is necessary to send an RRC reconfiguration completion message through a non-direct connection path; the remote terminal device sends an RRC reconfiguration completion message to the target relay terminal device through a specific default configuration (SL-RLC1).
  • SL-RLC1 specific default configuration
  • the target relay terminal device receives an RRC message sent by the remote terminal device through a specific default configuration (SL-RLC1), if the relay terminal device is not in the RRC connected state at this time, it performs relevant operations to enter the RRC connected state. If the relay terminal device is in the RRC idle state at this time, it performs the RRC connection establishment process; if the relay terminal device is in the RRC inactive state at this time, it performs the RRC connection recovery process.
  • SL-RLC1 specific default configuration
  • the base station sends an RRC reconfiguration message to the target relay terminal device, instructing the target relay terminal device to add a remote terminal device;
  • the message content includes at least the following: local ID information and L2 ID information of the remote terminal device, SRAP related configuration, etc.
  • the target relay terminal device sends the RRC message (ie, the RRC reconfiguration completion message) sent by the remote terminal device to the base station according to the base station configuration.
  • the RRC message ie, the RRC reconfiguration completion message
  • S1308 to S1310 are the same as S1207 to S1209 in the fifth embodiment and will not be described in detail.
  • the base station adds direct indication information to the RRC reconfiguration message to instruct the remote terminal device to send a PC5-RRC message to trigger the target relay terminal device to enter the RRC connection state.
  • a method for triggering a relay terminal device to enter the RRC connection state includes the following steps:
  • S1401-S1402 are the same as S1201-S1202 in the fifth embodiment and will not be described in detail.
  • the base station determines to change the non-direct connection path according to the measurement result reported by the terminal device, and selects a target relay terminal device; the base station sends an RRC reconfiguration message to the remote terminal device, and the RRC reconfiguration message includes at least Contains one or more of the following information: local ID information of the remote terminal device (if updated), L2 ID information of the target relay terminal device, SRAP related configuration, and a second information element, wherein the second information element is used to instruct the remote terminal device to send a PC5-RRC message to the relay terminal device to trigger the target relay terminal device to enter the RRC connected state.
  • the remote terminal device establishes a PC5 connection with the target relay terminal device; the remote terminal device determines, based on the second information element in the RRC reconfiguration message, that a PC5-RRC message needs to be sent to the target relay terminal device to trigger the target relay terminal device to enter the RRC connection state.
  • the remote terminal device sends a PC5-RRC message to the target relay terminal device.
  • the PC5-RRC message includes at least a first information element, and the first information element is used to trigger the relay terminal device to enter an RRC connection state.
  • the target relay terminal device receives the PC5-RRC message sent by the remote terminal device. If the relay terminal device is not in the RRC connected state at this time, then according to the first information element, it performs relevant operations to enter the RRC connected state: if the relay terminal device is in the RRC idle state at this time, then it executes the RRC connection establishment process; if the relay terminal device is in the RRC inactive state at this time, then it executes the RRC connection recovery process.
  • the base station sends an RRC reconfiguration message to the target relay terminal device, instructing the target relay terminal device to add a remote terminal device;
  • the message content includes at least the following: local ID and L2 ID information of the remote terminal device, SRAP related configuration, etc.
  • the remote terminal device sends an RRC reconfiguration completion message to the base station through a direct path (or an indirect path) according to the base station configuration.
  • S1409 to S1411 are the same as S1207 to S1209 in the fifth embodiment and will not be described in detail.
  • S1408 has no sequential relationship with S1404 to S1407, and can be performed after S1403, which depends on the implementation of the terminal device.
  • the remote terminal device autonomously determines to send a PC5-RRC message to trigger the target relay terminal device to enter the RRC connection state based on the implementation or the relevant indication information obtained during the interaction with the target relay terminal device.
  • a method for triggering a relay terminal device to enter the RRC connection state includes the following steps:
  • S1501-S1502 are the same as S1201-S1202 in the fifth embodiment and will not be described in detail.
  • the base station determines to change the non-direct connection path based on the measurement results reported by the terminal device and selects the target relay terminal device.
  • the base station sends an RRC reconfiguration message to the remote terminal device.
  • the RRC reconfiguration message includes at least one or more of the following information: local ID information of the remote terminal device (if update is required), L2 ID information of the target relay terminal device, SRAP related configuration, etc.
  • the remote terminal device establishes a PC5 connection with the target relay terminal device, and obtains relevant indication information during the interaction process, such as the RRC status indication information of the target relay terminal device, or the information indicating that the target relay terminal device needs to be triggered to enter the RRC connection state; the remote terminal device determines, based on the relevant indication information, that it needs to send a PC5-RRC message to the target relay terminal device to trigger the target relay terminal device to enter the RRC connection state.
  • relevant indication information such as the RRC status indication information of the target relay terminal device, or the information indicating that the target relay terminal device needs to be triggered to enter the RRC connection state
  • S1505-S1511 are the same as S1405-S1411 in Embodiment 7 and will not be described in detail.
  • S1508 has no sequential relationship with S1504 to S1507, and can be performed after S1503, depending on the implementation of the terminal device.
  • the embodiments of the present disclosure also provide a remote terminal device, a relay terminal device, a communication system and other related devices, as described in the following embodiments. Since the principle of solving the problem in the related device embodiment is similar to that in the above method embodiment, the implementation of the related device embodiment can refer to the implementation of the above method embodiment, and the repeated parts will not be repeated.
  • FIG16 shows a schematic diagram of the structure of a remote terminal device in an embodiment of the present disclosure.
  • the remote terminal device provided in an embodiment of the present disclosure includes: a configuration message receiving module 1610 and a signaling message sending module 1620 .
  • the configuration message receiving module 1610 is used to receive an RRC reconfiguration message sent by a network side device
  • the signaling message sending module 1620 is used to send a first signaling message to the relay terminal device, wherein the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • the first signaling message includes at least one of a direct link interface PC5-RRC message or an RRC reconfiguration completion message; wherein, when the first signaling message includes a PC5-RRC message, the PC5-RRC message includes at least a first information element, and the first information element is used to trigger the relay terminal device to enter the RRC connection state; when the first signaling message includes an RRC reconfiguration completion message, the remote terminal device sends an RRC reconfiguration completion message to the network side device through the relay terminal device, and the RRC reconfiguration completion message is sent by the remote terminal device using the default configured direct link-radio link control SL-RLC1.
  • the signaling message sending module 1620 is used to send an RRC reconfiguration completion message to a relay terminal device using the default configured SL-RLC1 when the RRC reconfiguration message contains relevant configuration information of SRB1 on a non-direct path, so that the relay terminal device in the RRC idle state performs relevant operations for establishing an RRC connection or the relay terminal device in the RRC inactive state performs relevant operations for recovering an RRC connection.
  • the relevant configuration information of SRB1 on the indirect path includes at least one of the following: an independent SRB1 is configured on the indirect path, a SRB1 supporting separation is configured and the main RLC entity of the separated SRB1 is configured on the indirect path, and a SRB1 supporting redundant transmission is configured.
  • the signaling message sending module 1620 is used to send a PC5-RRC message to a relay terminal device when the RRC reconfiguration message includes a second information element; or when SRB1 is not configured on a non-direct path in the RRC reconfiguration message, or a separated SRB1 is configured and the main RLC entity configuration of the separated SRB1 is not configured on a non-direct path, the remote terminal device sends a PC5-RRC message to the relay terminal device; or when the remote terminal device determines that a PC5-RRC message needs to be sent during the interaction with the relay terminal device, the PC5-RRC message is sent to the relay terminal device.
  • the second information element is used to indicate that the remote terminal device needs to send a PC5-RRC message to the relay terminal device.
  • the signaling message sending module 1620 is used to send a PC5-RRC message to the relay terminal device when the remote terminal device obtains the RRC status information of the relay terminal device during the direct link discovery process or PC5 connection establishment process between the remote terminal device and the relay terminal device, and the RRC status information of the relay terminal device is an RRC idle state or an RRC inactive state; or when the relay terminal device indicates that the remote terminal device needs to send a PC5-RRC message during the direct link discovery process or PC5 connection establishment process between the remote terminal device and the relay terminal device, the PC5-RRC message is sent to the relay terminal device.
  • the remote terminal device also includes a configuration message completion sending module not shown in the accompanying drawings, which is used to send an RRC reconfiguration completion message to the network side device via a direct path and/or an indirect path.
  • a configuration message completion sending module is used to send an RRC reconfiguration completion message to a network side device through a direct path and an indirect path when a separated SRB1 supporting redundant transmission is configured in the RRC reconfiguration message; when the RRC reconfiguration message is configured with support for separated SRB1 and the main RLC entity of the separated SRB1 is configured on a direct path, or an independent SRB1 is configured on the direct path, an RRC reconfiguration completion message is sent to the network side device through a direct path; when a remote terminal device needs to send a PC5-RRC message to a relay terminal device and an available SRB1 is configured on the direct path, an RRC reconfiguration completion message is sent to the network side device through the direct path SRB1.
  • the direct path is configured with an available SRB1
  • the direct path is configured with an available SRB1, including at least one of the following: the direct path is configured with an independent SRB1, or the main RLC entity that supports separation of SRB1 is configured and the separation of SRB1 is configured on the direct path.
  • the RRC reconfiguration message includes at least one of the following information: local ID information of the remote terminal device; source layer 2 ID information of the relay terminal device; direct link relay adaptation protocol SRAP configuration information; SRB1 related configuration information, SRB1 related configuration information includes at least one of the following: configuring an independent SRB1 on a direct path and/or a non-direct path, configuring SRB1 that supports separation, and configuring SRB1 that supports redundant transmission; a second information element, used to indicate that the remote terminal device needs to send a PC5-RRC message to the relay terminal device.
  • an RRC reconfiguration message sent by a network side device is received; and a first signaling message is sent to a relay terminal device, wherein the first signaling message is used to trigger a relay terminal device in an RRC idle state to execute RRC connection establishment or to trigger a relay terminal device in an RRC inactive state to execute RRC connection recovery, thereby timely triggering the relay terminal device to enter an RRC connection state while ensuring flexible network configuration, thereby realizing a multi-path communication function, reducing end-to-end delay, avoiding service interruption or rate reduction in a non-direct path change scenario, improving network throughput and reliability, and improving user experience.
  • Fig. 17 shows a schematic diagram of the structure of a network side device provided in an embodiment of the present disclosure.
  • the network side device provided in an embodiment of the present disclosure includes a configuration message sending module 1710, which is used to send an RRC reconfiguration message to a remote terminal device, so that the remote terminal device sends a first signaling message to the relay terminal device according to the RRC reconfiguration message, and the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • a configuration message sending module 1710 which is used to send an RRC reconfiguration message to a remote terminal device, so that the remote terminal device sends a first signaling message to the relay terminal device according to the RRC reconfiguration message, and the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • FIG18 is a schematic diagram of the structure of a relay terminal device provided in an embodiment of the present disclosure.
  • the relay terminal device provided in an embodiment of the present disclosure includes a signaling message receiving module 1810 for receiving a first signaling message sent by a remote terminal device; an RRC connection module 1820 for performing an RRC connection establishment operation when the relay terminal device is in an RRC idle state; and performing an RRC connection recovery operation when the relay terminal device is in an RRC inactive state.
  • the embodiment of the present disclosure further provides a communication system, including a network side device, a relay terminal device and a remote terminal device, wherein the network side device is used to send an RRC reconfiguration message to the remote terminal device; the remote terminal device is used to receive the radio resource control RRC reconfiguration message sent by the network side device; send a first signaling message to the relay terminal device, the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • a communication system including a network side device, a relay terminal device and a remote terminal device, wherein the network side device is used to send an RRC reconfiguration message to the remote terminal device; the remote terminal device is used to receive the radio resource control RRC reconfiguration message sent by the network side device; send a first signaling message to the relay terminal device, the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the R
  • the remote terminal device is based on the RRC reconfiguration message; the relay terminal device is used to receive the first signaling message sent by the remote terminal device; when the relay terminal device is in the RRC idle state, perform the RRC connection establishment operation; when the relay terminal device is in the RRC inactive state, perform the RRC connection recovery operation.
  • the electronic device 1900 according to this embodiment of the present invention is described below with reference to Fig. 19.
  • the electronic device 1900 shown in Fig. 19 is only an example and should not bring any limitation to the functions and scope of use of the embodiment of the present invention.
  • the electronic device 1900 is presented in the form of a general-purpose computing device.
  • the components of the electronic device 1900 may include, but are not limited to: the at least one processing unit 1910, the at least one storage unit 1920, and a bus 1930 connecting different system components (including the storage unit 1920 and the processing unit 1910).
  • the storage unit stores a program code, and the program code can be executed by the processing unit 1910, so that the processing unit 1910 performs the steps of various exemplary embodiments of the present invention described in the above "Exemplary Method" section of this specification.
  • the processing unit 1910 can perform the steps of receiving a radio resource control RRC reconfiguration message sent by a network side device as shown in Figure 2; sending a first signaling message to a relay terminal device, the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform an RRC connection establishment; Establish or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • processing unit 1910 can execute sending an RRC reconfiguration message to the remote terminal device as shown in Figure 6, so that the remote terminal device sends a first signaling message to the relay terminal device according to the RRC reconfiguration message, and the first signaling message is used to trigger the relay terminal device in the RRC idle state to perform RRC connection establishment or trigger the relay terminal device in the RRC inactive state to perform RRC connection recovery.
  • processing unit 1910 can execute the first signaling message sent by the remote terminal device as shown in Figure 7; when the relay terminal device is in the RRC idle state, perform the RRC connection establishment operation; when the relay terminal device is in the RRC inactive state, perform the RRC connection recovery operation.
  • the storage unit 1920 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 19201 and/or a cache storage unit 19202 , and may further include a read-only storage unit (ROM) 19203 .
  • RAM random access storage unit
  • ROM read-only storage unit
  • the storage unit 1920 may also include a program/utility 19204 having a set (at least one) of program modules 19205, such program modules 19205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.
  • program modules 19205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.
  • Bus 1930 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.
  • the electronic device 1900 may also communicate with one or more external devices 1940 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the system, and/or may communicate with any device that enables the electronic device 1900 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input/output (I/O) interface 1950.
  • the system may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and/or a public network, such as the Internet) via a network adapter 1960. As shown in FIG.
  • the network adapter 1960 communicates with other modules of the electronic device 1900 via a bus 1930.
  • a bus 1930 may be used in conjunction with the electronic device 1900, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
  • the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.
  • a non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computing device which can be a personal computer, a server, a terminal device, or a network device, etc.
  • the process described in the above reference flowchart can be implemented as a computer program product, which includes: a computer program, which implements the above-mentioned method of triggering the relay terminal device to enter the RRC connected state when the computer program is executed by a processor.
  • a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored.
  • various aspects of the present invention can also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary embodiments of the present invention described in the above "Exemplary Method" section of the present specification.
  • a program product for implementing the above method according to an embodiment of the present invention is described, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer.
  • the program product of the present invention is not limited thereto.
  • the readable storage medium can be any A tangible medium containing or storing a program that can be used by or in connection with an instruction execution system, apparatus, or device.
  • the program product may use any combination of one or more readable media.
  • the readable medium may be a readable signal medium or a readable storage medium.
  • the readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.
  • Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.
  • the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the implementation of the present disclosure.
  • a non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computing device which can be a personal computer, a server, a mobile terminal, or a network device, etc.

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Abstract

一种触发中继终端设备进入RRC连接态的方法包括：接收网络侧设备发送的无线资源控制RRC重配置消息；向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复，本公开在保证网络灵活配置的同时，及时触发中继终端设备进入RRC连接态，从而实现多路径通信功能，减少端对端时延，避免非直连路径改变场景下的业务中断或速率降低的问题，提升网络吞吐量和可靠性，提升用户体验。 (图2)

Description

触发中继终端设备进入RRC连接态的方法及相关设备
本公开基于申请号为202310738179.X、申请日为2023年06月20日、发明名称为《触发中继终端设备进入连接态的方法及相关设备》的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本公开作为参考。
技术领域
本公开涉及无线通信技术领域，尤其涉及一种触发中继终端设备进入RRC连接态的方法、远端终端设备、网络侧设备、中继终端设备、通信系统、电子设备、计算机可读存储介质及计算机程序。
背景技术
3GPP在R16版本引入了NR sidelink(直通链路)技术，主要实现V2X相关的道路安全业务。在此基础上，为了进一步扩展网络和直通链路的覆盖，提升功率效率，3GPP在R17开展了基于NR直通链路的中继技术(NR sidelink Relay)研究，引入了UE-to-Network Relay(U2N Relay)技术，远端终端设备可以通过中继终端设备实现与基站的通信。当远端终端设备与基站间的链路质量变差时，远端终端设备可以选择合适的中继终端设备，通过UE-to-Network中继技术保证业务的连续性。
在相关技术中，当远端终端设备通过中继终端设备进行U2N中继通信时，如果中继终端设备处于无线资源控制(Radio Resourse Control，RRC)空闲态(RRC_IDLE)或RRC非激活态(RRC_INACTIVE)，会先发起RRC连接建立(RRC connectionestablishment)或RRC连接恢复(RRC connection resume)，进入到RRC连接态(RRC_CONNECTED)。然而，对于多路径中继场景下的路径管理场景，涉及到中继终端设备的添加或改变，当新添加或改变的中继终端设备此时处于RRC空闲态或RRC非激活态时，如何触发中继终端设备进入RRC连接态成为亟待解决的技术问题。
发明内容
本公开提供一种触发中继终端设备进入RRC连接态的方法及相关设备，至少在一定程度上克服现有的多路径中继场景下如何触发中继终端设备进入RRC连接态的问题。
根据本公开的一个方面，提供一种触发中继终端设备进入RRC连接态的方法，应用于远端终端设备，所述方法包括：接收网络侧设备发送的无线资源控制RRC重配置消息；向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
在本公开的一个实施例中，所述第一信令消息包括直通链路接口PC5-RRC消息或RRC重配置完成消息中的至少一种；其中，当所述第一信令消息包括PC5-RRC消息时，所述PC5-RRC消息中至少包括第一信元，所述第一信元用于触发中继终端设备进入RRC连接态；当所述第一信令消息包括RRC重配置完成消息时，所述远端终端设备通过中继终端设备向网络侧设备发送RRC重配置完成消息，所述RRC重配置完成消息由所述远端终端设备使用缺省配置的直通链路-无线链路控制SL-RLC1发送。
在本公开的一个实施例中，当所述第一信令消息包括RRC重配置完成消息时， 所述向中继终端设备发送第一信令消息，包括：当RRC重配置消息中包含非直连路径上信令无线承载SRB1的相关配置信息时，使用缺省配置的SL-RLC1向中继终端设备发送所述RRC重配置完成消息，以使处于RRC空闲态的中继终端设备执行RRC连接建立的相关操作或处于RRC非激活态的中继终端设备执行RRC连接恢复的相关操作。
在本公开的一个实施例中，所述非直连路径上SRB1的相关配置信息包括以下至少一种：在非直连路径上配置了独立的SRB1、配置了支持分离的SRB1且分离的SRB1的主RLC实体配置在非直连路径、配置了支持冗余传输的SRB1。
在本公开的一个实施例中，当所述第一信令消息包括PC5-RRC消息时，所述向中继终端设备发送第一信令消息，包括以下至少一种：当RRC重配置消息包含第二信元时，向中继终端设备发送PC5-RRC消息；或当RRC重配置消息中未在非直连路径上配置SRB1、或配置了分离的SRB1且分离的SRB1的主RLC实体配置未配置在非直连路径上时，远端终端设备向中继终端设备发送PC5-RRC消息；或当远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，向中继终端设备发送PC5-RRC消息。
在本公开的一个实施例中，当RRC重配置消息包含第二信元时，所述第二信元用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
在本公开的一个实施例中，当所述远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，所述向中继终端设备发送第一信令消息，包括以下至少一种：在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，所述远端终端设备获得中继终端设备的RRC状态信息，所述获得中继终端设备的RRC状态信息为RRC空闲态或RRC非激活态时，向所述中继终端设备发送PC5-RRC消息；或在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，所述中继终端设备指示远端终端设备需要发送PC5-RRC消息时，向所述中继终端设备发送PC5-RRC消息。
在本公开的一个实施例中，所述方法还包括：通过直连路径和/或非直连路径向所述网络侧设备发送RRC重配置完成消息。
在本公开的一个实施例中，所述通过直连路径和/或非直连路径向所述网络侧设备发送RRC重配置完成消息，包括以下至少一种：当RRC重配置消息中配置了支持冗余传输的分离SRB1，通过直连路径和非直连路径向所述网络侧设备发送RRC重配置完成消息；当RRC重配置消息中配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径，或在直连路径上配置了独立的SRB1，通过所述直连路径向所述网络侧设备发送RRC重配置完成消息；当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，通过所述直连路径SRB1向所述网络侧设备发送RRC重配置完成消息。
在本公开的一个实施例中，当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，所述直连路径配置了可用的SRB1包括以下至少一种：所述直连路径配置了独立的SRB1、或配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径。
在本公开的一个实施例中，所述RRC重配置消息包括以下中至少一种信息：远端终端设备的本地ID信息；中继终端设备的源层二ID信息；直通链路中继适配协议SRAP配置信息；SRB1相关配置信息，所述SRB1相关配置信息包括以下至少一种：在直连路径和/或非直连路径上配置独立SRB1、配置支持分离的SRB1、配置支持冗余传输的SRB1；第二信元，用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
根据本公开的另一个方面，提供一种触发中继终端设备进入RRC连接态的方法，应用于网络侧设备，所述方法包括：向远端终端设备发送RRC重配置消息，以使所述远端终端设备根据所述RRC重配置消息，向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
根据本公开的另一个方面，提供一种触发中继终端设备进入RRC连接态的方法，应用于中继终端设备，所述方法包括：接收远端终端设备发送的第一信令消息；当所述中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当所述中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
根据本公开的另一个方面，提供一种远端终端设备，包括：配置消息接收模块，用于接收网络侧设备发送的RRC重配置消息；信令消息发送模块，用于向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
根据本公开的另一个方面，提供一种网络侧设备，包括：配置消息发送模块，用于向远端终端设备发送RRC重配置消息，以使所述远端终端设备根据所述RRC重配置消息，向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
根据本公开的另一个方面，提供一种中继终端设备，包括：信令消息接收模块，用于接收远端终端设备发送的第一信令消息；RRC连接模块，用于当所述中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当所述中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
根据本公开的另一个方面，提供一种通信系统，包括网络侧设备、中继终端设备和远端终端设备，其中，所述网络侧设备，用于向远端终端设备发送RRC重配置消息；所述远端终端设备，用于接收网络侧设备发送的无线资源控制RRC重配置消息；向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复；所述中继终端设备，用于接收远端终端设备发送的第一信令消息；当所述中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当所述中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
根据本公开的另一个方面，提供一种电子设备，包括：处理器；以及存储器，用于存储所述处理器的可执行指令；其中，所述处理器配置为经由执行所述可执行指令来执行上述的触发中继终端设备进入RRC连接态的方法。
根据本公开的另一个方面，提供了一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述的触发中继终端设备进入RRC连接态的方法。
根据本公开的另一个方面，提供了一种计算机程序产品，包括可执行指令，该可执行指令存储在计算机可读存储介质中，电子设备的处理器从计算机可读存储介质读取该可执行指令，处理器执行该可执行指令，使得该电子设备执行上述的触发中继终端设备进入RRC连接态的方法。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施 例，并与说明书一起用于解释本公开的原理。显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1示出本公开实施例中一种触发中继终端设备进入RRC连接态的方法的示例性系统架构的示意图。
图2示出本公开实施例中提供的一种触发中继终端设备进入RRC连接态的方法流程图。
图3示出本公开实施例中提供的另一种触发中继终端设备进入RRC连接态的方法流程图。
图4示出本公开实施例中提供的又一种触发中继终端设备进入RRC连接态的方法流程图。
图5示出本公开实施例中提供的再一种触发中继终端设备进入RRC连接态的方法流程图。
图6示出本公开实施例中提供的应用于网络侧设备的触发中继终端设备进入RRC连接态的方法流程图。
图7示出本公开实施例中提供的应用于中继终端设备的触发中继终端设备进入RRC连接态的方法流程图。
图8示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第一种示例的交互图。
图9示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第二种示例的交互图。
图10示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第三种示例的交互图。
图11示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第四种示例的交互图。
图12示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第五种示例的交互图。
图13示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第六种示例的交互图。
图14示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第七种示例的交互图。
图15示出本公开实施例中提供的触发中继终端设备进入RRC连接态的第八种示例的交互图。
图16示出本公开实施例中提供的一种远端终端设备的结构示意图。
图17示出本公开实施例中提供的一种网络侧设备的结构示意图。
图18示出本公开实施例中提供的一种中继终端设备的结构示意图。
图19示出本公开实施例中一种电子设备的结构框图。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施方式使得本公开将更加全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施方式中。
此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。附图中所示的一些方框 图是功能实体，不一定必须与物理或逻辑上独立的实体相对应。可以采用软件形式来实现这些功能实体，或在一个或多个硬件模块或集成电路中实现这些功能实体，或在不同网络和/或处理器装置和/或微控制器装置中实现这些功能实体。
图1示出了可以应用于本公开实施例的触发中继终端设备进入RRC连接态的方法或触发中继终端设备进入RRC连接态的装置的示例性系统架构的示意图。
如图1所示，系统架构100可以包括远端终端设备101，中继终端设备102和网络侧设备103。
网络可以以在远端终端设备101和中继终端设备102、远端终端设备101和网络侧设备103之间提供通信链路的介质，可以是有线网络，也可以是无线网络。
用户可以使用远端终端设备101通过网络与网络侧设备103交互，以接收或发送消息。用户也可以使用远端终端设备101通过中继终端设备102与网络侧设备103进行交互，以接收或发送消息。
在一个实施例中，上述的无线网络使用标准通信技术和/或协议。无线网络通常为因特网、但也可以是任何网络，包括但不限于局域网(Local Area Network，LAN)、城域网(Metropolitan Area Network，MAN)、广域网(Wide Area Network，WAN)、移动、有线或者无线网络、专用网络或者虚拟专用网络的任何组合。在一些实施例中，使用包括超文本标记语言(Hyper Text Mark-up Language，HTML)、可扩展标记语言(Extensible Markup Language，XML)等的技术和/或格式来代表通过网络交换的数据。此外还可以使用诸如安全套接字层(Secure Socket Layer，SSL)、传输层安全(TransportLayer Security，TLS)、虚拟专用网络(Virtual Private Network，VPN)、网际协议安全(Internet Protocol Security，IPsec)等常规加密技术来加密所有或者一些链路。在另一些实施例中，还可以使用定制和/或专用数据通信技术取代或者补充上述数据通信技术。
可以理解的是，对于无线通信系统，其是一种提供无线通信功能的网络。通信系统可以采用不同的通信技术，例如码分多址(Code Division Multiple Access，CDMA)、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency DivisionMultiple Access，FDMA)、正交频分多址(Orthogonal Frequency-division MultipleAccess，OFDMA)、单载波频分多址(Single Carrier FDMA，SC-FDMA)、载波侦听多路访问/冲突避免(Carrier Sense Multiple Access with Collision Avoidance)。根据不同网络的容量、速率、时延等因素可以将网络分为2G(generation)网络、3G网络、4G网络、5G网络或者未来演进网络，如5G-A网络，6G网络，简称为网络或系统。本公开中，网络侧设备103可以成为基站。无线接入网可以通过基站为终端设备提供网络服务，不同的运营商可以为终端设备提供不同的网络服务，也可以理解为不同的运营商对应有不同的运营商网络。
远端终端设备(User Equipment，UE)101和中继终端设备102可以是各种电子设备，又称用户设备、终端等，包括但不限于智能手机、平板电脑、膝上型便携计算机、台式计算机、可穿戴设备、增强现实设备、虚拟现实设备等。
在一个实施例中，不同的远端终端设备101、中继终端设备102中安装的应用程序的客户端是相同的，或基于不同操作系统的同一类型应用程序的客户端。基于终端平台的不同，该应用程序的客户端的具体形态也可以不同，比如，该应用程序客户端可以是手机客户端、PC客户端等。
本领域技术人员可以知晓，图1中的远端终端设备101、中继终端设备102和网络侧设备103的数量仅仅是示意性的，根据实际需要，可以具有任意数目的远端终端设备、中继终端设备和网络侧设备。本公开实施例对此不作限定。
远端终端设备101可以通过Uu接口与基站之间直接通信，称为直连路径；远端终端设备101可以通过与中继终端设备102之间的PC5接口和中继终端设备102与网络侧设备103之间的Uu接口与网络侧设备103进行通信，称为非直连路径。
在R17中，终端设备可以通过直连路径或非直连路径实现与网络侧的通信，但不支持终端设备同时通过直连路径和非直连路径通信，即不支持多路径中继通信技术(multi-path Relay)。
为了进一步提升网络吞吐量和可靠性，3GPP在R18 Sidelink Relay增强项目中引入了Multi-Path Relay技术，并支持以下的路径管理场景。
场景A：远端终端设备先工作在直连路径，再添加非直连路径；
场景B：远端终端设备先工作在非直连路径，再添加直连路径；
场景C：远端终端设备先工作在多路径模式，再删除非直连路径；
场景D：远端终端设备先工作在多路径模式，再删除直连路径；
场景E：远端终端设备工作在多路径模式，保持直连路径不变，改变非直连路径(重新选择新的中继终端设备)；
场景F：远端终端设备工作在多路径模式，保持非直连路径不变，改为直连路径到不同小区。
在相关技术中，当远端终端设备通过中继终端设备进行U2N中继通信时，如果中继终端设备处于RRC空闲态或RRC非激活态，会先发起RRC连接建立或RRC连接恢复，进入到RRC连接态。触发中继终端设备进入RRC连接态的方法是当中继终端设备收到远端终端设备通过特定的缺省配置(SL-RLC0或SL-RLC1)发送的RRC消息时(SRB0或SRB1承载的消息)，触发RRC连接建立过程或RRC连接恢复过程，进入RRC连接态。
对于R17U2N中继场景，远端终端设备在同一时刻只有直连路径或非直连路径，从直连路径切换到非直连路径时，RRC重配置完成消息(SRB1承载的消息)只能通过中继终端设备转发，因此，当中继终端设备处于RRC空闲态或RRC非激活态时，接收到远端终端设备发送的RRC重配置完成消息即可触发中继终端设备的RRC连接建立过程或RRC连接恢复过程。
对于多路径中继场景下的路径管理场景A和场景E，涉及到中继终端设备的添加或改变，当新添加或改变的中继终端设备此时处于RRC空闲态或RRC非激活态时，同样需要解决如何触发中继终端设备进入RRC连接态的问题。
不同于R17U2N中继场景，对于多路径中继场景下，远端终端设备会保持直连路径，用于指示添加或改变中继终端设备完成的RRC重配置完成消息可以直接通过直连路径发送，因此，无法直接采用R17的方法触发中继终端设备进入RRC连接态，进而无法实现多路径通信的功能。
如果限制远端终端设备在直连路径可用的情况下，仍必须通过非直连路径发送由SRB1承载的RRC消息，则会严重限制网络侧设备的配置，不利于网络侧设备的灵活部署，影响网络性能，若处于RRC空闲态或RRC非激活态的中继终端设备无法及时进入RRC连接态，当远端终端设备需要通过多路径发送数据时，则会造成严重的时延，影响用户体验和多路径通信的性能。
为了解决上述技术问题，本公开实施例提供的方案，接收网络侧设备发送的RRC重配置消息；向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复，在保证网络灵活配置的同时，及时触发中继终端设备进入RRC连接态，从而实现多路径通信功能，减少端对端时延，避免非直连路径改变场景下的业务中断或速率降低的问题，提升网络吞吐量和可靠性，提升用户体验。具体通过如 下实施例进行说明：
首先，本公开实施例中提供了一种触发中继终端设备进入RRC连接态的方法，该方法可以由任意具备计算处理能力的系统执行。在一种可行的实施方案中，该方法对应的流程可以由远端终端设备来执行；在另一种可行的实施方案中，该方法对应的流程可以由网络侧设备来执行；在其他可行的实施方案中，该方法对应的流程可以由中继终端设备来执行。
图2示出本公开实施例中一种触发中继终端设备进入RRC连接态的方法流程图，如图2所示，本公开实施例中提供的触发中继终端设备进入RRC连接态的方法，应用于远端终端设备，包括如下步骤：
S202、接收网络侧设备发送的RRC重配置消息。
需要说明的是，S202中的RRC重配置消息可以包括以下中的至少一种信息：远端终端设备的本地ID信息；中继终端设备的源层二ID信息；直通链路中继适配协议SRAP配置信息；SRB1相关配置信息；第二信元。
其中，远端终端设备可以根据网络侧设备指示的中继终端设备的源层二ID信息确定非直连路径上的中继终端设备。需要说明的是，对于改变非直连路径的场景中，上述的中继终端设备可以为目标中继终端设备。
上述的SRB1相关配置信息包括以下至少一种：在直连路径和/或非直连路径上配置独立SRB1、配置支持分离的SRB1、配置支持冗余传输的SRB1。
上述的第二信元，用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
S204、向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
在一个实施例中，第一信令消息可以包括直通链路接口PC5-RRC消息或RRC重配置完成消息中的至少一种。
示例性的，当第一信令消息包括PC5-RRC消息时，PC5-RRC消息中至少包括第一信元，第一信元用于触发中继终端设备进入RRC连接态。需要说明的是，PC5-RRC消息可以为新定义的消息，也可以重用现有PC5-RRC消息。
示例性的，当第一信令消息包括RRC重配置完成消息时，远端终端设备通过中继终端设备向网络侧设备发送RRC重配置完成消息，RRC重配置完成消息由远端终端设备使用缺省配置的直通链路-无线链路控制SL-RLC1发送。
当远端终端设备向中继终端设备发送第一信令消息后，中继终端设备接收到远端终端设备发送的用于触发中继终端设备进入RRC连接态的PC5-RRC消息，或者中继终端设备接收到远端终端设备使用特定SL-RLC1配置发送的RRC重配置完成消息，如果此时中继终端设备处于RRC空闲态或RRC非激活态，则执行RRC连接建立或RRC连接恢复过程，进入RRC连接态。即处于RRC空闲态的中继终端设备执行RRC连接建立，处于RRC非激活态的中继终端设备执行RRC连接恢复。
需要说明的是，对于中继终端设备接收到远端终端设备通过SL-RLC配置发送的RRC重配置完成消息的场景，中继终端设备进入RRC连接态后，向网络侧设备转发远端终端设备发送的RRC重配置完成消息。
网络侧设备向中继终端设备发送RRC重配置消息，以指示中继终端设备增加远端终端设备，从而使远端终端设备与网络侧设备之间进行上下行多路径传输。
本公开实施例提供的方案，接收网络侧设备发送的RRC重配置消息；向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复，在 保证网络灵活配置的同时，及时触发中继终端设备进入RRC连接态，从而实现多路径通信功能，减少端对端时延，避免非直连路径改变场景下的业务中断或速率降低的问题，提升网络吞吐量和可靠性，提升用户体验。
图3示出本公开实施例中提供的另一种触发中继终端设备进入RRC连接态的方法流程图。在如2实施例的基础上，将S204进一步细化为S2042，以对第一信令消息包括RRC重配置完成消息的情形进行限定。如图3所示，在一个实施例中，当第一信令消息包括RRC重配置完成消息时，上述S204中的向中继终端设备发送第一信令消息，包括：
S2042、当RRC重配置消息中包含非直连路径上SRB1的相关配置信息时，使用缺省配置的SL-RLC1向中继终端设备发送RRC重配置完成消息，以使处于RRC空闲态的中继终端设备执行RRC连接建立的相关操作或处于RRC非激活态的中继终端设备执行RRC连接恢复的相关操作。
需要说明的是，上述的非直连路径上SRB1的相关配置信息包括以下至少一种：在非直连路径上配置了独立的SRB1、配置了支持分离的SRB1且分离的SRB1的主RLC实体配置在非直连路径、配置了支持冗余传输的SRB1。
当非直连路径上配置了独立的SRB1、或者支持分离的SRB1且分离的SRB1的主RCL实体配置在非直连路径、或支持冗余传输的SRB1时，表明可以使用缺省配置的SL-RLC1在非直连路径向网络侧设备发送RRC重配置完成消息，从而通过RRC重配置完成消息触发中继终端设备进入RRC连接态。
在本公开实施方式中，当RRC重配置消息中包含非直连路径上SRB1的相关配置消息时，使用缺省配置的SL-RLC1向中继终端设备发送RRC重配置完成消息，从而通过RRC重配置完成消息触发中继终端设备进入RRC连接态，实现多路径通信，减少端对端时延，提升系统性能和用户体验。
图4示出本公开实施例中提供的又一种触发中继终端设备进入RRC连接态的方法流程图。在图2实施例的基础上，将S204进一步细化为S2044，以对第一信令消息包括PC5-RRC消息的情形进行限定。如图4所示，在一个实施例中，当第一信令消息包括PC5-RRC消息时，上述S204中的向中继终端设备发送第一信令消息，包括以下至少一种：
S2044、当RRC重配置消息包含第二信元时，向中继终端设备发送PC5-RRC消息；或
当RRC重配置消息中未在非直连路径上配置SRB1、或配置了分离的SRB1且分离的SRB1的主RLC实体配置未配置在非直连路径上时，远端终端设备向中继终端设备发送PC5-RRC消息；或
当远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，向中继终端设备发送PC5-RRC消息。
需要说明的是，当RRC重配置消息包含第二信元时，第二信元用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
在一个实施例中，当远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，上述S204中的向中继终端设备发送第一信令消息，包括：在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，远端终端设备获得中继终端设备的RRC状态信息，获得中继终端设备的RRC状态信息为RRC空闲态或RRC非激活态时，向中继终端设备发送PC5-RRC消息；或在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，中继终端设备指示远端终端设备需要发送PC5-RRC消息时，向中继终端设备发送PC5-RRC消息。
在远端终端设备与中继终端设备交互过程中，例如sidelink发现或PC5连接建立 过程中的交互信息，增加相关指示信息，例如中继终端设备RRC状态指示信息、或中继终端设备指示需要触发进入RRC连接态的信息等。
示例性的，在交互过程中远端终端设备获得中继终端设备的连接状态信息或者是否需要发送PC5-RRC消息触发中继终端设备进入RRC连接态的指示等，当中继终端设备指示的RRC状态信息为RRC空闲态或RRC非激活态时，或中继终端设备指示需要远端终端设备发送PC5-RRC消息时，远端终端设备发送PC5-RRC消息，从而触发中继终端设备执行进入RRC连接态的相关操作。
在本公开实施方式中，通过在RRC重配置消息中携带第二信元、或者当RRC重配置消息中未在非直连路径上配置SRB1、或配置了分离的SRB1且分离的SRB1的主RLC实体配置未配置在非直连路径上时、以及或者通过远端终端设备与中继终端设备在交互过程中确定需要发送PC5-RRC消息，从而通过多种不同方式确定需要向中继终端设备发送PC5-RRC消息，进而触发中继终端设备进入RRC连接态，实现多路径通信，减少端对端时延，提升系统性能和用户体验。
图5示出本公开实施例中提供的再一种触发中继终端设备进入RRC连接态的方法流程图。在图2实施例的基础上，在S204之后增加S502，以对RRC重配置完成消息发送方式进行限定。如图5所示，在一个实施例中，本公开实施例提供的触发中继终端设备进入RRC连接态的方法包括S202～S204、以及S502。其中，该方法包括：
S502、通过直连路径和/或非直连路径向网络侧设备发送RRC重配置完成消息。
其中，通过直连路径向网络侧设备发送RRC重配置完成消息为远端终端设备不通过直通链路中继终端设备，而直接向网络侧设备发送RRC重配置完成消息；通过非直连路径向网络侧设备发送RRC重配置完成消息为远端终端设备通过中继终端设备向网络侧设备发送RRC重配置完成消息。
需要说明的是，本实施例中的S202～S204的实现方式与前述是实施例中S202～S204的实现方式相同，此处不再赘述。
在一个实施例中，上述S502通过直连路径和/或非直连路径向网络侧设备发送RRC重配置完成消息，包括以下至少一种：
当RRC重配置消息中配置了支持冗余传输的分离SRB1，通过直连路径和非直连路径向网络侧设备发送RRC重配置完成消息；
当RRC重配置消息中配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径，或在直连路径上配置了独立的SRB1，通过直连路径向网络侧设备发送RRC重配置完成消息；
当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，通过直连路径SRB1向网络侧设备发送RRC重配置完成消息。
在一种实施例中，当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，直连路径配置了可用的SRB1包括以下至少一种：直连路径配置了独立的SRB1、或配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径。
在本公开实施方式中，通过在RRC重配置消息中对直连路径和非直连路径的SRB1进行合理配置，从而通过直连路径和/或非直连路径向网络侧设备发送RRC重配置完成消息，从而实现多路径通信，减小端对端时延，提升系统性能和用户体验。
图6示出本公开实施例中提供的应用于网络侧设备的触发中继终端设备进入RRC连接态的方法流程图。如图6所示，本公开实施例提供的触发中继终端设备进入RRC连接态的方法，应用于网络侧设备，包括：
S602、向远端终端设备发送RRC重配置消息，以使远端终端设备根据RRC重配置消息，向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲 态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
图7示出本公开实施例中提供的应用于中继终端设备的触发中继终端设备进入RRC连接态的方法流程图。如图7所示，本公开实施例提供的触发中继终端设备进入RRC连接态的方法，应用于中继终端设备，包括：
S702、接收远端终端设备发送的第一信令消息；
S704、当中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
需要说明的是，网络侧设备和中继终端设备的实现方式可以参考远端终端设备中的实施例，此处不再赘述。
为了加深对本公开提供的触发中继终端设备进入RRC连接态的方法的理解，下面结合附图8～图15进行说明。
通信系统包括远端终端设备、中继终端设备和网络侧设备，其中，网络侧设备以基站为例进行说明。
远端终端设备先工作在直连路径，再添加非直连路径，即场景A，可以采用实施例一至实施例四的流程实现触发中继终端设备进入RRC连接态。
在multi-path relay场景下，远端终端设备首先工作在直连路径，即直接与基站通过Uu接口通信；之后在基站指示下添加非直连路径，增加通过中继终端设备到基站的路径。当基站选择的中继终端设备处于RRC空闲态或RRC非激活态时，需要首先触发中继终端设备进入RRC连接态，才可以实现上下行多路径传输。
实施例一：
在该场景下，基站仅配置SRB1在直连路径，并指示远端终端设备无需发送PC5-RRC消息触发目标中继终端设备进入RRC连接态(即中继终端设备已处于连接态)。如图8所示，触发中继终端设备进入RRC连接态的流程如下：
S801、远端终端设备通过单路径与基站进行上下行传输，即远端终端设备与基站通过单路径传输上/下行数据。上述的单路径可以为直连路径。
S802、远端终端设备根据网络配置进行测量配置与测量上报。
S803、基站根据远端终端设备上报的测量结果，确定添加非直连路径，选择目标中继终端设备，并向远端终端设备发送RRC重配置消息，其中，RRC重配置消息至少包含如下信息中的一个或多个：远端终端本地ID，目标中继终端设备的源层二L2ID信息，SRAP配置信息，SRB1相关配置信息等，其中，SRB1相关配置信息为仅配置SRB1在直连路径上。
S804、远端终端设备与中继终端设备建立PC5连接；远端终端设备根据RRC重配置消息内容，此时，不需要向目标中继终端设备发送PC5-RRC消息。
S805、基站向目标中继终端设备发送RRC重配置消息，指示目标中继终端设备添加远端终端设备。其中，目标中继终端设备接收到的RRC重配置消息至少包含以下内容：远端终端设备本地ID和L2 ID信息、SRAP相关配置等。
S806、远端终端设备根据RRC重配置消息内容确定通过直连路径或非直连路径发送RRC重配置完成消息，如基站未配置非直连路径上的SRB1，则通过直连路径发送。
S807、远端终端设备与基站之间进行上下行多路径传输。
需要说明的是，上述S804和S805之间无顺序关联，例如，S804可以在S805之前执行，也可以在S805之后执行，取决于终端设备和网络侧设备的实现。
实施例二：
基站可以配置SRB1在非直连路径(如配置分离SRB1、SRB1冗余传输、或仅在 非直连路径配置SRB1等)，远端终端设备通过非直连路径上发送SRB1消息(即RRC重配置完成消息)触发目标中继终端设备进入RRC连接态，无需发送PC5-RRC消息。如图9所示，触发中继终端设备进入RRC连接态的流程如下：
S901、远端终端设备通过单路径与基站进行上下行传输，即远端终端设备与基站通过单路径传输上/下行数据。上述的单路径可以为直连路径。该步骤与实施例一中的S801相同。
S902、远端终端设备根据网络配置进行测量配置与测量上报。该步骤与实施例一中的S802相同。
S903、基站根据远端终端设备上报的测量结果，确定增加非直连路径，并选择目标中继终端设备；基站向远端终端设备发送RRC重配置消息，其中，RRC重配置信息至少包含如下信息中的一个或多个：远端终端设备本地ID信息、目标中继终端设备L2 ID信息、SRAP相关配置、SRB1相关配置信息等，其中，SRB1相关配置信息为配置SRB1在非直连路径。
S904、远端终端设备与中继终端设备建立PC5连接，此时，远端终端设备根据RRC重配置消息确定不需要向目标中继终端设备发送PC5-RRC消息用于触发目标中继终端设备进入RRC连接态；远端终端设备根据RRC重配置消息内容确定通过非直连路径发送RRC重配置完成消息；远端终端设备通过特定的缺省配置(SL-RLC1)向中继终端设备发送的RRC重配置完成消息。
S905、当中继终端设备接收到远端终端设备通过特定的缺省配置(SL-RLC1)发送的RRC消息时，如果此时中继终端设备未处于RRC连接态，则执行相关操作进入RRC连接态。如此时中继终端设备处于RRC空闲态，则执行RRC连接建立过程；如此时中继终端设备处于RRC非激活态，则执行RRC连接恢复过程。
S906、基站向目标中继终端设备发送RRC重配置消息，指示目标中继终端设备添加远端终端设备。目标中继终端设备接收到的RRC重配置消息内容至少包含以下内容：远端终端设备本地ID和L2 ID信息、SRAP相关配置等。
S907、中继终端设备根据基站配置，将远端终端设备发送的RRC消息(即RRC重配置完成消息)发送给基站。
S908、远端终端设备与基站间进行上下行多路径传输。
实施例三：
基站在RRC重配置消息中添加第二信元，指示远端终端设备发送PC5-RRC消息，以触发目标中继终端设备进入RRC连接态。如图10所示，触发中继终端设备进入RRC连接态的流程如下：
S1001～S1002，与实施例一中的S801～S802相同，此处不再赘述。
S1003、基站根据远端终端设备上报的测量结果，确定增加非直连路径，并选择目标中继终端设备；基站向远端终端设备发送RRC重配置消息，RRC重配置消息至少包含如下信息中的一个或多个：远端终端设备本地ID信息、目标中继终端设备L2ID信息、SRAP相关配置、第二信元，其中，第二信元用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息，从而触发中继终端设备进入RRC连接态。
S1004、远端终端设备与中继终端设备建立PC5连接；远端终端设备根据RRC重配置消息中第二信元确定需要向目标中继终端设备发送PC5-RRC消息，用于触发目标中继终端设备进入RRC连接态。
S1005、远端终端设备向中继终端设备发送PC5-RRC消息，PC5-RRC消息中至少包含第一信元，用于触发中继终端设备进入RRC连接态。
S1006、中继终端设备接收远端终端设备发送的PC5-RRC消息，如果此时中继终端设备未处于RRC连接态，则根据第一信元，执行相关操作进入RRC连接态。如此 时中继终端设备处于RRC空闲态，则执行RRC连接建立过程；如此时中继终端设备处于RRC非激活态，则执行RRC连接恢复过程。
S1007、基站向目标中继终端设备发送RRC重配置消息，指示目标中继终端设备添加远端终端设备；消息内容至少包含以下内容：远端终端设备本地ID和L2 ID信息、SRAP相关配置等。
S1008、远端终端设备根据基站配置，通过直连路径(或非直连路径)发送RRC重配置完成消息给基站。
S1009、远端终端设备与基站间进行上下行多路径传输。
需要说明的是，S1008与S1004～S1007的执行顺序无关，只需在S1003之后即可，具体取决于终端设备的实现。
实施例四：
远端终端设备基于实现或基于与中继终端设备的交互过程中获得的相关指示信息，自主确定发送PC5-RRC消息触发目标中继终端设备进入RRC连接态。如图11所示，一种触发中继终端设备进入RRC连接态的方法，包括以下步骤：
S1101～S1102、与实施例一中的S801～S802相同，此处不再赘述。
S1103、基站根据远端终端设备上报的测量结果，确定增加非直连路径，并选择目标中继终端设备；基站向远端终端设备发送RRC重配置消息，RRC重配置消息至少包含如下信息中的一个或多个：远端终端设备本地ID信息、目标中继终端设备L2ID信息、SRAP相关配置。
S1104、远端终端设备与中继终端设备建立PC5连接，在交互过程中获得相关指示信息，如中继终端设备RRC状态指示信息、或中继终端设备指示需要触发进入RRC连接态的信息等；远端终端设备根据相关指示信息确定需要向目标中继终端设备发送PC5-RRC消息用于触发目标中继终端设备进入RRC连接态。
S1105～S1108，与实施例三中的S1005～S1008相同。
S1109、远端终端设备与基站间进行上下行多路径传输。
需要说明的是，S1108与S1104～S1107无顺序关系，在S1003之后即可，具体取决于终端设备实现。
对于场景E，远端终端设备工作在多路径模式，保持直连路径不变，改变非直连路径，即重新选择新的中继终端设备。
在场景E中，在多路径模式下，远端终端设备工作在多路径模式，之后在基站指示下改变非直连路径，选择新的中继终端设备。当基站选择的中继终端设备处于RRC空闲态或RRC非激活态时，需要首先触发中继终端设备进入RRC连接态，才可以实现上下行多路径传输。在该场景下，可以采用实施例五至实施例八的流程实现。
实施例五：
基站通过仅配置SRB1在直连路径，远端终端设备无需发送PC5-RRC消息触发目标中继终端设备进入RRC连接态，此时，目标中继终端设备已处于RRC连接态。如图12所示，一种触发中继终端设备进入RRC连接态的方法，包括以下步骤：
S1201、远端终端设备与基站进行上下行多路径传输。
S1202、远端终端设备根据网络配置进行测量与上报。
S1203、基站根据终端设备上报的测量结果，确定改变非直连路径，并选择目标中继终端设备；基站向远端终端设备发送RRC重配置消息，至少包含如下信息中的一个或多个：远端终端设备本地ID信息(如果需要更新的话)、目标中继终端设备L2 ID信息、SRAP相关配置(仅配置SRB1在直连路径)等。
S1204、远端终端设备与目标中继终端设备建立PC5连接；远端终端设备根据RRC重配置消息内容，确定不需要向目标中继终端设备发送PC5-RRC消息，用于触 发中继终端设备进入RRC连接态。
S1205、基站向目标中继终端设备发送RRC重配置消息，指示目标中继终端设备添加远端终端设备；消息内容至少包含以下内容：远端终端设备本地ID信息和L2 ID信息，SRAP相关配置等。
S1206、远端终端设备根据RRC重配置消息内容确定通过直连路径或非直连路径发送RRC重配置完成消息，如基站未配置非直连路径上的SRB1，则通过直连路径发送。
S1207、基站向源中继终端设备发送RRC重配置消息，指示源中继终端设备释放远端终端设备。
S1208、远端终端设备与源终端设备间释放PC5连接。
S1209、远端终端设备与基站间进行上下行多路径传输。
其中，步骤S1204和S1205无顺序关联，取决于终端设备和网络侧设备实现。
实施例六：
基站通过配置SRB1在非直连路径(如配置分离SRB1、SRB1冗余传输、或仅在非直连路径配置SRB1等)，指示远端终端设备无需发送PC5-RRC消息，通过非直连路径上发送SRB1消息(即RRC重配置完成消息)触发目标中继终端设备进入RRC连接态。如图13所示，一种触发中继终端设备进入RRC连接态的方法，包括以下步骤：
S1301～S1302、与实施例五中的S1201～S1202相同。
S1303、基站根据终端设备上报的测量结果，确定改变非直连路径，并选择目标中继终端设备；基站向远端终端设备发送RRC重配置消息，RRC重配置消息至少包含如下信息中的一个或多个：远端终端设备本地ID信息(如果需要更新的话)、目标中继终端设备L2 ID信息、SRAP相关配置(包含配置SRB1在非直连路径)等。
S1304、远端终端设备与目标中继终端设备建立PC5连接；远端终端设备根据RRC重配置消息内容确定不需要向目标中继终端设备发送PC5-RRC消息用于触发目标中继终端设备进入RRC连接态；远端终端设备根据RRC重配置消息内容确定需要通过非直连路径发送RRC重配置完成消息；远端终端设备通过特定的缺省配置(SL-RLC1)向目标中继终端设备发送的RRC重配置完成消息。
S1305、目标中继终端设备接收到远端终端设备通过特定的缺省配置(SL-RLC1)发送的RRC消息时，如果此时该中继终端设备未处于RRC连接态，则执行相关操作进入RRC连接态。如此时该中继终端设备处于RRC空闲态，则执行RRC连接建立过程；如此时该中继终端设备处于RRC非激活态，则执行RRC连接恢复过程。
S1306、基站向目标中继终端设备发送RRC重配置消息，指示目标中继终端设备添加远端终端设备；消息内容至少包含以下内容：远端终端设备本地ID信息和L2 ID信息、SRAP相关配置等。
S1307、目标中继终端设备根据基站配置，将远端终端设备发送的RRC消息(即RRC重配置完成消息)发送给基站。
S1308～S1310、与实施例五中的S1207～S1209相同，不再赘述。
实施例七：
基站在RRC重配置消息中添加直接指示信息，指示远端终端设备发送PC5-RRC消息触发目标中继终端设备进入RRC连接态。如图14所示，一种触发中继终端设备进入RRC连接态的方法，包括以下步骤：
S1401～S1402、与实施例五中的S1201～S1202相同，不再赘述。
S1403、基站根据终端设备上报的测量结果，确定改变非直连路径，并选择目标中继终端设备；基站向远端终端设备发送RRC重配置消息，RRC重配置消息至少包 含如下信息中的一个或多个：远端终端设备本地ID信息(如果需要更新的话)、目标中继终端设备L2 ID信息、SRAP相关配置、第二信元，其中，第二信元用于指示远端终端设备向中继终端设备发送PC5-RRC消息，以触发目标中继终端设备进入RRC连接态。
S1404、远端终端设备与目标中继终端设备建立PC5连接；远端终端设备根据RRC重配置消息中的第二信元确定需要向目标中继终端设备发送PC5-RRC消息用于触发目标中继终端设备进入RRC连接态。
S1405、远端终端设备向目标中继终端设备发送PC5-RRC消息，PC5-RRC消息中至少包含第一信元，第一信元用于触发中继终端设备进入RRC连接态。
S1406、目标中继终端设备接收远端终端设备发送的PC5-RRC消息，如果此时该中继终端设备未处于RRC连接态，则根据第一信元，执行相关操作进入RRC连接态：如此时中继终端设备处于RRC空闲态，则执行RRC连接建立过程；如此时中继终端设备处于RRC非激活态，则执行RRC连接恢复过程。
S1407、基站向目标中继终端设备发送RRC重配置消息，指示目标中继终端设备添加远端终端设备；消息内容至少包含以下内容：远端终端设备本地ID和L2 ID信息，SRAP相关配置等。
S1408、远端终端设备根据基站配置，通过直连路径(或非直连路径)发送RRC重配置完成消息给基站。
S1409～S1411、与实施例五中S1207～S1209相同，不再赘述。
其中，S1408与S1404～S1407无顺序关系，在S1403之后即可，具体取决于终端设备实现。
实施例八：
远端终端设备基于实现或基于与目标中继终端设备的交互过程中获得的相关指示信息，自主确定发送PC5-RRC消息触发目标中继终端设备进入RRC连接态。如图15所示，一种触发中继终端设备进入RRC连接态的方法，包括以下步骤：
S1501～S1502、与实施例五中的S1201～S1202相同，不再赘述。
S1503、基站根据终端设备上报的测量结果，确定改变非直连路径，并选择目标中继终端设备；基站向远端终端设备发送RRC重配置消息，RRC重配置消息至少包含如下信息中的一个或多个：远端终端设备本地ID信息(如果需要更新的话)、目标中继终端设备L2 ID信息、SRAP相关配置等。
S1504、远端终端设备与目标中继终端设备建立PC5连接，在交互过程中获得相关指示信息，如目标中继终端设备RRC状态指示信息、或目标中继终端设备指示需要触发进入RRC连接态的信息等；远端终端设备根据相关指示信息确定需要向目标中继终端设备发送PC5-RRC消息用于触发目标中继终端设备进入RRC连接态。
S1505～S1511、与实施例七中的S1405～S1411相同，不再赘述；
其中，S1508与S1504～S1507无顺序关系，在S1503之后即可，具体取决于终端设备实现。
基于同一发明构思，本公开实施例中还提供了一种远端终端设备、中继终端设备和通信系统等相关设备，如下面的实施例所述。由于该相关设备实施例解决问题的原理与上述方法实施例相似，因此该相关设备实施例的实施可以参见上述方法实施例的实施，重复之处不再赘述。
图16示出本公开实施例中一种远端终端设备的结构示意图，如图16所示，本公开实施例提供的远端终端设备包括：配置消息接收模块1610和信令消息发送模块1620。
其中，配置消息接收模块1610，用于接收网络侧设备发送的RRC重配置消息；
信令消息发送模块1620，用于向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
需要说明的是，第一信令消息包括直通链路接口PC5-RRC消息或RRC重配置完成消息中的至少一种；其中，当第一信令消息包括PC5-RRC消息时，PC5-RRC消息中至少包括第一信元，所述第一信元用于触发中继终端设备进入RRC连接态；当第一信令消息包括RRC重配置完成消息时，远端终端设备通过中继终端设备向网络侧设备发送RRC重配置完成消息，RRC重配置完成消息由远端终端设备使用缺省配置的直通链路-无线链路控制SL-RLC1发送。
在本公开的一个实施例中，当第一信令消息包括RRC重配置完成消息时，信令消息发送模块1620，用于当RRC重配置消息中包含非直连路径上SRB1的相关配置信息时，使用缺省配置的SL-RLC1向中继终端设备发送RRC重配置完成消息，以使处于RRC空闲态的中继终端设备执行RRC连接建立的相关操作或处于RRC非激活态的中继终端设备执行RRC连接恢复的相关操作。
需要说明的是，非直连路径上SRB1的相关配置信息包括以下至少一种：在非直连路径上配置了独立的SRB1、配置了支持分离的SRB1且分离的SRB1的主RLC实体配置在非直连路径、配置了支持冗余传输的SRB1。
在本公开的一个实施例中，当第一信令消息包括PC5-RRC消息时，信令消息发送模块1620，用于当RRC重配置消息包含第二信元时，向中继终端设备发送PC5-RRC消息；或当RRC重配置消息中未在非直连路径上配置SRB1、或配置了分离的SRB1且分离的SRB1的主RLC实体配置未配置在非直连路径上时，远端终端设备向中继终端设备发送PC5-RRC消息；或当远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，向中继终端设备发送PC5-RRC消息。
需要说明的是，当RRC重配置消息包含第二信元时，第二信元用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
在本公开的一个实施例中，当远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，信令消息发送模块1620，用于在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，远端终端设备获得中继终端设备的RRC状态信息，获得中继终端设备的RRC状态信息为RRC空闲态或RRC非激活态时，向中继终端设备发送PC5-RRC消息；或在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，中继终端设备指示远端终端设备需要发送PC5-RRC消息时，向中继终端设备发送PC5-RRC消息。
在一个实施例中，远端终端设备还包括未显示在附图中的配置消息完成发送模块，用于通过直连路径和/或非直连路径向网络侧设备发送RRC重配置完成消息。
在本公开的一个实施例中，配置消息完成发送模块，用于当RRC重配置消息中配置了支持冗余传输的分离SRB1，通过直连路径和非直连路径向网络侧设备发送RRC重配置完成消息；当RRC重配置消息中配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径，或在直连路径上配置了独立的SRB1，通过直连路径向网络侧设备发送RRC重配置完成消息；当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，通过直连路径SRB1向网络侧设备发送RRC重配置完成消息。
需要说明的是，当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，直连路径配置了可用的SRB1包括以下至少一种：直连路径配置了独立的SRB1、或配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径。
需要说明的是，RRC重配置消息包括以下中至少一种信息：远端终端设备的本地ID信息；中继终端设备的源层二ID信息；直通链路中继适配协议SRAP配置信息；SRB1相关配置信息，SRB1相关配置信息包括以下至少一种：在直连路径和/或非直连路径上配置独立SRB1、配置支持分离的SRB1、配置支持冗余传输的SRB1；第二信元，用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
在本公开实施方式中，接收网络侧设备发送的RRC重配置消息；向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复，在保证网络灵活配置的同时，及时触发中继终端设备进入RRC连接态，从而实现多路径通信功能，减少端对端时延，避免非直连路径改变场景下的业务中断或速率降低的问题，提升网络吞吐量和可靠性，提升用户体验。
图17示出本公开实施例中提供的一种网络侧设备的结构示意图。如图17所示，在一个实施例中，本公开实施例提供的网络侧设备，包括配置消息发送模块1710，用于向远端终端设备发送RRC重配置消息，以使远端终端设备根据RRC重配置消息，向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
图18示出本公开实施例中提供的一种中继终端设备的结构示意图。如图18所示，在一个实施例中，本公开实施例提供的中继终端设备，包括信令消息接收模块1810，用于接收远端终端设备发送的第一信令消息；RRC连接模块1820，用于当中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
除此之外，在一个实施例中，本公开实施例还提供了一种通信系统，包括网络侧设备、中继终端设备和远端终端设备，其中，网络侧设备，用于向远端终端设备发送RRC重配置消息；远端终端设备，用于接收网络侧设备发送的无线资源控制RRC重配置消息；向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复远端终端设备根据RRC重配置消息；中继终端设备，用于接收远端终端设备发送的第一信令消息；当中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
所属技术领域的技术人员能够理解，本发明的各个方面可以实现为系统、方法或程序产品。因此，本发明的各个方面可以具体实现为以下形式，即：完全的硬件实施方式、完全的软件实施方式(包括固件、微代码等)，或硬件和软件方面结合的实施方式，这里可以统称为“电路”、“模块”或“系统”。
下面参照图19来描述根据本发明的这种实施方式的电子设备1900。图19显示的电子设备1900仅仅是一个示例，不应对本发明实施例的功能和使用范围带来任何限制。
如图19所示，电子设备1900以通用计算设备的形式表现。电子设备1900的组件可以包括但不限于：上述至少一个处理单元1910、上述至少一个存储单元1920、连接不同系统组件(包括存储单元1920和处理单元1910)的总线1930。
其中，所述存储单元存储有程序代码，所述程序代码可以被所述处理单元1910执行，使得所述处理单元1910执行本说明书上述“示例性方法”部分中描述的根据本发明各种示例性实施方式的步骤。例如，所述处理单元1910可以执行如图2中所示的接收网络侧设备发送的无线资源控制RRC重配置消息；向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建 立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
例如，处理单元1910可以执行如图6中所示的向远端终端设备发送RRC重配置消息，以使远端终端设备根据RRC重配置消息，向中继终端设备发送第一信令消息，第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
例如，处理单元1910可以执行如图7中所示的接收远端终端设备发送的第一信令消息；当中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
存储单元1920可以包括易失性存储单元形式的可读介质，例如随机存取存储单元(RAM)19201和/或高速缓存存储单元19202，还可以进一步包括只读存储单元(ROM)19203。
存储单元1920还可以包括具有一组(至少一个)程序模块19205的程序/实用工具19204，这样的程序模块19205包括但不限于：操作系统、一个或者多个应用程序、其它程序模块以及程序数据，这些示例中的每一个或某种组合中可能包括网络环境的实现。
总线1930可以为表示几类总线结构中的一种或多种，包括存储单元总线或者存储单元控制器、外围总线、图形加速端口、处理单元或者使用多种总线结构中的任意总线结构的局域总线。
电子设备1900也可以与一个或多个外部设备1940(例如键盘、指向设备、蓝牙设备等)通信，还可与一个或者多个使得用户能与该系统交互的设备通信，和/或与使得该电子设备1900能与一个或多个其它计算设备进行通信的任何设备(例如路由器、调制解调器等等)通信。这种通信可以通过输入/输出(I/O)接口1950进行。并且，系统还可以通过网络适配器1960与一个或者多个网络(例如局域网(LAN)，广域网(WAN)和/或公共网络，例如因特网)通信。如图19所示，网络适配器1960通过总线1930与电子设备1900的其它模块通信。应当明白，尽管图中未示出，可以结合电子设备1900使用其它硬件和/或软件模块，包括但不限于：微代码、设备驱动器、冗余处理单元、外部磁盘驱动阵列、RAID系统、磁带驱动器以及数据备份存储系统等。
通过以上的实施方式的描述，本领域的技术人员易于理解，这里描述的示例实施方式可以通过软件实现，也可以通过软件结合必要的硬件的方式来实现。因此，根据本公开实施方式的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中或网络上，包括若干指令以使得一台计算设备(可以是个人计算机、服务器、终端装置、或者网络设备等)执行根据本公开实施方式的方法。
特别地，根据本公开的实施例，上文参考流程图描述的过程可以被实现为计算机程序产品，该计算机程序产品包括：计算机程序，所述计算机程序被处理器执行时实现上述的触发中继终端设备进入RRC连接态的方法。
在本公开的示例性实施例中，还提供了一种计算机可读存储介质，其上存储有能够实现本说明书上述方法的程序产品。在一些可能的实施方式中，本发明的各个方面还可以实现为一种程序产品的形式，其包括程序代码，当所述程序产品在终端设备上运行时，所述程序代码用于使所述终端设备执行本说明书上述“示例性方法”部分中描述的根据本发明各种示例性实施方式的步骤。
描述了根据本发明的实施方式的用于实现上述方法的程序产品，其可以采用便携式紧凑盘只读存储器(CD-ROM)并包括程序代码，并可以在终端设备，例如个人电脑上运行。然而，本发明的程序产品不限于此，在本文件中，可读存储介质可以是任何 包含或存储程序的有形介质，该程序可以被指令执行系统、装置或者器件使用或者与其结合使用。
所述程序产品可以采用一个或多个可读介质的任意组合。可读介质可以是可读信号介质或者可读存储介质。可读存储介质例如可以为但不限于电、磁、光、电磁、红外线、或半导体的系统、装置或器件，或者任意以上的组合。可读存储介质的更具体的例子(非穷举的列表)包括：具有一个或多个导线的电连接、便携式盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、光纤、便携式紧凑盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。
计算机可读信号介质可以包括在基带中或者作为载波一部分传播的数据信号，其中承载了可读程序代码。这种传播的数据信号可以采用多种形式，包括但不限于电磁信号、光信号或上述的任意合适的组合。可读信号介质还可以是可读存储介质以外的任何可读介质，该可读介质可以发送、传播或者传输用于由指令执行系统、装置或者器件使用或者与其结合使用的程序。
应当注意，尽管在上文详细描述中提及了用于动作执行的设备的若干模块或者单元，但是这种划分并非强制性的。实际上，根据本公开的实施方式，上文描述的两个或更多模块或者单元的特征和功能可以在一个模块或者单元中具体化。反之，上文描述的一个模块或者单元的特征和功能可以进一步划分为由多个模块或者单元来具体化。
此外，尽管在附图中以特定顺序描述了本公开中方法的各个步骤，但是，这并非要求或者暗示必须按照该特定顺序来执行这些步骤，或是必须执行全部所示的步骤才能实现期望的结果。附加的或备选的，可以省略某些步骤，将多个步骤合并为一个步骤执行，以及/或者将一个步骤分解为多个步骤执行等。
通过以上的实施方式的描述，本领域的技术人员易于理解，这里描述的示例实施方式可以通过软件实现，也可以通过软件结合必要的硬件的方式来实现。因此，根据本公开实施方式的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中或网络上，包括若干指令以使得一台计算设备(可以是个人计算机、服务器、移动终端、或者网络设备等)执行根据本公开实施方式的方法。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由所附的权利要求指出。

Claims (20)

  1. 一种触发中继终端设备进入RRC连接态的方法，其中，应用于远端终端设备，所述方法包括：
    接收网络侧设备发送的无线资源控制RRC重配置消息；
    向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
  2. 根据权利要求1所述的方法，其中，所述第一信令消息包括直通链路接口PC5-RRC消息或RRC重配置完成消息中的至少一种；
    其中，当所述第一信令消息包括PC5-RRC消息时，所述PC5-RRC消息中至少包括第一信元，所述第一信元用于触发中继终端设备进入RRC连接态；
    当所述第一信令消息包括RRC重配置完成消息时，所述远端终端设备通过中继终端设备向网络侧设备发送RRC重配置完成消息，所述RRC重配置完成消息由所述远端终端设备使用缺省配置的直通链路-无线链路控制SL-RLC1发送。
  3. 根据权利要求1或2所述的方法，其中，当所述第一信令消息包括RRC重配置完成消息时，所述向中继终端设备发送第一信令消息，包括：
    当RRC重配置消息中包含非直连路径上信令无线承载SRB1的相关配置信息时，使用缺省配置的SL-RLC1向中继终端设备发送所述RRC重配置完成消息，以使处于RRC空闲态的中继终端设备执行RRC连接建立的相关操作或处于RRC非激活态的中继终端设备执行RRC连接恢复的相关操作。
  4. 根据权利要求3所述的方法，其中，所述非直连路径上SRB1的相关配置信息包括以下至少一种：在非直连路径上配置了独立的SRB1、配置了支持分离的SRB1且分离的SRB1的主RLC实体配置在非直连路径、配置了支持冗余传输的SRB1。
  5. 根据权利要求1或2所述的方法，其中，当所述第一信令消息包括PC5-RRC消息时，所述向中继终端设备发送第一信令消息，包括以下至少一种：
    当RRC重配置消息包含第二信元时，向中继终端设备发送PC5-RRC消息；或
    当RRC重配置消息中未在非直连路径上配置SRB1、或配置了分离的SRB1且分离的SRB1的主RLC实体配置未配置在非直连路径上时，远端终端设备向中继终端设备发送PC5-RRC消息；或
    当远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，向中继终端设备发送PC5-RRC消息。
  6. 根据权利要求5所述的方法，其中，当RRC重配置消息包含第二信元时，所述第二信元用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
  7. 根据权利要求5所述的方法，其中，当所述远端终端设备与中继终端设备进行交互过程中确定需要发送PC5-RRC消息时，所述向中继终端设备发送第一信令消息，包括以下至少一种：
    在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，所述远端终端设备获得中继终端设备的RRC状态信息，所述获得中继终端设备的RRC状态信息为RRC空闲态或RRC非激活态时，向所述中继终端设备发送PC5-RRC消息；或
    在远端终端设备与中继终端设备的直通链路发现过程或PC5连接建立过程中，所述中继终端设备指示远端终端设备需要发送PC5-RRC消息时，向所述中继终端设备发送PC5-RRC消息。
  8. 根据权利要求1所述的方法，其中，所述方法还包括：
    通过直连路径和/或非直连路径向所述网络侧设备发送RRC重配置完成消息。
  9. 根据权利要求8所述的方法，其中，所述通过直连路径和/或非直连路径向所述网络侧设备发送RRC重配置完成消息，包括以下至少一种：
    当RRC重配置消息中配置了支持冗余传输的分离SRB1，通过直连路径和非直连路径向所述网络侧设备发送RRC重配置完成消息；
    当RRC重配置消息中配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径，或在直连路径上配置了独立的SRB1，通过所述直连路径向所述网络侧设备发送RRC重配置完成消息；
    当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，通过所述直连路径SRB1向所述网络侧设备发送RRC重配置完成消息。
  10. 根据权利要求9所述的方法，其中，当远端终端设备需要向中继终端设备发送PC5-RRC消息，且直连路径配置了可用的SRB1时，所述直连路径配置了可用的SRB1包括以下至少一种：所述直连路径配置了独立的SRB1、或配置了支持分离SRB1且分离SRB1的主RLC实体配置在直连路径。
  11. 根据权利要求1所述的方法，其中，所述RRC重配置消息包括以下中至少一种信息：
    远端终端设备的本地ID信息；
    中继终端设备的源层二ID信息；
    直通链路中继适配协议SRAP配置信息；
    SRB1相关配置信息，所述SRB1相关配置信息包括以下至少一种：在直连路径和/或非直连路径上配置独立SRB1、配置支持分离的SRB1、配置支持冗余传输的SRB1；
    第二信元，用于指示远端终端设备需要向中继终端设备发送PC5-RRC消息。
  12. 一种触发中继终端设备进入RRC连接态的方法，其中，应用于网络侧设备，所述方法包括：
    向远端终端设备发送RRC重配置消息，以使所述远端终端设备根据所述RRC重配置消息，向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
  13. 一种触发中继终端设备进入RRC连接态的方法，其中，应用于中继终端设备，所述方法包括：
    接收远端终端设备发送的第一信令消息；
    当所述中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；
    当所述中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
  14. 一种远端终端设备，其中，包括：
    配置消息接收模块，用于接收网络侧设备发送的RRC重配置消息；
    信令消息发送模块，用于向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
  15. 一种网络侧设备，其中，包括：
    配置消息发送模块，用于向远端终端设备发送RRC重配置消息，以使所述远端终端设备根据所述RRC重配置消息，向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复。
  16. 一种中继终端设备，其中，包括：
    信令消息接收模块，用于接收远端终端设备发送的第一信令消息；
    RRC连接模块，用于当所述中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当所述中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
  17. 一种通信系统，其中，包括网络侧设备、中继终端设备和远端终端设备，其中，
    所述网络侧设备，用于向远端终端设备发送RRC重配置消息；
    所述远端终端设备，用于接收网络侧设备发送的无线资源控制RRC重配置消息；向中继终端设备发送第一信令消息，所述第一信令消息用于触发处于RRC空闲态的中继终端设备执行RRC连接建立或触发处于RRC非激活态的中继终端设备执行RRC连接恢复；
    所述中继终端设备，用于接收远端终端设备发送的第一信令消息；当所述中继终端设备处于RRC空闲态时，执行RRC连接建立的操作；当所述中继终端设备处于RRC非激活态时，执行RRC连接恢复的操作。
  18. 一种电子设备，其中，包括：
    处理器；以及
    存储器，用于存储所述处理器的可执行指令；
    其中，所述处理器配置为经由执行所述可执行指令来执行权利要求1～11中任意一项所述的触发中继终端设备进入RRC连接态的方法，或执行权利要求12所述的触发中继终端设备进入RRC连接态的方法，或执行权利要求13所述的触发中继终端设备进入RRC连接态的方法。
  19. 一种计算机可读存储介质，其上存储有计算机程序，其中，所述计算机程序被处理器执行时实现权利要求1～11中任意一项所述的触发中继终端设备进入RRC连接态的方法，或实现权利要求12所述的触发中继终端设备进入RRC连接态的方法，或实现权利要求13所述的触发中继终端设备进入RRC连接态的方法。
  20. 一种计算机程序产品，包括计算机程序，其中，所述计算机程序被处理器执行时实现权利要求1-11中任意一项所述触发中继终端设备进入RRC连接态的方法，或实现权利要求12所述的触发中继终端设备进入RRC连接态的方法，或实现权利要求13所述的触发中继终端设备进入RRC连接态的方法。
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WO2023045436A1 (zh) * 2021-09-24 2023-03-30 大唐移动通信设备有限公司 一种信息发送方法及装置

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