WO2022116820A1

WO2022116820A1 - Method and apparatus for recovering rrc connection of terminal

Info

Publication number: WO2022116820A1
Application number: PCT/CN2021/131086
Authority: WO
Inventors: 赵亚利; 张惠英
Original assignee: 大唐移动通信设备有限公司
Priority date: 2020-12-02
Filing date: 2021-11-17
Publication date: 2022-06-09
Also published as: CN114599120A

Abstract

Provided are a method and apparatus for recovering an RRC connection of a terminal. The method comprises: an anchor network device of a terminal sending instruction information to a source relay device of the terminal; and the source relay device then releasing, according to the instruction information, configuration information related to the terminal and/or a direction communication interface connection between the source relay device and the terminal. Therefore, the present application provides a solution for RRC connection recovery for a terminal that enters an RRC inactive state under non-direct connection, and fills a gap in technology in this direction. Some of the resources of a source relay device can also be saved.

Description

Method and device for terminal RRC connection recovery

technical field

The present application relates to the field of communications technologies, and in particular, to a method and apparatus for terminal radio resource control (Radio Resource Control, RRC) connection recovery.

Background technique

With the development of communication technology, the arrangement of network devices (such as base stations) has gradually increased, greatly increasing the coverage area of the mobile communication network. However, inevitably, there are still mobile signal coverage blind spots in some areas. In order to solve this problem, UE-to-Network Relay (hereinafter referred to as relay) from terminal to network equipment is introduced. The relay can be a relay function. device of. If the terminal enters the coverage of another terminal, the other terminal can act as the relay device of the terminal, wherein the relay device and the network device communicate through the Uu interface, and the terminal and the relay device communicate through the Uu interface. A direct communication link (also called Sidelink or PC5) is used for communication, so the terminal can communicate with the network device through the relay device, so as to achieve the purpose of expanding the network coverage of the network device. At this time, the connection between the terminal and the network device is an indirect connection.

The RRC state of the terminal includes the following: an idle state (idle state), an inactive state (inactive state), and a connected state (connected state). When the terminal is in the connected state, if there is no need for data transmission, the terminal can return from the connected state to the inactive state, so that the connected state can be restored more quickly in the future. However, at present, there is no relevant solution for how to recover the RRC connection for a terminal that enters the RRC inactive state under the indirect connection.

SUMMARY OF THE INVENTION

The present application provides a method and apparatus for terminal RRC connection recovery, which provides a solution for RRC connection recovery for terminals entering an RRC inactive state under indirect connection, and fills the gap in the technical direction.

In a first aspect, the present application provides a method for terminal RRC connection recovery, including:

The source relay device of the terminal receives indication information from the anchor network device of the terminal, where the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal ;

The source relay device releases the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal according to the indication information;

The anchor network device refers to a network device serving the terminal when the terminal enters the RRC inactive state, and the source relay device refers to the relay device used when the terminal accesses the anchor network device.

Optionally, the prerequisite for the anchor network device to send the indication information to the source relay device is any of the following:

The terminal uses the direct connection to initiate RRC connection recovery under the anchor network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

The terminal uses the direct connection to initiate RRC connection recovery under the target network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the target network device, and the target relay device is different from the source relay device;

The target network device is a network device that serves the terminal when the terminal initiates RRC connection recovery, and the target relay device refers to the relay device that serves the terminal when the terminal initiates RRC connection recovery;

The direct connection refers to an RRC connection established between the terminal and the network device through a Uu interface, and the non-direct connection refers to an RRC connection established between the terminal and the network device through a relay device.

Optionally, the indication information is carried through RRC signaling, a medium access control MAC control element (Control Element, CE) or physical layer signaling sent by the anchor network device to the source relay device.

Optionally, the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface Radio Link Control (RLC) channel (channel) between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor network device;

The mapping relationship between the end-to-end bearer between the terminal and the anchor network device and the direct communication interface RLC channel between the terminal and the source relay device;

Identification information of the terminal.

Optionally, the identification information of the terminal includes any one or more of the following:

The cell wireless network temporary identifier C-RNTI allocated by the anchor network device for the terminal;

The combination of source address and destination address of the direct communication interface between the terminal and the source relay device;

The combination of source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device.

Optionally, the direct communication interface connection between the source relay device and the terminal includes one or more of the following:

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

In a second aspect, the present application provides a method for terminal RRC connection recovery, including:

The anchor network device of the terminal sends indication information to the source relay device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal ;

Optionally, the indication information is carried by RRC signaling, MAC CE or physical layer signaling sent by the anchor network device to the source relay device.

The mapping relationship between the direct communication interface RLC channel between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor network device;

Identification information of the terminal.

The Cell-Radio Network Temporary Identifier (C-RNTI) assigned by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

Optionally, before the anchor network device sends the indication information to the source relay device of the terminal, it further includes:

The anchor network device receives the terminal context request message sent by the target network device of the terminal;

The target network device refers to a network device serving the terminal when the terminal initiates RRC connection recovery.

Optionally, the method further includes:

The anchor network device deletes the configuration information related to the source relay device of the terminal under the anchor network device from the locally stored terminal context/context information according to the terminal context request message;

The anchor network device sends the deleted terminal context/context information to the target network device through the interface between network devices.

Optionally, the method further includes:

The anchor network device sends the locally stored terminal context/context information to the target network device through the interface between network devices according to the terminal context request message.

The anchor network device receives the RRC connection recovery request message sent by the terminal.

Optionally, after receiving the RRC connection recovery request message from the terminal, the anchor network device further includes:

The anchor network device deletes the configuration information related to the source relay device of the terminal under the anchor network device from the locally stored terminal context/context information;

The anchor network device sends a response message corresponding to the RRC connection restoration request message to the terminal according to the deleted terminal context/context information.

In a third aspect, the present application provides an apparatus for terminal RRC connection recovery, including a memory, a transceiver and a processor;

memory for storing computer programs;

A transceiver for sending and receiving data under the control of the processor;

A processor that reads the computer program in memory and performs the following operations:

receiving indication information from the anchor point network device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal;

Release the terminal-related configuration information and/or the direct communication interface connection between the source relay device and the terminal according to the indication information;

The direct connection refers to the RRC connection established between the terminal and the network device through the Uu interface, and the indirect connection refers to the RRC connection established between the terminal and the network device through the relay device.

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

In a fourth aspect, the present application provides an apparatus for recovering a terminal RRC connection, which is applied to an anchor point network device, and the apparatus includes a memory, a transceiver, and a processor;

memory for storing computer programs;

Sending indication information to the source relay device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal;

The terminal uses a non-direct connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

Optionally, the processor is further configured to perform the following operations:

Before sending the indication information to the source relay device of the terminal, receive a terminal context request message sent by the target network device of the terminal;

The target network device refers to a network device that serves the terminal when the terminal initiates RRC connection recovery.

According to the terminal context request message, delete the configuration information related to the source relay device under the anchor network device of the terminal in the locally stored terminal context/context information;

The deleted terminal context/context information is sent to the target network device through the inter-network device interface.

According to the terminal context request message, the locally stored terminal context/context information is sent to the target network device through the interface between network devices.

Before sending the indication information to the source relay device of the terminal, receive the RRC connection restoration request message sent by the terminal.

After receiving the RRC connection recovery request message from the terminal, delete the configuration information related to the source relay device under the anchor network device of the terminal in the locally stored terminal context/context information;

According to the deleted terminal context/context information, a response message corresponding to the RRC connection restoration request message is sent to the terminal.

In a fifth aspect, the present application provides an apparatus for recovering a terminal RRC connection, including:

a receiving unit, configured to receive indication information from the anchor network device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal;

a processing unit, configured to release the terminal-related configuration information and/or the direct communication interface connection between the source relay device and the terminal according to the indication information;

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

In a sixth aspect, the present application provides an apparatus for terminal RRC connection recovery, including:

a sending unit, configured to send indication information to the source relay device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal;

Optionally, the precondition for the sending unit to send the indication information to the source relay device is any of the following:

Optionally, the indication information is carried by RRC signaling, MAC CE or physical layer signaling sent by the sending unit to the source relay device.

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

Optionally, the device further includes:

a receiving unit, configured to receive a terminal context request message sent by the target network device of the terminal before the sending unit sends the indication information to the source relay device of the terminal;

Optionally, the device further includes:

a processing unit, configured to delete the configuration information related to the source relay device under the anchor network device of the terminal from the locally stored terminal context/context information according to the terminal context request message;

The sending unit is further configured to send the deleted terminal context/context information to the target network device through the interface between network devices.

Optionally, the sending unit is further configured to send the locally stored terminal context/context information to the target network device through the interface between network devices according to the terminal context request message.

Optionally, the device further includes:

The receiving unit is configured to receive the RRC connection restoration request message sent by the terminal before the sending unit sends the indication information to the source relay device of the terminal.

Optionally, the device further includes:

a processing unit, configured to delete the configuration information related to the source relay device under the anchor network device of the terminal in the locally stored terminal context/context information after the receiving unit receives the RRC connection recovery request message from the terminal;

The sending unit is further configured to send a response message corresponding to the RRC connection restoration request message to the terminal according to the deleted terminal context/context information.

In a seventh aspect, the present application provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is used to cause a processor to execute the method described in the first aspect or the second aspect.

In an eighth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method according to any one of the first aspect or the second aspect.

In a ninth aspect, the present application provides a terminal RRC connection recovery system, including the anchor point network device as described in any of the above and the source relay device as described in any of the above.

The present application provides a method and apparatus for recovering an RRC connection of a terminal. An anchor point network device of a terminal sends indication information to a source relay device of the terminal, and then the source relay device releases the configuration information and/or source relay device related to the terminal according to the indication information. A direct communication interface connection between the relay device and the terminal. Therefore, the present application provides a related solution for how the terminal in the RRC inactive state requests to restore the RRC connection when the terminal enters the RRC inactive state through the source relay device under the anchor network device. Part of the resources of the source relay device can also be saved.

It should be understood that the content described in the above summary section is not intended to limit the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become apparent from the following description.

Description of drawings

In order to illustrate the technical solutions in the present application or the prior art more clearly, the following briefly introduces the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are the For some embodiments of the invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

FIG. 2 is a flowchart of a method for terminal RRC connection recovery provided by an embodiment of the present application;

3 is a flowchart of a method for terminal RRC connection recovery provided by another embodiment of the present application;

4 is a flowchart of a method for terminal RRC connection recovery provided by another embodiment of the present application;

5 is a flowchart of a method for terminal RRC connection recovery provided by another embodiment of the present application;

6 is a schematic structural diagram of an apparatus for terminal RRC connection recovery provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an apparatus for terminal RRC connection recovery provided by another embodiment of the present application;

8 is a schematic structural diagram of an apparatus for terminal RRC connection recovery provided by another embodiment of the present application;

FIG. 9 is a schematic structural diagram of an apparatus for recovering a terminal RRC connection according to another embodiment of the present application.

Detailed ways

In this application, the term "and/or" describes the relationship between related objects, and means that there can be three relationships, for example, A and/or B, which can mean that A exists alone, A and B exist simultaneously, and B exists alone. a situation. The character "/" generally indicates that the associated objects are an "or" relationship.

In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The embodiments of the present application provide a method and apparatus for terminal RRC connection recovery. When the terminal is in the RRC inactive state, the network device serving the terminal when the terminal enters the RRC inactive state is called the anchor network device, and the terminal accesses the anchor point. The relay device used by the network device is the source relay device. If the terminal initiates RRC connection recovery, the terminal's source relay device receives the indication information from the terminal's anchor network device, and then the source relay device releases the terminal-related configuration according to the indication information. A direct communication interface connection between the information and/or source relay device and the terminal. Therefore, the present application provides a solution for RRC connection recovery for a terminal entering an RRC inactive state under an indirect connection, which fills the gap in the technical direction. In addition, some resources of the source relay device are also saved.

The method and the device are conceived based on the same application. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated here.

The technical solutions provided in the embodiments of the present application can be applied to various systems, especially 5G systems. For example, applicable systems may be Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) general packet Wireless service (General Packet Radio Service, GPRS) system, Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, Long Term Evolution Advanced (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc. Terminals and network equipment are included in these various systems. The system may also include a core network part, such as an evolved packet system (Evloved Packet System, EPS), a 5G system (5GS), and the like.

The terminal involved in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the terminal may be different. For example, in the 5G system, the terminal may be called user equipment (User Equipment, UE). A wireless terminal may communicate with one or more core networks (Core Network, CN) via a Radio Access Network (RAN), and the wireless terminal may be a mobile terminal, such as a mobile phone (or "cellular" phone) and computers with mobile terminals, which may be portable, pocket-sized, hand-held, computer built-in or vehicle mounted mobile devices, for example, which exchange language and/or data with the wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (Personal Digital Assistants), PDA) and other devices. A wireless terminal may also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, A remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device) are not limited in the embodiments of the present application.

The network device involved in the embodiments of the present application may be a base station, and the base station may include a plurality of cells providing services for the terminal. Depending on the specific application, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal through one or more sectors on an air interface, or other names. The network equipment can be used to exchange received air frames with Internet Protocol (IP) packets, and act as a router between the wireless terminal and the rest of the access network, which may include the Internet Protocol (IP) communication network. The network devices may also coordinate attribute management for the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA). ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a Long Term Evolution (LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in 5G network architecture (next generation system), or Home evolved Node B (HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., which are not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (Centralized Unit, CU) node and a distributed unit (Distributed Unit, DU) node, and the centralized unit and the distributed unit may also be geographically separated.

One or more antennas can be used between the network device and the terminal for multiple input multiple output (Multi Input Multi Output, MIMO) transmission, and the MIMO transmission can be single user MIMO (Single User MIMO, SU-MIMO) or multi-user MIMO ( Multiple User MIMO, MU-MIMO). According to the form and number of root antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission.

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application. As shown in FIG. 1 , this embodiment provides a communication system, where the communication system includes multiple network devices and multiple terminals. In this embodiment, 2 Take one network device and six terminal devices as an example, the network devices are the network device 110 and the network device 160 respectively.

The terminal 120 and the terminal 150 are within the coverage of the network device 110, and the signal quality from the network device 110 received by the terminal 120 and the terminal 150 is good. The terminal 120 and the terminal 150 are directly connected to the network device 110 through the Uu interface, that is, the terminal 120, the terminal 150 and the network device 110 can transmit uplink and downlink data/control information through the Uu interface. A direct (direct) connection communicates with the network device 110, that is, the connection mode of the terminal 120 and the terminal 150 under the network device 110 is a direct connection. The terminal 170 is also similar to the network device 160 .

In some cases, the terminal 130 is out of coverage of the network device 110 , and the terminal 130 cannot receive signals from the network device 110 . If the terminal 130 wants to communicate with the network device 110, the terminal 130 may use the terminal 120 within a short range as a relay device to establish a direct communication link (also called Sidelink or PC5) with the terminal 120. The terminal 130 is connected to the network device 110 through the terminal 120 as a relay device, and this connection method is also called an indirect connection.

In other cases, the terminal 140 is in the edge coverage of the network device 110, and the terminal 140 can receive the signal from the network device 110, but the signal quality is poor. Therefore, the terminal 140 may also use the terminal 150 within a short range as a relay device to establish a direct communication link (also called Sidelink or PC5) with the terminal 150. The terminal 140 is connected to the network device 110 through the terminal 150 as a relay device, and this connection method is also called an indirect connection.

The wireless interface corresponding to the direct communication link is called a direct communication interface (also called a Sidelink interface or a PC5 interface). The link between the terminal 120 serving as the relay device and the network device 110 may be referred to as a backhaul link for the terminal 130 .

In addition, for how the terminal 180 communicates with the network device 160 through the terminal 150, reference may be made to the communication between the terminal 130 and the network device 110 through the terminal 120.

The RRC state of the terminal includes the following: an idle state (idle state), an inactive state (inactive state), and a connected state (connected state). When the terminal 130 is in the connected state, if there is no data transmission requirement, for example, when the user does not use the terminal 130 for a long time, the terminal 130 returns from the connected state to the RRC inactive state, so as to restore the connected state more quickly. When the terminal 130 in the RRC inactive state moves to the location of the terminal 120 , the terminal 130 is within the direct coverage of the network device 110 , and the terminal 130 can communicate directly with the network device 110 . Alternatively, when the terminal 130 in the RRC inactive state moves to the location of the terminal 140, the terminal 130 is within the coverage of the terminal 150, and the terminal 130 can indirectly communicate with the network device 110 through the terminal 150 serving as a relay device. Alternatively, when the terminal 130 in the RRC inactive state moves to the location of the terminal 170 , the terminal 130 moves to the direct coverage of the network device 160 , and the terminal 130 can communicate directly with the network device 110 . Alternatively, when the terminal 130 in the RRC inactive state moves to the location of the terminal 180, the terminal 130 is within the coverage of the terminal 170, and the terminal 130 can indirectly communicate with the network device 160 through the terminal 170 serving as a relay device. Since the terminal 130 enters the RRC inactive state through the terminal 120 as a relay device under the network device 110, and the terminal 130 has moved out of the communication range with the terminal 120, at this time, if the terminal 130 needs data transmission, it needs to restore the RRC connect. In order to solve this requirement, the technical solution of the present application can be adopted. The technical solutions are described in detail below using various embodiments.

FIG. 2 is a flowchart of a method for terminal RRC connection recovery provided by an embodiment of the present application. As shown in FIG. 2 , the method in this embodiment may include:

S201. The anchor network device sends indication information to the source relay device. Correspondingly, the source relay device receives the indication information sent by the anchor network device.

In this embodiment, the terminal is a terminal in an RRC inactive state, wherein a network device serving the terminal when the terminal enters the RRC inactive state is called an anchor network device of the terminal. The relay device used when the terminal accesses the anchor point network device of the terminal is called a source relay device, where the relay device may be a terminal or a network device, which is not limited in this embodiment. That is to say, the terminal enters the RRC inactive state under the anchor network device of the terminal, and the connection used when the terminal enters the RRC inactive state under the anchor network device of the terminal is an indirect connection (indirect connection). Refers to the RRC connection established between the terminal and the terminal's anchor network device through the terminal's source relay device.

The process for the terminal to enter the RRC inactive state may be: the anchor point network device of the terminal sends the information for indicating entering the RRC inactive state to the terminal through the source relay device of the terminal, and the terminal receives the information through the source relay device of the terminal. The information from the anchor network device, the terminal enters the RRC inactive state according to the information.

After the terminal enters the RRC inactive state, the terminal will move. It may move to the direct coverage of the network device or other network devices, or it may move to the signal of other devices except the source relay device of the terminal. within coverage. At this time, when the terminal in the RRC inactive state has data transmission requirements, the terminal needs to restore the RRC connection, and may no longer need to rely on the source relay device of the terminal. The anchor network device of the terminal may send indication information to the source relay device of the terminal, where the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal . Correspondingly, the source relay device of the terminal receives the above-mentioned indication information sent by the anchor network device of the terminal.

In an optional example, the above-mentioned indication information is carried by RRC signaling, MAC CE or physical layer signaling sent by the anchor point network device of the terminal to the source relay device of the terminal. Specifically, the anchor point network device of the terminal sends RRC signaling or MAC CE or physical layer signaling to the source relay device of the terminal, and the above indication information is carried in the RRC signaling or MAC CE or physical layer signaling. Correspondingly, the source relay device of the terminal receives the RRC signaling or MAC CE or physical layer signaling sent by the anchor network device of the terminal, and obtains the above-mentioned indication information carried in the RRC signaling or MAC CE or physical layer signaling.

S202: The source relay device releases the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal according to the indication information.

In this embodiment, after receiving the indication information sent by the anchor network device of the terminal, the source relay device of the terminal releases the configuration information related to the terminal according to the indication information, or releases the configuration information between the source relay device of the terminal and the terminal. Direct communication interface connection, or release the configuration information related to the terminal and release the direct communication interface connection between the source relay device of the terminal and the terminal. As the terminal moves, the terminal may no longer access the terminal's anchor network device through the terminal's source relay device, so the terminal's source relay device does not need to retain the terminal-related configuration information and/or source relay device. Connect with the direct communication interface between the terminals to save some resources of the source relay device.

In an optional example, the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface RLC channel (channel) between the terminal and the source relay device of the terminal and the Uu interface RLC channel between the source relay device of the terminal and the anchor network device of the terminal; that is, the above The mapping relationship between the direct communication interface RLC channel and the above-mentioned Uu interface RLC channel.

The mapping relationship between the end-to-end bearer between the terminal and the terminal's anchor network device and the direct communication interface RLC channel between the terminal and the source relay device of the terminal; that is, the above-mentioned end-to-end bearer and the above-mentioned direct communication Mapping relationship between interface RLC channels.

Identification information of the terminal.

The cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI) allocated by the terminal's anchor network device for the terminal;

The combination of source address and destination address of the direct communication interface between the terminal and the source relay device of the terminal;

The combination of the source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device of the terminal.

In an optional example, the direct communication interface connection between the source relay device of the terminal and the terminal includes one or more of the following:

PC5-S connection between the source relay device of the terminal and the terminal;

PC5-RRC connection between the source relay device of the terminal and the terminal.

In the method for terminal RRC connection recovery provided in this embodiment, the anchor point network device of the terminal sends indication information to the source relay device of the terminal, and then the source relay device of the terminal releases the configuration information and/or source relay device related to the terminal according to the indication information A direct communication interface connection between the relay device and the terminal. Therefore, the present application provides a related solution for how the terminal in the RRC inactive state requests to restore the RRC connection when the terminal enters the RRC inactive state through the source relay device under the terminal's anchor network device. Part of the resources of the source relay device can also be saved.

Based on the above embodiment, in an optional embodiment, the precondition for the anchor network device of the terminal to send the indication information to the source relay device of the terminal is any of the following:

The terminal initiates RRC connection recovery using direct connection under the anchor point network device of the terminal;

The terminal uses an indirect connection to initiate RRC connection recovery under the terminal's anchor network device, and the target relay device is different from the source relay device;

The terminal initiates RRC connection recovery using direct connection under the target network device of the terminal;

The terminal initiates RRC connection recovery using an indirect connection under the target network device of the terminal, and the target relay device of the terminal is different from the source relay device of the terminal;

Among them, the target network device is the network device that serves the terminal when the terminal initiates RRC connection recovery; the target relay device refers to the relay device that serves the terminal when the terminal initiates the RRC connection recovery; the direct connection refers to the terminal and the network device through the Uu interface The established RRC connection, the indirect connection refers to the RRC connection established between the terminal and the network device through the relay device.

In this embodiment, any of the above preconditions means that the terminal does not need to go through the source relay device of the terminal when the terminal initiates RRC connection recovery. Therefore, the anchor network device of the terminal instructs the source relay device of the terminal to release the terminal-related configuration information and/or the terminal. Or a direct communication interface connection between the source relay device and the terminal, which not only ensures that the RRC connection recovery of the terminal is not affected, but also saves some resources of the source relay device of the terminal in time.

On the basis of the foregoing embodiments, in an optional embodiment, before executing the foregoing S201, S200 may also be executed:

S200. The terminal sends an RRC connection recovery request message to the anchor network device. Correspondingly, the anchor network device receives the RRC connection restoration request message sent by the terminal.

In this embodiment, when the terminal needs to transmit data, it needs to initiate RRC connection recovery. Specifically, if the terminal can still communicate with the anchor point network device of the terminal, the terminal sends an RRC connection recovery request message to the anchor point network device of the terminal.

In a possible implementation manner, if the terminal is within the direct coverage of the anchor point network device of the terminal, the connection mode used by the terminal under the anchor point network device of the terminal is direct connection, and the direct connection refers to the connection between the terminal and the terminal. The anchor point network device establishes the RRC connection through the Uu interface, and the terminal initiates the RRC connection recovery by using the direct connection under the anchor point network device of the terminal. That is, the terminal sends an RRC connection recovery request message to the anchor point network device of the terminal through the Uu interface. Correspondingly, the anchor network device of the terminal receives the RRC connection recovery request message sent by the terminal through the Uu interface, so that it can be determined that the terminal does not initiate RRC connection recovery through the source relay device of the terminal, so the anchor network device can perform the above S201.

In another possible implementation manner, if the terminal is within the coverage of the anchor point network device of the terminal through the target relay device of the terminal, the target relay device of the terminal is different from the source relay device of the terminal, and the terminal is located in the target relay device of the terminal. The connection mode used under the terminal's anchor network device is an indirect connection, which refers to the RRC connection established between the terminal and the terminal's anchor network device through the target relay device, and the terminal is used under the terminal's anchor network device. A non-direct connection initiates RRC connection recovery. That is, the terminal sends the RRC connection recovery request message to the target relay device of the terminal, and the target relay device of the terminal forwards the RRC connection recovery request message sent by the terminal to the anchor network device of the terminal. Correspondingly, the anchor network device of the terminal receives the RRC connection recovery request message forwarded by the target relay device of the terminal, so that it can be determined that the terminal does not initiate RRC connection recovery through the source relay device of the terminal, so the anchor network device of the terminal can execute The above S201.

Optionally, after receiving the RRC connection recovery request message sent by the terminal, the anchor point network device of the terminal deletes, from the locally stored terminal context/context information, that the terminal is related to the source relay device of the terminal under the anchor point network device of the terminal. Then, according to the terminal context/context information after deletion of the above configuration information, a response message corresponding to the RRC connection recovery request message is sent to the terminal. The response message is, for example, an RRC connection recovery message or an RRC connection reestablishment message. Correspondingly, the terminal restores the RRC connection according to the response message to enter the RRC connected state, thereby ensuring that the terminal can normally restore from the RRC inactive state to the RRC connected state.

On the basis of the foregoing embodiments, in another optional embodiment, before executing the foregoing S201, S200' may also be executed:

S200': The target network device sends a terminal context request message to the anchor network device.

In this embodiment, when the terminal needs to transmit data, it needs to initiate RRC connection recovery. Specifically, if the terminal moves within the range of establishing a connection with the target network device of the terminal, the terminal sends an RRC connection restoration request message to the target network device of the terminal.

In a possible implementation manner, if the terminal is within the direct coverage of the target network device of the terminal, the connection method used by the terminal under the target network device of the terminal is direct connection, and the direct connection refers to the target of the terminal and the terminal. The RRC connection established by the network device through the Uu interface, the terminal initiates the RRC connection recovery by using the direct connection under the target network device of the terminal. That is, the terminal sends an RRC connection recovery request message to the target network device of the terminal through the Uu interface. Correspondingly, the target network device of the terminal receives the RRC connection restoration request message sent by the terminal through the Uu interface.

In another possible implementation manner, if the terminal is within the coverage of the target network device of the terminal through the target relay device of the terminal, the target relay device of the terminal is different from the source relay device of the terminal, and the terminal is located in the terminal. The connection mode used under the target network device of the terminal is an indirect connection. The indirect connection refers to the RRC connection established between the terminal and the target network device of the terminal through the target relay device of the terminal. The terminal uses the indirect connection under the target network device of the terminal. The connection initiates RRC connection recovery. That is, the terminal sends the RRC connection recovery request message to the target relay device of the terminal, and the target relay device of the terminal forwards the RRC connection recovery request message sent by the terminal to the target network device of the terminal. Correspondingly, the target network device of the terminal receives the RRC connection restoration request message forwarded by the target relay device of the terminal.

After receiving the RRC connection restoration request message sent by the terminal, the target network device of the terminal needs to acquire terminal context/context information from the anchor network device of the terminal. Specifically, the target network device of the terminal sends a terminal context request message to the anchor network device of the terminal through the inter-network device interface, where the terminal context request message is used to request to obtain terminal context/context information of the terminal. Correspondingly, after receiving the terminal context request message sent by the target network device of the terminal, the anchor network device of the terminal can determine that the terminal is likely to initiate RRC connection recovery to the target network device of the terminal, so that it can be determined that the terminal does not pass the source relay. The device initiates RRC connection recovery, so the anchor point network device of the terminal can perform the above S201.

Optionally, in a possible implementation manner, after receiving the terminal context request message, the anchor network device of the terminal deletes the connection between the terminal and the terminal under the anchor network device of the terminal in the locally stored terminal context/context information. The configuration information related to the source relay device is then sent to the target network device through the interface between network devices to delete the terminal context/context information of the configuration information. The target network device of the terminal receives the terminal context/context information after the configuration information is deleted and sent by the anchor point network device of the terminal through the inter-network device interface, and sends an RRC connection recovery request message to the terminal according to the received terminal context/context information. response message. The response message is, for example, an RRC connection recovery message or an RRC connection reestablishment message. Correspondingly, the terminal restores the RRC connection according to the response message to enter the RRC connected state, thereby ensuring that the terminal can normally restore from the RRC inactive state to the RRC connected state.

Optionally, in another possible implementation manner, after receiving the terminal context request message, the anchor network device of the terminal sends the locally stored terminal context/context information to the target network device of the terminal through an interface between network devices. . The target network device of the terminal receives the terminal context/context information sent by the anchor network device of the terminal through the inter-network device interface, and deletes the terminal from the received terminal context/context information under the anchor network device of the terminal and the source of the terminal. Following the configuration information related to the device, and then according to the terminal context/context information after deleting the configuration information, a response message corresponding to the RRC connection restoration request message is sent to the terminal. The response message is, for example, an RRC connection recovery message or an RRC connection reestablishment message. Correspondingly, the terminal restores the RRC connection according to the response message to enter the RRC connected state, thereby ensuring that the terminal can normally restore from the RRC inactive state to the RRC connected state.

The solution of the present application is illustrated below with three specific examples, and the terminal may be referred to as a UE.

3 is a flowchart of a method for terminal RRC connection recovery provided by another embodiment of the present application. In this embodiment, the UE initiates RRC connection recovery using a direct connection (direct connection) under the UE's anchor network device. As shown in FIG. 3, the method of this embodiment may include:

S301. The UE sends an RRC connection recovery request message to the anchor network device.

In this embodiment, the UE first accesses the network through the source relay device of the UE. If the UE has no data transmission requirements, the network device can make the UE enter the RRC inactive state (RRC_INACTIVE state). The network device connected when the UE enters the RRC_INACTIVE state is called It is the anchor network device of the UE.

As the UE moves, the UE enters the direct coverage of the UE's anchor network equipment. Once the UE has data transmission requirements, the UE can directly initiate RRC connection recovery through the Uu interface. A specific UE may directly send an RRC connection resume request message, such as an RRC Resume Request message, to the UE's anchor network device through the Uu interface.

S302. The anchor network device processes the UE context/context information.

In this embodiment, after receiving the RRC connection resumption request message (such as the RRC Resume Request message) sent by the UE, the anchor network device of the UE determines that the UE performs RRC connection resumption through the direct connection, and uses the context/context information of the UE to perform RRC connection resumption. Delete the UE's configuration information related to the UE's source relay device under the UE's anchor network device. A response message corresponding to the RRC connection restoration request message is generated according to the processed UE context/context information.

S303. The anchor network device sends a notification message to the source relay device.

S304: The source relay device releases the UE-related configuration information and/or the direct communication interface connection between the source relay device and the UE.

It should be noted that in this embodiment, there is no strict sequence between S303 and S301/S302.

In this embodiment, the anchor network device of the UE sends a notification message to the source relay device of the UE to notify the source relay device of the UE to release the configuration information related to the UE and/or the relationship between the source relay device and the UE. direct communication interface connection between. specific:

Specifically, RRC may be used when “the anchor network device of the UE notifies the source relay device of the UE to release the configuration information related to the UE, and/or the direct communication interface connection between the source relay device and the UE” Signaling, MAC CE or physical layer signaling.

"The UE-related configuration information" specifically includes but is not limited to one or a combination of the following:

The mapping relationship between Uu RLC channel and PC5 RLC channel;

The identity information of the UE; the identity information of the UE can be the end-to-end identity information of the UE on the Uu interface (such as: C-RNTI) or the identity information of the UE PC5 interface (such as: the combination of source address + destination address or source address + destination address + combination of transfer types).

The above-mentioned "direct communication interface connection between the source relay device and the UE" may refer to a PC5-S (PC5-signalling) connection and/or a PC5-RRC connection between the relay device and the UE.

S305: The anchor network device sends a response message corresponding to the RRC connection recovery request message to the UE.

In this embodiment, the anchor network device of the UE generates a response message (such as an RRC Resume message) corresponding to the RRC connection restoration request message according to the UE context/context information processed in S302, and then sends the RRC connection restoration to the UE through the Uu interface The response message corresponding to the request message.

Among them, there is no strict sequence between S305 and S303-S304.

In the method for terminal RRC connection recovery provided in this embodiment, the UE in the RRC_INACTIVE state initiates RRC connection recovery to the UE's anchor network device through a direct connection, and the UE's anchor network device notifies the UE's source relay device to release the UE-related configuration information and/or a direct communication interface connection between the source relay device and the UE to save part of the resources of the source relay device of the UE, and the anchor network device of the UE processes the UE context/context information and sends it to the UE A response message to indicate that the UE is allowed to resume the RRC connection to complete the UE's recovery from the RRC_INACTIVE state back to the RRC_CONNECTED state.

4 is a flowchart of a method for terminal RRC connection recovery provided by another embodiment of the present application. In this embodiment, the UE initiates RRC connection recovery using an indirect connection (indirect connection) under the UE's anchor network device. As shown in FIG. 4 , the method of this embodiment may include:

S401. The UE sends an RRC connection recovery request message to the target relay device.

S402. The target relay device forwards the RRC connection recovery request message to the anchor network device.

First, the UE accesses the network through the UE's source relay device. If the UE has no data transmission requirements, the network device can let the UE enter the RRC_INACTIVE state. The network device connected when the UE enters the RRC_INACTIVE state is called the UE's anchor network device.

As the UE moves, the UE enters the coverage of the target relay device under the UE's anchor network device. Once the UE has data transmission requirements, the UE can send an RRC connection to the UE's anchor network device through the UE's target relay device. Resume request message, such as RRC Resume Request message.

S403, the anchor network device processes the UE context/context information

After the UE's anchor network device receives the RRC connection recovery request message sent by the UE through the UE's target relay device, the UE's anchor network device deletes the UE's connection with the UE under the UE's anchor network device from the UE context/context information. Configuration information related to the source relay device.

S404. The anchor network device sends a notification message to the source relay device.

It should be noted that, in this embodiment, there is no strict sequence between S404 and S403/S406/S407.

S405: The source relay device releases the UE-related configuration information and/or the direct communication interface connection between the source relay device and the UE.

The anchor network device of the UE sends a notification message to the source relay device of the UE to notify the source relay device of the UE to release the UE-related configuration information and/or the direct communication interface between the source relay device and the UE connect. specific:

Specifically, RRC signaling may be used when "the anchor point network device of the UE notifies the source relay device of the UE to release the UE-related configuration information and/or the direct communication interface connection between the source relay device and the UE" , MAC CE or physical layer signaling.

The mapping relationship between Uu RLC channel and PC5 RLC channel;

The "direct communication interface connection between the source relay device and the UE" may refer to a PC5-S (PC5-signalling) connection and/or a PC5-RRC connection between the source relay device and the UE.

S406: The anchor network device sends a response message corresponding to the RRC connection recovery request message to the target relay device.

S407. The target relay device forwards the response message corresponding to the RRC connection recovery request message to the UE.

In this embodiment, the anchor point network device of the UE generates a response message (such as an RRC Resume message) corresponding to the RRC connection recovery request message according to the UE context/context information processed in S403, and then sends a message to the UE through the target relay device of the UE to the UE. Send a response message corresponding to the RRC connection recovery request message.

In the method for terminal RRC connection recovery provided by this embodiment, the UE in the RRC_INACTIVE state initiates RRC connection recovery to the UE's anchor network device through an indirect connection, and the UE's anchor network device notifies the UE's source relay device to release the UE-related The configuration information and/or the direct communication interface connection between the source relay device and the UE, so as to save some resources of the source relay device of the UE, and the UE's anchor network device processes the UE context/context information. The target relay device sends a response message to the terminal UE to indicate that the UE is allowed to resume the RRC connection, so as to complete the recovery of the UE from the RRC_INACTIVE state back to the RRC_CONNECTED state.

5 is a flowchart of a method for terminal RRC connection recovery provided by another embodiment of the present application. In this embodiment, the UE initiates RRC connection recovery using an indirect connection (indirect connection) under the target network device of the UE. As shown in FIG. 5 , the method of this embodiment may include:

S501. The UE sends an RRC connection recovery request message to the target relay device.

S502. The target relay device forwards the RRC connection recovery request message to the anchor network device.

As the UE moves, the UE enters the coverage area of the target relay device under the target network device of the UE. Once the UE has data transmission requirements, the UE can send an RRC connection recovery request to the target network device of the UE through the target relay device of the UE. , such as the RRC Resume Request message.

S503. The target network device sends a UE context request message to the anchor network device.

After receiving the RRC connection recovery request message sent by the UE, the target network device of the UE sends a UE context request message (UE context request message) to the anchor network device of the UE through the interface between network devices (such as the Xn interface between base stations). Taking the NR system as an example, the UE context request message may be RETRIEVE UE CONTEXT REQUEST.

S504, the anchor network device processes the UE context/context information.

S505. The anchor network device sends UE context/context information to the target network device.

After the UE's anchor network device receives the UE context request message through the inter-network device interface, the UE's anchor network device can use any of the following operations:

Mode 1: After the UE's anchor network device receives the UE context/context (UE context) request message sent by the UE's target network device, it deletes the UE's connection with the source relay device under the anchor network device from the UE context/context information. related configuration information, and then send the processed UE context/context information to the target network device of the UE through an interface between network devices (such as an Xn interface).

Mode 2: After receiving the UE context/context (UE context) request message sent by the target network device of the UE, the anchor network device of the UE directly stores it on the UE through the interface (such as the Xn interface) between the network devices. The following information is sent to the target network device of the UE, and the target network device of the UE deletes the configuration information related to the source relay device of the UE under the anchor network device of the UE.

It should be noted that, in the flowchart shown in FIG. 5 , the above-mentioned mode 1 is used as an example for description.

S506. The anchor network device sends a notification message to the source relay device.

It should be noted that, in this embodiment, there is no strict sequence between S506 and S504/S507/S508/S509.

S507: The source relay device releases the UE-related configuration information and/or the direct communication interface connection between the source relay device and the UE.

Specifically, RRC signaling may be used when "the anchor network device of the UE notifies the source relay device of the UE to release the configuration information related to the UE and/or the direct communication interface connection between the source relay device and the UE" , MAC CE or physical layer signaling.

The mapping relationship between Uu RLC channel and PC5 RLC channel;

S508: The target network device sends a response message corresponding to the RRC connection restoration request message to the target relay device.

S509: The target relay device forwards the response message corresponding to the RRC connection recovery request message to the UE.

The target network device of the UE generates a response message (such as an RRC Resume message) corresponding to the RRC connection recovery request message according to the UE context/context information obtained in S505, and then sends the RRC connection recovery request message corresponding to the RRC connection recovery request message to the UE through the target relay device of the UE. response message.

In the method for terminal RRC connection recovery provided in this embodiment, the UE in the RRC_INACTIVE state initiates RRC connection recovery to the UE's target network device through an indirect connection, and the UE's target network device obtains UE context/context information from the UE's anchor network device , the anchor network device of the UE notifies the source relay device of the UE to release the UE-related configuration information and/or the direct communication interface connection between the source relay device and the UE, so as to save some resources of the source relay device of the UE, and The target network device of the UE sends a response message to the UE through the target relay device of the UE according to the UE context/context information to indicate that the UE is allowed to resume the RRC connection, so as to complete the recovery of the UE from the RRC_INACTIVE state to the RRC_CONNECTED state.

On the relay side, an embodiment of the present application provides an apparatus for restoring a terminal RRC connection. As shown in FIG. 6 , the apparatus for restoring a terminal RRC connection in this embodiment may be the source relay device of the terminal, and the source relay device Taking the terminal as an example, the apparatus for recovering the RRC connection of the terminal may include a transceiver 601 , a processor 602 and a memory 603 .

The transceiver 601 is used to receive and transmit data under the control of the processor 602 .

6, the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors represented by processor 602 and various circuits of memory represented by memory 603 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 601 may be a number of elements, including a transmitter and a receiver, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like Transmission medium. Optionally, the data transmission control device may also include a user interface 604. For different user equipment, the user interface 604 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a Microphone, joystick, etc.

The processor 602 is responsible for managing the bus architecture and general processing, and the memory 603 may store data used by the processor 602 in performing operations.

Optionally, the processor 602 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable integrated circuit (ASIC). Programmable Logic Device (Complex Programmable Logic Device, CPLD), the processor can also adopt a multi-core architecture.

The processor 602 invokes the computer program stored in the memory 603 to execute any one of the methods on the terminal provided by the embodiments of the present application according to the obtained executable instructions. The processor 602 and the memory 603 may also be arranged physically separately.

Specifically, the processor 602 is configured to perform the following operations:

Receive instruction information from the anchor point network device of the terminal, wherein the instruction information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal;

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

It should be noted here that the above-mentioned apparatus provided by the present application can implement all the method steps implemented by the source relay device of the terminal in the above-mentioned method embodiments, and can achieve the same technical effect, which is not described in this embodiment. The same parts and beneficial effects as those in the method embodiment will be described in detail.

On the network side, an embodiment of the present application provides an apparatus for recovering a terminal RRC connection. As shown in FIG. 7 , the apparatus for recovering a terminal RRC connection in this embodiment may be an anchor point network device of a terminal, and the apparatus for recovering a terminal RRC connection Including: transceiver 701 , processor 702 and memory 703 .

The transceiver 701 is used to receive and transmit data under the control of the processor 702 .

Wherein, in FIG. 7 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 702 and various circuits of memory represented by memory 703 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface. Transceiver 701 may be multiple elements, including a transmitter and a receiver, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like. The processor 702 is responsible for managing the bus architecture and general processing, and the memory 703 may store data used by the processor 702 in performing operations.

The processor 702 may be a CPU, an ASIC, an FPGA or a CPLD, and the processor may also adopt a multi-core architecture.

The processor 702 invokes the computer program stored in the memory 703 to execute any one of the methods related to the target network device provided in the embodiments of the present application according to the obtained executable instructions. The processor and memory may also be physically separated.

Specifically, the processor 702 is configured to perform the following operations:

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

Optionally, the processor 702 is further configured to perform the following operations:

It should be noted here that the above-mentioned apparatus provided in the present application can implement all the method steps implemented by the anchor point network device of the terminal in the above-mentioned method embodiments, and can achieve the same technical effect, which is no longer described in this embodiment. The same parts and beneficial effects as those in the method embodiment will be described in detail.

On the relay side, an embodiment of the present application further provides a terminal RRC connection recovery apparatus. As shown in FIG. 8 , the terminal RRC connection recovery apparatus in this embodiment may be the source relay device of the terminal, and the terminal RRC connection recovery The apparatus includes: a receiving unit 801 and a processing unit 802.

A receiving unit 801, configured to receive indication information from the anchor network device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal ;

A processing unit 802, configured to release the terminal-related configuration information and/or the direct communication interface connection between the source relay device and the terminal according to the indication information;

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

On the network side, an embodiment of the present application also provides a terminal RRC connection recovery apparatus. As shown in FIG. 9 , the terminal RRC connection recovery apparatus in this embodiment may be the anchor point network device of the terminal. The apparatus includes: a sending unit 901 .

A sending unit 901, configured to send indication information to the source relay device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal ;

Optionally, the precondition for the sending unit 901 to send the indication information to the source relay device is any of the following:

Optionally, the indication information is carried by the RRC signaling, MAC CE or physical layer signaling sent by the sending unit 901 to the source relay device.

Identification information of the terminal.

The C-RNTI allocated by the anchor network device to the terminal;

PC5-S connection between source relay device and terminal;

PC5-RRC connection between the source relay device and the terminal.

Optionally, the apparatus further includes: a receiving unit 902 .

The receiving unit 902 is configured to receive the terminal context request message sent by the target network device of the terminal before the sending unit 901 sends the indication information to the source relay device of the terminal;

Optionally, the apparatus further includes: a processing unit 903 .

The processing unit 903 is configured to delete the configuration information related to the source relay device under the anchor network device of the terminal from the locally stored terminal context/context information according to the terminal context request message;

The sending unit 901 is further configured to send the deleted terminal context/context information to the target network device through the interface between network devices.

Optionally, the sending unit 901 is further configured for the anchor network device to send the locally stored terminal context/context information to the target network device through the interface between network devices according to the terminal context request message.

Optionally, the apparatus further includes: a receiving unit 902 .

The receiving unit 902 is configured to receive the RRC connection restoration request message sent by the terminal before the sending unit 901 sends the indication information to the source relay device of the terminal.

Optionally, the apparatus further includes: a processing unit 903 .

The processing unit 903 is configured to delete the configuration information related to the source relay device under the anchor network device of the terminal in the locally stored terminal context/context information after the receiving unit 902 receives the RRC connection recovery request message from the terminal;

The sending unit 901 is further configured to send a response message corresponding to the RRC connection restoration request message to the terminal according to the deleted terminal context/context information.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

On the relay side, an embodiment of the present application provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is used to make the processor execute the source relay of the terminal provided by the embodiment of the present application any of the methods of the apparatus. The processor can implement all the method steps implemented by the source relay device of the terminal in the above method embodiments, and can achieve the same technical effects, and the same parts and beneficial effects as the method embodiments in this embodiment will not be performed here. Describe in detail.

On the network side, an embodiment of the present application provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, and the computer program is used to make the processor execute the anchor network device of the terminal provided by the embodiment of the present application of any of the described methods. The processor can implement all the method steps implemented by the anchor point network device of the terminal in the above method embodiments, and can achieve the same technical effects, and the same parts and beneficial effects as the method embodiments in this embodiment will not be performed here. Describe in detail.

On the relay side, an embodiment of the present application provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements all the method steps implemented by the source relay device in the above method embodiments, and can achieve the same In this embodiment, the same parts and beneficial effects as those in the method embodiment will not be described in detail here.

On the network side, the embodiments of the present application provide a computer program product, including a computer program. When the computer program is executed by a processor, it implements all the method steps implemented by the anchor point network device of the terminal in the above method embodiments, and can achieve For the same technical effects, the same parts and beneficial effects in this embodiment as those in the method embodiment will not be described in detail here.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memory (eg, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)), etc.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowcharts and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the processor-readable memory result in the manufacture of means including the instructions product, the instruction means implements the functions specified in the flow or flow of the flowchart and/or the block or blocks of the block diagram.

These processor-executable instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process that Execution of the instructions provides steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A method for terminal radio resource control RRC connection recovery, characterized in that the method includes:

The source relay device of the terminal receives indication information from the anchor network device of the terminal, where the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the source relay a direct communication interface connection between the device and the terminal;

The source relay device releases the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal according to the indication information;

The anchor network device refers to a network device that serves the terminal when the terminal enters the RRC inactive state, and the source relay device refers to a network device used by the terminal to access the anchor network device. relay equipment.
The method according to claim 1, wherein a precondition for the anchor network device to send the indication information to the source relay device is any one of the following:

The terminal initiates RRC connection recovery using a direct connection under the anchor network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

The terminal initiates RRC connection recovery using direct connection under the target network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the target network device, and the target relay device is different from the source relay device;

The target network device is a network device that serves the terminal when the terminal initiates RRC connection recovery, and the target relay device refers to a relay device that serves the terminal when the terminal initiates RRC connection recovery ;

The direct connection refers to an RRC connection established between the terminal and the network device through a Uu interface, and the non-direct connection refers to an RRC connection established between the terminal and the network device through a relay device.
The method according to claim 1, wherein the indication information is RRC signaling, medium access control MAC control element CE or physical layer signaling sent by the anchor network device to the source relay device carry.
The method according to claim 1, wherein the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface radio link control channel RLC channel between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor point network device;

the mapping relationship between the end-to-end bearer between the terminal and the anchor network device and the direct communication interface RLC channel between the terminal and the source relay device;

Identification information of the terminal.
The method according to claim 4, wherein the identification information of the terminal includes any one or more of the following:

the cell radio network temporary identifier C-RNTI allocated by the anchor point network device to the terminal;

The combination of the source address and the destination address of the direct communication interface between the terminal and the source relay device;

The combination of source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device.
The method according to any one of claims 1-5, wherein the direct communication interface connection between the source relay device and the terminal comprises one or more of the following:

PC5-S connection between the source relay device and the terminal;

PC5-RRC connection between the source relay device and the terminal.
A method for terminal radio resource control RRC connection recovery, characterized in that the method includes:

The anchor network device of the terminal sends indication information to the source relay device of the terminal, where the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the source relay a direct communication interface connection between the device and the terminal;

The anchor network device refers to a network device that serves the terminal when the terminal enters the RRC inactive state, and the source relay device refers to a network device used when the terminal accesses the anchor network device. relay equipment.
The method according to claim 7, wherein the precondition for the anchor network device to send the indication information to the source relay device is any one of the following:

The terminal initiates RRC connection recovery using a direct connection under the anchor network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

The terminal initiates RRC connection recovery using direct connection under the target network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the target network device, and the target relay device is different from the source relay device;

The target network device is a network device that serves the terminal when the terminal initiates RRC connection recovery, and the target relay device refers to a relay device that serves the terminal when the terminal initiates RRC connection recovery ;

The direct connection refers to an RRC connection established between the terminal and the network device through a Uu interface, and the non-direct connection refers to an RRC connection established between the terminal and the network device through a relay device.
The method according to claim 7, wherein the indication information is RRC signaling, medium access control MAC control element CE or physical layer signaling sent by the anchor network device to the source relay device carry.
The method according to claim 7, wherein the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface radio link control channel RLC channel between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor point network device;

the mapping relationship between the end-to-end bearer between the terminal and the anchor network device and the direct communication interface RLC channel between the terminal and the source relay device;

Identification information of the terminal.
The method according to claim 10, wherein the identification information of the terminal includes any one or more of the following:

the cell radio network temporary identifier C-RNTI allocated by the anchor point network device to the terminal;

The combination of the source address and the destination address of the direct communication interface between the terminal and the source relay device;

The combination of source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device.
The method according to claim 7, wherein the direct communication interface connection between the source relay device and the terminal comprises one or more of the following:

PC5-S connection between the source relay device and the terminal;

PC5-RRC connection between the source relay device and the terminal.
The method according to any one of claims 7-12, wherein before the anchor network device sends the indication information to the source relay device of the terminal, the method further comprises:

receiving, by the anchor network device, a terminal context request message sent by the target network device of the terminal;

The target network device refers to a network device that serves the terminal when the terminal initiates RRC connection recovery.
The method of claim 13, wherein the method further comprises:

The anchor network device deletes the configuration information related to the source relay device of the terminal under the anchor network device from the locally stored terminal context/context information according to the terminal context request message;

The anchor network device sends the deleted terminal context/context information to the target network device through an interface between network devices.
The method of claim 13, wherein the method further comprises:

The anchor network device sends the locally stored terminal context/context information to the target network device through the interface between network devices according to the terminal context request message.
The method according to any one of claims 7-12, wherein before the anchor network device sends the indication information to the source relay device of the terminal, the method further comprises:

The anchor point network device receives the RRC connection restoration request message sent by the terminal.
The method according to claim 16, wherein after the anchor point network device receives the RRC connection recovery request message from the terminal, the method further comprises:

The anchor network device deletes the configuration information related to the source relay device of the terminal under the anchor network device from the locally stored terminal context/context information;

The anchor network device sends a response message corresponding to the RRC connection restoration request message to the terminal according to the deleted terminal context/context information.
An apparatus for terminal radio resource control RRC connection recovery, characterized in that it includes a memory, a transceiver and a processor;

the memory for storing computer programs;

the transceiver, configured to send and receive data under the control of the processor;

The processor is configured to read the computer program in the memory and perform the following operations:

Receive indication information from the anchor point network device of the terminal, wherein the indication information is used to instruct the source relay device of the terminal to release configuration information related to the terminal and/or the source relay device and the terminal Direct communication interface connections between terminals;

Release the configuration information related to the terminal and/or the direct communication interface connection between the source relay device and the terminal according to the indication information;

The anchor network device refers to a network device that serves the terminal when the terminal enters the RRC inactive state, and the source relay device refers to a network device used when the terminal accesses the anchor network device. relay equipment.
The apparatus according to claim 18, wherein a precondition for the anchor network device to send the indication information to the source relay device is any one of the following:

The terminal initiates RRC connection recovery using a direct connection under the anchor network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

The terminal initiates RRC connection recovery using direct connection under the target network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the target network device, and the target relay device is different from the source relay device;

The target network device is a network device that serves the terminal when the terminal initiates RRC connection recovery, and the target relay device refers to a relay device that serves the terminal when the terminal initiates RRC connection recovery ;

The direct connection refers to an RRC connection established between the terminal and the network device through a Uu interface, and the non-direct connection refers to an RRC connection established between the terminal and the network device through a relay device.
The apparatus according to claim 18, wherein the indication information is RRC signaling, medium access control (MAC control element CE) or physical layer signaling sent by the anchor network device to the source relay device carry.
The apparatus according to claim 18, wherein the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface radio link control channel RLC channel between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor point network device;

the mapping relationship between the end-to-end bearer between the terminal and the anchor network device and the direct communication interface RLC channel between the terminal and the source relay device;

Identification information of the terminal.
The apparatus according to claim 21, wherein the identification information of the terminal includes any one or more of the following:

the cell radio network temporary identifier C-RNTI allocated by the anchor point network device to the terminal;

The combination of the source address and the destination address of the direct communication interface between the terminal and the source relay device;

The combination of source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device.
The apparatus according to any one of claims 18-22, wherein the direct communication interface connection between the source relay device and the terminal includes one or more of the following:

PC5-S connection between the source relay device and the terminal;

PC5-RRC connection between the source relay device and the terminal.
An apparatus for terminal radio resource control RRC connection recovery, characterized in that it is applied to an anchor point network device of a terminal, and the apparatus includes a memory, a transceiver and a processor;

the memory for storing computer programs;

the transceiver, configured to send and receive data under the control of the processor;

The processor is configured to read the computer program in the memory and perform the following operations:

Send indication information to the source relay device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the relationship between the source relay device and the terminal. direct communication interface connection between

The anchor network device refers to a network device that serves the terminal when the terminal enters the RRC inactive state, and the source relay device refers to a network device used when the terminal accesses the anchor network device. relay equipment.
The apparatus according to claim 24, wherein a precondition for the anchor network device to send the indication information to the source relay device is any one of the following:

The terminal initiates RRC connection recovery using a direct connection under the anchor network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

The terminal initiates RRC connection recovery using direct connection under the target network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the target network device, and the target relay device is different from the source relay device;

The target network device is a network device that serves the terminal when the terminal initiates RRC connection recovery, and the target relay device refers to a relay device that serves the terminal when the terminal initiates RRC connection recovery ;

The direct connection refers to an RRC connection established between the terminal and the network device through a Uu interface, and the non-direct connection refers to an RRC connection established between the terminal and the network device through a relay device.
The apparatus according to claim 24, wherein the indication information is RRC signaling, medium access control MAC control element CE or physical layer signaling sent by the anchor network device to the source relay device carry.
The apparatus according to claim 24, wherein the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface radio link control channel RLC channel between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor point network device;

the mapping relationship between the end-to-end bearer between the terminal and the anchor network device and the direct communication interface RLC channel between the terminal and the source relay device;

Identification information of the terminal.
The apparatus according to claim 27, wherein the identification information of the terminal includes any one or more of the following:

the cell radio network temporary identifier C-RNTI allocated by the anchor point network device to the terminal;

The combination of the source address and the destination address of the direct communication interface between the terminal and the source relay device;

The combination of source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device.
The apparatus according to claim 24, wherein the direct communication interface connection between the source relay device and the terminal comprises one or more of the following:

PC5-S connection between the source relay device and the terminal;

PC5-RRC connection between the source relay device and the terminal.
The apparatus according to any one of claims 24-29, wherein the processor is further configured to perform the following operations:

Before sending the indication information to the source relay device of the terminal, receive a terminal context request message sent by the target network device of the terminal;

The target network device refers to a network device that serves the terminal when the terminal initiates RRC connection recovery.
The apparatus according to claim 30, wherein the processor is further configured to perform the following operations:

According to the terminal context request message, delete the configuration information related to the source relay device of the terminal under the anchor network device from the locally stored terminal context/context information;

The deleted terminal context/context information is sent to the target network device through an interface between network devices.
The apparatus according to claim 30, wherein the processor is further configured to perform the following operations:

According to the terminal context request message, the locally stored terminal context/context information is sent to the target network device through the interface between network devices.
The apparatus according to any one of claims 24-29, wherein the processor is further configured to perform the following operations:

Before sending the indication information to the source relay device of the terminal, the RRC connection restoration request message sent by the terminal is received.
The apparatus according to claim 33, wherein the processor is further configured to perform the following operations:

After receiving the RRC connection recovery request message from the terminal, delete the configuration information related to the source relay device under the anchor network device of the terminal in the locally stored terminal context/context information;

According to the deleted terminal context/context information, a response message corresponding to the RRC connection restoration request message is sent to the terminal.
An apparatus for terminal radio resource control RRC connection recovery, characterized in that it includes:

A receiving unit, configured to receive indication information from the anchor point network device of the terminal, wherein the indication information is used to instruct the source relay device of the terminal to release the terminal-related configuration information and/or the source relay device following the direct communication interface connection between the device and the terminal;

a processing unit, configured to release the terminal-related configuration information and/or the direct communication interface connection between the source relay device and the terminal according to the indication information;

The anchor network device refers to a network device that serves the terminal when the terminal enters the RRC inactive state, and the source relay device refers to a network device used when the terminal accesses the anchor network device. relay equipment.
The apparatus according to claim 35, wherein a precondition for the anchor network device to send the indication information to the source relay device is any one of the following:

The terminal initiates RRC connection recovery using a direct connection under the anchor network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

The terminal initiates RRC connection recovery using direct connection under the target network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the target network device, and the target relay device is different from the source relay device;

The target network device is a network device that serves the terminal when the terminal initiates RRC connection recovery, and the target relay device refers to a relay device that serves the terminal when the terminal initiates RRC connection recovery ;

The direct connection refers to an RRC connection established between the terminal and the network device through a Uu interface, and the non-direct connection refers to an RRC connection established between the terminal and the network device through a relay device.
The apparatus according to claim 35, wherein the indication information is sent by the anchor network device to the source relay device through RRC signaling, medium access control (MAC control element CE, or physical layer signaling) carry.
The apparatus according to claim 35, wherein the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface radio link control channel RLC channel between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor point network device;

the mapping relationship between the end-to-end bearer between the terminal and the anchor network device and the direct communication interface RLC channel between the terminal and the source relay device;

Identification information of the terminal.
The device according to claim 38, wherein the identification information of the terminal includes any one or more of the following:

the cell radio network temporary identifier C-RNTI allocated by the anchor point network device to the terminal;

The combination of the source address and the destination address of the direct communication interface between the terminal and the source relay device;

The combination of source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device.
The apparatus according to any one of claims 35-39, wherein the direct communication interface connection between the source relay device and the terminal includes one or more of the following:

PC5-S connection between the source relay device and the terminal;

PC5-RRC connection between the source relay device and the terminal.
An apparatus for terminal radio resource control RRC connection recovery, characterized in that it is applied to an anchor point network device of a terminal, and the apparatus includes:

A sending unit, configured to send indication information to the source relay device of the terminal, wherein the indication information is used to instruct the source relay device to release the configuration information related to the terminal and/or the source relay device with a direct communication interface connection between the terminal;

The anchor network device refers to a network device that serves the terminal when the terminal enters the RRC inactive state, and the source relay device refers to a network device used when the terminal accesses the anchor network device. relay equipment.
The apparatus according to claim 41, wherein a precondition for the anchor network device to send the indication information to the source relay device is any one of the following:

The terminal initiates RRC connection recovery using a direct connection under the anchor network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the anchor network device, and the target relay device is different from the source relay device;

The terminal initiates RRC connection recovery using direct connection under the target network device;

The terminal uses an indirect connection to initiate RRC connection recovery under the target network device, and the target relay device is different from the source relay device;

The target network device is a network device that serves the terminal when the terminal initiates RRC connection recovery, and the target relay device refers to a relay device that serves the terminal when the terminal initiates RRC connection recovery ;

The direct connection refers to an RRC connection established between the terminal and the network device through a Uu interface, and the non-direct connection refers to an RRC connection established between the terminal and the network device through a relay device.
The apparatus according to claim 41, wherein the indication information is sent by the anchor network device to the source relay device through RRC signaling, medium access control (MAC control element CE, or physical layer signaling) carry.
The apparatus according to claim 41, wherein the terminal-related configuration information includes one or more of the following:

The mapping relationship between the direct communication interface radio link control channel RLC channel between the terminal and the source relay device and the Uu interface RLC channel between the source relay device and the anchor point network device;

the mapping relationship between the end-to-end bearer between the terminal and the anchor network device and the direct communication interface RLC channel between the terminal and the source relay device;

Identification information of the terminal.
The apparatus according to claim 44, wherein the identification information of the terminal includes any one or more of the following:

the cell radio network temporary identifier C-RNTI allocated by the anchor point network device to the terminal;

The combination of the source address and the destination address of the direct communication interface between the terminal and the source relay device;

The combination of source address, destination address, and transmission type of the direct communication interface between the terminal and the source relay device.
The apparatus according to claim 41, wherein the direct communication interface connection between the source relay device and the terminal comprises one or more of the following:

PC5-S connection between the source relay device and the terminal;

PC5-RRC connection between the source relay device and the terminal.
A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute any one of claims 1 to 6 or claim 7 The method of any one of to 17.
A computer program product, comprising a computer program, characterized in that, when the computer program is executed by a processor, the method according to any one of claims 1 to 6 or any one of claims 7 to 17 is implemented.