Method for transmitting remote terminal information, method for receiving and device

Abstract

A method, a receiving method and a device for transmitting remote terminal information, the method comprising: a first relay terminal transmitting information of a remote terminal to a base station, the remote terminal accessing the base station through the first relay terminal, the information of the remote terminal comprising a Uu interface identifier and / or a PC5 interface identifier of the remote terminal. Embodiments of the present application inform the base station of the information of the remote terminal connected by the relay terminal, and assist the base station in allocating a local relay identifier to the remote terminal based on the information, so as to avoid problems that the relay terminal does not have the local relay identifier of the remote terminal and does not establish the Uu SRB layer entity corresponding to the remote terminal when transmitting initial signaling of the remote terminal. In addition, the information can also be used by the base station to determine a paging transmission mode of the remote terminal, so as to avoid data transmission and reception problems caused by the relay terminal listening to the paging opportunity of the remote terminal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile communication, in particular to a sending method and a receiving method of remote terminal information and devices. BACKGROUND

[0002] As shown in the prior art, a traditional wireless communication adopts a cellular network communication mode, that is, a terminal and a network side device perform uplink / downlink data / control information transmission through a user to network interface universal (Uu) interface. The Uu interface is also referred to as a user network interface or an air interface. Figure 1

[0003] As shown in the prior art, direct communication refers to a mode in which adjacent terminals can perform data transmission in a close range through a direct communication link (also referred to as a sidelink or PC5). A wireless interface corresponding to the sidelink link is referred to as a direct communication interface (also referred to as a sidelink interface or PC5 interface). Figure 2

[0004] In order to expand network coverage, a terminal-to-network relay mode (UE-to-Network Relay) is considered to be introduced. In the above-mentioned relay mode, a relay node can be a terminal with a relay function. As shown in the prior art, for the UE-to-Network Relay, an interface between the relay and the network uses the Uu interface, and an interface between the relayed UE (referred to as a remote UE in the patent) and the network uses the PC5 interface. A link between the relayed UE and the network can be referred to as a backhaul link for the remote UE. Figure 3

[0005] In the scenario shown in the prior art, a remote terminal can need a relay terminal to assist in receiving a network paging for the remote terminal, which can affect data transmission of the relay terminal in an RRC connected state. In addition, the relay terminal does not carry a local relay identifier assigned by a base station and capable of identifying the remote terminal when transmitting initial Uu signaling of the remote terminal. Figure 3 SUMMARY

[0006] At least one embodiment of the present application provides a sending method and a receiving method of remote terminal information, which can notify a base station of information of a remote terminal connected to a relay terminal, and can assist the base station in assigning a local relay identifier to the remote terminal or determining a paging mode of the remote terminal based on the information.

[0007] According to an aspect of the present application, at least one embodiment provides a sending method and a receiving method of remote terminal information, comprising:

[0008] ​​​​The first relay terminal sends information about the remote terminal to the base station. The remote terminal accesses the base station through the first relay terminal. The information about the remote terminal includes the user-to-network Uu interface identifier and / or the direct communication PC5 interface identifier of the remote terminal.

[0009] Furthermore, according to at least one embodiment of the present invention, the information of the remote terminal also includes at least one of the following:

[0010] The remote terminal's wireless connection control RRC status;

[0011] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0012] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0013] The connection status of the direct communication link of the remote terminal.

[0014] Furthermore, according to at least one embodiment of the present invention, before sending the information of the remote terminal to the base station, the method further includes:

[0015] The first relay terminal receives information from the remote terminal through a direct communication link with the remote terminal.

[0016] Furthermore, according to at least one embodiment of the present invention, the information of the remote terminal is sent by the remote terminal after a direct communication link is established with the first relay terminal.

[0017] Furthermore, according to at least one embodiment of the present invention, when the first relay terminal meets a preset condition, it sends the information of the remote terminal to the base station, wherein the preset condition includes at least one of the following:

[0018] First preset condition: The remote terminal is in RRC idle state or inactive state, the first relay terminal is in RRC connected state, and the first relay terminal is not configured with common control resource set CORESET and / or common search space;

[0019] Second preset condition: The first relay terminal receives the first Uu RRC message sent by the remote terminal from the direct communication link;

[0020] Third preset condition: The first relay terminal detects that the wireless link between it and the remote terminal is interrupted.

[0021] Furthermore, according to at least one embodiment of the present invention, when the second preset condition is met, the first relay terminal buffers the first Uu RRC message, and after sending the information of the remote terminal to the base station, the method further includes:

[0022] The first relay terminal receives and saves the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier sent by the base station. The local relay identifier is the identification information allocated by the base station to identify the remote terminal on the Uu interface of the first relay terminal and the base station.

[0023] And / or,

[0024] The first relay terminal receives the Uu interface configuration information of the remote terminal sent by the base station, and performs Uu interface configuration according to the Uu interface configuration information of the remote terminal, wherein the Uu interface configuration information includes SRB and / or DRB configuration information.

[0025] Furthermore, according to at least one embodiment of the present invention, the configuration of the execution Uu interface includes:

[0026] Configure the entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, RLC layer and MAC layer.

[0027] Furthermore, according to at least one embodiment of the present invention, it further includes:

[0028] The first relay terminal adds the local relay identifier corresponding to the remote terminal to the adaptation layer header of the first Uu RRC message and then sends it to the base station.

[0029] Furthermore, according to at least one embodiment of the present invention, it further includes:

[0030] The first relay terminal receives the first Uu RRC message sent by the base station, determines the first remote terminal corresponding to the first local relay identifier based on the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier stored locally and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, and sends the first Uu RRC message to the first remote terminal.

[0031] Furthermore, according to at least one embodiment of the present invention, it further includes:

[0032] When the first relay terminal detects a wireless link interruption with the remote terminal, it sends an indication message to the base station indicating that the wireless link between the remote terminal and the first relay terminal has been interrupted.

[0033] According to another aspect of the present invention, at least one embodiment provides a method for receiving remote terminal information, comprising:

[0034] The base station receives information about a remote terminal sent by a first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the Uu interface identifier and the PC5 interface identifier of the remote terminal.

[0035] The base station performs at least one of the following processes based on the information from the remote terminal:

[0036] Assign a local relay identifier for identifying the remote terminal on the Uu interface of the first relay terminal and the base station, determine a first correspondence between the Uu interface identifier, PC5 interface identifier and local relay identifier of the remote terminal, and send a second correspondence between the PC5 interface identifier and local relay identifier of the remote terminal to the first relay terminal.

[0037] Configure the entity corresponding to the Uu interface of the remote terminal, and send the Uu interface configuration information of the remote terminal to the first relay terminal. The Uu interface configuration information includes the configuration information of SRB and / or DRB.

[0038] Determine the paging transmission method of the remote terminal.

[0039] Furthermore, according to at least one embodiment of the present invention, the information of the remote terminal also includes at least one of the following:

[0040] The remote terminal's wireless connection control RRC status;

[0041] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0042] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0043] The connection status of the direct communication link of the remote terminal.

[0044] Furthermore, according to at least one embodiment of the present invention, it further includes:

[0045] The base station receives the second Uu RRC message from the remote terminal sent by the first relay terminal, determines the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier based on the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first correspondence stored locally, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal.

[0046] And / or,

[0047] When the base station sends the third Uu RRC message of the third remote terminal to the first relay terminal, it determines the local relay identifier corresponding to the third remote terminal according to the first correspondence stored locally, adds it to the adaptation layer header of the third UuRRC message, and then sends it to the first relay terminal.

[0048] Furthermore, according to at least one embodiment of the present invention, the paging transmission method includes one or more of the following:

[0049] First transmission method: The base station transmits the paging message of the remote terminal through the paging channel when the remote terminal is paging.

[0050] The second transmission method: The base station sends the paging message of the remote terminal to the relay terminal through dedicated signaling, and the relay terminal forwards it to the remote terminal.

[0051] Furthermore, according to at least one embodiment of the present invention, determining the paging transmission method of the remote terminal includes at least one of the following:

[0052] If the information from the remote terminal indicates that the direct communication link of the remote terminal has been interrupted and no information from the remote terminal other than the first relay terminal has been received from the other relay terminal, then the paging transmission method of the remote terminal is determined to be the first transmission method.

[0053] If no public CORESET and / or public search space are configured on the active BWP of the first relay terminal, the paging transmission method of the remote terminal is determined to be the second transmission method or both the first transmission method and the second transmission method are used simultaneously.

[0054] When a public CORESET and / or public search space are configured on the activated BWP of the first relay terminal, the paging transmission mode of the remote terminal is determined to be the first transmission mode.

[0055] Furthermore, according to at least one embodiment of the present invention, it further includes:

[0056] The base station receives an indication message sent by the first relay terminal, indicating that the wireless link between the fourth remote terminal and the first relay terminal has been interrupted.

[0057] According to the instruction information, the base station releases the relevant configuration of the fourth remote terminal, deletes the local relay identifier allocated to the fourth remote terminal, deletes the second correspondence between the Uu interface identifier of the fourth remote terminal and the local relay identifier, and determines the paging transmission method of the fourth remote terminal based on the information of the fourth remote terminal reported by each relay terminal.

[0058] According to another aspect of the present invention, at least one embodiment provides a means for transmitting remote terminal information, applied to a first relay terminal, comprising a memory, a transceiver, and a processor, wherein...

[0059] The memory is used to store computer programs;

[0060] The transceiver is used to send and receive data under the control of the processor;

[0061] The processor is configured to read the computer program in the memory and perform the following operations:

[0062] Send information about a remote terminal to the base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the user-to-network Uu interface identifier and the direct communication PC5 interface identifier of the remote terminal.

[0063] Furthermore, according to at least one embodiment of the present invention, the information of the remote terminal also includes at least one of the following:

[0064] The remote terminal's wireless connection control RRC status;

[0065] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0066] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0067] The connection status of the direct communication link of the remote terminal.

[0068] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0069] Before sending the information of the remote terminal to the base station, the information of the remote terminal is received through a direct communication link with the remote terminal.

[0070] Furthermore, according to at least one embodiment of the present invention, the information of the remote terminal is sent by the remote terminal after a direct communication link is established with the first relay terminal.

[0071] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0072] When preset conditions are met, the information of the remote terminal is sent to the base station, wherein the preset conditions include at least one of the following:

[0073] First preset condition: The remote terminal is in RRC idle state or inactive state, the first relay terminal is in RRC connected state, and the first relay terminal is not configured with common control resource set CORESET and / or common search space;

[0074] Second preset condition: The first relay terminal receives the first Uu RRC message sent by the remote terminal from the direct communication link;

[0075] Third preset condition: The first relay terminal detects that the wireless link between it and the remote terminal is interrupted.

[0076] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0077] If the second preset condition is met, the first Uu RRC message is cached, and after sending the information of the remote terminal to the base station:

[0078] Receive and save the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier sent by the base station. The local relay identifier is the identification information allocated by the base station to identify the remote terminal on the Uu interface of the first relay terminal and the base station.

[0079] And / or,

[0080] The system receives the Uu interface configuration information of the remote terminal sent by the base station, and performs Uu interface configuration according to the Uu interface configuration information of the remote terminal, wherein the Uu interface configuration information includes SRB and / or DRB configuration information.

[0081] Furthermore, according to at least one embodiment of the present invention, the configuration of the execution Uu interface includes:

[0082] Configure the entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, RLC layer and MAC layer.

[0083] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0084] After adding the local relay identifier corresponding to the remote terminal to the adaptation layer header of the first Uu RRC message, it is sent to the base station.

[0085] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0086] The system receives a first Uu RRC message sent by the base station to the remote terminal. Based on the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier stored locally and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, the system determines the first remote terminal corresponding to the first local relay identifier and sends the first Uu RRC message to the first remote terminal.

[0087] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0088] If a wireless link interruption is detected with the remote terminal, an indication message is sent to the base station to indicate that the wireless link between the remote terminal and the first relay terminal has been interrupted.

[0089] According to another aspect of the present invention, at least one embodiment provides a first relay terminal, comprising:

[0090] The transmitting unit is used to transmit information of a remote terminal to the base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes the user-to-network Uu interface identifier and / or the direct communication PC5 interface identifier of the remote terminal.

[0091] According to another aspect of the present invention, at least one embodiment provides a receiving device for remote terminal information, applied to a base station, comprising a memory, a transceiver, and a processor, wherein...

[0092] The memory is used to store computer programs;

[0093] The transceiver is used to send and receive data under the control of the processor;

[0094] The processor is configured to read the computer program in the memory and perform the following operations:

[0095] The system receives information about a remote terminal sent by a first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the Uu interface identifier and the PC5 interface identifier of the remote terminal.

[0096] Based on the information from the remote terminal, perform at least one of the following processes:

[0097] Assign a local relay identifier for identifying the remote terminal on the Uu interface of the first relay terminal and the base station, determine a first correspondence between the Uu interface identifier, PC5 interface identifier and local relay identifier of the remote terminal, and send a second correspondence between the PC5 interface identifier and local relay identifier of the remote terminal to the first relay terminal.

[0098] Configure the entity corresponding to the Uu interface of the remote terminal, and send the Uu interface configuration information of the remote terminal to the first relay terminal. The Uu interface configuration information includes the configuration information of SRB and / or DRB.

[0099] Determine the paging transmission method of the remote terminal.

[0100] Furthermore, according to at least one embodiment of the present invention, the information of the remote terminal also includes at least one of the following:

[0101] The remote terminal's wireless connection control RRC status;

[0102] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0103] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0104] The connection status of the direct communication link of the remote terminal.

[0105] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0106] The system receives the second Uu RRC message from the remote terminal sent by the first relay terminal, determines the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier based on the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first correspondence stored locally, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal.

[0107] And / or,

[0108] When sending the third Uu RRC message of the third remote terminal to the first relay terminal, the local relay identifier corresponding to the third remote terminal is determined according to the first correspondence stored locally and added to the adaptation layer header of the third Uu RRC message before being sent to the first relay terminal.

[0109] Furthermore, according to at least one embodiment of the present invention, the paging transmission method includes one or more of the following:

[0110] First transmission method: The base station transmits the paging message of the remote terminal through the paging channel when the remote terminal is paging.

[0111] Second transmission method: The base station sends the paging message of the remote terminal to the relay terminal through dedicated signaling, and the relay terminal forwards it to the remote terminal;

[0112] Third transmission method: Simultaneously employing the first transmission method and the second transmission method.

[0113] Furthermore, according to at least one embodiment of the present invention, determining the paging transmission method of the remote terminal includes at least one of the following:

[0114] If the information from the remote terminal indicates that the direct communication link of the remote terminal has been interrupted and no information from the remote terminal other than the first relay terminal has been received from the other relay terminal, then the paging transmission method of the remote terminal is determined to be the first transmission method.

[0115] If no public CORESET and / or public search space are configured on the active BWP of the first relay terminal, the paging transmission mode of the remote terminal is determined to be the second transmission mode or the third transmission mode.

[0116] When a public CORESET and / or public search space are configured on the activated BWP of the first relay terminal, the paging transmission mode of the remote terminal is determined to be the first transmission mode.

[0117] Furthermore, according to at least one embodiment of the present invention, the processor is also configured to read a computer program from the memory and perform the following operations:

[0118] Receive indication information sent by the first relay terminal to indicate that the wireless link between the fourth remote terminal and the first relay terminal has been interrupted;

[0119] According to the instruction information, release the relevant configuration of the fourth remote terminal, delete the local relay identifier allocated to the fourth remote terminal, and delete the second correspondence between the Uu interface identifier of the fourth remote terminal and the local relay identifier. Based on the information of the fourth remote terminal reported by each relay terminal, determine the paging transmission method of the fourth remote terminal.

[0120] According to another aspect of the present invention, at least one embodiment provides a base station, comprising:

[0121] A receiving unit is configured to receive information from a remote terminal sent by a first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes the Uu interface identifier and the PC5 interface identifier of the remote terminal.

[0122] The processing unit is configured to perform at least one of the following processes based on the information from the remote terminal:

[0123] Assign a local relay identifier for identifying the remote terminal on the Uu interface of the first relay terminal and the base station, determine a first correspondence between the Uu interface identifier, PC5 interface identifier and local relay identifier of the remote terminal, and send a second correspondence between the PC5 interface identifier and local relay identifier of the remote terminal to the first relay terminal.

[0124] Configure the entity corresponding to the Uu interface of the remote terminal, and send the Uu interface configuration information of the remote terminal to the first relay terminal. The Uu interface configuration information includes the configuration information of SRB and / or DRB.

[0125] Determine the paging transmission method of the remote terminal.

[0126] According to another aspect of the present invention, at least one embodiment provides a processor-readable storage medium storing a computer program for causing the processor to perform the method described above.

[0127] Compared with existing technologies, the remote terminal information transmission method, reception method, and device provided in this invention notify the base station of the information of the remote terminal connected to the relay terminal. This assists the base station in allocating a local relay identifier for the remote terminal based on the aforementioned information, thereby avoiding the problems of the relay terminal lacking the local relay identifier of the remote terminal and failing to establish the corresponding Uu SRB layer entities when transmitting the initial signaling of the remote terminal. Furthermore, the aforementioned information can also be used by the base station to determine the paging mode of the remote terminal, thus avoiding data transmission and reception problems caused by the relay terminal monitoring the paging opportunity (PO) of the remote terminal. Attached Figure Description

[0128] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0129] Figure 1 This is a schematic diagram illustrating the communication method for centralized network control in an existing LTE system.

[0130] Figure 2 This is a schematic diagram of existing D2D discovery / communication technology;

[0131] Figure 3 This is a schematic diagram of a terminal-to-network relay in existing technology.

[0132] Figure 4 This is a flowchart illustrating a method for sending remote terminal information according to an embodiment of the present invention.

[0133] Figure 5 This is another flowchart illustrating the remote terminal information receiving method according to an embodiment of the present invention;

[0134] Figure 6 This is an example flowchart of the interaction between a base station and a relay terminal provided in an embodiment of the present invention;

[0135] Figure 7 This is an example 2 of the interaction flowchart between the base station and the relay terminal provided in an embodiment of the present invention;

[0136] Figure 8 This is an example 3 of the interaction flowchart between the base station and the relay terminal provided in an embodiment of the present invention;

[0137] Figure 9 This is an example 4 of the interaction flowchart between the base station and the relay terminal provided in an embodiment of the present invention;

[0138] Figure 10 This is an example 5 of the interaction flowchart between the base station and the relay terminal provided in an embodiment of the present invention;

[0139] Figure 11 A schematic diagram of a terminal provided in an embodiment of the present invention;

[0140] Figure 12 A schematic diagram of a remote terminal information sending device provided in an embodiment of the present invention;

[0141] Figure 13 This is a schematic diagram of a base station structure provided in an embodiment of the present invention;

[0142] Figure 14 This is a schematic diagram of a remote terminal information receiving device provided in an embodiment of the present invention. Detailed Implementation

[0143] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0144] The terms “first,” “second,” etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The terms “and / or” in the specification and claims indicate at least one of the connected objects.

[0145] The following description provides examples and is not intended to limit the scope, applicability, or configuration set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the spirit and scope of this disclosure. Various procedures or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0146] In this document, the network-side equipment referred to can specifically be a base station. The base station can be a 5G or later version base station, such as a gNB, 5G NR NB, etc., or it can also be a base station in other communication systems, such as an eNB, a Wireless Local Area Network (WLAN) access point, or other access points. Furthermore, a base station can also be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, or any other suitable term in the field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. Additionally, in the following text, "base station" also refers to network-side equipment.

[0147] As described in the background section, in order to extend network coverage, existing technologies have introduced methods such as... Figure 3 The diagram illustrates a UE-to-Network Relay scheme. The remote terminal can be in RRC IDLE, RRC INACTIVE, or RRC CONNECTED state, and the relay terminal can also be in RRC IDLE, RRC INACTIVE, or RRC CONNECTED state. However, when the remote terminal is in RRC CONNECTED state, the relay terminal must also be in RRC CONNECTED state. For remote terminals in RRC IDLE or RRC INACTIVE state, the relay terminal is required to assist in receiving network paging messages for the remote terminal. If the relay terminal is in RRC CONNECTED state at this time, and if its bandwidth part (BWP) does not have a common control resource set (CORESET) or common search space configured, BWP switching is required to switch to a BWP with a common CORESET and common search space to receive paging messages from the remote terminal. This may affect the relay terminal's data transmission and reception.

[0148] A relay terminal can simultaneously relay signaling and data for multiple remote terminals. On the Uu interface, the relay terminal needs to distinguish which remote terminal each packet originates from or is destined for. Therefore, a local U2N relay identifier needs to be assigned to each remote terminal for identification by both the relay terminal and the base station on the Uu interface. The local U2N relay identifier is assigned by the base station. However, if the base station assigns the local U2N relay identifier to a remote terminal only after receiving its first uplink Uu RRC message, the relay terminal cannot use the assigned identifier when sending the remote terminal's first Uu RRC message to the base station. Furthermore, if the relay terminal has not established Uu entities at each layer (including but not limited to the adaptation layer, Radio Link Control (RLC) layer, and Media Access Control (MAC) layer) for the remote terminal when sending its first Uu RRC message, it can only send the initial Uu signaling of the remote terminal using a fixed configuration through a common channel, making it difficult to guarantee transmission reliability and latency.

[0149] To address at least one of the above problems, embodiments of the present invention provide a method for sending and receiving remote terminal information. A relay terminal reports information about the remote UE it connects to to the network via dedicated signaling. Based on this information, the network assigns a local relay identifier (also referred to as a local U2N relay identifier in this document) to the remote terminal, configures the signaling radio bearer (SRB) and / or data radio bearer (DRB) of the remote terminal and notifies the relay terminal, or determines the paging transmission method of the remote terminal.

[0150] Please refer to Figure 4 The present invention provides a method for sending remote terminal information, which, when applied to a relay terminal side, includes:

[0151] Step 41: The first relay terminal sends information about the remote terminal to the base station. The remote terminal accesses the base station through the first relay terminal. The information about the remote terminal includes the Uu interface identifier and / or PC5 interface identifier of the remote terminal.

[0152] Here, the first relay terminal can send information about one or more remote terminals connected to it to the base station. The Uu interface identification information of the remote terminal can specifically be the remote terminal's 5G S-Temporary Mobile Subscription Identifier (5G-S-TMSI), Inactive RNTI (I-RNTI), or Cell RNTI (C-RNTI), etc. The PC5 interface identifier of the remote terminal can specifically be the remote terminal's Layer-2 ID. The remote terminal can be directly connected to the first relay terminal or connected to the first relay terminal through other relay terminals. The first relay terminal can be a relay terminal directly connected to the base station.

[0153] Through the above steps, the relay terminal in this embodiment of the invention reports the information of the remote terminal it connects to to the base station. In this way, the base station can allocate a local relay identifier to the remote terminal or determine the paging transmission method of the remote terminal based on the information. This can avoid the problems of the relay terminal not having the local relay identifier of the remote terminal and not establishing the corresponding Uu SRB layer entities when transmitting the initial signaling of the remote terminal. It can also avoid the data transmission and reception problems caused by the relay terminal listening to the PO of the remote terminal.

[0154] In this embodiment of the invention, the information of the remote terminal may further include at least one of the following:

[0155] 1) The RRC state of the remote terminal, such as RRC idle state, connected state, inactive state, etc.;

[0156] 2) The paging reception request information of the remote terminal, wherein the paging reception request information is used to indicate whether a relay terminal is required to perform paging forwarding;

[0157] 3) Whether the first relay terminal receives the Uu RRC message from the remote terminal. The Uu RRC message includes RRCSetupRequest, RRCResumeRequest, RRCReestablishmentRequest, or RRCReconfigurationComplete message, etc.

[0158] 4) The connection status of the direct communication link of the remote terminal, that is, whether there is a relay connection between the relay terminal and the remote terminal, such as normal connection or connection interruption.

[0159] Specifically, the information from the remote terminal can be sent by the remote terminal after establishing a direct communication link with the first relay terminal. For example, after establishing an SL unicast connection with the first relay terminal, the remote terminal sends its information to the relay terminal it is connected to via PC5-S signaling, PC5-RRC signaling, or SL MAC CE. Before step 41, the first relay terminal can receive the information from the remote terminal through the direct communication link with it, and then, in step 41, sends the information to the base station.

[0160] More specifically, the first remote terminal can decide whether to send the aforementioned information to the base station based on whether preset conditions are met. The preset conditions include at least one of the following:

[0161] First preset condition: The remote terminal is in RRC idle state or inactive state, the first relay terminal is in RRC connected state, and the first relay terminal is not configured with a public CORESET and / or public search space;

[0162] Second preset condition: The first relay terminal receives the first Uu RRC message sent by the remote terminal from the direct communication link, such as RRCSetupRequest, RRCResumeRequest, RRCReestablishmentRequest or RRCReconfigurationComplete message, etc.

[0163] The third preset condition: The first relay terminal detects that the wireless link between it and the remote terminal is interrupted, that is, the SL unicast connection between the remote terminal and the first relay terminal is broken.

[0164] Taking the second preset condition as an example, if the second preset condition is met, the first relay terminal can locally cache the first Uu RRC message sent by the remote terminal, and send the information of the remote terminal to the base station in step 41. The base station can then perform processing such as allocating a local relay identifier for the remote terminal based on the received information. Subsequently, the first relay terminal can also perform the following processing:

[0165] The first relay terminal receives and saves the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier sent by the base station. The local relay identifier is the identification information allocated by the base station to identify the remote terminal on the Uu interface of the first relay terminal and the base station.

[0166] And / or,

[0167] The first relay terminal receives the Uu interface configuration information of the remote terminal sent by the base station, and performs Uu interface configuration according to the Uu interface configuration information of the remote terminal, wherein the Uu interface configuration information includes SRB and / or DRB configuration information.

[0168] Here, the first relay terminal performs the configuration of the Uu interface, which may specifically include: configuring the entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, RLC layer and MAC layer.

[0169] Through the above steps, the first relay terminal can obtain the local relay identifier allocated by the base station to the remote terminal for identifying the terminal via the Uu interface between the first relay terminal and the base station. The first relay terminal can also determine the local relay identifier of the remote terminal based on the PC5 interface identifier of the remote terminal and the correspondence stored locally. Then, it adds the local relay identifier corresponding to the remote terminal to the adaptation layer header of the first Uu RRC message cached locally and sends it to the base station, thereby ensuring the reliability of Uu RRC message transmission.

[0170] After obtaining the correspondence between the PC5 interface identifier and the local relay identifier of the remote terminal, the first relay terminal can forward messages for the remote terminal based on this correspondence. For example, the first relay terminal receives a first Uu RRC message sent by the base station, determines the first remote terminal corresponding to the first local relay identifier based on the locally stored correspondence between the PC5 interface identifier and the local relay identifier of the remote terminal and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, and sends the first Uu RRC message to the first remote terminal. As another example, the first relay terminal receives a second UuRRC message sent by the first remote terminal from the direct communication link, determines the first local relay identifier corresponding to the first remote terminal based on the locally stored correspondence between the PC5 interface identifier and the local relay identifier of the remote terminal and the PC5 interface identifier of the first remote terminal, adds the first local relay identifier to the adaptation layer header of the second UuRRC message, and then sends it to the base station.

[0171] In this embodiment of the invention, the relay terminal can also send update information to the base station based on the connection status of the remote terminal. For example, if the first relay terminal detects a wireless link interruption with the remote terminal, it sends indication information to the base station indicating the wireless link interruption between the remote terminal and the first relay terminal. The base station can then delete the configuration related to the remote terminal based on this indication information.

[0172] Additionally, it should be noted that this invention is applicable to multi-hop relay scenarios, that is, scenarios where a remote terminal accesses the network through multiple relay terminals. In multi-hop relay scenarios, the information of the remote terminal reported by the relay terminal can include information about each relay terminal.

[0173] Please refer to Figure 5 The present invention provides a method for receiving remote terminal information, which, when applied to a base station, includes:

[0174] Step 51: The base station receives information about a remote terminal sent by the first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the Uu interface identifier and the PC5 interface identifier of the remote terminal.

[0175] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0176] Step 52, the base station performs at least one of the following processes based on the information from the remote terminal:

[0177] 1) Assign a local relay identifier for identifying the remote terminal on the Uu interface of the first relay terminal and the base station, determine the first correspondence between the Uu interface identifier, PC5 interface identifier and local relay identifier of the remote terminal, and send the second correspondence between the PC5 interface identifier and local relay identifier of the remote terminal to the first relay terminal.

[0178] 2) Configure the entity corresponding to the Uu interface of the remote terminal and send the Uu interface configuration information of the remote terminal to the first relay terminal. The Uu interface configuration information includes SRB and / or DRB configuration information. Here, configuring the entity corresponding to the Uu interface of the remote terminal includes configuring the entity corresponding to the Uu interface in at least one of SDAP, PDCP, adaptation layer, RLC and MAC layer.

[0179] 3) Determine the paging transmission method of the remote terminal.

[0180] The paging transmission method includes one or more of the following:

[0181] First transmission method: The base station transmits the paging message of the remote terminal through the paging channel when the remote terminal is paging.

[0182] The second transmission method: The base station sends the paging message of the remote terminal to the relay terminal through dedicated signaling, and the relay terminal forwards it to the remote terminal.

[0183] As can be seen, in this embodiment of the invention, the information of the remote terminal sent by the first relay terminal is used to enable the base station to perform at least one of the above-mentioned processes based on the information of the remote terminal.

[0184] The following are several examples of determining the paging transmission method of the remote terminal. It should be noted that the following examples are merely examples applicable to the present invention and are not intended to limit the present invention:

[0185] 1) If the information from the remote terminal indicates that the direct communication link of the remote terminal has been interrupted and no information from the remote terminal other than the first relay terminal has been received from the other relay terminal, the paging transmission method of the remote terminal is determined to be the first transmission method.

[0186] 2) If no public CORESET and / or public search space are configured on the active BWP of the first relay terminal, determine that the paging transmission mode of the remote terminal is the second transmission mode or both the first transmission mode and the second transmission mode are used simultaneously.

[0187] 3) If a public CORESET and / or public search space are configured on the active BWP of the first relay terminal, the paging transmission mode of the remote terminal is determined to be the first transmission mode.

[0188] Through the above steps, the base station can assign a local relay identifier to the remote terminal based on the information of the remote terminal sent by the relay terminal, configure the remote terminal's signaling radio bearer (SRB) and / or data radio bearer (DRB) and notify the relay terminal, or determine the paging transmission method of the remote terminal. This can avoid the problems of the relay terminal not having the remote terminal's local relay identifier and not establishing the corresponding Uu SRB layer entities when transmitting the initial signaling of the remote terminal, as well as avoid data transmission and reception problems caused by the relay terminal listening to the remote terminal's PO.

[0189] In this embodiment of the invention, the information of the remote terminal further includes at least one of the following:

[0190] The remote terminal's wireless connection control RRC status;

[0191] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0192] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0193] The connection status of the direct communication link of the remote terminal.

[0194] After allocating a local relay identifier for a remote terminal, the base station can transmit data based on the first mapping relationship maintained locally. For example, when the base station receives a second UuRRC message from the remote terminal sent by the first relay terminal, it determines the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier based on the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first mapping relationship stored locally, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal; and / or, when the base station sends a third Uu RRC message from a third remote terminal to the first relay terminal, it determines the local relay identifier corresponding to the third remote terminal based on the first mapping relationship stored locally, adds it to the adaptation layer header of the third Uu RRC message, and then sends it to the first relay terminal.

[0195] In this embodiment of the invention, the base station may also receive indication information sent by the first relay terminal, indicating a wireless link interruption between the fourth remote terminal and the first relay terminal. At this time, the base station, based on the indication information, releases the relevant configuration of the fourth remote terminal, deletes the local relay identifier allocated to the fourth remote terminal, and deletes the second correspondence between the Uu interface identifier of the fourth remote terminal and the local relay identifier. Based on the information of the fourth remote terminal reported by each relay terminal, the base station determines the paging transmission method of the fourth remote terminal.

[0196] As can be seen from the above, the embodiments of the present invention provide a relay terminal in a relay scenario that informs the base station of the information of the remote terminal it is connected to, so that the base station can allocate a local relay identifier (local U2N relay identifier) ​​for the remote terminal that wants to enter RRC CONNECTED, thereby avoiding the problem of the remote terminal's initial signaling lacking a local U2N relay identifier, and perform the remote terminal Uu SRB configuration on the relay terminal, thereby improving the signaling transmission reliability of the remote terminal. Alternatively, the base station can determine the paging method for the remote terminal, thereby avoiding data transmission and reception problems caused by the relay terminal listening to the remote terminal's PO.

[0197] The above-described methods of the embodiments of the present invention will be illustrated below through several specific interactive examples.

[0198] Example 1:

[0199] Remote UE1 accesses base station 1 through relay UE1. Remote UE1 initiates an RRC establishment request. The base station assigns a local relay identifier (i.e., local U2N relay identifier) ​​to remote UE1 and sends the Uu SRB configuration of remote UE1 to relay UE1. The RRC connection of remote UE1 is successfully established.

[0200] Relay UE1 in its initial RRC CONNECTED state is camped in cell 1 controlled by base station 1. For example... Figure 6 As shown, this example includes:

[0201] Step 61: The remote UE1 discovers and selects the relay UE1 as its U2N relay through the discovery process.

[0202] Step 62: The remote UE1 establishes a unicast connection of SL with the relay UE1.

[0203] Step 63: The remote UE1 sends its own Uu interface identification information (the remote UE's 5G-S-TMSI), the remote UE's PC5 interface identification information (the remote UE's Layer-2 ID), the remote UE's RRC status (RRC IDLE status), and paging reception request (the remote UE does not need the relay UE to perform paging forwarding) to the relay UE1.

[0204] Step 64: The remote UE1 sends an RRC establishment request message to the base station 1 via the relay UE1.

[0205] Step 65: After receiving the RRC establishment request message sent by the remote UE1 to the base station, the relay UE1 caches the message and triggers the relay UE1 to initiate a remote UE information report. The remote UE information report includes: the Uu interface identification information of the remote UE1 (the 5G-S-TMSI of the remote UE1); the PC5 interface identification information of the remote UE1 (the Layer-2 ID of the remote UE1); the RRC status of the remote UE1 (RRC IDLE status); paging reception requirement (the remote UE1 does not need the relay UE1 to perform paging forwarding); the receipt of the Uu RRC message from the remote UE1; and the relay connection status (a relay connection exists between the relay UE1 and the remote UE1).

[0206] Remote UE information reports can be sent via existing RRC messages or via the newly introduced RRC messages.

[0207] Step 66: After receiving the remote UE information report sent by relay UE1, base station 1 assigns a local U2N relay identifier 1 to remote UE1, and sends the assigned local U2N relay identifier 1, its correspondence with remote UE1, and the Uu SRB configuration of remote UE1 to relay UE1 via signaling. The Uu SRB of remote UE1 includes, but is not limited to, SRB0, SRB1, SRB2, and SRB3 and their combinations. The Uu SRB configuration of remote UE1 includes, but is not limited to, SDAP configuration, PDCP configuration, adaptation layer configuration, RLC configuration, MAC configuration, logical channel configuration, and physical layer configuration.

[0208] Step 67: After receiving the message from step 66, relay UE1 establishes various entities (including but not limited to adaptation layer, RLC, and MAC entities) for the remote UE based on the configuration information, and sends the cached RRC establishment request message of the remote UE1 to base station 1.

[0209] Step 68: Base station 1 sends an RRC establishment message to remote UE1 through relay UE1.

[0210] Step 69: Remote UE1 sends an RRC establishment complete message to base station 1 through relay UE1.

[0211] In steps 67-69 above, relay UE1 performs remote UE channel mapping through the local U2N relay identifier.

[0212] Example 1 also applies to scenarios where the remote UE is in RRC INACTIVE or RRC CONNECTED state. In this case, the Uu interface identifiers of the remote UE1 are I-RNTI and C-RNTI of the remote UE1, and the RRC messages initiated by the remote UE1 are RRCReestablishmentRequest and RRCReestablishmentRequest, respectively.

[0213] Example 2:

[0214] Remote UE1 accesses base station 1 through relay UE1. Relay UE1 is in connected state, and the active BWP of relay UE1 is not configured with a common coreset. Remote UE1 forwards paging requests through relay UE1. Figure 7 As shown, this example includes:

[0215] Steps 71-72 are the same as steps 61-62 in Example 1.

[0216] Step 73: The remote UE1 sends its own Uu interface identification information (the remote UE's 5G-S-TMSI), the remote UE's PC5 interface identification information (the remote UE's Layer-2 ID), the remote UE's RRC status (RRC IDLE), and the paging reception request (the remote UE needs the relay UE to perform paging forwarding) to the relay UE1.

[0217] Step 74: After receiving the information from the remote UE1, the relay UE1 triggers the relay UE1 to initiate a remote UE information report. The remote UE information report includes the remote UE1's Uu interface identifier information (the remote UE1's 5G-S-TMSI); the remote UE1's PC5 interface identifier information (the remote UE1's Layer-2 ID); the remote UE1's RRC status (RRC IDLE status); paging reception request (the remote UE1 needs the relay UE1 to perform paging forwarding); no Uu RRC message received from the remote UE1; and the relay connection status (a relay connection exists between the relay UE1 and the remote UE1).

[0218] Step 75: After receiving the remote UE information report from relay UE1, the base station knows that relay UE1 needs to forward paging for remote UE1, and that the active BWP of relay UE1 is not configured with a common CORESET. It then determines that the paging transmission method of remote UE1 is to send the paging to relay UE1 via dedicated signaling.

[0219] Step 76: Base station 1 uses dedicated signaling to send the paging message of remote UE1 to relay UE1.

[0220] Step 77: Relay UE1 forwards the paging request from remote UE1 via SL signaling.

[0221] Example 3:

[0222] Remote UE1 accesses base station 1 through relay UE1. Relay UE1 is in connected state. The active BWP of relay UE1 is not configured with a common coreset. Remote UE1 forwards paging through relay UE1. The SL link between relay UE1 and remote UE1 is interrupted. For example... Figure 8 As shown, this example includes:

[0223] Steps 81-85 are the same as steps 71-75 in Example 2.

[0224] Step 86: Relay UE1 detects that the SL connection with remote UE1 has been interrupted.

[0225] Step 87: Relay UE1 initiates a remote UE information report. The remote UE information report includes the Uu interface identifier information of remote UE1 (5G-S-TMSI of remote UE1); the PC5 interface identifier information of remote UE1 (Layer-2 ID of remote UE1); the RRC status of remote UE1 (RRC IDLE status); paging reception request (remote UE1 does not need relay UE1 to perform paging forwarding); no Uu RRC message received from remote UE1; and relay status (there is no relay connection between relay UE1 and remote UE1).

[0226] Step 88: After receiving the remote UE information report sent by relay UE1, the base station determines that the paging forwarding relationship between remote UE1 and relay UE1 no longer exists, and modifies the paging transmission method of remote UE1 to the traditional method of sending through the paging channel when remote UE1 is paging.

[0227] Examples 2 and 3 also apply to remote UEs in the RRC INACTIVE state, which contain the Uu interface identification information of remote UE1 (the I-RNTI of remote UE1).

[0228] Example 4:

[0229] Remote UE1 accesses base station 1 through 2-hop U2U relay UE1 and U2N relay UE2. Remote UE1 initiates an RRC establishment request. The base station assigns a local U2N relay identifier to remote UE1, and the RRC establishment of remote UE1 is successful.

[0230] In the initial RRC CONNECTED state, U2N relay UE2 is camped in cell 1 controlled by base station 1. For example... Figure 9 As shown, this example includes:

[0231] In steps 91 and 91a, the remote UE1 discovers and selects U2U relay UE1 and U2N relay UE2 as its U2N relay through the discovery process. Step 91a can be completed before step 91.

[0232] In steps 92 and 2a, the remote UE1 establishes a unicast connection (SL) with the U2U relay UE1, and the U2U relay UE1 establishes a unicast connection (SL) with the U2N relay UE2. Step 92a may occur before the unicast connection (SL) between the U2U relay UE1 and the U2N relay UE2 already exists.

[0233] In steps 93 and 3a, the remote UE1 sends its Uu interface identification information (the remote UE's 5G-S-TMSI), the remote UE's PC5 interface identification information (the remote UE's Layer-2 ID), the remote UE's RRC status (RRC IDLE status), and the paging reception request (the remote UE needs the relay UE to perform paging forwarding) to the U2U relay UE1, which then sends them to the U2N relay UE2.

[0234] Step 94: Remote UE1 initiates an RRC establishment request to base station 1 via U2U relay UE1 and U2N relay UE2.

[0235] Step 95: After receiving the RRC establishment request sent by the remote UE1 to the base station, the U2N relay UE2 caches the message and triggers the relay UE2 to initiate a remote UE information report. The remote UE information report includes the Uu interface identification information of the remote UE1 (the 5G-S-TMSI of the remote UE1); the PC5 interface identification information of the remote UE1 (the Layer-2 ID of the remote UE1); the RRC status of the remote UE1 (RRC IDLE status); the paging reception requirement (the remote UE1 does not need the U2N relay UE2 to perform paging forwarding); the receipt of the Uu RRC message from the remote UE1; and the relay connection status (a relay connection exists between the U2N relay UE2 and the remote UE1).

[0236] Remote UE information reports can be either existing RRC messages or newly introduced RRC messages.

[0237] Step 96: After receiving the remote UE information report sent by U2N relay UE2, base station 1 assigns a local U2N relay identifier 1 to remote UE1, and sends the assigned local U2N relay identifier 1, its correspondence with remote UE1, and the Uu SRB configuration of remote UE1 to U2N relay UE2 via signaling. The Uu SRB of remote UE1 includes, but is not limited to, SRB0 and / or SRB1 and / or SRB2 and / or SRB3 and combinations thereof. The Uu SRB configuration of remote UE1 includes, but is not limited to, SDAP configuration, PDCP configuration, adaptation layer configuration, RLC configuration, MAC configuration, logical channel configuration, and physical layer configuration.

[0238] Step 97: After receiving the message from step 96, U2N relay UE2 establishes various entities (including but not limited to SDAP, PDCP, adaptation layer, RLC, and MAC entities) for the remote UE based on the configuration information, and sends the cached RRC establishment request message of the remote UE1 to base station 1.

[0239] Step 98: Base station 1 sends an RRC establishment message to remote UE1 through U2N relay UE2 and U2U relay UE1.

[0240] Step 99: Remote UE1 sends an RRC establishment complete message to base station 1 through U2N relay UE2 and U2U relay UE1.

[0241] In steps 97-99 above, U2N relay UE2 performs remote UE channel mapping through the local U2N relay identifier.

[0242] Example 5:

[0243] Remote UE1 accesses base station 1 via U2U relay UE1 and U2N relay UE2. U2N relay UE2 is in connected state, and its active BWP is not configured with a common coreset. Remote UE1 forwards paging requests through U2N relay UE2. Figure 10 As shown, this example includes:

[0244] Steps 101, 101a, 102 and 102a are the same as steps 91, 91a, 92 and 92a in Example 4.

[0245] Step 103: The remote UE1 sends its Uu interface identification information (the remote UE's 5G-S-TMSI), the remote UE's PC5 interface identification information (the remote UE's Layer-2 ID), the remote UE's RRC status (RRC IDLE), and the paging reception request (the remote UE needs the relay UE to perform paging forwarding) to the U2U relay UE1. The U2U relay UE1 then sends the information from the remote UE1 to the U2N relay UE2.

[0246] Step 104: After receiving the information from the remote UE1, the U2N relay UE2 triggers the U2N relay UE2 to initiate a remote UE information report. The remote UE information report includes the Uu interface identification information of the remote UE1 (the 5G-S-TMSI of the remote UE1); the PC5 interface identification information of the remote UE1 (the Layer-2 ID of the remote UE1); the RRC status of the remote UE1 (RRC IDLE status); the paging reception request (the remote UE1 needs the U2N relay UE2 to perform paging forwarding); no Uu RRC message received from the remote UE1; and the relay connection status (a relay connection exists between the U2N relay UE2 and the remote UE1).

[0247] Step 105: After receiving the remote UE information report from relay UE1, the base station knows that U2N relay UE2 needs to forward paging for remote UE1, and that the active BWP of U2N relay UE2 is not configured with a common CORESET. Therefore, it determines that the paging method of remote UE1 is to send the paging to relay UE1 via dedicated signaling.

[0248] Step 106: Base station 1 uses dedicated signaling to send the paging message of remote UE1 to U2N relay UE2.

[0249] Step 107: U2N relay UE2 forwards the paging of remote UE1 to U2U relay UE1 via SL signaling, and U2U relay UE1 then sends it to remote UE1.

[0250] The various methods of the embodiments of the present invention have been described above. Apparatus for implementing the above methods will now be provided.

[0251] Please refer to Figure 11 This invention provides a first relay terminal, comprising:

[0252] The sending unit 111 is used to send information of a remote terminal to the base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes the user-to-network Uu interface identifier and / or the direct communication PC5 interface identifier of the remote terminal.

[0253] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0254] Optionally, the information of the remote terminal may also include at least one of the following:

[0255] The remote terminal's wireless connection control RRC status;

[0256] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0257] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0258] The connection status of the direct communication link of the remote terminal.

[0259] Optionally, the first relay terminal further includes:

[0260] The first receiving unit is configured to receive information from the remote terminal via a direct communication link with the remote terminal before sending the information of the remote terminal to the base station.

[0261] Optionally, the information of the remote terminal is sent by the remote terminal after establishing a direct communication link with the first relay terminal.

[0262] Optionally, when a preset condition is met, the first relay terminal sends the information of the remote terminal to the base station, wherein the preset condition includes at least one of the following:

[0263] First preset condition: The remote terminal is in RRC idle state or inactive state, the first relay terminal is in RRC connected state, and the first relay terminal is not configured with common control resource set CORESET and / or common search space;

[0264] Second preset condition: The first relay terminal receives the first Uu RRC message sent by the remote terminal from the direct communication link;

[0265] Third preset condition: The first relay terminal detects that the wireless link between it and the remote terminal is interrupted.

[0266] Optionally, the first relay terminal further includes:

[0267] A caching unit is configured to cache the first Uu RRC message when the second preset condition is met;

[0268] The second receiving unit is configured to receive and store the correspondence between the PC5 interface identifier and the local relay identifier of the remote terminal sent by the base station, wherein the local relay identifier is identification information allocated by the base station to identify the remote terminal on the Uu interface of the first relay terminal and the base station; and / or, receive the Uu interface configuration information of the remote terminal sent by the base station, and perform Uu interface configuration according to the Uu interface configuration information of the remote terminal, wherein the Uu interface configuration information includes SRB and / or DRB configuration information.

[0269] Optionally, the second receiving unit is further configured to configure an entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, RLC layer and MAC layer.

[0270] Optionally, the first relay terminal further includes:

[0271] The sending processing unit is used to add the local relay identifier corresponding to the remote terminal to the adaptation layer header of the first Uu RRC message and then send it to the base station.

[0272] Optionally, the first relay terminal further includes:

[0273] The receiving and processing unit is configured to receive a first Uu RRC message sent by the base station, determine the first remote terminal corresponding to the first local relay identifier based on the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier stored locally and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, and send the first Uu RRC message to the first remote terminal.

[0274] Optionally, the first relay terminal further includes:

[0275] The link interruption processing unit is configured to send indication information to the base station, indicating that the wireless link between the remote terminal and the first relay terminal is interrupted, when a wireless link interruption is detected with the remote terminal.

[0276] It should be noted that the device in this embodiment is the same as the one described above. Figure 4 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0277] Please refer to Figure 12 The present invention provides a schematic diagram of a remote terminal information sending device. The device is applied to a first relay terminal and specifically includes: a processor 1201, a transceiver 1202, a memory 1203, a user interface 1204, and a bus interface.

[0278] In this embodiment of the invention, the device further includes a program stored on memory 1203 and executable on processor 1201.

[0279] The transceiver 1202 is used to send and receive data under the control of the processor;

[0280] The processor 1201 is used to read the computer program in the memory and perform the following operations:

[0281] Send information about a remote terminal to the base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the user-to-network Uu interface identifier and the direct communication PC5 interface identifier of the remote terminal.

[0282] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0283] Optionally, the information of the remote terminal may also include at least one of the following:

[0284] The remote terminal's wireless connection control RRC status;

[0285] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0286] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0287] The connection status of the direct communication link of the remote terminal.

[0288] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0289] Before sending the information of the remote terminal to the base station, the information of the remote terminal is received through a direct communication link with the remote terminal.

[0290] Optionally, the information of the remote terminal is sent by the remote terminal after establishing a direct communication link with the first relay terminal.

[0291] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0292] When preset conditions are met, the information of the remote terminal is sent to the base station, wherein the preset conditions include at least one of the following:

[0293] First preset condition: The remote terminal is in RRC idle state or inactive state, the first relay terminal is in RRC connected state, and the first relay terminal is not configured with common control resource set CORESET and / or common search space;

[0294] Second preset condition: The first relay terminal receives the first Uu RRC message sent by the remote terminal from the direct communication link;

[0295] Third preset condition: The first relay terminal detects that the wireless link between it and the remote terminal is interrupted.

[0296] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0297] If the second preset condition is met, the first Uu RRC message is cached, and after sending the information of the remote terminal to the base station:

[0298] Receive and save the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier sent by the base station. The local relay identifier is the identification information allocated by the base station to identify the remote terminal on the Uu interface of the first relay terminal and the base station.

[0299] And / or,

[0300] The system receives the Uu interface configuration information of the remote terminal sent by the base station, and performs Uu interface configuration according to the Uu interface configuration information of the remote terminal, wherein the Uu interface configuration information includes SRB and / or DRB configuration information.

[0301] Optionally, the configuration of the execution Uu interface includes:

[0302] Configure the entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, RLC layer and MAC layer.

[0303] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0304] After adding the local relay identifier corresponding to the remote terminal to the adaptation layer header of the first Uu RRC message, it is sent to the base station.

[0305] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0306] The system receives a first Uu RRC message sent by the base station to the remote terminal. Based on the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier stored locally and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, the system determines the first remote terminal corresponding to the first local relay identifier and sends the first Uu RRC message to the first remote terminal.

[0307] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0308] If a wireless link interruption is detected with the remote terminal, an indication message is sent to the base station to indicate that the wireless link between the remote terminal and the first relay terminal has been interrupted.

[0309] Understandably, in this embodiment of the invention, the computer program executed by the processor 1201 can achieve the above-mentioned functions. Figure 4 The various processes of the method embodiments shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0310] exist Figure 12In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 1201 and memory represented by memory 1203 together. The bus architecture can also link various other circuits such as peripheral devices, 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 an interface. Transceiver 1202 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium. For different user equipment, user interface 1204 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0311] The processor 1201 is responsible for managing the bus architecture and general processing, and the memory 1203 can store the data used by the processor 1201 when performing operations.

[0312] It should be noted that the device in this embodiment is the same as the one described above. Figure 4 The device corresponding to the method shown above is applicable to the embodiments of this device and can achieve the same technical effect. In this device, the transceiver 1202 and the memory 1203, as well as the transceiver 1202 and the processor 1201, can be connected via a bus interface. The functions of the processor 1201 can also be implemented by the transceiver 1202, and vice versa. It should be noted that the device provided in this embodiment can implement all the method steps of the above method embodiments and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiments will not be described in detail here.

[0313] In some embodiments of the present invention, a computer-readable storage medium is also provided, on which a program is stored, which, when executed by a processor, performs the following steps:

[0314] Send information about a remote terminal to the base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the user-to-network Uu interface identifier and the direct communication PC5 interface identifier of the remote terminal.

[0315] When this program is executed by the processor, it can achieve the above. Figure 4 All implementations of the remote terminal information transmission method shown herein achieve the same technical effect, and will not be described again here to avoid repetition.

[0316] The embodiments of the present invention provide Figure 13 The base station shown includes:

[0317] The receiving unit 131 is used to receive information of a remote terminal sent by a first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes the Uu interface identifier and the PC5 interface identifier of the remote terminal.

[0318] Processing unit 132 is configured to perform at least one of the following processes based on the information from the remote terminal:

[0319] Assign a local relay identifier for identifying the remote terminal on the Uu interface of the first relay terminal and the base station, determine a first correspondence between the Uu interface identifier, PC5 interface identifier and local relay identifier of the remote terminal, and send a second correspondence between the PC5 interface identifier and local relay identifier of the remote terminal to the first relay terminal.

[0320] Configure the entity corresponding to the Uu interface of the remote terminal, and send the Uu interface configuration information of the remote terminal to the first relay terminal. The Uu interface configuration information includes the configuration information of SRB and / or DRB.

[0321] Determine the paging transmission method of the remote terminal.

[0322] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0323] Optionally, the information of the remote terminal may also include at least one of the following:

[0324] The remote terminal's wireless connection control RRC status;

[0325] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0326] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0327] The connection status of the direct communication link of the remote terminal.

[0328] Optionally, the base station further includes:

[0329] Interactive processing unit, used for:

[0330] The system receives the second Uu RRC message from the remote terminal sent by the first relay terminal, determines the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier based on the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first correspondence stored locally, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal.

[0331] And / or,

[0332] When sending the third Uu RRC message of the third remote terminal to the first relay terminal, the local relay identifier corresponding to the third remote terminal is determined according to the first correspondence stored locally and added to the adaptation layer header of the third Uu RRC message before being sent to the first relay terminal.

[0333] Optionally, the paging transmission method includes one or more of the following:

[0334] First transmission method: The base station transmits the paging message of the remote terminal through the paging channel when the remote terminal is paging.

[0335] The second transmission method: The base station sends the paging message of the remote terminal to the relay terminal through dedicated signaling, and the relay terminal forwards it to the remote terminal.

[0336] Optionally, the processing unit is further configured to determine the paging transmission method of the remote terminal in at least one of the following ways:

[0337] If the information from the remote terminal indicates that the direct communication link of the remote terminal has been interrupted and no information from the remote terminal other than the first relay terminal has been received from the other relay terminal, then the paging transmission method of the remote terminal is determined to be the first transmission method.

[0338] If no public CORESET and / or public search space are configured on the active BWP of the first relay terminal, the paging transmission method of the remote terminal is determined to be the second transmission method or both the first transmission method and the second transmission method are used simultaneously.

[0339] When a public CORESET and / or public search space are configured on the activated BWP of the first relay terminal, the paging transmission mode of the remote terminal is determined to be the first transmission mode.

[0340] Optionally, the base station further includes:

[0341] The link interruption handling unit is configured to receive indication information sent by the first relay terminal indicating a wireless link interruption between the fourth remote terminal and the first relay terminal; according to the indication information, release the relevant configuration of the fourth remote terminal, delete the local relay identifier allocated to the fourth remote terminal, and delete the second correspondence between the Uu interface identifier of the fourth remote terminal and the local relay identifier; and determine the paging transmission mode of the fourth remote terminal based on the information of the fourth remote terminal reported by each relay terminal.

[0342] It should be noted that the device in this embodiment is the same as the one described above. Figure 5 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. It should be noted that the devices provided in this embodiment can implement all the method steps implemented in the above-described method embodiments and achieve the same technical effects. Therefore, the parts and beneficial effects that are the same as those in the method embodiments will not be described in detail here.

[0343] Please refer to Figure 14 This invention provides a schematic diagram of a remote terminal information receiving device. This device is applied to a base station and specifically includes: a processor 1401, a transceiver 1402, a memory 1403, and a bus interface, wherein:

[0344] In this embodiment of the invention, the device further includes: a program stored on memory 1403 and executable on processor 1401.

[0345] The transceiver 1402 is used to send and receive data under the control of the processor;

[0346] The processor 1401 is configured to read the computer program in the memory and perform the following operations:

[0347] The system receives information about a remote terminal sent by a first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the Uu interface identifier and the PC5 interface identifier of the remote terminal.

[0348] Based on the information from the remote terminal, perform at least one of the following processes:

[0349] Assign a local relay identifier for identifying the remote terminal on the Uu interface of the first relay terminal and the base station, determine a first correspondence between the Uu interface identifier, PC5 interface identifier and local relay identifier of the remote terminal, and send a second correspondence between the PC5 interface identifier and local relay identifier of the remote terminal to the first relay terminal.

[0350] Configure the entity corresponding to the Uu interface of the remote terminal, and send the Uu interface configuration information of the remote terminal to the first relay terminal. The Uu interface configuration information includes the configuration information of SRB and / or DRB.

[0351] Determine the paging transmission method of the remote terminal.

[0352] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0353] Optionally, the information of the remote terminal may also include at least one of the following:

[0354] The remote terminal's wireless connection control RRC status;

[0355] The paging reception request information of the remote terminal is used to indicate whether a relay terminal is needed to forward the paging.

[0356] Whether the first relay terminal receives the Uu RRC message from the remote terminal;

[0357] The connection status of the direct communication link of the remote terminal.

[0358] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0359] The system receives the second Uu RRC message from the remote terminal sent by the first relay terminal, determines the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier based on the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first correspondence stored locally, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal.

[0360] And / or,

[0361] When sending the third Uu RRC message of the third remote terminal to the first relay terminal, the local relay identifier corresponding to the third remote terminal is determined according to the first correspondence stored locally and added to the adaptation layer header of the third Uu RRC message before being sent to the first relay terminal.

[0362] Optionally, the paging transmission method includes one or more of the following:

[0363] First transmission method: The base station transmits the paging message of the remote terminal through the paging channel when the remote terminal is paging.

[0364] Second transmission method: The base station sends the paging message of the remote terminal to the relay terminal through dedicated signaling, and the relay terminal forwards it to the remote terminal;

[0365] Third transmission method: Simultaneously employing the first transmission method and the second transmission method.

[0366] Optionally, determining the paging transmission method of the remote terminal includes at least one of the following:

[0367] If the information from the remote terminal indicates that the direct communication link of the remote terminal has been interrupted and no information from the remote terminal other than the first relay terminal has been received from the other relay terminal, then the paging transmission method of the remote terminal is determined to be the first transmission method.

[0368] If no public CORESET and / or public search space are configured on the active BWP of the first relay terminal, the paging transmission mode of the remote terminal is determined to be the second transmission mode or the third transmission mode.

[0369] When a public CORESET and / or public search space are configured on the activated BWP of the first relay terminal, the paging transmission mode of the remote terminal is determined to be the first transmission mode.

[0370] Optionally, the processor is further configured to read the computer program in the memory and perform the following operations:

[0371] Receive indication information sent by the first relay terminal to indicate that the wireless link between the fourth remote terminal and the first relay terminal has been interrupted;

[0372] According to the instruction information, release the relevant configuration of the fourth remote terminal, delete the local relay identifier allocated to the fourth remote terminal, and delete the second correspondence between the Uu interface identifier of the fourth remote terminal and the local relay identifier. Based on the information of the fourth remote terminal reported by each relay terminal, determine the paging transmission method of the fourth remote terminal.

[0373] Understandably, in this embodiment of the invention, the computer program executed by the processor 1401 can achieve the above-mentioned functions. Figure 5 The various processes of the method embodiments shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0374] exist Figure 14In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, including one or more processors represented by processor 1401 and memory represented by memory 1403. The bus architecture can also link together various other circuits such as peripheral devices, 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 an interface. The transceiver 1402 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium.

[0375] The processor 1401 is responsible for managing the bus architecture and general processing, while the memory 1403 can store the data used by the processor 1401 when performing operations.

[0376] It should be noted that the terminal in this embodiment is the same as the one described above. Figure 5 The device corresponding to the method shown above, and the implementation methods in each embodiment above, are all applicable to the embodiments of this terminal, and can achieve the same technical effect. In this device, the transceiver 1402 and the memory 1403, as well as the transceiver 1402 and the processor 1401, can be connected for communication via a bus interface. The function of the processor 1401 can also be implemented by the transceiver 1402, and the function of the transceiver 1402 can also be implemented by the processor 1401. It should be noted that the device provided by the embodiments of the present invention can implement all the method steps implemented in the above method embodiments and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail.

[0377] In some embodiments of the present invention, a computer-readable storage medium is also provided, on which a program is stored, which, when executed by a processor, performs the following steps:

[0378] The system receives information about a remote terminal sent by a first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information about the remote terminal includes the Uu interface identifier and the PC5 interface identifier of the remote terminal.

[0379] Based on the information from the remote terminal, perform at least one of the following processes:

[0380] Assign a local relay identifier for identifying the remote terminal on the Uu interface of the first relay terminal and the base station, determine a first correspondence between the Uu interface identifier, PC5 interface identifier and local relay identifier of the remote terminal, and send a second correspondence between the PC5 interface identifier and local relay identifier of the remote terminal to the first relay terminal.

[0381] Configure the entity corresponding to the Uu interface of the remote terminal, and send the Uu interface configuration information of the remote terminal to the first relay terminal. The Uu interface configuration information includes the configuration information of SRB and / or DRB.

[0382] Determine the paging transmission method of the remote terminal.

[0383] When executed by the processor, this program can implement all the above-mentioned methods for receiving remote terminal information applied to the base station, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0384] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0385] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0386] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0387] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention, depending on actual needs.

[0388] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0389] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0390] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method of transmitting remote terminal information, characterized by, Comprising: The first relay terminal sends information of a remote terminal to a base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal comprises a user-to-network (Uu) interface identifier and / or a direct communication (PC5) interface identifier of the remote terminal; Before sending the information of the remote terminal to the base station, the method further comprises: the first relay terminal receiving the information of the remote terminal through a direct communication link between the first relay terminal and the remote terminal; The first relay terminal sends the information of the remote terminal to the base station when a preset condition is met, wherein the preset condition comprises at least one of the following: A first preset condition: the remote terminal is in an RRC idle state or an RRC inactive state, the first relay terminal is in an RRC connected state, and the first relay terminal is not configured with a common control resource set (CORESET) and / or a common search space; A second preset condition: the first relay terminal receives a first Uu RRC message sent by the remote terminal on the direct communication link; A third preset condition: the first relay terminal detects that a wireless link between the remote terminal is interrupted.

2. The method of claim 1, wherein, The information of the remote terminal further comprises at least one of the following information: A radio resource control (RRC) state of the remote terminal; Paging reception requirement information of the remote terminal, wherein the paging reception requirement information is used to indicate whether a relay terminal is needed for paging forwarding; Whether the first relay terminal receives a Uu RRC message of the remote terminal; A connection state of a direct communication link of the remote terminal.

3. The method of claim 1, wherein, In the case where the second preset condition is met, the first relay terminal caches the first Uu RRC message, and after sending the information of the remote terminal to the base station, the method further comprises: The first relay terminal receives and saves a correspondence between a PC5 interface identifier of the remote terminal and a local relay identifier sent by the base station, wherein the local relay identifier is an identifier information allocated by the base station for identifying the remote terminal on a Uu interface between the first relay terminal and the base station; And / or, The first relay terminal receives Uu interface configuration information of the remote terminal sent by the base station, and performs configuration of the Uu interface according to the Uu interface configuration information of the remote terminal, wherein the Uu interface configuration information comprises configuration information of a SRB and / or a DRB.

4. The method of claim 3, wherein, The configuration of the Uu interface comprises: Configuring entities corresponding to the Uu interface for the remote terminal in at least one of a local adaptation layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.

5. The method of claim 3, wherein, Further comprising: The first relay terminal sends the local relay identifier corresponding to the remote terminal to the base station after adding the local relay identifier in an adaptation layer header of the first Uu RRC message.

6. The method of claim 5, wherein, Further comprising: The first relay terminal receives a first Uu RRC message sent by a base station, determines a first remote terminal corresponding to a first local relay identifier according to a correspondence relationship between a locally saved PC5 interface identifier of the remote terminal and the first local relay identifier carried in an adaptation layer header of the first Uu RRC message, and sends the first Uu RRC message to the first remote terminal.

7. The method of claim 4, wherein, Further comprising: The first relay terminal sends indication information indicating that the wireless link between the remote terminal and the first relay terminal is interrupted to the base station in a case where it is detected that the wireless link is interrupted.

8. A method of receiving remote terminal information, characterized by, Comprising: The base station receives information of a remote terminal sent by a first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal comprises a Uu interface identifier and a PC5 interface identifier of the remote terminal; The base station performs at least one of the following processes according to the information of the remote terminal: allocates a local relay identifier for identifying the remote terminal on a Uu interface between the first relay terminal and the base station, determines a first correspondence relationship between the Uu interface identifier, the PC5 interface identifier and the local relay identifier of the remote terminal, and sends a second correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal to the first relay terminal; configures an entity corresponding to the Uu interface of the remote terminal, and sends Uu interface configuration information of the remote terminal to the first relay terminal, wherein the Uu interface configuration information comprises configuration information of SRB and / or DRB; determines a paging sending mode of the remote terminal; The information of the remote terminal is sent when a preset condition is met, wherein the preset condition comprises at least one of the following: a first preset condition: the remote terminal is in an RRC idle state or an inactive state, the first relay terminal is in an RRC connected state, and the first relay terminal is not configured with a common control resource set (CORESET) and / or a common search space; a second preset condition: the first relay terminal receives a first Uu RRC message sent by the remote terminal from a direct communication link between the first relay terminal and the remote terminal; a third preset condition: the first relay terminal detects that the wireless link with the remote terminal is interrupted.

9. The method of claim 8, wherein, The information of the remote terminal further comprises at least one of the following information: a radio resource control (RRC) state of the remote terminal; paging reception requirement information of the remote terminal, wherein the paging reception requirement information is used to indicate whether a relay terminal is needed for paging forwarding; whether the first relay terminal receives a Uu RRC message of the remote terminal; a connection state of a direct communication link of the remote terminal.

10. The method of claim 8, wherein, Further comprising: The base station receives the second Uu RRC message of the remote terminal sent by the first relay terminal, determines the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier carried in the adaptation layer header of the second Uu RRC message according to the second local relay identifier and the locally saved first correspondence relationship, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal. And / or, When the base station sends the third Uu RRC message of the third remote terminal to the first relay terminal, the base station determines the local relay identifier corresponding to the third remote terminal according to the locally saved first correspondence relationship, adds the local relay identifier in the adaptation layer header of the third Uu RRC message, and sends the third Uu RRC message to the first relay terminal.

11. The method of claim 8, wherein, The paging sending mode includes one or more of the following modes: The first sending mode: the base station sends the paging message of the remote terminal to the remote terminal through the paging channel at the paging occasion of the remote terminal; The second sending mode: the base station sends the paging message of the remote terminal to the relay terminal through dedicated signaling, and forwards the paging message to the remote terminal through the relay terminal.

12. The method of claim 11, wherein, The determination of the paging sending mode of the remote terminal includes at least one of the following: In the case that the information of the remote terminal indicates that the direct communication link of the remote terminal is interrupted and no information of the remote terminal sent by the relay terminal other than the first relay terminal is received, the paging sending mode of the remote terminal is determined as the first sending mode; In the case that no common CORESET and / or common search space is configured on the active BWP of the first relay terminal, the paging sending mode of the remote terminal is determined as the second sending mode or simultaneously using the first sending mode and the second sending mode; In the case that the common CORESET and / or common search space is configured on the active BWP of the first relay terminal, the paging sending mode of the remote terminal is determined as the first sending mode.

13. The method of claim 8, wherein, Further comprising: The base station receives the indication information sent by the first relay terminal, which indicates that the wireless link between the fourth remote terminal and the first relay terminal is interrupted; The base station releases the related configuration of the fourth remote terminal according to the indication information, deletes the local relay identifier allocated for the fourth remote terminal, and deletes the second correspondence relationship between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and determines the paging sending mode of the fourth remote terminal based on the information of the fourth remote terminal reported by each relay terminal.

14. A device for transmitting remote terminal information, characterized by Applied to the first relay terminal, comprising a memory, a transceiver and a processor, wherein, The memory is used to store computer programs; The transceiver is used to transceive data under the control of the processor; The processor is used to read the computer programs in the memory and perform the following operations: Send the information of the remote terminal to the base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes the user-to-network Uu interface identifier and the direct communication PC5 interface identifier of the remote terminal; The processor is further configured to read the computer program in the memory and perform the following operations: receiving the information of the remote terminal through a direct communication link between the remote terminal and the first relay terminal before transmitting the information of the remote terminal to the base station; transmitting the information of the remote terminal to the base station when a preset condition is met, wherein the preset condition comprises at least one of the following: a first preset condition: the remote terminal is in an RRC idle state or an inactive state, the first relay terminal is in an RRC connected state, and the first relay terminal is not configured with a common control resource set (CORESET) and / or a common search space; a second preset condition: the first relay terminal receives a first Uu RRC message transmitted by the remote terminal on the direct communication link; a third preset condition: the first relay terminal detects that a wireless link between the remote terminal is interrupted.

15. The apparatus of claim 14, wherein, The information of the remote terminal further comprises at least one of the following: a radio resource control (RRC) state of the remote terminal; paging reception requirement information of the remote terminal, wherein the paging reception requirement information is used to indicate whether a relay terminal is required to perform paging forwarding; whether the first relay terminal receives a Uu RRC message of the remote terminal; a connection state of the direct communication link of the remote terminal.

16. The apparatus of claim 14, wherein, The processor is further configured to read the computer program in the memory and perform the following operations: when the second preset condition is met, buffering the first Uu RRC message, and after transmitting the information of the remote terminal to the base station: receiving and saving a correspondence relationship between a PC5 interface identifier of the remote terminal and a local relay identifier transmitted by the base station, wherein the local relay identifier is identifier information allocated by the base station to identify the remote terminal on a Uu interface between the first relay terminal and the base station; and / or, receiving Uu interface configuration information of the remote terminal transmitted by the base station, and performing configuration of the Uu interface according to the Uu interface configuration information of the remote terminal, wherein the Uu interface configuration information comprises configuration information of an SRB and / or a DRB.

17. The apparatus of claim 16, wherein, The configuration of the Uu interface comprises: configuring an entity corresponding to the Uu interface of the remote terminal in at least one of a local adaptation layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.

18. The apparatus of claim 16, wherein, The processor is further configured to read the computer program in the memory and perform the following operations: transmitting the first Uu RRC message to the base station after adding the local relay identifier corresponding to the remote terminal in an adaptation layer header of the first Uu RRC message.

19. The apparatus of claim 18, wherein, The processor is further configured to read the computer program in the memory and perform the following operations: receiving a first Uu RRC message transmitted by the base station to the remote terminal, determining a first remote terminal corresponding to a first local relay identifier according to a correspondence relationship between a PC5 interface identifier of the remote terminal and a local relay identifier saved locally and the first local relay identifier carried in an adaptation layer header of the first Uu RRC message, and transmitting the first Uu RRC message to the first remote terminal.

20. The apparatus of claim 17, wherein, The processor is further configured to read the computer program in the memory and perform the following operations: In the case of detecting that the wireless link between the remote terminal is interrupted, sending indication information indicating that the wireless link between the remote terminal and the first relay terminal is interrupted to the base station.

21. A first relay terminal, comprising: Comprise: The sending unit is configured to send information of the remote terminal to the base station, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal comprises a user-to-network (Uu) interface identifier and / or a direct communication (PC5) interface identifier of the remote terminal; The first relay terminal further comprises: The first receiving unit is configured to receive the information of the remote terminal through the direct communication link between the remote terminal and the first relay terminal before sending the information of the remote terminal to the base station; The sending unit is further configured to send the information of the remote terminal to the base station when a preset condition is met, wherein the preset condition comprises at least one of the following: A first preset condition: the remote terminal is in an RRC idle state or an inactive state, the first relay terminal is in an RRC connected state, and the first relay terminal is not configured with a common control resource set (CORESET) and / or a common search space; A second preset condition: the first relay terminal receives a first Uu RRC message sent by the remote terminal on the direct communication link; A third preset condition: the first relay terminal detects that the wireless link between the remote terminal is interrupted.

22. A reception apparatus of remote terminal information, characterized by comprising: Applied to a base station, comprising a memory, a transceiver and a processor, wherein, The memory is configured to store a computer program; The transceiver is configured to transceive 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 the information of the remote terminal sent by the first relay terminal, wherein the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal comprises a Uu interface identifier and a PC5 interface identifier of the remote terminal; According to the information of the remote terminal, at least one of the following processes is performed: Allocate a local relay identifier for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, determine a first correspondence relationship between the Uu interface identifier, the PC5 interface identifier and the local relay identifier of the remote terminal, and send a second correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal to the first relay terminal; Configure an entity corresponding to the Uu interface of the remote terminal, send Uu interface configuration information of the remote terminal to the first relay terminal, and the Uu interface configuration information comprises configuration information of SRB and / or DRB; Determine the paging sending mode of the remote terminal; The information of the remote terminal is sent when a preset condition is met, wherein the preset condition comprises at least one of the following: A first preset condition: the remote terminal is in an RRC idle state or an inactive state, the first relay terminal is in an RRC connected state, and the first relay terminal is not configured with a common control resource set (CORESET) and / or a common search space; A second preset condition: the first relay terminal receives a first Uu RRC message sent by the remote terminal from a direct communication link between the first relay terminal and the remote terminal; A third preset condition: the first relay terminal detects that a wireless link with the remote terminal is interrupted.

23. The apparatus of claim 22, wherein, The information of the remote terminal further includes at least one of the following information: A radio connection control (RRC) state of the remote terminal; Paging reception requirement information of the remote terminal, the paging reception requirement information being used to indicate whether a relay terminal needs to perform paging forwarding; Whether the first relay terminal receives a Uu RRC message of the remote terminal; A connection state of the direct communication link of the remote terminal.

24. The apparatus of claim 22, wherein, The processor is further configured to read a computer program in the memory and perform the following operations: receiving a second Uu RRC message of the remote terminal sent by the first relay terminal, determining a Uu interface identifier of a second remote terminal corresponding to a second local relay identifier carried in an adaptation layer header of the second Uu RRC message according to the second local relay identifier and the first correspondence relationship stored locally, and processing the second Uu RRC message based on the Uu interface identifier of the second remote terminal; and / or, when sending a third Uu RRC message of a third remote terminal to the first relay terminal, determining a local relay identifier corresponding to the third remote terminal according to the first correspondence relationship stored locally and adding the local relay identifier in an adaptation layer header of the third Uu RRC message before sending the third Uu RRC message to the first relay terminal.

25. The apparatus of claim 22, wherein, The paging sending mode includes one or more of the following modes: A first sending mode: the base station sends a paging message of the remote terminal to the remote terminal through a paging channel at a paging occasion of the remote terminal; A second sending mode: the base station sends a paging message of the remote terminal to the relay terminal through dedicated signaling and forwards the paging message to the remote terminal through the relay terminal; A third sending mode: the first sending mode and the second sending mode are used simultaneously.

26. The apparatus of claim 25, wherein, The determination of the paging sending mode of the remote terminal includes at least one of the following: in a case where the information of the remote terminal indicates that the direct communication link of the remote terminal is interrupted and no information of the remote terminal sent by a relay terminal other than the first relay terminal is received, determining that the paging sending mode of the remote terminal is the first sending mode; in a case where no common control resource set (CORESET) and / or common search space are configured on an active BWP of the first relay terminal, determining that the paging sending mode of the remote terminal is the second sending mode or the third sending mode; in a case where the common CORESET and / or the common search space are configured on the active BWP of the first relay terminal, determining that the paging sending mode of the remote terminal is the first sending mode.

27. The apparatus of claim 22, wherein, The processor is further configured to read a computer program in the memory and perform the following operations: receiving indication information sent by the first relay terminal and used to indicate that a wireless link between a fourth remote terminal and the first relay terminal is interrupted; According to the indication information, release the related configuration of the fourth remote terminal, delete the local relay identifier allocated for the fourth remote terminal, and delete the second correspondence relationship between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and determine the paging sending mode of the fourth remote terminal based on the information of the fourth remote terminal reported by each relay terminal.

28. A base station, comprising: Comprise: A receiving unit configured to receive information of a remote terminal sent by a first relay terminal, wherein the remote terminal accesses a base station through the first relay terminal, and the information of the remote terminal comprises a Uu interface identifier and a PC5 interface identifier of the remote terminal; A processing unit configured to perform at least one of the following processes according to the information of the remote terminal: Allocate a local relay identifier for identifying the remote terminal on a Uu interface between the first relay terminal and the base station, determine a first correspondence relationship between the Uu interface identifier, the PC5 interface identifier and the local relay identifier of the remote terminal, and send a second correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal to the first relay terminal; Configure an entity corresponding to the Uu interface of the remote terminal, and send Uu interface configuration information of the remote terminal to the first relay terminal, wherein the Uu interface configuration information comprises configuration information of SRB and / or DRB; Determine a paging sending mode of the remote terminal; Wherein, the information of the remote terminal is sent when a preset condition is met, wherein the preset condition comprises at least one of the following: A first preset condition: the remote terminal is in an RRC idle state or an inactive state, the first relay terminal is in an RRC connected state, and the first relay terminal is not configured with a common control resource set (CORESET) and / or a common search space; A second preset condition: the first relay terminal receives a first Uu RRC message sent by the remote terminal from a direct communication link between the first relay terminal and the remote terminal; A third preset condition: the first relay terminal detects that the wireless link between the remote terminal is interrupted.

29. A processor-readable storage medium, comprising: The processor readable storage medium stores a computer program, which is used to make the processor execute the method of any one of claims 1 to 7, or used to make the processor execute the method of any one of claims 8 to 13.

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