Method and Device for Transmitting and Receiving Remote Terminal Information

Abstract

A method and device for transmitting and receiving remote terminal information, the method including a first relay terminal transmitting to a base station information of a remote terminal, the remote terminal accessing the base station via the first relay terminal, the information of the remote terminal including a Uu interface identifier and / or a PC5 interface identifier of the remote terminal.

Description

Technical Field

[0001] Cross-reference to Related Applications This application claims the priority of Chinese Patent Application No. 202111228150.4, filed in China on October 21, 2021, the entire content of which is incorporated herein by reference. The present disclosure relates to the technical field of mobile communications, and specifically, to a method for transmitting remote terminal information, a method for receiving the same, and a device.

Background Art

[0002] As shown in FIG. 1, in conventional wireless communication, a cellular network communication method is used. That is, a terminal and a network-side device transmit uplink and downlink data / control information via a general user-to-network interface (User to Network interface universal, Uu). The Uu interface is also called a user network interface or an air interface.

[0003] As shown in FIG. 2, the sidelink refers to a method in which adjacent terminals can transmit data via a sidelink (also called Sidelink or PC5) within a short-distance range. The wireless interface corresponding to the Sidelink is a sidelink interface (also called a Sidelink interface or a PC5 interface).

[0004] To expand the network coverage, the introduction of the UE-to-Network Relay method was considered. In the above relay method, the relay node may be a terminal having a relay function. As shown in FIG. 3, in the case of UE-to-Network Relay, the Uu interface is used as the interface between the relay and the network, and the PC5 interface is used as the interface between the relay and the terminal to be relayed (User Equipment, UE, abbreviated as remote UE in this application). The link between the relay UE and the network may be called a backhaul link from the perspective of the remote UE.

[0005] In the scene shown in FIG. 3, the remote terminal may need the assistance of the relay terminal to receive paging from the network to the remote terminal, which may affect the data transmission and reception of the relay terminal in the Radio Resource Control (RRC) connected state. Also, when the relay terminal transmits the initial Uu signaling of the remote terminal, it does not carry a local relay identifier that can identify the remote terminal assigned by the base station.

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0006] At least one embodiment of the present disclosure realizes notifying the base station of information of a remote terminal connected to a relay terminal, and can assist in the assignment of a local relay identifier to the remote terminal by the base station or the determination of the paging method for the remote terminal based on the above information, and provides a method and device for transmitting and receiving remote terminal information.

MEANS FOR SOLVING THE PROBLEMS

[0007] According to one aspect of the present disclosure, at least one embodiment is a method for transmitting remote terminal information, comprising: A method is provided in which a first relay terminal transmits information of a remote terminal to a base station, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information including a user-to-network (Uu) interface identifier and / or a sidelink (PC5) interface identifier of the remote terminal.

[0008] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal, and paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is necessary, and information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and at least one of information on the sidelink connection status of the remote terminal.

[0009] Also, according to at least one embodiment of the present disclosure, before transmitting the information of the remote terminal to the base station, the method further includes the first relay terminal receiving the information of the remote terminal via a sidelink with the remote terminal.

[0010] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal is transmitted after the remote terminal establishes a sidelink with the first relay terminal.

[0011] Also, according to at least one embodiment of the present disclosure, the first relay terminal transmits the information of the remote terminal to the base station when preset conditions are satisfied, and the preset conditions include The first preset condition that the remote terminal is in the RRC idle state or the inactive state, the first relay terminal is in the RRC connected state, and no common control resource set (CORESET) and / or common search space is configured in the first relay terminal, The second preset condition that the first relay terminal receives the first Uu RRC message sent from the remote terminal via the sidelink, At least one of the third preset condition that the first relay terminal detects that the radio link with the remote terminal is disconnected is included.

[0012] Also, according to at least one embodiment of the present disclosure, when the second preset condition is satisfied, after the first relay terminal caches the first Uu RRC message and transmits information of the remote terminal to the base station, the method The first relay terminal receives and stores the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier transmitted from the base station, where the local relay identifier is identification information for identifying the remote terminal on the Uu interface between the first relay terminal and the base station assigned by the base station. And / or The first relay terminal further receives the Uu interface configuration information of the remote terminal transmitted from the base station, where the Uu interface configuration information includes configuration information of a signaling radio bearer (SRB) and / or a data radio bearer (DRB), and executes the configuration of the Uu interface according to the Uu interface configuration information of the remote terminal.

[0013] Also, according to at least one embodiment of the present disclosure, executing the above-mentioned configuration of the Uu interface Configuring an entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, the radio link control (RLC) layer, and the media access control (MAC) layer.

[0014] Also, according to at least one embodiment of the present disclosure, The first relay terminal further includes transmitting the local relay identifier corresponding to the remote terminal to the base station after adding it to the adaptation layer header of the first Uu RRC message.

[0015] Also, according to at least one embodiment of the present disclosure, The first relay terminal receives a first Uu RRC message transmitted from the base station, and according to the correspondence between the PC5 interface identifier of the remote terminal stored locally and the local relay identifier, and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, determines a first remote terminal corresponding to the first local relay identifier, and further includes transmitting the first Uu RRC message to the first remote terminal.

[0016] Also, according to at least one embodiment of the present disclosure, When the first relay terminal detects that the radio link with the remote terminal is disconnected, the first relay terminal further includes transmitting indication information for indicating that the radio link between the remote terminal and the first relay terminal is disconnected to the base station.

[0017] According to another aspect of the present disclosure, at least one embodiment is a method for receiving remote terminal information, including: The base station receives information of the remote terminal transmitted from the first relay terminal, where 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. The base station, according to the information of the remote terminal, allocates a local relay identifier for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, determines a first correspondence relationship among the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmits 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 transmits Uu interface configuration information including configuration information of SRB and / or DRB, which is the Uu interface configuration information of the remote terminal, to the first relay terminal; and includes executing at least one of the processes of determining a paging transmission method of the remote terminal.

[0018] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal, paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is necessary, information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and further includes at least one of the connection status of the sidelink of the remote terminal.

[0019] Also, according to at least one embodiment of the present disclosure, The base station receives the second Uu RRC message of the remote terminal transmitted from the first relay terminal, determines a Uu interface identifier of a second remote terminal corresponding to a second local relay identifier according to the first correspondence relationship stored locally, which is carried in an adaptation layer header of the second Uu RRC message, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal. And / or When the base station transmits a third Uu RRC message of a third remote terminal to the first relay terminal, it further includes determining a local relay identifier corresponding to the third remote terminal according to the first correspondence relationship stored locally, adding the local relay identifier to an adaptation layer header of the third Uu RRC message, and then transmitting the third Uu RRC message to the first relay terminal.

[0020] Also, according to at least one embodiment of the present disclosure, the paging transmission method includes a first transmission method in which the base station transmits a paging message of the remote terminal at a paging opportunity of the remote terminal via a paging channel, and a second transmission method in which the base station transmits a paging message of the remote terminal to a relay terminal via dedicated signaling and transfers the paging message to the remote terminal via the relay terminal, and one or more of the methods are included.

[0021] Also, according to at least one embodiment of the present disclosure, the process of determining the paging transmission method of the above-mentioned remote terminal is when the information of the remote terminal indicates that the sidelink of the remote terminal is disconnected and the information of the remote terminal transmitted from other relay terminals other than the first relay terminal has not been received, determining that the paging transmission method of the remote terminal is the first transmission method. When a common CORESET and / or a common search space are not configured on the active bandwidth part (BWP) of the first relay terminal, determining whether the paging transmission method of the remote terminal is the second transmission method or a combination of the first transmission method and the second transmission method; When a common CORESET and / or a common search space are configured on the active BWP of the first relay terminal, determining that the paging transmission method of the remote terminal is the first transmission method, including at least one of the above.

[0022] Also, according to at least one embodiment of the present disclosure, The base station receives instruction information transmitted from the first relay terminal for instructing that the radio link between the fourth remote terminal and the first relay terminal has been disconnected; The base station releases the related configuration of the fourth remote terminal according to the instruction information, deletes the local relay identifier assigned to the fourth remote terminal, deletes the second correspondence relationship between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and determines the paging transmission method of the fourth remote terminal based on the information of the fourth remote terminal reported from each received relay terminal.

[0023] According to another aspect of the present disclosure, at least one embodiment is applied to a first relay terminal, and is a transmission device for remote terminal information including a memory, a transceiver, and a processor, The memory is for storing a computer program; The transceiver is for transmitting and receiving data under the control of the processor; The processor reads the computer program in the memory, An apparatus is provided for performing an operation of transmitting information of a remote terminal to a base station, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information including a user-to-network (Uu) interface identifier and a sidelink (PC5) interface identifier of the remote terminal.

[0024] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal, and paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is necessary, and information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and at least one of information on the connection status of the sidelink of the remote terminal is further included.

[0025] Also, according to at least one embodiment of the present disclosure, the processor is also for performing an operation of receiving the information of the remote terminal via a sidelink with the remote terminal before transmitting the information of the remote terminal to the base station by reading a computer program in the memory. Also, according to at least one embodiment of the present disclosure, the information of the remote terminal is transmitted after the remote terminal establishes a sidelink with the first relay terminal.

[0026] Also, according to at least one embodiment of the present disclosure, the processor is also for performing an operation of transmitting the information of the remote terminal to the base station when a preset condition is satisfied by reading a computer program in the memory, and the preset condition includes

[0027] Also, according to at least one embodiment of the present disclosure, the processor is also for performing an operation of transmitting the information of the remote terminal to the base station when a preset condition is satisfied by reading a computer program in the memory, and the preset condition includes Also, according to at least one embodiment of the present disclosure, the information of the remote terminal is transmitted after the remote terminal establishes a sidelink with the first relay terminal. The first preset condition that the remote terminal is in the RRC idle state or the inactive state, the first relay terminal is in the RRC connected state, and no common control resource set (CORESET) and / or common search space is configured in the first relay terminal, The second preset condition that the first relay terminal receives the first Uu RRC message sent from the remote terminal via the sidelink, Among the third preset condition that the first relay terminal detects that the radio link with the remote terminal is disconnected, at least one is included.

[0028] Also, according to at least one embodiment of the present disclosure, the processor reads the computer program in the memory, When the second preset condition is satisfied, cache the first Uu RRC message, and after sending the information of the remote terminal to the base station, Receive and save the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier sent from the base station, where the local relay identifier is the identification information assigned by the base station for identifying the remote terminal on the Uu interface between the first relay terminal and the base station. And / or, Receive the Uu interface configuration information of the remote terminal sent from the base station, where the Uu interface configuration information includes the configuration information of the SRB and / or DRB, and perform an operation for executing the configuration of the Uu interface according to the Uu interface configuration information of the remote terminal.

[0029] Also, according to at least one embodiment of the present disclosure, executing the above-mentioned configuration of the Uu interface Includes configuring an entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, the RLC layer, and the MAC layer.

[0030] Also, according to at least one embodiment of the present disclosure, the processor reads the computer program in the memory, and is also for performing an operation of adding a local relay identifier corresponding to the remote terminal into an adaptation layer header of the first Uu RRC message and then transmitting the message to the base station.

[0031] Also, according to at least one embodiment of the present disclosure, the processor reads the computer program in the memory, receives a first Uu RRC message transmitted from the base station to the remote terminal, determines 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 stored locally and the local relay identifier, and a first local relay identifier carried in the adaptation layer header of the first Uu RRC message, and is also for performing an operation of transmitting the first Uu RRC message to the first remote terminal.

[0032] Also, according to at least one embodiment of the present disclosure, the processor reads the computer program in the memory, and is also for performing an operation of detecting that a radio link with the remote terminal is disconnected, and transmitting, to the base station, indication information for indicating that a radio link between the remote terminal and a first relay terminal is disconnected.

[0033] According to another aspect of the present disclosure, at least one embodiment provides a first relay terminal, including a transmission unit for transmitting, to the base station, information of the remote terminal, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes a user-to-network (Uu) interface identifier and / or a sidelink (PC5) interface identifier of the remote terminal.

[0034] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal, and paging reception requirement information of the remote terminal, which is paging reception requirement information for instructing whether paging transfer by the relay terminal is necessary, and information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and at least one of the sidelink connection status of the remote terminal is further included.

[0035] Also, according to at least one embodiment of the present disclosure, the first relay terminal further includes a first receiving unit for receiving the information of the remote terminal via a sidelink with the remote terminal before transmitting the information of the remote terminal to the base station.

[0036] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal is transmitted after the remote terminal has established a sidelink with the first relay terminal.

[0037] Also, according to at least one embodiment of the present disclosure, when preset conditions are satisfied, the first relay terminal transmits the information of the remote terminal to the base station, and the preset conditions include a first preset condition that the remote terminal is in the RRC idle state or the non-active state, the first relay terminal is in the RRC connected state, and no common control resource set (CORESET) and / or common search space is configured for the first relay terminal, and a second preset condition that the first relay terminal has received the first Uu RRC message transmitted from the remote terminal from the sidelink, and At least one of the third preset conditions including that the first relay terminal detects that the wireless link with the remote terminal is disconnected is included.

[0038] Also, according to at least one embodiment of the present disclosure, the first relay terminal When the second preset condition is satisfied, a cache unit for caching the first Uu RRC message, and A correspondence relationship between the PC5 interface identifier of the remote terminal and the local relay identifier transmitted from the base station, where the local relay identifier is identification information assigned by the base station for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, receives and stores the correspondence relationship, and / or receives the Uu interface configuration information of the remote terminal transmitted from the base station, where the Uu interface configuration information includes configuration information of SRB and / or DRB, and further includes a second receiving unit for executing the configuration of the Uu interface according to the Uu interface configuration information of the remote terminal.

[0039] Also, according to at least one embodiment of the present disclosure, the second receiving unit is also for configuring 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.

[0040] Also, according to at least one embodiment of the present disclosure, the first relay terminal Further includes a transmission processing unit for adding the local relay identifier corresponding to the remote terminal into the adaptation layer header of the first Uu RRC message and then transmitting it to the base station.

[0041] Also, according to at least one embodiment of the present disclosure, the first relay terminal Receive the first Uu RRC message transmitted from the base station, and according to the correspondence relationship between the PC5 interface identifier of the remote terminal stored locally and the local relay identifier, and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, determine the first remote terminal corresponding to the first local relay identifier, and further include a reception processing unit for transmitting the first Uu RRC message to the first remote terminal.

[0042] Also, according to at least one embodiment of the present disclosure, the first relay terminal When detecting that the radio link between the first relay terminal and the remote terminal is disconnected, further include a link disconnection processing unit for transmitting, to the base station, instruction information for instructing that the radio link between the remote terminal and the first relay terminal is disconnected.

[0043] According to another aspect of the present disclosure, at least one embodiment is applied to a base station, and is a receiving device for remote terminal information including a memory, a transceiver, and a processor, The memory is for storing a computer program, The transceiver is for transmitting and receiving data under the control of the processor, The processor reads the computer program in the memory, Receive information of the remote terminal transmitted from the first relay terminal, where the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes an operation of receiving information including the Uu interface identifier and the PC5 interface identifier of the remote terminal, and According to the information of the remote terminal, Assign 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 among the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmit 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 transmit Uu interface configuration information including configuration information of SRB and / or DRB, which is the Uu interface configuration information of the remote terminal, to the first relay terminal; It provides a device for performing an operation of executing at least one of the processes of determining the paging transmission method of the remote terminal.

[0044] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal; paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is required; information on whether the first relay terminal has received the Uu RRC message of the remote terminal; and further includes at least one of the connection status of the sidelink of the remote terminal.

[0045] Also, according to at least one embodiment of the present disclosure, the processor reads the computer program in the memory, Receiving the second Uu RRC message of the remote terminal transmitted from 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 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 transmitting a third Uu RRC message of a third remote terminal to the first relay terminal, according to the first correspondence relationship stored locally, determining a local relay identifier corresponding to the third remote terminal and adding it into an adaptation layer header of the third Uu RRC message, and then performing an operation of transmitting it to the first relay terminal.

[0046] Also, according to at least one embodiment of the present disclosure, the paging transmission method includes a first transmission method in which a base station transmits a paging message of a remote terminal at a paging opportunity of the remote terminal via a paging channel; a second transmission method in which a base station transmits a paging message of a remote terminal to a relay terminal via dedicated signaling and transfers it to the remote terminal via the relay terminal; One or more of a third transmission method of combining the first transmission method and the second transmission method are included.

[0047] Also, according to at least one embodiment of the present disclosure, the process of determining the paging transmission method of the remote terminal described above is when the information of the remote terminal indicates that the sidelink of the remote terminal is disconnected and the information of the remote terminal transmitted from other relay terminals other than the first relay terminal has not been received, determining that the paging transmission method of the remote terminal is the first transmission method; When a common CORESET and / or a common search space are not configured on the active BWP of the first relay terminal, determining that the paging transmission method of the remote terminal is the second transmission method or the third transmission method; When a common CORESET and / or a common search space are configured on the active BWP of the first relay terminal, determining that the paging transmission method of the remote terminal is the first transmission method, including at least one of them.

[0048] Also, according to at least one embodiment of the present disclosure, the processor reads the computer program in the memory, receiving instruction information transmitted from the first relay terminal for instructing that the radio link between the fourth remote terminal and the first relay terminal is disconnected; releasing the related configuration of the fourth remote terminal according to the instruction information, deleting the local relay identifier assigned to the fourth remote terminal, deleting the second correspondence relationship between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and based on the information of the fourth remote terminal reported from each received relay terminal, determining the paging transmission method of the fourth remote terminal.

[0049] According to another aspect of the present disclosure, at least one embodiment is a base station, a receiving unit for receiving information of a remote terminal transmitted from a first relay terminal, where 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; according to the information of the remote terminal, Assign 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 among 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 including configuration information of SRB and / or DRB, which is the Uu interface configuration information of the remote terminal, to the first relay terminal; A base station is provided, which includes a processing unit for executing at least one of the processes of determining the paging transmission method of the remote terminal.

[0050] Also, according to at least one embodiment of the present disclosure, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal; paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is necessary; information on whether the first relay terminal has received the Uu RRC message of the remote terminal; and further includes at least one of the connection status of the sidelink of the remote terminal.

[0051] Also, according to at least one embodiment of the present disclosure, the base station Receive the second Uu RRC message of the remote terminal sent from the first relay terminal, determine the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier according to the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first correspondence relationship stored locally, and process the second Uu RRC message based on the Uu interface identifier of the second remote terminal, and / or, When sending the third Uu RRC message of the third remote terminal to the first relay terminal, further include an interaction processing unit for determining the local relay identifier corresponding to the third remote terminal according to the first correspondence relationship stored locally, adding it to the adaptation layer header of the third Uu RRC message, and then sending it to the first relay terminal.

[0052] Also, according to at least one embodiment of the present disclosure, the paging transmission method includes a first transmission method in which the base station sends a paging message of the remote terminal at the paging opportunity of the remote terminal via a paging channel, and a second transmission method in which the base station sends a paging message of the remote terminal to the relay terminal via dedicated signaling and transfers it to the remote terminal via the relay terminal, and one or more of these methods are included.

[0053] Also, according to at least one embodiment of the present disclosure, the processing unit When the information of the remote terminal indicates that the sidelink of the remote terminal has been disconnected and the information of the remote terminal sent from other relay terminals other than the first relay terminal has not been received, determine that the paging transmission method of the remote terminal is the first transmission method, When a common CORESET and / or a common search space are not configured on the active BWP of the first relay terminal, determining whether the paging transmission method of the remote terminal is the second transmission method or a combination of the first transmission method and the second transmission method; When a common CORESET and / or a common search space are configured on the active BWP of the first relay terminal, determining that the paging transmission method of the remote terminal is the first transmission method, at least one of which is also for determining the paging transmission method of the remote terminal.

[0054] Also, according to at least one embodiment of the present disclosure, the base station receives instruction information transmitted from the first relay terminal for instructing that the radio link between the fourth remote terminal and the first relay terminal has been disconnected, releases the related configuration of the fourth remote terminal according to the instruction information, deletes the local relay identifier assigned to the fourth remote terminal, deletes the second correspondence between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and further includes a link disconnection processing unit for determining the paging transmission method of the fourth remote terminal based on the information of the fourth remote terminal reported from each received relay terminal.

[0055] According to another aspect of the present disclosure, at least one embodiment provides a processor-readable storage medium storing a computer program, where the computer program is for causing the processor to execute the method described above.

[0056] According to another aspect of the present disclosure, at least one embodiment provides a chip including a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is for operating a program or an instruction to implement the method described above.

[0057] According to another aspect of the present disclosure, at least one embodiment provides a computer program product stored in a non-volatile memory medium, the computer program product being executed by at least one processor so that the method described above is realized.

Advantages of the Invention

[0058] Compared with the related art, the method for transmitting remote terminal information, the receiving method and the device according to the embodiments of the present disclosure can realize notifying the base station of the information of the remote terminal connected to the relay terminal, and can assist the base station in assigning a local relay identifier to the remote terminal based on the above information. Therefore, when the relay terminal transmits the initial signaling of the remote terminal, the problems that the remote terminal does not have a local relay identifier and the entity of each layer of the Uu SRB corresponding to the remote terminal is not established can be avoided. In addition, since the above information can also be used to determine the paging method of the remote terminal by the base station, the problem of data transmission and reception caused by the relay terminal monitoring the paging opportunity (PO) of the remote terminal can be avoided.

[0059] By reading the detailed description of the following preferred embodiments, various other advantages and merits will become apparent to those skilled in the art. The drawings are only for showing the preferred embodiments and should not be regarded as a limitation to the present disclosure. Further, throughout the drawings, the same members are denoted by the same reference numerals.

Brief Description of the Drawings

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Embodiments for Carrying Out the Invention

[0061] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and is not limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0062] The terms "first," "second," etc. in the description and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Data used in this way are interchangeable with each other in appropriate circumstances, whereby it should be understood that the embodiments of this application described herein can be implemented in an order other than, for example, the order illustrated or described herein. Also, the terms "comprising" and "having," and any variants thereof, cover non-exclusive inclusion. For example, a procedure, method, system, product, or apparatus comprising a series of steps or units is not limited to only including these steps or units explicitly listed, and may include other steps or units not explicitly listed, or other steps or units inherent to these procedures, methods, products, or apparatuses. "And / or" in the description and claims means representing at least one of the objects before and after it.

[0063] The following description provides examples and does not limit the scope, applicability, or configuration described in the claims. Changes can be made to the functions and arrangements of the described elements without departing from the spirit and scope of the present disclosure. Various examples can omit, substitute, or add various procedures or components as needed. For example, the described method can be executed in an order different from that described, and it is also possible to add, omit, or combine various steps. Furthermore, features described with reference to specific examples can be combined in other examples.

[0064] In this specification, the network-side device may specifically be a base station. The base station may be a base station of the fifth-generation mobile communication technology (5G) and subsequent versions, such as the next Generation Node B (gNB), 5G (New Radio, NR) Narrow Band (NB), etc., or the base station may be a base station in other communication systems, such as an evolved Node B (eNB), a Wireless Local Area Network (WLAN) access point, or other access points, etc. Also, the base station may be referred to as a Node B, an evolved Node B, an access point, a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a B node, an evolved Node B (eNB), a Home Node B, a Home evolved Node B, a WLAN access point, a Wireless Fidelity (WiFi (registered trademark)) node, or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. Also, hereinafter, the base station is also used when referring to the network-side device.

[0065] As described in the Background Art, in order to expand the coverage of a network, in the related art, a UE-to-Network Relay mode as shown in FIG. 3 has been introduced. The remote terminal may be in the RRC IDLE state, the RRC INACTIVE state, or the RRC CONNECTED state, and the relay terminal may also be in the RRC IDLE, RRC INACTIVE, or RRC CONNECTED state. However, when the remote terminal is in the RRC CONNECTED state, the relay terminal must also be in the RRC CONNECTED state. For a remote terminal in the RRC IDLE or RRC INACTIVE state, assistance from the relay terminal is required to receive paging from the network to the remote terminal. At this time, if the relay terminal is in the RRC CONNECTED state, if there is no common control resource set (CORESET) or common search space configured in the bandwidth part (BWP) of the relay terminal, BWP switching needs to be performed to switch to the BWP having the common CORESET and the common search space to receive the paging of the remote terminal, which may affect the data transmission and reception of the relay terminal.

[0066] The relay terminal can simultaneously relay signaling and data for a plurality of remote terminals. At the Uu interface, since the relay terminal needs to distinguish which remote terminal each packet is from or to, for each remote terminal, the relay terminal and the base station need to allocate one local U2N relay identifier for the base station to identify one remote terminal at the Uu interface. The local U2N relay identifier is allocated by the base station. However, if the base station allocates the local U2N relay identifier for the remote terminal after receiving the first Uu RRC message of the uplink of the remote terminal, the relay terminal cannot use the allocated local U2N relay identifier when transmitting the first Uu RRC message of the remote terminal to the base station. And when the relay terminal transmits the first Uu RRC message of the remote terminal, if the Uu entities of each layer (including but not limited to the entities of the adaptation layer, the Radio Link Control (RLC) layer, and the Media Access Control (MAC) layer) for the remote terminal are not established, the relay terminal can only transmit the initial Uu signaling of the remote terminal using a fixed configuration via the common channel, making it difficult to ensure the reliability and delay of the transmission.

[0067] To solve at least one of the above problems, embodiments of the present disclosure provide a method for transmitting and receiving remote terminal information. A relay terminal reports information of a remote terminal (remote UE) connected thereto to a network via dedicated signaling, and the network, based on this information, assigns a local relay identifier (also referred to as a local U2N relay identifier in this specification) for the remote terminal, and configures a Signalling Radio Bearer (SRB) and / or a Data Radio Bearer (DRB) of the remote terminal to notify the relay terminal, or determines a paging transmission method of the remote terminal.

[0068] Referring to FIG. 4, when the method for transmitting remote terminal information according to an embodiment of the present disclosure is applied to the relay terminal side, it includes the following step 41.

[0069] Step 41 is that a first relay terminal transmits information of a remote terminal to a base station, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information including a Uu interface identifier and / or a PC5 interface identifier of the remote terminal.

[0070] Here, the first relay terminal may transmit information of one or more remote terminals connected to itself to the base station. The Uu interface identifier information of the remote terminal may specifically be, for example, the 5G S-Temporary Mobile Subscription Identifier (5G-S-TMSI), Inactive RNTI (I-RNTI), or Cell RNTI (C-RNTI) of the remote terminal. The PC5 interface identifier of the remote terminal may specifically be the Layer-2 ID of the remote terminal. The remote terminal may be directly connected to the first relay terminal or may be connected to the first relay terminal via another relay terminal. The first relay terminal may be a relay terminal directly connected to the base station.

[0071] Through the above steps, the relay terminal in the embodiment of the present disclosure reports information of the remote terminals connected to it to the base station, so that the base station can, based on this information, assign a local relay identifier for the remote terminal or determine the paging transmission method for the remote terminal. Therefore, when the relay terminal transmits the initial signaling of the remote terminal, problems such as the absence of a local relay identifier for the remote terminal and the non-establishment of each layer entity of the Uu SRB corresponding to the remote terminal can be avoided, and problems with data transmission and reception caused by the relay terminal monitoring the PO of the remote terminal can also be avoided.

[0072] In the embodiment of the present disclosure, the information of the remote terminal includes 1) For example, the RRC status of the remote terminal such as the RRC idle state, connected state, inactive state, etc., and 2) The paging reception requirement information of the remote terminal, which is the paging reception requirement information for indicating whether paging transfer by the relay terminal is necessary, and 3) Information on whether the first relay terminal has received a Uu RRC message of the remote terminal, which includes a Uu RRC message such as an RRCSetupRequest, RRCResumeRequest, RRCReestablishmentRequest, or RRCReconfigurationComplete message, and 4) At least one of the following information may be further included: the sidelink connection status of the remote terminal, that is, information on whether there is a relay connection between the relay terminal and the remote terminal, such as whether the connection is normal or the connection has been disconnected.

[0073] Specifically, the information of the remote terminal may be the one sent by the remote terminal after establishing a sidelink with the first relay terminal. For example, after establishing a link (Sidelink, SL) unicast connection with the first relay terminal, the remote terminal sends the information of this remote terminal to the relay terminal connected to itself via PC5-S signaling, PC5-RRC signaling, or an SL Media Access Control Control Element (MAC CE). Before step 41, the first relay terminal receives the information of the remote terminal via the sidelink with the remote terminal, and then, in step 41, the first relay terminal may send the above information to the base station.

[0074] More specifically, the first remote terminal may determine whether to send the above information to the base station according to whether the preset conditions are met. The preset conditions include The first preset condition that the remote terminal is in the RRC idle state or the inactive state, the first relay terminal is in the RRC connected state, and no common CORESET and / or common search space is configured for the first relay terminal, and A second preset condition that the first relay terminal receives from the sidelink a Uu RRC message that is the first Uu RRC message transmitted from the remote terminal, such as an RRCSetupRequest, RRCResumeRequest, RRCReestablishmentRequest, or RRCReconfigurationComplete message, etc., At least one of the following is included: a third preset condition that the first relay terminal detects that the radio link with the remote terminal has been disconnected, that is, the SL unicast connection between the remote terminal and the first relay terminal has been released.

[0075] Taking the second preset condition as an example, when the second preset condition is satisfied, the first relay terminal may locally cache the first Uu RRC message transmitted from the remote terminal and transmit the information of the remote terminal to the base station in step 41. The base station may perform processes such as assigning a local relay identifier for the remote terminal according to the received information of the remote terminal. Thus, thereafter, the first relay terminal The process of receiving and storing the correspondence relationship between the PC5 interface identifier of the remote terminal transmitted from the base station and the local relay identifier by the first relay terminal, where the local relay identifier is the identification information for identifying the remote terminal on the Uu interface between the first relay terminal and the base station assigned by the base station, And / or The first relay terminal receives the Uu interface configuration information of the remote terminal transmitted from the base station, which includes the configuration information of SRB and / or DRB, and may further perform the process of configuring the Uu interface according to the Uu interface configuration information of the remote terminal.

[0076] Here, for the first relay terminal to execute the configuration of the Uu interface, specifically, it may include configuring an entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, the RLC layer, and the MAC layer.

[0077] Through the above steps, the first relay terminal can obtain a local relay identifier for identifying the terminal at the Uu interface between the first relay terminal and the base station, which is assigned by the base station for the remote terminal. The first relay terminal determines the local relay identifier of the remote terminal according to the PC5 interface identifier of the remote terminal and the corresponding relationship stored locally. Next, after adding the local relay identifier corresponding to the remote terminal into the adaptation layer header of the initial Uu RRC message cached locally, it can also be transmitted to the base station. Therefore, the reliability of Uu RRC message transmission can be guaranteed.

[0078] After the first relay terminal obtains the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier, the first relay terminal can transfer messages for the remote terminal according to the correspondence. For example, the first relay terminal receives a first Uu RRC message transmitted from a base station, and according to 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, determines a first remote terminal corresponding to the first local relay identifier, and transmits the first Uu RRC message to the first remote terminal. Further, for example, the first relay terminal receives a second Uu RRC message transmitted from the first remote terminal from the sidelink, and according to the correspondence between the PC5 interface identifier of the remote terminal and the local relay identifier stored locally and the PC5 interface identifier of the first remote terminal, determines a first local relay identifier corresponding to the first remote terminal. Next, after adding the first local relay identifier into the adaptation layer header of the second Uu RRC message, it transmits the message to the base station.

[0079] In an embodiment of the present disclosure, the relay terminal may transmit update information to the base station according to the connection status of the remote terminal. For example, when the first relay terminal detects that the radio link between the first relay terminal and the remote terminal is disconnected, it transmits instruction information for instructing that the radio link between the remote terminal and the first relay terminal is disconnected to the base station. The base station may delete the configuration related to the remote terminal according to the instruction information.

[0080] It should also be noted that the present disclosure is applicable to a multi-hop relay scenario, that is, a scenario where a remote terminal accesses a network through relays by multiple relay terminals. In the case of a multi-hop relay scenario, the information of the remote terminal reported by the relay terminal may include the information of the relay terminal of each hop.

[0081] Referring to FIG. 5, when the method for receiving remote terminal information according to an embodiment of the present disclosure is applied to the base station side, it includes the following steps 51 to 52.

[0082] Step 51 is that the base station receives information of a remote terminal transmitted from a first relay terminal, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information including a Uu interface identifier and a PC5 interface identifier of the remote terminal. Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0083] Step 52 is that the base station executes at least one of the following 1) to 3) according to the information of the remote terminal. 1) Assign 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 among the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmit a second correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal to the first relay terminal. 2) Configure an entity corresponding to the Uu interface of the remote terminal, and transmit to the first relay terminal the Uu interface configuration information of the remote terminal, which includes the configuration information of the SRB and / or the Data Radio Bearer (DRB). Here, configuring an entity corresponding to the Uu interface of the remote terminal includes configuring an entity corresponding to the Uu interface in at least one of the Service Data Adaption Protocol (SDAP), Packet Data Convergence Protocol (PDCP), adaptation layer, Radio Link Control (RLC), and MAC layer. 3) Determine the paging transmission method of the remote terminal.

[0084] The paging transmission method includes a first transmission method in which the base station transmits a paging message of the remote terminal at a paging opportunity of the remote terminal via a paging channel, and a second transmission method in which the base station transmits a paging message of the remote terminal to the relay terminal via dedicated signaling and transfers it to the remote terminal via the relay terminal, and one or more of these methods are included.

[0085] In the embodiments of the present disclosure, it can be seen that the information of the remote terminal transmitted from the first relay terminal is used to cause the base station to execute at least one of the above processes based on the information of the remote terminal.

[0086] Hereinafter, several examples for determining the paging transmission method of the remote terminal are given. It should be noted that the following examples are only examples applicable to the present disclosure and are not intended to limit the present disclosure. 1) When the information of the remote terminal indicates that the sidelink of the remote terminal has been disconnected and the information of the remote terminal sent from relay terminals other than the first relay terminal has not been received, the paging transmission method of the remote terminal is determined to be the first transmission method. 2) When a common CORESET and / or a common search space are not 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 a combination of the first transmission method and the second transmission method. 3) When a common CORESET and / or a common 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 first transmission method.

[0087] Through the above steps, the base station can allocate a local relay identifier for the remote terminal according to the information of the remote terminal sent from the relay terminal, configure the Signalling Radio Bearer (SRB) and / or Data Radio Bearer (DRB) of the remote terminal and notify the relay terminal, or determine the paging transmission method of the remote terminal. Therefore, when the relay terminal transmits the initial signaling of the remote terminal, it can avoid the problems that the local relay identifier of the remote terminal is missing and the entity of each layer of the Uu SRB corresponding to the remote terminal is not established, and can also avoid the problems of data transmission and reception caused by the relay terminal monitoring the PO of the remote terminal.

[0088] In an embodiment of the present disclosure, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal, and the paging reception requirement information of the remote terminal, which is used to indicate whether paging transfer by the relay terminal is required. Information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and At least one of information on the connection status of the sidelink of the remote terminal is further included.

[0089] After allocating a local relay identifier for the remote terminal, the base station can transmit data according to the first correspondence relationship held locally. For example, the base station receives the second Uu RRC message of the remote terminal transmitted from the first relay terminal, determines the Uu interface identifier of the second remote terminal corresponding to the second local relay identifier according to the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first correspondence relationship stored locally, processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal, and / or when the base station transmits a third Uu RRC message of a third remote terminal to the first relay terminal, determines the local relay identifier corresponding to the third remote terminal according to the first correspondence relationship stored locally, adds it to the adaptation layer header of the third Uu RRC message, and then transmits it to the first relay terminal.

[0090] In an embodiment of the present disclosure, the base station may also receive, from the first relay terminal, indication information for indicating that the radio link between the fourth remote terminal and the first relay terminal has been disconnected. In this case, 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, deletes the second correspondence relationship between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and determines the paging transmission method of the fourth remote terminal based on the information of the fourth remote terminal reported from each received relay terminal.

[0091] As can be seen from the above description, according to the embodiments of the present disclosure, in a relay scenario, the relay terminal notifies the base station of the information of the remote terminal connected to itself, so that the base station can assign a local relay identifier (local U2N relay identifier) for the remote terminal that wants to enter RRC CONNECTED, avoiding the problem that the local U2N relay identifier is missing in the initial signaling of the remote terminal. In addition, since the Uu SRB configuration of the remote terminal can be performed on the relay terminal, the reliability of the signaling transmission of the remote terminal is improved. Or, since the base station can determine the paging method of the remote terminal, the problem of data transmission and reception caused by the relay terminal monitoring the PO of the remote terminal is avoided.

[0092] Hereinafter, through several specific interaction examples, the above method of the embodiments of the present disclosure will be described.

[0093] Example 1 The remote UE1 accesses the base station 1 via the relay UE1. The remote UE1 starts an RRC establishment request. The base station assigns a local relay identifier (i.e., local U2N relay identifier) for the remote UE1 and transmits the Uu SRB configuration of the remote UE1 to the relay UE1, and the connection of the remote UE1 RRC is successfully established.

[0094] The relay UE1 in the initial RRC CONNECTED state camps on the cell 1 controlled by the base station 1. As shown in FIG. 6, this example includes the following steps 61 to 69.

[0095] Step 61 is that the remote UE1 discovers the relay UE1 through a discovery procedure and selects it as its U2N relay.

[0096] Step 62 is that the remote UE1 establishes a unicast connection of the SL with the relay UE1.

[0097] Step 63 is that the remote UE1 sends its Uu interface identifier information (5G-S-TMSI of the remote UE), PC5 interface identifier information of the remote UE (Layer-2 ID of the remote UE), RRC status of the remote UE (RRC IDLE state), and paging reception requirement information (indicating that the remote UE does not require paging transfer by the relay UE) to the relay UE1.

[0098] Step 64 is that the remote UE1 issues an RRC establishment request message to the base station 1 via the relay UE1.

[0099] Step 65 is that after the relay UE1 receives the RRC establishment request message sent from the remote UE1 to the base station, the relay UE1 caches the message and triggers the start of the remote UE information report by the relay UE1. The remote UE information report includes the Uu interface identifier information of the remote UE1 (5G-S-TMSI of the remote UE1), PC5 interface identifier information of the remote UE1 (Layer-2 ID of the remote UE1), RRC status of the remote UE1 (RRC IDLE state), paging reception requirement information (indicating that the remote UE1 does not require paging transfer by the relay UE1), the fact that the Uu RRC message of the remote UE1 has been received, and the relay connection status (indicating that there is a relay connection between the relay UE1 and the remote UE1). The remote UE information report may be sent via a related RRC message or a newly introduced RRC message.

[0100] In step 66, after the base station 1 receives the remote UE information report transmitted from the relay UE1, it assigns a local U2N relay identifier 1 for the remote UE1, and transmits, via signaling, the assigned local U2N relay identifier 1, the correspondence with the remote UE1, and the Uu SRB configuration of the remote UE1 to the relay UE1. Among them, the Uu SRB of the remote UE1 includes, but is not limited to, SRB0, SRB1, SRB2, and SRB3, and combinations thereof. The Uu SRB configuration of the remote UE1 includes, but is not limited to, the SDAP configuration, the PDCP configuration, the adaptation layer configuration, the RLC configuration, the MAC configuration, the logical channel configuration, and the physical layer configuration.

[0101] In step 67, after the relay UE1 receives the message of step 66, based on the configuration information, it establishes each layer entity of Uu for the remote UE (including, but not limited to, the adaptation layer, RLC, and MAC entities), and transmits the cached RRC establishment request message of the remote UE1 to the base station 1.

[0102] In step 68, the base station 1 transmits an RRC establishment message to the remote UE1 via the relay UE1.

[0103] In step 69, the remote UE1 transmits an RRC establishment completion message to the base station 1 via the relay UE1.

[0104] In any of steps 67 to 69 above, the relay UE1 is configured to perform channel mapping of the remote UE using the local U2N relay identifier.

[0105] Example 1 is similarly applicable to a scenario where the remote UE is in the RRC INACTIVE or RRC CONNECTED state. In this case, the Uu interface identifiers of remote UE1 are the I-RNTI and C-RNTI of remote UE1 respectively, and the RRC messages sent by remote UE1 are the RRC Resume Request message and the RRC Reestablishment Request message respectively.

[0106] Example 2 Remote UE1 accesses the base station 1 via relay UE1. Relay UE1 is in a connected state, and there is no common CORESET configured in the active BWP of relay UE1. Remote UE1 forwards paging via relay UE1. As shown in Figure 7, this example includes the following steps 71 to 77.

[0107] Steps 71 to 72 are the same as steps 61 to 62 in Example 1.

[0108] Step 73 is that remote UE1 sends its Uu interface identifier information (5G-S-TMSI of the remote UE), PC5 interface identifier information of the remote UE (Layer-2 ID of the remote UE), RRC status of the remote UE (RRC IDLE), and paging reception requirement information (indicating that the remote UE requires paging transfer by the relay UE) to relay UE1.

[0109] Step 74 is that after relay UE1 receives the information of remote UE1, it triggers the start of the remote UE information report by the relay UE1. 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 state), paging reception requirement information (indicating that remote UE1 requires paging transfer by relay UE1), the fact that the Uu RRC message of remote UE1 has not been received, and the relay connection status (indicating that there is a relay connection between relay UE1 and remote UE1).

[0110] Step 75 is that after the base station receives the remote UE information report of relay UE1, it knows that it is necessary to transfer paging by relay UE1 for remote UE1 and that there is no common CORESET configured in the active BWP of relay UE1, and determines that the paging transmission method of remote UE1 is transmission to relay UE1 via dedicated signaling.

[0111] Step 76 is that base station 1 transmits the paging of remote UE1 to relay UE1 using dedicated signaling.

[0112] Step 77 is that relay UE1 transfers the paging of remote UE1 via SL signaling.

[0113] Example 3 Remote UE1 accesses base station 1 via relay UE1. Relay UE1 is in the connected state. There is no common CORESET configured in the active BWP of relay UE1. Remote UE1 transfers paging via relay UE1, and the SL link between relay UE1 and remote UE1 is disconnected. As shown in Figure 8, this example includes the following steps 81 to 88.

[0114] Steps 81 to 85 are the same as steps 71 to 75 in Example 2.

[0115] Step 86 is that relay UE1 detects that the SL connection with remote UE1 has been disconnected.

[0116] Step 87 is that relay UE1 starts a remote UE information report, and 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 state), paging reception requirement information (indicating that remote UE1 does not require paging transfer by relay UE1), the fact that remote UE1 has not received a Uu RRC message, and relay status (indicating that there is no relay connection between relay UE1 and remote UE1).

[0117] Step 88 is that after the base station receives the remote UE information report transmitted from relay UE1, it determines that there is no existing paging transfer relationship between remote UE1 and relay UE1, and changes the paging transmission method of remote UE1 to the method of transmitting via the paging channel in the conventional paging opportunity of remote UE1.

[0118] Example 2 and Example 3 are also applicable to a remote UE in the RRC INACTIVE state, and the Uu interface identifier information of remote UE1 included therein is the I-RNTI of remote UE1.

[0119] Example 4 Remote UE1 accesses base station 1 via two-hop U2U relay UE1 and U2N relay UE2. Remote UE1 starts an RRC establishment request. The base station assigns a local U2N relay identifier for remote UE1, and the remote UE1 RRC is successfully established.

[0120] The U2N relay UE2 in the initial RRC CONNECTED state camps on cell 1 controlled by base station 1. As shown in FIG. 9, this example includes the following steps 91 to 99.

[0121] Steps 91 and 91a are that the remote UE1 discovers the U2U relay UE1 and the U2N relay UE2 through the discovery procedure and selects them as its U2N relay. Step 91a may already be completed before step 91.

[0122] Steps 92 and 92a are that the remote UE1 establishes a unicast connection on the SL with the U2U relay UE1, and the U2U relay UE1 establishes a unicast connection on the SL with the U2N relay UE2. Step 92a may already exist a unicast connection on the SL between the U2U relay UE1 and the U2N relay UE2 before the establishment of the SL connection between the remote UE1 and the U2U relay UE1.

[0123] Steps 93 and 93a are that the remote UE1 sends its Uu interface identifier information (5G-S-TMSI of the remote UE), the PC5 interface identifier information of the remote UE (Layer-2 ID of the remote UE), the RRC status of the remote UE (RRC IDLE state), and paging reception requirement information (indicating that the remote UE requires paging transfer by the relay UE) to the U2U relay UE1, and further the U2U relay UE1 sends them to the U2N relay UE2.

[0124] Step 94 is that the remote UE1 issues an RRC establishment request to base station 1 via the U2U relay UE1 and the U2N relay UE2.

[0125] Step 95 is that after the U2N relay UE2 receives the RRC establishment request sent from the remote UE1 to the base station, it caches the message and triggers the start of the remote UE information report by the relay UE2. The remote UE information report includes the Uu interface identifier information of the remote UE1 (5G-S-TMSI of the remote UE1), the PC5 interface identifier information of the remote UE1 (Layer-2 ID of the remote UE1), the RRC status of the remote UE1 (RRC IDLE state), the paging reception requirement information (indicating that the remote UE1 does not require paging transfer by the U2N relay UE2), the receipt of the Uu RRC message of the remote UE1, and the relay connection status (indicating that there is a relay connection between the U2N relay UE2 and the remote UE1). The remote UE information report may be a related RRC message or a newly introduced RRC message.

[0126] Step 96 is that after the base station 1 receives the remote UE information report sent from the U2N relay UE2, it assigns a local U2N relay identifier 1 for the remote UE1 and transmits, via signaling, the assigned local U2N relay identifier 1, the correspondence with the remote UE1, and the Uu SRB configuration of the remote UE1 to the U2N relay UE2. Among them, the Uu SRB of the 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 the remote UE1 includes, but is not limited to, the SDAP configuration, the PDCP configuration, the adaptation layer configuration, the RLC configuration, the MAC configuration, the logical channel configuration, and the physical layer configuration.

[0127] Step 97 is that after the U2N relay UE2 receives the message in step 96, based on the configuration information, it establishes each layer entity of Uu (including but not limited to SDAP, PDCP, adaptation layer, RLC, MAC entities) for the remote UE, and sends the cached RRC establishment request message of the remote UE1 to the base station 1.

[0128] Step 98 is that the base station 1 sends an RRC establishment message to the remote UE1 via the U2N relay UE2 and the U2U relay UE1.

[0129] Step 99 is that the remote UE1 sends an RRC establishment completion message to the base station 1 via the U2N relay UE2 and the U2U relay UE1.

[0130] In any of steps 97 to 99 above, the U2N relay UE2 is configured to perform channel mapping of the remote UE using the local U2N relay identifier.

[0131] Example 5 The remote UE1 accesses the base station 1 via the U2U relay UE1 and the U2N relay UE2. The U2N relay UE2 is in the connected state, and there is no common CORESET configured in the active BWP of the U2N relay UE2. The remote UE1 forwards paging via the U2N relay UE2. As shown in Figure 10, this example includes the following steps 101 to 107.

[0132] Steps 101, 101a, 102, and 102a are the same as 91, 91a, 92, and 92a in Example 4.

[0133] Step 103 is that the remote UE1 sends its Uu interface identifier information (5G-S-TMSI of the remote UE), PC5 interface identifier information of the remote UE (Layer-2 ID of the remote UE), RRC status of the remote UE (RRC IDLE), and paging reception requirement information (indicating that the remote UE requires paging transfer by the relay UE) to the U2U relay UE1, and the U2U relay UE1 sends the information of the remote UE1 to the U2N relay UE2.

[0134] Step 104 is that after the U2N relay UE2 receives the information of the remote UE1, it triggers the start of the remote UE information report by the U2N relay UE2. The remote UE information report includes the Uu interface identifier information of the remote UE1 (5G-S-TMSI of the remote UE1), PC5 interface identifier information of the remote UE1 (Layer-2 ID of the remote UE1), RRC status of the remote UE1 (RRC IDLE state), paging reception requirement information (indicating that the remote UE1 requires paging transfer by the U2N relay UE2), the fact that the Uu RRC message of the remote UE1 has not been received, and the relay connection status (indicating that there is a relay connection between the U2N relay UE2 and the remote UE1).

[0135] Step 105 is that after the base station receives the remote UE information report of the relay UE1, it knows that paging transfer by the U2N relay UE2 for the remote UE1 is necessary and that there is no common CORESET configured in the active BWP of the U2N relay UE2, and determines that the paging transmission method for the remote UE1 is transmission to the relay UE1 via dedicated signaling.

[0136] Step 106 is that the base station 1 sends the paging of the remote UE1 to the U2N relay UE2 using dedicated signaling.

[0137] Step 107 is that the U2N relay UE2 transfers the paging of the remote UE1 to the U2U relay UE1 via SL signaling, and further the U2U relay UE1 transmits it to the remote UE1.

[0138] So far, various methods of the embodiments of the present disclosure have been introduced. Hereinafter, an apparatus for implementing the above method will be further provided.

[0139] Referring to FIG. 11, an embodiment of the present disclosure provides a first relay terminal, which transmits information of a remote terminal to a base station, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes a transmission unit 111 for transmitting information including a user-to-network (Uu) interface identifier and / or a sidelink (PC5) interface identifier of the remote terminal.

[0140] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0141] Optionally, the information of the remote terminal further includes the radio resource control (RRC) status of the remote terminal, paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is required, information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and at least one of the sidelink connection status of the remote terminal.

[0142] Optionally, the first relay terminal further includes a first receiving unit for receiving the information of the remote terminal via a sidelink between the first relay terminal and the remote terminal before transmitting the information of the remote terminal to the base station.

[0143] Optionally, the information of the remote terminal is transmitted after the remote terminal establishes a sidelink with the first relay terminal.

[0144] Optionally, when the preset conditions are met, the first relay terminal transmits the information of the remote terminal to the base station. The preset conditions include a first preset condition that the remote terminal is in the RRC idle state or the inactive state, the first relay terminal is in the RRC connected state, and the first relay terminal does not have a configured common control resource set (CORESET) and / or a common search space, and a second preset condition that the first relay terminal receives the first Uu RRC message transmitted from the remote terminal on the sidelink, and a third preset condition that the first relay terminal detects that the radio link with the remote terminal has been disconnected, and at least one of them is included.

[0145] Optionally, the first relay terminal when the second preset condition is met, includes a cache unit for caching the first Uu RRC message, and further includes a second receiving unit that receives and stores a correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal transmitted from the base station, where the local relay identifier is identification information assigned by the base station for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, and / or receives the Uu interface configuration information of the remote terminal transmitted from the base station, where the Uu interface configuration information includes SRB and / or DRB configuration information, and executes the configuration of the Uu interface according to the Uu interface configuration information of the remote terminal.

[0146] Optionally, the second receiving unit is also for configuring, for the remote terminal, an entity corresponding to the Uu interface in at least one of the local adaptation layer, the RLC layer, and the MAC layer.

[0147] Optionally, the first relay terminal further includes a transmission processing unit for adding a local relay identifier corresponding to the remote terminal into the adaptation layer header of the first Uu RRC message and then transmitting the message to the base station.

[0148] Optionally, the first relay terminal receives a first Uu RRC message transmitted from the base station, determines a first remote terminal corresponding to the first local relay identifier according to the correspondence between the PC5 interface identifier of the remote terminal stored locally and the local relay identifier, and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, and further includes a reception processing unit for transmitting the first Uu RRC message to the first remote terminal.

[0149] Optionally, the first relay terminal further includes a link disconnection processing unit for transmitting, to the base station, indication information for indicating that the radio link between the remote terminal and the first relay terminal has been disconnected when it detects that the radio link between the remote terminal and the first relay terminal has been disconnected.

[0150] It should be noted that the devices in this embodiment are devices corresponding to the method shown in FIG. 4 above. The implementation manners in the above embodiments are all applicable to the embodiments of the devices, and the same technical effects can also be achieved. The devices according to the embodiments of the present disclosure can implement all the method steps realized by the embodiments of the above method and can also achieve the same technical effects. Here, the same parts and beneficial effects as those in the method embodiments of this embodiment will not be repeated in detail.

[0151] Referring to FIG. 12, which is a schematic diagram of the structure of a remote terminal information transmission device according to an embodiment of the present disclosure, the device is applicable to a first relay terminal. Specifically, it includes a processor 1201, a transceiver 1202, a memory 1203, a user interface 1204, and a bus interface.

[0152] In an embodiment of the present disclosure, the device further includes a program stored in the memory 1203 and operable on the processor 1201. The transceiver 1202 is for transmitting and receiving data under the control of the processor. The processor 1201 reads the computer program in the memory. The processor 1201 is for executing an operation of transmitting information of a remote terminal to a base station, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes an identifier of a user-to-network (Uu) interface and an identifier of a sidelink (PC5) interface of the remote terminal.

[0153] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0154] Optionally, the information of the remote terminal further includes the radio resource control (RRC) status of the remote terminal, paging reception requirement information of the remote terminal for indicating whether paging transfer by the relay terminal is required, information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and at least one of the connection status of the sidelink of the remote terminal.

[0155] Optionally, the processor reads the computer program in the memory. It is also for performing an operation of receiving information of the remote terminal via a sidelink with the remote terminal before transmitting the information of the remote terminal to the base station.

[0156] Optionally, the information of the remote terminal is transmitted after the remote terminal has established a sidelink with a first relay terminal.

[0157] Optionally, the processor reads a computer program in the memory, and is also for performing an operation of transmitting the information of the remote terminal to the base station when a preset condition is satisfied. The preset condition includes a first preset condition that the remote terminal is in the RRC idle state or the non-active state, the first relay terminal is in the RRC connected state, and no common control resource set (CORESET) and / or common search space is configured for the first relay terminal, a second preset condition that the first relay terminal has received the first Uu RRC message transmitted from the remote terminal from the sidelink, and at least one of a third preset condition that the first relay terminal has detected that the radio link with the remote terminal has been disconnected.

[0158] Optionally, the processor reads a computer program in the memory, caches the first Uu RRC message when the second preset condition is satisfied, and after transmitting the information of the remote terminal to the base station, receives and stores a correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal transmitted from the base station, where the local relay identifier is identification information assigned by the base station for identifying the remote terminal on the Uu interface between the first relay terminal and the base station. and / or It is also for receiving Uu interface configuration information of the remote terminal transmitted from the base station, which includes configuration information of SRB and / or DRB, and performing an operation of configuring the Uu interface according to the Uu interface configuration information of the remote terminal.

[0159] Optionally, performing the above-described configuration of the Uu interface includes configuring an entity corresponding to the Uu interface for the remote terminal in at least one of the local adaptation layer, the RLC layer, and the MAC layer.

[0160] Optionally, the processor reads the computer program in the memory and is also for performing an operation of adding a local relay identifier corresponding to the remote terminal into the adaptation layer header of the first Uu RRC message and then transmitting it to the base station.

[0161] Optionally, the processor reads the computer program in the memory receives a first Uu RRC message transmitted from the base station to the remote terminal, determines a first remote terminal corresponding to the first local relay identifier according to the correspondence between the PC5 interface identifier of the remote terminal stored locally and the local relay identifier, and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, and is also for performing an operation of transmitting the first Uu RRC message to the first remote terminal.

[0162] Optionally, the processor reads the computer program in the memory and is also for performing an operation of transmitting, to the base station, indication information for indicating that the radio link between the remote terminal and the first relay terminal has been disconnected when it detects that the radio link between the remote terminal has been disconnected.

[0163] It should be understood that in the embodiments of the present disclosure, when the computer program is executed by the processor 1201, each step of the method embodiment shown in FIG. 4 above can be realized and the same technical effects can be achieved. However, to avoid repetition, it will not be described repeatedly here.

[0164] In FIG. 12, the bus architecture may include any number of interconnected buses and bridges. Specifically, various circuits of one or more processors represented by the processor 1201 and a memory represented by the memory 1203 are connected. The bus architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits to each other. However, since these are well-known in the art, no further description will be provided in this specification. The bus interface provides an interface. The transceiver 1202 may be a plurality of elements, that is, it may include a transmitter and a receiver, and provides means for communicating with various other devices via a transmission medium. For various user devices, the user interface 1204 may be an interface capable of externally or internally connecting necessary devices. The devices to be connected include, but are not limited to, a small keyboard, a display, a speaker, a microphone, a joystick, and the like.

[0165] The processor 1201 is responsible for the management of the bus architecture and general processing, and the memory 1203 can store data used when the processor 1201 executes operations.

[0166] It should be noted that the device in this embodiment corresponds to the device corresponding to the method shown in FIG. 4 above. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can also achieve the same technical effects. In this device, the transceiver 1202, the memory 1203, and the transceiver 1202 and the processor 1201 may all be communicatively connected via a bus interface. The function of the processor 1201 may also be realized by the transceiver 1202, and the function of the transceiver 1202 may also be realized by the processor 1201. Here, it should be noted that the device according to the embodiments of the present disclosure can implement all the method steps implemented by the embodiments of the above method and can also achieve the same technical effects. However, here, the same parts and beneficial effects as those in the method embodiments of this embodiment will not be repeated in detail.

[0167] In some embodiments of the present disclosure, a computer-readable storage medium storing a program is further provided. When the program is executed by a processor, information of a remote terminal to a base station, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information for transmitting a user-to-network (Uu) interface identifier and a sidelink (PC5) interface identifier of the remote terminal is realized.

[0168] When the program is executed by a processor, all implementation methods in the method for transmitting remote terminal information shown in FIG. 4 above can be realized and the same technical effects can be achieved. However, to avoid duplication, it will not be repeated here.

[0169] Embodiments of the present disclosure are base stations shown in FIG. 13, Information of the remote terminal transmitted from the first relay terminal, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes a receiving unit 131 for receiving information including the Uu interface identifier and the PC5 interface identifier of the remote terminal, According to the information of the remote terminal, Assign 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 among the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmit 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 transmit Uu interface configuration information including configuration information of SRB and / or DRB, which is the Uu interface configuration information of the remote terminal, to the first relay terminal; A base station is provided, which includes a processing unit 132 for executing at least one of the processes of determining the paging transmission method of the remote terminal.

[0170] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0171] Optionally, the information of the remote terminal further includes The radio resource control (RRC) status of the remote terminal, Paging reception requirement information of the remote terminal, which is paging reception requirement information for indicating whether paging transfer by a relay terminal is necessary, Information on whether the first relay terminal has received the Uu RRC message of the remote terminal, And at least one of the connection status of the sidelink of the remote terminal.

[0172] Optionally, the base station receives the second Uu RRC message of the remote terminal transmitted from the first relay terminal, determines a Uu interface identifier of a second remote terminal corresponding to the second local relay identifier according to the second local relay identifier carried in the adaptation layer header of the second Uu RRC message and the first corresponding relationship stored locally, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal. And / or When transmitting a third Uu RRC message of a third remote terminal to the first relay terminal, the interaction processing unit further includes determining a local relay identifier corresponding to the third remote terminal according to the first corresponding relationship stored locally, adding the local relay identifier to the adaptation layer header of the third Uu RRC message, and then transmitting the third Uu RRC message to the first relay terminal.

[0173] Optionally, the paging transmission method includes a first transmission method in which the base station transmits a paging message of the remote terminal at a paging opportunity of the remote terminal via a paging channel, and a second transmission method in which the base station transmits a paging message of the remote terminal to the relay terminal via dedicated signaling and transfers the paging message to the remote terminal via the relay terminal, and one or more of these methods are included.

[0174] Optionally, the processing unit determines that the paging transmission method of the remote terminal is the first transmission method when the information of the remote terminal indicates that the sidelink of the remote terminal is disconnected and the information of the remote terminal transmitted from other relay terminals other than the first relay terminal has not been received. When a common CORESET and / or a common search space is not configured on the active BWP of the first relay terminal, determining whether the paging transmission method of the remote terminal is the second transmission method or a combination of the first transmission method and the second transmission method; When a common CORESET and / or a common search space is configured on the active BWP of the first relay terminal, determining that the paging transmission method of the remote terminal is the first transmission method, at least one of which is also for determining the paging transmission method of the remote terminal.

[0175] Optionally, the base station Receives indication information for indicating that the radio link between the fourth remote terminal and the first relay terminal transmitted from the first relay terminal is disconnected, releases the related configuration of the fourth remote terminal according to the indication information, deletes the local relay identifier assigned to the fourth remote terminal, and deletes the second correspondence between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and further includes a link disconnection processing unit for determining the paging transmission method of the fourth remote terminal based on the information of the fourth remote terminal reported from each received relay terminal.

[0176] It should be noted that the device in this embodiment is a device corresponding to the method shown in FIG. 5 above. The implementation methods in the above embodiments are all applicable to the embodiments of this device and can also achieve the same technical effects. Here, it should be noted that the above device according to the embodiments of the present disclosure can implement all the method steps realized by the embodiments of the above method and can also achieve the same technical effects. However, here, the same parts and beneficial effects as those in the method embodiments of this embodiment will not be repeated in detail.

[0177] Referring to FIG. 14, which is a schematic diagram of the structure of a receiving device for remote terminal information according to an embodiment of the present disclosure, the device is applied to a base station. Specifically, it includes a processor 1401, a transceiver 1402, a memory 1403, and a bus interface. In an embodiment of the present disclosure, the device further includes a program stored in the memory 1403 and operable on the processor 1401. The transceiver 1402 is for transmitting and receiving data under the control of the processor. The processor 1401 reads the computer program in the memory. Receiving information of a remote terminal transmitted from a first relay terminal, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes an operation of receiving information including a Uu interface identifier and a PC5 interface identifier of the remote terminal. According to the information of the remote terminal. Allocating a local relay identifier for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, determining a first correspondence relationship among the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmitting a second correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal to the first relay terminal. Constructing an entity corresponding to the Uu interface of the remote terminal, and transmitting Uu interface configuration information including configuration information of SRB and / or DRB, which is the Uu interface configuration information of the remote terminal, to the first relay terminal. And performing an operation of executing at least one of the processes of determining the paging transmission method of the remote terminal.

[0178] Here, the first relay terminal may be a relay terminal directly connected to the base station.

[0179] Optionally, the information of the remote terminal includes the radio resource control (RRC) status of the remote terminal, and paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is necessary, and information on whether the first relay terminal has received a Uu RRC message of the remote terminal, and at least one of the connection status of the sidelink of the remote terminal.

[0180] Optionally, the processor reads the computer program in the memory to receive the second Uu RRC message of the remote terminal sent from the first relay terminal, determine 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 first corresponding relationship stored locally, and process 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, it is also for executing an operation of determining a local relay identifier corresponding to the third remote terminal according to the first corresponding relationship stored locally, adding the local relay identifier to an adaptation layer header of the third Uu RRC message, and then sending the third Uu RRC message to the first relay terminal.

[0181] Optionally, the paging transmission method includes a first transmission method in which a base station sends a paging message of a remote terminal at a paging opportunity of the remote terminal via a paging channel, and a second transmission method in which a base station sends a paging message of a remote terminal to a relay terminal via dedicated signaling and transfers the paging message to the remote terminal via the relay terminal. Among the first transmission method, the second transmission method, and the third transmission method that combines the first and second transmission methods, one or more methods are included.

[0182] Optionally, the process of determining the paging transmission method of the remote terminal described above is When the information of the remote terminal indicates that the sidelink of the remote terminal has been disconnected and the information of the remote terminal transmitted from a relay terminal other than the first relay terminal has not been received, determining that the paging transmission method of the remote terminal is the first transmission method; When a common CORESET and / or a common search space are not configured on the active BWP of the first relay terminal, determining that the paging transmission method of the remote terminal is the second transmission method or the third transmission method; When a common CORESET and / or a common search space are configured on the active BWP of the first relay terminal, including at least one of determining that the paging transmission method of the remote terminal is the first transmission method.

[0183] Optionally, the processor reads the computer program in the memory to receive the indication information transmitted from the first relay terminal for indicating that the wireless link between the fourth remote terminal and the first relay terminal has been disconnected; and according to the indication information, release the related configuration of the fourth remote terminal, delete the local relay identifier assigned to the fourth remote terminal, delete the second correspondence relationship between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and determine the paging transmission method of the fourth remote terminal based on the information of the fourth remote terminal reported from each received relay terminal.

[0184] It should be understood that in the embodiments of the present disclosure, when the computer program is executed by the processor 1401, each step of the method embodiment shown in FIG. 5 can be realized and the same technical effects can be achieved. However, to avoid repetition, it will not be described repeatedly here.

[0185] In FIG. 14, the bus architecture may include any number of interconnected buses and bridges. Specifically, various circuits of one or more processors represented by the processor 1401 and a memory represented by the memory 1403 are connected. The bus architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits to each other. However, since these are known in the art, no further description will be provided in this specification. The bus interface provides an interface. The transceiver 1402 may be a plurality of elements, that is, it may include a transmitter and a receiver, and provides means for communicating with various other devices via a transmission medium.

[0186] The processor 1401 is responsible for the management of the bus architecture and general processing, and the memory 1403 can store data used when the processor 1401 executes operations.

[0187] It should be noted that the terminal in this embodiment is a device corresponding to the method shown in FIG. 5 above. The implementation methods in the above embodiments are all applicable to the embodiments of the terminal and can also achieve the same technical effects. In this device, the transceiver 1402, the memory 1403, and the transceiver 1402 and the processor 1401 may all be communicatively connected via a bus interface. The function of the processor 1401 may also be realized by the transceiver 1402, and the function of the transceiver 1402 may also be realized by the processor 1401. Here, it should be noted that the device according to the embodiments of the present disclosure can implement all the method steps realized by the embodiments of the above method and can also achieve the same technical effects. However, here, the same parts and beneficial effects as those in the method embodiments of this embodiment will not be repeated in detail.

[0188] In some embodiments of the present disclosure, a computer-readable storage medium storing a program is further provided. When the program is executed by a processor, receiving information of a remote terminal transmitted from a first relay terminal, where the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes information including a Uu interface identifier and a PC5 interface identifier of the remote terminal; according to the information of the remote terminal, allocating a local relay identifier for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, determining a first correspondence relationship between the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmitting a second correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal to the first relay terminal; constructing an entity corresponding to the Uu interface of the remote terminal, and transmitting Uu interface configuration information including configuration information of SRB and / or DRB, which is the Uu interface configuration information of the remote terminal, to the first relay terminal; Among the processes for determining the paging transmission method of the remote terminal, a step of executing at least one of the processes is realized.

[0189] When the program is executed by a processor, all implementation methods in the method for receiving remote terminal information applied to the base station can be realized, and the same technical effects can be achieved. However, to avoid duplication, it will not be repeatedly described here.

[0190] A person skilled in the art can notice that the units and algorithm steps in each example described in combination with the embodiments disclosed in this specification can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented by hardware or software depends on the specific application of the technical aspect and the design constraint requirements. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation forms should not be regarded as outside the scope of this disclosure.

[0191] A person skilled in the art can clearly understand that for the sake of convenience and brevity of description, the specific operation procedures of the systems, devices, and units described above can refer to the corresponding procedures in the above method embodiments, and will not be repeatedly described here.

[0192] It should be understood that in the embodiments according to the present application, the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a division in terms of logical functions, and there may be other division methods in actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not implemented. Furthermore, the disclosed or described mutual coupling, direct coupling, or communication connection may be implemented using some interfaces. The indirect coupling or communication connection between devices or units may be in an electronic form, a mechanical form, or other forms.

[0193] The unit described as a separate component may or may not be physically separated. The components listed as units may or may not be physical units, may be located in the same place, or may be distributed among multiple network units. To achieve the objectives of the technical aspects according to this embodiment, some or all of the units may be selected according to actual needs.

[0194] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, each unit may physically exist alone, and furthermore, two or more units may be integrated into one unit.

[0195] The above functions may be implemented in the form of software functional units. When sold or used as an independent product, they may be stored in a computer-readable storage medium. Based on such an understanding, the essential part of the technical aspects of the present disclosure, or the part that contributes to the related technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or some of the steps in the methods described in each embodiment of the present disclosure. The above-mentioned storage medium includes any medium that can store program codes, such as a USB flash drive, a portable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0196] It should be noted that the above division of each module is only a division in terms of logical functions. It should be understood that in actual implementation, all or part of the modules may be integrated into one physical entity or physically separated. And these modules may all be realized in the form of software called by processing elements, or all be realized by hardware. Also, some modules may be realized in the form of software called by processing elements, while some other modules may be realized by hardware. For example, the determination module may be an independently provided processing element or may be realized by integration into a certain chip of the above device. Furthermore, the determination module may be stored in the memory of the above device in the form of program code and be called by a certain processing element of the above device to execute the functions of the above determination module. The realization of other modules is the same as that of the determination module. Moreover, all or part of these modules may be integrated or realized individually. The processing elements described in this specification may be integrated circuits having signal processing capabilities. When realized, each step of the above method or each of the above modules may be implemented by using the integrated logic circuit of the hardware in the processor element or by using instructions in the form of software.

[0197] For example, each module, unit, sub-unit or sub-module may be configured as one or more integrated circuits for implementing the above method, such as one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs). As another example, when a certain module described above is realized in a form that a processing element calls program code, the processing element may be a general-purpose processor such as a central processing unit (CPU), or another processor capable of calling program code. As a further example, these modules may be integrated together or realized in the form of a system-on-a-chip (SOC).

[0198] The terms "first", "second", etc. in the description and claims of the present disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Data used in this way are interchangeable with each other in appropriate situations, so that it should be understood that the embodiments of the present application described in this specification can be implemented in an order other than the order illustrated or described in this specification. Also, the terms "comprising" and "having" and any variants thereof cover non-exclusive inclusion. For example, a procedure, method, system, product or device comprising a series of steps or units is not limited to only including these steps or units explicitly listed, but may also include other steps or units not explicitly listed, or other steps or units inherent to these procedures, methods, products or devices. It should be noted that "and / or" used in the description and claims means representing at least one of the connected objects. For example, "A and / or B and / or C" means the seven cases where only A exists, only B exists, only C exists, both A and B exist, both B and C exist, both A and C exist, and all of A, B, and C exist. Similarly, "at least one of A and B" used in this specification and claims should be understood as "only A exists, only B exists, or both A and B exist".

[0199] What has been described above are only specific embodiments of the present disclosure, and the protection scope of the present disclosure is not limited thereto. A person skilled in the art can easily conceive of variations and substitutions within the technical scope described in the present disclosure, and all of these variations and substitutions should be within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should follow the appended claims.

Claims

1. A method for transmitting remote terminal information, comprising: a first relay terminal transmits information of a remote terminal to a base station, wherein the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information including at least one of a user-to-network (Uu) interface identifier and a sidelink (PC5) interface identifier of the remote terminal; before transmitting the information of the remote terminal to the base station, the method further includes: the first relay terminal receives the information of the remote terminal via a sidelink with the remote terminal; the first relay terminal transmits the information of the remote terminal to the base station when a preset condition is satisfied, and the preset condition includes: a first preset condition that the remote terminal is in an RRC idle state or an inactive state, the first relay terminal is in an RRC connected state, and at least one of a common control resource set (CORESET) and a common search space is not configured in the first relay terminal; a second preset condition that the first relay terminal receives the first Uu RRC message transmitted from the remote terminal from the sidelink; a third preset condition that the first relay terminal detects that a radio link with the remote terminal is disconnected, and the method includes at least one of them.

2. The information of the remote terminal further includes: a radio resource control (RRC) status of the remote terminal; paging reception requirement information of the remote terminal for indicating whether paging transfer by a relay terminal is required; information on whether the first relay terminal has received a Uu RRC message of the remote terminal; and at least one of connection status information of a sidelink of the remote terminal. The method according to claim 1.

3. When the second preset condition is satisfied, the first relay terminal caches the first Uu RRC message, and after transmitting the information of the remote terminal to the base station, the method includes: The first relay terminal receives and stores a correspondence relationship between the PC5 interface identifier of the remote terminal and the local relay identifier transmitted from the base station, where the local relay identifier is identification information assigned by the base station for identifying the remote terminal on the Uu interface between the first relay terminal and the base station. And The method according to claim 1, further comprising at least one of: the first relay terminal receives the Uu interface configuration information of the remote terminal transmitted from the base station, where the Uu interface configuration information includes at least one of the configuration information of the signaling radio bearer (SRB) and the configuration information of the data radio bearer (DRB), and the first relay terminal executes the configuration of the Uu interface according to the Uu interface configuration information of the remote terminal.

4. Executing the above-mentioned configuration of the Uu interface includes configuring, for the remote terminal, an entity corresponding to the Uu interface in at least one of the local adaptation layer, the radio link control (RLC) layer, and the media access control (MAC) layer. The method The method according to claim 3, further comprising: when the first relay terminal detects that the radio link between the first relay terminal and the remote terminal is disconnected, the first relay terminal transmits indication information for indicating that the radio link between the first relay terminal and the remote terminal is disconnected to the base station.

5. The method The method according to claim 3, further comprising: after adding the local relay identifier corresponding to the remote terminal into the adaptation layer header of the first Uu RRC message, the first relay terminal transmits the first Uu RRC message to the base station. The method The method according to claim 3, further comprising: the first relay terminal receives the first Uu RRC message transmitted from the base station, determines a first remote terminal corresponding to the first local relay identifier according to the correspondence relationship between the PC5 interface identifier of the remote terminal stored locally and the local relay identifier, and the first local relay identifier carried in the adaptation layer header of the first Uu RRC message, and the first relay terminal transmits the first Uu RRC message to the first remote terminal.

6. A method for receiving remote terminal information, comprising The base station receives information of a remote terminal transmitted from a first relay terminal, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information including a Uu interface identifier and a PC5 interface identifier of the remote terminal, The base station, according to the information of the remote terminal, allocates a local relay identifier for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, determines a first correspondence relationship among the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmits 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 transmits Uu interface configuration information including at least one of SRB configuration information and DRB configuration information, which is the Uu interface configuration information of the remote terminal, to the first relay terminal, including performing at least one of the processes of determining a paging transmission method of the remote terminal, The base station receiving information of the remote terminal transmitted from the first relay terminal includes the base station receiving the information of the remote terminal transmitted from the first relay terminal when a preset condition is satisfied, The preset conditions include a first preset condition that the remote terminal is in the RRC idle state or the non-active state, the first relay terminal is in the RRC connected state, and at least one of a common control resource set (CORESET) and a common search space is not configured in the first relay terminal, a second preset condition that the first relay terminal receives the first Uu RRC message transmitted from the remote terminal from a sidelink between the first relay terminal and the remote terminal, a third preset condition that the first relay terminal detects that the radio link with the remote terminal is disconnected, including at least one of them, Method.

7. The information of the remote terminal includes the radio resource control (RRC) status of the remote terminal, and Paging reception requirement information of the remote terminal, which is paging reception requirement information for instructing whether paging transfer by a relay terminal is necessary, Information on whether the first relay terminal has received a Uu RRC message of the remote terminal, The method according to claim 6, further including at least one of information on the connection status of the sidelink of the remote terminal.

8. The method includes: The base station receives the second Uu RRC message of the remote terminal transmitted from the first relay terminal, determines a Uu interface identifier of a second remote terminal corresponding to a second local relay identifier according to the first corresponding relationship stored locally, which is carried in an adaptation layer header of the second Uu RRC message, and processes the second Uu RRC message based on the Uu interface identifier of the second remote terminal. And When the base station transmits a third Uu RRC message of a third remote terminal to the first relay terminal, it further includes at least one of determining a local relay identifier corresponding to the third remote terminal according to the first corresponding relationship stored locally, adding it to an adaptation layer header of the third Uu RRC message, and then transmitting it to the first relay terminal. The method according to claim 6.

9. The paging transmission method includes A first transmission method in which the base station transmits a paging message of the remote terminal at a paging opportunity of the remote terminal via a paging channel, The method according to claim 6, including one or more of a second transmission method in which the base station transmits a paging message of the remote terminal to a relay terminal via dedicated signaling and transfers it to the remote terminal via the relay terminal.

10. The process of determining the above paging transmission method of the remote terminal is When the information of the remote terminal indicates that the sidelink of the remote terminal has been disconnected and no information of the remote terminal transmitted from a relay terminal other than the first relay terminal has been received, determining that the paging transmission method of the remote terminal is the first transmission method. When at least one of a common CORESET and a common search space is not configured on the active bandwidth part (BWP) of the first relay terminal, determining whether the paging transmission method of the remote terminal is the second transmission method or a combination of the first transmission method and the second transmission method; When at least one of a common CORESET and a common search space is configured on the active BWP of the first relay terminal, determining that the paging transmission method of the remote terminal is the first transmission method, the method according to claim 9, including at least one of them.

11. The method includes: The base station receiving instruction information transmitted from the first relay terminal for instructing that the radio link between the fourth remote terminal and the first relay terminal has been disconnected; The base station releasing the related configuration of the fourth remote terminal according to the instruction information, deleting the local relay identifier assigned to the fourth remote terminal, and deleting the second correspondence relationship between the Uu interface identifier and the local relay identifier of the fourth remote terminal, and determining the paging transmission method of the fourth remote terminal based on the information of the fourth remote terminal reported from each received relay terminal, the method according to claim 6, further including this.

12. A first relay terminal, including a transmission unit for transmitting information of a remote terminal to a base station, where the remote terminal accesses the base station through the first relay terminal, and the information of the remote terminal includes at least one of a user-to-network (Uu) interface identifier and a sidelink (PC5) interface identifier of the remote terminal; The first relay terminal further includes a first receiving unit for receiving the information of the remote terminal through a sidelink between the first relay terminal and the remote terminal before transmitting the information of the remote terminal to the base station; The first relay terminal transmits the information of the remote terminal to the base station when a preset condition is satisfied, and the preset condition includes The first preset condition that the remote terminal is in the RRC idle state or the inactive state, the first relay terminal is in the RRC connected state, and at least one of a common control resource set (CORESET) and a common search space is not configured in the first relay terminal, The second preset condition that the first relay terminal receives the first Uu RRC message transmitted from the remote terminal via the sidelink, The third preset condition that the first relay terminal detects that the radio link with the remote terminal is disconnected, at least one of which is included, The first relay terminal. [

13. ] A base station, A receiving unit for receiving information of a remote terminal transmitted from a first relay terminal, where the remote terminal accesses the base station via the first relay terminal, and the information of the remote terminal includes information of a Uu interface identifier and a PC5 interface identifier of the remote terminal, According to the information of the remote terminal, Allocating a local relay identifier for identifying the remote terminal on the Uu interface between the first relay terminal and the base station, determining a first correspondence relationship between the Uu interface identifier, the PC5 interface identifier, and the local relay identifier of the remote terminal, and transmitting a second correspondence relationship between the PC5 interface identifier and the local relay identifier of the remote terminal to the first relay terminal, Configuring an entity corresponding to the Uu interface of the remote terminal, and transmitting Uu interface configuration information including at least one of SRB configuration information and DRB configuration information, which is the Uu interface configuration information of the remote terminal, to the first relay terminal, A processing unit for executing at least one of the processes of determining the paging transmission method of the remote terminal, The receiving unit receives the information of the remote terminal transmitted from the first relay terminal when the preset condition is satisfied, The preset condition includes, The first preset condition that the remote terminal is in the RRC idle state or the inactive state, the first relay terminal is in the RRC connected state, and at least one of a common control resource set (CORESET) and a common search space is not configured in the first relay terminal, The second preset condition that the first relay terminal receives the first Uu RRC message transmitted from the remote terminal via a sidelink between the first relay terminal and the remote terminal, Among the third preset condition that the first relay terminal detects that the radio link with the remote terminal has been disconnected, at least one is included, Base station.

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