User terminal access method, device, user terminal, and storage medium

Abstract

The present disclosure provides a user terminal access method, an apparatus, a user terminal and a storage medium. A target relay user terminal receives a connection establishment request message sent by a user terminal through a sidelink communication interface, the connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is used to indicate that the user terminal is a remote user terminal or a relay user terminal. According to the present invention, when a user terminal tries to access a target relay user terminal, the target relay user terminal can accurately identify the identity information of the user terminal that tries to access, and can adopt an operation corresponding to the identity of the user terminal to ensure the normal operation of the system.

Description

[Technical Field]

[0001] The present disclosure relates to the field of communication technologies, and in particular to a user terminal access method, device, user terminal, and storage medium. [Background technology]

[0002] The 5G New Radio (NR) system introduces UE-to-Network Relay, which relays from a user terminal to a network device, and UE-to-UE Relay, which relays from a user terminal to a user terminal, to extend the network coverage range. Here, a relay user terminal (Relay UE) is a user terminal within the network coverage range, and a remote user terminal may be within or outside the network coverage range. In the case of UE-to-Network Relay, a remote user terminal can access a network device via a relay user terminal, and in the case of UE-to-UE Relay, a remote user terminal can access a target user terminal via a relay user terminal.

[0003] In the prior art, only one-hop relay is supported, i.e., a user terminal accesses a network device or a target user terminal through a one-hop relay user terminal. Later, in order to support a more flexible network topology, multi-hop relay may be introduced, but there is no clear idea how to establish a relay connection in the multi-hop case. Summary of the Invention [Problem to be solved by the invention]

[0004] Book Disclosure provides a user terminal access method, device, user terminal and storage medium for realizing the establishment of a relay connection in a multi-hop scenario. [Means for solving the problem]

[0005] In a first aspect, the present disclosure provides a user terminal access method applied to a target relay user terminal, the method comprising: receiving a connection establishment request message transmitted by a user terminal via a sidelink communication interface; The connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0006] As an optional embodiment, the user terminal access method further includes: performing, based on the identity identifier of the user terminal, a target operation corresponding to the identity identifier of the user terminal.

[0007] In an alternative embodiment, the connection establishment request message is a PC5 connection establishment request message, and the PC5 connection establishment request message includes PC5-S signaling and / or PC5-RRC signaling.

[0008] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0009] In an optional embodiment, the step of performing a target operation corresponding to the identity identifier of the user terminal based on the identity identifier of the user terminal includes: The user terminal is a remote user terminal is if so, establishing a sidelink communication connection with the user terminal via the sidelink communication interface; The user terminal is a relay user terminal isif it determines that the user terminal is a target network device, the target remote user terminal, and the previous-hop relay user terminal, establishes a sidelink communication interface connection with the user terminal and sends an indication message to at least one of the target network device, the target remote user terminal, and the previous-hop relay user terminal, and / or establishes a sidelink communication interface connection with the user terminal and updates its own routing table; instructions message is used to instruct the target network device, the target remote user terminal, or the previous-hop relay user terminal to update the corresponding routing table.

[0010] In an alternative embodiment, the user terminal is a relay user terminal. is In this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0011] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0012] In an optional embodiment, the user terminal access method further includes a step of determining a relay operation mode to be used after the user terminal accesses the target relay user terminal based on the relay capability indication information of the user terminal included in the connection establishment request message.

[0013] In an optional embodiment, the user terminal access method further includes sending a response message corresponding to the connection establishment request message to the user terminal; The response message includes indication information for indicating the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0014] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0015] In a second aspect, an embodiment of the present disclosure provides a user terminal access method applied to a user terminal, the method comprising: sending a connection establishment request message to a target relay user terminal via a sidelink communication interface; The connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0016] In an alternative embodiment, before sending a connection establishment request message to the target relay user terminal via the sidelink communication interface, the user terminal access method comprises: The method further includes determining a target relay user terminal based on the identity of the user terminal.

[0017] In an alternative embodiment, the step of determining the target relay user terminal based on the identity of the user terminal comprises: The user terminal If it is a remote user terminal selecting one relay user terminal as a target relay user terminal among the relay user terminals that satisfy a first preset condition; or The user terminal is a relay user terminal is selecting N relay user terminals as target relay user terminals among the relay user terminals that satisfy the second preset condition; N is an integer of 1 or greater.

[0018] In an optional embodiment, the second preset condition is: The relay operation modes supported by the user terminal include the relay operation mode currently used by the target relay user terminal; the channel quality of the sidelink communication interface between the user terminal and the relay user terminal is higher than a preset threshold; Contains at least one of the following:

[0019] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0020] In an alternative embodiment, the user terminal is a relay user terminal. is In this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0021] In an alternative embodiment, the user terminal access method includes the steps of receiving a relay discovery message broadcast from a target relay user terminal, the relay discovery message including a relay operation mode of the target relay user terminal; and determining, based on the relay operation mode of the target relay user terminal, a relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0022] In an optional embodiment, the user terminal access method further includes receiving a response message corresponding to the connection establishment request message sent from the target relay user terminal; The response message includes indication information for indicating the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0023] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0024] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0025] In a third aspect, an embodiment of the present disclosure provides a user terminal access device applied to a target relay user terminal, the device comprising: a receiving module adapted to receive a connection establishment request message transmitted by a user terminal via a sidelink communication interface; The connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0026] In a fourth aspect, an embodiment of the present disclosure provides a user terminal access device applied to a user terminal, the device comprising: a transmitting module adapted to transmit a connection establishment request message to a target relay user terminal via a sidelink communication interface; The connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0027] In a fifth aspect, embodiments of the present disclosure include: target A relay user terminal is provided, the relay user terminal comprising: memory for storing computer programs; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading a computer program stored in a memory and for performing the following operations: receiving a connection establishment request message sent by a user terminal via a sidelink communication interface, the connection establishment request message including an identity identifier of the user terminal, the identity identifier of the user terminal being A remote user terminal or a relay user terminal It is used to indicate.

[0028] In an alternative embodiment, the processor is further adapted to perform the following operations: Based on the identity identifier of the user terminal, a target operation corresponding to the identity identifier of the user terminal is performed.

[0029] In an alternative embodiment, the connection establishment request message is a PC5 connection establishment request message, and the PC5 connection establishment request message includes PC5-S signaling and / or PC5-RRC signaling.

[0030] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0031] In an optional embodiment, performing a target operation corresponding to the identity identifier of the user terminal based on the identity identifier of the user terminal includes: The user terminal is a remote user terminal is if so, establishing a sidelink communication connection with the user terminal via the sidelink communication interface; The user terminal is a relay user terminal is if it determines that the user terminal is a target network device, the target remote user terminal, and the previous-hop relay user terminal, establishes a sidelink communication interface connection with the user terminal and sends an indication message to at least one of the target network device, the target remote user terminal, and the previous-hop relay user terminal, and / or establishes a sidelink communication interface connection with the user terminal and updates its own routing table; instructions message is used to instruct the target network device, the target remote user terminal, or the previous-hop relay user terminal to update the corresponding routing table.

[0032] In an alternative embodiment, the user terminal is a relay user terminal. isIn this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0033] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0034] In an alternative embodiment, the processor is further adapted to perform the following operations: Based on the relay capability indication information of the user terminal included in the connection establishment request message, a relay operation mode to be used after the user terminal accesses the target relay user terminal is determined.

[0035] In an alternative embodiment, the processor is further adapted to perform the following operations: sending a response message to the user terminal in response to the connection establishment request message; The response message includes indication information for indicating the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0036] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0037] In a sixth aspect, an embodiment of the present disclosure provides a user terminal, the user terminal comprising: memory for storing computer programs; a transceiver that transmits and receives data under the control of a processor; a processor for reading a computer program stored in a memory and for performing the following operations: Send a connection establishment request message to the target relay user terminal via the sidelink communication interface, the connection establishment request message including an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0038] In an alternative embodiment, the processor is further adapted to perform the following operations: A target relay user terminal is determined based on the identity of the user terminal.

[0039] In an alternative embodiment, determining the target relay user terminal based on the identity of the user terminal comprises: The user terminal If it is a remote user terminal selecting one relay user terminal as a target relay user terminal among the relay user terminals that satisfy a first preset condition; or The user terminal is a relay user terminal is selecting N relay user terminals as target relay user terminals among the relay user terminals that satisfy the second preset condition; N is an integer of 1 or greater.

[0040] In an optional embodiment, the second preset condition is: The relay operation modes supported by the user terminal include the relay operation mode currently used by the target relay user terminal; the channel quality of the sidelink communication interface between the user terminal and the relay user terminal is higher than a preset threshold; Contains at least one of the following:

[0041] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0042] In an alternative embodiment, the user terminal is a relay user terminal. is In this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0043] In an alternative embodiment, the processor is further adapted to perform the following operations: receiving a relay discovery message broadcast from a target relay user terminal, the relay discovery message including a relay operation mode of the target relay user terminal; Based on the relay operation mode of the target relay user terminal, determine the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0044] In an alternative embodiment, the processor is further adapted to perform the following operations: A response message corresponding to the connection establishment request message sent from the target relay user terminal is received, and the response message includes indication information for indicating a relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0045] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0046] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0047] In a seventh aspect, an embodiment of the present disclosure provides a processor-readable storage medium having a computer program stored therein, the computer program being used to cause the processor to perform the user terminal access method of the first aspect and / or the second aspect.

[0048] In an eighth aspect, embodiments of the present disclosure provide a computer program M Provide ,Ko When the computer program is executed by a processor, it implements the user terminal access method of the first aspect and / or the second aspect.

[0049] This disclosure Gayu User terminal access method, device, user terminal and storage medium This method provides receiving a connection establishment request message sent by a user terminal via a sidelink communication interface, the connection establishment request message including an identity identifier of the user terminal, the identity identifier of the user terminal being A remote user terminal or a relay user terminal According to this solution, when a user terminal attempts to access a target relay user terminal, the target relay user terminal can accurately identify the identity information of the user terminal that the user terminal is attempting to access, and can thereby adopt an operation corresponding to the identity of the user terminal to ensure the normal operation of the system.

[0050] It should be noted that the contents described in this section are not intended to identify key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will be readily understood from the following description. [Brief explanation of the drawings]

[0051] In order to more clearly explain the technical solutions in the present disclosure or the prior art, the following briefly introduces drawings that need to be used in the description of the embodiments or the prior art. Of course, the drawings in the following description are only part of the embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without any creative work.

[0052] [Figure 1] 1 is a schematic diagram of an application scenario of a user terminal access method in the prior art; [Figure 2]1 is a schematic diagram of an application scenario of a user terminal access method provided by an embodiment of the present disclosure; FIG. [Figure 3] 1 is a schematic diagram of signaling interactions of a user terminal access method provided by an embodiment of the present disclosure; FIG. [Figure 4] 2 is a schematic diagram of signaling interactions of a user terminal access method provided by an embodiment of the present disclosure; [Figure 5] 3 is a schematic diagram of signaling interactions of a user terminal access method provided by an embodiment of the present disclosure; [Figure 6] 1 is a schematic diagram of the configuration of a user terminal access device provided by an embodiment of the present disclosure; FIG. [Figure 7] 2 is a schematic diagram of the configuration of a user terminal access device provided by an embodiment of the present disclosure; FIG. [Figure 8] FIG. 2 is a schematic diagram of a configuration of a relay user terminal provided by an embodiment of the present disclosure; [Figure 9] FIG. 2 is a schematic diagram of a configuration of a user terminal provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0053] In the present disclosure, the term "and / or" describing an association relationship between related objects means that three relationships can exist, for example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the related objects before and after it are in an "or" relationship. The term "plurality" in the embodiments of the present disclosure means two or more, and other counters are similar.

[0054] Hereinafter, the technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present disclosure.

[0055] The 5G New Radio (NR) system introduces UE-to-Network Relay, which relays from a user terminal to a network device, and UE-to-UE Relay, which relays from a user terminal to a user terminal, to extend the network coverage range. Here, a relay user terminal (Relay UE) is a user terminal within the network coverage range, and a remote user terminal may be within or outside the network coverage range. In the case of UE-to-Network Relay, a remote user terminal can access a network device via a relay user terminal, and in the case of UE-to-UE Relay, a remote user terminal can access a target user terminal via a relay user terminal.

[0056] 1 is a schematic diagram of an application scenario of a user terminal access method in the prior art. As shown in FIG. 1, the scenario includes a remote user terminal 101, a relay user terminal 102, and a target device 103.

[0057] In practical applications, the target device 103 may be a network device such as a base station, or may be other user terminal devices such as other remote user terminals, and FIG. 1 illustrates a base station as an example, but is not limited to this.

[0058] Here, the relay user terminal 102 is within the communication range of the target device 103, and the remote user terminal 101 is outside the communication range of the target device 103. In order to realize communication with the target device 103, the remote user terminal 101 may transfer relevant data through the relay user terminal 102, thereby realizing data transmission with the target device 103.

[0059] In the prior art, only one-hop relay is supported, i.e., a remote user terminal 101 accesses a network device or a target user terminal through a one-hop relay user terminal. Later, in order to support a more flexible network topology, multi-hop relay may be introduced, but there is no clear idea how to establish a relay connection in the multi-hop case.

[0060] In a multi-hop relay scenario, when a general remote user terminal and a user terminal expected to perform relay operations access a target relay user terminal, the behavior of the target relay user terminal will be different. Therefore, in order to enable the target relay user terminal to identify the identity of the accessing user terminal, it is necessary to consider an extension mechanism for performing different operations depending on the identity of the accessing user terminal.

[0061] Therefore, to solve the above-mentioned problems, the embodiments of the present disclosure provide a user terminal access method, device, user terminal, and storage medium, in which, when a user terminal attempts to access a target relay user terminal, the connection establishment request message includes the identity identifier of the user terminal, so that the target relay user terminal can accurately identify the identity information of the user terminal it is attempting to access, and thereby adopt operations corresponding to the identity of the user terminal to ensure the normal operation of the system.

[0062] 2 is a schematic diagram of an application scenario of the user terminal access method provided by the embodiment of the present disclosure. As shown in FIG. 2, the scenario includes a remote user terminal 201, a relay user terminal 202 (relay user terminal 1, relay user terminal 2, ... relay user terminal M are shown in the figure as examples, where M is an integer greater than 1), and a target device 103.

[0063] In practical applications, the target device 203 may be a network device such as a base station, or may be other user terminal devices such as other remote user terminals, and FIG. 2 illustrates a base station as an example, but is not limited to this.

[0064] Furthermore, the above-mentioned remote user terminal 201 and relay user terminal 202 may be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity capabilities, or other processing devices connected to wireless modems.

[0065] In different systems, the user terminal may be called a user device (User Equipment, UE), for example, in a 5G system, the user terminal may be called a user device (User Equipment, UE), which may be a wireless terminal, where the wireless terminal can communicate with one or more core networks (Core Networks, CN) via a Radio Access Network (RAN). The wireless terminal may be a mobile terminal such as a mobile phone (or "cellular" phone) or a computer with a mobile terminal, for example, a portable, pocketable, handheld, computer-integrated, or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. Examples include devices such as a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiated Protocol (SIP) phone, a Wireless Local Loop (WLL) station, and a Personal Digital Assistant (PDA). A wireless terminal may also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, and is not limited to embodiments of the present disclosure.

[0066] The technical solutions provided by the embodiments of the present disclosure can be applied to various systems, particularly 5G systems. For example, applicable systems include a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a long term evolution advanced (LTE-A) system, a universal mobile telecommunication system (UMTS), a worldwide interoperability for microwave access (WiMAX) system, and a 5G new radio (NR) system. Many of these systems include user terminals and network devices. The system also includes core network components such as the Evolved Packet System (EPS) and the 5G System (5GS).

[0067] It should be understood that the above-mentioned Figure 2 is schematic, and the above-mentioned scene may also include other network devices, which may further include wireless relay devices and wireless return devices not shown in Figure 2.

[0068] It should be noted that the methods and apparatuses provided in the embodiments of the present disclosure are based on the same application concept, and the principles by which the methods and apparatuses solve problems are similar, so the implementations of the apparatuses and methods can refer to each other, and the overlapping points will no longer be described.

[0069] 3 is a schematic diagram 1 of signaling interaction of a user terminal access method provided by an embodiment of the present disclosure. As shown in FIG. 3, the user terminal access method may include the following steps:

[0070] S301, a user terminal sends a connection establishment request message to a target relay user terminal via a sidelink communication interface.

[0071] Wherein, the connection establishment request message is for requesting the establishment of a sidelink communication connection with the target relay user terminal, and the connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is Gayu User terminal A remote user terminal or a relay user terminal It is used to indicate.

[0072] Here, the specific understanding as a relay user terminal means that it is desirable for the user terminal to operate as a relay user terminal after accessing the target relay user terminal.

[0073] For example, referring to FIG. 2, if the user terminal is a remote user terminal 201, the target relay user terminal is a relay user terminal 1, and the identity identifier is A remote user terminal or a relay user terminal It is used to indicate where: The remote user terminal 201 Relay user terminal is This means that after the remote user terminal 201 accesses the relay user terminal 1, the relay function is turned on and the remote user terminal 201 operates as a relay user terminal.

[0074] In response, the target relay user terminal receives a connection establishment request message sent by the user terminal over the sidelink communication interface.

[0075] Furthermore, the target relay user terminal obtains the identity identifier carried in the connection establishment request message, and performs corresponding operations according to the identity identifier, and specific embodiments are given in the following examples.

[0076] In the user terminal access method provided by the present disclosure, a user terminal sends a connection establishment request message to a target relay user terminal via a sidelink communication interface, and the target relay user terminal receives the connection establishment request message sent by the user terminal via the sidelink communication interface. The connection establishment request message includes an identity identifier of the user terminal, so that the relay user terminal can perform a corresponding operation based on the identity identifier of the accessing user terminal. Thus, when a user terminal attempts to access the target relay user terminal, the target relay user terminal can accurately identify the identity information of the accessing user terminal and thereby adopt an operation corresponding to the identity of the user terminal, thereby ensuring normal system operation.

[0077] In some embodiments, the connection establishment request message may employ a PC5 connection establishment request message, where the PC5 connection establishment request message may include PC5-S signaling and / or PC5-RRC signaling.

[0078] In another embodiment, the identity identifier of the user terminal may be explicitly or implicitly included in the connection establishment request message.

[0079] In one aspect, the identity identifier of the user terminal is explicitly included in the connection establishment request message, The connection establishment request message contains indication information, and depending on the value of the indication information, the user terminal A remote user terminal or a relay user terminal This includes showing

[0080] For example, if the value of the indication information (for example, 1 bit) included in the connection establishment request message is 0, the user terminal is a remote user terminal. is If the value of this bit indication information is 1, it indicates that the user terminal accesses the target relay user terminal as a relay user terminal.

[0081] In another aspect, the identity identifier of the user terminal is implicitly included in the connection establishment request message, The connection establishment request message optionally contains indication information, and depending on whether the indication information is included, the user terminal A remote user terminal or a relay user terminal Shows.

[0082] For example, the connection establishment request message optionally includes indication information (for example, 1 bit), and when the connection establishment request message includes this 1 bit indication information, the user terminal is a remote user terminal. is If this 1-bit indication information is not included in the connection establishment request message, the user terminal is a relay user terminal. is This indicates that...

[0083] The above methods of explicitly and implicitly including instruction information are merely examples, and other similar methods will not be described here.

[0084] 4 is a schematic diagram 2 of signaling interactions of a user terminal access method provided by an embodiment of the present disclosure. As shown in FIG. 4, the user terminal access method provided by an embodiment of the present disclosure may include the following steps:

[0085] S401, a user terminal determines a target relay user terminal based on the identity of the user terminal.

[0086] R Remote User Terminal as User terminal and Recipient's terminal asIt should be understood that the methods adopted for determining the target relay user terminal are different between the user terminal and the relay user terminal, and each will be described below based on a specific embodiment.

[0087] (1) User terminal If it is a remote user terminal , select one relay user terminal as a target relay user terminal among the relay user terminals that satisfy the first preset condition.

[0088] In practical application, the embodiment of the present disclosure is not limited to the first preset condition. For example, the first preset condition may be AS (Access Stratum) Layer Reference and / or NAS (Non Access Stratum) The determination may be based on criteria.

[0089] Illustratively, the first preset condition is A S group If the first preset condition is met, the first preset condition may be that the channel quality of the sidelink communication interface between the user terminal and each candidate relay user terminal is higher than a preset threshold. Reference signal received power ( RSRP ) ), and the user terminal selects one and only one relay user terminal as the target relay user terminal from among the candidate relay user terminals that satisfy the channel quality condition of the sidelink communication interface (i.e., higher than a preset threshold).

[0090] In another embodiment, the NA S's The NAS may determine whether the candidate relay user terminals satisfy a first preset condition based on the relay selection rule, and the user terminal selects one relay user terminal as a target relay user terminal from among the candidate relay user terminals that satisfy the first preset condition. The content of the NAS relay selection rule is not specifically limited in the embodiments of the present disclosure.

[0091] (2) The user terminal is a relay user terminal isIn this case, select N relay user terminals as target relay user terminals from among the relay user terminals that satisfy the second preset condition.

[0092] Here, the second preset condition is: The relay operation modes supported by the user terminal include the relay operation mode currently used by the target relay user terminal; the channel quality of the sidelink communication interface between the user terminal and the relay user terminal is higher than a preset threshold; Contains at least one of the following:

[0093] S402, the user terminal sends a connection establishment request message to a target relay user terminal via a sidelink communication interface.

[0094] It should be understood that step S402 has the same technical solution and beneficial effects as step S301 in the embodiment shown in FIG. 3, and specific details can be found in the above-mentioned embodiment, and the description will be omitted here.

[0095] S403, the target relay user terminal performs a target operation corresponding to the identity identifier of the user terminal according to the identity identifier of the user terminal.

[0096] Next, in relation to steps S4031 to S4032, the target operations corresponding to the user terminals of the two identities will be described in detail.

[0097] S4031, the user terminal is a remote user terminal is If so, the target relay user terminal establishes a sidelink communication interface connection with the user terminal.

[0098] S4032, the user terminal is a relay user terminal isIf it is determined that the relay user terminal needs to establish a sidelink communication interface connection with the user terminal, and send an indication message to at least one device among the target network device, the target remote user terminal, and the previous-hop relay user terminal, and / or establish a sidelink communication interface connection with the user terminal and update its own routing table.

[0099] instructions message is used to instruct the target network device, the target remote user terminal, or the previous-hop relay user terminal to update the corresponding routing table.

[0100] For example, referring to FIG. 2, the target relay user terminal is an example of the relay user terminal 1, and the target network device or The target remote user terminal is target device 203 in FIG.

[0101] In this step, the user terminal sends a connection establishment request message to the relay user terminal 1, and the identity identifier of the user terminal included in the connection establishment request message indicates that the user terminal is a relay user terminal. The relay user terminal 1 determines that the identity of the user terminal is a relay user terminal based on the identity identifier, and then the relay user terminal 1 sends indication information to the target device 203, and as an optional embodiment, also sends indication information to other relay user terminals, such as the relay user terminal 2, the relay user terminal M, etc., so as to cause the target device 203 and / or the relay user terminal 2, the relay user terminal M, etc. to update routing information.

[0102] In some embodiments, the user terminal is a relay user terminal. is In this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0103] Here, the relay operation mode and relay capability instruction information are Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0104] In the embodiments of the present disclosure, the target relay user terminal can perform different operations based on the identity of the accessing user terminal, so that when a user terminal attempts to access the target relay user terminal, the target relay user terminal can accurately identify the identity information of the accessing user terminal, and thereby adopt an operation corresponding to the identity of the user terminal to ensure the normal operation of the system.

[0105] Next, the user terminal is a relay user terminal. is A specific embodiment of the case will be described based on a specific example.

[0106] 5 is a schematic diagram 3 of signaling interactions of a user terminal access method provided by an embodiment of the present disclosure. As shown in FIG. 5, the user terminal access method provided by an embodiment of the present disclosure may include the following steps:

[0107] S501, a user terminal determines a target relay user terminal based on the identity of the user terminal.

[0108] Here, step S501 is the same as step S401 in the embodiment shown in FIG. 4, and therefore a description thereof will be omitted here.

[0109] S502, the user terminal receives a relay discovery message broadcast from a target relay user terminal.

[0110] Here, the relay discovery message includes the relay operation mode of the target relay user terminal.

[0111] S503, the user terminal determines, based on the relay operation mode of the target relay user terminal, a relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0112] S504, the user terminal sends a connection establishment request message to the target relay user terminal via the sidelink communication interface.

[0113] Here, the connection establishment request message further includes relay capability indication information of the user terminal and / or a relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0114] S505, the target relay user terminal performs a target operation corresponding to the identity identifier of the user terminal according to the identity identifier of the user terminal.

[0115] Here, step S50 4 Steps S402 to S505 are the same as steps S402 to S403 in the embodiment shown in FIG. 4, and so a description thereof will be omitted here.

[0116] S506, the target relay user terminal determines a relay operation mode to be used after the user terminal accesses the target relay user terminal according to the relay capability indication information of the user terminal included in the connection establishment request message.

[0117] S507, the target relay user terminal sends a response message corresponding to the connection establishment request message to the user terminal.

[0118] Here, the response message includes indication information for indicating the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0119] In response to this, the user terminal receives a response message corresponding to the connection establishment request message sent by the target relay user terminal, and obtains the relay operation mode indicated in the response message to be used after the user terminal accesses the target relay user terminal, and operates in accordance with the relay operation mode after accessing the target relay user terminal.

[0120] On the target relay user terminal side, the embodiment of the present disclosure provides a user terminal access device applied to the target relay user terminal. Figure 6 is a schematic diagram 1 of the configuration of the user terminal access device provided by the embodiment of the present disclosure. As shown in Figure 6, the user terminal access device 600 includes: a receiving module 601 used for receiving a connection establishment request message sent by a user terminal via a sidelink communication interface; The connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0121] As an alternative embodiment, the user terminal access device 600 further includes a processing module 602 adapted to perform a target operation corresponding to the identity identifier of the user terminal based on the identity identifier of the user terminal.

[0122] In an alternative embodiment, the connection establishment request message is a PC5 connection establishment request message, and the PC5 connection establishment request message includes PC5-S signaling and / or PC5-RRC signaling.

[0123] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0124] In an alternative embodiment, the processing module 602 specifically: When the user terminal determines to access the target relay user terminal as a remote user terminal, establishing a sidelink communication interface connection between the target relay user terminal and the user terminal; and When the user terminal determines to access the target relay user terminal as a relay user terminal, the user terminal establishes a sidelink communication interface connection between the target relay user terminal and the user terminal, and sends an indication message to at least one device among the target network device, the target remote user terminal, and the previous-hop relay user terminal, and / or establishes a sidelink communication interface connection between the target relay user terminal and the user terminal, and updates its own routing table; instructions message is used to instruct the target network device, the target remote user terminal, or the previous-hop relay user terminal to update the corresponding routing table.

[0125] As an optional embodiment, when the user terminal accesses the target relay user terminal as a relay user terminal, the connection establishment request message further includes relay capability indication information of the user terminal and / or a relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0126] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0127] As an optional embodiment, the user terminal access device 600 further includes a determination module 603 used to determine a relay operation mode to be used after the user terminal accesses a target relay user terminal based on the relay capability indication information of the user terminal included in the connection establishment request message.

[0128] As an optional embodiment, the user terminal access device 600 further includes a sending module 604, used for sending a response message corresponding to the connection establishment request message to the user terminal; The response message includes indication information for indicating the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0129] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0130] It is necessary to explain here that the above user terminal access device provided by the present disclosure can accordingly realize all the method steps realized by the target relay user terminal in the above method embodiment, and can achieve the same technical effects, and the same parts and beneficial effects as those in the method embodiment in this embodiment will not be described here.

[0131] On the user terminal side, the embodiment of the present disclosure provides a user terminal access device applied to the user terminal. Figure 7 is a schematic diagram 2 of the configuration of the user terminal access device provided by the embodiment of the present disclosure. As shown in Figure 7, the user terminal access device 700 includes: a sending module 701 adapted to send a connection establishment request message to a target relay user terminal via a sidelink communication interface; The connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0132] In an alternative embodiment, the user terminal access device 700: It further includes a determination module 702 used to determine a target relay user terminal based on the identity of the user terminal.

[0133] In an alternative embodiment, the determination module 702 specifically: The user terminal If it is a remote user terminal , selecting one relay user terminal as a target relay user terminal among the relay user terminals that satisfy the first preset condition; or The user terminal is a relay user terminal is select N relay user terminals as target relay user terminals among the relay user terminals that satisfy the second preset condition, N is an integer of 1 or greater.

[0134] In an optional embodiment, the second preset condition is: The relay operation modes supported by the user terminal include the relay operation mode currently used by the target relay user terminal; the channel quality of the sidelink communication interface between the user terminal and the relay user terminal is higher than a preset threshold; Contains at least one of the following:

[0135] In an alternative embodiment, the identity identifier of the user terminal is explicitly or implicitly included in the connection establishment request message.

[0136] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0137] In an alternative embodiment, the user terminal is a relay user terminal. is In this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0138] In an alternative embodiment, the user terminal access device 700 includes: a receiving module 703, which is used for receiving a relay discovery message broadcasted by a target relay user terminal, the message including the relay operation mode of the target relay user terminal; and a determination module 704 used for determining, based on the relay operation mode of the target relay user terminal, a relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0139] As an optional embodiment, the receiving module 703 is further adapted to receive a response message corresponding to the connection establishment request message sent from the target relay user terminal; The response message includes indication information for indicating the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0140] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0141] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0142] It is necessary to explain here that the above user terminal access device provided by the present disclosure can accordingly realize all the method steps realized by the user terminal in the above method embodiments, and can achieve the same technical effects, and the same parts and beneficial effects as those in the method embodiments in this embodiment will not be described here.

[0143] 8 is a schematic diagram of a configuration of a relay user terminal provided by an embodiment of the present disclosure, where the relay user terminal is a target relay user terminal, and as shown in FIG. 8, the target relay user terminal includes a transceiver 801, a processor 802, and a memory 803.

[0144] The memory 803 is used to store computer programs.

[0145] The transceiver 801 is used to transmit and receive data under the control of the processor 802 .

[0146] 8, the bus architecture may include any number of interconnected buses and bridges to which various circuits, such as one or more processors represented by processor 802 and memory represented by memory 803, are linked. The bus architecture may also link various other circuits, such as peripherals, regulators, and power management circuits, which are known in the art and will not be further described herein. The bus interface provides an interface. The transceiver 801 may be multiple elements, including a transmitter and a receiver, and provides a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical cables, and the like. The processor 802 is responsible for managing the bus architecture and normal processing, and the memory 803 may store data used by the processor 802 in performing operations.

[0148] In alternative embodiments, the processor 802 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD), and the processor may employ a multi-core architecture.

[0149] The processor 802 is used to execute any of the user terminal access methods for the target relay user terminal provided by the embodiments of the present disclosure in accordance with the executable instructions obtained by running a computer program stored in the memory 803. The processor 802 and the memory 803 may be physically separated.

[0150] Specifically, the processor 802 is used to read the computer program stored in the memory 803 and perform the following operations: receiving a connection establishment request message sent by a user terminal via a sidelink communication interface, the connection establishment request message including an identity identifier of the user terminal, the identity identifier of the user terminal being A remote user terminal or a relay user terminal It is used to indicate.

[0151] In an alternative embodiment, the processor 802 is further adapted to perform the following operations: Based on the identity identifier of the user terminal, a target operation corresponding to the identity identifier of the user terminal is performed.

[0152] In an alternative embodiment, the connection establishment request message is a PC5 connection establishment request message, and the PC5 connection establishment request message includes PC5-S signaling and / or PC5-RRC signaling.

[0153] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0154] In an optional embodiment, performing a target operation corresponding to the identity identifier of the user terminal based on the identity identifier of the user terminal includes: The user terminal is a remote user terminal is If so, establishing a sidelink communication connection with the user terminal via the sidelink communication interface.

[0155] In an optional embodiment, performing a target operation corresponding to the identity identifier of the user terminal based on the identity identifier of the user terminal includes: The user terminal is a relay user terminal is if it is determined that the user terminal is a target relay user terminal, establishing a sidelink communication interface connection between the user terminal and the target relay user terminal, and sending an indication message to at least one device among the target network device, the target remote user terminal, and the previous-hop relay user terminal, and / or establishing a sidelink communication interface connection between the user terminal and the target relay user terminal, and updating its own routing table; instructions message is used to instruct the target network device, the target remote user terminal, or the previous-hop relay user terminal to update the corresponding routing table.

[0156] In an alternative embodiment, the user terminal is a relay user terminal. isIn this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0157] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0158] In an alternative embodiment, the processor 802 is further adapted to perform the following operations: Based on the relay capability indication information of the user terminal included in the connection establishment request message, a relay operation mode to be used after the user terminal accesses the target relay user terminal is determined.

[0159] In an alternative embodiment, the processor 802 is further adapted to perform the following operations: sending a response message to the user terminal in response to the connection establishment request message; The response message includes indication information for indicating the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0160] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0161] It is necessary to explain here that the above relay user terminal provided by the present disclosure can accordingly implement all the method steps implemented by the target relay user terminal in the above method embodiment, and can achieve the same technical effects, and the same parts and beneficial effects as those in the method embodiment in this embodiment will not be described here.

[0162] 9 is a schematic diagram of a configuration of a user terminal provided by an embodiment of the present disclosure. As shown in FIG. 9, the user terminal includes a transceiver 901, a processor 902, and a memory 903.

[0163] The memory 903 is used to store computer programs.

[0164] The transceiver 901 is used to transmit and receive data under the control of the processor 902 .

[0165] 9, the bus architecture may include any number of interconnected buses and bridges to which various circuits, such as one or more processors represented by processor 902 and memory represented by memory 903, are linked. The bus architecture may also link various other circuits, such as peripherals, regulators, and power management circuits, which are known in the art and will not be further described herein. The bus interface provides an interface. The transceiver 901 may be multiple elements including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical cables, and the like. The processor 902 is responsible for managing the bus architecture and normal processing, and the memory 903 may store data used by the processor 902 in performing operations.

[0166] The processor 902 is responsible for managing the bus architecture and normal processing, and the memory 903 may store data used by the processor 902 in performing operations.

[0167] In alternative embodiments, the processor 902 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD), and the processor may employ a multi-core architecture.

[0168] The processor 902 is used to execute any of the user terminal access methods for the target relay user terminal provided by the embodiments of the present disclosure in accordance with the executable instructions obtained by running a computer program stored in the memory 903. The processor 902 and the memory 903 may be physically separated.

[0169] Specifically, the processor 902 is used to read the computer program stored in the memory 903 and perform the following operations: Send a connection establishment request message to the target relay user terminal via the sidelink communication interface, the connection establishment request message including an identity identifier of the user terminal, and the identity identifier of the user terminal is A remote user terminal or a relay user terminal It is used to indicate.

[0170] In an alternative embodiment, the processor 902 is further adapted to perform the following operations: A target relay user terminal is determined based on the identity of the user terminal.

[0171] In an alternative embodiment, determining the target relay user terminal based on the identity of the user terminal comprises: The user terminal If it is a remote user terminal selecting one relay user terminal as a target relay user terminal among the relay user terminals that satisfy a first preset condition; or The user terminal is a relay user terminal is selecting N relay user terminals as target relay user terminals among the relay user terminals that satisfy the second preset condition; N is an integer of 1 or greater.

[0172] In an optional embodiment, the second preset condition is: The relay operation modes supported by the user terminal include the relay operation mode currently used by the target relay user terminal; the channel quality of the sidelink communication interface between the user terminal and the relay user terminal is higher than a preset threshold; Contains at least one of the following:

[0173] In an alternative embodiment, the connection establishment request message includes indication information, and the user terminal determines whether or not the indication information is valid based on the value of the indication information. A remote user terminal or a relay user terminal indicates, Or, the connection establishment request message optionally includes indication information, and the user terminal determines whether the indication information is included or not. A remote user terminal or a relay user terminal Shows.

[0174] In an alternative embodiment, the user terminal is a relay user terminal. is In this case, the connection establishment request message further includes relay capability indication information of the user terminal and / or the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0175] In an alternative embodiment, the processor 902 is further adapted to perform the following operations: receiving a relay discovery message broadcast from a target relay user terminal, the relay discovery message including a relay operation mode of the target relay user terminal; Based on the relay operation mode of the target relay user terminal, determine the relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0176] In an alternative embodiment, the processor 902 is further adapted to perform the following operations: A response message corresponding to the connection establishment request message sent from the target relay user terminal is received, and the response message includes indication information for indicating a relay operation mode to be used after the user terminal accesses the target relay user terminal.

[0177] In an alternative embodiment, the relay operation mode is: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0178] In an alternative embodiment, the relay capability indication information comprises: Layer 2 relay, Layer 3 relay, Layer 2 relay from user terminals to network devices (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay) Layer 3 U2N relay from user terminals to network devices Layer 3 user terminal to user terminal relay (L3 U2U relay) Contains at least one of the following:

[0179] It is necessary to explain here that the above-mentioned user terminal provided by the present disclosure can accordingly implement all the method steps implemented by the user terminal in the above-mentioned method embodiments, and can achieve the same technical effects, and the same parts and beneficial effects as those in the method embodiments in this embodiment will not be described here.

[0180] The division of units in the embodiments of the present disclosure is a rough outline and merely represents a logical functional division, and different division methods may be used in actual implementation. Furthermore, the functional units in each embodiment of the present disclosure may be integrated into a single processing unit, each unit may exist physically independently, or two or more units may be integrated into a single unit. The integrated units may be implemented in the form of hardware or software functional units.

[0181] The above-mentioned integrated units can be implemented as software functional units and stored in a processor-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present disclosure can be essentially embodied in a software product, or a portion of the technical solution, or all or a portion of the technical solution, and the computer software product is stored in a storage medium containing some instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) or a processor to execute all or a portion of the steps of the method of each embodiment of the present disclosure. Meanwhile, the aforementioned storage medium includes various media capable of storing program code, such as a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0182] target At the relay user terminal side, the embodiment of the present disclosure provides a processor-readable storage medium, which stores a computer program, and the computer program enables the processor to implement all the method steps implemented by the target relay user terminal in the above method embodiment, and achieve the same technical effects, and the same parts and beneficial effects of the embodiment as those of the method embodiment will not be described again.

[0183] On the user terminal side, the embodiment of the present disclosure provides a processor-readable storage medium, which stores a computer program, and the computer program enables the processor to implement all the method steps implemented by the user terminal in the above method embodiment, and achieve the same technical effects, and the same parts and beneficial effects of the embodiment as those of the method embodiment will not be described here.

[0184] Here, the processor-readable storage medium may be any available medium or data storage device accessible by a processor, including, but not limited to, magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical memory (e.g., CD, DVD, BD, HVD), and semiconductor memory (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state hard disk (SSD)), etc.

[0185] target At the relay user terminal side, one embodiment of the present disclosure comprises a computer program including instructions: M It is further provided that the computer program is stored in a storage medium, at least one processor can read the computer program from the storage medium, and when the at least one processor executes the computer program, it can implement all the method steps implemented by the target relay user terminal in the above method embodiments, and can achieve the same technical effects, and the same parts and beneficial effects of the present embodiment as those of the method embodiments will not be described here.

[0186] On the user terminal side, one embodiment of the present disclosure includes a computer program including instructions. MIt is further provided that the computer program is stored in a storage medium, at least one processor can read the computer program from the storage medium, and the at least one processor can implement all the method steps implemented by the user terminal in the above method embodiments when executing the computer program, and can achieve the same technical effects, and the same parts and beneficial effects of the method embodiments in this embodiment will not be described here.

[0187] The embodiments of the present disclosure also provide a communication system including a target relay user terminal and a user terminal. .Ta The target relay user terminal can implement all the method steps performed by the target relay user terminal side in the above method embodiments, and can achieve the same technical effects. The user terminal can implement all the method steps performed by the user terminal side in the above method embodiments, and can achieve the same technical effects. The same parts and beneficial effects of this embodiment as those of the method embodiments will not be described here.

[0188] Those skilled in the art will appreciate that embodiments of the present disclosure may be provided as a method, a system, or a computer program product. Accordingly, the present disclosure may employ examples of entirely hardware embodiments, entirely software embodiments, or embodiments that combine software and hardware aspects. The present disclosure may also employ examples of computer program products embodied in one or more computer-usable storage media (including, but not limited to, disk memory, optical memory, etc.) that contain computer-usable program code.

[0189] The present disclosure will be described with reference to schematic and / or block diagrams of signaling interactions of methods, apparatuses, and computer program products according to embodiments of the present disclosure. It should be understood that each flow and / or block in the signaling interaction schematic and / or block diagrams, and combinations of flows and / or blocks in the signaling interaction schematic and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine such that the instructions, executed by the processor of the computer or other programmable data processing device, generate means for implementing the functions specified in one or more flows and / or one or more blocks in the signaling interaction schematic and / or block diagrams.

[0190] These processor-executable instructions may also be stored in a processor-readable memory that can cause a computer or other programmable data processing apparatus to operate in a particular manner to produce an article of manufacture that includes an instruction apparatus that implements the functionality specified in one or more flows of the signaling interaction schematic and / or one or more blocks of the block diagram.

[0191] These processor-executable instructions may also be loaded into a computer or other programmable data processing device to perform a series of operational steps on the computer or other programmable device to generate a computer-implemented process, whereby the instructions executing on the computer or other programmable device provide steps for implementing the functions specified in one or more flows of the signaling interaction schematic diagram and / or one or more blocks of the block diagram.

[0192] Clearly, those skilled in the art will appreciate that the present disclosure Example ofVarious modifications and variations of the present disclosure can be made without departing from the scope thereof. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure also intends to include these modifications and variations.

[0193] This disclosure claims priority to a Chinese patent application entitled "User terminal access method, device, user terminal and storage medium," filed with the China Patent Office on August 10, 2021, bearing application number 202110914994.8, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0194] 600 User terminal access device 601 Receiver Module 602 Processing Module 603 Decision Module 604 Transmitting Module 700 User terminal access device 701 Transmitting Module 702 Decision Module 703 Receiver Module 801 Transceiver 802 processor 803 memory 901 Transceiver 902 processor 903 Memory

Claims

1. A user terminal access method applied to a target relay user terminal, comprising: receiving a connection establishment request message transmitted by a user terminal via a sidelink communication interface; the connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is used to indicate that the user terminal operates as a remote user terminal or a relay user terminal after accessing the target relay user terminal; A user terminal access method comprising:

2. Further comprising: performing a target operation corresponding to the identity identifier of the user terminal according to the identity identifier of the user terminal; The step of performing a target operation corresponding to the identity identifier of the user terminal according to the identity identifier of the user terminal includes: if it is determined that the user terminal operates as a remote user terminal, establishing a sidelink communication interface connection with the user terminal; if it is determined that the user terminal acts as a relay user terminal, establishing a sidelink communication interface connection with the user terminal and sending an indication message to at least one device among a target network device, a target remote user terminal, and a previous-hop relay user terminal, and / or establishing a sidelink communication interface connection with the user terminal and updating its own routing table; The instruction message is used to instruct the target network device, the target remote user terminal, or the previous-hop relay user terminal to update corresponding routing tables; 2. The method of claim 1 .

3. The connection establishment request message includes indication information, and a value of the indication information indicates whether the user terminal operates as a remote user terminal or a relay user terminal; or the connection establishment request message optionally includes indication information, and whether the indication information is included indicates whether the user terminal operates as a remote user terminal or a relay user terminal.

2. The method of claim 1 .

4. If the user terminal acts as a relay user terminal, the connection establishment request message further includes relay capability indication information of the user terminal and / or a relay operation mode to be used after the user terminal accesses the target relay user terminal; The relay capability indication information and the relay operation mode are: Layer 2 relay L2 relay, Layer 3 relay L3 relay, Layer 2 relay from user terminal to network device (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay), Layer 3 relay from user terminal to network device L3 U2N relay, Layer 3 relay from user terminal to user terminal (U2U relay) at least one of The method according to any one of claims 1 to 3.

5. determining a relay operation mode to be used after the user terminal accesses the target relay user terminal based on relay capability indication information of the user terminal included in the connection establishment request message; and / or sending a response message to the user terminal corresponding to the connection establishment request message, the response message including indication information for indicating a relay operation mode to be used after the user terminal accesses the target relay user terminal; 5. The method of claim 4.

6. A user terminal access method applied to a user terminal, comprising: sending a connection establishment request message to a target relay user terminal via a sidelink communication interface; the connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is used to indicate that the user terminal operates as a remote user terminal or a relay user terminal after accessing the target relay user terminal; A user terminal access method comprising:

7. before sending a connection establishment request message to the target relay user terminal via the sidelink communication interface; determining a target relay user terminal based on the identity of the user terminal; 7. The method of claim 6.

8. determining a target relay user terminal based on the identity of the user terminal, When the user terminal acts as a remote user terminal, selecting one relay user terminal as a target relay user terminal among the relay user terminals that satisfy a first preset condition; or If the user terminal operates as a relay user terminal, selecting N relay user terminals as target relay user terminals among the relay user terminals that satisfy a second preset condition; N is an integer of 1 or greater, The second preset condition is The relay operation modes supported by the user terminal include a relay operation mode currently used by a target relay user terminal; the channel quality of a sidelink communication interface between the user terminal and a relay user terminal is higher than a preset threshold; at least one of 8. The method of claim 7.

9. The connection establishment request message includes indication information, and a value of the indication information indicates whether the user terminal operates as a remote user terminal or a relay user terminal; or the connection establishment request message optionally includes indication information, and whether the indication information is included indicates whether the user terminal operates as a remote user terminal or a relay user terminal.

7. The method of claim 6.

10. If the user terminal acts as a relay user terminal, the connection establishment request message further includes relay capability indication information of the user terminal and / or a relay operation mode to be used after the user terminal accesses the target relay user terminal; The relay capability indication information and the relay operation mode are: Layer 2 relay L2 relay, Layer 3 relay L3 relay, Layer 2 relay from user terminal to network device (L2 U2N relay) Layer 2 relay from user terminal to user terminal (L2 U2U relay), Layer 3 relay from user terminal to network device L3 U2N relay, Layer 3 relay from user terminal to user terminal (U2U relay) Contains at least one of The method according to any one of claims 6 to 9.

11. receiving a relay discovery message broadcast from the target relay user terminal, the message including a relay operation mode of the target relay user terminal; and determining, based on a relay operation mode of the target relay user terminal, a relay operation mode to be used after the user terminal accesses the target relay user terminal.

11. The method of claim 10.

12. After determining a relay operation mode to be used after the user terminal accesses the target relay user terminal, receiving a response message corresponding to the connection establishment request message sent from the target relay user terminal; the response message includes indication information for indicating a relay operation mode to be used after the user terminal accesses the target relay user terminal; 12. The method of claim 11 .

13. A user terminal access device applied to a target relay user terminal, comprising: a receiving module adapted to receive a connection establishment request message transmitted by a user terminal via a sidelink communication interface; the connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is used to indicate that the user terminal operates as a remote user terminal or a relay user terminal after accessing the target relay user terminal; A user terminal access device comprising:

14. A user terminal access device applied to a user terminal, comprising: a transmitting module adapted to transmit a connection establishment request message to a target relay user terminal via a sidelink communication interface; the connection establishment request message includes an identity identifier of the user terminal, and the identity identifier of the user terminal is used to indicate that the user terminal operates as a remote user terminal or a relay user terminal after accessing the target relay user terminal; A user terminal access device comprising:

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