Connection release method, device, storage medium and chip

Abstract

The present disclosure relates to a connection release method, device, storage medium and chip. The method comprises: a first terminal can release a first sidelink connection established by the first terminal through a relay terminal and a second terminal in response to a trigger connection release event; wherein the connection release event is used to indicate to release a second sidelink connection between the first terminal and the relay terminal. In this way, in the case where the first terminal determines to release the second sidelink connection between the first terminal and the relay terminal, the first sidelink connection between the first terminal and the second terminal can be released, so that the first sidelink connection that cannot continue to communicate can be released in time, and the resource occupation of the first terminal is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a connection release method, device, storage medium, and chip. Background Art

[0002] With the development of wireless communication technology, in order to achieve direct communication between terminals, 3GPP (3rd Generation Partnership Project) defined the sidelink (which can be called a direct link or sidelink) communication method. For example, a typical application scenario of sidelink communication is the vehicle-to-everything (V2X). In the vehicle network, each vehicle can be used as a terminal, and terminals can communicate with each other through a direct link sidelink, for example, by transmitting information through a direct connection, thereby effectively reducing communication latency.

[0003] When two terminals communicating over a long distance can communicate via a relay terminal (e.g., a relay UE), this communication method is called U2U relay communication. In U2U relay communication, the two terminals communicating via the relay terminal are referred to as remote terminals or remote UEs. In related technologies, the remote terminal's sidelink connection can be delayed, occupying terminal resources and affecting data transmission efficiency. Summary of the Invention

[0004] In order to overcome the above-mentioned problems existing in the related art, the present disclosure provides a connection release method, device, storage medium and chip.

[0005] According to a first aspect of an embodiment of the present disclosure, a connection release method is provided, applied to a first terminal, the method including:

[0006] In response to triggering a connection release event, releasing a first direct link sidelink connection established between the first terminal and the second terminal through the relay terminal; the connection release event is used to instruct the release of a second sidelink connection between the first terminal and the relay terminal.

[0007] In some embodiments, the method further comprises:

[0008] The second sidelink connection between the first terminal and the relay terminal is released.

[0009] In some embodiments, the releasing the second sidelink connection between the first terminal and the relay terminal includes:

[0010] The access layer of the first terminal notifies the higher layer of the first terminal to release the second sidelink connection.

[0011] In some embodiments, releasing the first direct link sidelink connection established between the first terminal and the second terminal via the relay terminal includes:

[0012] A first release parameter is transmitted to a higher layer of the first terminal through the access layer of the first terminal; the first release parameter is used to notify the higher layer to release the first sidelink connection.

[0013] In some embodiments, the first release parameter includes a preset release reason parameter, and the preset release reason parameter is used to indicate that the second sidelink connection between the first terminal and the relay terminal is interrupted.

[0014] In some embodiments, the connection release event includes:

[0015] The access layer receives a target release indication from the higher layer; the target release indication is used to instruct the access layer to release the second sidelink connection.

[0016] In some embodiments, the connection release event includes:

[0017] A sidelink wireless link failure occurs in the second sidelink connection between the first terminal and the relay terminal.

[0018] In some embodiments, the connection release event includes:

[0019] A target indication sent by the relay terminal is received; the target indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is interrupted.

[0020] In some embodiments, the target indication includes a first indication, where the first indication is used to indicate that a sidelink radio link failure occurs in a third sidelink connection between the relay terminal and the second terminal.

[0021] In some embodiments, the target indication includes a second indication, where the second indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is released.

[0022] In some embodiments, there are multiple second terminals, and the connection release event includes:

[0023] A target indication sent by the relay terminal is received, and according to the target indication, it is determined that the sidelink connections between the plurality of second terminals that maintain sidelink connections with the first terminal through the relay terminal and the relay terminal are all interrupted.

[0024] According to a second aspect of an embodiment of the present disclosure, a connection release method is provided, which is applied to a relay terminal. The method includes:

[0025] In a case where it is determined that the third direct link Sidelink connection between the relay terminal and the second terminal is interrupted, a target indication is sent to the first terminal, so that the first terminal, in response to receiving the target indication, releases the first direct link Sidelink connection established between the first terminal and the second terminal via the relay terminal, wherein the target indication is used to indicate that the third Sidelink connection between the relay terminal and the second terminal is interrupted.

[0026] In some embodiments, the target indication includes a first indication, where the first indication is used to indicate that a sidelink radio link failure occurs in a third sidelink connection between the relay terminal and the second terminal.

[0027] In some embodiments, the target indication includes a second indication, where the second indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is released.

[0028] According to a third aspect of an embodiment of the present disclosure, a connection release device is provided, applied to a first terminal, the device comprising:

[0029] The first release module is configured to release the first direct link sidelink connection established between the first terminal and the second terminal through the relay terminal in response to triggering a connection release event; the connection release event is used to indicate the release of the second sidelink connection between the first terminal and the relay terminal.

[0030] In some embodiments, the apparatus further comprises:

[0031] The second releasing module is configured to release the second sidelink connection between the first terminal and the relay terminal.

[0032] In some embodiments, the second releasing module is configured to notify a higher layer of the first terminal through an access layer of the first terminal to release the second sidelink connection.

[0033] In some embodiments, the first release module is configured to transmit, to a higher layer of the first terminal, a first release parameter through an access layer of the first terminal; the first release parameter is used to inform the higher layer to release the first sidelink connection.

[0034] In some embodiments, the first release parameter comprises a preset release cause parameter, and the preset release cause parameter is used to indicate that the second sidelink connection between the first terminal and the relay terminal is interrupted.

[0035] In some embodiments, the connection release event comprises:

[0036] the access layer receives a target release indication of the higher layer; the target release indication is used to instruct the access layer to release the second sidelink connection.

[0037] In some embodiments, the connection release event comprises:

[0038] a sidelink radio link failure occurs in the second sidelink connection between the first terminal and the relay terminal.

[0039] In some embodiments, the connection release event comprises:

[0040] a target indication sent by the relay terminal is received; the target indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is interrupted.

[0041] In some embodiments, the target indication comprises a first indication, and the first indication is used to indicate that a sidelink radio link failure occurs in the third sidelink connection between the relay terminal and the second terminal.

[0042] In some embodiments, the target indication comprises a second indication, and the second indication is used to indicate that the third sidelink connection between the relay terminal and the second terminal is released.

[0043] In some embodiments, the second terminal is multiple, and the connection release event comprises:

[0044] a target indication sent by the relay terminal is received, and it is determined according to the target indication that sidelink connections between multiple second terminals and the relay terminal, which maintain sidelink connections with the first terminal through the relay terminal, are all interrupted.

[0045] According to a fourth aspect of the embodiments of the present disclosure, a connection release apparatus is provided, applied to a relay terminal, and the apparatus comprises:

[0046] The first sending module is configured to, upon determining that a third direct link Sidelink connection between the relay terminal and the second terminal is interrupted, send a target indication to the first terminal, so that the first terminal, in response to receiving the target indication, releases the first direct link Sidelink connection established between the first terminal and the second terminal via the relay terminal, wherein the target indication is used to indicate that the third Sidelink connection between the relay terminal and the second terminal is interrupted.

[0047] In some embodiments, the target indication includes a first indication, where the first indication is used to indicate that a sidelink radio link failure occurs in a third sidelink connection between the relay terminal and the second terminal.

[0048] In some embodiments, the target indication includes a second indication, where the second indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is released.

[0049] According to a fifth aspect of an embodiment of the present disclosure, there is provided a connection release device, comprising:

[0050] processor;

[0051] a memory for storing processor-executable instructions;

[0052] The processor is configured to execute the steps of the connection release method provided in the first aspect of the present disclosure.

[0053] According to a sixth aspect of an embodiment of the present disclosure, there is provided a connection release device, comprising:

[0054] processor;

[0055] a memory for storing processor-executable instructions;

[0056] The processor is configured to execute the steps of the connection release method provided in the second aspect of the present disclosure.

[0057] According to a seventh aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the steps of the connection release method provided in the first aspect of the present disclosure are implemented.

[0058] According to an eighth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the steps of the connection release method provided in the second aspect of the present disclosure are implemented.

[0059] According to a ninth aspect of the embodiments of the present disclosure, a chip is provided, comprising: a processor and an interface; the processor is configured to read instructions to execute the steps of the connection release method provided in the first aspect of the present disclosure,

[0060] According to a tenth aspect of an embodiment of the present disclosure, a chip is provided, comprising: a processor and an interface; the processor is configured to read instructions to execute the steps of the connection release method provided in the second aspect of the present disclosure.

[0061] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: a first terminal may release a first direct link sidelink connection established between the first terminal and the second terminal via a relay terminal in response to triggering a connection release event; wherein the connection release event is used to indicate the release of a second sidelink connection between the first terminal and the relay terminal. In this way, when the first terminal determines to release the second sidelink connection between the first terminal and the relay terminal, the first sidelink connection between the first terminal and the second terminal may be released, thereby promptly releasing the first sidelink connection that is unable to continue communication, reducing the resource usage of the first terminal, and the first terminal may more quickly establish a new connection with the second terminal based on business needs, without having to wait for the release of the original connection, thereby avoiding the problem of data transmission delay and improving data transmission efficiency.

[0062] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0064] Figure 1 The diagram is a schematic diagram of a communication system according to an exemplary embodiment.

[0065] Figure 2 The figure is a flowchart of a connection release method according to an exemplary embodiment.

[0066] Figure 3 The figure is a flowchart of a connection release method according to an exemplary embodiment.

[0067] Figure 4 The figure is a flowchart of a connection release method according to an exemplary embodiment.

[0068] Figure 5 The figure is a flowchart of a connection release method according to an exemplary embodiment.

[0069] Figure 6The figure is a block diagram showing a connection releasing device according to an exemplary embodiment.

[0070] Figure 7 The figure is a block diagram showing a connection releasing device according to an exemplary embodiment.

[0071] Figure 8 The figure is a block diagram showing a connection releasing device according to an exemplary embodiment.

[0072] Figure 9 The figure is a block diagram showing a connection releasing device according to an exemplary embodiment. DETAILED DESCRIPTION

[0073] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0074] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the corresponding data protection laws and policies of the country where they are located and with the authorization given by the owner of the corresponding device.

[0075] In the description of the present disclosure, terms such as "first" and "second" are used to distinguish similar objects and are not necessarily to be understood as implying a specific order or precedence. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements unless otherwise indicated.

[0076] In the description of the present disclosure, unless otherwise specified, "multiple" means two or more than two, and other quantifiers are similar thereto; "at least one item(s)", "one item(s) or multiple items(s)" or similar expressions refer to any combination of these items(s), including any combination of single items(s) or plural items(s). For example, at least one item(s) a can represent any number of a's; for another example, one item(s) or multiple items(s) among a, b and c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple; "and / or" is a type of association relationship that describes associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0077] Although operations or steps are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be understood as requiring that these operations or steps be performed in the particular order shown or in a serial order, or that all of the operations or steps shown be performed to obtain a desired result. In the embodiments of the present disclosure, these operations or steps may be performed serially; these operations or steps may also be performed in parallel; or some of these operations or steps may be performed.

[0078] The following first introduces the implementation environment of the embodiments of the present disclosure.

[0079] The technical solutions of the embodiments of the present disclosure can be applied to various communication systems. The communication system may include one or more of a 4G (the 4th Generation, fourth generation) communication system, a 5G (the 5th Generation, fifth generation) communication system, and other future wireless communication systems (such as 6G). The communication system may also include a land public mobile communication network (Public Land Mobile Network, PLMN) network, a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT) communication system, a vehicle-to-everything (V2X) communication system, or one or more of other communication systems.

[0080] Figure 1 is a schematic diagram of a communication system according to an exemplary embodiment. Figure 1 As shown, the communication system may include a terminal device 150 and a network device 160. The communication system may be used to support 4G network access technology, such as Long Term Evolution (LTE) access technology, or 5G network access technology, such as New Radio Access Technology (New RAT), or other future wireless communication technologies. It should be noted that in the communication system, the number of network devices and terminal devices may be one or more. Figure 1 The number of network devices and terminal devices in the communication system shown is only an adaptive example and is not limited in this disclosure.

[0081] Figure 1The network device in the embodiment can be used to support terminal access. For example, the network device can be an evolved base station (eNB or eNodeB) in LTE; the network device can also be the next generation base station (gNB or gNodeB) in a 5G network; the network device can also be a radio access network (NG-RAN) device in a 5G network; the network device can also be a base station, a broadband network service gateway (BNG), an aggregation switch or a non-3GPP (3rd Generation Partnership Project) access device in a future evolved public land mobile network (PLMN). Optionally, the network devices in the embodiments of the present disclosure may include various forms of base stations, such as: macro base stations, micro base stations (also known as small stations), relay stations, access points, 5G base stations or future base stations, satellites, transmission points (Transmitting and Receiving Point, TRP), transmission points (Transmitting Point, TP), mobile switching centers, and devices to devices (Device-to-Device, D2D), machine-to-machine (Machine-to-Machine, M2M), Internet of Things (Internet of Things, IoT), vehicle-to-everything (V2X) or other devices that perform base station functions in communications, etc., and the embodiments of the present disclosure do not specifically limit this. For the convenience of description, in all embodiments of the present disclosure, the devices that provide wireless communication functions for terminal devices are collectively referred to as network devices or base stations.

[0082] Figure 1The terminal device in the present disclosure may be an electronic device that provides voice or data connectivity. For example, the terminal device may also be referred to as user equipment (UE), subscriber unit (Subscriber Unit), mobile station (Mobile Station), station (Station), terminal, etc. For example, the terminal device may include a smartphone, smart wearable device, smart speaker, smart tablet, wireless modem, wireless local loop (WLL) station, PDA (Personal Digital Assistant), CPE (Customer Premise Equipment), etc. With the development of wireless communication technology, devices that can access a communication system, can communicate with network devices of a communication system, can communicate with other objects through a communication system, or can directly communicate between two or more devices can all be terminal devices in the embodiments of the present disclosure; for example, terminals and cars in smart transportation, household appliances in smart homes, power meter reading instruments, voltage monitoring instruments, environmental monitoring instruments in smart grids, video monitoring instruments in smart security networks, cash registers, etc. In the embodiments of the present disclosure, the terminal device can communicate with network devices. Multiple terminal devices can also communicate with each other. The terminal device can be static or mobile, and this disclosure does not limit this.

[0083] In some embodiments, as Figure 1As shown, the terminal device 150 may include a first terminal 151, a second terminal 152 and a relay terminal 153, wherein the first terminal 151 and the second terminal 152 may not be directly linked, but communicate through the relay terminal 153, and the relay terminal 153 may provide a relay function for the communication between the first terminal 151 and the second terminal 152, such as forwarding communication data. This communication method can be called U2U (UE to UE, terminal to terminal) relay communication, wherein the first terminal and the second terminal can be called remote terminals or remote UEs (remote UE). In U2U relay communication, the communication method between multiple terminals may include any one or more of unicast, multicast or broadcast. For example, the first terminal can send sidelink data to the relay terminal in a unicast manner, and then the relay terminal can also forward the sidelink data to the second terminal in a unicast manner. At this time, the first terminal can be called Source remote UE, the relay terminal can be called relay UE, and the second terminal can be called Target remote UE. For another example, the second terminal can send sidelink data to the relay terminal via unicast, and then the relay terminal can also forward the sidelink data to the first terminal via unicast. At this time, the second terminal can be called Source remote UE, the relay terminal can be called relay UE, and the first terminal can be called Target remote UE.

[0084] It should be noted that when the first terminal maintains a unicast connection with the second terminal through the relay terminal, it can be called a sidelink indirect link, and when the first terminal maintains a unicast connection with the second terminal directly, it can be called a sidelink direct link.

[0085] In this embodiment, the first terminal can be connected to the network device, or it may not be directly connected to the network device, but it may be connected to the network device through the relay terminal 153 or other terminals that provide relay functions; similarly, the second terminal can be connected to the network device, or it may not be directly connected to the network device, but it may be connected to the network device through the relay terminal 153 or other terminals that provide relay functions. This disclosure does not impose any restrictions on this.

[0086] It should be further noted that, for a physical terminal device, in the case of providing relay function, the physical terminal device can act as a relay terminal; in the case of communicating data with other terminal devices through other relay terminal devices, the physical terminal device can act as the first terminal or the second terminal. That is, the same physical terminal device can act as a relay terminal in one U2U link, as a first terminal (e.g., a data sending terminal) in another U2U link, and as a second terminal (e.g., a data receiving terminal) in another U2U link. Of course, a physical terminal device can only provide relay function (i.e., only act as the relay terminal) or only provide normal sidelink communication function (i.e., only act as the first terminal or the second terminal), and the present disclosure does not limit this.

[0087] In some embodiments, in order to implement U2U communication, the first terminal can establish two connections, including: a first sidelink connection established by the first terminal through the relay terminal and the second terminal, and a second sidelink connection between the first terminal and the relay terminal. Wherein, the sidelink connection can be a PC5-RRC (Radio Resource Control) connection established through a PC5 interface, in the case of a unicast connection, if one or more of the following RLF (Radio Link Failure) events occur, the sidelink radio link failure can be triggered:

[0088] RLF event one, the sidelink RLC entity reaches the maximum number of transmissions to the target terminal.

[0089] For example, the RRC receives a notification from the sidelink RLC entity that the sidelink RLC entity reaches the maximum number of transmissions to the target terminal, which can be the opposite terminal of the sidelink connection, such as the second terminal or the relay terminal.

[0090] RLF event two, T400 timer timeout.

[0091] The T400 timer can be started by the first terminal after transmitting RRCReconfigurationSidelink, and the duration of the T400 timer can be a preset duration.

[0092] RLF event three, the feedback of the target terminal is continuously lost for a maximum number of times.

[0093] For example, the RRC receives a notification from a sidelink MAC (Medium Access Control) entity that the number of consecutive feedback losses of the target terminal reaches a maximum value, which can be the number of consecutive HARQ DTXs. Similarly, the target terminal can be the opposite terminal of the sidelink connection, such as the second terminal or the relay terminal.

[0094] RLF event four, integrity detection failure of a sidelink signaling bearer.

[0095] For example, the RRC receives a notification from a sidelink PDCP (Packet Data Convergence Protocol) entity that the integrity detection of the SL-SRB2 or the SL-SRB3 fails.

[0096] After triggering the sidelink radio link failure, the first terminal can release the sidelink connection in which the sidelink radio link failure occurs.

[0097] In related technologies, if the sidelink connection between the first terminal and the relay terminal is released, the first terminal cannot continue to communicate with the second terminal through the relay terminal. However, the sidelink connection between the first terminal and the second terminal is not actively released and is still maintained, which occupies the resources of the first terminal and causes the first terminal to be unable to establish a new connection with the second terminal, resulting in data transmission delay.

[0098] To solve the above problems, the present disclosure provides a connection release method, device, storage medium and chip.

[0099] Figure 2 A connection release method according to an exemplary embodiment is shown. The method can be applied to the first terminal in the above-mentioned communication system. As shown in Figure 2 The method can include:

[0100] S201, the first terminal releases the first sidelink connection established by the first terminal through the relay terminal and the second terminal in response to triggering a connection release event.

[0101] The connection release event is used to indicate the release of the second sidelink connection between the first terminal and the relay terminal.

[0102] For example, a first terminal and a second terminal can perform U2U communication via a relay terminal. To perform U2U communication, the first terminal can establish a second Sidelink connection with the relay terminal, and then establish a first Sidelink connection with the second terminal via the relay terminal. In this way, when a connection release event instructing to release the second Sidelink connection is triggered, the first Sidelink connection can be released, thereby avoiding resource waste caused by the first terminal maintaining an invalid first Sidelink connection after the second Sidelink connection is released.

[0103] It should be noted that both the first sidelink connection and the second sidelink connection may be PC5-RRC connections.

[0104] In some embodiments, in response to triggering a connection release event, the first terminal may first determine a first direct link sidelink connection established between the first terminal and the second terminal via the relay terminal, and then release the first sidelink connection.

[0105] In some embodiments, the second terminal may be one or more. For example, a first terminal may perform U2U communication with multiple second terminals via the same relay terminal. In this case, in response to triggering a connection release event, the first terminal may determine multiple first Sidelink connections established between the first terminal and the multiple second terminals via the relay terminal, and release the first Sidelink connections. In other words, upon determining to release the second Sidelink connection between the first terminal and the relay terminal, the first terminal may release all of the multiple first Sidelink connections established via the relay terminal.

[0106] Using the above method, a first terminal can release a first direct link sidelink connection established between the first terminal and a second terminal via a relay terminal in response to triggering a connection release event; wherein the connection release event is used to instruct the release of a second sidelink connection between the first terminal and the relay terminal. In this way, when the first terminal determines to release the second sidelink connection between the first terminal and the relay terminal, the first sidelink connection between the first terminal and the second terminal can be released, thereby promptly releasing the first sidelink connection that is no longer able to communicate, reducing the resource usage of the first terminal. In addition, the first terminal can more quickly establish a new connection with the second terminal based on business needs, without having to wait for the release of the original connection, thereby avoiding data transmission delays and improving data transmission efficiency.

[0107] Figure 3 Another connection release method is shown according to an exemplary embodiment. Figure 3 As shown, the method may include:

[0108] S301: A first terminal triggers a connection release event.

[0109] The connection release event is used to instruct the release of the second sidelink connection between the first terminal and the relay terminal.

[0110] For example, the first terminal may trigger a connection release event when a connection release event occurs. For example, the first terminal may trigger a connection release event when receiving an instruction to release the second sidelink connection.

[0111] S302: The first terminal releases a first sidelink connection established between the first terminal and the second terminal via the relay terminal.

[0112] In some embodiments, in response to triggering a connection release event, the first terminal may first determine a first sidelink connection established between the first terminal and the second terminal via the relay terminal, and then release the first sidelink connection.

[0113] In some embodiments, the first terminal may first send a first connection release request message (Disconnect Request) to the second terminal, and upon receiving a first connection release response message (Disconnect Response) sent by the second terminal in response to the first connection release request, the resources related to the first sidelink connection may be released.

[0114] In other embodiments, the first terminal may first send a first connection release request message to the second terminal, and may also release resources related to the first sidelink connection if the first connection release response message sent by the second terminal in response to the first connection release request is not received within a preset time.

[0115] In some other embodiments, the first terminal may directly release resources related to the first sidelink connection.

[0116] S303: The first terminal releases the second sidelink connection between the first terminal and the relay terminal.

[0117] In some embodiments, the first terminal may first send a second connection release request message (Disconnect Request) to the relay terminal, and upon receiving a second connection release response message (Disconnect Response) sent by the relay terminal in response to the second connection release request, the resources related to the second sidelink connection may be released.

[0118] In other embodiments, the first terminal may first send a second connection release request message to the relay terminal, and may also release the resources related to the second sidelink connection if the first terminal does not receive a second connection release response message sent by the relay terminal in response to the second connection release request within a preset time.

[0119] In some other embodiments, the first terminal may directly release resources related to the second sidelink connection.

[0120] In this way, the first terminal can release both the first sidelink connection and the second sidelink connection to avoid resource waste.

[0121] In the embodiment of the present disclosure, the above steps S302 and S303 may be performed in any order. For example:

[0122] In some embodiments, the first terminal may first perform the step of releasing the first sidelink connection, and then perform the step of releasing the second sidelink connection.

[0123] In some other embodiments, the first terminal may first execute the step of releasing the second sidelink connection, and then execute the step of releasing the first sidelink connection.

[0124] In some other embodiments, the first terminal may simultaneously perform the steps of releasing the first sidelink connection and releasing the second sidelink connection.

[0125] For example, the access layer of the first terminal may notify the upper layer to release the first sidelink connection and the second sidelink connection at the same time.

[0126] In some further embodiments, the first terminal may first execute the step of releasing the first sidelink connection, and then execute the step of releasing the second sidelink connection when it is determined that the first sidelink connection is released.

[0127] It should be noted that, since the first sidelink connection is a connection established between the first terminal and the second terminal via the relay terminal, and communication requires the second sidelink connection, the step of releasing the first sidelink connection is first performed. At this time, a first connection release request message can also be sent to the second terminal via the relay terminal so that the second terminal also releases the sidelink connection with the first terminal. When it is determined that the first sidelink connection is released, the step of releasing the second sidelink connection is then performed. For example, the access layer of the first terminal can first notify the higher layer to release the first sidelink connection, and when it is determined that the first sidelink connection is released (for example, a first release success indication sent by the higher layer is received), it can then notify the higher layer to release the second sidelink connection.

[0128] In some embodiments of the present disclosure, the first terminal may include an access layer and an upper layer (the upper layer may also be called a non-access layer).

[0129] In the above step S302, the first terminal may notify an upper layer through the access layer to release the first sidelink connection.

[0130] For example, the first terminal may transmit a first release parameter to a higher layer through the access layer; the first release parameter is used to notify the higher layer to release the first sidelink connection. In response to receiving the first release parameter, the higher layer releases the first sidelink connection. For example, the higher layer may send a disconnect request message (Disconnect Request) to the second terminal and release resources related to the first sidelink connection.

[0131] There are multiple ways to transmit the first release parameter: for example, the access layer may send a first release message to the upper layer, and the first release parameter may be included in the first release message. In another example, the first release parameter may be a preset parameter in a memory, and the access layer may set the value of the first release parameter to a first preset value to notify the upper layer to release the first sidelink connection.

[0132] In some embodiments, the first release parameter may include a preset release reason parameter, and the preset release reason parameter is used to indicate that the second sidelink connection between the first terminal and the relay terminal is interrupted. For example, the preset release reason parameter may be relay link interruption.

[0133] It should be noted that the meaning of the second sidelink connection being interrupted may include: the second sidelink connection has been interrupted or is about to be interrupted. For example, if the first terminal has already released the second sidelink connection in response to triggering the connection release event before releasing the first sidelink connection, then it can be determined that the second sidelink connection has been interrupted. Conversely, if the first terminal has already triggered the connection release event and determined to release the second sidelink connection before releasing the first sidelink connection, but has not yet executed the step of releasing the first sidelink connection, then it can be determined that the second sidelink connection is about to be interrupted. Regardless of whether the second sidelink connection has been interrupted or is about to be interrupted, the preset release reason parameter can be used to indicate the interruption of the second sidelink connection.

[0134] Similarly, in the above step S303, the first terminal may also notify the higher layer through the access layer to release the second sidelink connection.

[0135] In this way, the first terminal can release the first sidelink link through the cooperation of the access layer and the upper layer.

[0136] In some embodiments of the present disclosure, the connection release event may include one or more of the following events:

[0137] Connection release event 1: The access layer of the first terminal receives a target release instruction from a higher layer.

[0138] The target release indication may be used to instruct the access layer to release the second sidelink connection.

[0139] For example, the first terminal may release the first sidelink connection upon receiving a target release indication from a higher layer.

[0140] For example, a first sidelink connection established between the first terminal and the second terminal via the relay terminal may be determined first, and then the first sidelink connection may be released.

[0141] In some embodiments, since the target release indication is sent by a higher layer, the access layer of the first terminal may no longer need to notify the higher layer to release the second sidelink connection.

[0142] In this way, the first terminal may release the first sidelink connection based on the target release indication from the higher layer.

[0143] Connection release event 2: A sidelink wireless link failure occurs in the second sidelink connection between the first terminal and the relay terminal.

[0144] For example, the first terminal may release the first sidelink connection when determining that a sidelink radio link failure occurs in the second sidelink connection.

[0145] Similarly, a first sidelink connection established between the first terminal and the second terminal via the relay terminal may be determined first, and then the first sidelink connection may be released.

[0146] In some embodiments, when a preset RLF event occurs in the second sidelink connection, it can be determined that a sidelink radio link failure occurs in the second sidelink connection. The preset RLF event may include any one or more of the RLF events 1 to 4 described above in this disclosure, which will not be repeated here.

[0147] Connection release event three: receiving the target indication sent by the relay terminal.

[0148] The target indication may be used to indicate that the third sidelink connection between the relay terminal and the second terminal is interrupted.

[0149] For example, the first terminal may release the first sidelink connection when receiving a target indication sent by the relay terminal.

[0150] Similarly, a first sidelink connection established between the first terminal and the second terminal via the relay terminal may be determined first, and then the first sidelink connection may be released.

[0151] In some embodiments, the relay terminal may send the target indication to the first terminal when determining that the third direct link sidelink connection between the relay terminal and the second terminal is interrupted.

[0152] Connection release event 4: receiving a target indication sent by the relay terminal, and determining, based on the target indication, that the sidelink connections between a plurality of second terminals that maintain sidelink connections with the first terminal through the relay terminal and the relay terminal are all disconnected.

[0153] Likewise, the target indication may be used to indicate that the third sidelink connection between the relay terminal and the second terminal is interrupted.

[0154] For example, there may be multiple second terminals that maintain sidelink connections with the first terminal through a relay terminal. The first terminal may receive a target indication sent by the relay terminal, and determine based on the target indication that the sidelink connections between the multiple second terminals that maintain sidelink connections with the first terminal through the relay terminal and the relay terminal are all interrupted. In this case, the first terminal may determine the first sidelink connection established between the first terminal and the second terminal through the relay terminal, and release the first sidelink connection.

[0155] In some embodiments, the first terminal can maintain a sidelink connection with N second terminals through the relay terminal (N is a positive integer greater than or equal to 1), and the above target indication can be used to indicate that the third sidelink connection between the relay terminal and one or more of the second terminals is interrupted.

[0156] If the first terminal determines that the third sidelink connections of the above N second terminals are all interrupted according to the received target indication, a connection release event is triggered (that is, it is determined to release the second sidelink connection). At this time, the N first sidelink connections can be released, and the second sidelink connection between the first terminal and the relay terminal can be released.

[0157] If the first terminal determines according to the target indication that the third sidelink connection between M second terminals and the relay terminal is interrupted, where M is less than N, the second sidelink connection between the first terminal and the relay terminal can continue to be maintained, and only the first sidelink connection between the first terminal and the M second terminals indicated in the target indication needs to be released.

[0158] In this way, when a first terminal establishes sidelink connections with multiple second terminals through a relay terminal, reliable management of the sidelink connections can be achieved, and invalid sidelink connections can be released in a timely manner.

[0159] It should be noted that the aforementioned interruption of the third Sidelink connection may include: the third Sidelink connection has been interrupted or is about to be interrupted. For example, the relay terminal may send the aforementioned target indication after executing the release of the third Sidelink connection, and the target indication is used to indicate that the third Sidelink connection has been interrupted. For another example, the relay terminal may send the aforementioned target indication to the first terminal after determining to release the third Sidelink connection but before executing the release step, and the target indication is used to indicate that the third Sidelink connection is about to be interrupted.

[0160] In some embodiments, the target indication may include a first indication, where the first indication is used to indicate that a sidelink radio link failure occurs in the third sidelink connection between the relay terminal and the second terminal.

[0161] For example, when a preset RLF event occurs in the third sidelink connection, the relay terminal may determine that a sidelink radio link failure occurs in the third sidelink connection. The preset RLF event may include any one or more of the RLF events 1 to 4 described above in this disclosure, which will not be repeated here.

[0162] In some other embodiments, the target indication may include a second indication, where the second indication is used to indicate that the third sidelink connection between the relay terminal and the second terminal is released.

[0163] For example, the relay terminal can actively release the second sidelink connection, or release the third sidelink connection based on the request of the second terminal, or release the third sidelink connection based on the instruction of the network device, or release the third sidelink connection based on an instruction triggered by the user. The present disclosure does not limit the manner in which the relay terminal triggers the release of the third sidelink connection.

[0164] It should also be noted that the meaning of the third sidelink connection being released may include: the third sidelink connection has been released or is about to be released. For example, the relay terminal may send the second indication after executing the release of the third sidelink connection, and the second indication is used to indicate that the third sidelink connection has been released. For another example, the relay terminal may send the target indication to the first terminal if it determines to release the third sidelink connection but has not yet executed the release step, and the target indication is used to indicate that the third sidelink connection is about to be released.

[0165] It should be understood that the target indication may include only the first indication, only the second indication, or both the first indication and the second indication, and the present disclosure does not limit this.

[0166] In this way, in different scenarios, the first terminal can release the first sidelink connection in a timely manner based on different instructions of the relay terminal.

[0167] Figure 4 A connection release method is shown according to an exemplary embodiment. This method can be applied to the relay terminal in the above communication system. Figure 4 As shown, the method may include:

[0168] S401: When determining that a third direct link sidelink connection between the relay terminal and the second terminal is interrupted, the relay terminal sends a target indication to the first terminal.

[0169] The third sidelink connection is a sidelink connection between the relay terminal and the second terminal.

[0170] In this way, the first terminal may release the first sidelink connection in response to receiving the target indication, and the target indication may be used to indicate that the third sidelink connection between the relay terminal and the second terminal is interrupted.

[0171] It should be noted that the manner in which the first terminal releases the first sidelink connection can refer to the description of the aforementioned embodiment of the present disclosure, and will not be repeated here.

[0172] The target indication may include a first indication and / or a second indication, for example:

[0173] In some embodiments, the target indication may include a first indication, which may be used to indicate that a sidelink radio link failure occurs in the third sidelink connection between the relay terminal and the second terminal.

[0174] For example, when a preset RLF event occurs in the third sidelink connection, the relay terminal may determine that a sidelink radio link failure occurs in the third sidelink connection. The preset RLF event may include any one or more of the RLF events 1 to 4 described above in this disclosure, which will not be described in detail here.

[0175] In some other embodiments, the target indication may include a second indication, and the second indication may be used to indicate that the third sidelink connection between the relay terminal and the second terminal is released.

[0176] For example, the relay terminal can actively release the second sidelink connection, or release the third sidelink connection based on the request of the second terminal, or release the third sidelink connection based on the instruction of the network device, or release the third sidelink connection based on an instruction triggered by the user. The present disclosure does not limit the manner in which the relay terminal triggers the release of the third sidelink connection.

[0177] It should also be noted that the meaning of the third sidelink connection being released can include that the third sidelink connection has been released or is about to be released. For example, the relay terminal can send the second indication after performing the release of the third sidelink connection, and the second indication is used to indicate that the third sidelink connection has been released. For another example, the relay terminal can send the target indication to the first terminal in a case where it is determined to release the third sidelink connection but has not yet performed the release step, and the target indication is used to indicate that the third sidelink connection is about to be released.

[0178] Figure 5 A connection release method is shown according to an example embodiment. As shown in Figure 5 the method can include:

[0179] S501, the relay terminal sends a target indication to the first terminal in a case where it is determined that a third sidelink connection between the relay terminal and the second terminal is interrupted.

[0180] The third sidelink connection is a sidelink connection between the relay terminal and the second terminal, and the target indication can be used to indicate that the third sidelink connection is interrupted.

[0181] S502, the first terminal releases a first sidelink connection in response to receiving the target indication.

[0182] The first sidelink connection is a sidelink connection between the first terminal and the second terminal.

[0183] For example, the first terminal can determine the first sidelink connection established by the first terminal and the second terminal through the relay terminal in a case where it receives the target indication sent by the relay terminal, and release the first sidelink connection.

[0184] The target indication can include a first indication and / or a second indication, for example:

[0185] In some embodiments, the relay terminal can send a first indication to the first terminal in a case where it is determined that the third sidelink connection has a sidelink radio link failure, and the first terminal can release the first sidelink connection in response to receiving the first indication. The first indication can be used to indicate that the third sidelink connection between the relay terminal and the second terminal has a sidelink radio link failure.

[0186] In some other embodiments, upon determining that the third Sidelink connection is released, the relay terminal may send a second indication to the first terminal; and the first terminal may release the first Sidelink connection in response to receiving the second indication, wherein the second indication is used to indicate that the third Sidelink connection between the relay terminal and the second terminal is released.

[0187] In another implementation of this embodiment, the first terminal may release the first sidelink connection and the second sidelink connection in response to receiving the target indication, where the second sidelink connection is a sidelink connection between the first terminal and the relay terminal.

[0188] It should be noted that the specific manner in which the first terminal releases the first sidelink connection and the second sidelink connection can be referred to the description in the aforementioned embodiment of the present disclosure, and will not be repeated here.

[0189] Using the above method, the relay terminal can send a target indication to the first terminal upon determining that the third direct link Sidelink connection between the relay terminal and the second terminal is disconnected. In response to receiving the target indication, the first terminal can release the first Sidelink connection. This allows the first terminal to promptly release the unavailable first Sidelink connection, reducing its resource usage. Furthermore, the first terminal can more quickly establish a new connection with the second terminal based on service needs, without having to wait for the original connection to be released. This avoids data transmission delays and improves data transmission efficiency.

[0190] Figure 6 FIG. 2 is a block diagram of a connection release device 2100 according to an exemplary embodiment. The device can be applied to a first terminal. Figure 6 As shown, the apparatus 2100 may include:

[0191] The first release module 2101 is configured to release the first direct link sidelink connection established between the first terminal and the second terminal through the relay terminal in response to triggering a connection release event; the connection release event is used to indicate the release of the second sidelink connection between the first terminal and the relay terminal.

[0192] Figure 7 FIG. 2 is a block diagram of a connection release device 2100 according to an exemplary embodiment. Figure 7 As shown, the apparatus 2100 may further include:

[0193] The second releasing module 2102 is configured to release the second sidelink connection between the first terminal and the relay terminal.

[0194] In some embodiments, the second releasing module 2102 is configured to notify a higher layer of the first terminal through an access layer of the first terminal to release the second sidelink connection.

[0195] In some embodiments, the first release module 2101 is configured to transmit a first release parameter to a higher layer of the first terminal through the access layer of the first terminal; the first release parameter is used to notify the higher layer to release the first sidelink connection.

[0196] In some embodiments, the first release parameter includes a preset release reason parameter, and the preset release reason parameter is used to indicate that the second sidelink connection between the first terminal and the relay terminal is interrupted.

[0197] In some embodiments, the connection release event includes:

[0198] The access layer receives a target release indication from the higher layer; the target release indication is used to instruct the access layer to release the second sidelink connection.

[0199] In some embodiments, the connection release event includes:

[0200] A sidelink wireless link failure occurs in the second sidelink connection between the first terminal and the relay terminal.

[0201] In some embodiments, the connection release event includes:

[0202] A target indication sent by the relay terminal is received; the target indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is interrupted.

[0203] In some embodiments, the target indication includes a first indication, where the first indication is used to indicate that a sidelink radio link failure occurs in a third sidelink connection between the relay terminal and the second terminal.

[0204] In some embodiments, the target indication includes a second indication, where the second indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is released.

[0205] In some embodiments, there are multiple second terminals, and the connection release event includes:

[0206] The target indication sent by the relay terminal is received, and it is determined according to the target indication that the sidelink connection of each of the plurality of second terminals maintaining the sidelink connection with the first terminal through the relay terminal is interrupted.

[0207] Figure 8 is a block diagram of a connection release apparatus 2200 according to an exemplary embodiment. The apparatus can be applied to a relay terminal. As shown in Figure 8 The apparatus 2200 can include the following components:

[0208] A first sending module 2201 configured to, in a case where it is determined that a third sidelink connection between the relay terminal and a second terminal is interrupted, send a target indication to a first terminal, so that the first terminal releases a first sidelink connection established by the first terminal with the second terminal through the relay terminal in response to receiving the target indication, the target indication being used to indicate that the third sidelink connection between the relay terminal and the second terminal is interrupted.

[0209] In some embodiments, the target indication includes a first indication, the first indication being used to indicate that a sidelink radio link failure occurs in the third sidelink connection between the relay terminal and the second terminal.

[0210] In some embodiments, the target indication includes a second indication, the second indication being used to indicate that the third sidelink connection between the relay terminal and the second terminal is released.

[0211] As for the apparatus in the above embodiments, the specific manners in which the respective modules perform operations have been described in detail in the embodiments of the method, and will not be described in detail here.

[0212] Figure 9 is a block diagram of a connection release apparatus according to an exemplary embodiment. The connection release apparatus 3000 can be Figure 1 As shown in the communication system, the terminal device (such as the first terminal, the second terminal or the relay terminal) can also be a network device in the communication system.

[0213] Referring to Figure 9 The apparatus 3000 can include one or more of the following components: a processing component 3002, a memory 3004, and a communication component 3006.

[0214] The processing component 3002 can be used to control the overall operation of the device 3000, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. The processing component 3002 can include one or more processors 3020 to execute instructions to complete all or part of the steps of the connection release method described above. In addition, the processing component 3002 can include one or more modules to facilitate interaction between the processing component 3002 and other components. For example, the processing component 3002 can include a multimedia module to facilitate interaction between the multimedia component and the processing component 3002.

[0215] The memory 3004 is configured to store various types of data to support operations on the device 3000. Examples of such data include instructions for any application or method operating on the device 3000, contact data, phone book data, messages, pictures, videos, etc. The memory 3004 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0216] The communication component 3006 is configured to facilitate wired or wireless communication between the device 3000 and other devices. The device 3000 can access a wireless network based on a communication standard, such as Wi-Fi, 2G, 3G, 4G, 5G, 6G, NB-IOT, eMTC, etc., or a combination thereof. In an exemplary embodiment, the communication component 3006 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 3006 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0217] In an exemplary embodiment, the apparatus 3000 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-mentioned connection release method.

[0218] The above-mentioned device 3000 can be an independent electronic device or a part of an independent electronic device. For example, in one embodiment, the electronic device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be a single IC or a collection of multiple ICs; the chip can include but is not limited to the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip, SoC, system on chip or system-on-chip), etc. The above-mentioned integrated circuit or chip can be used to execute executable instructions (or codes) to implement the above-mentioned connection release method. The executable instructions can be stored in the integrated circuit or chip, or obtained from other devices or equipment. For example, the integrated circuit or chip includes a processor, a memory, and an interface for communicating with other devices. The executable instruction may be stored in the processor, and when the executable instruction is executed by the processor, the above-mentioned connection release method is implemented; alternatively, the integrated circuit or chip may receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the above-mentioned connection release method.

[0219] In an exemplary embodiment, the present disclosure further provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the steps of the connection release method provided by the present disclosure. For example, the computer-readable storage medium may be a non-transitory computer-readable storage medium including instructions, for example, the above-mentioned memory 3004 including instructions, and the above-mentioned instructions may be executed by the processor 3020 of the device 3000 to complete the above-mentioned connection release method. For example, the non-transitory computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0220] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program that can be executed by a programmable device, and the computer program has a code portion for executing the above connection release method when executed by the programmable device.

[0221] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0222] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A connection release method, characterized in that: Applied to a first terminal, the method includes: In response to triggering a connection release event, releasing a first direct link sidelink connection established between the first terminal and the second terminal via the relay terminal; the connection release event is used to indicate the release of a second sidelink connection between the first terminal and the relay terminal; the connection release event includes: a sidelink radio link failure occurs in the second sidelink connection between the first terminal and the relay terminal; The second sidelink connection between the first terminal and the relay terminal is released.

2. The method according to claim 1, characterized in that The releasing the second sidelink connection between the first terminal and the relay terminal includes: The access layer of the first terminal notifies the higher layer of the first terminal to release the second sidelink connection.

3. The method according to claim 1, characterized in that The releasing the first direct link sidelink connection established between the first terminal and the second terminal via the relay terminal includes: A first release parameter is transmitted to a higher layer of the first terminal through the access layer of the first terminal; the first release parameter is used to notify the higher layer to release the first sidelink connection.

4. The method according to claim 3, characterized in that The first release parameter includes a preset release reason parameter, and the preset release reason parameter is used to indicate that the second sidelink connection between the first terminal and the relay terminal is interrupted.

5. The method according to claim 3 or 4, characterized in that The connection release event includes: The access layer receives a target release indication from the higher layer; the target release indication is used to instruct the access layer to release the second sidelink connection.

6. The method according to any one of claims 1 to 4, characterized in that The connection release event includes: The first terminal receives a target indication sent by the relay terminal; the target indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is interrupted.

7. The method according to claim 6, characterized in that The target indication includes a first indication, where the first indication is used to indicate that a sidelink radio link failure occurs in a third sidelink connection between the relay terminal and the second terminal.

8. The method according to claim 6, characterized in that The target indication includes a second indication, where the second indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is released.

9. The method according to claim 6, characterized in that There are multiple second terminals, and the connection release event includes: The first terminal receives a target indication sent by the relay terminal, and determines, according to the target indication, that the sidelink connections between the plurality of second terminals that maintain sidelink connections with the first terminal through the relay terminal and the relay terminal are all interrupted.

10. A connection release method, characterized in that: Applied to a relay terminal, the method includes: sending, upon determining that a third direct link Sidelink connection between the relay terminal and the second terminal is interrupted, a target indication to the first terminal, so that the first terminal, in response to receiving the target indication, releases the first direct link Sidelink connection established between the first terminal and the second terminal via the relay terminal, wherein the target indication is used to indicate that the third Sidelink connection between the relay terminal and the second terminal is interrupted; and / or, The first sidelink connection established between the first terminal and the second terminal through the relay terminal is released by the first terminal in response to triggering a connection release event; the connection release event is used to indicate the release of the second sidelink connection between the first terminal and the relay terminal; the connection release event includes: a sidelink wireless link failure occurs in the second sidelink connection between the first terminal and the relay terminal.

11. The method according to claim 10, characterized in that The target indication includes a first indication, where the first indication is used to indicate that a sidelink radio link failure occurs in a third sidelink connection between the relay terminal and the second terminal.

12. The method according to claim 10, characterized in that The target indication includes a second indication, where the second indication is used to indicate that a third sidelink connection between the relay terminal and the second terminal is released.

13. A connection release device, characterized in that: Applied to a first terminal, the apparatus includes: A first releasing module is configured to release a first direct link sidelink connection established between the first terminal and the second terminal via the relay terminal in response to triggering a connection release event; the connection release event is used to indicate the release of a second sidelink connection between the first terminal and the relay terminal; the connection release event includes: a sidelink radio link failure occurs in the second sidelink connection between the first terminal and the relay terminal; The second sidelink connection between the first terminal and the relay terminal is released.

14. A connection release device, characterized in that: Applied to a relay terminal, the device includes: a first sending module configured to, upon determining that a third direct link Sidelink connection between the relay terminal and the second terminal is interrupted, send a target indication to the first terminal, so that the first terminal, in response to receiving the target indication, releases the first direct link Sidelink connection established between the first terminal and the second terminal via the relay terminal, wherein the target indication is used to indicate that the third Sidelink connection between the relay terminal and the second terminal is interrupted; and / or, The first sidelink connection established between the first terminal and the second terminal through the relay terminal is released by the first terminal in response to triggering a connection release event; the connection release event is used to indicate the release of the second sidelink connection between the first terminal and the relay terminal; the connection release event includes: a sidelink wireless link failure occurs in the second sidelink connection between the first terminal and the relay terminal.

15. A connection release device, characterized in that: The device comprises: processor; a memory for storing processor-executable instructions; The processor is configured to execute the steps of the method according to any one of claims 1 to 9, or the processor is configured to execute the steps of the method according to any one of claims 10 to 12.

16. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented; or when the computer program instructions are executed by a processor, the steps of the method according to any one of claims 10 to 12 are implemented.

17. A chip, characterized in that: Comprising a processor and an interface; the processor is used to read instructions to execute the steps of the method according to any one of claims 1 to 9, or the processor is used to read instructions to execute the steps of the method according to any one of claims 10 to 12.

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