User equipment information acquisition method, communication device, communication system, and storage medium

Abstract

The present disclosure relates to a user equipment information acquisition method, a communication device, a communication system, and a storage medium. The user equipment information acquisition method comprises: a first user equipment sending first information, wherein the first information is used for making a request to subscribe to user equipment information, which is related to a first service, of a second user equipment; and receiving the user equipment information sent by the second user equipment. Thus, user equipment information required by a service is effectively updated.

Description

Terminal information acquisition method, communication device, communication system, and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a terminal information acquisition method, a communication device, a communication system, and a storage medium. Background Art

[0002] In order to support direct communication between terminals, a sidelink (SL) communication method is introduced. Ranging refers to determining the distance between two or more terminals, or the direction from one terminal to another, through a PC5 interface. A PC5 interface refers to a communication interface between terminals, such as a short-range direct communication interface between vehicles, people, and road infrastructure. Sidelink SL positioning refers to estimating the position of a located terminal based on the sidelink SL. For example, ranging or sidelink SL positioning can be performed on a located terminal (e.g., a target terminal (target user equipment, target UE)) based on information from a terminal (e.g., a positioning terminal (located user equipment, located UE)). The reference terminal can be, for example, an SL reference terminal whose position is known or can be known in ranging or sidelink SL positioning. For another example, the relative position information of a terminal (e.g., a target terminal (target user equipment, target UE)) and another terminal (e.g., an SL reference terminal (sidelink reference user equipment, sidelink reference UE)) can be determined through ranging or sidelink SL positioning.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a terminal information acquisition method, terminal, device, chip system, storage medium, computer program and computer program product, which can be applied in the field of communication technology to solve the technical problem that "the relevant technology does not support the terminal information required for updating the service".

[0005] The present disclosure provides a terminal information acquisition method, a communication device, a communication system, and a storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a terminal information acquisition method is proposed, which is executed by a first terminal, including: sending first information, wherein the first information is used to request subscription to terminal information related to the first service of a second terminal; and receiving terminal information sent by the second terminal.

[0007] According to a second aspect of an embodiment of the present disclosure, a terminal information acquisition method is proposed, which is executed by a second terminal, including: receiving first information, wherein the first information is used by the first terminal to request to subscribe to terminal information related to the first service of the second terminal; and sending terminal information to the first terminal.

[0008] According to a third aspect of an embodiment of the present disclosure, a terminal information acquisition method is proposed, including: a first terminal sends first information, wherein the first information is used to request subscription to terminal information related to a first service of a second terminal; the second terminal receives the first information and sends the terminal information to the first terminal; the first terminal receives the terminal information.

[0009] According to the fourth aspect of an embodiment of the present disclosure, a terminal is proposed, including: a transceiver module, used to send first information and receive terminal information related to a first service sent by a second terminal, wherein the first information is used to request subscription to the terminal information of the second terminal; or used to receive the first information and send terminal information to the first terminal.

[0010] According to the fifth aspect of an embodiment of the present disclosure, a communication device is proposed, comprising: one or more processors; wherein the processor is used to call instructions to enable the communication device to execute the terminal information acquisition method of any one of the first aspect, the second aspect, and the third aspect.

[0011] According to the sixth aspect of an embodiment of the present disclosure, a communication system is proposed, characterized in that it includes a first terminal and a second terminal, wherein the first terminal is configured to implement the terminal information acquisition method of the first aspect, and the second terminal is configured to implement the terminal information acquisition method of the second aspect.

[0012] According to the seventh aspect of the embodiment of the present disclosure, a storage medium is proposed, which stores instructions, and is characterized in that when the instructions are executed on a communication device, the communication device executes a terminal information acquisition method as described in any one of the first, second, and third aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background technology, the drawings required for use in the embodiments of the present disclosure or the background technology will be described below.

[0014] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

[0015] FIG2 is an interactive diagram illustrating a method for acquiring terminal information according to an embodiment of the present disclosure;

[0016] FIG3A is an interactive diagram illustrating a method for acquiring terminal information according to another embodiment of the present disclosure;

[0017] FIG3B is an interactive diagram illustrating a method for acquiring terminal information according to another embodiment of the present disclosure;

[0018] FIG3C is an interactive diagram illustrating a method for acquiring terminal information according to another embodiment of the present disclosure;

[0019] FIG4A is an interactive diagram illustrating a method for acquiring terminal information according to another embodiment of the present disclosure;

[0020] FIG4B is an interactive diagram illustrating a method for acquiring terminal information according to another embodiment of the present disclosure;

[0021] FIG4C is an interactive diagram illustrating a method for acquiring terminal information according to another embodiment of the present disclosure;

[0022] FIG5 is an interactive diagram illustrating a method for acquiring terminal information according to yet another embodiment of the present disclosure;

[0023] FIG6A is a schematic diagram of terminal information transmission based on subscription in an embodiment of the present disclosure;

[0024] FIG6B is a schematic diagram of terminal information for implicit subscription updates in an embodiment of the present disclosure;

[0025] FIG7A is a schematic structural diagram of a terminal proposed in an embodiment of the present disclosure;

[0026] FIG7B is a schematic structural diagram of a terminal proposed in another embodiment of the present disclosure;

[0027] FIG8A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure;

[0028] FIG8B is a schematic diagram of the structure of the chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] The present disclosure provides a terminal information acquisition method, communication device, communication system, and storage medium. In some embodiments, the terms "terminal information acquisition method" and "information processing method" and "communication method" are interchangeable; the terms "terminal information acquisition device" and "information processing device" and "communication device" are interchangeable; and the terms "information processing system" and "communication system" are interchangeable.

[0030] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0031] In each embodiment of the present disclosure, unless otherwise specified and there is no logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment according to their internal logical relationship.

[0032] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0033] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0034] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0035] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0036] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0037] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0038] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0039] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0040] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0041] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0042] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0043] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0044] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0045] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0046] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0047] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0048] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0049] As shown in FIG1 , a communication system 100 includes a terminal 101, a terminal 102, a core network device 103, and an access network device 104. Terminal 101 or terminal 102 can be connected to core network device 103 via access network device 104. In some embodiments, terminal 101 or terminal 102 includes, for example, at least one of a mobile phone, a wearable device, an Internet of Things device, a car with communication capabilities, a smart car, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and a wireless terminal device in a smart home, but is not limited thereto.

[0050] In some embodiments, the communication system 100 may further include an access network device, which is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0051] In some embodiments, the access network device 104 is, for example, a node or device that accesses the terminal to a wireless network. The access network device 104 may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a WiFi system, but is not limited thereto.

[0052] In some embodiments, the access network device 104 can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0053] In some embodiments, the core network device 103 may be a single device, or may be multiple devices or a group of devices. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0054] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0055] The following embodiments of the present disclosure may be applied to the communication system 100 shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0056] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0057] In order to support direct communication between terminals, a sidelink (SL) communication method is introduced. Ranging refers to determining the distance between two or more terminals, or the direction from one terminal to another, through a PC5 interface. A PC5 interface refers to a communication interface between terminals, such as a short-range direct communication interface between vehicles, people, and road infrastructure. Sidelink SL positioning refers to estimating the position of a located terminal based on the sidelink SL. For example, ranging or sidelink SL positioning can be performed on a located terminal (e.g., a target terminal (target user equipment, target UE)) based on information from a terminal (e.g., a positioning terminal (located user equipment, located UE)). The reference terminal can be, for example, an SL reference terminal whose position is known or can be known in ranging or sidelink SL positioning. For another example, the relative position information of a terminal (e.g., a target terminal (target user equipment, target UE)) and another terminal (e.g., an SL reference terminal (sidelink reference user equipment, sidelink reference UE)) can be determined through ranging or sidelink SL positioning.

[0058] Optionally, terminal positioning assisted by SL positioning involves the 5G Core (5GC), which uses the positions of one or more positioning terminals, as well as the distance and / or direction between the target terminal and the positioning terminal, to estimate the location of the target terminal with the assistance of the network. For example, 5GC Mobile Originated Location Request (5GC-MO-LR) and 5GC Mobile Terminated Location Request (5GC-MT-LR) services.

[0059] Optionally, the ranging / SL positioning results may include: absolute position, relative position, distance and direction, depending on the business requirements. If the target terminal decides to start the SL-MO-LR process, the target terminal may include information about one or more SL reference terminals and / or positioning terminals in the service request message. If the location services client (LCS Client) or application function (AF) network element decides to obtain the ranging / SL positioning results of a group of n terminals (n≥2), i.e., terminal 1, terminal 2, ..., terminal n, the gateway mobile location center (GMLC) designates one of the n terminals as the target terminal, and designates one or more reference terminals and / or positioning terminals, then the SL-MT-LR process may be applied.

[0060] Optionally, discovery based on Mode A and Mode B can be used to support 5G ProSe terminal discovery (including commercial and public safety use cases). When a ranging / SL positioning terminal is directly discovered, the discovery type is "ranging / SL positioning"; when a ranging / SL positioning group member is discovered, the "Application Layer Group ID" indicates the ranging / SL positioning group to which the terminal belongs.

[0061] Optionally, some communication protocols define a V2X communication process over the PC5 reference point for discovering terminals that support V2X services. When using a unicast mode V2X communication process, the "Service Type" in the Layer 2 Link Establishment process is "Ranging / SL Positioning." When using a broadcast or multicast mode V2X communication process, the "Service Type" in the Layer 2 Link Establishment process is "Ranging / SL Positioning."

[0062] Optionally, the role of the discovered terminal (e.g., target terminal, SL reference terminal, SL positioning server terminal, positioning terminal) can be included in the discovery message (for terminals supporting 5G Proximity Services (ProSe)) and the unicast link establishment message (for terminals supporting V2X) as Ranging and Sidelink Positioning Protocol (RSPP) specific metadata.

[0063] Optionally, when SL positioning is applied to determine the absolute location of the target terminal, the target terminal discovers and selects the positioning terminal. When the Location Management Function (LMF) network element decides to apply SL positioning to the target terminal, the LMF network element triggers the target terminal to discover the positioning terminal. The LMF network element may provide the target terminal with a list of candidate positioning terminals as auxiliary data.

[0064] Optionally, when SL positioning is applied to determine the relative position of the target terminal, the target terminal may discover one or more SL reference terminals.

[0065] Optionally, the ranging / SL positioning service is a service that is sensitive to the terminal role, and the terminal role is exchanged in the terminal discovery process. For terminals that support ProSe, when the terminal is discovered to perform ranging / SL positioning, terminal discovery based on mode A and mode B is supported at the same time, and the terminal role of the discovered terminal (e.g., target terminal, SL reference terminal, SL positioning server terminal, positioning terminal) is included in the discovery message (for terminals that support 5G ProSe). For terminals that support V2X, the terminal role of the discovered terminal (e.g., target terminal, SL reference terminal, SL positioning server terminal, positioning terminal) is included in the unicast link establishment message as RSPP specific metadata. However, the ranging / SL positioning service is performed between at least two terminals with specific terminal roles, such as requesting the relative position, or distance and direction, between the target terminal and at least one reference terminal, or requesting the absolute position of the target terminal based on the SL positioning between the target terminal and at least one reference terminal. Therefore, after discovering the terminal, it is necessary to promptly update the new terminal information or updated terminal information (e.g., terminal role) to the opposite terminal.

[0066] Optionally, if coverage information of the terminal is considered (eg, inside coverage or outside coverage), after the terminal is discovered, updated terminal information (eg, coverage information during terminal movement) is not effectively updated to the opposite terminal.

[0067] Optionally, in the process of opening services to the SL positioning client terminal through PC5, the status information received by the terminal from the discovered terminal regarding the presence or absence of a non-access stratum (NAS) connection will also affect the SL positioning client terminal's selection of a terminal for performing SL positioning operations and the selection of a terminal for receiving SL positioning service requests. It will also affect the terminal receiving the SL positioning service request's selection of an LMF network element or an SL positioning server terminal. After the terminal is discovered, the terminal's status information is not effectively updated to the opposite terminal.

[0068] Based on this, the present disclosure proposes a terminal information acquisition method to effectively update the terminal information required for the service.

[0069] The embodiments of the present disclosure provide a method that can be applied to a first service scenario. For example, it can be applied to a ranging or SL positioning scenario. Of course, the method of the present disclosure can also be applied to any other possible service scenario.

[0070] FIG2 is an interactive diagram of a method for obtaining terminal information according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to a method for obtaining terminal information, which can be used in a communication system 100. The method includes:

[0071] Step S2101: The first terminal sends first information.

[0072] The first information is used to request subscription of terminal information of the second terminal related to the first service.

[0073] In some embodiments, a first terminal may request to subscribe to terminal information of a second terminal related to a first service. When the first terminal needs to subscribe to terminal information of a second terminal, the first terminal may send first information to the second terminal to request to subscribe to terminal information of the second terminal related to the first service based on the first information.

[0074] In some embodiments, the first information includes at least one of the following: the type of terminal information requested; the notification target address; the subscription conditions; the subscription expiration time; and the unsubscription conditions. This enables on-demand subscription to the terminal information of the second terminal, effectively applicable to personalized service scenarios.

[0075] In some embodiments, the requested terminal information type indicates the type of terminal information to which the first terminal wishes to subscribe. The notification destination address indicates the destination address for notifying the terminal information. The subscription condition indicates the condition that triggers the first terminal to request a subscription. The subscription expiration time indicates the validity period of the first terminal's subscription to the second terminal's terminal information. The unsubscription condition indicates the condition that triggers the first terminal to unsubscribe.

[0076] In some embodiments, the type of terminal information includes at least one of the following: role information of the second terminal; coverage information of the second terminal; status information of the second terminal; and capability information of the second terminal. This enables subscription to comprehensive terminal information of the second terminal.

[0077] In some embodiments, the role information of the second terminal can be used to indicate the terminal role or terminal role list corresponding to the second terminal in the first service. The terminal role is, for example, one or more roles among the target terminal, SL reference terminal, SL positioning server terminal, and positioning terminal, and there is no restriction on this.

[0078] In some embodiments, the coverage information of the second terminal indicates whether the terminal is outside or within the coverage of the wireless network.

[0079] In some embodiments, the status information of the second terminal indicates the connection status of the second terminal, such as status information of whether the second terminal has a non-NAS connection or no NAS connection.

[0080] In some embodiments, the capability information of the second terminal is used to describe the capability of the second terminal. For example, when the first service is a positioning service, the capability information of the second terminal is used to describe the positioning method supported by the second terminal.

[0081] The terminal information of the second terminal may specifically be, for example, new terminal information or updated terminal information, which is not limited.

[0082] In some embodiments, the first service may be, for example, a ranging or sidelink (SL) positioning service, so that the terminal information of the second terminal can be effectively updated during the implementation of the ranging or sidelink (SL) positioning service.

[0083] In some embodiments, a subscription mechanism may be applied to explicitly subscribe to new terminal information or updated terminal information.

[0084] In some embodiments, a first terminal may send a terminal information subscription request message to a second terminal. This terminal information subscription request message may carry the first information, instructing the second terminal to subscribe to the second terminal's terminal information related to the first service. This allows the second terminal to explicitly subscribe to the second terminal's terminal information related to the first service based on a new message, avoiding the use of existing message resources and improving the flexibility of terminal information subscription requests.

[0085] In some embodiments, a first terminal may send a direct communication request message to a second terminal, wherein the direct communication request message is used to trigger establishment of a link between the first terminal and the second terminal, and the direct communication request message includes the first information. This allows subscription to the second terminal's terminal information related to the first service to be achieved through the link establishment process. By reusing the direct communication request message to request subscription to the second terminal's terminal information, implicit subscription to the second terminal's terminal information related to the first service can be achieved, improving the flexibility of terminal information subscription requests.

[0086] In some embodiments, the first terminal may subscribe to the terminal information related to the first service of the second terminal based on the discovery process of mode A. The first terminal may send a first discovery request message based on a broadcast method, wherein the first discovery request message is used to discover the second terminal, and the first discovery request message includes the first information. Thus, subscription to the terminal information related to the first service of the second terminal is achieved based on the terminal discovery process. By reusing the request message for discovering the terminal and applying mode A to request subscription to the terminal information of the second terminal, implicit subscription to the terminal information related to the first service of the second terminal is achieved, thereby improving the flexibility of terminal information request subscription.

[0087] In some embodiments, the first terminal may subscribe to the terminal information of the second terminal related to the first service based on the discovery process of mode B. The first terminal may send a second discovery request message to the second terminal, wherein the second discovery request message is used to discover the second terminal, and the second discovery request message includes the first information. Thus, subscription to the terminal information of the second terminal related to the first service is achieved based on the terminal discovery process. The first terminal can request subscription to the terminal information of the second terminal by reusing the request message for discovering the terminal and applying the discovery process of mode B, thereby implicitly subscribing to the terminal information of the second terminal related to the first service, thereby improving the flexibility of terminal information request subscription.

[0088] In some embodiments, a first terminal may send a first link modification request message to a second terminal, wherein the first link modification request message is used to request modification of the link between the first terminal and the second terminal, and the first link modification request message includes first information. Thus, subscription to the second terminal's terminal information related to the first service is achieved based on a link modification process. By reusing the link modification request message to request subscription to the second terminal's terminal information, implicit subscription to the second terminal's terminal information related to the first service is achieved, thereby improving the flexibility of terminal information subscription requests.

[0089] In an embodiment of the present disclosure, the second terminal may also include the first information in a response message to the second discovery request message or the direct communication request message or the first link modification request message sent to the first terminal, thereby realizing the second terminal sending the response message requesting to subscribe to the terminal information of the first terminal, and accordingly, the first terminal receiving the response message provides the subscribed terminal information, and there is no restriction on this.

[0090] Step S2102: The second terminal sends second information to the first terminal based on the first information.

[0091] The second information is used to instruct the second terminal to accept the subscription request of the first terminal for the terminal information.

[0092] In some embodiments, after receiving the first information, the second terminal may indicate to the first terminal that it has accepted the first terminal's request to subscribe to the terminal information.

[0093] In some embodiments, the second information includes at least one of the following: a subscription association identifier; a subscription expiration time; and terminal information, thereby effectively indicating the specific circumstances of the accepted subscription request.

[0094] In some embodiments, the subscription association identifier may be used to identify the process of the first terminal subscribing to the terminal information.

[0095] In some embodiments, if there is new terminal information or updated terminal information, the second terminal may send the new terminal information or updated terminal information to the first terminal.

[0096] In some embodiments, if a subscription mechanism is used to explicitly subscribe to new or updated terminal information, after receiving a terminal information subscription request message from a first terminal, a second terminal may send back a terminal information subscription response message to the first terminal, where the terminal information subscription response message includes the second information. This allows explicit receipt of the first terminal's subscription request for terminal information based on a new message, avoiding the use of existing message resources and improving the flexibility of terminal information subscription requests.

[0097] In some embodiments, the link establishment process can be used to implicitly indicate receipt of a first terminal's subscription request for terminal information. After receiving a direct communication request message from the first terminal, the second terminal can provide the first terminal with a direct communication accept message. The direct communication accept message indicates acceptance of the link establishment between the first and second terminals and includes the second information. Multiplexing the direct communication accept message to implicitly indicate receipt of the first terminal's subscription request for terminal information increases the flexibility of terminal information subscription requests.

[0098] In some embodiments, implicit subscription to the terminal information of the second terminal related to the first service can be achieved based on the terminal discovery process. If the first terminal sends a first discovery request message based on a broadcast method (mode A), wherein the first discovery request message is used to discover the second terminal, and the first discovery request message includes the first information, then the second terminal can implicitly indicate that it has received the subscription request for the terminal information from the first terminal by sending an additional notification message, and can also carry new terminal information and / or updated terminal information in the notification message. If the first discovery request message includes the first information, the matching second terminal can carry the new terminal information and / or updated terminal information of the second terminal in the direct communication request message when initiating link establishment to implicitly indicate that it has received the subscription request for the terminal information from the first terminal.

[0099] In some embodiments, the terminal information related to the first service of the second terminal can be implicitly subscribed to based on the terminal discovery process. If the first terminal sends a second discovery request message to the second terminal (mode B), the second terminal can feedback a discovery response message to the first terminal, and the discovery response message includes the second information to implicitly indicate that the second discovery request message has been received based on the terminal discovery process. Thus, the indication that the subscription request of the first terminal has been accepted is implemented based on the terminal discovery process. It is possible to implicitly subscribe to the terminal information related to the first service of the second terminal, thereby improving the flexibility of terminal information request subscription.

[0100] In some embodiments, a link modification process can be used to implicitly indicate that a subscription request for terminal information from the first terminal has been received. After receiving the first link modification request message sent by the first terminal, the second terminal can feedback a first link modification acceptance message to the first terminal, wherein the first link modification request message is used to request modification of the link between the first terminal and the second terminal, and the first link modification acceptance message can carry second information to implicitly indicate that a subscription request for terminal information from the first terminal has been received. The ability to implicitly indicate that a subscription request for terminal information from the first terminal has been received by multiplexing the link modification process improves the flexibility of terminal information subscription requests.

[0101] Step S2103: The first terminal receives the second information sent by the second terminal.

[0102] In some embodiments, the first terminal may receive second information sent by the second terminal, and determine, based on the second information, that the second terminal accepts the first terminal's request to subscribe to terminal information.

[0103] Corresponding to the various embodiments described above, the second terminal sends various messages to the first terminal, where the messages include the second information. The first terminal can then receive the messages accordingly and obtain the second information carried in the messages.

[0104] In some embodiments, the first terminal may receive a terminal information subscription response message sent by the second terminal, wherein the terminal information subscription response message includes the second information.

[0105] In some embodiments, the first terminal may receive a direct communication acceptance message sent by the second terminal, wherein the direct communication acceptance message is used to indicate acceptance of establishing a link between the first terminal and the second terminal, and the direct communication acceptance message includes second information.

[0106] In some embodiments, the first terminal may receive a discovery response message sent by the second terminal, wherein the discovery response message is used to indicate that the second discovery request message has been received, and the discovery response message includes the second information.

[0107] In some embodiments, the first terminal may receive a first link modification accept message sent by the second terminal, wherein the first link modification accept message is used to indicate acceptance of modification of the link between the first terminal and the second terminal, and the first link modification accept message includes second information.

[0108] This enables the application subscription mechanism to explicitly learn that the second terminal has accepted the subscription request of the first terminal, or to implicitly learn that the second terminal has accepted the subscription request of the first terminal based on any one of the link establishment process, terminal discovery process, and link modification process, thereby comprehensively improving the flexibility of terminal information subscription and effectively applying it to personalized business scenarios.

[0109] In some embodiments, the above steps 2102 to 2103 may be optional steps, that is, step S2104 may be performed after step S2101 is performed, and there is no limitation on this.

[0110] In some embodiments, after the first terminal subscribes to the terminal information related to the first service of the second terminal, the second terminal does not need to send a response to the first terminal. The subscription is deemed successful by default. The second terminal can then send the terminal information related to the first service to the first terminal, and the first terminal can receive the terminal information related to the first service.

[0111] In some embodiments, if the first terminal fails to successfully subscribe to the terminal information related to the first service of the second terminal, the second terminal does not subsequently send the terminal information related to the first service to the first terminal.

[0112] Step S2104: The second terminal sends terminal information of the second terminal related to the first service to the first terminal.

[0113] In some embodiments, after the first terminal successfully subscribes to the terminal information of the second terminal, the second terminal may send the terminal information of the second terminal related to the first service to the first terminal.

[0114] In some embodiments, when the second terminal detects new terminal information and / or updated terminal information, the second terminal may further send a notification message to the first terminal to notify the new terminal information and / or updated terminal information.

[0115] Step S2105: The first terminal receives terminal information.

[0116] In some embodiments, after successfully subscribing to the terminal information of the second terminal, the first terminal may receive terminal information related to the first service sent by the second terminal.

[0117] Step S2106: The first terminal determines that the first condition is met and cancels the subscription to the terminal information of the second terminal.

[0118] In some embodiments, the first terminal may unsubscribe from the second terminal's terminal information related to the first service.

[0119] In some embodiments, the first terminal may cancel subscription of the second terminal to the terminal information related to the first service when determining that the first condition is met.

[0120] In some embodiments, satisfying the first condition includes at least one of the following: satisfying a subscription cancellation condition; completing the first service; releasing the link between the first terminal and the second terminal; or expiring the subscription expiration time. This effectively increases the flexibility of subscription cancellation and effectively adapts to personalized service needs.

[0121] In some embodiments, the first terminal determines that a subscription cancellation condition is met and may cancel subscription of the second terminal to the terminal information related to the first service.

[0122] In some embodiments, when the first terminal determines that the first service has been completed, the first terminal may unsubscribe from the terminal information related to the first service of the second terminal.

[0123] In some embodiments, when the first terminal determines that the link between the first terminal and the second terminal has been released, the first terminal may cancel the subscription of the second terminal to the terminal information related to the first service.

[0124] In some embodiments, the first terminal may unsubscribe from the terminal information of the second terminal without sending any message. For example, if the first terminal determines that the first condition is met, it may directly unsubscribe from the terminal information of the second terminal without sending any message.

[0125] In some embodiments, the subscription of the second terminal to the terminal information related to the first service may be canceled explicitly or implicitly.

[0126] In some embodiments, a subscription mechanism may be applied to unsubscribe the second terminal from the terminal information related to the first service. A link modification request message may also be applied to unsubscribe the second terminal from the terminal information related to the first service.

[0127] In some embodiments, the first terminal may send a terminal information unsubscription request message to the second terminal, wherein the terminal information unsubscription request message is used to request unsubscription of terminal information, thereby implementing an application subscription mechanism to explicitly unsubscribe the second terminal from terminal information related to the first service.

[0128] In some embodiments, the first terminal may send a second link modification request message to the second terminal, wherein the second link modification request message is used to request modification of the link between the first terminal and the second terminal and to request unsubscription of terminal information. This link modification process may be a new link modification process, thereby reusing the link modification process to unsubscribe the second terminal from terminal information related to the first service.

[0129] Step S2107: The second terminal indicates to the first terminal that it accepts the cancellation of the subscription terminal information.

[0130] In some embodiments, the second terminal may receive a terminal information unsubscribe request message sent by the first terminal, and determine that the first terminal initiates the cancellation of the terminal information related to the first service of the second terminal. The second terminal may then respond with a terminal information unsubscribe response message, wherein the terminal information unsubscribe response message is used to indicate that the subscription to the terminal information has been canceled.

[0131] In some embodiments, the first terminal may receive a terminal information unsubscription response message sent by the second terminal, and determine that the second terminal has accepted the unsubscription of the second terminal's terminal information related to the first service.

[0132] In some embodiments, the second terminal may receive a second link modification request message sent by the first terminal, and determine that the first terminal initiates the cancellation of the terminal information related to the first service of the second terminal. The second terminal may then respond with a second link modification acceptance message, wherein the second link modification acceptance message is used to indicate acceptance of the modification of the link between the first terminal and the second terminal and to indicate that the subscription to the terminal information has been cancelled.

[0133] In some embodiments, the first terminal may receive a second link modification acceptance message sent by the second terminal, and determine that the second terminal has accepted the cancellation of subscription to the terminal information related to the first service of the second terminal.

[0134] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2107. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, and so on, but the present invention is not limited thereto. Steps S2101+S2102 can be implemented as independent embodiments, and steps S2101+S2102+S2103 can be implemented as independent embodiments, but the present invention is not limited thereto.

[0135] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0136] In this embodiment, the first terminal sends the first information, the second terminal sends the second information to the first terminal based on the first information, the second terminal sends the terminal information of the second terminal related to the first service to the first terminal, and the first terminal receives the terminal information, which can effectively update the terminal information required for the service.

[0137] FIG3A is an interactive diagram of a method for acquiring terminal information according to another embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a method for acquiring terminal information, which can be used for a first terminal. The method includes:

[0138] Step S3101: Send first information, where the first information is used to request subscription of terminal information related to the first service of the second terminal.

[0139] Step S3102: Receive terminal information sent by the second terminal.

[0140] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S3101 and S3102. For example, step S3101 can be implemented as an independent embodiment, step S3102 can be implemented as an independent embodiment, and so on, but the present invention is not limited thereto. Steps S3101 and S3102 can be implemented as independent embodiments, but the present invention is not limited thereto.

[0141] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0142] FIG3B is an interactive diagram of a method for acquiring terminal information according to another embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a method for acquiring terminal information, which can be used for a first terminal. The method includes:

[0143] Step S3201: Send first information, where the first information is used to request subscription of terminal information related to the first service of the second terminal.

[0144] Step S3202: Receive second information sent by the second terminal, where the second information is used to instruct the second terminal to accept the subscription request for terminal information from the first terminal.

[0145] Step S3203: Receive terminal information sent by the second terminal.

[0146] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S3201 to S3203. For example, step S3201 can be implemented as an independent embodiment, step S3202 can be implemented as an independent embodiment, and so on, but the present invention is not limited thereto. Steps S3201+S3202 can be implemented as independent embodiments, but the present invention is not limited thereto.

[0147] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0148] FIG3C is an interactive diagram of a method for acquiring terminal information according to another embodiment of the present disclosure. As shown in FIG3C , the present disclosure embodiment relates to a method for acquiring terminal information, which can be used for a first terminal. The method includes:

[0149] Step S3301: Send first information, where the first information is used to request subscription of terminal information related to the first service of the second terminal.

[0150] Step S3302: Receive second information sent by the second terminal, where the second information is used to instruct the second terminal to accept the subscription request for terminal information from the first terminal.

[0151] Step S3303: Receive a notification message sent by the second terminal, where the notification message includes: new terminal information and / or updated terminal information.

[0152] Step S3304: If the first condition is met, a request is made to the second terminal to cancel the subscription to the terminal information.

[0153] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S3301 to S3304. For example, step S3301 can be implemented as an independent embodiment, step S3302 can be implemented as an independent embodiment, and so on, but the present invention is not limited thereto. Steps S3301+S3302 can be implemented as independent embodiments, but the present invention is not limited thereto.

[0154] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0155] FIG4A is an interactive diagram of a method for acquiring terminal information according to another embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a method for acquiring terminal information, which can be used for a second terminal. The method includes:

[0156] Step S4101: Receive first information, where the first information is used by a first terminal to request a subscription to terminal information related to a first service of a second terminal.

[0157] Step S4102: Send terminal information to the first terminal.

[0158] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S4101 and S4102. For example, step S4101 can be implemented as an independent embodiment, step S4102 can be implemented as an independent embodiment, and so on, but the present invention is not limited thereto. Steps S4101 and S4102 can be implemented as independent embodiments, but the present invention is not limited thereto.

[0159] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0160] FIG4B is an interactive diagram of a method for acquiring terminal information according to another embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a method for acquiring terminal information, which can be used for a second terminal. The method includes:

[0161] Step S4201: Receive first information, where the first information is used by a first terminal to request a subscription to terminal information related to a first service of a second terminal.

[0162] Step S4202: Send second information to the first terminal, where the second information is used to instruct the second terminal to accept the subscription request of the first terminal for terminal information.

[0163] Step S4203: Send terminal information to the first terminal.

[0164] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S4201 to S4203. For example, step S4201 can be implemented as an independent embodiment, step S4202 can be implemented as an independent embodiment, and so on, but the present disclosure is not limited thereto. Steps S4201+S4202 can be implemented as independent embodiments, but the present disclosure is not limited thereto.

[0165] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0166] FIG4C is an interactive diagram of a method for obtaining terminal information according to another embodiment of the present disclosure. As shown in FIG4C , the present disclosure embodiment relates to a method for obtaining terminal information, which can be used for a second terminal. The method includes:

[0167] Step S4301: Receive first information, where the first information is used by a first terminal to request to subscribe to terminal information related to a first service of a second terminal.

[0168] Step S4302: Send second information to the first terminal, where the second information is used to instruct the second terminal to accept the subscription request of the first terminal for terminal information.

[0169] Step S4303: Send a notification message to the first terminal, where the notification message includes: new terminal information and / or updated terminal information.

[0170] Step S4304: Instruct the first terminal to accept the cancellation of the subscription terminal information.

[0171] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S4301 to S4304. For example, step S4301 can be implemented as an independent embodiment, step S4302 can be implemented as an independent embodiment, and so on, but the present invention is not limited thereto. Steps S4301+S4302 can be implemented as independent embodiments, but the present invention is not limited thereto.

[0172] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0173] FIG5 is an interactive diagram of a method for acquiring terminal information according to another embodiment of the present disclosure. As shown in FIG5 , the embodiment of the present disclosure relates to a method for acquiring terminal information, which can be used in a communication system. The method includes:

[0174] Step S5101: A first terminal sends first information, where the first information is used to request a subscription to terminal information related to a first service of a second terminal.

[0175] Step S5102: The second terminal receives the first information and sends terminal information to the first terminal.

[0176] Step S5103: The first terminal receives terminal information.

[0177] The terminal information acquisition method involved in the embodiments of the present disclosure may include at least one of steps S5101 to S5103. For example, step S5101 can be implemented as an independent embodiment, step S5102 can be implemented as an independent embodiment, and so on, but the present disclosure is not limited thereto. Steps S5101+S5102 can be implemented as independent embodiments, but the present disclosure is not limited thereto.

[0178] In this embodiment or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other embodiments or other examples.

[0179] In the disclosed embodiments, terminal information required for a service can be updated effectively and timely.

[0180] Include at least one of the following:

[0181] Terminals that support terminal information-sensitive services can subscribe explicitly or implicitly, and unsubscribe explicitly or implicitly, so that they can be notified of specific terminal information when the terminal information is updated.

[0182] When the designated terminal information is updated, the terminal notifies the subscribing terminal of the updated terminal information.

[0183] When the subscription expires or is unsubscribed, the terminal stops notifying the requested terminal information.

[0184] Terminal information includes role information, coverage information, status information, and other terminal information.

[0185] The following is an exemplary introduction to the above method.

[0186] Optional embodiment:

[0187] As shown in Figure 6A, Figure 6A is a schematic diagram of terminal information transmission based on subscription in an embodiment of the present disclosure. In this embodiment, UE-1, UE-2, UE-3, a network, and an application may be included. In this embodiment, a subscription mechanism is applied to transmit updated terminal information. For example, UE-2 is the target terminal, and the application layer or network of UE-2 can trigger a ranging / SL positioning service request, and with the assistance of a positioning terminal near UE-2, request to obtain the absolute position of UE-2. UE-1 and UE-3 are near UE-2 and can support ranging / SL positioning services. UE-1 serves as the SL reference terminal, and UE-3 serves as the positioning terminal. Subscription-related processes include terminal information that needs to be notified when the subscription is updated, notification of updated terminal information as required, and unsubscription. Subscription-related processes can be executed after terminal discovery or after link establishment. The interaction messages can be signaling messages between terminals, such as PC5-S messages, or user plane messages, such as user plane messages transmitted on the link after the link is established.

[0188] 1a. UE-2 discovers that it supports the same terminal information-sensitive service as UE-3.

[0189] In some embodiments, UE-2 discovers that UE-3 supports ranging / SL positioning services and needs to update terminal information, such as the terminal role of the opposite terminal.

[0190] 1b. UE-2 has established a PC5 link with UE-3 for terminal information-sensitive services.

[0191] 2. UE-2 sends a terminal information subscription request message (an indication requesting terminal information) to UE-3.

[0192] In some embodiments, the terminal information subscription request message may be, for example, a UE information Subscribe Request.

[0193] In some embodiments, UE-2 may send a terminal information subscription request message to UE-3 to subscribe to UE-3's updated terminal information, such as the terminal role. The terminal information subscription request message includes an indication of the specific updated terminal information requested, such as the updated terminal role, an optional notification target address, a subscription expiration time (e.g., when the subscription expires based on the implementation), and a cancellation condition (e.g., when the link is released).

[0194] 3. UE-3 sends a terminal information subscription response message to UE-2.

[0195] In some embodiments, UE-3 may use a terminal information subscription response message to acknowledge receipt of the request in step 2.

[0196] In some embodiments, the terminal information subscription response message may be, for example, a UE information Subscribe Response. If the subscription is accepted, the terminal information subscription response message may include: a subscription association identifier, a subscription expiration time, and, if updated terminal information exists, the terminal information.

[0197] 4. UE-3 detects that the requested terminal information has been updated.

[0198] In some embodiments, UE-3 detects the requested updated terminal information, for example, the terminal role of UE-3 is updated to be a SL reference terminal.

[0199] 5. UE-3 sends a terminal information notification message (the requested updated terminal information) to UE-2.

[0200] In some embodiments, UE-3 notifies UE-2 of the terminal information updated in step 4.

[0201] 6. UE-2 decides to unsubscribe from the requested terminal information.

[0202] In some embodiments, UE-2 may decide to cancel the subscription to the requested terminal information. For example, when all ranging / SL positioning services are completed, the subscription may be canceled.

[0203] 7. UE-2 sends a terminal information unsubscribe request message (indication requesting terminal information) to UE-3.

[0204] In some embodiments, the terminal information unsubscribe request message may be, for example, a UE information Unsubscribe Request.

[0205] In some embodiments, UE-2 cancels subscription of UE-3's terminal information by sending a terminal information unsubscription request message carrying an indication of requesting terminal information in step 2 to UE-3.

[0206] 8. UE-3 sends a terminal information unsubscribe response message to UE-2.

[0207] In some embodiments, the terminal information unsubscribe response message may be, for example, a UE information Unsubscribe Response.

[0208] In some embodiments, UE-3 acknowledges receipt of the request in step 7 by sending a terminal information unsubscribe response message.

[0209] In the disclosed embodiments, if a link has already been established between related terminals, the link can be managed accordingly based on the updated terminal information. For example, if a service does not match the updated terminal information, the link may be released. If an ongoing service matches the updated terminal information, the link between the related terminals may remain unchanged or may need to be modified. For example, the link can be modified to delete unmatched Quality of Service (QoS) flows and add QoS flows that match the updated terminal information.

[0210] As shown in Figure 6B, Figure 6B is a schematic diagram of implicitly subscribing to updated terminal information in an embodiment of the present disclosure. In this embodiment, UE-1, UE-2, and UE-3 may be included. In this embodiment, updated terminal information is obtained through implicit subscription. For example, UE-2 is the target terminal, and the ranging / SL positioning service request can be triggered by the application layer or network of UE-2. With the assistance of the positioning terminal near UE-2, the absolute position of UE-2 is requested. UE-1 and UE-3 are near UE-2, and UE-1 and UE-3 can be used as positioning terminals. The coverage information of UE-1 and UE-3 are both within coverage. Subscription to terminal information can be achieved through a terminal discovery process or a link management process (such as a direct link establishment process or a direct link modification process). Subscription to terminal data can also be achieved through service data exchange after the link is established, such as by exchanging ranging / SL positioning-related service request messages or sidelink positioning protocol (SLPP) messages requesting location information, such as SLPP messages used for capability exchange. Figure 6A describes an example of implicitly subscribing to specified terminal information in a direct link establishment process. For other processes, the same processing logic can be followed.

[0211] 1. UE-2 discovers that it supports the same terminal information-sensitive service as UE-1 and UE-3.

[0212] In some embodiments, UE-2 discovers that UE-1 and UE-3 support ranging / SL positioning services and needs to update terminal information, such as coverage information and / or status information of the opposite terminal.

[0213] 2. UE-2 sends a direct communication request message (indication requesting terminal information) to UE-1.

[0214] 2a. UE-2 sends a direct communication request message (indication requesting terminal information) to UE-3.

[0215] In some embodiments, the direct communication request message may be, for example, a Direct Communication Request message.

[0216] In some embodiments, UE-2 sends a direct communication request message to initiate a layer 2 unicast link establishment process to UE-1 and UE-3 respectively. The direct communication request message may include:

[0217] Source user information: the application layer ID of the originating terminal (for example, the application layer ID of UE-1).

[0218] Target User Information: If a direct communication request message is sent to UE-1, the target terminal's application layer ID (e.g., UE-2's application layer ID) can be configured as UE-1's application layer ID. If a direct communication request message is sent to UE-3, the target terminal's application layer ID (e.g., UE-2's application layer ID) can be configured as UE-3's application layer ID.

[0219] Service information: Service identifier required for establishing a layer 2 link.

[0220] Security information: Information used for security establishment.

[0221] Indication of requested terminal information: such as updated coverage information and / or status information, optional notification target address, and subscription expiration time (such as the expiration time or duration of the subscription based on implementation), and cancellation conditions (such as when the link is released).

[0222] 3. Establish a secure process.

[0223] 3a. Establish a secure process.

[0224] In some embodiments, a security establishment procedure may be performed between UE-1 and UE-2, and a security establishment procedure may be performed between UE-3 and UE-2.

[0225] 4. UE-1 sends a direct communication acceptance message to UE-2.

[0226] 4a. UE-3 sends a direct communication acceptance message to UE-2.

[0227] In some embodiments, if an indication requesting terminal information is received in step 2 or 2a, when accepting the implicit subscription, the acceptance message may include: the subscription expiration time (for example, the time or duration of the subscription expiration based on the implementation), and if there is updated terminal information, the terminal information may be included.

[0228] 5. UE-3 detects that the requested terminal information has been updated.

[0229] In some embodiments, UE-3 may detect the requested new terminal information or updated terminal information, for example, the coverage information of UE-3 is updated, and / or the status information of UE-3 is updated to be a SL reference terminal.

[0230] 6. UE-3 sends a terminal information notification message (the requested updated terminal information) to UE-2.

[0231] In some embodiments, UE-3 notifies UE-2 of the updated terminal information detected in step 5.

[0232] 5a. UE-1 detects that the requested terminal information has been updated.

[0233] In some embodiments, UE-1 may detect the requested new terminal information or updated terminal information, for example, coverage information of UE-1 is updated, and / or status information of UE-1 is updated to be a SL reference terminal.

[0234] 6a. UE-1 sends a terminal information notification message (requested updated terminal information) to UE-2.

[0235] In some embodiments, UE-1 notifies UE-2 of the updated terminal information detected in step 5a.

[0236] In this embodiment, the indicated terminal information can be unsubscribed explicitly or implicitly. For example, unsubscribing can be performed by initiating a new link modification procedure without including a request message for "requesting terminal information indication." Alternatively, unsubscribing from the indicated terminal information can be achieved through other implementations, such as unsubscribing from the indicated terminal information when the link is released, or by configuring unsubscribing conditions so that the indicated terminal information is unsubscribed when the unsubscribing conditions are met. The unsubscribing conditions can include, for example, the unsubscribing conditions included in steps 2 or 2a, or steps 3 or 3a.

[0237] In an embodiment of the present disclosure, if a link has been established between related terminals, the link can be managed accordingly based on the updated terminal information. For example, if there is a service that does not match the updated terminal information, the link may be released. If there is an ongoing service that matches the updated terminal information, the link between the related terminals may remain the same or may need to be modified. For example, the link can be modified to delete the unmatched Quality of Service (QoS) flow and add a QoS flow that matches the updated terminal information. In an embodiment of the present disclosure, it is possible to support the updating of terminal roles and / or coverage information and / or status information in terminal information-sensitive services, ensure the normal operation of the service, support the timely release of links that do not match the service, and avoid the introduction of irrelevant terminals into the service.

[0238] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., a RAN) in any of the above methods.

[0239] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0240] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0241] FIG7A is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in FIG7A , the terminal 7100 may include: at least one of a transceiver module 7101 and a processing module 7102. The terminal 7100 may include:

[0242] The transceiver module 7101 is configured to send first information and receive terminal information related to the first service sent by a second terminal, wherein the first information is used to request subscription to the terminal information of the second terminal.

[0243] In some embodiments of the present disclosure, the first information includes at least one of the following:

[0244] The type of terminal information requested;

[0245] Notification target address;

[0246] Subscription conditions;

[0247] Subscription expiration date;

[0248] Unsubscribe Conditions.

[0249] In some embodiments of the present disclosure, the type of terminal information includes at least one of the following:

[0250] role information of the second terminal;

[0251] coverage information of the second terminal;

[0252] status information of the second terminal;

[0253] Capability information of the second terminal.

[0254] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0255] Second information sent by the second terminal is received, wherein the second information is used to instruct the second terminal to accept the subscription request of the first terminal for terminal information.

[0256] In some embodiments of the present disclosure, the second information includes at least one of the following:

[0257] Subscription association identifier;

[0258] Subscription expiration date;

[0259] Terminal information.

[0260] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0261] A terminal information subscription request message is sent to the second terminal, wherein the terminal information subscription request message includes the first information.

[0262] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0263] A terminal information subscription response message sent by the second terminal is received, wherein the terminal information subscription response message includes the second information.

[0264] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0265] A direct communication request message is sent to the second terminal, where the direct communication request message is used to trigger establishment of a link between the first terminal and the second terminal, and the direct communication request message includes first information.

[0266] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0267] A direct communication acceptance message sent by the second terminal is received, wherein the direct communication acceptance message is used to indicate acceptance of establishing a link between the first terminal and the second terminal, and the direct communication acceptance message includes second information.

[0268] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0269] A first discovery request message is sent based on a broadcast manner, wherein the first discovery request message is used to discover the second terminal, and the first discovery request message includes first information.

[0270] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0271] A second discovery request message is sent to the second terminal, where the second discovery request message is used to discover the second terminal and includes the first information.

[0272] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0273] A discovery response message sent by the second terminal is received, wherein the discovery response message is used to indicate that the second discovery request message has been received, and the discovery response message includes second information.

[0274] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0275] A first link modification request message is sent to the second terminal, where the first link modification request message is used to request modification of a link between the first terminal and the second terminal, and the first link modification request message includes first information.

[0276] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0277] A first link modification accept message sent by the second terminal is received, wherein the first link modification accept message is used to indicate acceptance of modification of the link between the first terminal and the second terminal, and the first link modification accept message includes second information.

[0278] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0279] A notification message sent by the second terminal is received, wherein the notification message includes: new terminal information and / or updated terminal information.

[0280] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0281] A terminal information unsubscribe request message is sent to the second terminal, wherein the terminal information unsubscribe request message is used to request unsubscription of terminal information.

[0282] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0283] A terminal information unsubscription response message sent by the second terminal is received, wherein the terminal information unsubscription response message is used to indicate that the subscription to the terminal information has been cancelled.

[0284] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0285] A second link modification request message is sent to the second terminal, where the second link modification request message is used to request modification of the link between the first terminal and the second terminal and request cancellation of subscription to terminal information.

[0286] In some embodiments of the present disclosure, the transceiver module 7101 is further configured to:

[0287] A second link modification accept message sent by the second terminal is received, wherein the second link modification accept message is used to indicate acceptance of modification of the link between the first terminal and the second terminal and to indicate cancellation of subscription to terminal information.

[0288] In some embodiments of the present disclosure, the processing module 7102 is configured to:

[0289] If the first condition is met, it is determined to cancel the subscription of the terminal information.

[0290] In some embodiments of the present disclosure, satisfying the first condition includes at least one of the following:

[0291] The conditions for unsubscribing are met;

[0292] The first business has been completed;

[0293] The subscription expiration time has expired;

[0294] The link between the first terminal and the second terminal has been released.

[0295] In some embodiments of the present disclosure, the first service is ranging or sidelink (SL) positioning service.

[0296] FIG7B is a schematic diagram of the structure of a terminal proposed in another embodiment of the present disclosure. As shown in FIG7B , the terminal 7200 may include: at least one of a transceiver module 7201 and a processing module 7202. The terminal 7200 may include:

[0297] The transceiver module 7201 is configured to receive first information and send terminal information to a first terminal, wherein the first information is used by the first terminal to request the second terminal to subscribe to terminal information related to the first service.

[0298] In some embodiments of the present disclosure, the first information includes at least one of the following:

[0299] The type of terminal information requested;

[0300] Notification target address;

[0301] Subscription conditions;

[0302] Subscription expiration date;

[0303] Unsubscribe Conditions.

[0304] In some embodiments of the present disclosure, the type of terminal information includes at least one of the following:

[0305] role information of the second terminal;

[0306] coverage information of the second terminal;

[0307] status information of the second terminal;

[0308] Capability information of the second terminal.

[0309] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0310] Second information is sent to the first terminal, where the second information is used to instruct the second terminal to accept the subscription request of the first terminal for terminal information.

[0311] In some embodiments of the present disclosure, the second information includes at least one of the following:

[0312] Subscription association identifier;

[0313] Subscription expiration date;

[0314] Terminal information.

[0315] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0316] A terminal information subscription request message sent by a first terminal is received, wherein the terminal information subscription request message includes first information.

[0317] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0318] A terminal information subscription response message is sent to the first terminal, wherein the terminal information subscription response message includes the second information.

[0319] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0320] A direct communication request message sent by a first terminal is received, wherein the direct communication request message is used to trigger establishment of a link between the first terminal and a second terminal, and the direct communication request message includes first information.

[0321] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0322] A direct communication acceptance message is sent to the first terminal, wherein the direct communication acceptance message is used to indicate acceptance of establishing a link between the first terminal and the second terminal, and the direct communication acceptance message includes second information.

[0323] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0324] A first discovery request message sent by a first terminal in a broadcast manner is received, wherein the first discovery request message is used to discover a second terminal and includes first information.

[0325] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0326] A second discovery request message sent by the first terminal is received, where the second discovery request message is used to discover the second terminal and includes the first information.

[0327] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0328] A discovery response message is sent to the first terminal, wherein the discovery response message is used to indicate that the second discovery request message has been received, and the discovery response message includes second information.

[0329] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0330] A first link modification request message sent by a first terminal is received, wherein the first link modification request message is used to request modification of a link between the first terminal and a second terminal, and the first link modification request message includes first information.

[0331] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0332] A first link modification accept message is sent to the first terminal, wherein the first link modification accept message is used to indicate acceptance of modification of a link between the first terminal and the second terminal, and the first link modification accept message includes second information.

[0333] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0334] A notification message is sent to the first terminal, where the notification message includes: new terminal information and / or updated terminal information.

[0335] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0336] A terminal information unsubscription request message sent by a first terminal is received, wherein the terminal information unsubscription request message is used to request unsubscription of terminal information.

[0337] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0338] A terminal information unsubscription response message is sent to the first terminal, wherein the terminal information unsubscription response message is used to indicate that the subscription to the terminal information has been cancelled.

[0339] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0340] A second link modification request message sent by the first terminal is received, wherein the second link modification request message is used to request modification of a link between the first terminal and the second terminal and to request cancellation of subscription to terminal information.

[0341] In some embodiments of the present disclosure, the transceiver module 7201 is further configured to:

[0342] A second link modification accept message is sent to the first terminal, wherein the second link modification accept message is used to indicate acceptance of modification of the link between the first terminal and the second terminal and to indicate cancellation of subscription to terminal information.

[0343] In some embodiments of the present disclosure, the first service is ranging or sidelink (SL) positioning service.

[0344] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0345] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0346] Figure 8A is a schematic diagram of the structure of a communication device proposed in an embodiment of the present disclosure. Communication device 8100 can be a terminal, a network device, a chip, a chip system, or a processor that supports a terminal implementing any of the above methods, or a chip, a chip system, or a processor that supports a network device implementing any of the above methods. Communication device 8100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0347] As shown in Figure 8A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. The communication device 8100 is used to perform any of the above methods.

[0348] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may be located outside the communication device 8100.

[0349] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceiver 8103 performs at least one of the communication steps such as sending and / or receiving in the above method, and the processor 8101 performs the other steps.

[0350] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0351] In some embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuit 8104 is connected to the memory 8102. The interface circuit 8104 may be configured to receive signals from the memory 8102 or other devices, and may be configured to send signals to the memory 8102 or other devices. For example, the interface circuit 8104 may read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0352] The communication device 8100 described in the above embodiments may be a terminal, a network device, or a third entity, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0353] FIG8B is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG8B , but the present disclosure is not limited thereto.

[0354] The chip 8200 includes one or more processors 8201 , and the chip 8200 is configured to execute any of the above methods.

[0355] In some embodiments, the chip 8200 further includes one or more interface circuits 8202. Optionally, the interface circuit 8202 is connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and can be used to send signals to the memory 8203 or other devices. For example, the interface circuit 8202 can read instructions stored in the memory 8203 and send the instructions to the processor 8201.

[0356] In some embodiments, the interface circuit 8202 performs at least one of the communication steps such as sending and / or receiving in the above method, and the processor 8201 performs the other steps.

[0357] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0358] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0359] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0360] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0361] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0362] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0363] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0364] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific workflows of the systems, devices, and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0365] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for obtaining terminal information, characterized in that, Executed by a first terminal, the method includes: Sending first information, where the first information is used to request subscribing to terminal information related to a first service of a second terminal; Receiving the terminal information sent by the second terminal.

2. The method according to claim 1, characterized in that, The first information includes at least one of the following: Type of the requested terminal information; Notification target address; Subscription condition; Subscription expiration time; Unsubscription condition.

3. The method according to any one of claims 1-2, characterized in that, The type of the terminal information includes at least one of the following: Role information of the second terminal; Coverage information of the second terminal; Status information of the second terminal; Capability information of the second terminal.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: Receiving second information sent by the second terminal, where the second information is used to indicate that the second terminal accepts the subscription request of the first terminal for the terminal information.

5. The method according to claim 4, wherein The second information includes at least one of the following: Subscription association identifier; Subscription expiration time; The terminal information.

6. The method according to any one of claims 4-5, characterized in that, The sending of the first information includes: Sending a terminal information subscription request message to the second terminal, where the terminal information subscription request message includes the first information.

7. The method according to claim 6, characterized in that, The receiving of the second information sent by the second terminal includes: Receiving a terminal information subscription response message sent by the second terminal, where the terminal information subscription response message includes the second information.

8. The method according to any one of claims 4-5, characterized in that The sending of the first information includes: Sending a direct communication request message to the second terminal, where the direct communication request message is used to trigger the establishment of a link between the first terminal and the second terminal, and the direct communication request message includes the first information.

9. The method according to claim 8, characterized in that, The receiving of the second information sent by the second terminal includes: Receiving a direct communication acceptance message sent by the second terminal, where the direct communication acceptance message is used to indicate acceptance of the establishment of a link between the first terminal and the second terminal, and the direct communication acceptance message includes the second information.

10. The method according to any one of claims 4-5, characterized in that, The sending of the first information includes: Sending a first discovery request message based on a broadcast mode, where the first discovery request message is used to discover the second terminal, and the first discovery request message includes the first information.

11. The method according to any one of claims 4-5, characterized in that, The sending of the first information includes: Sending a second discovery request message to the second terminal, where the second discovery request message is used to discover the second terminal, and the second discovery request message includes the first information.

12. The method according to claim 11, wherein The receiving of the second information sent by the second terminal includes: Receiving a discovery response message sent by the second terminal, where the discovery response message is used to indicate receipt of the second discovery request message, and the discovery response message includes the second information.

13. The method according to any one of claims 4-5, characterized in that, The sending of the first information includes: Sending a first link modification request message to the second terminal, where the first link modification request message is used to request modification of the link between the first terminal and the second terminal, and the first link modification request message includes the first information.

14. The method according to claim 13, wherein The receiving of the second information sent by the second terminal includes: Receive a first link modification acceptance message sent by the second terminal, where the first link modification acceptance message is used to indicate acceptance of modifying the link between the first terminal and the second terminal, and the first link modification acceptance message includes the second information.

15. The method according to any one of claims 1 to 14, characterized in that The method further includes: Receive a notification message sent by the second terminal, where the notification message includes: new terminal information and / or updated terminal information.

16. The method according to any one of claims 1-7 and 15, characterized in that, The method further includes: Send a terminal information unsubscribe request message to the second terminal, where the terminal information unsubscribe request message is used to request cancellation of the subscription to the terminal information.

17. The method according to claim 16, wherein The method further includes: Receive a terminal information unsubscribe response message sent by the second terminal, where the terminal information unsubscribe response message is used to indicate that the subscription to the terminal information has been cancelled.

18. The method according to any one of claims 1-5, 8-15, characterized in that, The method further includes: Send a second link modification request message to the second terminal, where the second link modification request message is used to request modification of the link between the first terminal and the second terminal and to request cancellation of the subscription to the terminal information.

19. The method according to claim 18, wherein The method further includes: Receive a second link modification acceptance message sent by the second terminal, where the second link modification acceptance message is used to indicate acceptance of modifying the link between the first terminal and the second terminal and to indicate that the subscription to the terminal information has been cancelled.

20. The method according to any one of claims 1-19, characterized in that, The method further includes: When a first condition is met, determine to cancel the subscription to the terminal information.

21. The method according to claim 20, wherein The meeting of the first condition includes at least one of the following: The unsubscribe condition is met; The first service has been completed; The subscription expiration time has expired; The link between the first terminal and the second terminal has been released.

22. The method according to any one of claims 1-21, characterized in that, The first service is a ranging or sidelink SL positioning service.

23. A method for obtaining terminal information, characterized in that, Performed by a second terminal, the method includes: Receive first information, where the first information is used for a first terminal to request a subscription to terminal information of the second terminal related to a first service; Send the terminal information to the first terminal.

24. The method according to claim 23, wherein The first information includes at least one of the following: The type of the requested terminal information; The notification target address; The subscription condition; The subscription expiration time; The unsubscribe condition.

25. The method according to any one of claims 23-24, characterized in that, The type of the terminal information includes at least one of the following: The role information of the second terminal; The coverage information of the second terminal; The status information of the second terminal; The capability information of the second terminal.

26. The method according to any one of claims 23-25, characterized in that, The method further includes: Send second information to the first terminal, where the second information is used to indicate that the second terminal accepts the subscription request of the first terminal to the terminal information.

27. The method according to claim 26, wherein The second information includes at least one of the following: The subscription association identifier; The subscription expiration time; The terminal information.

28. The method according to any one of claims 26-27, characterized in that, The receiving of the first information includes: Receive a terminal information subscription request message sent by the first terminal, where the terminal information subscription request message includes the first information.

29. The method according to claim 28, wherein The sending of the second information to the first terminal includes: Send a terminal information subscription response message to the first terminal, where the terminal information subscription response message includes the second information.

30. The method according to any one of claims 26-27, characterized in that, The receiving of the first information includes: Receive a direct communication request message sent by the first terminal, where the direct communication request message is used to trigger the establishment of a link between the first terminal and the second terminal, and the direct communication request message includes the first information.

31. The method according to claim 30, wherein The sending the second information to the first terminal includes: Send a direct communication acceptance message to the first terminal, where the direct communication acceptance message is used to indicate acceptance of the establishment of a link between the first terminal and the second terminal, and the direct communication acceptance message includes the second information.

32. The method according to any one of claims 26-27, characterized in that, The receiving the first information includes: Receive a first discovery request message sent by the first terminal based on a broadcast method, where the first discovery request message is used to discover the second terminal, and the first discovery request message includes the first information.

33. The method according to any one of claims 26-27, characterized in that, The receiving the first information includes: Receive a second discovery request message sent by the first terminal, where the second discovery request message is used to discover the second terminal, and the second discovery request message includes the first information.

34. The method according to claim 33, wherein The sending the second information to the first terminal includes: Send a discovery response message to the first terminal, where the discovery response message is used to indicate that the second discovery request message has been received, and the discovery response message includes the second information.

35. The method according to any one of claims 26-27, characterized in that, The receiving the first information includes: Receive a first link modification request message sent by the first terminal, where the first link modification request message is used to request modification of the link between the first terminal and the second terminal, and the first link modification request message includes the first information.

36. The method according to claim 35, wherein The sending the second information to the first terminal includes: Send a first link modification acceptance message to the first terminal, where the first link modification acceptance message is used to indicate acceptance of the modification of the link between the first terminal and the second terminal, and the first link modification acceptance message includes the second information.

37. The method according to any one of claims 23 - 35, characterized in that, The method further includes: Send a notification message to the first terminal, where the notification message includes: new terminal information and / or updated terminal information.

38. The method according to any one of claims 23-29, 37, characterized in that, The method further includes: Receive a terminal information unsubscribe request message sent by the first terminal, where the terminal information unsubscribe request message is used to request cancellation of the subscription to the terminal information.

39. The method according to claim 38, wherein The method further includes: Send a terminal information unsubscribe response message to the first terminal, where the terminal information unsubscribe response message is used to indicate that the subscription to the terminal information has been cancelled.

40. The method according to any one of claims 23-27, 30-37, characterized in that, The method further includes: Receive a second link modification request message sent by the first terminal, where the second link modification request message is used to request modification of the link between the first terminal and the second terminal and to request cancellation of the subscription to the terminal information.

41. The method according to claim 40, wherein, The method further includes: Send a second link modification acceptance message to the first terminal, where the second link modification acceptance message is used to indicate acceptance of the modification of the link between the first terminal and the second terminal and to indicate that the subscription to the terminal information has been cancelled.

42. The method according to any one of claims 23 to 41, characterized in that, The first service is ranging or sidelink SL positioning service.

43. A method for obtaining terminal information, characterized in that, The method includes: The first terminal sends a first message, where the first message is used to request to subscribe to the terminal information related to a first service of the second terminal; The second terminal receives the first message and sends the terminal information to the first terminal; The first terminal receives the terminal information.

44. A terminal, characterized in that, The terminal includes: A transceiver module, configured to send the first message and receive the terminal information related to the first service sent by the second terminal, where the first message is used to request to subscribe to the terminal information of the second terminal; or configured to receive the first message and send the terminal information to the first terminal.

45. A communication device, characterized in that, Comprising: One or more processors; Wherein, the processor is configured to execute the terminal information acquisition method according to any one of claims 1-43.

46. A storage medium, the storage medium stores instructions, characterized in that, When the instruction runs on a communication device, the communication device is caused to execute the terminal information acquisition method according to any one of claims 1-43.

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