Terminal discovery method, communication device, communication system, and storage medium

Abstract

The present disclosure relates to a terminal discovery method, a communication device, a communication system, and a storage medium. The method comprises: a first terminal sends first information on the basis of a first mode, wherein the first information is used for discovering at least one second terminal related to a first service, and the first mode is a mode in which information is sent by broadcasting. Thus, in the mode in which the information is sent by broadcasting, the first terminal is effectively supported to discover one or more specified second terminals related to the first service.

Description

Terminal discovery 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 discovery method, communication equipment, 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 discovery method, a network device, a terminal, a device, a chip system, a storage medium, a computer program, and a computer program product, which can be applied in the field of communication technology to solve the technical problem that "in a mode of sending information based on broadcasting, a first terminal is not supported to discover one or more specified second terminals."

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

[0006] According to the first aspect of an embodiment of the present disclosure, a terminal discovery method is proposed, which is executed by a first terminal, including: sending first information based on a first mode, wherein the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner.

[0007] According to a second aspect of an embodiment of the present disclosure, a terminal discovery method is proposed, which is executed by a second terminal, including: receiving first information, wherein the first information is sent based on a first mode, the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner; determining second information, wherein the second information is used to indicate whether the second terminal matches the second terminal described by the first information.

[0008] According to a third aspect of an embodiment of the present disclosure, a terminal discovery method is proposed, including: a first terminal sends first information based on a first mode, wherein the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner; the second terminal receives the first information and determines second information, wherein the second information is used to indicate whether the second terminal matches the second terminal described by the first 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 based on a first mode, wherein the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner.

[0010] According to the fifth aspect of an embodiment of the present disclosure, a terminal is proposed, including: a transceiver module for receiving first information, wherein the first information is sent based on a first mode, the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner; a processing module for determining second information, wherein the second information is used to indicate whether the second terminal matches the second terminal described in the first information.

[0011] According to the sixth 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 discovery method of any one of the first aspect, the second aspect, and the third aspect.

[0012] According to the seventh 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 discovery method of the first aspect, and the second terminal is configured to implement the terminal discovery method of the second aspect.

[0013] According to the eighth 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 discovery method as described in any one of the first, second, and third aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

[0016] FIG2 is an interactive diagram illustrating a terminal discovery method according to an embodiment of the present disclosure;

[0017] FIG3A is an interactive schematic diagram illustrating a terminal discovery method according to another embodiment of the present disclosure;

[0018] FIG3B is an interactive diagram illustrating a terminal discovery method according to another embodiment of the present disclosure;

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

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

[0021] FIG5 is an interactive diagram illustrating a terminal discovery method according to yet another embodiment of the present disclosure;

[0022] FIG6A is a schematic diagram of a UE discovery process in ranging or SL positioning in mode A according to an embodiment of the present disclosure;

[0023] FIG6B is a schematic diagram of a group member discovery process in ranging or SL positioning in mode A in an embodiment of the present disclosure;

[0024] FIG6C is a schematic diagram of a 5G ProSe direct discovery process in mode A in an embodiment of the present disclosure;

[0025] FIG6D is a schematic diagram of a group member discovery process based on mode A in an embodiment of the present disclosure;

[0026] FIG7A is a schematic structural diagram of a terminal proposed in an embodiment of the present disclosure;

[0027] FIG7B is a schematic structural diagram of a terminal proposed in another embodiment of the present disclosure;

[0028] FIG8A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure;

[0029] FIG8B is a schematic diagram of the structure of the chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] The present disclosure provides a terminal discovery method, communication device, communication system, and storage medium. In some embodiments, the terms "terminal discovery method," "information processing method," and "communication method" are interchangeable; the terms "terminal discovery device," "information processing device," and "communication device" are interchangeable; and the terms "information processing system" and "communication system" are interchangeable.

[0031] 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.

[0032] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, 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 based on their inherent logical relationships.

[0033] 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.

[0034] 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.

[0035] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0036] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0045] 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.

[0046] 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.

[0047] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0048] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0049] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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.

[0057] 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).

[0058] 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.

[0059] Optionally, during the network-assisted sidelink positioning process, the position of the located terminal can be estimated with the help of the network by using the position of one or more positioning terminals, and the distance and / or direction between the positioning terminal and the located terminal, without limitation.

[0060] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0061] Optionally, one or more positioning terminals may be discovered by the terminal or core network device to support network-assisted sidelink positioning, which is not limited.

[0062] Optionally, a terminal with a non-access stratum (NAS) signaling connection is in the CM-Connected state and can interact with the 5G core network (5G Core, 5GC) to estimate the terminal's location with the help of the network.

[0063] Optionally, when the LMF network element determines to use network-assisted sidelink positioning, the LMF network element may trigger the target terminal to perform positioning terminal discovery.

[0064] Optionally, to assist the target terminal, a Location Management Function (LMF) network element may provide the target terminal with a list of candidate positioning terminals. In this case, the LMF may maintain a list of candidate positioning terminals, which may include, for example, capabilities and location information of the positioning terminals.

[0065] Optionally, terminal discovery may be performed based on Mode A and Mode B.

[0066] Optionally, mode A may use a single discovery protocol message (Announcement), and the terminal that publishes the message sends a terminal discovery announcement message, wherein the terminal discovery announcement message may include: discovery message type and announcer information.

[0067] Optionally, mode B can use two discovery protocol messages (request and response), and the discovery terminal sends a terminal discovery announcement message, which may include: discovery message type, discoverer information and optional target information, wherein other discovery terminals that match the parameters contained in the terminal discovery announcement message (such as target information) send response messages to the discovery terminal.

[0068] Optionally, group member discovery can be performed based on Mode A and Mode B. Compared to general terminal discovery, the corresponding announcement message can include an application layer group identifier (IDentifier, ID). Group member discovery means that associated terminals can discover each other, and the mutual association can be sharing the same application layer group ID.

[0069] Optionally, mode A involves a terminal announcing "I am here". In mode A, two roles are defined for terminals that participate in Proximity Services (ProSe) direct discovery and have ProSe enabled:

[0070] Announcement terminal: An announcement terminal can announce some information, which can be used by nearby terminals with discovery permissions.

[0071] Monitoring terminal: A terminal that monitors some interesting information published by the announcement terminal.

[0072] In mode A, the advertising terminal broadcasts discovery messages at a predefined discovery interval, and the listening terminals that are interested in these messages read and process them.

[0073] Optionally, mode B involves a terminal asking "Who's there?" and / or "Are you there?".

[0074] When using the constrained discovery type, in mode B, two roles are defined for ProSe-enabled terminals participating in ProSe direct discovery:

[0075] Discovery Terminal: A discovery terminal may send a request message, which may contain certain information about the discovery terminal that the discovery terminal is interested in discovering.

[0076] Discovered terminal: A discovered terminal can receive a request message and can also respond with some information related to the request message of the discovered terminal.

[0077] Mode B may be equivalent to asking “Who is there?” and / or “Are you there?” The discovery terminal may send information about other UEs that wish to receive a response, for example, the information may be a ProSe application identifier corresponding to a group, and members of the group may respond.

[0078] 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.

[0079] Optionally, the ranging / SL positioning results may include: absolute position, relative position, distance and direction, depending on the service 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.

[0080] 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.

[0081] Optionally, the proximity service includes all PC5 services, for example, the proximity service ProSe identifier is "ranging / SL positioning", or the proximity service ProSe identifier is other ProSe services.

[0082] Optionally, the role of the discovered terminal (e.g., target terminal, SL reference terminal, SL positioning server terminal, positioning terminal) can be included as RSPP-specific metadata in the discovery message (for terminals supporting 5G ProSe) and the unicast link establishment message (for terminals supporting vehicle to everything (V2X)).

[0083] Optionally, when SL positioning is applied to determine the absolute position of the target terminal, the target terminal discovers and selects the positioning terminal. When the LMF network element decides to apply SL positioning to the target terminal, the LMF 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.

[0084] Optionally, when applying SL positioning to determine the relative position of a target terminal, the target terminal may find one or more SL reference terminals. Therefore, it is necessary to support communication between the target terminal and one or more terminals.

[0085] Based on this, the present disclosure proposes a terminal discovery method.

[0086] 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. Alternatively, it can be applied to proximity services. Of course, the method of the present disclosure can also be applied to any other possible service scenario.

[0087] FIG2 is an interactive diagram of a terminal discovery method according to an embodiment of the present disclosure. As shown in FIG2 , the present disclosure embodiment relates to a terminal discovery method, which can be used in a communication system 100. The method includes:

[0088] Step S2101: The first terminal determines information of at least one second terminal.

[0089] The second terminal information is used to describe the second terminal. The second terminal may refer to a terminal that expects to discover the first terminal during the implementation of the first service, or may be a terminal that the first terminal expects to discover. For example, the first terminal may broadcast information about the terminal itself and information about a second terminal that expects to discover the terminal itself, in the hope of being discovered by other terminals that meet the second terminal information. The second terminal may, for example, be an optional example of another terminal. The relationship between the first terminal and the second terminal discovery is mutual, that is, the first terminal can be discovered by the second terminal, and the second terminal can also be discovered by the first terminal, without limitation.

[0090] In some embodiments, the first terminal can determine at least one piece of information (which may also be referred to as second terminal information) that can be used to describe the second terminal role. In this case, any terminal that meets the second terminal role may also be referred to as the second terminal. The first terminal can determine at least one piece of second terminal information, which may also be a second terminal identifier. In this case, the terminal corresponding to the second terminal identifier may be referred to as the second terminal, without limitation.

[0091] The information used to describe the second terminal may be referred to as second terminal information. In some embodiments, the second terminal information includes at least one of the following: a second terminal identifier, role information of the second terminal, and Ranging and Sidelink Positioning Protocol (RSPP) metadata information, wherein the RSPP metadata information includes the role information of the second terminal. This effectively improves the accuracy of the second terminal information indication.

[0092] In some embodiments, the second terminal identifier is, for example, an application layer identifier (IDentifier, ID) of the second terminal.

[0093] In some embodiments, the role information of the second terminal can be used to indicate the terminal role corresponding to the second terminal in the first service. The terminal role is, for example, a target terminal, an SL reference terminal, an SL positioning server terminal, or a positioning terminal, without limitation.

[0094] In some embodiments, the role information of the second terminal may be carried by the second terminal information, such as included in the second terminal information. For example, each second terminal has a corresponding second terminal information, and each second terminal has one or more role information.

[0095] In some embodiments, the role information of the second terminal may be carried by RSPP metadata information, for example, included in the RSPP metadata information, which in turn is included in the second terminal information. For example, each second terminal has a corresponding RSPP metadata information, and this RSPP metadata information includes role information, so each terminal has one or more role information. Of course, the RSPP metadata information may also include any other possible information, without limitation.

[0096] In some embodiments, the role information of different second terminals may be the same or different.

[0097] In some embodiments, the second terminal information is determined based on the following methods: obtaining the second terminal information provided by the service application layer of the first terminal; and receiving the second terminal information sent by the core network device.

[0098] For example, the service application layer of the first terminal may provide the at least one second terminal information, and the core network device may also deliver the at least one second terminal information.

[0099] In some embodiments, the first service is a proximity based service, which can be effectively applied to at least one terminal discovery based on the first mode in the proximity based service, and corresponding information is specified as a discovery condition during the discovery process.

[0100] In some embodiments, the first service is a ranging or sidelink (SL) positioning service, which can be effectively applied to at least one terminal discovery based on the first mode in the ranging or sidelink (SL) positioning service, and corresponding information is specified as a discovery condition during the discovery process.

[0101] Step S2102: The first terminal sends first information based on the first mode.

[0102] In some embodiments, the first mode may be mode A, for example.

[0103] In some embodiments, after determining the information of at least one second terminal, the first terminal may trigger a process of discovering at least one second terminal.

[0104] In some embodiments, the first terminal may send first information to discover at least one second terminal related to the first service based on the first information. The first mode is a mode of sending information in a broadcast manner.

[0105] In some embodiments, the first terminal sends the first information based on the first mode. For example, the first terminal sends the first information based on a broadcast manner.

[0106] In some embodiments, the first information is used to discover at least one second terminal associated with the first service in the first mode, or the first information is used to discover at least one second terminal in a terminal group associated with the first service in the first mode. This effectively improves the flexibility and accuracy of the first information indication and is effectively applicable to personalized terminal discovery scenarios.

[0107] In some embodiments, the first information includes at least one of the following: discovery message type; security protection element; proximity service ProSe application code; ProSe constraint code; Public Land Mobile Network (PLMN) information serving the first terminal; first terminal information, the first terminal information is used to describe the first terminal; destination layer 2 identifier, the destination layer 2 identifier is used for the second terminal to receive the first information; a second terminal list, the second terminal list includes: at least one second terminal information, the second terminal information is used to describe the second terminal; Ranging and Sidelink Positioning Protocol RSPP metadata information, the RSPP metadata information includes: role information of the first terminal, and / or role information of the second terminal. In this way, the accuracy of the first information indication is improved, and it is convenient to accurately discover at least one second terminal based on the first mode. It can be effectively applied to at least one terminal discovery process based on mode A.

[0108] In some embodiments, the first information may include RSPP metadata information, which may also include role information of the first terminal. The role information of the first terminal may be used to indicate the role of the first terminal. The RSPP metadata information may also include role information of the second terminal. The role information of the second terminal may be used to indicate the role of the second terminal. The RSPP metadata information may also include both the role information of the first terminal and the role information of the second terminal.

[0109] In some embodiments, the first information may include RSPP metadata information, which may include role information of the first terminal, or the RSPP metadata information may include role information of the second terminal, or the RSPP metadata information may include role information of the first terminal and role information of the second terminal.

[0110] In some embodiments, the first information may include two RSPP metadata information, one of which includes the role information of the first terminal and the other includes the role information of the second terminal. In other words, the role information of the first terminal and the role information of the second terminal may be included in different RSPP metadata information.

[0111] In some embodiments, if the role of the first terminal matches the role information of the first terminal in the RSPP metadata information, the first terminal may trigger the sending of the first information based on the first mode.

[0112] In some embodiments, the first terminal information includes at least one of the following: a first terminal identifier; role information of the first terminal; and RSPP metadata information, wherein the RSPP metadata information includes the role information of the first terminal, thereby effectively improving the accuracy of the first terminal information indication.

[0113] In some embodiments, the first terminal information may carry the role information of the first terminal.

[0114] That is to say, the role information of the first terminal can be carried by the first terminal information, such as included in the first terminal information. For example, each first terminal has a corresponding role information, or each first terminal has a plurality of role information. Alternatively, the role information of the first terminal can be carried by RSPP metadata information, such as included in RSPP metadata information, and RSPP metadata information is included in the first terminal information. For example, each first terminal has a corresponding RSPP metadata information, and the RSPP metadata information includes role information, then each terminal has one or more role information. Of course, RSPP metadata information can also include any other possible information, and there is no limitation on this.

[0115] In the embodiment of the present disclosure, the second terminal information may be added as a discovery condition in any possible manner.

[0116] The information used to identify the second terminal may be referred to as second terminal information. In some embodiments, the second terminal information includes at least one of the following: a second terminal identifier, role information of the second terminal, and Ranging and Sidelink Positioning Protocol (RSPP) metadata information, wherein the RSPP metadata information includes the role information of the second terminal. This effectively improves the accuracy of the second terminal information indication.

[0117] In some embodiments, the second terminal identifier is, for example, an application layer identifier (IDentifier, ID) of the second terminal.

[0118] In some embodiments, the role information of the second terminal can be used to indicate the terminal role corresponding to the second terminal in the first service. The terminal role is, for example, a target terminal, an SL reference terminal, an SL positioning server terminal, or a positioning terminal, without limitation.

[0119] In some embodiments, the role information of the second terminal may be carried by the second terminal information, such as included in the second terminal information. For example, each second terminal has a corresponding second terminal information, and each second terminal has one or more role information.

[0120] In some embodiments, the role information of the second terminal may be carried by RSPP metadata information, for example, included in the RSPP metadata information. The RSPP metadata information may be directly included in the first information, or the RSPP metadata information may be included in the second terminal information. For example, if each second terminal has a corresponding RSPP metadata information, and this RSPP metadata information includes role information, then each terminal has one or more pieces of role information. Of course, the RSPP metadata information may also include any other possible information, without limitation.

[0121] In some embodiments, the role information of different second terminals may be the same or different.

[0122] In some embodiments, the second terminal identifier, the role information of the second terminal, and the RSPP metadata information may be added in any possible manner, wherein the RSPP metadata information includes: one or more items of the role information of the second terminal as discovery conditions to discover the second terminal, without limitation.

[0123] The first terminal identifier is used to identify the first terminal, and is, for example, an application layer ID of the first terminal.

[0124] The destination layer 2 identifier refers to the layer 2 identifier (eg, Layer-2 ID) of the opposite terminal used to send the first information.

[0125] In some embodiments, the first information includes at least one of the following: a discovery message type; a security protection element; a terminal group identifier, which is used to describe the terminal group; PLMN information serving the first terminal; first terminal information, which is used to describe the first terminal; a destination layer 2 identifier, which is used by a second terminal to receive the first information; a second terminal list, which includes at least one second terminal information, which is used to describe the second terminal; and RSPP metadata information, which includes role information of the first terminal and / or role information of the second terminal. This improves the accuracy of the first information indication and facilitates accurate discovery of at least one second terminal based on the first mode. This can be effectively applied to the discovery process of at least one group member terminal based on mode A.

[0126] Step S2103: The second terminal determines second information, where the second information is used to indicate whether the second terminal matches the second terminal described in the first information.

[0127] In some embodiments, after receiving the first information, the second terminal may determine whether the second terminal matches the second terminal described in the first information. For example, the second terminal may determine the second information to indicate whether the second terminal matches the second terminal described in the first information based on the second information.

[0128] In some embodiments, the second information is used to indicate whether the second terminal matches the second terminal described in the first information. The second terminal described in the first information may be, for example, the second terminal indicated by the first information, such as one or more second terminals described by one or more second terminal information included in the second terminal list in the first information; or, one or more second terminals described by the role information of the second terminal included in the RSPP metadata information in the first information; or, one or more second terminals described by the role information of the second terminal in the first information, without limitation.

[0129] In some embodiments, the second terminal matches the second terminal described in the first information, including at least one of the following: the second terminal information of the second terminal matches a second terminal information in the second terminal list in the first information; the second terminal matches the RSPP metadata information in the first information; the second terminal matches the role information of the second terminal in the first information; the second terminal belongs to the terminal group described by the terminal group identifier in the first information.

[0130] In some embodiments, the RSPP metadata information in the first message may further include role information of the second terminal. The second terminal matches the RSPP metadata information in the first message, for example, by matching the role information of the second terminal in the RSPP metadata information in the first message.

[0131] The above four matching methods can be combined in any form. For example, the second terminal information of the second terminal matches one of the second terminal information in the second terminal list in the first information, and the second terminal matches the RSPP metadata information in the first information (wherein the RSPP metadata information in the first information may also include the role information of the second terminal). Or the second terminal information of the second terminal matches one of the second terminal information in the second terminal list in the first information, and the second terminal matches the role information of the second terminal in the first information. Or the second terminal belongs to the terminal group in the first information, and the second terminal matches the RSPP metadata information in the first information (wherein the RSPP metadata information in the first information may also include the role information of the second terminal). And so on.

[0132] In some embodiments, the second terminal information of the second terminal matches one of the second terminal information in the second terminal list in the first information. For example, the second terminal identifier matches one of the second terminal identifiers in the second terminal list in the first information; or the second terminal role information matches one of the second terminal role information in the second terminal list in the first information; or the second terminal identifier matches one of the second terminal identifiers in the second terminal list in the first information, and the second terminal role information matches one of the second terminal role information in the second terminal list in the first information. Thus, in the first mode, it is possible to effectively determine whether the second terminal matches the first information, which is effectively applicable to personalized terminal discovery scenarios.

[0133] Step S2104: Determine that the second terminal matches the second terminal described in the first information, and establish a link for the first service with the first terminal.

[0134] In some embodiments, if the second terminal determines that the terminal matches the first information, the second terminal may trigger a subsequent process. For example, the second terminal may trigger the establishment of a link for the first service with the first terminal.

[0135] Step S2105: Determine that the second terminal does not match the first information and do not perform corresponding processing.

[0136] In some embodiments, if the second terminal determines that the terminal does not match the first information, no corresponding processing may be performed. For example, the second terminal may not trigger the establishment of a link for the first service with the first terminal.

[0137] In some embodiments, all second terminals indicated in the first information may trigger establishment of a link for the first service with the first terminal to support effective implementation of the first service.

[0138] Of course, in some embodiments, if the first terminal fails to successfully discover all designated second terminals based on the first mode, it may trigger sending of the first information again to support being discovered by all designated second terminals.

[0139] The terminal discovery method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2105. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, and so on, but are not limited thereto. Steps S2101+S2102 can be implemented as independent embodiments, and steps S2101+S2102+S2103 can be implemented as independent embodiments, but are not limited thereto.

[0140] 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.

[0141] In this embodiment, the first terminal determines at least one second terminal information, sends the first information based on the first mode, and the second terminal determines the second information, the second information is used to indicate whether the second terminal matches the second terminal described by the first information, determines that the second terminal matches the second terminal described by the first information, establishes a link with the first terminal for the first service, determines that the second terminal does not match the first information, and does not perform corresponding processing. In a mode of sending information based on broadcasting, it effectively supports the first terminal to discover one or more second terminals related to the first service and specified, or to be discovered by one or more second terminals related to the first service and specified. In the first mode, it can effectively determine whether the second terminal matches the first information, and is effectively applicable to personalized terminal discovery scenarios.

[0142] FIG3A is an interactive diagram of a terminal discovery method according to another embodiment of the present disclosure. As shown in FIG3A , the present disclosure embodiment relates to a terminal discovery method that can be used for a first terminal. The method includes:

[0143] Step S3101: Send first information based on a first mode, wherein the first information is used to discover at least one second terminal related to a first service. The first mode is a mode of sending information in a broadcast manner.

[0144] The terminal discovery method involved in the embodiment of the present disclosure may include step S3101. For example, step S3201 may be implemented as an independent embodiment, but is not limited thereto.

[0145] 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.

[0146] FIG3B is an interactive diagram of a terminal discovery method according to another embodiment of the present disclosure. As shown in FIG3B , the present disclosure embodiment relates to a terminal discovery method that can be used for a first terminal. The method includes:

[0147] Step S3201: Acquire the second terminal information provided by the service application layer of the first terminal; or receive the second terminal information sent by the core network device.

[0148] Step S3202: Send first information based on the first mode, wherein the first information is used to discover at least one second terminal related to the first service. The first mode is a mode of sending information in a broadcast manner.

[0149] The terminal discovery method involved in the embodiments of the present disclosure may include at least one of steps S3201 and S3202. For example, step S3201 may be implemented as an independent embodiment, step S3202 may be implemented as an independent embodiment, and so on, but the present disclosure is not limited thereto. Steps S3201 and S3202 may be implemented as independent embodiments, but the present disclosure is not limited thereto.

[0150] 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.

[0151] FIG4A is an interactive diagram of a terminal discovery method according to another embodiment of the present disclosure. As shown in FIG4A , the present disclosure embodiment relates to a terminal discovery method that can be used for a second terminal. The method includes:

[0152] Step S4101: Receive first information, wherein the first information is sent based on a first mode, the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner.

[0153] Step S4102: Determine second information, where the second information is used to indicate whether the second terminal matches the second terminal described in the first information.

[0154] The terminal discovery method involved in the embodiments of the present disclosure may include at least one of steps S4101 and S4102. For example, step S4101 may be implemented as an independent embodiment, step S4102 may be implemented as an independent embodiment, and so on, but the present disclosure is not limited thereto. Steps S4101 and S4102 may be implemented as independent embodiments, but the present disclosure is not limited thereto.

[0155] 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.

[0156] FIG4B is an interactive diagram of a terminal discovery method according to another embodiment of the present disclosure. As shown in FIG4B , the present disclosure embodiment relates to a terminal discovery method that can be used for a second terminal. The method includes:

[0157] Step S4201: Receive first information, wherein the first information is sent based on a first mode, the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner.

[0158] Step S4202: Determine that the second terminal indicated by the second information matches the second terminal described by the first information, and establish a link for the first service with the first terminal.

[0159] The terminal discovery method involved in the embodiments of the present disclosure may include at least one of steps S4201 and S4202. 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 invention is not limited thereto. Steps S4201+S4202 can be implemented as independent embodiments, but the present invention is not limited thereto.

[0160] 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.

[0161] FIG5 is an interactive diagram of a terminal discovery method according to another embodiment of the present disclosure. As shown in FIG5 , the embodiment of the present disclosure relates to a terminal discovery method that can be used in a communication system. The method includes:

[0162] In step S5101, a first terminal sends first information based on a first mode, wherein the first information is used to discover at least one second terminal related to a first service. The first mode is a mode of sending information in a broadcast manner.

[0163] Step S5102: The second terminal receives the first information and determines second information, where the second information is used to indicate whether the second terminal matches the second terminal described in the first information.

[0164] The terminal discovery method involved in the embodiments of the present disclosure may include at least one of steps S5101 and S5102. 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 invention is not limited thereto. Steps S5101+S5102 can be implemented as independent embodiments, but the present invention 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] The following is an exemplary introduction to the above method.

[0167] Optional embodiment:

[0168] In the embodiments of the present disclosure, a discovery mechanism using Mode A is provided to support communication with one or more specified terminals. When an announcement terminal is triggered to communicate with multiple terminals, it initiates a discovery process carrying information of one or more terminals based on the information of one or more terminals specified by the service, thereby enabling discovery by one or more specified terminals. This includes:

[0169] The advertising terminal includes information of one or more designated terminals in the discovery advertising message to indicate that it has been discovered by the designated terminals.

[0170] The listening terminal selects an advertising terminal based on the discovery announcement message sent by the advertising terminal. For example, the listening terminal can match its own information with the information of one or more terminals in the discovery announcement message. If there is a match, the advertising terminal is selected; if there is no match, no action is taken.

[0171] In the embodiment of the present disclosure, the first service is a ranging / SL positioning service as an example, the first terminal is UE-1 (announcement terminal), and the second terminal is UE-2, UE-3, and UE-4 (listening terminals) as an example. As shown in Figure 6A, Figure 6A is a schematic diagram of the UE discovery process in ranging or SL positioning in mode A in the embodiment of the present disclosure. Figure 6A shows the terminal discovery process with 5G ProSe function in ranging / SL positioning using mode A.

[0172] 1. UE-1 sends a ranging / SL positioning announcement message.

[0173] The ranging / SL positioning announcement message may be, for example, a Ranging and Sidelink positioning Announcement message.

[0174] In some embodiments, the announcing terminal (UE-1) sends a ranging / SL positioning announcement message. The ranging / SL positioning announcement message includes a discovery message type, a security protection element, RSPP metadata information, and the user information ID of the announcing terminal, as well as information about one or more terminals that the announcing terminal expects to be discovered.

[0175] In some embodiments, a destination layer 2 identifier (Destination Layer-2 ID) for sending ranging / SL positioning announcement messages may be configured.

[0176] In some embodiments, the source layer 2 identifier (Source Layer-2 ID) for sending the ranging / SL positioning announcement message may be allocated by the announcement terminal (UE-1).

[0177] In some embodiments, if the advertising terminal is authorized as the corresponding terminal role in the RSPP metadata information, the advertising terminal sends a ranging / SL positioning advertising message.

[0178] In some embodiments, if the terminal role of the announcement terminal is a positioning terminal, the ranging / SL positioning announcement message further includes the Public Land Mobile Network (PLMN) information serving the announcement terminal.

[0179] In some embodiments, the user information ID of the advertising terminal is the application layer ID of the advertising terminal.

[0180] In some embodiments, the user information IDs of the multiple terminals that the advertising terminal expects to be discovered by the advertising terminal include the application layer IDs of the multiple terminals. For example, when the advertising terminal acts as a target terminal, the user information IDs of the multiple terminals that the advertising terminal expects to be discovered by the advertising terminal may be information of related positioning terminals or related reference terminals.

[0181] In some embodiments, the information about one or more terminals that the advertised terminal expects to be discovered by includes information about the terminals that the advertised terminal expects to be discovered by. For example, when the advertised terminal acts as a target terminal, the one or more user information IDs of the terminals that the advertised terminal expects to be discovered by the advertised terminal may be information about a related positioning terminal or a related reference terminal. This information may include the user information ID of the terminal and / or the terminal role of the terminal. Optionally, the terminal role of the terminal that the advertised terminal expects to be discovered by the advertised terminal may be included as part of the RSPP metadata information or as separate information.

[0182] In some embodiments, the monitoring terminal may determine the destination layer 2 ID of the received signaling according to the configuration.

[0183] In some embodiments, the monitoring terminal selects an announcement terminal based on the information contained in the ranging / SL positioning announcement message received in step 1. If the monitoring terminal determines that the information of the terminal matches the information of one or more terminals that the announcement terminal expects to be discovered in the ranging / SL positioning announcement message, the announcement terminal is selected and the subsequent process is triggered. For example, the matching monitoring terminal initiates a link establishment process with the announcement terminal. All terminals that the announcement terminal expects to be discovered can establish a link with the announcement terminal. For another example, unmatched monitoring terminals may not be processed accordingly.

[0184] As shown in Figure 6B, Figure 6B is a schematic diagram of the group member discovery process in ranging or SL positioning in mode A in an embodiment of the present disclosure. Figure 6B shows the group member discovery process with 5G ProSe function in ranging / SL positioning using mode A.

[0185] 1. UE-1 sends a ranging / SL positioning group member discovery announcement message.

[0186] In some embodiments, the ranging / SL positioning group member discovery announcement message may be, for example, a Ranging / SL Positioning Group member discovery Announcement message.

[0187] In some embodiments, the advertising terminal may send a ranging / SL positioning group member discovery announcement message. The ranging / SL positioning group member discovery announcement message includes the discovery message type, the advertising terminal's user ID, a group identifier (Group ID), and RSPP metadata. It may also include information about one or more terminals that the advertising terminal hopes to discover.

[0188] In some embodiments, the information about one or more terminals that the advertised terminal expects to be discovered by includes information about the terminals that the advertised terminal expects to be discovered by. For example, when the advertised terminal acts as a target terminal, the one or more user information IDs of the terminals that the advertised terminal expects to be discovered by the advertised terminal may be information about a related positioning terminal or a related reference terminal. This information may include the user information ID of the terminal and / or the terminal role of the terminal. Optionally, the terminal role of the terminal that the advertised terminal expects to be discovered by the advertised terminal may be included as part of the RSPP metadata information or as separate information.

[0189] In some embodiments, if the advertising terminal is authorized as the corresponding terminal role in the RSPP metadata information, the advertising terminal sends a ranging / SL positioning group member discovery announcement message.

[0190] In some embodiments, if the terminal role of the announcement terminal is a positioning terminal, the ranging / SL positioning group member discovery announcement message further includes PLMN information serving the announcement terminal.

[0191] In some embodiments, the user information ID of the advertising terminal is the application layer ID of the advertising terminal.

[0192] In some embodiments, the monitoring terminal selects an announcement terminal based on the information contained in the ranging / SL positioning announcement message received in step 1. If the monitoring terminal determines that the information of the terminal matches the information of one or more terminals that the announcement terminal expects to be discovered in the ranging / SL positioning announcement message, the announcement terminal is selected and the subsequent process is triggered. For example, the matching monitoring terminal initiates a link establishment process with the announcement terminal. All terminals that the announcement terminal expects to be discovered can establish a link with the announcement terminal. For another example, unmatched monitoring terminals may not be processed accordingly.

[0193] As shown in Figure 6C, Figure 6C is a schematic diagram of the 5G ProSe direct discovery process in Mode A in an embodiment of the present disclosure. Figure 6C shows a schematic diagram of 5G ProSe direct discovery based on Mode A.

[0194] 1. UE-1 sends an announcement message.

[0195] In some embodiments, the announcement message may be, for example, an Announcement message.

[0196] In some embodiments, the announcing terminal sends an announcement message. The announcement message may include the discovery message type, a ProSe application code or a ProSe constraint code, a security protection element, and metadata information. The announcement message may include application-layer metadata information. It may also include information about one or more terminals that the announcing terminal expects to be discovered.

[0197] In some embodiments, the information of one or more terminals that the terminal expects to be discovered by the advertised terminal includes: information of the terminals that the terminal expects to be discovered by the advertised terminal, which may include user IDs of the terminals and / or other information of the terminals.

[0198] In some embodiments, the monitoring terminal may determine the destination layer 2 ID of the received signaling according to the configuration.

[0199] In some embodiments, the listening terminal selects an announcement terminal based on the information contained in the announcement message received in step 1. If the listening terminal determines that its own information matches the information of one or more terminals in the announcement message, the announcement terminal is selected and subsequent processes are triggered. For example, a matching listening terminal initiates a link establishment process with the announcement terminal. All terminals that the announcement terminal expects to be discovered can establish a link with the announcement terminal. For another example, unmatched listening terminals may not be processed accordingly.

[0200] As shown in Figure 6D, Figure 6D is a schematic diagram of the group member discovery process based on mode A in an embodiment of the present disclosure. Figure 6D shows the process of discovering group members based on mode A.

[0201] 1. UE-1 sends a group member discovery announcement message.

[0202] In some embodiments, the group member discovery announcement message may be, for example, a Group Member Discovery Announcement message.

[0203] In some embodiments, the announcing terminal sends a group member discovery announcement message. The group member discovery announcement message includes the discovery message type, the user ID of the announcing terminal, a group identifier (Group ID), and RSPP metadata information. It may also include information about one or more terminals that the announcing terminal hopes to discover.

[0204] In some embodiments, the information of the one or more terminals that the terminal expects to be discovered by the advertised terminal includes: information of the terminals that the terminal expects to be discovered by the advertised terminal, which may include user information IDs of the terminals and / or other terminal information.

[0205] In some embodiments, the monitoring terminal may determine the destination layer 2 ID of the received signaling according to the configuration.

[0206] In some embodiments, the listening terminal selects an announcement terminal based on the information contained in the announcement message received in step 1. If the listening terminal determines that the information of the terminal matches the information of one or more terminals that the announcement terminal expects to be discovered in the announcement message, the announcement terminal is selected and the subsequent process is triggered. For example, the matching listening terminal initiates a link establishment process with the announcement terminal. All terminals that the announcement terminal expects to be discovered can establish a link with the announcement terminal. For another example, unmatched listening terminals may not be processed accordingly.

[0207] In an embodiment of the present disclosure, the discovery of one or more terminals triggered by the network side or the terminal side is supported. In the process of discovering the terminals, the information of one or more terminals expected to be discovered will be marked and considered, and the specified one or more terminals will be discovered in one process, and all terminals will be selected.

[0208] 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.

[0209] 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.

[0210] In the embodiment of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and execution capability, 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 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 and implementing 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 an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0211] 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:

[0212] The transceiver module 7101 is configured to send first information based on a first mode, wherein the first information is used to discover at least one second terminal related to the first service. The first mode is a mode of sending information in a broadcast manner.

[0213] In some embodiments of the present disclosure, the first information includes at least one of the following:

[0214] Discovery message type;

[0215] Safety protection elements;

[0216] Proximity Service (ProSe) application code;

[0217] ProSe constraint code;

[0218] Public land mobile network PLMN information serving the first terminal;

[0219] First terminal information, the first terminal information is used to describe the first terminal;

[0220] a destination layer 2 identifier, where the destination layer 2 identifier is used by the second terminal to receive the first information;

[0221] A second terminal list, the second terminal list including: at least one second terminal information, the second terminal information being used to describe the second terminal;

[0222] Ranging and Sidelink Positioning Protocol RSPP metadata information, the RSPP metadata information includes: role information of the first terminal and / or role information of the second terminal.

[0223] In some embodiments of the present disclosure, the first information includes at least one of the following:

[0224] Discovery message type;

[0225] Safety protection elements;

[0226] Terminal group ID, which is used to describe the terminal group;

[0227] PLMN information serving the first terminal;

[0228] First terminal information, the first terminal information is used to describe the first terminal;

[0229] a destination layer 2 identifier, where the destination layer 2 identifier is used by the second terminal to receive the first information;

[0230] A second terminal list, the second terminal list including: at least one second terminal information, the second terminal information being used to describe the second terminal;

[0231] RSPP metadata information, where the RSPP metadata information includes: role information of the first terminal and / or role information of the second terminal.

[0232] In some embodiments of the present disclosure, the first terminal information includes at least one of the following:

[0233] First terminal identification;

[0234] role information of the first terminal;

[0235] RSPP metadata information, the RSPP metadata information includes: role information of the first terminal.

[0236] In some embodiments of the present disclosure, the second terminal information includes at least one of the following:

[0237] Second terminal identification;

[0238] role information of the second terminal;

[0239] RSPP metadata information, the RSPP metadata information includes: role information of the second terminal.

[0240] In some embodiments of the present disclosure, the second terminal information is determined based on the following method:

[0241] Obtaining second terminal information provided by the service application layer of the first terminal; or,

[0242] Receive the second terminal information sent by the core network device.

[0243] In some embodiments of the present disclosure, the first terminal identifier in the first terminal information is an application layer identifier of the first terminal, and the second terminal identifier in the second terminal information is an application layer identifier of the second terminal.

[0244] In some embodiments of the present disclosure, the first service is a proximity service (ProSe), or a ranging or sidelink (SL) positioning service.

[0245] In some embodiments of the present disclosure, the first information is used to discover at least one second terminal related to the first service in the first mode, or the first information is used to discover at least one second terminal in a terminal group related to the first service in the first mode.

[0246] 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:

[0247] The transceiver module 7201 is used to receive first information, wherein the first information is sent based on a first mode, the first information is used to discover at least one second terminal related to the first service, and the first mode is a mode of sending information in a broadcast manner.

[0248] The processing module 7202 is configured to determine second information, where the second information is used to indicate whether the second terminal matches the second terminal described in the first information.

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

[0250] Discovery message type;

[0251] Safety protection elements;

[0252] Proximity Service (ProSe) application code;

[0253] ProSe constraint code;

[0254] Public land mobile network PLMN information serving the first terminal;

[0255] First terminal information, the first terminal information is used to describe the first terminal;

[0256] a destination layer 2 identifier, where the destination layer 2 identifier is used by the second terminal to receive the first information;

[0257] A second terminal list, the second terminal list including: at least one second terminal information, the second terminal information being used to describe the second terminal;

[0258] Ranging and Sidelink Positioning Protocol RSPP metadata information, the RSPP metadata information includes: role information of the first terminal and / or role information of the second terminal.

[0259] In some embodiments of the present disclosure, the first information includes at least one of the following:

[0260] Discovery message type;

[0261] Safety protection elements;

[0262] Terminal group ID, which is used to describe the terminal group;

[0263] PLMN information serving the first terminal;

[0264] First terminal information, the first terminal information is used to describe the first terminal;

[0265] a destination layer 2 identifier, where the destination layer 2 identifier is used by the second terminal to receive the first information;

[0266] A second terminal list, the second terminal list including: at least one second terminal information, the second terminal information being used to describe the second terminal;

[0267] RSPP metadata information, where the RSPP metadata information includes: role information of the first terminal and / or role information of the second terminal.

[0268] In some embodiments of the present disclosure, the first terminal information includes at least one of the following:

[0269] First terminal identification;

[0270] role information of the first terminal;

[0271] RSPP metadata information, the RSPP metadata information includes: role information of the first terminal.

[0272] In some embodiments of the present disclosure, the second terminal information includes at least one of the following:

[0273] Second terminal identification;

[0274] role information of the second terminal;

[0275] RSPP metadata information, the RSPP metadata information includes: role information of the second terminal.

[0276] In some embodiments of the present disclosure, the processing module 7202 is further configured to:

[0277] determining that the second terminal indicated by the second information matches the second terminal described by the first information;

[0278] A link for a first service is established with a first terminal.

[0279] In some embodiments of the present disclosure, the second terminal matches the second terminal described by the first information, including at least one of the following:

[0280] The second terminal information of the second terminal matches one of the second terminal information in the second terminal list in the first information;

[0281] The second terminal matches the RSPP metadata information in the first information;

[0282] The second terminal matches the role information of the second terminal in the first information;

[0283] The second terminal belongs to the terminal group described by the terminal group identifier in the first information.

[0284] In some embodiments of the present disclosure, the second terminal information of the second terminal matches one of the second terminal information in the second terminal list in the first information, including:

[0285] The identifier of the second terminal matches a second terminal identifier in the second terminal list in the first information; and / or

[0286] The role information of the second terminal matches the role information of a second terminal in the second terminal list in the first information.

[0287] In some embodiments of the present disclosure, the first terminal identifier in the first terminal information is an application layer identifier of the first terminal, and the second terminal identifier in the second terminal information is an application layer identifier of the second terminal.

[0288] In some embodiments of the present disclosure, the first service is a proximity service (ProSe), or a ranging or sidelink (SL) positioning service.

[0289] In some embodiments of the present disclosure, the first information is used to discover at least one second terminal related to the first service in the first mode, or the first information is used to discover at least one second terminal in a terminal group related to the first service in the first mode.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] The chip 8200 includes one or more processors 8201 , and the chip 8200 is configured to execute any of the above methods.

[0301] 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.

[0302] 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.

[0303] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0304] 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.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] 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)).

[0309] 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.

[0310] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes 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.

[0311] 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 terminal discovery method, characterized in that, executed by a first terminal, the method comprising: Based on a first mode, sending first information, wherein the first information is used to discover at least one second terminal related to a first service, and the first mode is a mode of sending information by broadcast.

2. The method according to claim 1, characterized in that, The first information includes at least one of the following: Discovery message type; Security protection element; Proximity service ProSe application code; ProSe constraint code; Public land mobile network PLMN information serving the first terminal; First terminal information, which is used to describe the first terminal; Destination layer 2 identifier, which is used for the second terminal to receive the first information; Second terminal list, which includes: at least one second terminal information, and the second terminal information is used to describe the second terminal; Range and sidelink positioning protocol RSPP metadata information, which includes: role information of the first terminal and / or role information of the second terminal.

3. The method according to claim 1, characterized in that, The first information includes at least one of the following: Discovery message type; Security protection element; Terminal group identifier, which is used to describe a terminal group; PLMN information serving the first terminal; First terminal information, which is used to describe the first terminal; Destination layer 2 identifier, which is used for the second terminal to receive the first information; Second terminal list, which includes: at least one second terminal information, and the second terminal information is used to describe the second terminal; RSPP metadata information, which includes: role information of the first terminal and / or role information of the second terminal.

4. The method according to any one of claims 2-3, characterized in that, The first terminal information includes at least one of the following: First terminal identifier; Role information of the first terminal; RSPP metadata information, which includes: role information of the first terminal.

5. The method according to any one of claims 2-3, characterized in that, The second terminal information includes at least one of the following: Second terminal identifier; Role information of the second terminal; RSPP metadata information, which includes: role information of the second terminal.

6. The method according to any one of claims 2-5, characterized in that, The second terminal information is determined based on the following method: Obtaining the second terminal information provided by the service application layer of the first terminal; or, Receiving the second terminal information sent by the core network device.

7. The method according to any one of claims 2-6, characterized in that, The first terminal identifier in the first terminal information is the application layer identifier of the first terminal, and the second terminal identifier in the second terminal information is the application layer identifier of the second terminal.

8. The method according to any one of claims 1-7, characterized in that, The first service is ProSe (Proximity Services), or the first service is ranging or sidelink (SL) positioning service.

9. The method according to any one of claims 1-8, wherein, the first information is used to discover at least one second terminal related to the first service in the first mode, or the first information is used to discover at least one second terminal in a group of terminals related to the first service in the first mode.

10. A terminal discovery method, wherein, executed by a second terminal, the method comprising: receiving first information, wherein the first information is sent based on a first mode, the first information is used to discover at least one second terminal related to a first service, and the first mode is a mode of sending information by broadcast; determining second information, wherein the second information is used to indicate whether the second terminal matches the second terminal described by the first information.

11. The method according to claim 10, wherein, the first information includes at least one of the following: discovery message type; security protection element; ProSe (Proximity Services) application code; ProSe constraint code; public land mobile network (PLMN) information serving the first terminal; first terminal information, which is used to describe the first terminal; destination layer 2 identifier, which is used for the second terminal to receive the first information; second terminal list, which includes: at least one second terminal information, and the second terminal information is used to describe a second terminal; ranging and sidelink positioning protocol (RSPP) metadata information, which includes: role information of the first terminal and / or role information of the second terminal.

12. The method according to claim 10, wherein, the first information includes at least one of the following: discovery message type; security protection element; terminal group identifier, which is used to describe a terminal group; PLMN information serving the first terminal; first terminal information, which is used to describe the first terminal; destination layer 2 identifier, which is used for the second terminal to receive the first information; second terminal list, which includes: at least one second terminal information, and the second terminal information is used to describe a second terminal; RSPP metadata information, which includes: role information of the first terminal and / or role information of the second terminal.

13. The method according to any one of claims 10-12, wherein, the first terminal information includes at least one of the following: first terminal identifier; role information of the first terminal; RSPP metadata information, which includes: role information of the first terminal.

14. The method according to any one of claims 10-12, wherein, the second terminal information includes at least one of the following: second terminal identifier; role information of the second terminal; RSPP metadata information, which includes: role information of the second terminal.

15. The method according to any one of claims 10 - 14, characterized in that, the method further comprises: determining that the second information indicates that the second terminal matches the second terminal described in the first information; establishing a link for the first service with the first terminal.

16. The method according to any one of claims 10 - 15, characterized in that, the matching of the second terminal with the second terminal described in the first information includes at least one of the following: the second terminal information of the second terminal matches one of the second terminal information in the second terminal list in the first information; the second terminal matches the RSPP metadata information in the first information; the second terminal matches the role information of the second terminal in the first information; the second terminal belongs to the terminal group described by the terminal group identifier in the first information.

17. The method according to claim 16, characterized in that, the matching of the second terminal information of the second terminal with one of the second terminal information in the second terminal list in the first information includes: the identifier of the second terminal matches one of the second terminal identifiers in the second terminal list in the first information; and / or the role information of the second terminal matches one of the second terminal role information in the second terminal list in the first information.

18. The method according to any one of claims 11 - 17, characterized in that, the first terminal identifier in the first terminal information is the application layer identifier of the first terminal, and the second terminal identifier in the second terminal information is the application layer identifier of the second terminal.

19. The method according to any one of claims 10 - 18, characterized in that, the first service is ProSe (Proximity Service), or the first service is ranging or sidelink SL positioning service.

20. The method according to any one of claims 10 - 19, characterized in that, the first information is used to discover at least one second terminal related to the first service in the first mode, or the first information is used to discover at least one second terminal in the terminal group related to the first service in the first mode.

21. A terminal discovery method, characterized in that, the method comprises: a first terminal sending first information based on a first mode, wherein the first information is used to discover at least one second terminal related to a first service, and the first mode is a mode of sending information by broadcasting; the second terminal receiving the first information and determining second information, wherein the second information is used to indicate whether the second terminal matches the second terminal described in the first information.

22. A terminal, characterized in that, the terminal comprises: a transceiver module for sending first information based on a first mode, wherein the first information is used to discover at least one second terminal related to a first service, and the first mode is a mode of sending information by broadcasting.

23. A terminal, characterized in that, the terminal comprises: A transceiver module, configured to receive a first piece of information, where the first piece of information is sent based on a first mode, the first piece of information is used to discover at least one second terminal related to a first service, and the first mode is a mode of sending information by broadcast; A processing module, configured to determine a second piece of information, where the second piece of information is used to indicate whether the second terminal matches the second terminal described in the first piece of information.

24. A communication device, characterized in that, comprising: one or more processors; wherein the processor is configured to execute the terminal discovery method according to any one of claims 1-21.

25. A storage medium storing instructions, characterized in that, when the instructions run on a communication device, the communication device is caused to execute the terminal discovery method according to any one of claims 1-21.

Images