WO2022198466A1 - 发现方法和终端 - Google Patents

发现方法和终端 Download PDF

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Publication number
WO2022198466A1
WO2022198466A1 PCT/CN2021/082497 CN2021082497W WO2022198466A1 WO 2022198466 A1 WO2022198466 A1 WO 2022198466A1 CN 2021082497 W CN2021082497 W CN 2021082497W WO 2022198466 A1 WO2022198466 A1 WO 2022198466A1
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WIPO (PCT)
Prior art keywords
terminal
discovery
configuration information
layer
type
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Application number
PCT/CN2021/082497
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English (en)
French (fr)
Inventor
杨皓睿
郭雅莉
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN202180078529.3A priority Critical patent/CN116602046A/zh
Priority to PCT/CN2021/082497 priority patent/WO2022198466A1/zh
Publication of WO2022198466A1 publication Critical patent/WO2022198466A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present application relates to the field of communications, and more particularly, to a discovery method and terminal.
  • NCIS Network Controlled Interactive Services
  • AR Augmented Reality
  • VR Virtual Reality
  • games have high requirements for service quality such as rate, delay, packet loss rate, and high-speed codec.
  • rate needs to be 10Gbps
  • packet loss rate cannot exceed 10E-4 (ie 10 -4 ).
  • a session established for an NCIS service is an NCIS session, and UEs in the same NCIS session can be considered to form an NCIS group, such as a team in a game.
  • Proximity Service (ProSe) topic of 5G can be used to design the solution of Proximity Service Communication.
  • ProSe can contain NCIS.
  • the embodiments of the present application provide a discovery method and a terminal, which can perform a discovery process according to a discovery type.
  • An embodiment of the present application provides a discovery method, including: a short-range service layer of a terminal performs discovery based on a discovery type of the short-range service.
  • An embodiment of the present application provides a terminal, including: a discovery unit, configured to perform discovery based on the discovery type of the short-range service through the short-range service layer.
  • An embodiment of the present application provides a terminal, including a processor and a memory.
  • the memory is used for storing a computer program
  • the processor is used for calling and running the computer program stored in the memory, so that the terminal executes the above-mentioned discovery method.
  • An embodiment of the present application provides a chip for implementing the above discovery method.
  • the chip includes: a processor for invoking and running a computer program from the memory, so that the device installed with the chip executes the above-mentioned discovery method.
  • Embodiments of the present application provide a computer-readable storage medium for storing a computer program, which, when the computer program is run by a device, causes the device to execute the above-mentioned discovery method.
  • An embodiment of the present application provides a computer program product, including computer program instructions, and the computer program instructions cause a computer to execute the above-mentioned discovery method.
  • the embodiments of the present application provide a computer program, which, when running on a computer, enables the computer to execute the above-mentioned discovery method.
  • the short-range service layer of the terminal performs discovery based on the discovery type of the short-range service, so that the terminal can distinguish different discovery types of the short-range service, which is beneficial for the terminal to perform the discovery process according to the discovery type.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present application.
  • Figure 2 is an example diagram of a 5G network system architecture.
  • FIG. 3 is a schematic flow chart of Mode A.
  • FIG. 4 is a schematic flowchart of Mode B.
  • FIG. 4 is a schematic flowchart of Mode B.
  • FIG. 5 is a schematic flow chart of establishing a PC5 connection directly.
  • FIG. 6 is a schematic flowchart of a discovery method according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of Example 1 of a discovery method according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of Example 2 of the discovery method according to an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a terminal according to an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a terminal according to another embodiment of the present application.
  • FIG. 11 is a schematic flowchart of a discovery method according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a network device according to an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a chip according to an embodiment of the present application.
  • FIG. 15 is a schematic block diagram of a communication system according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • 5G fifth-generation communication
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.
  • Carrier Aggregation, CA Carrier Aggregation, CA
  • DC Dual Connectivity
  • SA standalone
  • the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered unshared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, where the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device can be a station (STAION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, next-generation communication systems such as end devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • STAION, ST in the WLAN
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites) superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • a mobile phone Mobile Phone
  • a tablet computer Pad
  • a computer with a wireless transceiver function a virtual reality (Virtual Reality, VR) terminal device
  • augmented reality (Augmented Reality, AR) terminal Equipment wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • the network device may be a device for communicating with a mobile device, and the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA , it can also be a base station (NodeB, NB) in WCDMA, it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or in-vehicle equipment, wearable devices and NR networks
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a High Elliptical Orbit (HEO) ) satellite etc.
  • the network device may also be a base station set in a location such as land or water.
  • a network device may provide services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (
  • the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • Pico cell Femto cell (Femto cell), etc.
  • These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • FIG. 1 exemplarily shows a communication system 100 .
  • the communication system includes one network device 110 and two terminal devices 120 .
  • the communication system 100 may include multiple network devices 110, and the coverage of each network device 110 may include other numbers of terminal devices 120, which are not limited in this embodiment of the present application.
  • the communication system 100 may further include a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF) and other network entities, to which the embodiments of the present application Not limited.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • the network equipment may further include access network equipment and core network equipment. That is, the wireless communication system further includes a plurality of core networks for communicating with the access network equipment.
  • the access network equipment may be a long-term evolution (long-term evolution, LTE) system, a next-generation (mobile communication system) (next radio, NR) system, or an authorized auxiliary access long-term evolution (authorized auxiliary access long-term evolution, LAA-
  • the evolved base station (evolutional node B, may be referred to as eNB or e-NodeB for short) in the LTE) system is a macro base station, a micro base station (also called a "small base station"), a pico base station, an access point (AP), Transmission site (transmission point, TP) or new generation base station (new generation Node B, gNodeB), etc.
  • a device having a communication function in the network/system may be referred to as a communication device.
  • the communication device may include a network device and a terminal device with a communication function, and the network device and the terminal device may be specific devices in this embodiment of the application, which will not be repeated here; It may include other devices in the communication system, for example, other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship.
  • a indicates B it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • corresponding may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.
  • FIG. 2 exemplarily shows the 5G network system architecture.
  • the UE connects with the access network (AN, Access Network) through the Uu wireless interface, exchanges access layer messages and wireless data transmission, and the UE communicates with the access and mobility management functions (AMF, Access and Mobility Management) through the N1 interface Mobility Management Function) to connect to the non-access stratum (NAS, None Access Stratum) and exchange NAS messages.
  • the AMF is responsible for the access and mobility management network elements in the core network
  • the session management function (SMF, Session Management Function) is responsible for the session management network elements in the core network.
  • the AMF is also responsible for the Forwarding of session management related messages between UE and SMF.
  • the Policy Control Function is a policy management function in the core network, and is responsible for formulating policies related to mobility management, session management, and charging of the UE.
  • the User Plane Function (UPF, User Plane Function) is the user plane function in the core network. It transmits data to the external data network through the N6 interface, and transmits data to the AN (or RAN) through the N3 interface.
  • the UE After the UE accesses the 5G network through the Uu port, it transmits service data through the network.
  • the network layer of the UE obtains the QoS requirements of the service from the upper layer (such as the operating system or application), and the UE converts the QoS requirements of the service into the QoS parameters of the Uu interface, and passes the corresponding correspondence between the UE and the UPF under the control of the SMF QoS flow for data transmission.
  • the network layer of the UE obtains the QoS requirements of the service from the upper layer (such as the operating system or application)
  • the UE converts the QoS requirements of the service into the QoS parameters of the Uu interface, and passes the corresponding correspondence between the UE and the UPF under the control of the SMF QoS flow for data transmission.
  • the communication between UE and UE needs to establish PC5 connection. Before the PC5 connection is established, the two UEs need to discover each other, and the connection can be established only when the other party is around.
  • Step S53 of directly establishing the PC5 connection as shown in Figure 5.
  • UE-1 is used for announcing, and UE-2, UE-3, UE-4, and UE-5 are used for monitoring.
  • the discovery process of the mode A may include: UE-1 broadcasts or unicast an announcement message (Announcement message), and the announcement message may carry services that UE-1 itself supports or needs to communicate with PC5 (S31). Other UEs such as UE-2, UE-3, UE-4, UE-5, etc. monitor. If a certain UE monitors the service it needs, it initiates a service connection to UE-1. If UE-1 uses the L2 ID (layer 2 identity) for the discovery message, it broadcasts the Announcement message; if it uses the L2 ID for the target UE, it unicasts the Announcement message.
  • L2 ID layer 2 identity
  • UE-1 may be a discoverer, and UE-2, UE-3, UE-4, and UE-5 may be discoverers.
  • the discovery process of mode B may include: UE-1 broadcasts or unicast a solicitation message (Solicitation message), and the message may carry its own service requirements (S41). If the UE that receives the message finds that it can support the service requirement, it can feed back a Response message to UE-1.
  • UE-2 and UE-3 send response messages (S42a and S42b) to UE-1 to feed back their own supported services.
  • UE-1 may select a desired UE to initiate a service connection.
  • UE-1 broadcasts the solicitation message if using the L2 ID for the discovery message; unicasts the solicitation message if using the L2 ID for the target UE.
  • the process of directly establishing a PC5 connection may include:
  • UE-2 determines the destination Layer-2 ID for signaling reception (UE-2 determines the destination Layer-2 ID for signaling reception.).
  • UE-3 determines the target layer 2 identity for signaling reception.
  • UE-4 determines the target layer 2 identity for signaling reception.
  • S51a, S51b and S51c have no timing restrictions and can be executed independently.
  • the ProSe application layer of UE-1 provides application information for PC5 unicast communication (ProSe application layer provides application information for PC5 unicast communication.).
  • UE-1 sends a direct communication request (broadcast or unicast) (Direct Communication Request (Broadcast or Unicast)).
  • the UE1 can directly broadcast or unicast the direct communication request, and the request can carry the service information it needs, such as the service capability or service requirements it needs. If it is unicast, the request may carry the identifier of the target UE. The target UE may respond to the request.
  • S56a ProSe service data (ProSe data over unicast link) on the unicast link between UE-1 and UE-2.
  • S56b ProSe service data on the unicast link between UE-1 and UE-2.
  • FIG. 6 is a schematic flowchart of a discovery method 200 according to an embodiment of the present application.
  • the method can optionally be applied to the systems shown in FIG. 1 and FIG. 2 , but is not limited thereto.
  • the method includes at least some of the following.
  • the short-range service layer of the terminal performs discovery based on the discovery type of the short-range service.
  • the discovery type of the short-range service includes at least one of the following:
  • Mode A For the specific flow of Mode A, reference may be made to FIG. 3 and related descriptions.
  • mode B refer to FIG. 4 and its related description.
  • FIG. 5 For the specific process of establishing a connection directly, refer to FIG. 5 and its related description.
  • the Proximity Service (ProSe) layer receives indication information from the application layer of the terminal, where the indication information includes a discovery type.
  • the terminal may include a short-range service layer and an application layer.
  • the application layer can be above the short-range business layer.
  • the application layer can interact with the application server and send the information from the application server to the short-range business layer.
  • the proximity service layer can support various proximity services (ProSe).
  • the application layer of the terminal may receive the indication information from the application server.
  • the indication information may include which discovery type the terminal needs to use for discovery. Different discovery types can be distinguished by using different indication information.
  • the indication information may also include a proximity service identifier (ProSe ID).
  • ProSe ID a proximity service identifier
  • the proximity service layer receives indication information including discovery type and ProSe ID from the application layer. Use this ProSe ID to establish a connection, perform data transfer, etc.
  • the indication information further includes that the terminal is the initiator or the terminal is the destination.
  • the terminal may determine its own role information through negotiation with the application server. For example, two terminals negotiate through the application server, and determine that one terminal is the initiator and the other terminal is the destination.
  • the application server may send indication information to the two terminals respectively.
  • the indication information sent by the application server to the initiator includes the discovery type and the information that the terminal is the initiator.
  • the indication information sent by the application server to the destination terminal includes the discovery type and the information that the terminal is the destination terminal.
  • the close-proximity service layer receives configuration information from the core network element, and the configuration information includes a mapping relationship between the close-proximity service identifier and the discovery type.
  • the mapping relationship may include a list of multiple proximity service identifiers and their corresponding discovery types.
  • the terminal may acquire the discovery type from configuration information from the core network.
  • the configuration information may be a terminal policy (UE policy).
  • the terminal receives configuration information including the discovery type of the terminal from one or more network elements of the core network.
  • the configuration information may include the mapping relationship between the ProSe identifier of the terminal and the discovery type.
  • the application triggers the proximity service layer to discover the proximity service
  • the terminal may determine the discovery type of the corresponding proximity service or application based on the ProSe identifier.
  • the proximity business or application utilizes the discovery type for the discovery process. For example: App1-ModelA/B, indicating that the application program APP1 corresponds to mode A or mode B.
  • the configuration information further includes that the terminal is an initiator or that the terminal is a destination.
  • the mapping relationship in the configuration information further includes that the terminal is the initiator or the terminal is the destination.
  • the terminal may also acquire role information of the terminal from the core network.
  • the configuration information received by the terminal from one or more network elements of the core network includes the discovery type of the terminal and whether the terminal is an initiator or a destination.
  • the mapping relationship in the configuration information may include information such as the discovery type of the terminal, whether the terminal is an initiator or a destination, and a short-range service identifier.
  • the application triggers the proximity service layer to discover the proximity service
  • the terminal may determine the discovery type of the corresponding proximity service or application based on the ProSe identifier.
  • the short-range service or application uses the mapping relationship to determine whether the terminal is the initiator or the destination, and performs the discovery process based on the discovery type.
  • the proximity service layer receives configuration information from the core network element, where the configuration information includes a mapping relationship between the proximity service identifier and the Layer 2 ID (Layer 2 ID) of the discovery message.
  • the configuration information includes a mapping relationship between the proximity service identifier and the Layer 2 ID (Layer 2 ID) of the discovery message.
  • the configuration information received by the ProSe layer of the terminal from the core network may also include the mapping relationship between the ProSe identifier and the Layer 2 ID of the discovery message. If the terminal is the initiator, the discovery message can be sent based on the Layer 2 ID; if the terminal is the destination, the discovery message can be monitored based on the Layer 2 ID.
  • the configuration information received by the ProSe layer of the terminal from the core network may include the discovery type of the terminal, whether the terminal is the initiator or the destination, the ProSe identifier and the Layer2 ID of the discovery message. mapping relationship between them.
  • the terminal may acquire the discovery type of the terminal and whether the terminal is the initiator or the destination from the application server. And, the terminal can obtain the mapping relationship between the ProSe identifier and the Layer 2 ID of the discovery message from the core network.
  • the close-proximity service layer receives configuration information from the core network element, and the configuration information includes the mapping relationship between the close-proximity service identifier and the Layer 2 ID of the discovery message of the discovery type.
  • the configuration information received by the ProSe layer of the terminal from the core network may also include the mapping relationship between the ProSe identifier and the Layer 2 ID of the discovery message of the discovery type.
  • Discovery messages of different discovery types can have different Layer 2 IDs.
  • the configuration information received by the ProSe layer of the terminal from the core network may include the discovery type of the terminal, whether the terminal is the initiator or the destination, the ProSe identifier and the discovery message of the discovery type.
  • the terminal may acquire the discovery type of the terminal and whether the terminal is the initiator or the destination from the application server. And, the terminal can obtain the mapping relationship between the ProSe identifier and the Layer 2 ID of the discovery message of the discovery type from the core network.
  • the terminal before the close-proximity service layer receives the configuration information from the core network element, the terminal indicates the type of the configuration information requested to the core network element. In this way, the core network element can return the configuration information required by the terminal according to the type of configuration information requested by the terminal. There is no need to return all types of configuration information.
  • the type of the configuration information includes at least one of the following:
  • the UE sends the requested policy type to the PCF, such as: configuration information for discovery, configuration information for communication, configuration information for relay, and the like.
  • the mapping relationship further includes an associated area. In this way, when the terminal is in the associated area, the terminal can use the mapping relationship.
  • the configuration information received by the ProSe layer of the terminal from the core network may include the discovery type of the terminal, whether the terminal is an initiator or a destination, and a mapping relationship between associated areas.
  • the configuration information received by the ProSe layer of the terminal from the core network may include the discovery type of the terminal, whether the terminal is an initiator or a destination, an associated area, and a mapping relationship between ProSe identifiers.
  • the configuration information received by the ProSe layer of the terminal from the core network may include the discovery type of the terminal, whether the terminal is an initiator or a destination, an associated area, a mapping relationship between the ProSe identifier and the Layer 2 ID of the discovery message. .
  • the configuration information received by the ProSe layer of the terminal from the core network may include the discovery type of the terminal, whether the terminal is the initiator or the destination, the associated area, the ProSe identifier and the Layer 2 ID of the discovery message of the discovery type. mapping relationship.
  • the area includes at least one of the following:
  • PLMN Land Public Mobile Network
  • Cell ID Cell ID set
  • TAI Tracking Area Identity
  • Global Positioning System Global Positioning System, GPS
  • the core network element includes at least one of the following:
  • PCF Policy Control Function
  • Access and Mobility Management Function AMF
  • UDM Unified Data Management
  • the short-range service layer of the S210 terminal performs discovery based on the discovery type of the short-range service, which may specifically include: when the terminal is the initiator, generating the signaling corresponding to the discovery type by the terminal.
  • the terminal may determine its own discovery type and role information based on the indication information or configuration information. Assume two terminals, one is the initiator and the other is the destination. The initiator can generate signaling corresponding to the discovery type based on its own discovery type, and then send the signaling to the destination. The destination can monitor signaling on the logical channel corresponding to the discovery type based on its own discovery type.
  • the signaling is a discovery message or a connection establishment request message.
  • the signaling generated by the initiator may be a discovery message corresponding to Mode A or Mode B. Then the initiator can send the discovery message to the target.
  • the signaling generated by the initiator may be a connection establishment request message. Then the initiator may send the connection establishment request message to the destination.
  • signaling corresponding to different discovery types has different formats.
  • the signaling corresponding to mode A and mode B may have different formats.
  • the signaling corresponding to the mode A and the mode B and the direct connection establishment may have different formats.
  • the formats of the signaling corresponding to the mode A and the mode B are the same, but the signaling corresponding to the mode A and the mode B and the signaling corresponding to the direct connection establishment have different formats.
  • the discovery type is included in the signaling.
  • signaling in the same format may represent different discovery types through different parameter values.
  • the signaling A1 corresponding to the mode A and the signaling B1 corresponding to the mode B have the same format, but different parameter values are used in the signaling A1 and the signaling B1 to indicate different discovery types.
  • different parameter values are respectively used to represent different discovery types.
  • signaling corresponding to different discovery types is transmitted through different logical channels and uses different layer 2 IDs.
  • logical channels of different discovery types may use different layer 2 IDs.
  • the short-range service layer of the S210 terminal performs discovery based on the discovery type of the short-range service, which may specifically include: when the terminal is the destination, the terminal monitors signaling on the logical channel corresponding to the discovery type.
  • the short-range service layer of the terminal performs discovery based on the discovery type of the short-range service, so that the terminal can distinguish different discovery types of the short-range service, which is beneficial for the terminal to perform the discovery process according to the discovery type.
  • the terminal may generate and send signaling according to the acquired discovery type, and the destination terminal may monitor the signaling according to the acquired discovery type. In this way, it is advantageous to perform discovery and connection quickly and accurately.
  • the UE may acquire the mapping relationship between ProSe and the discovery type; then, the initiating UE may select the corresponding discovery type from the mapping relationship, and generate a discovery message.
  • the destination UE can monitor signaling on the logical channel corresponding to the discovery type.
  • Example 1 see Figure 7, this example may include the following steps:
  • the application layer in UE1 can decide which discovery type (or called discovery method) needs to be used, and send indication (indication) information (may be referred to as indication) to the proximity service layer (ProSe layer).
  • the indication information may indicate a discovery type such as mode (Model) A, mode B, and direct connection establishment.
  • mode (Model) A, mode B, and direct connection establishment correspond to different indication information respectively. It can also be used to distinguish that the mode A/B corresponds to one indication information, and the directly established connection corresponds to one indication information.
  • the application layer also indicates UE1 as the originating UE or the destination UE.
  • the application layer in UE2 may also send the same indication information to the ProSe layer of UE2.
  • the application layer may also indicate UE2 as the destination UE or the initiator UE.
  • S71a and S71b have no timing restrictions, and can be independently executed by the two terminals.
  • the two UEs may negotiate through the application server to determine their discovery type, role information, and the like.
  • the ProSe layer of U1 After receiving the indication information, the ProSe layer of U1 forms signaling corresponding to the indication information (or discovery type). For example, a discovery message (Discovery message) or a connection request establishment message (Direct link establishment request).
  • the corresponding signaling may have different formats and include different parameters.
  • mode A and mode B can also be distinguished by using the type in the same signaling.
  • mode A, mode B and direct connection establishment may use different logical channels for transmission.
  • the ProSe layer of UE2 after the ProSe layer of UE2 receives the indication information, if it is determined that it is the destination UE, it can decide to monitor signaling on the logical channel corresponding to the discovery type.
  • S72a and S72b have no timing restrictions, and can be independently executed by the two terminals.
  • Example 2 see Figure 8, this example may include the following steps:
  • the configuration information may be a UE policy. It can contain the mapping relationship (or called correspondence) between ProSe ID and discovery type.
  • the mapping relationship can also be associated with a certain area, so that the UE can use the mapping relationship under this area.
  • the representation of the area may be: PLMN, cell ID set, TAI set, GPS set and so on.
  • a discovery type only represents a certain type, other ProSes not in the mapping relationship can use a discovery type other than this discovery type.
  • the UE may also be additionally indicated as the initiator or the target.
  • UE1 ProSe layer After UE1 ProSe layer receives the mapping relationship, if it is determined that it is the initiator UE, it generates signaling corresponding to the ProSe ID.
  • the corresponding signaling may have different formats and include different parameters.
  • mode A and mode B can also be distinguished by using the type in the same signaling.
  • mode A, mode B and direct connection establishment may use different logical channels for transmission.
  • the ProSe layer of UE2 after the ProSe layer of UE2 receives the mapping information, if it determines that it is the destination UE, it can decide to monitor signaling on the logical channel corresponding to the discovery type.
  • S82a and S82b have no timing restrictions, and can be independently executed by the two terminals.
  • FIG. 9 is a schematic block diagram of a terminal 400 according to an embodiment of the present application.
  • the terminal 400 may include:
  • the discovery unit 410 is configured to perform discovery based on the discovery type of the close-proximity service through the close-proximity service layer.
  • the terminal further includes:
  • the first receiving unit 420 is configured to receive indication information from the application layer of the terminal through the short-range service layer, where the indication information includes the discovery type.
  • the indication information further includes that the terminal is the initiator or the terminal is the destination.
  • the terminal further includes:
  • the second receiving unit 430 is configured to receive configuration information from the core network element through the proximity service layer, where the configuration information includes a mapping relationship between the proximity service identifier and the discovery type.
  • the configuration information further includes that the terminal is an initiator or that the terminal is a destination.
  • the mapping relationship in the configuration information further includes that the terminal is the initiator or the terminal is the destination.
  • the terminal further includes:
  • the third receiving unit 440 is configured to receive configuration information from the core network element through the proximity service layer, where the configuration information includes the mapping relationship between the proximity service identifier and the Layer 2 identifier Layer 2 ID of the discovery message.
  • the terminal further includes:
  • the fourth receiving unit 450 is configured to receive configuration information from the core network element through the proximity service layer, where the configuration information includes the mapping relationship between the proximity service identifier and the Layer 2 ID of the discovery message of the discovery type.
  • the terminal further includes:
  • the instructing unit 460 is configured to instruct the core network element to request the type of the configuration information before receiving the configuration information from the core network element through the short-range service layer.
  • the type of the configuration information includes at least one of the following:
  • mapping relationship further includes an associated area.
  • the area includes at least one of the following:
  • the core network element includes at least one of the following:
  • the discovery unit is further configured to generate signaling corresponding to the discovery type when the terminal is the initiator.
  • the signaling is a discovery message or a connection establishment request message.
  • signaling corresponding to different discovery types has different formats.
  • the discovery type is included in the signaling.
  • signaling corresponding to different discovery types is transmitted through different logical channels and uses different layer 2 IDs.
  • the discovery unit is further configured to monitor signaling on the logical channel corresponding to the discovery type when the terminal is the destination.
  • the discovery type includes at least one of the following:
  • the terminal 400 in this embodiment of the present application can implement the corresponding functions of the terminal in the foregoing method embodiments.
  • each module (sub-module, unit, or component, etc.) in the terminal 400 reference may be made to the corresponding descriptions in the foregoing method embodiments, which will not be repeated here.
  • the functions described by each module (submodule, unit or component, etc.) in the terminal 400 of the application embodiment may be implemented by different modules (submodule, unit or component, etc.), or may be implemented by the same module (submodule, unit or component, etc.) implementation.
  • FIG. 11 is a schematic flowchart of a discovery method 300 according to an embodiment of the present application.
  • the method can optionally be applied to the systems shown in FIG. 1 and FIG. 2 , but is not limited thereto.
  • the method includes at least some of the following.
  • the network device sends the discovery type of the short-range service to the terminal.
  • the short-range service layer of the terminal can be made to perform discovery based on the discovery type of the short-range service.
  • the discovery type of the short-range service includes at least one of the following:
  • the network device may be an application server.
  • the network device may send indication information to the application layer of the terminal, where the indication information includes the discovery type of the short-range service.
  • the terminal may include a short-range service layer and an application layer.
  • the application layer can be above the short-range business layer.
  • the application layer can interact with the application server and send the information from the application server to the short-range business layer.
  • the proximity service layer can support various proximity services (ProSe).
  • the application layer of the terminal may receive the indication information from the application server.
  • the indication information may include which discovery type the terminal needs to use for discovery. Different discovery types can be distinguished by using different indication information.
  • the indication information may also include a proximity service identifier (ProSe ID).
  • ProSe ID a proximity service identifier
  • the proximity service layer receives indication information including discovery type and ProSe ID from the application layer. Use this ProSe ID to establish a connection, perform data transfer, etc.
  • the indication information further includes that the terminal is the initiator or the terminal is the destination.
  • the network device may be a core network element.
  • the network device may send configuration information to the terminal, where the configuration information includes the mapping relationship between the proximity service identifier and the discovery type.
  • the mapping relationship may include a list of multiple proximity service identifiers and their corresponding discovery types.
  • the terminal may acquire the discovery type from configuration information from the core network.
  • the configuration information may be a terminal policy (UE policy).
  • UE policy terminal policy
  • a terminal receives configuration information including a discovery type for the terminal from one or more network elements of the core network.
  • the configuration information may include the mapping relationship between the ProSe identifier of the terminal and the discovery type.
  • the application triggers the proximity service layer to discover the proximity service
  • the terminal may determine the discovery type of the corresponding proximity service or application based on the ProSe identifier.
  • the proximity business or application utilizes the discovery type for the discovery process. For example: App1-ModelA/B, indicating that the application program APP1 corresponds to mode A or mode B.
  • the configuration information further includes that the terminal is an initiator or that the terminal is a destination.
  • the mapping relationship further includes that the terminal is the initiator or the terminal is the destination.
  • the core network may also send the role information of the terminal to the terminal.
  • the configuration information received by the terminal from one or more network elements of the core network includes the discovery type of the terminal and whether the terminal is an initiator or a destination.
  • the mapping relationship in the configuration information may include information such as the discovery type of the terminal, whether the terminal is an initiator or a destination, and a short-range service identifier.
  • the application triggers the proximity service layer to discover the proximity service
  • the terminal may determine the discovery type of the corresponding proximity service or application based on the ProSe identifier.
  • the short-range service or application uses the mapping relationship to determine whether the terminal is the initiator or the destination, and performs the discovery process based on the discovery type.
  • the core network element sends configuration information to the short-range service layer of the terminal, where the configuration information includes the mapping relationship between the short-range service identifier and the Layer 2 identifier (Layer 2 ID) of the discovery message.
  • the configuration information includes the mapping relationship between the short-range service identifier and the Layer 2 identifier (Layer 2 ID) of the discovery message.
  • the network element of the core network sends configuration information to the proximity service layer of the terminal, where the configuration information includes the mapping relationship between the proximity service identifier and the Layer 2 ID of the discovery message of the discovery type.
  • the core network element before the core network element sends the configuration information to the short-range service layer of the terminal, the core network element receives an indication of the type of the configuration information requested by the terminal. In this way, the core network element can return the configuration information required by the terminal according to the type of configuration information requested by the terminal. There is no need to return all types of configuration information.
  • the type of the configuration information includes at least one of the following:
  • the UE sends the requested policy type to the PCF, such as: configuration information for discovery, configuration information for communication, configuration information for relay, and the like.
  • the mapping relationship further includes an associated area. In this way, when the terminal is in the associated area, the terminal can use the mapping relationship.
  • the area includes at least one of the following:
  • PLMN Land Public Mobile Network
  • Cell ID Cell ID set
  • TAI Tracking Area Identity
  • Global Positioning System Global Positioning System, GPS
  • the core network element includes at least one of the following:
  • PCF Policy Control Function
  • Access and Mobility Management Function AMF
  • UDM Unified Data Management
  • FIG. 12 is a schematic block diagram of a network device 500 according to an embodiment of the present application.
  • the network device 500 may include:
  • the sending unit 510 is configured to send the discovery type of the short-range service to the terminal.
  • the short-range service layer of the terminal can perform discovery based on the discovery type of the short-range service.
  • the discovery type of the short-range service includes at least one of the following:
  • the network device may be an application server.
  • the sending unit 510 of the network device may send indication information to the application layer of the terminal, where the indication information includes the discovery type of the short-range service.
  • the indication information may also include a proximity service identifier (ProSe ID).
  • ProSe ID a proximity service identifier
  • the proximity service layer receives indication information including discovery type and ProSe ID from the application layer. Use this ProSe ID to establish a connection, perform data transfer, etc.
  • the indication information further includes that the terminal is the initiator or the terminal is the destination.
  • the network device may be a core network element.
  • the sending unit 510 of the network device may send configuration information to the terminal, where the configuration information includes the mapping relationship between the proximity service identifier and the discovery type.
  • the mapping relationship may include a list of multiple proximity service identifiers and their corresponding discovery types.
  • the configuration information further includes that the terminal is an initiator or that the terminal is a destination.
  • the mapping relationship further includes that the terminal is the initiator or the terminal is the destination.
  • the sending unit 510 of the core network element sends configuration information to the proximity service layer of the terminal, where the configuration information includes the mapping relationship between the proximity service identifier and the Layer 2 ID (Layer 2 ID) of the discovery message.
  • the configuration information includes the mapping relationship between the proximity service identifier and the Layer 2 ID (Layer 2 ID) of the discovery message.
  • the sending unit 510 of the core network element sends configuration information to the proximity service layer of the terminal, where the configuration information includes the mapping relationship between the proximity service identifier and the Layer 2 ID of the discovery message of the discovery type.
  • the core network element receives an indication of the type of the configuration information requested by the terminal. In this way, the core network element can return the configuration information required by the terminal according to the type of configuration information requested by the terminal. There is no need to return all types of configuration information.
  • the type of the configuration information includes at least one of the following:
  • the UE sends the requested policy type to the PCF, such as: configuration information for discovery, configuration information for communication, configuration information for relay, and the like.
  • the mapping relationship further includes an associated area. In this way, when the terminal is in the associated area, the terminal can use the mapping relationship.
  • the area includes at least one of the following:
  • PLMN Land Public Mobile Network
  • Cell ID Cell ID set
  • TAI Tracking Area Identity
  • Global Positioning System Global Positioning System, GPS
  • the core network element includes at least one of the following:
  • PCF Policy Control Function
  • Access and Mobility Management Function AMF
  • UDM Unified Data Management
  • the network device 500 in this embodiment of the present application can implement the corresponding functions of the network device in the foregoing method embodiments.
  • each module (submodule, unit, or component, etc.) in the network device 500 reference may be made to the corresponding descriptions in the foregoing method embodiments, which will not be repeated here.
  • the functions described by each module (submodule, unit, or component, etc.) in the network device 500 of the application embodiment may be implemented by different modules (submodule, unit, or component, etc.), or may be implemented by the same module Module (submodule, unit or component, etc.) implementation.
  • FIG. 13 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application.
  • the communication device 600 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so that the communication device 600 implements the methods in the embodiments of the present application.
  • the communication device 600 may also include a memory 620 .
  • the processor 610 may call and run a computer program from the memory 620, so that the communication device 600 implements the methods in the embodiments of the present application.
  • the memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices .
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of the antennas may be one or more.
  • the communication device 600 may be a terminal of this embodiment of the present application, and the communication device 600 may implement corresponding processes implemented by the terminal in each method of this embodiment of the present application, which is not repeated here for brevity.
  • the communication device 600 may be the network device of this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.
  • FIG. 14 is a schematic structural diagram of a chip 700 according to an embodiment of the present application.
  • the chip 700 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the methods in the embodiments of the present application.
  • the chip 700 may further include a memory 720 .
  • the processor 710 may call and run a computer program from the memory 720 to implement the method executed by the terminal in the embodiment of the present application.
  • the memory 720 may be a separate device independent of the processor 710 , or may be integrated in the processor 710 .
  • the chip 700 may further include an input interface 730 .
  • the processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.
  • the chip 700 may further include an output interface 740 .
  • the processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal in each method of the embodiment of the present application, which is not repeated here for brevity.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.
  • Chips applied to network equipment and terminal equipment can be the same chip or different chips.
  • the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.
  • the processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or Other programmable logic devices, transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • the general-purpose processor mentioned above may be a microprocessor or any conventional processor or the like.
  • the memory mentioned above may be either volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM).
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
  • FIG. 15 is a schematic block diagram of a communication system 800 according to an embodiment of the present application.
  • the communication system 800 includes at least two terminals, eg, terminal 810 and terminal 820 .
  • the terminal 810 and the terminal 820 are configured to perform discovery based on the discovery type of the short-range service through the short-range service layer.
  • terminal 810 and the terminal 820 may be used to implement the corresponding functions implemented by the terminal in the above method. For brevity, details are not repeated here.
  • the terminal 810 if the terminal 810 is the initiator, the terminal 810 generates signaling corresponding to the discovery type. In addition, the terminal 810 may also send the signaling in a mode such as mode A, mode B, or directly establishing a connection. If the terminal 820 is the destination terminal, the terminal 820 monitors the signaling on the logical channel corresponding to the discovery type.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored on or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted over a wire from a website site, computer, server or data center (eg coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to another website site, computer, server or data center.
  • 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, data center, etc. that includes one or more available media integrated.
  • the available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a Solid State Disk (SSD)), and the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium eg, a Solid State Disk (SSD)
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

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Abstract

本申请涉及一种发现方法和终端。其中，该发现方法包括：终端的近距离业务层基于近距离业务的发现类型进行发现。在该申请实施例中，终端的近距离业务层基于近距离业务的发现类型进行发现，可以使终端区分近距离业务的不同发现类型，有利于终端按照发现类型进行发现流程。

Description

发现方法和终端 技术领域
本申请涉及通信领域，更具体地，涉及一种发现方法和终端。
背景技术
随着第五代通信(5th-Generation，5G)应用的不断发展，出现了新的业务形态，例如网络控制互动服务(Network Controlled Interactive Services，NCIS)业务。NCIS业务主要针对增强现实(Augmented Reality，AR)、虚拟现实(Virtual Reality，VR)、游戏等应用，对速率、时延、丢包率、高速编解码等业务质量有很高的要求。例如：对于VR游戏，需要达到10Gbps速率，丢包率不可超过10E-4(即10 -4)。针对NCIS业务建立的会话为NCIS会话，在相同NCIS会话的UE可以认为组成一个NCIS组，例如：游戏中的组队。
在3GPP中，使用5G近距离业务(Proximity Service，ProSe)课题可以对近距离业务通信的方案进行设计。ProSe可以包含NCIS。对于ProSe，如何发现终端是需要考虑的问题。
发明内容
本申请实施例提供一种发现方法和终端，可以按照发现类型进行发现流程。
本申请实施例提供一种发现方法，包括：终端的近距离业务层基于近距离业务的发现类型进行发现。
本申请实施例提供一种终端，包括：发现单元，用于通过近距离业务层基于近距离业务的发现类型进行发现。
本申请实施例提供一种终端，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行存储器中存储的计算机程序，以使该终端执行上述的发现方法。
本申请实施例提供一种芯片，用于实现上述的发现方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行上述的发现方法。
本申请实施例提供一种计算机可读存储介质，用于存储计算机程序，当该计算机程序被设备运行时使得该设备执行上述的发现方法。
本申请实施例提供一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述的发现方法。
本申请实施例提供一种计算机程序，当其在计算机上运行时，使得计算机执行上述的发现方法。
本申请实施例，终端的近距离业务层基于近距离业务的发现类型进行发现，可以使终端区分近距离业务的不同发现类型，有利于终端按照发现类型进行发现流程。
附图说明
图1是根据本申请实施例的应用场景的示意图。
图2是5G网络***架构的示例图。
图3是模式A的示意性流程图。
图4是模式B的示意性流程图。
图5是直接建立PC5连接的示意性流程图。
图6是根据本申请一实施例的发现方法的示意性流程图。
图7是根据本申请一实施例的发现方法的示例1的示意性流程图。
图8是根据本申请一实施例的发现方法的示例2的示意性流程图。
图9是根据本申请一实施例的终端的示意性框图。
图10是根据本申请另一实施例的终端的示意性框图。
图11是根据本申请一实施例的发现方法的示意性流程图。
图12是根据本申请一实施例的网络设备的示意性框图。
图13是根据本申请实施例的通信设备示意性框图。
图14是根据本申请实施例的芯片的示意性框图。
图15是根据本申请实施例的通信***的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信***，例如：全球移动通讯(Global System of Mobile communication，GSM)***、码分多址(Code Division Multiple Access，CDMA)***、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)***、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)***、先进的长期演进(Advanced long term evolution，LTE-A)***、新无线(New Radio，NR)***、NR***的演进***、非授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)***、非授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)***、非地面通信网络(Non-Terrestrial Networks，NTN)***、通用移动通信***(Universal Mobile Telecommunication System，UMTS)、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、第五代通信(5G)***或其他通信***等。
通常来说，传统的通信***支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信***将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，车辆间(Vehicle to Vehicle，V2V)通信，或车联网(Vehicle to everything，V2X)通信等，本申请实施例也可以应用于这些通信***。
可选地，本申请实施例中的通信***可以应用于载波聚合(Carrier Aggregation，CA)场景，也可以应用于双连接(Dual Connectivity，DC)场景，还可以应用于独立(Standalone，SA)布网场景。
可选地，本申请实施例中的通信***可以应用于非授权频谱，其中，非授权频谱也可以认为是共享频谱；或者，本申请实施例中的通信***也可以应用于授权频谱，其中，授 权频谱也可以认为是非共享频谱。
本申请实施例结合网络设备和终端设备描述了各个实施例，其中，终端设备也可以称为用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
终端设备可以是WLAN中的站点(STAION，ST)，可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、下一代通信***例如NR网络中的终端设备，或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)网络中的终端设备等。
在本申请实施例中，终端设备可以部署在陆地上，包括室内或室外、手持、穿戴或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。
在本申请实施例中，终端设备可以是手机(Mobile Phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或智慧家庭(smart home)中的无线终端设备等。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
在本申请实施例中，网络设备可以是用于与移动设备通信的设备，网络设备可以是WLAN中的接入点(Access Point，AP)，GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及NR网络中的网络设备(gNB)或者未来演进的PLMN网络中的网络设备或者NTN网络中的网络设备等。
作为示例而非限定，在本申请实施例中，网络设备可以具有移动特性，例如网络设备可以为移动的设备。可选地，网络设备可以为卫星、气球站。例如，卫星可以为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(High Elliptical Orbit，HEO)卫星等。可选地，网络设备还可以为设置在陆地、水域等位置的基站。
在本申请实施例中，网络设备可以为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(Small cell)对应的基站，这里的小小区可以包括：城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
图1示例性地示出了一种通信***100。该通信***包括一个网络设备110和两个终端设备120。可选地，该通信***100可以包括多个网络设备110，并且每个网络设备110的覆盖范围内可以包括其它数量的终端设备120，本申请实施例对此不做限定。
可选地，该通信***100还可以包括移动性管理实体(Mobility Management Entity，MME)、接入与移动性管理功能(Access and Mobility Management Function，AMF)等其他网络实体，本申请实施例对此不作限定。
其中，网络设备又可以包括接入网设备和核心网设备。即无线通信***还包括用于与接入网设备进行通信的多个核心网。接入网设备可以是长期演进(long-term evolution，LTE)***、下一代(移动通信***)(next radio，NR)***或者授权辅助接入长期演进(authorized auxiliary access long-term evolution，LAA-LTE)***中的演进型基站(evolutional node B，简称可以为eNB或e-NodeB)宏基站、微基站(也称为“小基站”)、微微基站、接入站点(access point，AP)、传输站点(transmission point，TP)或新一代基站(new generation Node B，gNodeB)等。
应理解，本申请实施例中网络/***中具有通信功能的设备可称为通信设备。以图1示出的通信***为例，通信设备可包括具有通信功能的网络设备和终端设备，网络设备和终端设备可以为本申请实施例中的具体设备，此处不再赘述；通信设备还可包括通信***中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“***”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
为便于理解本申请实施例的技术方案，以下对本申请实施例的相关技术进行说明，以下相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合，其均属于本申请实施例的保护范围。
图2示例性地示出了5G网络***架构。其中，UE通过Uu无线接口与接入网(AN，Access Network)进行接入层连接，交互接入层消息及无线数据传输，UE通过N1接口与接入和移动性管理功能(AMF，Access and Mobility Management Function)进行非接入层(NAS，None Access Stratum)连接，交互NAS消息。AMF负责核心网中的接入和移动性管理网元，会话管理功能(SMF，Session Management Function)负责核心网中的会话管理网元，AMF在对UE进行移动性管理之外，还负责将从会话管理相关消息在UE和SMF之间的转发。策略控制功能(Policy Control Function，PCF)是核心网中的策略管理功能，负责制定对UE的移动性管理、会话管理、计费等相关的策略。用户面功能(UPF，User Plane Function)是核心网中的用户面功能，通过N6接口与外部数据网络进行数据传输，通过N3接口与AN(或RAN)进行数据传输。
UE通过Uu口接入5G网络后，通过网络进行业务数据的传输。在业务发起时，UE的网络层从上层(例如操作***或者应用)获得业务的QoS需求，UE将业务的QoS需求转换为Uu接口的QoS参数，在SMF的控制下通过UE与UPF之间相应的QoS流进行数据传输。
UE和UE之间的通信需要建立PC5连接。在PC5连接建立之前两个UE需要互相发现，知道对方在自己周围才可以建立连接。
以下为几种连接建立模式中的发现流程：
1.先进行Model A/B发现流程，如图3和图4所示，然后再建立PC5连接。
2.直接建立PC5连接的第S53步，如图5所示。
如果UE支持上述多种连接建立模式，难以区分模式A、模式B和连接建立过程的第S53步。
参见图3，在模式A中，UE-1用于通知(announcing)，UE-2、UE-3、UE-4、UE-5用于监听(monitoring)。模式A的发现过程可以包括：UE-1广播或单播通知消息(Announcement message)，通知消息中可以携带UE-1自己支持或者要进行PC5通信的业务(S31)。其他UE例如UE-2、UE-3、UE-4、UE-5等监听。如果某个UE监听到自己需要的业务，向UE-1发起业务连接。UE-1如果使用针对发现消息的L2 ID(层二标识)，则广播Announcement message；如果使用针对目标UE的L2 ID，则单播Announcement message。
参见图4，在模式B中，UE-1可以是发现者(discoverer)，UE-2、UE-3、UE-4、UE-5可以是被发现者(discoveree)。模式B的发现过程可以包括：UE-1广播或单播征集消息(Solicitation message)，该消息中可以携带自己的业务需求(S41)。收到该消息的UE，如果发现自己可以支持该业务需求，可以向UE-1反馈响应消息(Response message)。例如，UE-2、UE-3向UE-1发送响应消息(S42a和S42b)，以反馈自己的支持的业务。UE-1可以选择所需的UE发起业务连接。UE-1如果使用针对发现消息的L2 ID，则广播solicitation message；如果使用针对目标UE的L2 ID，则单播solicitation message。
参见图5，直接建立PC5连接的过程可以包括：
S51a.UE-2确定用于信令接收的目标层二标识(UE-2determines the destination Layer-2  ID for signalling reception.)。
S51b.UE-3确定用于信令接收的目标层二标识。
S51c.UE-4确定用于信令接收的目标层二标识。
其中，S51a、S51b和S51c没有时序限制，可以分别独立执行。
S52.UE-1的ProSe应用层为PC5单播通信提供应用信息(ProSe application layer provides application information for PC5 unicast communication.)。
S53.UE-1发送直接通信请求(广播或单播)(Direct Communication Request(Broadcast or Unicast))。UE1可以直接广播或单播直接通信请求，在请求中可以带有自己需要的业务信息，例如自己需要的业务能力或业务需求。如果是单播，该请求中可以带有目标UE的标识。目标UE可以响应该请求。
A)面向UE的二层链路建立(UE oriented Layer-2 link establishment)的过程如下：
S54a.UE-1与UE-2之间建立安全上下文(Security Establishment)
S55a.UE-1与UE-2之间直接通信接受(单播)(Direct Communication Accept(Unicast))
S56a.UE-1与UE-2之间单播链路上的ProSe服务数据(ProSe data over unicast link)。
B)ProSe面向服务的二层链路建立(ProSe oriented Layer-2 link establishment)
S54b.UE-1与UE-2之间建立安全上下文(Security Establishment)
S55b.UE-1与UE-2之间直接通信接受(单播)(Direct Communication Accept(Unicast))
S54c.UE-1与UE-4之间建立安全上下文(Security Establishment)
S55c.UE-1与UE-4之间直接通信接受(单播)。
S56b.UE-1与UE-2之间单播链路上的ProSe服务数据。
S56c.UE-1与UE-4之间单播链路上的ProSe服务数据。
图6是根据本申请一实施例的发现方法200的示意性流程图。该方法可选地可以应用于图1、图2所示的***，但并不仅限于此。该方法包括以下内容的至少部分内容。
S210、终端的近距离业务层基于近距离业务的发现类型进行发现。
可选地，该近距离业务的发现类型包括以下至少之一：
模式A；
模式B；
直接建立连接。
具体地，模式A的具体流程可以参见图3及其相关描述。模式B的具体流程可以参见图4及其相关描述。直接建立连接的具体流程可以参见图5及其相关描述。
可选地，近距离业务(ProSe)层从该终端的应用层接收指示信息，该指示信息包括发现类型。
可选地，终端内可以包括近距离业务层和应用层。应用层可以在近距离业务层之上。应用层可以与应用服务器交互，将来自应用服务器的信息发送给近距离业务层。近距离业务层可以支持各种近距离业务(ProSe)。
示例性地，终端的应用层可以从应用服务器接收指示信息。指示信息中可以包括该终端需要采用哪种发现类型进行发现。不同的发现类型可以采用不同的指示信息进行区分。
可选地，该指示信息中还可以包括近距离业务标识(ProSe ID)。例如，近距离业务层从应用层接收包括发现类型和ProSe ID的指示信息。使用该ProSe ID可以建立连接，以及进行数据传输等。
可选地，该指示信息还包括该终端是发起端或该终端是目的端。
示例性地，终端可以通过应用服务器协商确定自己的角色信息。例如，两个终端通过应用服务器协商，确定一个终端的是发起端，一个终端是目的端。应用服务器可以分别向这两个终端发送指示信息。其中，应用服务器向发起端发送的指示信息中包括发现类型以及该终端是发起端的信息。应用服务器向目的端发送的指示信息中包括发现类型以及该终端是目的端的信息。
可选地，该近距离业务层从核心网网元接收配置信息，配置信息中包括近距离业务标识与该发现类型的映射关系。
可选地，该映射关系可以包括多个近距离业务标识与其对应的发现类型的列表。
示例性地，终端可以从来自核心网的配置信息中获取发现类型。该配置信息可以是终端策略(UE policy)。例如，终端从核心网的一个或多个网元接收包括该终端的发现类型的配置信息。并且该配置信息中可以包括该终端的ProSe标识与发现类型的映射关系。当应用程序触发近距离业务层进行近距离业务的发现时，终端可以基于该ProSe标识确定对应的近距离业务或应用程序的发现类型。近距离业务或应用程序利用发现类型进行发现过程。例如：App1-ModelA/B，表示应用程序APP1对应模式A或模式B。
可选地，配置信息中还包括该终端是发起端或该终端是目的端。例如，该配置信息中的映射关系还包括该终端是发起端或该终端是目的端。
示例性地，终端还可以从核心网获取该终端的角色信息。例如，终端从核心网的一个或多个网元接收的配置信息中包括该终端的发现类型以及该终端是发起端或目的端。具体地，配置信息中的映射关系中可以包括该终端的发现类型、该终端是发起端或目的端、近距离业务标识等信息。当应用程序触发近距离业务层进行近距离业务的发现时，终端可以基于该ProSe标识确定对应的近距离业务或应用程序的发现类型。近距离业务或应用程序利用映射关系确定该终端是发起端还是目的端，并且基于发现类型进行发现过程。
可选地，近距离业务层从核心网网元接收配置信息，该配置信息中包括近距离业务标识与发现消息的层二标识(Layer 2 ID)的映射关系。
示例性地，终端的ProSe层从核心网接收的配置信息中，还可以包括ProSe标识与发现消息的Layer 2 ID的映射关系。如果终端是发起端，可以基于Layer 2 ID发送发现消息；如果终端是目的端，可以基于Layer 2 ID监听发现消息。
例如，与上述的获取发现类型的过程相结合，终端的ProSe层从核心网接收的配置信息中可以包括该终端的发现类型、该终端是发起端或目的端、ProSe标识与发现消息的Layer2 ID之间的映射关系。
再如，与上述的获取发现类型的过程相结合，终端可以从应用服务器获取该终端的发现类型、该终端是发起端或目的端。并且，该终端可以从核心网获取ProSe标识与发现消息的Layer 2 ID之间的映射关系。
可选地，该近距离业务层从核心网网元接收配置信息，该配置信息中包括近距离业务标识与该发现类型的发现消息的Layer 2 ID的映射关系。
示例性地，终端的ProSe层从核心网接收的配置信息中，还可以包括ProSe标识与发现类型的发现消息的Layer 2 ID的映射关系。不同的发现类型的发现消息可以具有不同的Layer 2 ID。
例如，与上述的获取发现类型的过程相结合，终端的ProSe层从核心网接收的配置信息中可以包括该终端的发现类型、该终端是发起端或目的端、ProSe标识与发现类型的发现消息的Layer 2 ID之间的映射关系。
再如，与上述的获取发现类型的过程相结合，终端可以从应用服务器获取该终端的发现类型、该终端是发起端或目的端。并且，该终端可以从核心网获取ProSe标识与发现类型的发现消息的Layer 2 ID之间的映射关系。
可选地，该近距离业务层从核心网网元接收配置信息之前，该终端向该核心网网元指示请求该配置信息的类型。这样，核心网网元可以针对终端所请求的配置信息的类型，返回终端所需的配置信息。不需要返回全部类型的配置信息。
可选地，该配置信息的类型包括以下至少之一：
用于发现的配置信息；
用于PC5接口通信的配置信息；
作为终端到网络UE-to-network的中继终端的配置信息；
作为终端到网络UE-to-network的远程终端的配置信息；
作为终端到终端UE-to-UE的中继终端的配置信息；
作为终端到终端UE-to-UE的远程终端的配置信息。
例如，UE向PCF发送请求的策略的类型，例如：用于发现(discovery)的配置信息，用于通信(communication)的配置信息，作为中继(relay)的配置信息等。
可选地，该映射关系还包括关联的区域。这样，当终端处于该关联的区域内的情况下，该终端可以使用该映射关系。
例如，终端的ProSe层从核心网接收的配置信息中可以包括该终端的发现类型、该终端是发起端或目的端、关联的区域之间的映射关系。
再如，终端的ProSe层从核心网接收的配置信息中可以包括该终端的发现类型、该终端是发起端或目的端、关联的区域、ProSe标识之间的映射关系。
再如，终端的ProSe层从核心网接收的配置信息中可以包括该终端的发现类型、该终端是发起端或目的端、关联的区域、ProSe标识与发现消息的Layer 2 ID之间的映射关系。
再如，终端的ProSe层从核心网接收的配置信息中可以包括该终端的发现类型、该终端是发起端或目的端、关联的区域、ProSe标识与发现类型的发现消息的Layer 2 ID之间的映射关系。
可选地，该区域包括以下至少之一：
陆上公用移动通信网(PLMN)；
小区标识(Cell ID)集合；
跟踪区域标识(Tracking Area Identity，TAI)集合；
全球定位***(Global Positioning System，GPS)集合。
可选地，该核心网网元包括以下至少之一：
策略控制功能(PCF)；
接入和移动管理功能(AMF)；
统一数据管理(Unified Data Management，UDM)。
可选地，S210终端的近距离业务层基于近距离业务的发现类型进行发现，具体可以包括：在该终端为发起端的情况下，该终端生成该发现类型对应的信令。
示例性地，终端可以基于指示信息或配置信息确定自己的发现类型和角色信息。假设两个终端，一个为发起端，一个目的端。发起端可以基于自己的发现类型，生成与该发现类型对应的信令，然后向目的端发送该信令。目的端则可以基于自己的发现类型，在发现类型对应的逻辑信道上监测信令。
可选地，该信令为发现消息或连接建立请求消息。
示例性地，在模式A或模式B的发现类型中，发起端生成的信令可以为，与模式A或模式B对应的发现消息。然后发起端可以向目的端发送该发现消息。
示例性地，在直接建立连接的发现类型中，发起端生成的信令可以为连接建立请求消息。然后发起端可以向目的端发送该连接建立请求消息。
可选地，不同发现类型对应的信令具有不同的格式。
例如，模式A与模式B对应的信令可以具有不同的格式。再如，模式A、模式B与直接建立连接对应的信令可以具有不同的格式。再如，模式A、模式B对应的信令的格式相同，但是模式A、模式B对应的信令与直接建立连接对应的信令具有不同的格式。
可选地，该信令中包括该发现类型。
示例性地，相同格式的信令可以通过不同的参数值表示不同的发现类型。例如，模式A对应的信令A1与模式B对应的信令B1的格式相同，但是信令A1与信令B1中采用不同的参数值表示不同的发现类型。再如，模式A、模式B与直接建立连接对应的信令中分别采用不同的参数值表示不同的发现类型。
可选地，不同的发现类型对应的信令通过不同的逻辑信道进行传输，并且使用不同的layer 2 ID。
例如，不同发现类型的逻辑信道可以使用不同的layer 2 ID。
可选地，S210终端的近距离业务层基于近距离业务的发现类型进行发现，具体可以包括：在该终端为目的端的情况下，该终端在该发现类型对应的逻辑信道上监测信令。
在本申请实施例中，终端的近距离业务层基于近距离业务的发现类型进行发现，可以使终端区分近距离业务的不同发现类型，有利于终端按照发现类型进行发现流程。例如，作为发起端终端可以按照获取的发现类型生成并发送信令，目的端终端可以按照获取的发现类型监测信令。这样，有利于快速准确地进行发现以及连接。
在具体的应用示例中，UE可以获取ProSe和发现类型的映射关系；然后，发起端UE可以映射关系选择对应的发现类型，产生发现消息。目的端UE可以在发现类型对应的逻 辑信道上监测信令。
示例1，参见图7，该示例可以包括以下步骤：
S71a、UE1内的应用层可以决定需要使用哪种发现类型(或称为发现方式)，并发送指示(indication)信息(可以简称指示)给近距离业务层(ProSe layer)。该指示信息可以指示模式(Model)A、模式B、直接建立连接等发现类型。例如，模式(Model)A、模式B、直接建立连接分别对应不同的指示信息。也可以用于区分模式A/B对应一个指示信息，直接建立连接对应一个指示信息。应用层还指示UE1作为发起端UE或者目的端UE。
S71b、UE2内的应用层也可以发送相同指示信息给UE2的ProSe层。应用层还可以指示UE2作为目的端UE或者发起端UE。
其中，S71a与S71b没有时序限制，可以由两个终端分别独立执行。在执行S71a与S71b之前，两个UE可以通过应用服务器协商确定二者的发现类型、角色信息等。
S72a、U1的ProSe层收到指示信息后形成与指示信息(或发现类型)对应的信令。例如发现消息(Discovery message)或者连接请求建立消息(Direct link establishment request)。其中，对应的信令可以具有不同的格式，包含不同的参数。可选地，模式A和模式B也可以使用相同信令中的类型(type)来区分。可选地，模式A、模式B和直接建立连接可以使用不同的逻辑信道进行传输。
S72b、UE2的ProSe层收到指示信息后，如果确定自己是目的端UE，可以决定在发现类型对应的逻辑信道上监测信令。
其中，S72a与S72b没有时序限制，可以由两个终端分别独立执行。
示例2，参见图8，该示例可以包括以下步骤：
S81、网元分别配置UE1和UE2。该配置信息可以为UE策略(policy)。其中可以包含ProSe ID与发现类型的映射关系(或称为对应关系)。该映射关系还可以与某个区域关联，这样，UE在该区域下才可以使用该映射关系。该区域的表征方式可以为：PLMN，小区ID集合，TAI集合，GPS集合等。另外，如果发现类型只表征某一种，那么不在该映射关系内的其它ProSe则可以使用除该发现类型以外的发现类型。可选地，还可以另外指示UE作为发起端还是目的端。
S82a、UE1ProSe layer收到该映射关系后，如果确定自己是发起端UE，产生ProSe ID对应的信令。其中，对应的信令可以具有不同的格式，包含不同的参数。可选地，模式A和模式B也可以使用相同信令中的类型(type)来区分。可选地，模式A、模式B和直接建立连接可以使用不同的逻辑信道进行传输。
S82b、UE2的ProSe层收到该映射信息后，如果确定自己是目的端UE，可以决定在发现类型对应的逻辑信道上监测信令。
其中，S82a与S82b没有时序限制，可以由两个终端分别独立执行。
图9是根据本申请一实施例的终端400的示意性框图。该终端400可以包括：
发现单元410，用于通过近距离业务层基于近距离业务的发现类型进行发现。
可选地，如图10所示，该终端还包括：
第一接收单元420，用于通过该近距离业务层从该终端的应用层接收指示信息，该指 示信息包括该发现类型。
可选地，该指示信息还包括该终端是发起端或该终端是目的端。
可选地，该终端还包括：
第二接收单元430，用于通过该近距离业务层从核心网网元接收配置信息，该配置信息中包括近距离业务标识与该发现类型的映射关系。
可选地，配置信息中还包括该终端是发起端或该终端是目的端。例如，该配置信息中的映射关系还包括该终端是发起端或该终端是目的端。
可选地，该终端还包括：
第三接收单元440，用于通过该近距离业务层从核心网网元接收配置信息，该配置信息中包括近距离业务标识与发现消息的层二标识Layer 2 ID的映射关系。
可选地，该终端还包括：
第四接收单元450，用于通过该近距离业务层从核心网网元接收配置信息，该配置信息中包括近距离业务标识与该发现类型的发现消息的Layer 2 ID的映射关系。
可选地，该终端还包括：
指示单元460，用于在通过该近距离业务层从核心网网元接收配置信息之前，向该核心网网元指示请求该配置信息的类型。
可选地，该配置信息的类型包括以下至少之一：
用于发现的配置信息；
用于PC5接口通信的配置信息；
作为终端到网络UE-to-network的中继终端的配置信息；
作为终端到网络UE-to-network的远程终端的配置信息；
作为终端到终端UE-to-UE的中继终端的配置信息；
作为终端到终端UE-to-UE的远程终端的配置信息。
可选地，该映射关系还包括关联的区域。
可选地，该区域包括以下至少之一：
陆上公用移动通信网PLMN；
小区标识集合；
跟踪区域标识TAI集合；
全球定位***GPS集合。
可选地，该核心网网元包括以下至少之一：
策略控制功能PCF；
接入和移动管理功能AMF；
统一数据管理UDM。
可选地，该发现单元还用于在该终端为发起端的情况下，生成该发现类型对应的信令。
可选地，该信令为发现消息或连接建立请求消息。
可选地，不同发现类型对应的信令具有不同的格式。
可选地，该信令中包括该发现类型。
可选地，不同的发现类型对应的信令通过不同的逻辑信道进行传输，并且使用不同的layer 2 ID。
可选地，该发现单元还用于在该终端为目的端的情况下，在该发现类型对应的逻辑信道上监测信令。
可选地，该发现类型包括以下至少之一：
模式A；
模式B；
直接建立连接。
本申请实施例的终端400能够实现前述的方法实施例中的终端的对应功能。该终端400中的各个模块(子模块、单元或组件等)对应的流程、功能、实现方式以及有益效果，可参见上述方法实施例中的对应描述，在此不再赘述。需要说明，关于申请实施例的终端400中的各个模块(子模块、单元或组件等)所描述的功能，可以由不同的模块(子模块、单元或组件等)实现，也可以由同一个模块(子模块、单元或组件等)实现。
图11是根据本申请一实施例的发现方法300的示意性流程图。该方法可选地可以应用于图1、图2所示的***，但并不仅限于此。该方法包括以下内容的至少部分内容。
S310、网络设备向终端发送近距离业务的发现类型。这样，可以使得终端的近距离业务层基于近距离业务的发现类型进行发现。
可选地，该近距离业务的发现类型包括以下至少之一：
模式A；
模式B；
直接建立连接。
可选地，网络设备可以为应用服务器。网络设备可以向终端的应用层发送指示信息，该指示信息包括近距离业务的发现类型。
可选地，终端内可以包括近距离业务层和应用层。应用层可以在近距离业务层之上。应用层可以与应用服务器交互，将来自应用服务器的信息发送给近距离业务层。近距离业务层可以支持各种近距离业务(ProSe)。
示例性地，终端的应用层可以从应用服务器接收指示信息。指示信息中可以包括该终端需要采用哪种发现类型进行发现。不同的发现类型可以采用不同的指示信息进行区分。
可选地，该指示信息中还可以包括近距离业务标识(ProSe ID)。例如，近距离业务层从应用层接收包括发现类型和ProSe ID的指示信息。使用该ProSe ID可以建立连接，以及进行数据传输等。
可选地，该指示信息还包括该终端是发起端或该终端是目的端。
可选地，网络设备可以是核心网网元。网络设备可以向终端发送配置信息，配置信息中包括近距离业务标识与该发现类型的映射关系。
可选地，该映射关系可以包括多个近距离业务标识与其对应的发现类型的列表。
示例性地，终端可以从来自核心网的配置信息中获取发现类型。该配置信息可以是终端策略(UE policy)。例如，终端从核心网的一个或多个网元接收包括该终端的发现类型 的配置信息。并且该配置信息中可以包括该终端的ProSe标识与发现类型的映射关系。当应用程序触发近距离业务层进行近距离业务的发现时，终端可以基于该ProSe标识确定对应的近距离业务或应用程序的发现类型。近距离业务或应用程序利用发现类型进行发现过程。例如：App1-ModelA/B，表示应用程序APP1对应模式A或模式B。
可选地，配置信息中还包括该终端是发起端或该终端是目的端。例如，该映射关系还包括该终端是发起端或该终端是目的端。
示例性地，核心网还可以向终端发送该终端的角色信息。例如，终端从核心网的一个或多个网元接收的配置信息中包括该终端的发现类型以及该终端是发起端或目的端。具体地，配置信息中的映射关系中可以包括该终端的发现类型、该终端是发起端或目的端、近距离业务标识等信息。当应用程序触发近距离业务层进行近距离业务的发现时，终端可以基于该ProSe标识确定对应的近距离业务或应用程序的发现类型。近距离业务或应用程序利用映射关系确定该终端是发起端还是目的端，并且基于发现类型进行发现过程。
可选地，核心网网元向终端的近距离业务层发送配置信息，该配置信息中包括近距离业务标识与发现消息的层二标识(Layer 2 ID)的映射关系。
可选地，核心网网元向终端的近距离业务层发送配置信息，该配置信息中包括近距离业务标识与该发现类型的发现消息的Layer 2 ID的映射关系。
可选地，核心网网元向终端的近距离业务层发送配置信息之前，该核心网网元接收终端请求该配置信息的类型的指示。这样，核心网网元可以针对终端所请求的配置信息的类型，返回终端所需的配置信息。不需要返回全部类型的配置信息。
可选地，该配置信息的类型包括以下至少之一：
用于发现的配置信息；
用于PC5接口通信的配置信息；
作为终端到网络UE-to-network的中继终端的配置信息；
作为终端到网络UE-to-network的远程终端的配置信息；
作为终端到终端UE-to-UE的中继终端的配置信息；
作为终端到终端UE-to-UE的远程终端的配置信息。
例如，UE向PCF发送请求的策略的类型，例如：用于发现(discovery)的配置信息，用于通信(communication)的配置信息，作为中继(relay)的配置信息等。
可选地，该映射关系还包括关联的区域。这样，当终端处于该关联的区域内的情况下，该终端可以使用该映射关系。
可选地，该区域包括以下至少之一：
陆上公用移动通信网(PLMN)；
小区标识(Cell ID)集合；
跟踪区域标识(Tracking Area Identity，TAI)集合；
全球定位***(Global Positioning System，GPS)集合。
可选地，该核心网网元包括以下至少之一：
策略控制功能(PCF)；
接入和移动管理功能(AMF)；
统一数据管理(Unified Data Management，UDM)。
本实施例的网络设备执行方法300的具体示例可以参见上述方法200的中关于网络设备例如应用服务器或核心网网元的相关描述，为了简洁，在此不再赘述。
图12是根据本申请一实施例的网络设备500的示意性框图。该网络设备500可以包括：
发送单元510，用于向终端发送近距离业务的发现类型。这样，终端的近距离业务层可以基于近距离业务的发现类型进行发现。
可选地，该近距离业务的发现类型包括以下至少之一：
模式A；
模式B；
直接建立连接。
可选地，网络设备可以为应用服务器。网络设备的发送单元510可以向终端的应用层发送指示信息，该指示信息包括近距离业务的发现类型。
可选地，该指示信息中还可以包括近距离业务标识(ProSe ID)。例如，近距离业务层从应用层接收包括发现类型和ProSe ID的指示信息。使用该ProSe ID可以建立连接，以及进行数据传输等。
可选地，该指示信息还包括该终端是发起端或该终端是目的端。
可选地，网络设备可以是核心网网元。网络设备的发送单元510可以向终端发送配置信息，配置信息中包括近距离业务标识与该发现类型的映射关系。
可选地，该映射关系可以包括多个近距离业务标识与其对应的发现类型的列表。
可选地，配置信息中还包括该终端是发起端或该终端是目的端。例如，该映射关系还包括该终端是发起端或该终端是目的端。
可选地，核心网网元的发送单元510向终端的近距离业务层发送配置信息，该配置信息中包括近距离业务标识与发现消息的层二标识(Layer 2 ID)的映射关系。
可选地，核心网网元的发送单元510向终端的近距离业务层发送配置信息，该配置信息中包括近距离业务标识与该发现类型的发现消息的Layer 2 ID的映射关系。
可选地，核心网网元的发送单元510向终端的近距离业务层发送配置信息之前，该核心网网元接收终端请求该配置信息的类型的指示。这样，核心网网元可以针对终端所请求的配置信息的类型，返回终端所需的配置信息。不需要返回全部类型的配置信息。
可选地，该配置信息的类型包括以下至少之一：
用于发现的配置信息；
用于PC5接口通信的配置信息；
作为终端到网络UE-to-network的中继终端的配置信息；
作为终端到网络UE-to-network的远程终端的配置信息；
作为终端到终端UE-to-UE的中继终端的配置信息；
作为终端到终端UE-to-UE的远程终端的配置信息。
例如，UE向PCF发送请求的策略的类型，例如：用于发现(discovery)的配置信息，用于通信(communication)的配置信息，作为中继(relay)的配置信息等。
可选地，该映射关系还包括关联的区域。这样，当终端处于该关联的区域内的情况下，该终端可以使用该映射关系。
可选地，该区域包括以下至少之一：
陆上公用移动通信网(PLMN)；
小区标识(Cell ID)集合；
跟踪区域标识(Tracking Area Identity，TAI)集合；
全球定位***(Global Positioning System，GPS)集合。
可选地，该核心网网元包括以下至少之一：
策略控制功能(PCF)；
接入和移动管理功能(AMF)；
统一数据管理(Unified Data Management，UDM)。
本申请实施例的网络设备500能够实现前述的方法实施例中的网络设备的对应功能。该网络设备500中的各个模块(子模块、单元或组件等)对应的流程、功能、实现方式以及有益效果，可参见上述方法实施例中的对应描述，在此不再赘述。需要说明，关于申请实施例的网络设备500中的各个模块(子模块、单元或组件等)所描述的功能，可以由不同的模块(子模块、单元或组件等)实现，也可以由同一个模块(子模块、单元或组件等)实现。
图13是根据本申请实施例的通信设备600示意性结构图。该通信设备600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以使通信设备600实现本申请实施例中的方法。
可选地，通信设备600还可以包括存储器620。其中，处理器610可以从存储器620中调用并运行计算机程序，以使通信设备600实现本申请实施例中的方法。
其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，通信设备600还可以包括收发器630，处理器610可以控制该收发器630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备600可为本申请实施例的终端，并且该通信设备600可以实现本申请实施例的各个方法中由终端实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备600可为本申请实施例的网络设备，并且该通信设备600可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
图14是根据本申请实施例的芯片700的示意性结构图。该芯片700包括处理器710，处理器710可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，芯片700还可以包括存储器720。其中，处理器710可以从存储器720中调用并运行计算机程序，以实现本申请实施例中由终端执行的方法。
其中，存储器720可以是独立于处理器710的一个单独的器件，也可以集成在处理器710中。
可选地，该芯片700还可以包括输入接口730。其中，处理器710可以控制该输入接口730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片700还可以包括输出接口740。其中，处理器710可以控制该输出接口740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的终端，并且该芯片可以实现本申请实施例的各个方法中由终端实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
应用于网络设备和终端设备的芯片可以是相同的芯片或不同的芯片。
应理解，本申请实施例提到的芯片还可以称为***级芯片，***芯片，芯片***或片上***芯片等。
上述提及的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、现成可编程门阵列(field programmable gate array，FPGA)、专用集成电路(application specific integrated circuit，ASIC)或者其他可编程逻辑器件、晶体管逻辑器件、分立硬件组件等。其中，上述提到的通用处理器可以是微处理器或者也可以是任何常规的处理器等。
上述提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图15是根据本申请实施例的通信***800的示意性框图。该通信***800包括至少两个终端，例如终端810和终端820。
终端810和终端820，用于通过近距离业务层基于近距离业务的发现类型进行发现。
其中，该终端810和终端820可以用于实现上述方法中由终端实现的相应的功能。为了简洁，在此不再赘述。
在一种实现方式中，如果终端810为发起端，该终端810生成发现类型对应的信令。此外，终端810还可以采用模式A、模式B或直接建立连接等方式，发送该信令。如果终端820为目的端，终端820在发现类型对应的逻辑信道上监测信令。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行该计算机程序指令时，全部或部分地产生按照本申请实施例中的流程或功能。该计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。该计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，该计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(Digital Subscriber Line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。该计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。该可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(Solid State Disk，SSD))等。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的***、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
以上所述仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以该权利要求的保护范围为准。

Claims (43)

  1. 一种发现方法，包括：
    终端的近距离业务层基于近距离业务的发现类型进行发现。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    所述近距离业务层从所述终端的应用层接收指示信息，所述指示信息包括所述发现类型。
  3. 根据权利要求1或2所述的方法，其中，所述指示信息还包括所述终端是发起端或所述终端是目的端。
  4. 根据权利要求1至3中任一项所述的方法，其中，所述方法还包括：
    所述近距离业务层从核心网网元接收配置信息，所述配置信息中包括近距离业务标识与所述发现类型的映射关系。
  5. 根据权利要求4所述的方法，其中，所述配置信息中还包括所述终端是发起端或所述终端是目的端。
  6. 根据权利要求1至3中任一项所述的方法，其中所述方法还包括：
    所述近距离业务层从核心网网元接收配置信息，所述配置信息中包括近距离业务标识与发现消息的层二标识Layer 2 ID的映射关系。
  7. 根据权利要求1至3中任一项所述的方法，其中所述方法还包括：
    所述近距离业务层从核心网网元接收配置信息，所述配置信息中包括近距离业务标识与所述发现类型的发现消息的Layer 2 ID的映射关系。
  8. 根据权利要求4至7中任一项所述的方法，其中，所述方法还包括：
    所述近距离业务层从核心网网元接收配置信息之前，所述终端向所述核心网网元指示请求所述配置信息的类型。
  9. 根据权利要求8所述的方法，其中，所述配置信息的类型包括以下至少之一：
    用于发现的配置信息；
    用于PC5接口通信的配置信息；
    作为终端到网络UE-to-network的中继终端的配置信息；
    作为终端到网络UE-to-network的远程终端的配置信息；
    作为终端到终端UE-to-UE的中继终端的配置信息；
    作为终端到终端UE-to-UE的远程终端的配置信息。
  10. 根据权利要求4至9中任一项所述的方法，其中，所述映射关系还包括关联的区域。
  11. 根据权利要求10所述的方法，其中，所述区域包括以下至少之一：
    陆上公用移动通信网PLMN；
    小区标识集合；
    跟踪区域标识TAI集合；
    全球定位***GPS集合。
  12. 根据权利要求4至11中任一项所述的方法，其中，所述核心网网元包括以下至少 之一：
    策略控制功能PCF；
    接入和移动管理功能AMF；
    统一数据管理UDM。
  13. 根据权利要求1至12中任一项所述的方法，其中，终端的近距离业务层基于近距离业务的发现类型进行发现，包括：
    在所述终端为发起端的情况下，所述终端生成所述发现类型对应的信令。
  14. 根据权利要求13所述的方法，其中，所述信令为发现消息或连接建立请求消息。
  15. 根据权利要求13或14所述的方法，其中，不同发现类型对应的信令具有不同的格式。
  16. 根据权利要求13至15中任一项所述的方法，其中，所述信令中包括所述发现类型。
  17. 根据权利要求13至16中任一项所述的方法，其中，不同的发现类型对应的信令通过不同的逻辑信道进行传输，并且使用不同的layer 2 ID。
  18. 根据权利要求1至17中任一项所述的方法，其中，终端的近距离业务层基于近距离业务的发现类型进行发现，包括：
    在所述终端为目的端的情况下，所述终端在所述发现类型对应的逻辑信道上监测信令。
  19. 根据权利要求1至18中任一项所述的方法，其中，所述发现类型包括以下至少之一：
    模式A；
    模式B；
    直接建立连接。
  20. 一种终端，包括：
    发现单元，用于通过近距离业务层基于近距离业务的发现类型进行发现。
  21. 根据权利要求20所述的终端，其中，所述终端还包括：
    第一接收单元，用于通过所述近距离业务层从所述终端的应用层接收指示信息，所述指示信息包括所述发现类型。
  22. 根据权利要求20或21所述的终端，其中，所述指示信息还包括所述终端是发起端或所述终端是目的端。
  23. 根据权利要求20至22中任一项所述的终端，其中，所述终端还包括：
    第二接收单元，用于通过所述近距离业务层从核心网网元接收配置信息，所述配置信息中包括近距离业务标识与所述发现类型的映射关系。
  24. 根据权利要求23所述的终端，其中，所述配置信息中还包括所述终端是发起端或所述终端是目的端。
  25. 根据权利要求20至22中任一项所述的终端，其中所述终端还包括：
    第三接收单元，用于通过所述近距离业务层从核心网网元接收配置信息，所述配置信息中包括近距离业务标识与发现消息的层二标识Layer 2 ID的映射关系。
  26. 根据权利要求20至22中任一项所述的终端，其中所述终端还包括：
    第四接收单元，用于通过所述近距离业务层从核心网网元接收配置信息，所述配置信息中包括近距离业务标识与所述发现类型的发现消息的Layer 2 ID的映射关系。
  27. 根据权利要求23至26中任一项所述的终端，其中，所述终端还包括：
    指示单元，用于在通过所述近距离业务层从核心网网元接收配置信息之前，向所述核心网网元指示请求所述配置信息的类型。
  28. 根据权利要求27所述的终端，其中，所述配置信息的类型包括以下至少之一：
    用于发现的配置信息；
    用于PC5接口通信的配置信息；
    作为终端到网络UE-to-network的中继终端的配置信息；
    作为终端到网络UE-to-network的远程终端的配置信息；
    作为终端到终端UE-to-UE的中继终端的配置信息；
    作为终端到终端UE-to-UE的远程终端的配置信息。
  29. 根据权利要求23至28中任一项所述的终端，其中，所述映射关系还包括关联的区域。
  30. 根据权利要求29所述的终端，其中，所述区域包括以下至少之一：
    陆上公用移动通信网PLMN；
    小区标识集合；
    跟踪区域标识TAI集合；
    全球定位***GPS集合。
  31. 根据权利要求23至30中任一项所述的终端，其中，所述核心网网元包括以下至少之一：
    策略控制功能PCF；
    接入和移动管理功能AMF；
    统一数据管理UDM。
  32. 根据权利要求20至31中任一项所述的终端，其中，所述发现单元还用于在所述终端为发起端的情况下，生成所述发现类型对应的信令。
  33. 根据权利要求32所述的终端，其中，所述信令为发现消息或连接建立请求消息。
  34. 根据权利要求32或33所述的终端，其中，不同发现类型对应的信令具有不同的格式。
  35. 根据权利要求32至34中任一项所述的终端，其中，所述信令中包括所述发现类型。
  36. 根据权利要求32至35中任一项所述的终端，其中，不同的发现类型对应的信令通过不同的逻辑信道进行传输，并且使用不同的layer 2 ID。
  37. 根据权利要求20至36中任一项所述的终端，其中，所述发现单元还用于在所述终端为目的端的情况下，在所述发现类型对应的逻辑信道上监测信令。
  38. 根据权利要求20至37中任一项所述的终端，其中，所述发现类型包括以下至少之一：
    模式A；
    模式B；
    直接建立连接。
  39. 一种终端，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，以使所述终端执行如权利要求1至19中任一项所述的方法。
  40. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至19中任一项所述的方法。
  41. 一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被设备运行时使得所述设备执行如权利要求1至19中任一项所述的方法。
  42. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至19中任一项所述的方法。
  43. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1至19中任一项所述的方法。
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