Abstract: Embodiments of this application disclose an information obtaining method that may be applied to the multi-access edge computing MEC field, for example, a vehicle to everything scenario of MCE or an internet of things scenario of the MEC. The method in the embodiments of this application includes: A first server receives information about a first instance of an application and information about a second instance of the application from a second server and a third server respectively, and then the first server stores the information about the first instance and the information about the second instance. In this way, the first server can centrally maintain information about different instances of the application, so that another device can directly obtain the information about the application instances from the first server.

Abstract: The present application relates to broadcast bearer management methods and devices. One example method includes receiving, by a first bearer management server (BMS), a first message sent by a service server, where the first message includes a group identifier of a service group, determining, by the first BMS, a first broadcast bearer for the service group based on the first message, and sending, by the first BMS, a second message to the service server, where the second message carries user plane information of the first broadcast bearer.

Abstract: Embodiments of the present invention disclose a communication method and apparatus. an example method includes: setting up a first radio bearer for a first terminal device, where the first radio bearer is used to transmit a first service; allocating a first RNTI and a second RNTI to the first terminal device, where the first RNTI is used to schedule a service for the first terminal device, and the second RNTI is used to schedule the first service for a group of terminal devices including the first terminal device; and scheduling a data packet of the first service for the first terminal device on the first radio bearer by using the first RNTI and the second RNTI.

Abstract: An application relocation method includes: a source edge enabler server (EES) sends a first message to a target EES, where the first message is used to request to relocate an application of a terminal apparatus, and the first message includes an identifier of the terminal apparatus and an identifier of the application; and the source EES receives a second message from the target EES, where the second message is a response message of the first message, and the second message is used to indicate whether a relocation of the application of the terminal apparatus is allowed.

Abstract: This application discloses an authorization revocation method and an apparatus, and relates to the communications field. The method includes: receiving, by a first entity, an authorization revocation request message from a second entity, where the authorization revocation request message carries an identifier of an application programming interface (API) invocation entity; and sending, by the first entity, an authorization revocation response message to the second entity based on the authorization revocation request message.

Abstract: Embodiments of this application relate to the field of communications technologies, and disclose an application programming interface (API) topology hiding method, a device, and a system. A common API framework core function (CCF) receives, from a topology hiding request entity, a request message that includes information about an API and that is used to request to hide an API exposing function (AEF) that provides the API. Based on the request message, a topology hiding entry point used by an API invoker to invoke the API is determined. An identifier of the API and an identifier of the AEF that provides the API are sent to the topology hiding entry point so that the topology hiding entry point hides the AEF that provides the API.

Abstract: This application provides an unmanned aerial vehicle authentication method and an apparatus. The method includes: sending, by a communications device after determining that a type of a terminal is a UAV, authentication information of the terminal to an authentication server, so that the authentication server can perform authentication on the terminal based on the authentication information of the terminal, and therefore, the authentication server completes authentication on the terminal. In addition, the unmanned aerial vehicle is allowed to fly only after authentication on the terminal succeeds. Therefore, flight security of the unmanned aerial vehicle can be improved.

Abstract: In a method for establishing a communication bearer, a first device sends, to a first network device, a first message including indication information of a communication bearer, and receives second bearer information that is of a second device in a pairing relationship with the first device and that is obtained by the first network device based on the indication information of the communication bearer, so that the first device can establish a direct forwarding link without the participation of a server, and a communication delay between the first device and the second device can be effectively reduced.

Abstract: The present disclosure relates to communication methods and apparatus. One example method includes receiving, by a target service entity, a first request message from a first participating service entity, and sending, by the target service entity, a first response message to the first participating service entity. The first request message comprises an identity of a target multicast bearer and a group identity of a terminal group. The first response message is used to instruct the first participating service entity to use the target multicast bearer to send service data of the terminal group.

Abstract: Embodiments of this application relate to the field of communications technologies, and disclose an application programming interface (API) topology hiding method, a device, and a system, to hide, from an API invoker, an API exposing function (AEF) that provides an API. The method includes: receiving, by a common API framework core function (CCF) from a topology hiding request entity, a request message that includes information about an API and that is used to request to hide an AEF that provides the API; determining, based on the request message, a topology hiding entry point used by an API invoker to invoke the API; and sending, to the topology hiding entry point, an identifier of the API and an identifier of the AEF that provides the API, so that the topology hiding entry point hides the AEF that provides the API.

Abstract: A media downlink transmission control method and a related device, the method including receiving a remote media reception message sent by an authorized terminal, where the remote media reception message includes a target user identifier, determining a first target media stream based on the remote media reception message, and sending the first target media stream to a destination terminal corresponding to the target user identifier.

Abstract: A communication method performed by a first terminal device, where the method includes: receiving communication quality reference information of a Uu interface from a network device; and determining, based on the communication quality reference information of the Uu interface and communication quality information of a PC5 interface, a communication mode used to send target data to a second terminal device, where the communication mode is any one of the following: a Uu interface communication mode, a PC5 interface communication mode, or a multipath communication mode, where the PC5 interface is an interface for direct communication between the first terminal device and the second terminal device, and where communications interfaces in the multipath communication mode include the PC5 interface and the Uu interface.

Abstract: This application provides a method and an apparatus for invoking an application programming interface API, to determine a target exposing function network element used to invoke an API. The method includes: A first network element obtains routing information of an API, where the routing information is used to indicate a route for invoking the API, and the API is provided by a first exposing function network element and a second exposing function network element; the first network element obtains invocation parameter information of the API, where the invocation parameter information is used to handle the API; and the first network element determines a target exposing function network element in the first exposing function network element and the second exposing function network element based on the routing information and the invocation parameter information.

Abstract: This application provides example label management methods and apparatuses for a terminal device. One example method includes obtaining, by a first network device, a type of the terminal device, where the type of the terminal device includes an uncrewed aerial vehicle, a non-uncrewed aerial vehicle, or an undetermined type. The first network device can then send a request message to a label management device, where the request message is used to request the label management device to create a type label for the terminal device, and where the request message includes an identifier of the terminal device.

Abstract: Embodiments of this application disclose a communication method and device, and relate to the communications field, to efficiently deliver a vehicle-to-everything (V2X) message by using limited bandwidth resources of PC5. The method includes: receiving, by a first node, PC5 broadcast reference information from a second node, where the PC5 broadcast reference information is used to indicate to send target data from the second node in a PC5 interface broadcast mode; and sending, by the first node, the target data in the PC5 interface broadcast mode based on the PC5 broadcast reference information.

Abstract: Example uncrewed aerial vehicle communication methods and apparatus are described. One example method includes a first access network device receives indication information used to indicate access information of a next hop of the uncrewed aerial vehicle, where the access information includes at least one of information about a second access network device or information about a cell of a second access network device. The first access network device sends a first request based on the indication information, where the first request is used to request the second access network device to prepare an access resource for the uncrewed aerial vehicle. The second access network device prepares the access resource for the uncrewed aerial vehicle after receiving the first request.

Abstract: Examples in this application provide terminal identification methods and apparatus. One example method includes a first mobility management entity receiving a first request and sending, to an application server, a first response to the first request based on the first request. The first request is used to request to identify a first-type terminal, and the first response is used to indicate that the first-type terminal is identified.

Abstract: A method, an apparatus and a system for floor control on multiple mission critical push to talk MCPTT systems are disclosed. In an embodiment the method includes receiving, by a first floor control server, a first message from N network element devices, wherein the first message is used to request a floor from the first floor control server, and wherein the N network element devices belong to N MCPTT systems respectively, determining according to the first message, that an MCPTT user in an MCPTT group belonging to a first MCPTT system occupies the floor, wherein the first MCPTT system is an MCPTT system to which a first network element device belongs, and sending a second message to the first network element device, wherein the second message is used to indicate that the MCPTT user in the MCPTT group belonging to the first MCPTT system occupies the floor.

Abstract: A media downlink transmission control method and a related device, the method including receiving a remote media reception message sent by an authorized terminal, where the remote media reception message includes a target user identifier, determining a first target media stream based on the remote media reception message, and sending the first target media stream to a destination terminal corresponding to the target user identifier.

Abstract: An application programming interface (API) method includes determining, by a first common API core function (CCF) entity, a to-be-shared API, and sharing, by the first CCF entity, information about the to-be-shared API with a target CCF entity of the to-be-shared API.