Abstract: This application provides a context management method and apparatus, to resolve a problem that contexts of a large quantity of terminals occupy a large amount of storage space of an AMF entity. The method includes: when a first core network device has stored group information corresponding to a terminal, establishing, by the first core network device, a correspondence between the terminal and the group information. This application relates to the field of communications technologies.

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 spectrum resource sharing method includes determining, by a mobility management entity, that a first terminal device is configured to be allowed to occupy a spectrum resource of a first network, wherein the first terminal device is configured to subscribe to a second network, and the mobility management entity is in the second network. The spectrum resource sharing method further includes sending, by the mobility management entity, first indication information to an access network device, wherein the first indication information is useable to indicate that the first terminal device is configured to be allowed to occupy the spectrum resource of the first network, and the access network device is shared by the first network and the second network.

Abstract: This application discloses a communication method and a communications apparatus. The method includes: receiving, by a mobility management network element, a registration request message from a terminal, where the registration request message is used to request a vehicle-to-everything V2X configuration parameter for the terminal, and the V2X configuration parameter is used by the terminal to perform a V2X service; sending, by the mobility management network element, a parameter request message to a V2X parameter configuration network element based on the registration request message, where the parameter request message is used to request the V2X configuration parameter of the terminal from the V2X parameter configuration network element; and receiving, by the mobility management network element, the V2X configuration parameter from the V2X parameter configuration network element, and sending the V2X configuration parameter to the terminal. Use of this application helps improve security of the V2X service.

Abstract: This application provides a communication method and a communication apparatus. In a technical solution of this application, when a preset condition is met, an access network device notifies user equipment that a multicast session is to be released or is to be deactivated. If the multicast session is being used or is to be used, the user equipment may feed back to the access network device that the user equipment is still interested in a multicast service. The access network device may determine, based on whether the feedback from the user equipment is received within a preset time period, whether to continue to release or deactivate the multicast session. In this way, when user equipment in an idle state can receive multicast data, this technical solution can properly manage the multicast session.

Abstract: The technology provides a session establishment method and device. The method includes sending, by an SMF entity, a PDU session establishment request message to a terminal, where the PDU session establishment request message is used to request to establish a PDU session; and receiving, by the SMF entity, a PDU session establishment response message from the terminal. A method for actively initiating a PDU session establishment procedure on a network side is provided.

Abstract: This application discloses example communications methods and apparatuses. One example method includes receiving a first request message from a terminal, where the first request message is used to request information used for PC5 interface-based communication of the terminal. A second request message can be sent to a policy and charging function network element based on the first request message, where the second request message is used to request the information used for the PC5 interface-based communication. A quality of service (QoS) rule used for the PC5 interface-based communication can then be received from the policy and charging function network element. The QoS rule can then be sent to the terminal based on the first request message, where the apparatus is a mobility management network element or located in a mobility management network element.

Abstract: This application discloses an authorization revocation method and an apparatus, and relates to the communications field. An example method includes: receiving, by a first entity, an authorization revocation request message from a second entity, wherein 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, wherein the authorization revocation response message indicates that authorization revocation succeeds or fails.

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 a multipath transmission method and a communication apparatus. In this solution, data of a remote terminal is transmitted through two paths, to improve data transmission reliability of the remote terminal. The solution includes: A user plane function node receives second information from a session management function node; and the user plane function node replicates, based on the second information to the second communication path, data that is of the remote terminal and that is transmitted through a first communication path. The first communication path is a first session of the remote terminal, and the second communication path includes a second session of a relay terminal corresponding to the remote terminal and a sidelink between the relay terminal and the remote terminal.

Abstract: This application discloses a method for dynamically triggering instantiation of an edge application server, and an apparatus. The method includes: A first device receives first information, where the first information is for requesting information about an edge application server of a first application, or is for requesting information about a first edge enabler server, where the first edge enabler server is configured to provide information about an edge application server of a first application; and the first device requests, based on the first information, an edge application server management function entity to instantiate the edge application server of the first application. In embodiments of this application, the edge application server is instantiated based on a user requirement, so that dynamic scheduling and flexible use of a resource are improved, and quality of service experience of an edge application is improved.

Abstract: An application context relocation method and apparatus are provided. One example method includes: receiving first information from an application function entity, where the first information is for indicating to relocate an application context associated with the application function entity; and when an event that triggers relocation of the application context occurs, determining, based on the first information, to relocate the application context.

Abstract: A data communication method includes receiving a first message. The first message includes an identifier of a second terminal, and the first message requests to perform communication of a first application between a first terminal and the second terminal. The data communication method also includes sending first information to an access network device based on the first message. The first information includes an identifier of a first bearer and an identifier of a second bearer, the first bearer is for transmitting data of the first application for the first terminal, the second bearer is for transmitting the data of the first application for the second terminal, and the first information is used by the access network device to directly forward the data of the first application between the first terminal and the second terminal.

Abstract: This application discloses a communications system, a communication method, and an apparatus thereof. The system includes: a multicast session management network element, an access and mobility management network element and a user plane function network element. The multicast session management network element sends a first multicast session request carrying a multicast session context to the access and mobility management network element to request to establish a multicast session based on the multicast session context; and sends a second multicast session request to the user plane function network element, where the second multicast session request carries user plane forwarding-related information indicating a user plane forwarding rule of the multicast session. The access and mobility management network element sends the first multicast session request to an access network node.

Abstract: Embodiments of this application disclose a dynamic information obtaining method and a related device thereof, and may be applied to the field of artificial intelligence. The method includes: A first enabler server obtains information about an enabler client in a target area of a target client; and the first enabler server sends a first message to the enabler client, where the first message is used for the enabler client reporting first information. The first information includes local dynamic information of the enabler client, and the first information is used for obtaining dynamic information associated with the target client.

Abstract: A communication method, applied to a scenario wherein a terminal device is moving from a source access network device to a target access network device and performing a multicast service, includes obtaining, by the target access network device, reference information of the multicast service, The reference information includes area information. The area information corresponds to a sub-service area of the multicast service. The method also includes sending, by the target access network device, information about a forwarding path based on the reference information. The forwarding path is used for the target access network device receiving data of the multicast service.

Abstract: This application relates to the field of communication technologies and discloses communication methods and apparatuses. One method includes: determining, by a first terminal device, a first discontinuous reception (DRX) parameter based on a transmission requirement of a first vehicle-to-everything (V2X) service, wherein the transmission requirement comprises a service requirement, and sending, by the first terminal device to a second terminal device, the first DRX parameter for proximity communication 5 (PC5) communication of the first V2X service between the first terminal device and the second terminal device.

Abstract: A communication method and apparatus are disclosed. The method includes a first terminal device determines a candidate relay device, where the candidate relay device includes at least one relay device, and sends a first message to a second terminal device, where the first message is used to request to change a relay device, and the first message includes an identifier of the candidate relay device. In the foregoing manner, the first terminal device may determine the candidate relay device, and send the first message to the second terminal device, so that the second terminal device can determine a second relay device from the candidate relay device based on the first message. In this way, a relay device between the first terminal device and the second terminal device can be changed from a first relay device to the second relay device.

Abstract: This application discloses a deterministic transmission method, a communication apparatus, and a storage medium, and relates to the communication field. In the method, a radio access network device may generate deterministic transmission capability information of a first switching node, and send the deterministic transmission capability information to a first network element. The first switching node includes the radio access network device and a terminal. Then, the radio access network device may receive a first scheduling policy that is delivered by the first network element based on the deterministic transmission capability information of the first switching node, so that deterministic transmission can be performed according to the first scheduling policy. This reduces a delay variation of a QoS flow carrying a TSN flow in a 5GS, and can avoid a need to select a QoS flow whose delay indicator is excessively high for the TSN flow.

Abstract: A communication method includes receiving, by a first edge configuration server (ECS), a public land mobile network (PLMN) identifier of a second network from a first device, wherein the first device includes a terminal device or a first edge enabler server (EES). The communication method further includes sending, by the first ECS, first request information to a second ECS based on the PLMN identifier. The communication method further includes receiving, by the first ECS, the information of the second EES from the second ECS. The first request information is useable for requesting information of a second EES. A first network is a home network of the terminal device. The first ECS and the first EES correspond to the first network. The second network is a serving network of the terminal device. The second ECS and the second EES correspond to the second network.