Abstract: Embodiments of this application provide a communication method and an apparatus, to introduce artificial intelligence AI in a radio access network RAN. The method includes: A wireless intelligent controller RIC sends configuration information of one or more AI tasks to a base station. The configuration information of each AI task is used to indicate one or more of the following content of the AI task: a task identifier ID, a task type, task content, a task execution body, and a task status. The AI task may be executed by the base station or a terminal.

Abstract: This application provides a cell selection method and an apparatus. The method includes: A first terminal device determines a target network slice. The first terminal device determines a first public land mobile network (PLMN) based on the target network slice. The first terminal device determines a first cell based on the first PLMN and the target network slice, where received signal power of the first cell is greater than a first threshold.

Abstract: A communication method applied to an integrated access and backhaul (IAB) system includes: a child node receives a first radio resource control (RRC) reconfiguration message from an access network device via a parent node, where the first RRC reconfiguration message includes a random access-free indication. The child node starts a timer. The child node sends a first RRC reconfiguration complete message to the access network device via the parent node. The child node receives first indication information from the parent node, where the first indication information indicates to stop the timer. The child node stops the timer.

Abstract: Embodiments of this application disclose a mobile edge computing processing method and a related device, which may be applied to a scenario in which a local computing device (MEC) provides a computing service. A radio access network device determines a matched local computing device based on a PDU session setup request message of a terminal device UE and local computing capability information of a local computing device. Then, the radio access network device sets up a PDU session between the local computing device and the terminal device. A network device (including the radio access network device and a core network device) uses the local computing device as a computing resource of a network, and the network device controls communication and interaction between the UE and the local computing device.

Abstract: A computing service implementation method and an apparatus. The method includes: a first radio access network (RAN) device obtains computing capability information of a first communication device; the first RAN device sends a first request to the first communication device, where the first request is for requesting the first communication device to perform a computing service of the first RAN device; the first RAN device receives a first response from the first communication device, where the first response indicates the computing service that is of the first RAN device and that is admitted by the first communication device; and the first RAN device exchanges, with the first communication device, data of the computing service that is of the first RAN device and that is admitted by the first communication device.

Abstract: This application discloses a handover method and apparatus. During handover, a source RAN node includes, in a handover message, an indication indicating whether a PDU session supports network slice re-mapping and/or an indication indicating whether the PDU session supports network slice fallback. A target RAN node performs admission control based on the indication, and notifies the source RAN node of an identifier of a network slice to which the PDU session is re-mapped or an indication indicating whether the PDU session falls back to a default network slice. The source RAN node forwards the notification to a terminal device. This reduces signaling overheads caused during handover interaction.

Abstract: Embodiments of this disclosure provide a communication method, and an associated communication apparatus, medium, and chip. In a communication method, a target access network device receives first information, where the first information indicates a relationship between a first network slice in a first network and a second network slice in a second network, and the first network is different from the second network. The target access network device performs access control from a terminal device to the target access network device based on at least the first information. In this manner, in embodiments of this disclosure, the target access network device can perform access control on the terminal device during cross-network access, to reduce an access latency, reduce a service interruption problem caused by session rejection of the terminal device, and ensure service continuity of the terminal device.

Abstract: This application provides a communication method and a communication apparatus. A terminal device receives first information, where the first information indicates at least one supported network slice, the at least one supported network slice includes a network slice supported by a first cell and/or a network slice supported by a first access device, the first cell includes a cell currently accessed by the terminal device, and the first access device includes an access device currently accessed by the terminal device; the terminal device receives second information, where the second information indicates at least one allowed network slice; and the terminal device processes a session establishment request of a first service based on the first information and the second information, so that a waste of resources for transmission of the session establishment request can be reduced.

Abstract: A radio access network device receives first remapping information from a core network device, where the first remapping information includes an identifier of a first network slice and an identifier of at least one second network slice, and the first remapping information indicates that PDU sessions, in the first network slice, of a plurality of terminal devices connected to the radio access network device are to be remapped to one of the at least one second network slice; and the radio access network device sends first indication information to the core network device, where the first indication information includes the identifier of the second network slice, and the first indication information indicates the core network device to remap the PDU sessions, in the first network slice, of the terminal devices to the second network slice.

Abstract: The present disclosure relates to random access methods and terminal devices. One example method includes determining a first random access time-frequency resource corresponding to a first network slice service, where the first network slice service is a network slice service that is to be initiated, determining a random access type corresponding to the first network slice service, determining a second random access time-frequency resource from the first random access time-frequency resource based on the random access type, where the second random access time-frequency resource is a random access time-frequency resource corresponding to the random access type, and initiating random access based on the second random access time-frequency resource.

Abstract: The present disclosure relates to radio resource control (RRC) reestablishment methods and apparatuses. In one example method, a terminal device selects a target cell, where the target cell supports an expected network slice. The terminal device sends an RRC reestablishment request message by using the target cell. The expected network slice may include a network slice that the terminal device expects to access, or a network slice corresponding to a PDU session established by the terminal device by using a last serving access network device of the terminal device. The terminal device may select the target cell within a preset time period. For example, the terminal device starts a first timer when the terminal device starts selecting the target cell, and selects the target cell during running of the first timer. The first timer may be specific to one or more network slices or all network slices.

Abstract: A data transmission method applied to an access network and a device, the method including receiving, by a radio access network (RAN) device of an access network, a first data packet from a first terminal device, wherein the first data packet comprises a logical channel identifier (LCH ID), determining, by the RAN device, whether the LCH ID meets a first preset rule, and sending, by the RAN device, in response to determining that the LCH ID meets the first preset rule, the first data packet through a common radio link control (RLC) entity.

Abstract: The present teaching relates to tracking an event at a plurality of distributed servers. In one example, an event to be tracked is determined. A user associated with the event is identified. A script is generated to be embedded in a web page. The script triggers an event message when the user performs an online behavior related to the web page in accordance with the event. The event message triggered by the script is received. A tracing flag is determined from the event message. An instruction is provided to the plurality of distributed servers for executing one or more applications based on the event and the tracing flag.

Abstract: The present disclosure relates to methods and communication apparatus for providing a network slice. In one example method where an access network device accessed by a terminal device does not support a network slice requested by the terminal device, the terminal device sends a network slice identifier, corresponding to a protocol data unit (PDU) session, to the access network device by including the network slice identifier in an radio resource control (RRC) message. The access network device may learn of the network slice identifier, and when the access network device does not support the network slice, search, in an access network device corresponding to a neighboring cell, for a target second access network device that supports the network slice.

Abstract: A communication method and a communication apparatus are provided to send, to a terminal device by using an RRC message, information about at least one first network slice corresponding to a first identifier. The method includes: a first access network device broadcasts a first identifier, where the first identifier identifies information about a first access network slice; and the first access network device sends a radio resource control RRC message to a terminal device, where the RRC message includes information about at least one first network slice corresponding to the first identifier.

Abstract: This application discloses a communication system including a master base station and a secondary base station, both connecting with a terminal. In the communication system, the master base station sends a first message to the secondary base station for allocating transmission resources for one or more flows to be transmitted between the secondary base station and a terminal, wherein the first message carries one or both of: identification information of each flow to be transmitted, and information of a data radio bearer (DRB) associated with each flow to be transmitted, then the secondary base station may determine a mapping relationship between a DRB and an admitted flow according to the first message. Moreover, the master base station sends DRB configuration information to the terminal. Therefore, requirements of 5G communication systems for QoS management of information transmission in a dual connectivity scenario can be met.

Abstract: A key management method and a communication apparatus is disclosed. The method includes receiving, by a first radio access network (RAN) device, a key parameter and an identifier of a target terminal device sent by a first terminal device, performing at least one of encryption or decryption on transmission data related to communication between the first terminal device and the target terminal device based on the key parameter, and sending, by the first RAN device, the key parameter and an identifier of the first terminal device to the target terminal device.

Abstract: Example data security processing methods and apparatus are described. One example method includes setting up a first PDU session. A first base station derives a first user plane key based on a received base key and performs security processing on user plane data in the first PDU session by using the first user plane key and a security algorithm. A second PDU session is set up. The first base station derives a second user plane key based on the base key and performs security processing on user plane data in the second PDU session by using the second user plane key and the security algorithm. The user plane key includes a user plane encryption key and/or a user plane integrity protection key.

Abstract: A radio access network RAN device receives a first message, where the first message includes identifiers of one or more first network slices, and the identifiers of the one or more first network slices are the same as identifiers that are of the one or more first network slices and that are included in a non-access stratum NAS request message sent by a terminal device to a core network CN device by using the RAN device; and the RAN device sends a second message including network slice redirection information to the terminal device, where the network slice redirection information includes at least one of network slice remapping information and terminal device redirection information, and the network slice redirection information is obtained after the RAN device performs network slice redirection decision-making on the one or more first network slices.

Abstract: Embodiments of this application provide a duplication mode communication processing method in a central unit-distributed unit (CU-DU) architecture. In a possible implementation, in a process of establishing a user plane tunnel between a CU and a DU by exchanging information about uplink tunnel endpoints and information about downlink tunnel endpoints, the DU provides an identity of a primary path to the CU, thereby implementing a duplication mode of a data radio bearer.