Abstract: This application provides a unicast communication method and apparatus. The method includes: A first relay device receives a first message sent by a first terminal device, where the first message includes a first identifier of a second terminal device. The first relay device sends a second message to the second terminal device when transmission quality of the first message meets a first preset condition, where the second message is for establishing a first unicast connection, and the first unicast connection is a unicast connection established between the first terminal device and the second terminal device through the first relay device. According to the unicast communication method provided in this application, an appropriate relay device is selected in a unicast connection establishment process. This helps improve a success rate of the unicast connection and communication quality of unicast communication.

Abstract: Embodiments of this application provide a communication method and apparatus. The method includes: A first terminal performs integrity protection verification on a received RRC message; and when the integrity protection verification fails, an RRC layer of the first terminal sends a first indication and an identifier of a second terminal to an application layer of the first terminal, where the first indication and the identifier of the second terminal are used by the application layer to disconnect a unicast connection between the first terminal and the second terminal. Based on this solution, when the integrity protection verification performed by the first terminal on the received message fails, the RRC layer of the first terminal may report the first indication and the identifier of the second terminal to the application layer, to trigger the application layer to disconnect the unicast connection between the first terminal and the second terminal.

Abstract: A communication method and apparatus. A first network element sends, to a second network element, N groups of QoS profiles corresponding to a first QoS flow, and then receives first indication information from the second network element, where the first indication information indicates one of the N groups of QoS profiles selected by the second network element for the first QoS flow. The first network element sends second indication information to a third network element, where the second indication information indicates the one of the N groups of QoS profiles selected for the first QoS flow.

Abstract: Embodiments of this application disclose a communication method and a communications apparatus, to resolve a problem that a terminal cannot quickly resume a communication connection to a secondary node. The method includes: receiving, by a first master node, a first message from a terminal, where the first message is used to request state transition of the terminal from a third mode to a connected mode; determining, by the first master node, a secondary node that serves the terminal; obtaining, by the first master node, a first security parameter, where the first security parameter is used to derive a security key used for communication between the terminal and the secondary node that serves the terminal; obtaining, by the first master node, SCG configuration information; and sending, by the first master node, a second message to the terminal, where the second message includes the first security parameter and the SCG configuration information.

Abstract: A communication method and an apparatus. The method includes: receiving at least one piece of quality of service QoS information from a second terminal; determining first QoS information based on the at least one piece of QoS information; and determining a first bearer configuration based on the first QoS information, and forwarding data from the second terminal to a third terminal based on the first bearer configuration; or sending the first QoS information to a network device, receiving a first bearer configuration of the network device, and forwarding data from the second terminal to a third terminal based on the first bearer configuration.

Abstract: Embodiments of this application provide a communication method and a related device. The method includes: a network device firstly sends the configuration information to the user equipment, and then the user equipment obtains a first condition based on the configuration information. Then, in a measurement process, the user equipment sends a measurement report to the network device when determining that the first condition is currently met. After obtaining the measurement report, the network device indicates at least one candidate relay device to the user equipment by using a path switch command. The user equipment determines one relay device in the at least one candidate relay device, and communicates with the network device or another network device through the determined relay device.

Abstract: A wireless communication method includes receiving, by a terminal device, first information sent by a network device. The first information includes a first offset. The first offset is a difference between a frame number of a first system frame and a frame number of a first direct frame. The first system frame and the first direct frame overlap in a time domain. The wireless communication method also includes determining, by the terminal device, the first direct frame based on at least one of the first offset or the frame number of the first system frame.

Abstract: In an embodiment a sidelink communication method includes when a hybrid automatic repeat request (HARQ) feedback attribute of at least one sidelink logical channel of a first terminal device is enabled, obtaining, by the first terminal device from a network side device, one or more resource pools for the first terminal device, wherein a physical sidelink feedback channel (PSFCH) resource is configured in at least one of the resource pools.

Abstract: Embodiments of this application disclose a communication method and a related apparatus, so that remote UE can communicate with a network via relay UE that resumes or establishes a radio resource control RRC connection, to ensure communication quality of the remote UE. The method includes: A first access network device receives a first message sent by first UE, where the first message includes a first identifier of second UE, and the first identifier is an identifier of the second UE in an RRC inactive state or an RRC idle state. The first access network device pages the second UE based on the first message. The first access network device sends a second message to the first UE, where the second message indicates the first UE to perform path switching, the second message includes a second identifier of the second UE.

Abstract: This application provides failure processing methods, handover methods, terminal devices, and network devices. One method includes receiving a radio resource control (RRC) configuration of a secondary network device, if the RRC configuration of the secondary network device is from the secondary network device and the RRC configuration fails, sending, to a primary network device, first indication information for indicating a configuration failure of the RRC configuration.

Abstract: A communication method includes a first terminal device that determines first configuration information of first discontinuous reception DRX, where the first DRX controls the first terminal device to receive data on a sidelink. The first terminal device sends the first configuration information to a second terminal device, where the second terminal device is a terminal device that establishes a sidelink connection to the first terminal device. This can reduce power consumption of the terminal device.

Abstract: A method includes: a first terminal device receives first information from a network device, where the first information includes an indication information of a first unicast connection and a reference signal configuration corresponding to the first unicast connection, the reference signal configuration is used by the first terminal device to send a reference signal to a second terminal device; and the first terminal device sends the reference signal to the second terminal device on a sidelink based on the reference signal configuration.

Abstract: A communication method, a device, and a system, the method including sending, by a terminal device that supports a first user identity and a second user identity, first information to a first access network device using the first user identity, the first access network device being an access network device to which a first cell belongs, where the first cell is a primary cell in which the terminal device communicates with the first access network device by using the first user identity, where the second cell is a cell on which the terminal device camps using the second user identity, and the first indication information indicates that the first user identity and the second user identity that are supported by the terminal device share capabilities of the terminal device, and receiving first configuration information from the first access network device using the first user identity.

Abstract: This application provides an inter-system handover method and a communication apparatus, and may be applied to an inter-system handover scenario. In a handover process, a source access network device may provide a target access network device with an identity of a terminal device. When determining to add the source access network device as a secondary access network device, the target access network device may send, to the source access network device, a request message for adding a secondary access network device that carries the identity of the terminal device.

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: This application provides a communication method and apparatus, and relate to the communication field, so that an inter-node negotiation process between an MN and an SN can be completed when the MN uses a CU-DU architecture in DC communication. The method includes: A DU receives a first request message from a CU, where the first request message requests the DU to determine configuration information of an MN, and the configuration information of the MN is used to assist an SN in determining configuration information used for a terminal device; and the DU sends a first response message to the CU, where the first response message includes the configuration information of the MN. Embodiments of this application are applied to a DC scenario.

Abstract: Example configuration methods and apparatus are described. An example communications system includes a master node and a secondary node that jointly provide a service for a terminal. One example method includes generating configuration information for a signaling radio bearer (SRB) by the secondary node, where the SRB is used to transmit a radio resource control (RRC) message between the secondary node and the terminal. The secondary node sends the configuration information for the SRB to the master node, so that the configuration information for the SRB is sent to the terminal through the master node. The secondary node receives a result of configuring the SRB by the terminal by using the configuration information for the SRB. In this way, the SRB can be established on the secondary node, and used for RRC message transmission between the secondary node and the terminal.

Abstract: This application provides a communication method, a network device, and a terminal. The communication method includes: determining, by a first network device, at least one candidate target cell and first configuration information, where the first configuration information is used to trigger a terminal to determine one of the at least one candidate target cell as a to-be-handed-over-to cell; and sending, by the first network device, a first message to the terminal, where the first message includes first cell indication information and the first configuration information, and the first cell indication information is used to indicate the at least one candidate target cell.

Abstract: This application provides an uncrewed aerial vehicle control method, an apparatus, and a system. An uncrewed aerial vehicle or a network device identifies a risk of a flight path, to manage the flight path of the uncrewed aerial vehicle, thereby ensuring flight safety of the uncrewed aerial vehicle.

Abstract: Embodiments of this application relate to the field of communications technologies, and disclose communications methods and apparatuses. In an implementation, a method comprising receiving, by a first communications device, information about a radio bearer (RB) of a heterogeneous communications system, wherein a duplication operation for the RB is configured by a second communications device, and the first communications device and the second communications are comprised in a master node or a secondary node; generating, by the first communications device, an activation indication indicating whether to activate or deactivate the duplication operation of the RB, wherein whether to activate or deactivate the duplication operation is determined by the first communications device; and sending the activation indication to a terminal device.