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 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 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: 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: 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.

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.

Abstract: Example communication methods and apparatus are described. A network device sends first information to a first communication apparatus. The first information indicates a correspondence between a first data radio bearer and a second data radio bearer, the first data radio bearer is a data radio bearer between the network device and the first communication apparatus, and the second data radio bearer is a data radio bearer between the first communication apparatus and a second communication apparatus. Second information is sent by the network device to the second communication apparatus, where the second information indicates a correspondence between a first packet data convergence protocol (PDCP) entity of an universal user to network interface (Uu interface) of the second communication apparatus and a first radio link control (RLC) entity of an sidelink (SL) interface of the second communication apparatus, and the first RLC entity corresponds to the second data radio bearer.

Abstract: This application discloses a communication method, including: a terminal obtains a current flight parameter, and determines a target conditional handover configuration from a candidate conditional handover configuration group based on the current flight parameter, where the target conditional handover configuration is used to determine a second cell that the terminal expects to access. In this process, because the candidate conditional handover configuration group generated by the access network device to which a first cell belongs corresponds to the flight-related parameter, the terminal obtains the target conditional handover configuration in the candidate conditional handover configuration group based on a matching result between the current flight parameter and the flight-related parameter. In this way, accuracy of obtaining the target conditional handover configuration is improved, and efficiency of handover to the second cell is improved.

Abstract: Embodiments of this application provide example communication methods, apparatuses, and systems. One example method includes receiving, by a first terminal device, a first message from a second terminal device. The first message is determined to be a discovery message by the first terminal device based on a first resource for transmitting the first message, where the first resource is a resource specially used to transmit the discovery message, and the discovery message indicates that the second terminal device is a relay terminal device.

Abstract: This application provides a failure processing method, a handover method, a terminal device, and a network device, to provide a manner in which a terminal receives an RRC configuration of a secondary network device and feeds back an RRC configuration failure. The method includes: directly receiving, by a terminal device, a first RRC configuration of a secondary network device from the secondary network device; and when the first RRC configuration fails, sending, by the terminal device, first indication information to a primary network device to indicate that the first RRC configuration fails. In addition, when the first RRC configuration fails, the terminal reports one piece of first indication information to the primary network device to indicate that the first RRC configuration fails.

Abstract: This application provides a communication method and apparatus, and relates to the field of communication technologies. The method includes: a relay terminal detects that a link fault occurs on a first link, wherein the first link is a link between the relay terminal and a remote terminal; and the relay terminal sends first notification information to the access network device, wherein the first notification information is for notifying the access network device that a link fault occurs on the first link.

Abstract: The present disclosure relates to sidelink communication methods and apparatus. In one example method, a terminal device sends first information to a network device, where the first information includes a first destination address, a first carrier index, and a first quality of service (QoS) parameter, and there is a correspondence between the first destination address, the first carrier index, and the first QoS parameter. The network device receives the first information from the terminal device. The network device determines sidelink radio bearer (SLRB) configuration information based on the first information, and sends the SLRB configuration information to the terminal device. The terminal device receives the SLRB configuration information from the network device.

Abstract: A communication method and an apparatus. A terminal device determines height information, where a first parameter is related to the height information. The terminal device receives configuration information from a first network device, where the configuration information includes a correspondence between the height information and the first parameter. The terminal device determines, based on the height information, the first parameter corresponding to the terminal device. The first parameter includes one or more of a tracking area parameter, a radio access network notification area parameter, a cell selection or reselection parameter, and a measurement configuration parameter. Configuration information corresponding to a height of an uncrewed aerial vehicle is provided, to ensure that an uncrewed aerial vehicle terminal device at a high height obtains an effective configuration parameter, so that user experiences at different heights is improved.

Abstract: A method for processing radio link failure (RLF) information includes obtaining sidelink (SL) RLF information of an SL on which an RLF occurs and a terminal device is in an idle state or an inactive state. The further includes determining that the terminal device is in a connected state, and sending the SL RLF information to a network 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.