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.

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 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 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: 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 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: 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 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: 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 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 transmission method includes: a terminal device receives an uplink grant from a base station; and the terminal device sends a report to the base station, where the report includes a power headroom of each of at least one uplink subcarrier, and/or a power headroom of each of at least one bandwidth part. According to the uplink data transmission method, the terminal device, and the base station in embodiments of this disclosure, a power headroom can be reported at a finer granularity.

Abstract: Embodiments of this application provide a communication processing method of terminal information. In an embodiment, a method comprises: sending, by a first access network device, a secondary base station addition request to a second access network device, wherein the secondary base station addition request comprises software version information of a terminal device; and receiving, by the first access network device, a secondary base station addition acknowledgement from the second access network device to implement dual connectivity, wherein the secondary base station addition acknowledgement comprises a configuration determined based on the software version information.

Abstract: An example communication method includes that a first terminal device receives through a first path a first data packet from a second terminal device. The first terminal device receives through a second path a second data packet from a second terminal device, where the first path has a mapping relationship with the second path. The first terminal device transmits, based on the mapping relationship, the first data packet and the second data packet to a same aggregation protocol layer entity to perform data aggregation processing.

Abstract: Example configuration methods and apparatus are described with reference to an example communications system. The example communications system includes a master node and a secondary node that jointly provide a service for a terminal. One example method includes that the secondary node generates configuration information for a signaling radio bearer (SRB), 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: A communication method and a communication apparatus, the method including receiving first information from a network device, where the first information indicates, to a terminal device, to suspend a secondary cell group (SCG), suspending the SCG based on the first information, and changing a configuration parameter of a master cell group (MCG), where the configuration parameter comprises at least one of an available uplink transmission time period, a maximum transmit power, or a control channel blind detection parameter.

Abstract: Embodiments of this application disclose a session establishment method, a data transmission method, and a related apparatus. A first device receives a first message sent by a second device. The first device establishes a first session with a third device based on the first message. The first message carries a first identifier and a second identifier, and the second identifier indicates information about a group to which the first identifier belongs. A fourth device is determined based on the second identifier. This improves fourth device determining efficiency, thereby improving data transmission efficiency.

Abstract: Example communication methods and apparatus are described. One example communication method includes receiving indication information by a terminal device from a network device, where the indication information is used to indicate resource configuration information of a first uplink carrier and/or a second uplink carrier. The first uplink carrier and the second uplink carrier are different uplink carriers in a cell of the network device, and the first uplink carrier and the second uplink carrier are corresponding to one downlink carrier in the cell. The terminal device determines one uplink carrier from the at least one uplink carrier as a target carrier for performing random access based on the resource configuration information of the at least one uplink carrier.

Abstract: This application provides a communication method and apparatus, to help resolve a paging conflict problem in a terminal device that supports a plurality of subscriber identity modules. The method includes: A terminal device sends, to a network side device, information indicating that a first user identity of the terminal device and a second user identity of the terminal device are associated with the terminal device; and the terminal device receives, by using the first user identity, paging information corresponding to the second user identity of the terminal device. In the method, the terminal device receives a paging-related message or paging-related information in a cell corresponding to a single user identity, to monitor paging information of a plurality of user identities of the terminal device, so that the plurality of user identities of the terminal device can be effectively paged.