Abstract: This application provides a communication method, apparatus, and system. The method includes: determining first information, where the first information includes one or more types of information about an associated beam for a random access success of the terminal device, or, information about an associated uplink carrier for a random access success of the terminal device, and/or includes information about a random access channel RACH resource for a random access failure of the terminal device, and the random access failure of the terminal device includes one or more of a 2-step random access failure, a 4-step random access failure, a dedicated RACH resource random access failure, or a common RACH resource random access failure; and sending the first information.

Abstract: A load balancing method which includes a first radio access network node that receives load information of a first load type of a second radio access network node, where the first load type includes any one or more of the following: a network slice load, V2X load, and SUL load; and the first radio access network node obtains the load information of the first load type, so that load balancing can be performed based on a load status of a network slice, a load status of a V2X service, or a load status of a UL/SUL.

Abstract: This application discloses a physical random access channel (PRACH) resource processing method and an apparatus, to resolve a PRACH resource interference problem in a new radio NR system. The method in embodiments of this application includes: receiving, by a first access device, first information from a second access device, where the first information includes at least one of PRACH resource information of beam failure recovery (BFR), PRACH resource information of on-demand system information (OSI), and PRACH resource information of an uplink (UL) carrier; and performing, by the first access device, processing based on the first information.

Abstract: An information transmission method includes: A terminal device sends first information to a network device, where the first information includes information indicating that a radio link failure occurs between the terminal device and a first cell, or the first information includes information indicating that beam failure recovery occurs between the terminal device and the first cell; and the first information further includes information about a resource; and the network device performs mobility robustness optimization based on the first information.

Abstract: A method for sending a synchronization signal in a relay system, and the method includes receiving, by a relay node, synchronization signal information sent by a parent node through an air interface, where the synchronization signal information comprises at least one of a subcarrier spacing of a synchronization signal, information about an operating frequency band of the relay node, information about a physical broadcast channel of the relay node, a synchronization signal periodicity, or indication information of a synchronization signal obtaining manner, and sending, by the relay node, the synchronization signal based on the synchronization signal information.

Abstract: Example multi-connectivity communication methods and apparatus are described. In one example method, an access network device of a first network determines to use an access network device of a second network to perform data splitting for data of UE. Then, the access network device of the first network sends first splitting configuration information to the UE and sends second splitting configuration information to the access network device of the second network. The first splitting configuration information is used to notify the UE that the access network device of the second network is to split to-be-split data of the UE. The second splitting configuration information is used to instruct the access network device of the second network to split the to-be-split data of the UE.

Abstract: Embodiments of this application provide a data transmission method and a corresponding apparatus. The method includes obtaining, by a second terminal, first information, wherein the first information indicates a correspondence between a downlink quality of service (QoS) flow and a downlink device-to-device (D2D) bearer; and sending, by the second terminal to a first terminal based on the correspondence, a downlink data packet on the downlink D2D bearer corresponding to the downlink QoS flow, wherein the downlink data packet is carried on the downlink QoS flow.

Abstract: This application discloses communications methods, apparatuses, and systems. In one implementation, a method includes: performing a function of a control-plane protocol layer, wherein the control-plane protocol layer comprises a first protocol layer of the network node corresponding to a first protocol layer of a relay node, the first protocol layer is on an interface between the network node and the relay node, and the network node is a donor base station or a centralized unit of a donor base station; and sending, from the first protocol layer of the network node, a first message to the first protocol layer of the relay node, wherein the first protocol layer of the network node and the first protocol layer of the relay node are F1 application protocol layers, and the first message is a F1AP message that comprises one or more of context management information of a terminal device served by the relay node or a radio resource control message of the terminal device.

Abstract: A minimization of drive tests (MDT) method and apparatus includes: a network device sends MDT configuration information to a terminal, where the MDT configuration information includes an MDT measurement parameter of a shared spectrum; and the terminal performs MDT on the shared spectrum based on the MDT configuration information to obtain a measurement report, and sends the measurement report to the network device. The MDT may be performed on a shared spectrum to obtain a measurement report. The measurement report may better reflect an application status of the shared spectrum, to help optimize a network device that performs communication by using the shared spectrum.

Abstract: Embodiments of this application provide a communication method, apparatus, and system. The method includes a network management entity determines a dual connectivity attribute of a first neighbor cell of a first cell, where the dual connectivity attribute is used to indicate whether the first neighbor cell can be used as a secondary cell of the first cell, the first cell belongs to a first base station, and the first neighbor cell belongs to a second base station; and the network management entity sends configuration information to the first base station, where the configuration information indicates the first base station to configure the dual connectivity attribute of the first neighbor cell.

Abstract: This application provides a communication method and apparatus. In an example method, when a first access network device performs unsuccessful listen before talk (LBT) for channel detection on an unlicensed channel, the first access network device sends first indication information to a second access network device. The first indication information indicates that the first access network device performs unsuccessful LBT for channel detection on the unlicensed channel.

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: 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: This application provides a communication method and a communication apparatus, to implement transmission of a cell coverage state indicator in a centralized unit-distributed unit (CU-DU) split architecture, which improves network performance. The communication method includes: A distributed unit DU of a first network device determines a first coverage indicator. The DU of the first network device sends the first coverage indicator and a first identifier to a centralized unit CU of the first network device, where the first coverage indicator includes one or more of the following: a cell coverage state of a first cell, a cell deployment status indicator of the first cell, and cell replacing info of the first cell, and the first identifier is used to identify the first cell.

Abstract: Example information transmission methods and apparatus are described. One example method includes determining first information by a relay node, where the first information includes at least one of the following information: a buffer status at a granularity of the relay node, a buffer status at a granularity of an RB between the relay node and at least one first node, a buffer status at a granularity of each first node in the at least one first node, and a buffer status at a granularity of an RB between each first node in the at least one first node and a child node, where the at least one first node is a child node of the relay node. A first packet that carries the first information is sent by the relay node to a second node.

Abstract: Embodiments of the present disclosure provide a multi-connectivity communication method and a device. An access network device of an LTE network sets up a second connection for UE and splits data of the UE through the second connection. The second connection is a connection set up between the UE and the access network device of the LTE network through an access network device of a next generation network. Therefore, dual connectivity between the UE and the LTE network and the next generation network is implemented, a data transmission rate of the UE is increased, and a throughput of the entire network can be increased.

Abstract: A communications system, a core network device and a non-transitory machine-readable medium are provided. In the communications system, a master base station gather traffic statistics information on a service of a user terminal which is transmitted between the user terminal and the master base station through a secondary base station, and sends a message to a core network device. The message includes the traffic statistic information for calculating a charge on the service by the core network device.

Abstract: A link failure report transmission method and apparatus are provided. When a link between a terminal and a first radio access network device fails, and a master radio access network device of the first radio access network device is handed over, the terminal sends a first link failure report to a second radio access network device, so that the second radio access network device forwards the first link failure report to a third radio access network device, and the third radio access network device sends the first link failure report to the first radio access network device. In this way, the first radio access network device can perform parameter adjustment based on the first link failure report.

Abstract: Embodiments of this application disclose a data transmission method and a related device. The method includes: A first network device receives first indication information from a second network device, where the first indication information is used to indicate that a terminal device is successfully handed over from a third network device to the first network device or that the third network device has released a context of the terminal device; and the first network device detects a mobility problem based on the first indication information. According to the method provided in the embodiments of this application, a target SN may detect a mobility problem based on indication information sent by an MN.

Abstract: A history information recording method, including obtaining, by a current secondary node, information about a history cell that a terminal device visits, where the information about the history cell comprises at least one of stay time of the terminal device in the history or moving speed information of the terminal device in the history cell, and performing, by the current secondary node, handover preparation based on the information about the history cell.