Abstract: A random access method includes working, by a user equipment (UE), on a first bandwidth part (BWP), where the first BWP is a currently active BWP, when the UE needs to perform a random access procedure, the UE performs the random access procedure on an initial BWP or on the first BWP, and when the UE receives BWP switching indication information from a network device instructing the UE to use a second BWP when performing the random access procedure on the first BWP, continuing, by the UE, to perform the random access procedure on the first BWP, or stopping, by the UE, performing the random access procedure on the first BWP, and performing the random access procedure on the second BWP.

Abstract: The present disclosure relates to data transmission methods, network devices. One example data transmission method includes: a first network node sends a first indication information to a second network node, the first indication information includes information about an uplink data volume of a buffer of a terminal device, or the first indication information indicates a relationship between an uplink data volume of a buffer of a terminal device and a predefined data volume threshold.

Abstract: This application provides a communication method, a communication apparatus, and a terminal device. The method includes a first node that receives a first message of a terminal device that requests to associate the terminal device with the first node. The first node obtains information about a second node, where the second node is a group header of an upper layer group in which the terminal device is located. The first node performs data transmission as a relay between the terminal device and the second node. According to a solution provided in this application, the terminal device can perform normal communication.

Abstract: This application provides a reflective QoS flow characteristic-based communications method and apparatus. In the method, an access-network network element sends first information to a core-network network element, where the first information is used to indicate whether a data packet has a reflective QoS flow characteristic; and the access-network network element determines, based on the first information, whether there is a need to send a QoS flow identifier to a terminal. In this way, signaling overheads are reduced.

Abstract: This application provides a communications method and a communications apparatus, to reduce storage resources required by an access network device to store a context of a terminal device. The method includes: The access network device gathers terminal devices that have a same attribute in a group, where a context of each terminal device is divided into two parts: a common context and a dedicated context, the common context is shared by all the terminal devices in the group, and the dedicated context is a context specific to the terminal device. The access network device stores one common context for each group and stores a dedicated context of each terminal device in the group, to maintain the context of each terminal device.

Abstract: A notification regarding a transition of a User Equipment (UE) from a standby operating mode to an active operating mode is exchanged between a UE and a network element in a communication network. The notification could be an uplink notification that is transmitted by the UE to the network element in response to an operating mode transition criterion for the UE being met at the UE, or a downlink notification that is transmitted by the network element to the UE in response to an operating mode transition criterion for the UE being met at the network element. The UE transitions from the standby operating mode to the active operating mode in response to the operating mode transition criterion being satisfied. The transmitter of the notification, which could be the UE or the network element, could also perform grant-free transmission of data without first receiving a response to the notification.

Abstract: A communication method and apparatus, and a system. A first terminal device obtains first information, where the first information includes a first multicast and broadcast service MBS service identifier and first sidelink SL resource information. A mapping relationship exists between the first MBS service identifier and the first SL resource information. A first MBS is an MBS supported by a first relay terminal device, and the first SL resource information is usable for transmitting data of the first MB S to the first terminal device. The first terminal device receives, based on the first SL resource information, the data that is of the first MBS and that is sent by the first relay terminal device. The first terminal device transmits MBS data in a scenario in which a relay terminal device supports an MBS service.

Abstract: This application provides a communication method, apparatus, and system. The communication method includes: A first access network device (an indoor base station) obtains first information, and then sends the first information to a core network device through a control plane of a next generation (NG) interface or a general packet radio service tunnelling protocol for the user plane (GTP-U) tunnel between the first access network device and the core network device. The first information transmitted on the control plane of the NG interface or the GTP-U tunnel needs to pass through a route of a second access network device (an outdoor base station). According to this method, the indoor base station may perform NG interface-based communication with the core network device via the outdoor base station, to provide a better home network service.

Abstract: This application provides a relay communication method, an apparatus, and a system. The method includes: An access network device receives first information from a terminal device, where the first information includes an identifier of a first relay device; the access network device receives second information from a core network element, where the second information includes information of a relay device that the terminal device is allowed to access; and the access network device determines, based on the first information and the second information, whether the terminal device is allowed to access the first relay device.

Abstract: The embodiments of this application provide a communication method and an apparatus, and relate to the field of communications technologies, to successfully report MCG link failure information. The method includes: When a terminal device sends a first data unit to a first access network device via an MCG split bearer, the terminal device determines that an MCG link failure occurs. In addition, the terminal device sends a second data unit to a second access network device via an SCG split bearer, so that the second access network device sends the second data unit to the first access network device, where the second data unit includes information used to indicate the MCG link failure.

Abstract: This application provides a minimization of drive tests (MDT) measurement solution, which may be used to implement an MDT measurement of a network device with an architecture in which a central unit (CU) entity and a distributed unit (DU) entity are separated. A centralized unit control plane (CU-CP) determines configuration information, and sends the configuration information to a centralized unit user plane (CU-UP) of the network device. The configuration information is used to perform an MDT measurement on a measurement object. The solution in this application may be applied to a communications system, for example, may be applied to a 5th generation (5G) network.

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 provides a transmission method and a data transmission apparatus, so as to avoid out-of-order of data packets.

Abstract: The present disclosure relates to delay measurement methods and apparatus. In one example method, a first communications device receives a data unit from a second communications device, where the data unit includes time information, the time information is used to indicate a first moment at which the second communications device sends the data unit, and the time information indicates the first moment based on a part of bits of a frame number. The first communications device determines a delay from the second communications device to the first communications device based on the first moment and a second moment, where the second moment is a moment at which the first communications device receives the data unit.

Abstract: The technology of this application relates to an energy saving method and an apparatus. The method includes an AI device receives first data from a first network device and a second network device; the AI device performs an AI inference based on the first data to obtain an energy saving policy, and the AI device separately sends the energy saving policy to the first network device and the second network device. According to the method and the apparatus in embodiments of this application, accuracy and robustness of the energy saving policy can be improved, and in a scenario in which network traffic fluctuates, a quantity of times of frequently switching on or switching off a cell of the second network device can be reduced.

Abstract: Embodiments of this application provide a message identification method and apparatus. The method includes: receiving, by user equipment UE, a paging message sent by an access network device; determining, by the UE, a core network entity to which the paging message belongs in a plurality of core network entities serving the UE; and establishing, by the UE, a data connection to the core network entity to which the paging message belongs. According to the message identification method and apparatus provided in the embodiments of this application, the UE can connect to different core network entities.

Abstract: This application provides an information transmission method and an apparatus. A core network device obtains second public land mobile network (PLMN) information of a second cell before a cell handover of a terminal device. After the terminal device is handed over to a first cell, the core network device obtains first PLMN information of the first cell. When a second PLMN does not belong to a PLMN list and a first PLMN belongs to the PLMN list, the core network device sends first information to a first access network device corresponding to the first cell, where the first information includes the PLMN list, and the PLMN list includes a PLMN set that allows the terminal device to perform minimization of drive test.

Abstract: This application provides a communication method and a communication apparatus. The method includes: A first network entity obtains first information, where the first information includes any one of the following: signal measurement results of a terminal device in at least two cells, and a relationship of the signal measurement results of the terminal device in the at least two cells, where the at least two cells include a first cell and a second cell; and the first network entity determines, based on second information, an adjustment manner for adjusting transmit power of the first cell. According to this application, even if signal quality of the first cell cannot be accurately measured, the adjustment manner for adjusting the transmit power of the first cell can be determined.

Abstract: A communication method is described that includes a terminal device receiving a first message sent by a network device to which the terminal device expects to be handed over, and the first message indicates at least one target manner of the air interface technology determined by the network device from at least one optional manner of the air interface technology. Thereafter, the terminal device communicates with the network device by using the at least one target manner of the air interface technology.

Abstract: This application provides a measurement configuration method and an apparatus. The method includes: determining that a serving cell changes from a first cell to a second cell; and updating or deleting a current measurement window configuration. The measurement window configuration is used to indicate a time domain position at which a terminal device measures a downlink reference signal. According to the solution provided in this application, when the serving cell of the terminal device changes, the current measurement window configuration of the terminal device is updated or deleted, so that a problem that the measurement window configuration of the terminal device is not applicable to measurement can be resolved to some extent.