Abstract: This application provides a communication method and a communication apparatus. The communication method includes: An access network device receives first configuration information, where the first configuration information indicates a terminal device to perform application layer quality of experience QoE measurement; the access network device generates second configuration information, where the second configuration information indicates the terminal device to report measurement result of at least one measurement metric obtained through the QoE measurement; and the access network device sends the first configuration information and the second configuration information to the terminal device.

Abstract: A terminal device generates a report result including at least one of a logged minimization of drive tests report, an RLF report, and an RACH report. The logged minimization of drive tests report includes an identifier of a candidate access cell, information indicating whether the candidate access cell supports a network slice service initiated by the terminal device, location information of the terminal device where the terminal device receives a system message of the candidate access cell, and a network slice identifier of the network slice service initiated by the terminal device. The RLF report includes an identifier of a cell in which a radio link failure occurs after the terminal device accesses the cell and the network slice identifier corresponding to the network slice service in which the radio link failure occurs on the terminal device. The RACH report includes an identifier of a cell accessed by the terminal device and the network slice identifier.

Abstract: Embodiments of this application disclose an information transmission method. The method in embodiments of this application includes: A core network device receives indication information and delay information, and the core network device may determine, based on the indication information, whether the delay information includes a terminal side delay or whether the terminal device supports measurement of the terminal side delay.

Abstract: In a measurement method, a terminal device receives a first measurement configuration from a first network element, where the first measurement configuration indicates that the terminal device is to measure a first cell corresponding to a first frequency. The terminal device then sends a measurement report to the first network element, where the measurement report includes a first measurement result of measuring the first cell and a second measurement result of measuring a second cell corresponding to a second frequency, and the second frequency is at least one non-serving frequency different from the first frequency.

Abstract: Various embodiments provide a resource allocation method and an apparatus. In those embodiments, a terminal device obtains a first parameter indicating a maximum service data volume to be provided by an access network device for a first service in a first time length; and determines, based on the maximum service data volume, a resource of a media access control protocol data unit MAC PDU, the resource being occupied by buffered data of the first service. In those embodiments, the terminal device determines, based on the maximum service data volume of the first service, the resource of the MAC PDU. Compared with a conventional method, the maximum service data volume of the first service is considered. This helps improve reasonableness of allocating the resource of the MAC PDU to the data of the first service.

Abstract: A method includes receiving a first message from a first master node. The first message includes an identifier of a first candidate primary secondary cell (PSCell) or an identifier of first configuration information of the first candidate PSCell. The first candidate PSCell is included in both a first PSCell list and a second PSCell list. Alternatively, the first message includes delta configuration information of a second candidate PSCell in the second PSCell list. The first configuration information of the first candidate PSCell includes an addition/change condition and a configuration of the first candidate PSCell. The first PSCell list includes one or more candidate PSCells configured by the first master node for a terminal. The second PSCell list includes one or more candidate PSCells configured by a second master node for the terminal. The method also includes adding a target PSCell or changing from an original PSCell to the target PSCell.

Abstract: A communication method and an apparatus are provided in embodiments of this application. When a cell served by a DU of an access network device and a neighboring cell use different timing, the DU may obtain timing configurations of a first cell and a second cell, or a RACH configuration that is of a second cell and that is based on timing of a first cell. When the method is applied to a RACH optimization scenario, the DU may determine, at same timing, RACH configurations of the two cells based on the foregoing obtained information, to accurately identify whether a RACH configuration conflict occurs between the cell and the neighboring cell, optimize the RACH configuration of the cell when the conflict occurs, and ensure a success rate and an access latency of random access performed by a terminal device.

Abstract: This application provides a method and an apparatus for configuring minimization of drive-tests MDT. The method for configuring MDT includes: A terminal device receives first MDT measurement configuration information and first indication information from a first network device. The terminal device learns, based on the first indication information, whether a type of first MDT configured by the first network device for the terminal device is signaling based MDT or management based MDT. Further, after establishing a connection to a second network device, the terminal device sends second indication information to the second network device, and reports the type of the first MDT that has been configured for the terminal device. The management based MDT overwrites signaling based MDT previously configured by the first network device for the terminal device can be avoided, thereby increasing a possibility that the management based MDT does not overwrite the configured signaling based MDT.

Abstract: A communication method and apparatus are provided, to resolve a problem that a terminal device may fail to normally communicate with a network side when an SCG is suspended and a link problem occurs in an MCG or a signal quality of the MCG deteriorates, so that communication reliability is improved. The communication method and the apparatus are applicable to a communication system of any dual connectivity architecture, such as EN-DC, NGEN-DC, NE-DC and NR-DC. The method includes: When detecting that a link problem occurs in an MCG or signal quality of the MCG is less than a signal quality threshold, a terminal device resumes a suspended SCG, to resume communication between the terminal device and a network side. The MCG is managed by a master node, and the SCG is managed by a secondary node.

Abstract: Example communications systems, methods and network devices are described. One example method includes sending a first message by a first access network device to a core network device to enable the core network device to send a second message to a second access network device, where the first message includes an identity of the second network device. The first message is used to request for X2 transport network layer (TNL) configuration information of a third network device, and the third network device is a network device that has established an X2 connection to the second network device. The first network device receives the X2 TNL configuration information of the third access network device from the second access network device. Therefore, a network device connected to a control plane of a core network can obtain TNL addresses of more network devices that are not connected to the control plane of the core network.

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 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: The present disclosure relates to communication methods and communication apparatus. In one example method, a centralized unit user plane (CU-UP) obtains a first service feature of a service. The first service feature includes one or more of the following: data that indicates whether the service is a periodic service, a periodicity corresponding to the service when the service is a periodic service, a service packet size corresponding to the service, a service model corresponding to the service, or scheduling time of the service. Then, the CU-UP sends the first service feature to a centralized unit control plane (CU-CP). Next, the CU-CP may send the first service feature to a distributed unit (DU).

Abstract: A communication method, a terminal device, and a network device are disclosed. The communication method includes: A first terminal device receives second configuration information, where the second configuration information is used to obtain first information used for direct communication between the first terminal device and a second terminal device, and the first information includes at least one of the following: a service sending latency, a service sending throughput, a service receiving throughput, a sent service data amount, a received service data amount, a service data packet loss rate, or control information between the first terminal device and the second terminal device; the first terminal device obtains the first information; and the first terminal device sends the first information to a network device. The foregoing method increases an amount of information obtained from a direct communication system.

Abstract: Example handover methods and apparatus are described. One example method includes generating a handover request message or a handover requirement message by a source radio access network (RAN) device. The handover request message includes a first mapping relationship between downlink transmission of a quality of service (QoS) flow and a data radio bearer (DRB) and a second mapping relationship between uplink transmission of the QoS flow and a DRB that are configured by the source RAN device for a terminal device, where the two mapping relationships are different. The source RAN device sends the handover request message to a target RAN device, and forwards data of the terminal device on the source RAN device to the target RAN device in a process in which the terminal device is handed over from the source RAN device to the target RAN device.

Abstract: A communication method, apparatus, and system, the method including receiving first indication information from a first network device, where the first indication information is requests a terminal device to report first information, and reporting the first information to the first network device, where the first information includes related information in a conditional handover procedure.

Abstract: A method, including sending, by a first network device, to a second network device, a first message requesting a context of a terminal device from the second network device, and receiving, by the first network device, a second message from the second network device, where the second message comprises first mobility history information and second mobility history information, where the first mobility history information is recorded by the terminal device, where the second mobility history information is recorded by a network device, and where the second message is a response message of the first message.

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: A mobility optimization method and a related apparatus are provided. The method includes: determining connection failure information; and sending the connection failure information and an identifier of a first cell to a first network device by using a radio resource control (RRC) message, wherein the identifier of the first cell comprises an identifier of a cell from which a reconfiguration message or a handover command message received by the terminal device comes or an identifier of a cell in which a connection failure occurs, wherein the connection failure information is in a form of a container in the RRC message and the identifier of the first cell is outside the container.

Abstract: A communication method and apparatus, the method including performing, by a terminal device or a chip of the terminal device, sending a master cell group (MCG) failure message to a master node (MN) via a secondary node (SN) in response to detecting that a wireless connection fails, and further in response to a secondary cell group (SCG) not failing, performing cell selection in response to the SCG failing, and accessing a target cell in response to the target cell being a candidate cell pre-configured by the MN, where the target cell is a cell selected by the terminal device during the cell selection, where the SCG is a group of cells associated with the SN, and where the MCG is a group of cells associated with the MN.