Abstract: A communication method is provided. A first network element receives an association identifier of a first application from a session management network element, where the association identifier is for associating different quality of service QoS flows of the first application. The first network element performs joint scheduling on the plurality of QoS flows of the first application that each carry the association identifier. Based on this solution, the first network element can identify, based on the association identifier, QoS flows belonging to a same application, and perform joint scheduling, thereby ensuring that the QoS flows of the same application can arrive at a terminal device simultaneously or a time interval between arrivals at the terminal device is small, so that the service experience of a user can be improved.

Abstract: This application discloses a protocol data unit set–based communication method and a related apparatus. The method includes: An access network device receives first information, where the first information is used to enable the access network device to determine a retransmission mechanism of one or more PDU sets; and the access network device disables retransmission of a part or all of data packets of a first PDU set based on the first information, where the first PDU set belongs to the one or more PDU sets. The access network device determines a retransmission mechanism of a data packet of a PDU set based on an external indication. Retransmission of the part or all of the data packets of the first PDU set is disabled, so that a delay can be reduced, network resource occupation can be reduced, and a data throughput can be improved.

Abstract: Embodiments of this application provide for a service data flow transmission method, a communication apparatus, and a communication system. In the method, a network device obtains, from one or more received data packets, an identifier of a first data packet group, information indicating generation time of the first data packet group, and downlink transmission time window information of the first data packet group. Also in the method, the network device sends a data packet in the first data packet group to an access network device. At least one data packet in the first data packet group is sent together with the identifier of the first data packet group, the information indicating the generation time of the first data packet group, and the downlink transmission time window information of the first data packet group.

Abstract: This application provides a data transmission method and an apparatus. In the method, a first data unit is received from a server or a data network, wherein the first data unit comprises first identification information and second identification information, a target transmission requirement corresponding to the first data unit is obtained based on the first identification information, protocol data encapsulation is performed on the first data unit based on the target transmission requirement, to obtain a second data unit that comprises third identification information related to the second identification information; and the second data unit is sent to an access network device.

Abstract: The present disclosure relates to positioning request processing methods, devices, and systems. In one example method, a mobility management network element receives a request message, and sends a first message to a location management network element based on the request message, where the first message is used to trigger the location management network element to obtain location information of a first terminal device through user plane positioning. After receiving the first message, the location management network element sends a second message to the first terminal device based on the first message by using a PDU session of the first terminal device, where the second message indicates the first terminal device to report positioning data.

Abstract: This application relates to the field of communication technologies, and provides a communication method and apparatus, to improve transmission performance of a communication network. In the method, a first QoS flow corresponding to a plurality of QoS parameter sets is provided. In a transmission process, a terminal device, an access network device, and a UPF may adjust, based on a change of a service requirement of a target service, a QoS parameter set corresponding to the first QoS, and transmit a service of target data based on the QoS parameter set.

Abstract: A service data flow transmission method, a communication apparatus, and a communication system. The method includes: a user plane network element receives characteristic information of a service data flow and QoS information of the service data flow, where the characteristic information of the service data flow indicates traffic characteristic information corresponding to different time slices of the service data flow in a time period, and the QoS information indicates QCIs corresponding to the different time slices; determines, based on the characteristic information of the service data flow, a first time slice corresponding to a data packet of the service data flow; and sends the data packet to an access network device based on the first time slice corresponding to the data packet of the service data flow and a QCI corresponding to the first time slice.

Abstract: This application provide a MEC-based positioning method, a device, and a wireless communication system. The method includes: A first network element receives first positioning request information for requesting to position a terminal, and the first positioning request information carries identification information of the terminal. The first network element determines, based on the first positioning request information, a positioning functional entity for positioning the terminal, where the positioning functional entity is a positioning server. The first network element obtains second positioning request information based on the first positioning request information, and sends the second positioning request information to the positioning server. After receiving the second positioning request information, the positioning server sends measurement request information to the terminal via a user plane, to request the terminal to report measurement data.

Abstract: This application provides a data transmission method and an apparatus. In the method, a first data unit is received from a server or a data network, wherein the first data unit comprises first identification information and second identification information, a target transmission requirement corresponding to the first data unit is obtained based on the first identification information, protocol data encapsulation is performed on the first data unit based on the target transmission requirement, to obtain a second data unit that comprises third identification information related to the second identification information; and the second data unit is sent to an access network device.

Abstract: Embodiments of this application provide an adaptive data flow transmission method, an apparatus, and a system, relating to the field of communication technologies. The method is used to perform, when a frame rate of a downlink data flow of a service changes, network resource adaptation promptly based on the frame rate of the data flow, to avoid a waste of network resources or a packet loss of media frame data, so as to improve network resource utilization and user experience.

Abstract: A communication method and apparatus are provided. A first device determines a first latency of at least one uplink protocol data unit (PDU) set, where the at least one uplink PDU set corresponds to a first downlink frame, and any one of the at least one uplink PDU set includes at least one uplink PDU data packet. If the first device determines that the first latency is greater than a first preset threshold, the first device sends latency adjustment request information to a second device, where the latency adjustment request information includes the first latency, and the latency adjustment request information is used to request to adjust configuration information of a downlink latency based on the first latency. The second device adjusts the configuration information of the downlink latency based on the first latency. Therefore, a round-trip time (RTT) latency can be controlled at a PDU set granularity.

Abstract: The present disclosure relates to positioning request processing methods, devices, and systems In one example method, a mobility management network element receives a request message, and sends a first message to a location management network element based on the request message, where the first message is used to trigger the location management network element to obtain location information of a first terminal device through user plane positioning. After receiving the first message, the location management network element sends a second message to the first terminal device based on the first message by using a protocol data unit (PDU) session of the first terminal device, where the second message indicates the first terminal device to report positioning data.

Abstract: This application provide a MEC-based positioning method, a device, and a wireless communication system. The method includes: A first network element receives first positioning request information for requesting to position a terminal, and the first positioning request information carries identification information of the terminal. The first network element determines, based on the first positioning request information, a positioning functional entity for positioning the terminal, where the positioning functional entity is a positioning server. The first network element obtains second positioning request information based on the first positioning request information, and sends the second positioning request information to the positioning server. After receiving the second positioning request information, the positioning server sends measurement request information to the terminal via a user plane, to request the terminal to report measurement data.

Abstract: This application provides a communication method, apparatus, and system, and pertains to the field of communication technologies. In the method, a frame usually includes a plurality of data packets, that is, a data packet set. There is a lag in transmission of a data packet set, that is, a period of time is needed for receiving a 1st data packet in the data packet set to sending a last data packet by a network device. Therefore, the network device may determine a moment at which the network device receives the 1st data packet in the data packet set and a moment at which a terminal device receives the last data packet in the data packet set. In other words, time during which the data packet set stays on the network device is considered, to accurately determine transmission duration of the data packet set or transmission duration of the frame.

Abstract: Embodiments of this application disclose example data transmission method; and example communication apparatuses. One example method includes receiving, by a first core network function entity, multi-stream transmission information of a service, where the multi-stream transmission information indicates that the service is transmitted via first split data and second split data. The first core network function entity can then receive, based on the multi-stream transmission information, first quality of service QoS configuration information and second QoS configuration information, where the first QoS configuration information corresponds to the first split data, and the second QoS configuration information corresponds to the second split data. The first core network function entity can then output the first QoS configuration information and the second QoS configuration information.

Abstract: This application provides a communication method and apparatus. In the method, a policy control function (PCF) receives request information from a terminal or a service server. The request information requests to establish a first quality of service (QoS) flow for the terminal, and includes first indication information indicating to perform network coding on the first QoS flow. The PCF sends network coding information to an access network device accessed by the terminal and/or the terminal based on the request information. The network coding information includes second indication information indicating a QoS flow on which network coding is to be performed.

Abstract: Address information obtaining methods and apparatuses are described. It is determined that a network element that supports a type of a first NF and that is in a first network slice needs to be accessed. The type of the first NF and information about the first network slice is sent to a network repository network element to obtain address information of the network element that supports the type of the first NF and is in the first network slice. Address information of a first network element is received from the network repository network element. The first network element is the network element that supports the type of the first NF and that is in the first network slice. A terminal can obtain the address information of the network element that supports the type of the first NF and that is in the first network slice.

Abstract: A data transmission method includes receiving, by a network device, a tactile data flow and at least one first data flow sent by a machine-side device. The tactile data flow and the at least one first data flow includes a synchronization identifier. The data transmission method also includes synchronizing, by the network device, transmission time of the tactile data flow and transmission time of the at least one first data flow.

Abstract: A network access control method, apparatus, and device, where the method includes receiving a discovery request sent by a first network function (NF) instance, where the discovery request includes an identifier of a second public land mobile network (PLMN) and an NF type of a to-be-accessed NF instance. The method further includes: obtaining a to-be-accessed network slice identifier, and requesting a second network function management module (NFRF) corresponding to the identifier of the second PLMN for instance information of a second NF instance corresponding to the NF type of the to-be-accessed NF instance and the to-be-accessed network slice identifier; and sending the instance information to the first NF instance.

Abstract: A communication method includes receiving, by a first communication apparatus, indication information from a second communication apparatus, and determining, by the first communication apparatus, a first quality of service (QoS) of the extended reality (XR) service based on the at least one piece of QoS of an XR service. The first communication apparatus is a core network device or an access network device. The indication information is useable to indicate at least one piece of QoS of the XR service. The XR device receives data of the XR service or sends data of the XR service by a terminal device. The second communication apparatus is an XR server or a chip in the XR server.