Abstract: This application provides a wireless communication method and a communication apparatus. The method includes a terminal device receives a data frame from a second device by using a first device, and notifies the first device when the terminal device determines that a communication data block from the first device is not successfully received. After determining a protocol data packet corresponding to the communication data block, the first device notifies the second device that the first protocol data packet is not successfully transmitted. After determining a data unit that is in the data frame and that corresponds to the communication data block, the terminal device notifies the second device through second-step feedback.

Abstract: This application provides a reference signal RS transmission method and apparatus. The method includes: receiving configuration information from a network device. An RS is sent on an RS resource configured based on the configuration information. The RS resource is included in a plurality of RS resource groups, where an RS resource group i in the plurality of RS resource groups includes K first RS resources configured based on the configuration information, transmission moments of the K first RS resources are successively Ti,1, Ti,2, . . . , Ti,K, an RS resource group (i+1) in the plurality of RS resource groups includes K second RS resources configured based on the configuration information, and transmission moments of the K second RS resources are successively Ti+1,1, Ti+1,2, . . . , Ti+1,K, and satisfy: Ti,m+1?Ti,m=Pm, Ti+1,m+1?Ti+1,m=Pm, and Ti+1,k?Ti,k=Qi.

Abstract: A buffer status report sending method and a communication apparatus are provided. The buffer status report sending method includes: receiving a first configuration message from an access network device, where the first configuration message is used to configure a one-to-one correspondence between a plurality of buffer status BS intervals and a plurality of index values; and sending a buffer status report BSR to the access network device based on the correspondence, where the BSR includes a target index value, and the plurality of index values include the target index value. According to the BSR sending method, a terminal may send the BSR to the access network device based on the correspondence that is between the BS interval and the index value and that is configured by the access network device for the terminal, to request a transmission resource that better meets an actual requirement of the terminal.

Abstract: A data transmission method and an apparatus are provided. In the provided method and apparatus, a terminal can properly discard a part of to-be-transmitted data and notify a base station, to improve resource utilization in a transmission process of XR data.

Abstract: A data transmission method and a data transmission apparatus are provided, to help reduce a transmission delay of a service frame. The method includes: A terminal sends first indication information to a network device. The first indication information indicates a statistical parameter of a delay jitter of an arrival time of a service frame. The statistical parameter of the delay jitter is for determining a CG resource. The network device sends second indication information to the terminal. The second indication information indicates the CG resource. The CG resource is determined based on the first indication information. The terminal and the network device communicate the service frame based on the CG resource.

Abstract: A communication method and apparatus resolve invalid communication in a packet loss scenario of an XR service, so that device power consumption is reduced, and communication resources are saved. A first communication device obtains information about a data unit to which a data packet belongs, where the data unit includes one or more data packets. The first communication device discards a data packet that is being transmitted and a data packet that is not transmitted that are in the data unit. The first communication device sends indication information to a second communication device, where the indication information includes the information about the data unit.

Abstract: A data transmission method and a communication apparatus are provided. The method includes: receiving a first identifier from a core network element, where the first identifier indicates that a first quality of service QoS data flow and a second QoS data flow belong to a first data unit; based on the first identifier and a first synchronization time parameter, mapping the first QoS data flow and the second QoS data flow respectively to a first access network resource and a second access network resource and sending the first QoS data flow and the second QoS data flow to a terminal device, where the first synchronization time parameter indicates a maximum interval between a moment at which sending of the first QoS data flow is completed and a moment at which sending of the second QoS data flow is completed.

Abstract: This application provides a data transmission method and apparatus. The method includes: receiving a first data packet and a first neural network data packet, where the first neural network data packet is used to carry neural network parameter information, the neural network parameter information is used to process data of a first video frame data packet, the first data packet includes first identification information, the first neural network data packet includes second identification information, and the first identification information and the second identification information each indicate a correspondence between the first data packet and the first neural network data packet; and sending the first data packet and the first neural network data packet based on the first identification information and the second identification information.

Abstract: This application provides a data sending method and a communication apparatus. The method includes: A first node determines, based on a quality of a channel between the first node and a second node, a sending time for starting to send data, where the first node is one of several candidate previous-hop nodes of the second node. The first node starts to send the data to the second node at the sending time. According to the data sending method, when a node needs to send data to a next-hop node of the node, the node may determine, based on quality of a channel between the node and the next-hop node of the node, a sending time for starting to send the data.

Abstract: A delay budget determining method and apparatus are provided. A communication device first determines a transmission delay of a first data packet from a server to a communication device, and then determines a delay budget of the first data packet from the communication device to a terminal device based on the transmission delay and an end-to-end packet delay budget. The delay budget of the first data packet from the communication device to the terminal device is determined based on the transmission delay of the first data packet from the server to the communication device. Therefore, even for an end-to-end delay-sensitive service, a transmission delay of a data packet of the end-to-end delay-sensitive service can also be ensured.

Abstract: In the field of communication technologies, a physical downlink control channel (PDCCH) monitoring method and apparatus can be provided to reduce power consumption of a terminal device. The method includes: receiving configuration information from a network device; and monitoring a PDCCH in M1 first time windows in N1 first time windows of a first time period based on the configuration information, where the first time period is a discontinuous reception DRX duration period, N1 is an integer greater than or equal to 2, and M1 is a positive integer less than N1.

Abstract: A data transmission method and an apparatus are provided. In the method, a terminal receives configured grant (CG) information from a network device; obtains a configured quantity N of transport blocks (TBs) in a CG periodicity based on the CG information, where the configured quantity N of TBs is a maximum quantity of TBs transmittable in the CG periodicity, and N is an integer greater than 0; and sends, to the network device in the CG periodicity, uplink data corresponding to M TB, where Mis an integer greater than 0 and less than or equal to N. According to the method, complete transmission of an extended reality (XR) video frame can be completed in the CG periodicity, thereby improving user experience of receiving an XR service.

Abstract: A resource configuration method and a communication apparatus are provided, so that an SPS/CG period can better match an XR service that arrives periodically based on a frame rate, thereby effectively reducing a transmission delay of the XR service and improving system performance. The method includes the following steps: a network device sends first CG configuration information to a terminal. Correspondingly, the terminal receives the configuration information, and obtains first period duration M1 of a first CG period and a quantity X of CGs in the first CG period based on the information, where M1 is greater than zero, and X is an integer greater than zero.

Abstract: A data transmission method and a communication apparatus are provided. The method includes: A network device sends first information to a terminal. The terminal receives the first information, and determines an evaluation mode of user experience based on the first information. The terminal sends second information to the network device. The network device receives the second information, and communicates with the terminal based on the second information. The first information is used to configure the evaluation mode of user experience, the evaluation mode of user experience is one of a plurality of evaluation modes of user experience, the evaluation mode of user experience is used to evaluate impact of network transmission on user experience, and the second information includes information about the impact of the network transmission on user experience.

Abstract: This application provides an extended reality data transmission method and an apparatus. The method includes: determining that a data type is extended reality data; determining, based on the data type, to obtain, based on delay information and transmission error information, extended reality quality indicator XQI information corresponding to a target rate, where the XQI information indicates transmission quality of the extended reality data; and performing communication based on the XQI information.

Abstract: A method and an apparatus are provided. In the method, first discontinuous reception DRX configuration information is obtained; first cycle duration T1 of a first DRX cycle, a quantity N1 of first on-duration periods in the first DRX cycle, and duration of the first on-duration period are obtained based on the first DRX configuration information, where T1>0 and N1>0; and a physical downlink control channel PDCCH is monitored in one or more first on-duration periods in the first DRX cycle based on the first cycle duration T1, the quantity N1 of first on-duration periods, and the duration of the first on-duration period. According to the method, an on-duration period in a DRX cycle can match an arrival cycle of data.

Abstract: A data sending method includes: performing, by a first node, rate matching to determine a first bit sequence; determining, by the first node, a first symbol sequence based on the first bit sequence, and determining some to-be-mapped symbols in the first symbol sequence; and mapping, by the first node, the symbols to a first resource, and sending the symbols.

Abstract: This application provides a data transmission method and an apparatus that are used for extended reality (XR) technologies. In a data transmission method disclosed herein, different parts of to-be-transmitted data are segmented into different code blocks (CBs), to mitigate impact of a transmission failure of one part of the to-be-transmitted data on another part of the to-be-transmitted data, thereby improving overall user experience in data reception. In this way, transmissions of low priority data and high priority data may be separated to avoid performance degradation caused by the low priority data on the high-priority data.

Abstract: Embodiments of the present invention disclose a reference signal transmission method, including: sending, by a terminal, a first reference signal and a second reference signal; and correspondingly, receiving, by a network device, the first reference signal and the second reference signal, where the first reference signal is mapped to a plurality of symbols and is used for estimation of channel state information, the second reference signal is mapped to at least two of the plurality of symbols and is used for phase tracking, and a subcarrier to which the second reference signal is mapped on one of the at least two symbols has a same frequency-domain location as a subcarrier to which the second reference signal is mapped on the rest of the at least two symbols. With the foregoing solution, accuracy of channel state information estimation can be improved.

Abstract: Example quasi co-location information determining methods and apparatus are described. One example method includes determining a quantity X of pieces of quasi co-location QCL information, where X is a positive integer. When it is determined that the quantity X of pieces of QCL information is two, and that DCI corresponding to a current data channel does not indicate QCL information of an antenna port of the data channel, or that an interval between the current data channel and the DCI corresponding to the data channel is less than a threshold, two pieces of default QCL information of the antenna port of the data channel are determined.