Abstract: A communication method performed by a device includes receiving configuration information, determining, based on the configuration information, a PDCCH monitoring occasion corresponding to first system information, and obtaining the first system information from the PDCCH monitoring occasion corresponding to the first system information. The configuration information includes: an index of the first system information, where the first system information includes P types of system information, and P is an integer greater than or equal to 1; a quantity n of SSBs in a yth group in Y groups in one SSB periodicity, where the yth group is any one of the Y groups; and a quantity M of PDCCH monitoring occasions that correspond to the P types of system information and that are included in the yth group.

Abstract: This application relates to the communication field, and discloses a communication method and apparatus. Including: A terminal receives first measurement timing configuration information from a network device, where the first measurement timing configuration information is used to configure a first cell list and M offsets corresponding to the first cell list, and the M offsets respectively correspond to M measurement occasions; and the terminal measures an SSB of each cell in the first cell list on the M measurement occasions, where the M measurement occasions include a first measurement occasion, and a first offset corresponding to the first measurement occasion is a time interval between a time domain start position of the first measurement occasion and a time domain start position of a measurement periodicity. In this way, duration for measuring the SSB by the terminal can be effectively reduced, and power consumption of the terminal can be reduced.

Abstract: This application provides receiving a target synchronization signal block and first configuration information from a network device, where the first configuration information includes a first offset value, and the first offset value indicates interval duration between a start time domain position of a first association period and a start time domain position of a reference system frame; then, determining, based on the first configuration information and the target synchronization signal block, a random access occasion that is associated with the target synchronization signal block and that is in one or more association periods; and finally, sending a preamble to the network device on one random access occasion associated with the target synchronization signal block.

Abstract: A communication method and a communication apparatus are disclosed. A terminal receives a synchronization signal/physical broadcast channel block SSB, where the SSB may carry configuration information used to determine a time domain position of search space of scheduling information of a first system information block SIB, the first SIB is a SIB other than a SIB 1, and the first SIB is used to carry information related to random access of the terminal. The terminal may determine the time domain position of the search space of the scheduling information of the first SIB based on first configuration information. In the foregoing solution, the terminal can monitor and receive the scheduling information of the first SIB and the first SIB without obtaining the SIB 1.

Abstract: A synchronization signal block transmission method. When a terminal device receives at least one of N SSBs; and the terminal device determines a time position of a first SSB based on a number of the first SSB in the at least one SSB and a sending parameter, where the sending parameter is used to determine N candidate sending positions for transmitting the N SSBs in one periodicity T1, the N candidate sending positions are in at least two system frames, and the sending parameter includes one or more of the following parameters: a sweeping periodicity T3, a quantity of candidate sending positions included in each system frame, a time interval between two consecutive system frames of candidate sending positions included in each periodicity T1, and a quantity of system frames of the candidate sending positions included in each periodicity T1.

Abstract: A coding method and an apparatus are provided. XR data of different dimensions or different QoS requirements are distinguished during coding.

Abstract: This application provides example uplink transmission methods and communication apparatuses. One example method includes sending first scheduling information by a network device to a first terminal and a second terminal, where the first scheduling information includes indication information of a sidelink transmission parameter and indication information of a first uplink transmission parameter, the sidelink transmission parameter is used by the first terminal to send first data to the second terminal, and the first uplink transmission parameter is used by the second terminal to send the first data to the network device. The first data is received by the network device from the second terminal.

Abstract: A configuration information sending method and an apparatus is applied to fields such as user cooperation, user relay, and an internet of vehicles. First configuration information is sent to a first user group, where the first configuration information indicates at least one resource element, the first user group includes a first terminal apparatus and a second terminal apparatus, and the first terminal apparatus is configured to assist in information transmission between a first network apparatus and the second terminal apparatus. The first network apparatus sends first downlink control information to the first user group, where the first downlink control information indicates a first resource element in the at least one resource element and a first time-frequency resource, and the first time-frequency resource belongs to the first resource element.

Abstract: An ephemeris information indication method and an apparatus are provided. In the method, a terminal device receives ephemeris information in a time window, where the ephemeris information corresponds to a system information modification period in which the time window is located. The terminal device determines, based on the system information modification period and a start position of the system information modification period, the system information modification period in which the time window is located. The terminal device determines the ephemeris information reference time based on an end position of a 1st time window in the system information modification period in which the time window is located.

Abstract: A data transmission method and apparatus, and a related device, and may be used in the internet of vehicles, for example, V2X, LTE-V, or V2V, or may be used in fields such as D2D, intelligent driving, and intelligent connected vehicle. A network device may send first downlink control information to a first terminal device and a second terminal device, to indicate the first terminal device and the second terminal device to perform user cooperative transmission in a first stage. After the transmission in the first stage is completed, the network device sends second downlink control information to the first terminal device and the second terminal device, to indicate the first terminal device and the second terminal device to perform user cooperative transmission in a second stage. The network device uses a two-level scheduling manner to improve transmission efficiency in the second stage.

Abstract: This application discloses a multi-hop transmission method and an apparatus, which are applicable to fields such as V2X, internet of vehicles, intelligent connected vehicles, assisted driving, and intelligent driving, to resolve a problem that a multi-hop transmission latency is large in a conventional technology. In example embodiments, terminal devices participating in multi-hop transmission may share a shared resource pool. A first terminal device and a second terminal device participating in the multi-hop transmission are used as an example. The multi-hop transmission method includes: sending, by the first terminal device, data to the second terminal device on a first resource in the shared resource pool; and if the first terminal device fails to send the data on the first resource, retransmitting, by the first terminal device, the data to the second terminal device on a second resource in the shared resource pool.

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: 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: 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.