Abstract: A method includes a first device that sends a beacon message on a beacon indication resource corresponding to a first resource, where the beacon message indicates that the first resource is used by a device in a first user group and another user group cannot use all or a part of the first resource; or the first device skips sending the beacon message on the beacon indication resource corresponding to the first resource such that a device in the other user group determines that the first resource is not used by the device in the first user group and all or part of the first resource can be temporarily used by the device in the other user group.

Abstract: This application discloses an information sending method and an apparatus, and relate to the communication field. The method includes: A first terminal sends a first indication message to a second terminal, where the first indication message indicates the second terminal to report first information; the second terminal reports the first information to the first terminal according to the first indication message, where the first information indicates channel state information of a channel resource; the first terminal sends a second indication message to the second terminal, where the second indication message indicates information about a first resource set, the first resource set is determined by the first terminal based on the first information, and a resource in the first resource set is a resource for sidelink communication.

Abstract: A first device receives first configuration information used for beam training, and may determine, based on the first configuration information, L codewords associated with M reference signals. The first device may measure the M reference signals, determine V codewords in the L codewords based on a measurement result, and report first indication information indicating the V codewords.

Abstract: This application provides a data transmission method, a terminal device, and a network device. The method includes: determining, by a terminal device, reference information; and sending, by the terminal device, second channel state information (CSI) based on a comparison result of the reference information and a status parameter, where the second CSI includes all parameters in first CSI or includes some parameters in the first CSI, the first CSI is CSI that needs to be reported and that is configured by a network device for the terminal device, and the status parameter includes at least one of a transmission parameter of uplink data, a parameter in the first CSI, and a transmission parameter of the first CSI. The data transmission method, the terminal device, and the network device in embodiments of this application help improve transmission performance of CSI.

Abstract: This application provides an information transmission method and apparatus. The method includes: receiving, by a terminal device, a plurality of pieces of downlink control information DCI, where each of the plurality of pieces of DCI is used to trigger reporting of one piece of UCI and indicate a physical uplink control channel PUCCH resource carrying the UCI, the UCI includes at least one piece of channel state information CSI and response information, and PUCCH resources indicated by the plurality of pieces of downlink DCI occupy at least one same orthogonal frequency division multiplexing OFDM symbol; and sending, by the terminal device, target UCI on a target PUCCH resource, where the target UCI includes UCI triggered by the plurality of pieces of DCI, and the target PUCCH resource is one of the PUCCH resources indicated by the plurality of pieces of DCI.

Abstract: This application provides a communication method, apparatus, and system, to improve transmission performance in a communication process. The method includes: A terminal device determines a power control parameter of a PUSCH based on precoding indication information used by the PUSCH, where the precoding indication information includes n TPMIs, each TPMI corresponds to a set of power control parameters, at least two of the n TPMIs respectively correspond to different power control parameters, and each TPMI corresponds to some time-frequency resources occupied by the PUSCH, where n is a positive integer. The terminal device sends the PUSCH based on the power control parameter.

Abstract: A method includes receiving, from a reference node, a first positioning measurement reference signal transmitted through N transmission paths, where N is an integer greater than 1; measuring first positioning information based on the first positioning measurement reference signal on a first transmission path, where the first transmission path is one of the N transmission paths; and sending first indication information and a second positioning measurement reference signal to the reference node, where the first indication information is used to indicate the first transmission path, so that the reference node measures second positioning information on the first transmission path.

Abstract: A communication method and a communications apparatus: A network device sends first signaling, where the first signaling is used to configure K1 channel state information-reference signal CSI-RS resources; a terminal device receives the first signaling, and reports channel state information CSI; and the network device receives the CSI, where the CSI includes a channel quality indicator CQI of a first codeword, a channel measurement part used to calculate the CQI of the first codeword is determined based on channel measurement results of K2 CSI-RS resources.

Abstract: Embodiments of this application provide a precoding matrix indication method, a communications apparatus, and a storage medium. A precoding matrix of each of K frequency-domain units satisfies W=W1×W2, and elements in W2 in the K frequency-domain units are represented by P elements that are relatively few. A terminal device reports third indication information, where the third indication information includes first indication information and the second indication information, and the first indication information and the second indication information are independently encoded. The first indication information is used to indicate the P elements, and the second indication information is used to indicate P. Therefore, the terminal device can adjust a quantity of information bits of the second indication information based on a channel condition change, thereby improving precoding matrix reporting efficiency.

Abstract: One example method includes determining, by a terminal device, that at least two physical uplink control channel (PUCCH) resources collide in a time unit n, where n is an integer, and the at least two PUCCH resources include a first resource configured for first uplink control information (UCI) and a second resource configured for second UCI. The terminal device can determine the first resource and a third resource in the time unit n, where the third resource is one of M PUCCH resources, the first resource and the third resource do not include a same orthogonal frequency division multiplexing (OFDM) symbol in time domain, M is a positive integer greater than or equal to 1, the first resource is used to carry a part or all of the first UCI, and the third resource is used to carry a part or all of the second UCI.

Abstract: One example method includes determining, by a terminal device, that at least two physical uplink control channel (PUCCH) resources collide in a time unit n, where n is an integer, and the at least two PUCCH resources include a first resource configured for first uplink control information (UCI) and a second resource configured for second UCI; and determining, by the terminal device, the first resource and a third resource in the time unit n, where the third resource is one of M PUCCH resources, the first resource and the third resource do not include a same orthogonal frequency division multiplexing (OFDM) symbol in time domain, and M is a positive integer greater than or equal to 1, and the first resource is used to carry a part or all of the first UCI, and the third resource is used to carry a part or all of the second UCI.

Abstract: A communication method and apparatus improve accuracy of correcting a frequency offset. Configuration information received from a network device provides for configuring one or more uplink reference signal resources each including a first time unit and a second time unit. The first time unit includes a first antenna port. The second time unit includes a second antenna port. An uplink reference signal is sent to the network device based on the configuration information.

Abstract: This application provides a data transmission method, a terminal device, and a network device. The method includes: determining, by a terminal device, reference information; and sending, by the terminal device, second channel state information (CSI) based on a comparison result of the reference information and a status parameter, where the second CSI includes all parameters in first CSI or includes some parameters in the first CSI, the first CSI is CSI that needs to be reported and that is configured by a network device for the terminal device, and the status parameter includes at least one of a transmission parameter of uplink data, a parameter in the first CSI, and a transmission parameter of the first CSI. The data transmission method, the terminal device, and the network device in embodiments of this application help improve transmission performance of CSI.

Abstract: A downlink control channel transmission method, a receiving network element, and a sending network element are provided, to improve accuracy of beam measurement. A receiving network element obtains target downlink control information (DCI) on a first target control channel candidate in a target control channel candidate set, where the target DCI is DCI of the receiving network element, and the first target control channel candidate includes one or more control channel element groups (CCEGs); the receiving network element determines, based on the target DCI, a quantity of measurement reference signals and a time-frequency resource corresponding to each measurement reference signal; the receiving network element measures each measurement reference signal, to obtain channel quality information corresponding to each measurement reference signal; and the receiving network element reports the channel quality information corresponding to each measurement reference signal to a sending network element.

Abstract: This application provides channel state information reporting methods and communications apparatuses. One method includes: generating first indication information and a plurality of groups of second indication information, where the first indication information indicates a plurality of frequency domain component vectors, each group in the plurality of groups of second indication information corresponds to a spatial layer and a plurality of spatial domain component vectors and constructs precoding vectors of the spatial layer in a plurality of frequency bands, and each piece of second indication information in each group corresponds to a spatial domain component vector in the plurality of spatial domain component vectors and indicates at least one of the plurality of frequency domain component vectors that corresponds to the spatial domain component vector; and sending the first indication information and the second indication information.

Abstract: This application provides a wireless communication method, a terminal device, and a network device. The method includes: determining, by a terminal device, a pilot signal corresponding to at least one of a plurality of search sections of a control channel; and detecting, by the terminal device, a control channel candidate in the at least one search section based on a quasi-co-location (QCL) association between the pilot signal corresponding to each search section and the demodulation pilot of the control channel candidate in each search section.

Abstract: The present disclosure relates to channel state measurement methods and apparatus. One example method includes selecting, by a network device from N channel state information reference signal (CSI-RS) resources, a target CSI-RS resource and a target channel state information-interference measurement (CSI-IM) resource group associated with the target CSI-RS resource, where an ith CSI-RS resource in the N CSI-RS resources is associated with ni CSI-IM resource groups, and a kth CSI-IM resource group in the ni CSI-IM resource groups includes xik CSI-RS resources in the N CSI-RS resources except the ith CSI-RS resource, and sending, by the network device, first indication information by using first signaling, where the first indication information indicates the target CSI-RS resource and the target CSI-IM resource group.

Abstract: This application provides example reference signal (RS) transmission methods and example communication apparatuses. One example reference signal transmission method includes receiving, by a terminal device, first information in a first time unit, where the first information triggers the terminal device to transmit a RS. The terminal device can then transmit the RS in a second time unit, where the second time unit is indicated by a time offset indicator n in valid uplink transmission time units starting from the first time unit.

Abstract: The present disclosure relates to reference signal sending methods, signal detection methods, and apparatus. One example method includes determining an initial seed parameter of a pseudo-random sequence, and generating the pseudo-random sequence based on the initial seed parameter, where the initial seed parameter is determined based on attribute information of a terminal device, determining a cyclic shift value based on the pseudo-random sequence, and determining a reference signal based on the cyclic shift value, and sending the reference signal to a network device.

Abstract: This application provides an information transmission method and apparatus. The method includes: receiving, by a terminal device, a plurality of pieces of downlink control information DCI, where each of the plurality of pieces of DCI is used to trigger reporting of one piece of UCI and indicate a physical uplink control channel PUCCH resource carrying the UCI, the UCI includes at least one piece of channel state information CSI and response information, and PUCCH resources indicated by the plurality of pieces of downlink DCI occupy at least one same orthogonal frequency division multiplexing OFDM symbol; and sending, by the terminal device, target UCI on a target PUCCH resource, where the target UCI includes UCI triggered by the plurality of pieces of DCI, and the target PUCCH resource is one of the PUCCH resources indicated by the plurality of pieces of DCI.