Embodiments of this application provide an information sending method, an information receiving method, and a related device. In the information sending method, a network device sends first signaling that carries first indication information, and the network device further sends second signaling that carries second indication information. The first indication information indicates a subset identifier corresponding to a first precoding subset in a first codebook. The first codebook includes a plurality of precoding subsets. Each precoding subset includes a plurality of precoding matrices, and different precoding subsets correspond to different subset identifiers. The second indication information indicates a matrix identifier corresponding to a first precoding matrix in the first precoding subset. Precoding matrices in the first precoding subset correspond to different matrix identifiers, and the first precoding matrix is used to precode a physical uplink shared channel (PUSCH) carried on a first subband.

This application discloses an uplink data sending method, an uplink data receiving method, and a communication apparatus. The sending method includes: A first terminal device sends first indication information to a network device, where the first indication information is used to determine a first precoding codebook subset to be used by a virtual terminal device. In this way, the network device sends configuration information to the first terminal device based on the first precoding codebook subset to be used by the virtual terminal device, so that the first terminal device sends data to the network device based on the first precoding codebook subset.

A method of a base station communicating with a plurality of User Equipments (UEs), includes: identifying a number of activated UEs from among the plurality of UEs; selecting, among a plurality of feedback schemes, a feedback scheme supporting a highest data throughput at the identified number of activated UEs with reference to history information; determining (i) a number of UEs in a companion group and (ii) a codebook size, the number of UEs in the companion group and the codebook size being corresponding to the selected feedback scheme; and performing Multiple Input and Multiple Output (MIMO) communication with the activated UEs based on the determined number of UEs in the companion group and the determined codebook size.

In a method, a terminal device reports, to a network device, a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before transmission channel switching. The network device or the terminal device in a communications system may determine, according to a specified rule and full-power transmission codebook subsets corresponding to a plurality of source frequency bands, a full-power transmission codebook subset corresponding to a target frequency band after transmission channel switching. The plurality of source frequency bands are frequency bands in which a plurality of target antenna ports are located before antenna port switching, and the plurality of target antenna ports are antenna ports in the target frequency band after antenna port switching.

An example method includes receiving a configuration from the wireless communication node. The configuration indicates at least one of one or more numbers of port groups or one or more levels of coherence. The example method further includes determining a precoder for a transmission according to the configuration. The example method further includes performing the transmission using the precoder. In some embodiments, a total number of ports across the port groups is eight.

A method for operating a user equipment (UE) comprises receiving configuration information about a channel state information (CSI) report, the configuration information including codebook parameters (M, ?, ?), wherein: M is a number of frequency domain basis vectors, ? is a number ?1, and ? is a number ?1; identifying values of M, ?, and ?; determining a value of K.sub.1 based on ?, where K.sub.1 is a number of selected CSI reference signal (CSI-RS) ports from a total of P CSI-RS ports; determining a maximum number of non-zero coefficients based on ?; determining the CSI report based on the values of M, K.sub.1, and the maximum number of non-zero coefficients; and transmitting the CSI report.

Enhanced channel state information (CSI) reporting may include encoding a CSI reporting configuration associated with a first transmission and reception point (TRP) and a second TRP. The CSI reporting configuration may include at least one codebook configuration. The at least one codebook may include at least one of a rank restriction configuration or a codebook subset restriction (CBSR) configuration. The at least one of the rank restriction configuration or the CBSR configuration may correspond to at least one of a particular type of TRP measurement, a particular TRP of the first TRP or the second TRP, or channel measurement resources (CMRs) associated with at least one of the first TRP or the second TRP. A CSI measurement communication received from a user equipment (UE) may be decoded. The CSI measurement communication may be based on the decoded CSI reporting configuration.

A first node receives N CSI configuration information; updates a CSI reporting in a first CSI reporting subset; transmits a first information block; the N CSI configuration information is respectively used to determine N CSI reportings, and the first CSI reporting subset is a subset of the N CSI reportings; the first information block comprises at least one CSI reporting of the N CSI reportings; any Type I CSI reporting in the N CSI reportings corresponds to a first-type integer, and any Type II CSI reporting in the N CSI reportings corresponds to a second-type integer, the N CSI reportings respectively correspond to N priorities, and the N priorities are used to determine a number of CSI reporting(s) comprised in the first CSI reporting subset. The above method configures different processing units for CSI reportings with different CSI computing power requirements, thus avoiding the waste of computing power.

An uplink precoding method and an apparatus are provided. The method includes: A terminal device receives first information from an access network device; the terminal device determines a first precoding matrix based on the first information and a first model, where the first precoding matrix is determined based on an output of the first model, and an input of the first model is determined based on the first information; the terminal device precodes an uplink signal based on the first precoding matrix; and the terminal device sends a precoded uplink signal to the access network device. In the method, the terminal device determines the first precoding matrix based on the first information and the first model. The precoding matrix is no longer selected from an offline codebook, but is a floating-point matrix generated by the terminal device based on the first information.

Devices and methods for performing a beam management operation are provided in this disclosure. A radio communication device may include a transceiver that is configured to transmit a plurality of reference signals, each reference signal being beamformed based on a set of beamforming weights that is different from a set of beamforming weights of at least one other reference signal, and receive a plurality of measurement results representing measurements for at least some of the plurality of reference signals. The radio communication device may further include a processor that is configured to provide the plurality of measurement results to a machine learning model configured to determine a parameter for a beam management operation using a predefined codebook and perform the beam management operation according to the predefined codebook based on the determined parameter.