A method according to some embodiments include reporting, by a beamformee, an encryption capability indicator to a beamformer, wherein the encryption capability indicator is indicative of a capability of the beamformee to encrypt a feedback frame. The method may also include receiving, by the beamformee from the beamformer, an announcement frame in response to the beamformer receiving an indication that the beamformee is capable of encrypting the feedback frame, and then sending, by the beamformee, an encrypted feedback frame.

A method is provided for channel sounding in a wireless local area network. A responding station receives a null data packet announcement (NDPA) frame and a null data packet (NDP) frame for the channel sounding from a requesting station. The NDP frame follows the NDPA frame. The responding station receives a first poll frame from the requesting station. In response to the first poll frame, the responding station transmits a first feedback data field including beamforming feedback information and signal to noise ratio (SNR) information to the requesting station. The responding station receives a second poll frame including a segment retransmission bitmap field indicating at least one segment of the first feedback data field from the requesting station. In response to the second poll frame, the responding station transmits a second feedback data field including the at least one segment of the first feedback data field to the requesting station.

Embodiments of the present application provide a channel state information transmission method. The method includes: receiving downlink data; determining an uplink subframe used to send feedback information of the downlink data, where a first downlink subframe set associated with the uplink subframe includes a first subset and a second subset, and the first subset is a proper subset of the second subset; determining a channel resource used to send the feedback information, where the channel resource includes a first uplink channel resource or a second uplink channel resource; and if sending of r pieces of CSI is configured to be sent, a codebook size of the feedback information corresponds to the first subset, and the determined channel is the second uplink channel resource, sending the feedback information and t pieces of CSI of the r pieces of CSI on the second uplink channel resource.

A first client station receives from an access point an indication of whether angular information is to be included in feedback information in a range measurement session. The first client station transmits a null data packet (NDP) as part of an uplink multi-user (MU) PHY transmission that also includes simultaneous transmissions by one or more second client stations of one or more other respective NDPs to the access point as part of the range measurement session. The first client station receives a downlink physical layer (PHY) data unit from the access point that includes respective downlink feedback frames for the first client station and the one or more second client stations. When angular information is to be included in the feedback, a downlink feedback frame for the first client station includes angular information.

The present disclosure provides a method for transmitting uplink control information, a method for receiving uplink control information, a method for configuring a downlink HARQ feedback function, a terminal and a base station. The method for transmitting uplink control information comprises: transmitting uplink control information to a base station, wherein the uplink control information comprises at least one of decoding statistical information for downlink transmission, suggestion information for downlink scheduling, or channel quality related information.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information for a beam report, wherein the configuration information indicates whether the beam report is associated with at least one of a subband granularity or a wideband granularity, wherein the beam report is for a reference signal received power (RSRP) measurement or a signal to interference plus noise ratio (SINR) measurement, and wherein the beam report is based at least in part on a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB). The UE may determine the beam report based at least in part on the configuration information. The UE may transmit the beam report. Numerous other aspects are provided.

According to a communication method of the present disclosure, a responder, after the end of transmission sector sweep (TXSS), receives from an initiator a first feedback frame including a BF training type FIELD indicating whether or not to implement a beam forming training (BFT) of a single user multi-input multi-output (SU-MIMO). If the BF training type FIELD indicates that a BFT of the SU-MIMO is to be implemented, the responder transmits to the initiator a second feedback frame based on the result of the TXSS and including a signal to noise ratio (SNR) and a sector identifier (ID) order. The initiator implements the BFT of the SU-MIMO between the initiator and the responder on the basis of the SNR and the sector ID order.

Embodiments of the present disclosure provide a beamforming method and device based on phase shifter switching control, and a system. The method includes: acquiring a channel vector of a channel of each of low-load terminals; acquiring, based on the channel vector, contribution degrees of phase shifters corresponding to the channel; sequentially changing a connected state of each of the phase shifters from closing to opening based on the contribution degrees of the phase shifters corresponding to the channel, calculating a to-be-processed signal-to-interference-plus-noise ratio (SINR) of the low-load terminal after changing the connected state of the phase shifter once, stopping to change the connected state of the phase shifter if the to-be-processed SINR meets a preset condition, and changing the connected state of the phase shifter meeting the preset condition to the closing.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE measures a first set of reference signals to determine a first channel state of a first channel between a first TRP and the UE. The UE measures interference received at the UE. The UE sends a first CSI report generated corresponding to the first channel state. The UE sends a second CSI report generated corresponding to the interference.

Methods, systems, and devices for configuring channel state information (CSI) reference signals (RS) in mobile communication technology are described. An example method for wireless communication includes transmitting, by a network node to a wireless device, a configuration of at least one CSI-RS and a configuration of a CSI report, transmitting, based on the configuration over one or more CSI-RS resources, the at least one CSI-RS, and receiving, from the wireless device, the CSI report based on the configuration of the CSI report. The configuration of the CSI report may comprise one or more of the following: a number of CSI-RS ports related to a specific number of frequency basis vectors, or an index of a frequency basis vector corresponding to the specific number.