Methods, systems, and apparatuses for channel state information acknowledgment in coordinated beamforming

An apparatus comprising:

• at least one processor;
• and
• at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to:
• control channel sounding for a wireless channel in coordination with an access point device;
• transmit a channel state information (CSI) acknowledgment request to the access point device;
• receive a CSI acknowledgment message from the access point device in response to the CSI acknowledgment request;
• and
• determine whether to continue the channel sounding for the wireless channel based on the CSI acknowledgment message.

A method comprising:

• transmitting a null data packet to a station device in response to initiation of channel sounding for a wireless channel by an access point device;
• receiving channel state information (CSI) from the station device based on the null data packet;
• receiving a CSI acknowledgment request from the access point device;
• and
• based on the CSI acknowledgment request, transmitting a CSI acknowledgment message associated with the channel sounding.