Method for channel sounding in wireless local area network and apparatus for the same

A device configured to perform channel sounding in a wireless local area network, the device comprising:

• a transceiver;
• and
• a controller operatively connected to the transceiver and configured to:
• receive a null data packet announcement (NDPA) frame from a transmitter to initiate the channel sounding;
• receive a null data packet (NDP) from the transmitter, the NDP following the NDPA frame;
• configure a first report field including beamforming information and a second report field including signal to noise ratio (SNR) information;
• determine whether feedback data including the first report field and the second report field is transmitted in a single feedback frame or a plurality of feedback frames;
• and
• if the feedback data is determined to be transmitted in the plurality of feedback frames, split the feedback data into a plurality of segments, and transmit the plurality of segments in a single aggregated medium access control protocol data unit (A-MPDU) including a plurality of MPDUs.

A method for channel sounding in a wireless local area network, the method performed by a transceiver and comprising:

• transmitting a null data packet announcement (NDPA) frame to a receiver to initiate the channel sounding;
• transmitting a null data packet (NDP) to the receiver, the NDP following the NDPA frame;
• and
• receiving feedback data in a single feedback frame or a plurality of feedback frames,
• wherein the feedback data includes a first report field including beamforming information and a second report field including signal to noise ratio (SNR) information, and
• wherein if the feedback data is received in the plurality of feedback frames, the feedback data is split into a plurality of segments, and the plurality of segments is received in a single aggregated medium access control protocol data unit (A-MPDU) including a plurality of MPDUs.

A device configured to perform channel sounding in a wireless local area network, comprising,

• a transceiver;
• and
• a controller operatively connected to the transceiver and configured to:
• transmit a null data packet announcement (NDPA) frame to a receiver to initiate the channel sounding;
• transmit a null data packet (NDP) to the receiver, the NDP following the NDPA frame;
• and
• receive a feedback data in a single feedback frame or a plurality of feedback frames,
• wherein the feedback data includes a first report field including beamforming information and a second report field including signal to noise ratio (SNR) information, and
• wherein if the feedback data is received in the plurality of feedback frames, the feedback data is split into a plurality of segments, and the plurality of segments is received in a single aggregated medium access control protocol data unit (A-MPDU) including a plurality of MPDUs.