US 12,323,202 B2
Explicit beamforming in a high efficiency wireless local area network
Rui Cao, Fremont, CA (US); and Hongyuan Zhang, Fremont, CA (US)
Assigned to Marvell Asia Pte Ltd, Singapore (SG)
Filed by Marvell Asia Pte Ltd, Singapore (SG)
Filed on Nov. 27, 2023, as Appl. No. 18/520,523.
Application 16/173,955 is a division of application No. 15/176,934, filed on Jun. 8, 2016, granted, now 10,116,359, issued on Oct. 30, 2018.
Application 18/520,523 is a continuation of application No. 17/718,077, filed on Apr. 11, 2022, granted, now 11,831,367.
Application 17/718,077 is a continuation of application No. 16/700,562, filed on Dec. 2, 2019, granted, now 11,303,330, issued on Apr. 12, 2022.
Application 16/700,562 is a continuation of application No. 16/173,955, filed on Oct. 29, 2018, granted, now 10,498,409, issued on Dec. 3, 2019.
Claims priority of provisional application 62/244,278, filed on Oct. 21, 2015.
Claims priority of provisional application 62/172,500, filed on Jun. 8, 2015.
Prior Publication US 2024/0097748 A1, Mar. 21, 2024
Int. Cl. H04B 7/0417 (2017.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01); H04L 5/00 (2006.01); H04W 16/28 (2009.01)
CPC H04B 7/0421 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0626 (2013.01); H04B 7/066 (2013.01); H04L 5/0007 (2013.01); H04W 16/28 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for communication in a wireless communication network, the method comprising:
receiving, at a first communication device, a sounding packet from a second communication device, the sounding packet including a first plurality of training orthogonal frequency division multiplexing (OFDM) symbols, the first plurality of training OFDM symbols corresponding to OFDM tones of respective training OFDM symbols, among the first plurality of training OFDM symbols, having been modulated with training signals, wherein each of the respective training OFDM symbols, among the first plurality of training OFDM symbols, has a first time duration, and wherein each training OFDM symbol among the first plurality of training OFDM symbols includes a first number of OFDM tones on which a training signal is modulated;
developing, at the first communication device, beamforming information using the first plurality of training OFDM symbols, the beamforming information for the first number of OFDM tones;
transmitting, by the first communication device, beamforming feedback to the second communication device, the beamforming feedback including the beamforming information for the first number of OFDM tones, the beamforming information for use by the second communication device to beamsteer a data packet to the first communication device, the data packet having a data portion that includes a second number of OFDM tones greater than the first number of OFDM tones, wherein the beamforming feedback i) includes beamforming information for a first subset of OFDM tones in the data portion of the data packet and ii) omits beamforming information for a second subset of OFDM tones in the data portion of the data packet; and
after transmitting the beamforming feedback, receiving, at the first communication device, the data packet from the second communication device, the data packet including one or more data OFDM symbols in the data portion, each of the one or more data OFDM symbols having i) a second time duration that is longer than the first time duration, and ii) the second number of OFDM tones, wherein OFDM tones of the one or more data OFDM symbols include i) the first subset of OFDM tones beamsteered based on the beamforming feedback that incudes beamforming information for the first subset of OFDM tones and ii) the second subset of OFDM tones beamsteered based on the beamforming feedback that omits beamforming information for the second subset of OFDM tones.