US 12,355,592 B2
Enhanced trigger-based null data packet for channel sounding
Feng Jiang, Santa Clara, CA (US); Robert Stacey, Portland, OR (US); Jonathan Segev, Sunnyvale, CA (US); Qinghua Li, San Ramon, CA (US); and Xiaogang Chen, Portland, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by INTEL CORPORATION, Santa Clara, CA (US)
Filed on Mar. 31, 2023, as Appl. No. 18/194,439.
Application 18/194,439 is a continuation of application No. 17/210,364, filed on Mar. 23, 2021.
Application 17/210,364 is a continuation of application No. 16/234,217, filed on Dec. 27, 2018, abandoned.
Claims priority of provisional application 62/629,966, filed on Feb. 13, 2018.
Prior Publication US 2023/0239178 A1, Jul. 27, 2023
Int. Cl. H04L 25/02 (2006.01); H04L 5/00 (2006.01); H04W 24/10 (2009.01); H04W 74/08 (2009.01); H04W 84/12 (2009.01)
CPC H04L 25/023 (2013.01) [H04L 5/00 (2013.01); H04L 25/0212 (2013.01); H04L 25/0228 (2013.01); H04L 25/0258 (2013.01); H04W 24/10 (2013.01); H04W 74/08 (2013.01); H04W 84/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A device, the device comprising processing circuitry coupled to storage, the processing circuitry configured to:
transmit a ranging trigger frame to a group of initiating station devices (ISTAs) in a trigger based (TB) ranging exchange, wherein the ranging trigger frame is a trigger frame of subvariant sounding, wherein the ranging trigger frame allocates uplink resources to one or more ISTAs, and wherein a supported mode is a 2× high efficiency-long training field (2× HE-LTF) with a 1.6 μs Guard Interval (GI);
receive one or more initiator-to-responder null data packets (NDPs) (I2R NDPs), wherein the one or more I2R NDPs are sent by the one or more ISTAs participating in the exchange and each I2R NDP is associated with the 2x HE-LTF mode and the 1.6 μs GI;
transmit a ranging NDP announcement (NDPA) frame after a short interframe space (SIFS) time, wherein the ranging NDPA frame is used by the one or more ISTAs after receiving a last HE TB ranging NDP from the one or more ISTAs;
transmit one or more responder-to-initiator NDPs (R2I NDPs), wherein the one or more R2I NDPs are used by the one or more ISTAs participating in the exchange and each R2I NDPs is associated with the 2x HE-LTF mode and the 1.6 μs GI;
receive a measurement feedback from a first ISTA, wherein the measurement feedback includes a time of arrival of an R2I NDP of the one or more R2I NDPs and a time of departure of an I2R NDP of the one or more I2R NDPs, wherein the R2I NDP and the I2R NDP are used to measure a range to the first ISTA; and
determine channel information based on the received HE TB ranging NDPs and the measured ToF.