US 12,335,909 B2
Methods and apparatus for Wi-Fi ranging protocol enhancement with reduced throughput impact
Rishabh Raj, Jamshedpur (IN); Ravindra Chauhan, Chennai (IN); and Xiaoxin Zhang, Sunnyvale, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jul. 2, 2021, as Appl. No. 17/366,984.
Claims priority of provisional application 63/060,330, filed on Aug. 3, 2020.
Prior Publication US 2022/0039058 A1, Feb. 3, 2022
Int. Cl. H04W 64/00 (2009.01); H04W 12/03 (2021.01); H04W 24/10 (2009.01); H04W 56/00 (2009.01)
CPC H04W 64/006 (2013.01) [H04W 12/03 (2021.01); H04W 24/10 (2013.01); H04W 56/009 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method performed by a first wireless communication device for ranging, comprising:
transmitting a ranging request for a ranging procedure to a second wireless communication device;
receiving a first message from the second wireless communication device based at least in part on the transmitted ranging request, the first message comprising an encrypted first data frame having a first preamble and a first data payload;
transmitting a first response message to the second wireless communication device in response to the first message;
receiving a second message from the second wireless communication device, the second message comprising an encrypted second data frame having a second preamble and a second data payload, wherein ranging measurement information for the first message and the first response message is encapsulated in the second data payload of the encrypted second data frame, and wherein the encrypted second data frame comprises a carrier frequency offset (CFO) field having a clock offset; and
estimating a range between the first wireless communication device and the second wireless communication device based at least in part on the ranging measurement information and the clock offset.