US Patent No. 11,032,787


Patent No. 11,032,787
Issue Date June 08, 2021
Title Basic Service Set (bss) Color In Null Data Packet (ndp) Ranging
Inventorship Liwen Chu, San Ramon, CA (US)
Christian Berger, San Jose, CA (US)
Niranjan Grandhe, San Jose, CA (US)
Hongyuan Zhang, Fremont, CA (US)
Hui-Ling Lou, Sunnyvale, CA (US)
Assignee NXP USA, INC., Austin, TX (US)

Claim of US Patent No. 11,032,787

1. A method, comprising:determining, at a communication device, an identifier of a wireless network with which the communication device is not associated;
while the communication device is not associated with the wireless network, participating, by the communication device, in a ranging procedure with an access point (AP) of the wireless network, wherein:
the ranging procedure is for estimating a distance between the communication device and the AP based on measuring times of flight of transmissions between the communication device and the AP, and
participating in the ranging procedure includes: transmitting, by the communication device, a packet to the AP as part of the ranging procedure, wherein the packet includes a physical layer (PHY) preamble, wherein the PHY preamble includes a signal field, wherein the signal field includes a wireless network identifier subfield set to the identifier of the wireless network, and wherein the identifier of the wireless network comprises a basic service set (BSS) color identifier of a BSS of the wireless network being managed by the AP.