Patent ID: 9237546
Filing Date: 2016-01-12
CPC Classification: G01S,H04W

Claim Text:
1. A system comprising: a transmitter configured to a receiver configured to receive, in response to the transmitter transmitting the first frame, a second frame at the first access point from the first device on the predetermined frequency channel during the predetermined time slot, wherein the second frame is also received by the second device and the third device; a timing module configured to generate timing information including (i) a time of departure of the first frame from the first access point, and (ii) a time of arrival of the second frame at the first access point; a feedback module configured to receive feedback information at the first access point from the second device and the third device including times of arrival of the first frame and the second frame at the second device and the third device; and a location determining module configured to determine, at the first access point, the location of the first device based on (i) the timing information; (ii) the feedback information; and (iii) the predetermined locations of the first access point, the second device, and the third device.