Patent ID: 8848565

Claim:
A method of determining a position of a wireless station (STA), the method comprising: exchanging a request (REQ) frame and an acknowledgement (ACK) frame between a first access point (AP) and the STA; determining, in the first AP, a round trip time (RTT) value in response to exchanging the REQ frame and the ACK frame between the first AP and the STA; determining a time of arrival (TOA) of the REQ frame at a second AP and a TOA of the ACK frame at the second AP; determining a time difference of arrival (TDOA) value indicative of the difference between the TOA of the ACK frame and the TOA of the REQ frame; and determining a difference measurement value indicative of a difference between the RTT value and the TDOA value, wherein the first AP and the STA are separated by a first distance, the second AP and the STA are separated by a second distance, and the difference measurement value indicates a difference between the first and the second distances.