SYSTEMS AND METHODS OF OFFLOADED POSITIONING FOR DETERMINING LOCATION OF WLAN NODES

摘要

This disclosure includes systems and methods for determining the location of each of a plurality of STAs of a WLAN where an AP measures the round-trip time (RTT) and the angle of arrival (AOA) to each STA from implicit packet exchange, such as data frame and ACK frame. The AP may then report the RTT and AOA measurements to each STA using a dedicated beacon information element (IE) which multicasts RTT and AOA measurements to the STAs. By employing an additional parameter, namely, angle of arrival AOA, a single AP may compute the two-dimensional location of each associated STA. Further, another beacon IE may multicast mapping of the AIDs to MAC addresses so that the associated STAs can understand such mapping for STAs in a network so that one STA may know the location of other STAs. Encryption may be employed to achieve privacy.

主权项

1. In a wireless communications network having an access point and at least one station associated with the access point, a method of determining a location of the at least one station comprising:
determining with the access point a round trip time (RTT) of a wireless transmission including a first implicit frame sent from the access point to the at least one station and a second implicit frame sent from the at least one station to the access point; determining with the access point an angle of arrival (AOA) of a wireless transmission including a first implicit frame sent from the at least one station to the access point; and multicasting with the access point location information including the determined RTT and the determined AOA for the at least one station.