INTER-AP DISTANCE ESTIMATION USING CROWD SOURCING

摘要

Techniques are provided for utilizing one or more mobile devices to estimate distances between wireless access points (APs). Embodiments can, for example, enable mobile devices, wireless APs, and/or other systems to estimate a distance between two wireless APs using Round-Trip Time (RTT) measurements obtained by one or more mobile devices. The RTT measurements can be utilized based on whether one or more related Received Signal Strength Indication (RSSI) measurements exceed a threshold value. Embodiments can also utilize crowdsourcing to obtain distance estimation data (e.g., distance estimates, RTT and/or RSSI measurements, etc.) from one or more mobile devices and/or propagate a determined distance, based on the distance estimation data, to multiple devices.

主权项

1. A method for providing an estimated distance between a first wireless access point and a second wireless access point using a mobile device, the method comprising:
obtaining, with the mobile device, a plurality of data sets, wherein each data set of the plurality of data sets includes data regarding:
a first Round-Trip Time (RTT) value relating to a distance between the mobile device and the first wireless access point; anda second RTT value relating to a distance between the mobile device and the second wireless access point; determining the estimated distance between the first wireless access point and the second wireless access point by:
determining a first data set having a lowest first RTT value of any data set of the plurality of data sets;determining the second RTT value in the first data set; andestimating the distance between the first wireless access point and the second wireless access point by subtracting a processing delay from the second RTT value in the first data set; and sending, with the mobile device, the estimated distance between the first wireless access point and the second wireless access point.