Systems and Methods for Room-Level Location Using WiFi

摘要

A method of identifying a location of a mobile device in a building includes identifying non-overlapping regions in a building. A server collects base station signal strength measurements at a plurality of distinct points in the building, with at least one point in each region. The server trains region classifiers for each region. Each region classifier is configured to compute a probability estimate that the test point is inside the region, using inputs that are signal strength differences. The server receives signal strength measurements from the base stations, taken by a mobile device at an unknown point. The server computes differences in signal strengths between pairs of base stations, and applies the region classifiers to the signal strength differences, thereby estimating the region where the mobile device is located. The server then transmits the estimated region to a user.

主权项

1. A method of identifying a location of a mobile device in a building, performed at a server having one or more processors and memory, the method comprising:
receiving base station signal strength measurements taken at a plurality of distinct points in the building, wherein the signals are received from a plurality of radio-transmitting base stations in the building, the building is partitioned into a plurality of regions, and at least one respective point of the distinct points is in each of the respective regions; and training a respective region classifier for each respective region, wherein each region classifier is configured to compute a probability estimate that a test point is inside the respective region, the computation using inputs that are differences between signal strength measurements taken at the test point for signals received from the base stations.