Patent ID: 7840227
Filing Date: 2010-11-23
Classification: H04W

Abstract:
1. A communications system comprising: a plurality of mobile wireless units movably located within a defined space of a wireless local area network; a plurality of fixed access points disposed at known locations in the defined space, each access point operating at a dedicated frequency different from the dedicated frequency of its nearest neighbor access points; a means for tracking movement of at least one mobile unit within the defined space including: a means for assigning the nearby access points with strongest signals at the calibrated location to the selected mobile unit based on the map of relative strengths in the defined space and communicating the dedicated frequencies of the nearby access points to the selected mobile unit; wherein the tracking means tracks the movement of the selected mobile unit by periodically scanning the frequencies of the assigned access points adjacent the calculated location and predicts future locations of the selected mobile unit; wherein the assigning means assigns the nearby access points based on the predicted location of the selected mobile unit and the map; wherein the scanning means only scans the frequencies of the assigned nearby access points.