SEARCH AREA REDUCTION FOR ESTIMATING LOCATION OF WIRELESS TERMINAL BASED ON INDOOR DETECTION

摘要

PROBLEM TO BE SOLVED: To provide a method of using a non-GPS-derived technology to estimate a location of an Assisted-GPS-enabled wireless terminal for the purpose of generating location-specific assistance data for the wireless terminal. SOLUTION: The wireless terminal uses the assistance data to acquire and process one or a plurality of GPS signals and derive information that is probative of the location of the wireless terminal. The GPS-derived location information is then combined with a non-GPS-derived location to form the estimate of the location of the wireless terminal that is more favorable than the case that it can be derived from either the GPS or non-GPS alone. This combination of GPS-derived and non-GPS technologies is particularly useful when the wireless terminal can only acquire one or two GPS signals because it is impossible to determine the location of the wireless terminal by only two GPS signals. COPYRIGHT: (C)2011,JPO&INPIT