Patent ID: 7623872

Claim:
In a geographic area served by a wireless communication system having a sparse network overlay geo-location system in which a primary wireless location sensor associated with a serving base station provides information about a signal received from a mobile appliance to another wireless location sensor as to enable the another wireless location sensor to detect and measure an attribute of the signal, a method of locating the mobile appliance independently from the primary wireless location sensor comprising: (a) performing ambiguity function processing at the another wireless location sensor using known data sequences in the signal and the signal received at the another wireless location sensor; (b) extracting a timing advance and determining a surface based on the timing advance; (c) retrieving power measurements at the mobile appliance of an adjacent cell from an Abis monitoring unit and forming location surfaces from the power measurements; (d) performing pattern matching to compare sets of measurement data with sets of predetermined data; (e) performing pseudo-range measurements from timing signals transmitted in radio frequency (“RF”) bands from a forward link transmission, where the RF bands are not the same as the signal; (f) using differential Doppler techniques and fading envelope detection techniques enabling known roadways to be used as surfaces of position for location; and (g) estimating the location of the mobile appliance based at least in part on one or more of steps (a) through (f).