Patent ID: 7920875
Filing Date: 2011-04-05
Classification: G01S,G03G,H04W

Abstract:
1. A method for locating a wireless device, comprising: (a) providing, to a location processing node, key information for one or more base station transmitters of one or more wireless communications networks, wherein said key information includes at least one of cell identification information, transmitter location information, signal timing information, signal transmit power information, and signal propagation information; (b) at a wireless device to be located, measuring signals transmitted by said one or more base station transmitters; (c) communicating information representative of said signal measurements via a communication link to said location processing node, wherein said communication link is not provided by said one or more wireless communications networks, and wherein said signal measurements include at least one of signal time of arrival (TOA) measurements, signal time difference of arrival (TDOA) measurements, and power level measurements; and (d) at said location processing node, computing the location of the wireless device to be located, wherein the wireless device is located using downlink signal measurements made by the wireless device and without consuming communication resources of the one or more wireless communications networks.