Patent ID: 9288628
Filing Date: 2016-03-15
CPC Classification: G01S,H04W

Claim Text:
1. A method for use in a wireless location system (WLS) that estimates the geographic location of a mobile station (MS), comprising: passively monitoring communications between at least one base transceiver station (BTS) and at least one base station controller (BSC) of a wireless communications system, wherein the step of passively monitoring comprises monitoring communications such that the operation of said MS and said wireless communications system are unaffected by said monitoring; extracting MS information from the monitored communications, wherein the extracted MS information comprises at least one of: a mobile station identification (MSID), a called number dialed by the user of the MS, and contents of messages sent to the MS or from the MS; using the extracted MS information to trigger location processing; and initiating at least one predefined location service; wherein said at least one predefined location service comprises at least one of: (1) the use of plural location measuring units (LMUs) and one or more of: an uplink time difference of arrival (TDOA) algorithm, an uplink angle of arrival (AoA) algorithm, or hybrid TDOA and AoA algorithms; and (2) the use of a radio network monitor (RNM) and at least one of a cell global identity (CGI)-based location method or a cell global identity plus timing advance (CGI+TA) location method for determining the geographic location of said MS.