Advanced Triggers for Location-Based Service Applications in a Wireless Location System

摘要

Methods and systems are employed by a wireless location system (WLS) for locating a wireless device operating in a geographic area served by a wireless communications system. An exemplary method includes monitoring a set of signaling links of the wireless communications system, and detecting at least one predefined signaling transaction occurring on at least one of the predefined signaling links. Then, in response to the detection of the at least one predefined network transaction, at least one predefined location service is triggered.

主权项

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 the 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, or contents of messages sent to the MS or from the MS; and 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 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.