Methods for employing location information associated with emergency calls in wireless communication networks

摘要

The present invention relates to systems and methods to locate and recover stolen vehicles by determining the location information of a stolen vehicle and instructing a theft detection device to perform certain instructions. The system employs multiple radio direction finding (RDF) devices, which is capable of determining the angle of arrival of a radio signal. The MSC sends a request along with radio information to a location processor, which controls the RDF devices. The location processor sets up each RDF device to track the radio signal. If at least two RDF devices are successful in tracking the radio signals and returning information about the radio signals, then the location processor can determine the location of the radiotelephone by using a triangulation method. The system also employs a theft detection device, which is capable of placing a wireless telephone call to a monitoring center. The theft detection device connects to and receives instructions from the monitoring center.