SYSTEM AND METHOD TO COMMUNICATE TIME STAMPED, 3-AXIS GEO-POSITION DATA WITHIN TELECOMMUNICATION NETWORKS

摘要

A remote communications apparatus (10) such as a cell telephone is equipped with a satellite position system SPS receiver (26) to acquire location data. The location data is encoded using multiple audio frequency tone encoding (48) such as DTMF for transmission over the voice channel (70) of the telecommunications network (12), including cell CTSS (134) and the PSTN (138) to a call receiver apparatus (14) such as a public safety answering point (PSAP). Location data correction is effected using a fixed antenna (1402) receiving apparatus (1404) and related database (1412), in the network (210) or at the answering point (166) to improve location accuracy. The invention provides advantages of low cost of implmentation, improved location accuracy, and transparent signaling of location data so that simultaneous voice communication is uninterrupted.