Patent ID: 6393292
Filing Date: 2002-05-21
Classification: H04W

Abstract:
A method of transmitting position data via cellular communication system, comprising the steps of:(a) generating a position data by a position producer; (b) sending said position data to a mobile station from said position producer; (c) attaching said position data to a location registration data stream by (i) encoding said position data during a signal processing to form coded data, wherein a common ciphering scheme is applied to said coded position data; (ii) modulating said coded data including said position data during said signal processing, wherein said modulation scheme is a GMSK (Gaussian-filtered Minimum Shift Keying) modulation; (iii) converting said coded data which is a registry data stream as well as said position data into analog transmit signals; (iv) amplifying said analog transmit signal; and (v) broadcasting said analog transmit signal from said mobile station; (d) sending said position data along with a location registration data stream to a base station from said mobile station so as to inform which area does said mobile station currently reside in; and (e) retrieving said position data by said base station.