Mobile communication device and communication network for provid

Details Mobile communication device and communication network for provid Mobile communication device and communication network for provid

1998-05-14

2000-05-30

Hunter, Daniel S.

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

455456, 455440, 455524, 455 671, H04Q 720

Patent

active

060700831

ABSTRACT:
A mobile communication system and communication device for providing location services. Time difference of arrival (TDOA) measurements are used to determine the location of a mobile of the network. The location may be forwarded to a service provider. The location may alternatively be used to determine service providers that are local to the mobile. Correction factors deprived from calibration TDOA measurements made at calibration terminals are applied to the TDOA measurements enhance the accuracy of the location determination.

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Kevin J. Krizman, Thomas E. Biedka, and Theodore S. Rappaport, Wireless Position Location: Fundamentals, Implementation Strategies, and Sources of Error, 1997.
Jeffrey H. Reed, Kevin J. Krizman, Brian d. Woener, and Theodore S. Rappaport, An Overview of of Challenges and Progress in Meeting the E-911 Requirement for Location Service, Apr. 1998.
James J. Caffery, Jr. and Gordon L. Stuber, Overview of Radiolocation in CDMA Cellular Systems, Apr. 1998.
Christopher Drane, Malcolm Macnaughtan, and Craig Scott, Positioning GSM Telephones, Apr. 1998.

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