Lucent Technologies Inc.

American Telephone and Telegraph, Co.

High Point Sarl

Brian David Bolliger

Kenneth Wayne Strom

Kenneth Frank Smolik

Lajeana Nicole Roberts

Douglas Albert Spencer

Talmage P Bursh

Richard Alan Windhausen

Jeffrey Ross Light

Charles Varvaro

Kenneth Yiu-Kwong Ho

Paul Eugene Miller

Talmage P Bursh, Jr

Mark Kevin Stockert

Michel Lee Hearn

Richard Michael Heidebrecht

Alan Stuart Mulberg

Kelvin Ki-Yui Ho

Charles Yeomans Farwell

Richard Dale Miller

Michael Adrian Smith

David Michael Kissel

John Stewart Thompson

Steven Lee Stevens

Marc Kevin Dennison

Michael Jerome English

Charalambos George Constantinides

Lajeana Nicole Robert

John Stuart Thompson

A method and apparatus for determining whether a wireless station is operating within a prescribed geographic location. During an initialization process, the wireless telephone measures propagation delays of pilot signals from nearby base stations and stores the propagation delays in a non-volatile memory of the wireless station. Thereafter, during a check process, the wireless station measures propagation delays of pilot signals from nearby base stations and compares them with the stored propagation delays stored in memory. If the difference between the two sets of propagation delays are within a predetermined tolerance, then a determination is made that the wireless station is operating within the prescribed geographic location. Multiple sets of propagation delays may be stored in memory such that a determination can be made as to whether the mobile station is operating within any one of a number of prescribed geographic locations.

Method and apparatus for determining whether a wireless station is

Growing community of inventors

Naperville, IL, United States of America

Brian David Bolliger