Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-01-23
2007-01-23
Appiah, Charles N (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S434000, C455S435100, C455S433000, C370S338000
Reexamination Certificate
active
10463608
ABSTRACT:
A method, system, and apparatus are provided for detecting a position of a terminal in a network accurately without a GPS receiver. In one example, a method for locating a position of a terminal includes calculating a position of a base station; detecting a clock time difference between the base station and another base station; measuring a reception timing of a signal received by the base station from the terminal; and locating the position of the terminal using at least the position of the base station, the clock time difference, and the reception timing.
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Xinrong, Li et al., “Comparison of Indoor Geolocation Methods in DSSS and OFDM Wireless LAN Systems”, VTC, 2000, pp. 3015-3020.
Doi Nobukazu
Ogino Atsushi
Shida Masaaki
Suzuki Hideya
Tsunehara Katsuhiko
A. Marquez, Esq. Juan Carlos
Appiah Charles N
Fisher Esq. Stanley P.
Hitachi , Ltd.
Peaches Randy
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