Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-04-18
2006-04-18
Appiah, Charles N. (Department: 2686)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456500, C455S404200, C455S067110, C342S457000
Reexamination Certificate
active
07031722
ABSTRACT:
The present invention is directed to a method for locating a mobile station, comprising the steps of using fixed transmitting stations for locating a target mobile station by transmitting a measurement signal from each fixed transmitting station to the mobile station, using a relay station which is adapted to receive the measurement signal from the corresponding fixed transmitting station and to forward the signal to the target mobile station, in case a direct transmission from one or more of the fixed transmitting stations is not available, and determining the distance between the target mobile station to the fixed transmitting stations and/or the relay stations on the basis of the measurement signal, and locating the position of the target mobile station on the basis of the determined distances. By this method, it is possible to locate a mobile station even if there is no direct connection via air to neighbouring base stations.
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Universal Mobile Telecommunications System (UMTS); UMTI Terrestrial Radio Access (UTRA); Concept evaluation (UMTS 30.06 version 3.0.0); European Telecommunication Standard Institute. Dec. 1997 p. 144-173.
Appiah Charles N.
Fox Bryan
Squire Sanders & Dempsey L.L.P.
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