Communications localization system

G - Physics – 01 – S

Patent

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Details

G01S 5/12 (2006.01) G08G 1/01 (2006.01) G08G 1/13 (2006.01) G01S 5/14 (2006.01) H04Q 7/34 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2316170

A method and apparatus for locating a mobile radio communications transceiver in a cellular-telephone or cellular-like communications system use a simplified system for passive monitoring of the signals emitted by the transceiver. Two receiving base stations can determine the timing of signal arrivals from the remote transceiver. This timing information is then combined with collateral, position-sensitive information to determine the likely location of the transceiver. The present invention has particular applicability to roadway transportation in that it facilitates enhanced emergency services and roadside assistance in response to calls for assistance, and it permits the passive monitoring of traffic flow.

Procédé et dispositif pour localiser un poste émetteur-récepteur de radiocommunication mobile dans un système téléphonique cellulaire ou un système de radiocommunication de type cellulaire. Ce procédé et ce dispositif font appel à un système simplifié de surveillance passive des signaux émis par le poste émetteur-récepteur. Deux stations de base réceptrices sont en mesure de déterminer la synchronisation de signaux entrants provenant d'un poste émetteur-récepteur éloigné. Cette information de synchronisation est ensuite combinée avec une information collatérale basée sur la position pour déterminer la localisation probable du poste émetteur-récepteur. Cette invention convient particulièrement aux applications de transports routiers, car elle permet d'améliorer les services d'urgence et l'assistance le long des routes en réponses à des appels à l'aide, et d'assurer une surveillance passive du flux de trafic.

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