Seamless handoff system and method

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/38 (2006.01) H04Q 7/22 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2269798

A multicellular communications system where transmission between a roving subscriber and multiple base station transceivers is maintained throughout the territory. Each mobile subscriber unit has global code seeds for the entire communications system or an updated neighbor list and continuously searches to access available cell base stations while maintaining a communication link with one base station. Candidate cell base stations are interrogated and communicated with. The candidate base station that requires less transmitting energy from the mobile subscriber unit is closely monitored. When the mobile subscriber unit can successfully communicate with less transmit power than currently required by the present base station, the mobile subscriber unit is handed off to the candidate base station transceiver.

La présente invention concerne un système de communications multicellulaire dans lequel on maintient une transmission entre un abonné itinérant et plusieurs émetteurs-récepteurs de station de base, à travers le territoire. Chaque unité mobile d'abonné possède des germes de code global pour la totalité du système de communications ou une liste de voisinage mise à jour et cherche à accéder, de manière continue, aux stations de base cellulaires disponibles tout en maintenant une liaison de communications avec une station de base. On interroge et on communique avec les stations de base cellulaires candidates. On surveille étroitement la station de base candidate qui requiert moins d'énergie émettrice en provenance de l'unité mobile d'abonné. Lorsque l'unité mobile d'abonné peut communiquer avec succès avec moins de puissance d'émission que nécessaire actuellement pour la présente station de base, l'unité mobile d'abonné est transférée à l'émetteur-récepteur de la station de base candidate.

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