Method and apparatus for inter-exchange handoff taking into...

H - Electricity – 04 – Q

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H04Q 7/38 (2006.01)

Patent

CA 2272088

A cellular telephone network (10) includes plural areas (32) each having a plurality of cells (12); the cells individually supporting certain service capabilities. Inter-exchange messaging (60, 64, 70, 72) is provided for distributing from a second exchange to a first exchange information on the service capabilities supported by a cell serviced by the second exchange. Using the distributed service capability information, the first exchange may identify (116), in the context of a potential inter-exchange hand-off, whether to request (118) that cells serviced by the second exchange be instructed to make verification signal strength measurements (124). Furthermore, responsive to received verification signal strength measurement reports (126), the first exchange screens (130) candidate cells based on the distributed service capability information to select an appropriate target cell served by the second exchange for hand-off.

La présente invention concerne un réseau téléphonique cellulaire (10) desservant plusieurs zones (32) toutes découpées en plusieurs cellules (12), les différentes cellules pouvant être caractérisées par des possibilités de service différentes. On a donc mis en place une messagerie inter-centraux (60, 64, 70, 72) permettant de distribuer d'un deuxième central à un premier central des informations sur les possibilités de service admises pour une cellule desservie par le deuxième central. Grâce aux informations distribuées concernant les possibilités de service, le premier central peut vérifier (116), dans l'éventualité d'un transfert inter-centraux, s'il y a lieu de demander (118) que les cellules desservies par le deuxième central reçoivent l'instruction de faire des mesures (124) de vérification de la force du signal. Enfin, au vu des comptes rendus (126) de mesures de vérification de la force du signal, le premier central (130) vérifie (130), pour les cellules candidates, les informations distribuées concernant les possibilités de service afin de sélectionner une cellule cible appropriée desservie par le deuxième central concerné par le transfert.

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