Cellular telephone network routing method and apparatus for...

H - Electricity – 04 – Q

Patent

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H04Q 7/38 (2006.01)

Patent

CA 2257632

The registration notification signal (104) sent to the home cellular system (12) when an internationally roaming cellular mobile station (16(1)) registers in a foreign cellular system (32) includes an identification of the currently serving switching node (34). Upon subsequent receipt of an incoming call dialed to the roaming mobile station home directory number, the home cellular system signals (206) the serving cellular system and a temporary local directory number is assigned (208) and returned to the home cellular system. The switching node identification is then processed to identify the proper international dialing digits (212) for calling the country where the serving switching node is located. The returned temporary local directory number (210) is then appended to the identified international dialing digits to form an international telephone number (214) which is used by the home cellular system to route the received call to the currently serving cellular system for delivery to the called internationally roaming mobile station.

Le signal de notification d'annonce (104) envoyé au système cellulaire local (12) lorsqu'une station mobile cellulaire à portée étendue au plan international (16(1)) s'annonce dans un système cellulaire étranger (32), comporte une identification du noeud de commutation (34) assurant la desserte à ce moment-là. Lors de la réception ultérieure d'un appel entrant numéroté selon le numéro d'appel local de la station mobile à portée étendue, le système cellulaire local le signale (206) au système cellulaire de desserte et un numéro d'appel local provisoire est attribué (208) et renvoyé au système cellulaire local. L'identification du noeud de commutation est ensuite traitée pour identifier les chiffres corrects de l'international automatique (212) en vue d'appeler le pays où est situé le noeud de commutation assurant la desserte. Le numéro d'appel local provisoire renvoyé (210) est ensuite ajouté aux chiffres de l'international automatique identifiés, en vue de former un numéro de téléphone international (214) qui est utilisé par le système cellulaire local pour acheminer l'appel reçu vers le système cellulaire assurant la desserte à ce moment-là, pour transmission à la station mobile à portée étendue au plan international, qui est appelée.

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