Method for acquiring an alternate communication system

Details Method for acquiring an alternate communication system Method for acquiring an alternate communication system

H - Electricity

04

B

H04B 17/00 (2006.01) H04Q 7/32 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2303532

A wireless communication device automatically and seamlessly switches to an alternate, available system when it is unable to complete a call origination attempt, without requiring the user to take any affirmative actions to select the alternate system, the wireless communication device stores a list of preferred communication systems. The mobile station attempts to acquire (302) one of these preferred communication systems upon failure of the reverse link (300). If that is not successful (304), the mobile station attempts to acquire (306) a communication system most likely to provide service. If that is also not sucessful (308), the mobile station re-attempts acquisition of the current communication system. The mobile station also re-attempts (310) acquisition with one of the preferred communication systems after a predetermined idle time.

Un dispositif de communication sans fil bascule automatiquement et sans coupure sur un dispositif de secours disponible lorsqu'il est incapable de mener à terme une tentative de position d'appel de départ sans demander à l'utilisateur de prendre une quelconque décision positive pour sélectionner le système de secours. Le dispositif de communication sans fil conserve en mémoire une liste des systèmes de communication préférés. La station mobile tente d'entrer (302) dans un des systèmes de communication préférés lorsque la liaison de retour (300) est défaillante. Si cette tentative est infructueuse (304), la station mobile tente d'entrer (306) dans le système de communication qui est le plus susceptible d'assurer le service. Si cette tentative est également infructueuse (308), la station mobile tente à nouveau d'entrer dans le système de communication normal. La station mobile essaie (310) à nouveau d'entrer dans un des systèmes de communication préférés après un temps mort prédéterminé.

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