Method and apparatus for a source-initiated handoff from a...

H - Electricity – 04 – W

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H04W 36/14 (2009.01) H04W 84/12 (2009.01) H04W 92/02 (2009.01)

Patent

CA 2512864

To address the need for an apparatus and method for handoff from a cellular wireless network to a non-cellular wireless network (WLAN, e.g.), the present application describes an access gateway (214) and a dual mode mobile station (201) that enable such handoffs. Dual mode MSs can determine when a handoff to a non-cellular network is preferred and request a handin (302) from the non- cellular network. The access gateway provides information to the MS (304) so that it can initiate a handoff through the serving cellular network. Triggering handoffs in this manner, allows cellular networks to handle handoffs to non-cellular networks in much the same way they handle inter-MSC handoffs today, i.e., source initiated.

Pour satisfaire la nécessité de disposer d'un appareil et d'un procédé de transfert d'un réseau cellulaire sans fil à un réseau non cellulaire sans fil (WLAN par exemple), la présente demande décrit une passerelle d'accès (214) et une station mobile bi-mode (201) permettant de tels transferts. Des stations mobiles MS bi-mode peuvent déterminer à quel moment un transfert vers un réseau non cellulaire est préféré et demander une transmission (302) en provenance du réseau non cellulaire. La passerelle d'accès fournit des informations à la MS (304) de manière qu'elle peut déclencher un transfert à travers le réseau cellulaire de prise en charge. Le déclenchement des transferts de cette manière permet aux réseaux cellulaires de traiter des transferts vers des réseaux non cellulaires essentiellement de la même manière qu'ils traitent aujourd'hui des transferts inter-MSC, c'est-à-dire déclenchés par la source.

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