Methods and apparatus for home address management at home...

H - Electricity – 04 – L

Patent

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Details

H04L 29/06 (2006.01) H04L 12/56 (2006.01) H04L 29/12 (2006.01)

Patent

CA 2502063

The present invention provides methods and apparatus for managing an IP address assigned to a Mobile Node. In one embodiment, the Mobile Node appends an extension to the registration request that is sent to its Home Agent, which indicates that the Mobile Node requests use of the IP address previously assigned to the Mobile Node for an additional period of time. When the Home Agent receives the registration request, it indicates whether a lease on the IP address previously assigned to the Mobile Node has been granted by the Home Agent for an additional period of time. In another embodiment, the Home Agent sends a first control message to determine whether the Mobile Node continues to use the IP address. The Home Agent then determines whether a second control message has been received in order to ascertain whether the Mobile Node continues to use the IP address previously assigned to the Mobile Node. The present invention is preferably performed when a Mobile Node returns to its home network, thereby enabling the Mobile Node to retain the IP address assigned to it.

La présente invention concerne des procédés et un appareil de gestion d'une adresse IP affectée à un noeud mobile. Selon un mode de réalisation, le noeud mobile ajoute une extension à la demande d'enregistrement qui est envoyée à son agent local, laquelle indique que le noeud mobile demande l'utilisation de l'adresse IP préalablement affectée au noeud mobile pour une durée supplémentaire. Lorsque l'agent local reçoit la demande d'enregistrement, il indique si une cession sur l'adresse IP préalablement affectée au noeud mobile a été accordée par l'agent local pour une durée supplémentaire. Selon un autre mode de réalisation, l'agent local envoie un premier message de commande afin de déterminer si le noeud mobile continue à utiliser l'adresse IP. L'agent local détermine ensuite si un second message de commande a été reçu de manière à déterminer si le noeud mobile continu à utiliser l'adresse IP préalablement affectée au noeud mobile. La présente invention est de préférence mise en oeuvre lorsqu'un noeud mobile retourne vers son réseau domestique, ce qui permet ainsi au noeud mobile de retenir l'adresse IP qui lui est affectée.

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