Packet communication systems

H - Electricity – 04 – W

Patent

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Details

H04W 36/02 (2009.01) H04L 12/56 (2006.01)

Patent

CA 2435163

The present invention provides a packet communication system has a mobile host, a home agent, a correspondent host, and a mobility agent, wherein the mobility agent operates in such a way that in the case of an active mode and no need for buffering of packet, the mobility agent forwards a packet received from the home agent or the correspondent host, to the mobile host, that in the case of the active mode and necessity for buffering of packet, the mobility agent buffers the packet, and that in the case of an idle mode, the mobility agent buffers the packet and notifies the mobile host of arrival of the packet, in order to prevent the loss of a packet addressed to a mobile host, to decrease the traffic of Binding Update packets, to decrease the transmission frequency of Binding Update packets where the mobile host sends or receives no packet for a long period of time, and to send a packet a destination of which is a node present at a mobile network.

L'invention permet d'empêcher la disparition d'un paquet adressé à un hôte mobile, et de réduire le trafic des paquets de mise à jour de liaison et la fréquence de transmission de ces derniers lorsque l'hôte mobile reste sans recevoir/transmettre aucun paquet pendant une longue durée. L'invention concerne un système de communication par paquets qui comprend un hôte mobile, un agent local, un hôte correspondant et un agent mobile, et qui permet de transmettre un paquet adressé à un noeud présent dans un réseau mobile. Selon l'invention, l'agent mobile transfère un paquet reçu de l'agent local ou de l'hôte correspondant à l'hôte mobile si ce dernier se trouve en mode de fonctionnement actif et s'il n'est pas nécessaire de tamponner le paquet ; l'agent mobile tamponne le paquet si l'hôte mobile se trouve en mode actif et qu'il est nécessaire de tamponner le paquet ; et l'agent mobile tamponne le paquet et notifie l'hôte mobile de l'arrivée du paquet lorsque l'hôte mobile se trouve en mode inactif.

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