Multiple mobile ip sessions with dynamically allocated home...

Details Multiple mobile ip sessions with dynamically allocated home... Multiple mobile ip sessions with dynamically allocated home...

H - Electricity

04

L

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

Patent

CA 2470628

A system, method and node for supporting multiple IP sessions with dynamically allocated home IP addresses in a CDMA2000 network. When the Home Agent (HA) receives a registration request from a Mobile Node (MN), it verifies if there are any mobility bindings for the MN. If yes, the HA verifies if the MN's care- of address equals one it already stores. If not, the HA verifies if the home IP address in the request is zero, and if no refreshes the mobility binding. However, if the IP address is zero, the HA verifies if the MN has reached its session number limit, and if so, the HA keeps only the first session and removes the others, but if no, the HA creates a new mobile IP session. The proper home IP address is the returned to the MN.

L'invention concerne un système, un procédé et un noeud permettant de traiter plusieurs sessions IP comprenant des adresses IP locales attribuées dynamiquement dans un réseau CDMA2000. Lorsque l'agent local (HA) reçoit une demande d'inscription provenant d'un noeud mobile (MN), il vérifie s'il existe des associations de mobilité pour ce noeud mobile. En cas de réponse positive, l'agent local vérifie si l'adresse de destination du noeud mobile correspond à l'une des adresses déjà mises en mémoire. En cas de réponse négative, l'agent local vérifie si l'adresse IP locale figurant dans la demande est nulle; si cela n'est pas le cas, il rafraîchit l'association de mobilité. Toutefois, si l'adresse IP est nulle, l'agent local vérifie si le noeud mobile a atteint le nombre limite de sessions; si tel est le cas, il ne conserve que la première session et élimine les autres; dans le cas contraire, l'agent local crée une nouvelle session IP mobile. L'adresse IP locale appropriée est renvoyée au noeud mobile.

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