Patent ID: 8175057

Claim:
A method for managing the movement of a mobile node moving from a first network to a second network, wherein the mobile node communicates with a corresponding node by exchanging data packets, the data packets being routed by a first router and a second router, the first router and the second router being associated respectively with the first network and the second network, and said mobile node having a first IP address configured with a subnet prefix belonging to the first network, and wherein a second subnet prefix belongs to the second network, the second subnet prefix being different from the subnet prefix belonging to the first network, said method comprising the following steps: receiving, by the first router, first information on a departure of the mobile node from the first network, setting, by the first router, upon receiving the first information, a first forwarding rule according to which data packets addressed to the first IP address of the mobile node are to be forwarded to at least one neighbouring router of the first router, the at least one neighbouring router being located in at least one neighbouring network of the first network, transmitting, by the first router, the subnet prefix of the first IP address of the mobile node to the at least one neighbouring router, receiving, by the second router, second information on an arrival of the mobile node in the second network, setting, by the second router, upon the arrival of the mobile node in the second network, a second forwarding rule according to which data packets addressed to the first IP address of the mobile node and arriving at the second router are to be delivered to the mobile node over a wireless network interface of the second router, and transmitting, by the second router, a router advertisement message over the wireless network interface to the mobile node, the router advertisement message comprising the subnet prefix of the first IP address.