Snoop-and-shortcut routing method for better mobility...

Details Snoop-and-shortcut routing method for better mobility... Snoop-and-shortcut routing method for better mobility...

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 12/46 (2006.01) H04L 12/66 (2006.01)

Patent

CA 2413528

A shortcut routing method to improve packet routing between a visiting mobile host connected to a subnet and a communicating host on the network or the same subnet. When a router receives an IP tunnel packet from a network interface on the visited network, it checks the inner IP packet for its final destination. If the destination IP address of the inner IP packet can be reached from the same network interface, the router decapsulates the IP tunnel packet and sends the inner IP packet directly to the communicating host on the subnet. For every outbound IP packet sent to the communicating host by the visiting mobile host, a portion of the round trip between the mobile host and home agent, is thereby eliminated. Optionally, the router can shortcut IP packets sent from the communicating host to the visiting mobile host, as the visiting host remains on the same subnet as the communicating host.

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