Abstract: A system and method in a mobile network in which a first router manages a first subnet including at least one second router and the at least one second router manages a second subnet including at least one mobile node. In a method for recovering a routing path between the first router and the at least one mobile node, the first router receives, from the at least one second router, information of neighboring routers included in the first subnet, and stores the received neighboring router information. An occurrence of routing path failure is recognized when a periodic report message is not received from the at least one second router within a preset time. An alternative router is selected from among the neighboring routers when the failure occurrence is recognized, and a routing path recovery request is sent to the alternative router. Data is routed to the at least one mobile node through the alternative router when the alternative router positively responds to the routing path recovery request.

Abstract: A method for optimizing a tunnel between a second mobile router and a home agent of the second mobile router in a mobile network having a nested structure in which a first mobile router manages a subnetwork including at least the second mobile router. The second mobile router manages a subnetwork including at least one node. The second mobile router receives nested path information from the first mobile router. The second mobile router transmits the nested path information to the home agent of the second mobile router via the first mobile router. The home agent of the second mobile router stores the nested path information received from the second mobile router thereby performing tunneling with the second mobile router.