Patent ID: 9049625
Filing Date: 2015-06-02
Classification: H04W

Abstract:
1. A route switching method for switching an access router of a second mobile node from a second access router to a third access router, the method comprising: receiving, by the third access router, a context transfer message sent by the second access router, the context transfer message comprising an Internet Protocol (IP)-host address of the second mobile node, an IP-host address of a first mobile node and an IP-routing address of the first mobile node, wherein the first mobile node has an established session connection with the second mobile node; updating, by the third access router, a Cache for Destination Terminal and a Cache for Source Terminal in a cache of the third access router according to the context transfer message, the Cache for Destination Terminal in the cache of the third access router including a mapping relation between the IP-host address of the first mobile node and the IP-routing address of the first mobile node, and the Cache for Source Terminal in the cache of the third access router including a mapping relation between the IP-host address of the second mobile node and an IP-routing address of the second mobile node; performing IP in IP encapsulation, by the third access router, on a data packet when the second mobile node sends the data packet to the first mobile node via the third access router, with the IP-routing address of the first mobile node and the IP-routing address of the second mobile node being a destination address and a source address of an outer encapsulation respectively, and with a location update header being used in an outer IP packet, the location update header indicating the IP-host address and IP-routing address of the second mobile node; and sending the encapsulated data packet to a first access router which is connected to the first mobile node.