Patent ID: 7720059
Filing Date: 2010-05-18
Classification: H04W

Abstract:
1. A method of exchanging traffic for a mobile node in a mobile network, the method comprising: upon receiving a request from a mobile node connected to a first router using a first dynamic address and having received a link layer signal from an access point connected to a second router, the first router provides network information of the second router to the mobile node as an acknowledgment to the request from the mobile node; receiving second dynamic address of the mobile node by the first and second routers using the network information of the second router; first buffering a packet headed for the first dynamic address by the first router; confirming whether or not the second dynamic address is available by the second router; executing a fast binding update of the mobile node using the second dynamic address and delivering a fast binding update complete message to the first router upon a determination by the second router that the second dynamic address is available; transmitting the packet buffered by the first router from the first router to the second router as an acknowledgment to the fast binding update complete message, and delivering a Flush message to the second buffer upon the packet buffered by the first router being completely transmitted to the second router; second buffering the packet transmitted from the first router by the second router; receiving and third buffering a packet headed for the second dynamic address by the second router; delivering the packet buffered by the second buffering from the second router to the mobile node as an acknowledgment to a delivered movement complete message indicating the movement of the mobile node from the first router to the second router; and delivering the packet buffered by the third buffering from the second router to the mobile node upon receiving the Flush message, wherein the Flush message comprises: a source address field storing an address of the first router; a destination address field storing the second dynamic address; a mobile header area (mobile HDR) field storing the next header information; and a MN's Previous Local CoA (PLCoA) field storing the previous dynamic address.