Patent ID: 8009631
Filing Date: 2011-08-30
Classification: H04L,H04W

Abstract:
1. A method in a network for forwarding IP packets sent to a mobile node via an old care-of-address of the mobile node, following a handover of the mobile node from a first node to a second node, the first node and the second node being a first access router and a second access router respectively, the method comprising: prior to completion of said handover, the first node determining a new care-of-address for the mobile node for when the mobile node is transferred to the second node; causing the first node to assume that the mobile node is stationary; the mobile node sending a notification to the node or a proxy node from a new link attached to the second node, the first node or the proxy node confirming the timeliness of the notification prior to forwarding packets to the new care-of-address by using a nonce periodically sent by the first node and echoed back in the notification; at said first node, determining the new care-of-address for the mobile node and confirming ownership of the new care-of-address by the mobile node; and subsequently forwarding packets received at said first node, destined for said old care-of-address, to the new care-of-address.