Method and system for fast handover in hierarchical mobile IPv6

A fast handover method for Hierarchical Mobile IPv6, comprising:

• transmitting, by a mobile node, a proxy route request message to a previous access router of the mobile node, according to a handover expectation provided by a link layer;
• generating, by the mobile node, a new care-of address, according to network prefix information of a new access router of the mobile node transmitted from the previous access router;
• wherein the network prefix information of the new access router is transmitted from the previous access router upon the previous access router receiving the proxy route request message;
• transmitting, by the mobile node, a local binding update message to a mobility anchor point of the mobile node before the mobile node moves to a target network with the new access router, wherein the local binding update message comprises a current link address and the new care-of address of the mobile node;
• transmitting, from the mobility anchor point, a binding acknowledge message to the mobile node in response to receiving the local binding update message transmitted from the mobile node;
• transmitting the binding acknowledge message to a previous link address where the mobile node originated and the current link address simultaneously;
• and
• performing, by the mobile node, an optimistic duplicate address detection on the new care-of address, after the mobile node moves to the target network, wherein a Success state carried in the binding acknowledge message by the mobile node indicates successful handover of the mobile node.