Patent ID: 7272138

Claim:
A method for providing mobility comprising the steps of: transferring an anchor point from a first entity of a wireless network to a second entity of the wireless network during an active session between an access terminal and a peer entity in the wireless network, wherein the access terminal communicates with the peer entity through the anchor point during the active session, and wherein the anchor point is at the first entity before the step of transferring, comprising setting up the anchor point at the second entity; transmitting a first OSPF link state advertisement stating that packets with a first destination address of the anchor point can be sent to the second entity at a first nominally low cost, the first nominally low cost being lower than current nominally high cost of routing the packets with the first destination address to the first entity; transmitting a second OSPF link state advertisement stating that packets with the first destination address of the anchor point and packets with a second destination address of the anchor point should no longer be routed to the first entity; transmitting a third OSPF link state advertisement stating that the packets with the second destination address can be sent to the second entity at a second nominally low cost, the second nominally low cost being lower than a nominally high cost of routing the packets with the second destination address to the first entity; and transmitting a fourth OSPF link state advertisement stating that the packets with the first and second destination addresses can be sent to the second entity at a nominally high cost, wherein the step of transmitting the fourth OSPF link state advertisement is performed after propagation of routes for delivering the packets with the first and second destination addresses at the first and second nominally low costs.