Per-Connection Return Routability Test in Mobile IPv6

As a mobile node switches from one subnet to another, Mobile IPv6 requires that it authenticate the new care of address of the new subnet with the corresponding node. The authentication process, called return routability (RR) test, is required in every handoff and can delay the handoff process by a round trip delay between mobile and corresponding nodes. In this paper, two mechanisms are proposed to reduce the latency involved in RR tests and binding association. They eliminates triangular routing delay in RR tests by using multiple authentication tokens or easily regenerative tokes, so that the round trip delay in performing RR tests can be eliminated.