Simplified fast handover in mobile IPv6 networks
The Fast Handovers for Mobile IPv6 (FMIPv6) protocol provides seamless handover; it uses anticipation based on layer 2 trigger information of the mobile node (MN) to obtain a new care-of address at the new link while still connected to the previous link, thus reducing handover delay. A bidirectional tunnel is then established between access routers to minimize packet loss during the handover. However, this method incurs higher signaling costs compared with the standard Mobile IPv6 protocol. In many cases, the mobile node cannot complete the fast handover in predictive mode due to lack of time, especially with high-speed movement of the mobile node. This paper proposes an enhancement to the FMIPv6, the Simplified Fast Handover in Mobile IPv6 Networks (SFMIPv6), which significantly reduces the anticipation time of the fast handover and thereby increases the probability that the protocol can perform the fast handover in predictive mode. In this paper, we also present performance evaluations in terms of the influence of two factors, the break-down point and the velocity of the MN, using evaluation models. The numerical results prove that the network performance of the proposed protocol is effectively improved compared to the original protocols, the FMIPv6 and Fast Handover Support in Hierarchical Mobile IPv6 (F-HMIPv6). Moreover, the results show that the proposed protocol could appropriately operate with high-speed mobile node movement. (C) 2008 Elsevier B.V. All rights reserved.
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