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An Adaptive Load Control Scheme in Hierarchical Mobile IPv6 Networks  

Pack Sang heon (서울대학교 전기컴퓨터공학과 멀티미디어 통신 연구실)
Kwon Tae kyoung (서울대학교 전기컴퓨터공학과 멀티미디어 통신 연구실)
Choi Yang hee (서울대학교 전기컴퓨터공학과 멀티미디어 통신 연구실)
Abstract
In Hierarchical Mobile Ipv6 (HMIPv6) networks, the mobility anchor point (MAP) handles binding update (BU) procedures locally to reduce signaling overhead for mobility. However, as the number of mobile nodes (MNs) handled by the MAP increases, the MAP suffers from the overhead not only to handle signaling traffic but also to Process data tunneling traffic. Therefore, it is important to control the number of MNs serviced by the MAP, in order to mitigate the burden of the MAP. We propose an adaptive load control scheme, which consists of two sub-algorithms: threshold-based admission control algorithm and session-to-mobility ratio (SMR) based replacement algorithm. When the number of MNs at a MAP reaches to the full capacity, the MAP replaces an existing MN at the MAP, whose SMR is high, with an MN that just requests binding update. The replaced MN is redirected to its home agent. We analyze the proposed load control scheme using the .Markov chain model in terms of the new MN and the ongoing MN blocking probabilities. Numerical results indicate that the above probabilities are lowered significantly compared to the threshold-based admission control alone.
Keywords
Hierarchical Mobile Ipv6; Load Control; Performance analysis; Markov chain.;
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