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Stable storage for wireless multi-hop access networks

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3 Author(s)
Ono, M. ; Dept. of Comput. & Syst. Eng., Tokyo Denki Univ., Saitama ; Hirakawa, T. ; Higaki, H.

This paper has proposed a method to realize k-resilient distributed stable storage in a checkpoint protocol for a wireless multi-hop access network. By using the method, state information of a mobile computer is stored into storage devices in neighbor mobile computers and less state information is stored into a stable storage in a base station. Hence, communication and storage overhead are reduced. The method is able to be applied to a 3-phase checkpoint protocol without any additional messages. For further reduction of the overhead, not only 1-hop neighbor but also 2-hop neighbor mobile computers are involved into achieving the distributed stable storages. We design a checkpoint protocol by using the proposed method. In simulation evaluation, only 10-20% storage overhead of a naive method storing all state information into a stable storage in a base station is required. Especially in case of sparser mobile computer distribution and higher failure ratio, our extension involving 2-hop neighbor mobile computers works efficiently for reduction of the overhead

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Wireless and Optical Communications Networks, 2006 IFIP International Conference on

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