| Summary: | 碩士 === 國立臺灣科技大學 === 資訊管理系 === 93 === Because Mobile Ad Hoc Network(MANET) does not need any infrastructure to support, it can be applied in many environments. In order to increase system performance, data caching is a useful technique. In MANET we need a better caching policy to further improve system performance. Mobile Computing caching policy may not be applicable to MANET. Because Mobile Computing environments is client server model, they communicate with each other using single hop. In MANET nodes communicate with each other using multihop relay. Therefore in MANET it need using cooperative caching concept to design caching policy. Cooperative caching concept, node share cache memory space with each other to further improve system performance. Cooperative caching techniques designed for wired network may not be applicable to ad hoc networks. Since in MANET mobile node move freely, it is unstable environments. Therefore we need design cooperative caching policy to further improve system performance in MANET.
Because relative cooperative caching policy does not consider node leave energy. When we design caching policy, if we do not consider energy then it may be overuse some node. Therefore some node may die early and it may lead to reduce complete networks function time. That means it will reduce network life time. Therefore we propose caching policy that consider node energy to avoid overusing some node in order to prolong the network life time. Simulation result shows that the method we propose can prolong network life time and reduce query delay and increase data accessibility.
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