Abstract: Without infrastructure, Mobile Ad Hoc Network(MANET)is a kind of self-organized and dynamic wireless communication network that is lack of any centralized control. These characteristics make it vulnerable to communication continuity and security attack. Comparing with traditional network, MANET has great limitation in network reliability. Many researches have been focused on two main factors of reliability or reliability modcl,which influence the reliability of MANET. Therefore, this paper proposed a multiple dimensional reliability model, which considers both movement and security attack, for MANET.Furthermore, the experimental analysis of the model was given. According to the result of experimental analysis, the key factor of MANET reliability was presented.

Key words: MANET,Reliability model,Movement model,Security model