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2. A Routing Algorithm for Wireless Ad Hoc Networks based on Mobility Pattern using Fuzzy Logic concept.

E.J Thomson

Wireless networks allow a more flexible model of communication than traditional networks since the user is not limited to a fixed physical location. Unlike cellular wireless networks, an ad hoc wireless network does not have any fixed communication infrastructure. A mobile ad hoc network is a collection of wireless mobile nodes forming a self-configuring network without using any existing infrastructure. In ad hoc networks, nodes exhibit some degree of regularity in the mobility pattern. By exploiting the node mobility pattern, we can predict the future state of network topology and thus provide a transparent network access during the period of topology changes. This paper advocates the fuzzy logic based scheme for recognizing the mobility pattern followed by the nodes in wireless ad hoc networks. In the fuzzy approach a linguistic variable is introduced for each variable involved in decision. We present enhancements to routing protocols using mobility prediction in this paper. The different patterns of movement of the nodes can be classified into different Mobility Models, each of which is characterized by their own distinctive features. We have explored the influence of three such mobility models deterministic, Column and Random.

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