Research On Routing Protocols For Mobile Ad Hoc Network Based On Small-world Theory

The small-world phenomenon is the feature of large number of networks in nature and technology, the small-world model has two eigenvalues: characteristic path length and clustering coefficient. The small-world theory is developing rapidly, it has been applied in many fields. Research has shown that the Mobile Ad Hoc Network has the characteristics of the small-world network. The Mobile Ad Hoc Network is a very potential network, and that the routing protocol is the core study of the Mobile Ad Hoc Network, DSR protocol is one kind of reactive routing protocols, the protocol has the problems that large routing overhead and not timely route discovery caused by flooding, so we propose a strategy for optimizing the routing protocol. In the end, do the simulation by the NS2 simulation software and the optimized strategy is validated available. The main contents of this paper are shown as follows.⑴We have done research on the Mobile Ad Hoc Network and the small-world networks, research existing has shown that the Mobile Ad Hoc Network has the characteristics of the small-world network, so we consider optimizing the routing protocols of the Mobile Ad Hoc Network by the small-world theory.⑵Study the routing protocols for the Mobile Ad Hoc Network, especially on-demand protocols, an analysis and study of the features of DSR protocol is made, for the large routing overhead and not timely route discovery problems, the thought of optimizing DSR protocol is proposed.⑶After an analysis of the operating mechanisms of the DSR protocol is done, the optimization strategy of the route discovery and the route maintenance of the DSR protocol is given out and the specific processes of the optimized DSR protocol are also given out. The optimization strategy can be summarized as: limit the scope to explore,step by step to explore.⑷The optimized DSR protocol is simulated by using the NS2 simulation software. After an analysis of the performance curve of the simulation, then the feasibility and validity of the optimized protocol is validated by analyzing its capability curve.