User-Density Dependent Autonomous Clustering in MANET

In large scale mobile ad hoc networks, hierarchical routing by clustering of nodes is effective to reduce the load of routing. Since mobile ad hoc networks is autonomously structured, clustering must be realized in an autonomous manner. In our previous study, we have proposed an autonomous clustering technology, and have shown that stable clustering can be realized even in an environment where nodes move randomly. However, the number of nodes included in a cluster may tend to increase when user density increases like congestion in commuting hours around a train station. In this paper, by autonomously generating cluster-head nodes, we propose an autonomous clustering method. The proposed clustering can give stable cluster size that is adaptive even to dynamic environments where user density changes.