Abstract
Providing a reliable group communication in a mobile ad hoc network (MANET) is a challenging task. The dynamic nature of this network makes it highly unreliable. Moreover, the future MANETs such as military applications are so large that the disaster recovery scenes would become unmanageable. For better utilization of the system, nodes within the close proximity need to communicate with each other quite often than those which are far apart. To address these issues and to provide a reliable and manageable group communication, this paper proposes a novel token circulation scheme using an adaptive secondary clusterhead-aided clustering algorithm. The token circulation scheme handles token loss and node failures, while the clustering algorithm provides variable diameter clusters, within which group communication is provided. The primary clusterhead is chosen according to the connection degree and mobility of each node. A secondary clusterhead is also set inside each cluster to take charge of part of the duties of the primary clusterhead, such as clustering functionalities, storage of information relating to clustering, token monitoring, etc. Criteria for comparing the algorithms with the existing algorithms include the average time required to complete a round, number of bytes sent per round, number of nodes visited per round, member change frequency in clusters and rate of change of clusterheads. Simulation results show that the proposed token circulation scheme in combination with the clustering algorithm gives better results in comparison with the existing schemes.
Published Version
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