An optimization of adaptive transmission with guarantee connection degree for wireless sensor networks

In this paper, an optimization of adaptive transmission with guarantee connection degree of nodes for wireless sensor networks is proposed. The proposed optimization realizes a novel approach to topology control based a power-adaptation scheme. According to the density of deployed nodes, an expected connection degree of nodes and the operational condition are derived. Afterward, the transmission power is adapted to the minimum strength but is sufficient to guarantee node degrees. The benefits of the proposed approach include the reduction and the equalization of power dissipation in nodes. The proposal is applied on a hierarchical network composed of node clusters to manage transmission distances of nodes in a cluster. The present approach guarantees each pair of nodes in a cluster to be connected. The simulation results are obtained in case of uniform-distribution node deployment. The error, defined as the difference of the actual connection degree of nodes and the expected, is around 10%. Besides, the error decreases as the expected connection degree of nodes increasing. The evidence shows that the proposed approach is reliable and stable.