Abstract:To address the additional service quality requirements of wireless sensor networks, a scale-free fault-tolerance topology control algorithm is proposed. The algorithm constructs the scale-free topology that satisfies the additional optimum required for the lifecycle and interference services. First, the coupling relationship between the topological degree distribution and its performance on both lifecycle and interference is analyzed. Then, the degree distribution with the optimal requirement of lifecycle and interference services is determined. Furthermore, the scale-free topology control algorithm based on the preference attachment rule is proposed to construct the scale-free topology with optimal degree distribution. Finally, the scale-free topology fulfilling the optimum of both lifecycle and interference is also obtained. The theoretical analysis and simulation results show that the presented scale-free topology control algorithm can assure the strong fault-tolerance, and improve the lifecycle and interference services simultaneously.