Research Of WSN Topology Control Algorithm Based On Energy And Connectivity

As an emerging network measurement and control technology, Wireless sensor network is an intelligent network application system that can independently realize data acquisition, fusion and transmission application. Wireless sensor network ties the logical information and the physical world tightly together, and really realizes "the ubiquitous computing" mode. Wireless sensor network has broad application prospect whether in the field of national defense or in the field of national economy.Wireless sensor network’s battery energy is the most precious resource of each node, and how to use energy efficiently to maximize the network life cycle and maintain a continuous supply of energy is an important principle of design. For self-organizing wireless sensor networks, network topology has a great effect on the network’s performance. Good topology structure not only improves the efficiency of routing protocol and MAC protocol, another important goal is to use energy efficiently, prolong the network life time while the network connectivity and coverage is guaranteed.This paper analyzes the various topology control algorithm of WSN in detail, and compares the advantages and disadvantages of each kind of algorithm by synthesis. On the basis of topology control, the paper studies how to use energy efficiently, to prolong the network lifetime as long as possible, and propose the LEACH-N algorithm based on the LEACH algorithm. The improved algorithm improves the LEACH from the aspects of cluster head election, cluster district division and stable communication stage, and gives full consideration of surplus energy, connectivity of the node and other factors. It makes the divided cluster district more equally, balance the network energy consumption and prolong the life cycle of the system. Finally, the paper simulates the two algorithms by using the NS2simulation software. Compare the two algorithms from the aspects of life cycle of network, system overall energy consumption and data volume received by SINK. The results show that the LEACH-N algorithm can save the network energy effectively, prolong the network life cycle, solves the problem of the LEACH algorithm’s low energy utilization ratio in a certain extent, and reaches the purpose of improvement.