Research And Improvement Of WSN Routing Protocol Based On LEACH And HEED

Wireless Sensor Networks(WSN),as a new network application technology,was known as the 21 st century will affect the world's top ten technology,because of it's important role.The wireless sensor network senses,collects and processes the physical information of the monitoring area and sends the information back to the console by sowing the sensor node with wireless communication capability in the monitoring area.Due to the characteristics of low power consumption,low cost,distributed and self-organization,wireless sensor networks are widely used in military,aviation,explosion prevention,disaster relief,environment,medical care,health care,home,industry and commercial fields.Because in the application of wireless sensor networks,tens of thousands of sensor nodes are scattered in the inaccessible monitoring area,the sensor nodes are usually powered by the battery and the sensor node deployment is difficult to complete the battery replacement,once the node energy Exhausted,it will lose its role and too many nodes will lead to failure of the network failure,so the node energy is extremely valuable.Therefore,it is important for us to study efficient,energy-saving,can extend the network life cycle of the network protocol.Then,the paper introduces the classical routing protocol LEACH protocol,studies the protocol principle,network structure,energy model,cluster head election,clustering,data transmission and so on.Finally,it simulates the operation of the simulation software and summarizes the advantages of LEACH and disadvantages.Then,based on the improvement of LEACH protocol,an energy efficient routing algorithm based on double cluster head is proposed.The routing algorithm divides the sensor nodes into a certain area,improves the cluster head election algorithm,uses the double cluster head to coordinate the working mechanism,and uses the single hop and multihop routing mechanism among the clusters.And the simulation experiment is designed.The results show that the improved protocol has obvious improvement in cluster partition,cluster head election,energy balance and network life cycle.Finally,based on another kind of classical clustering routing algorithm HEED protocol,an improved algorithm combining data fusion is proposed.The algorithm optimizes the cluster head election algorithm and improves the robustness from node density,node location and network Several aspects of the size of the improved algorithm to prove the superiority.