The Study Of Wireless Sensor Network Routing Protocol Based On Modified Particle Swarm Optimizaiton

Wireless Sensor Network (WSN) is a current research focus in the IT industry, has broad application prospects and great commercial potential, and has been widely used in many fields. However, the energy, storage, computing and communication of WSN nodes are all extremely limited, and therefore the primary design goal of WSN routing protocols is to conserve energy and prolong network life cycle. This paper focuses on classic hierarchical routing protocol-LEACH does a lot of improvement. First, this paper proposed a new optimization algorithm which improved the PSO, and integrated optimization of the fitness function. Its application in the process of cluster heads selection, in order to reduce the node energy consumption. Then in data transmission phase, it built multipath transmission by combining single jump and jump, combining balanced whole network energy consumption. The research content of this paper as follow:(1) The PSO may appear the phenomenon such as backward and detours, it makes the convergence rate of the particles slower and even no convergence. For the problem, this paper proposed a particle swarm optimization based on error correction mechanism, and improved the inertia factor and learning factor. It made searching ability of the algorithm stronger and prevented the algorithm into local optimization. The performance of the algorithm is validated through three standard test functions.(2) On the basis of LEACH protocol, the MPSO algorithm is applied to the cluster head election of the routing protocol. Its high performance made the node energy consumption more effectively. And it optimized fitness function by some factors which include the candidate cluster heads of residual energy, the distance between nodes, and the distance between base stations. It reduced the energy consumption and prolonged the network life cycle. When the data is transferred in data transmission phase, it built routing utility function of multipath transmission. Long distance cluster head to transmit data through energy enough and close to the base station cluster heads. Combining the single jump and jump can ensure the energy of WSN.(3)Finally, it experiment and simulation with MATALB. It compared the average energy consumption, node number, and network life cycle with LEACH protocol, WSN routing protocol based on PSO. The experimental results show that the protocol of this paper prolonged the network life cycle. And the average energy consumption of this paper’s protocol is less when the network running the same round. The number of live nodes was more. Results show that the protocol compared to others has better performance. It is feasible.