Optimization Study On LEACH Protocol In Wireless Sensor Network

Wireless sensor network(WSN)is a kind of many simple structure of the sensor nodes through ad-hoc network of wireless communication network,in the military aerospace,environmental monitoring,health care and other fields has a great application.Current academic research mainly is routing protocol and MAC layer protocol,which is one of the bottleneck of wireless sensor network.LEACH protocol is the most representative energy saving routing protocol,which improves the energy efficiency of the sensor network to a certain extent and extends the network life.However,with the development of modern wireless sensor network,the classic LEACH protocol can not meet the requirements.To make full use of the node energy,improve the energy efficiency of the whole network,in the cluster head election stages of LEACH agreement,through the sensor node in the cluster head election formula of the current location information of space and residual energy of nodes as clusters factor,effectively avoid the node energy is too low that exist in the classic LEACH algorithm was elected as the problem of cluster heads,and a cluster head is too concentrated,the stability of the agreement in data transmission phase,through the method of multiple hops routing between clusters will transmit one hop distance control in the range of a threshold distance,and through the way of data distribution slow the bear the forwarding of a single cluster head nodes exist the problem of the large amount of data,this paper proposes a new improved LEACH agreement-INP-LEACH,through MATLAB simulation,to verify the effectiveness of the improved protocol to improve the survival time of network nodes,and the service life of the whole network has a relatively large increase.Then,based on the above improved protocol,a new ant colony algorithm is proposed.The core idea of the algorithm: first,the rest of the nodes of the current real-time energy and location information added to the cluster head judgment formula,then,for stable data transmission phase,first through the preliminary judgment for space position relations bligh narrow road forward routing of the mountain range between clusters,and then two types of ants is introduced to determine the optimal transmission between cluster heads a path and suboptimal transmission path,when the optimal path and suboptimal path was determined,by determining the two optimal path to realize the data forwarding tasks,effectively avoid the existing classical ant colony algorithm is easy to out of local optimal solution.Finally,through MATLAB simulation experiment,the improved protocol is proved to improve the network life and so on.