A Search Of Topology Invulnerability Based On Wireless Sensor Network Routing Of Damage For Point

Invulnerability assessment is an important index to measure the performance of wireless sensor network in the application of wireless sensor network.This paper focuses on the point of damage for wireless sensor network routing topology invulnerability.LEACH network topology is described and analyzed.In order to further improve the invulnerability of wireless sensor network on the base of analysising LEACH algorithm network topology.We design two improved algorithms.The one is that the base station selecting the cluster head,and the other is that cluster units selecting cluster head.Both of them are based on the location-based energy-aware routing(GAF)algorithm.In both improved algorithms,some little anchor nodes are placed in a sensor network in the node positioning,anchor nodes use the technology of Global Positioning System(GPS),and most ordinary nodes are positioned according to the anchor nodes location.In determining the number of units in a cluster and cluster unit distribution,we take into account the difference in the signal among the sensor nodes,cluster head node,and the base station transmission loss.According to the distribution of the actual parameters and sensor network nodes and other information,we calculate the optimal cluster number of units,replace the cluster unit set proportion subjective LEACH,thereby setting the number of units of the cluster approach,while using time division multiple access and code division multiple access(TDMA/CDMA)the MAC layer(MAC)mechanism reduces cluster conflict within and between clusters.In the cluster head selection,this article describes two methods.The corresponding value of each sensor node 2d is found,the value of each cluster node T_ithat is the largest unit in the cluster head node as its cluster unit is selected,and inform the cluster units cluster member node.We need to consider the base station according to the first node to a neighbor node form the cluster ijD,the remaining energy of node named Ecurrent,the initial energy of the current node named Start_Energy,the distance between current node to its cluster head named d.By the simulation software of OMNET++,we set the same parameters among the two improved algorithms and LEACH algorithm with the same information as as the initial energy of traditional,network nodes,and the information of network node throwing.Comparing the differences of them on network lifetime and network damage invulnerability,we find the algorithm of base station selecting cluster head has no significant effect on the survival time on the network,but the network-oriented point of invulnerability damage is improved.We also confirmed that the algorithm of cluster units selecting cluster head prolongs the survival time of wireless sensor networks,wireless sensor networks also increased the damage for the point of invulnerability.