Research On WSN Survivability Based On Complex Network Theory

Wireless sensor network has the advantages of low power consumption,self-organization,low cost and large area deployment,which makes it widely used in military positioning,agricultural monitoring,industrial monitoring,biomedicine and intelligent transportation.Wireless sensor network node energy depletion or hardware itself failure,encounter external intrusion,will result in the overall network connectivity and coverage decline,and even lead to connectivity of the network topology.So it is very important to improve the survivability of wireless sensor network to guarantee the normal and continuous service of the network.Based on the study of complex network theory,this paper proposes the construction method of HRBA evolution model for PRBA and hierarchical WSN,which are oriented to plane WSN and WSN respectively,aiming at the problem that WSN scale-free evolution model is less resistant to intentional attack.In the process of constructing PRBA evolution model,considering the degree of nodes and the residual energy and the transmission radius.In order to achieve the intention of PRBA attack has a high anti-destructive intent,through the introduction of random edges,reduce the proportion of nodes with height value.The construction of HRBA evolution model is combined with the characteristics of hierarchical WSN itself.In the original scale-free model to improve the connection is divided into random connections and preference for the connection,when the new node selects a random connection,in the local search cluster head node to connect,reducing the proportion of nodes with high degree cluster values,So as to achieve the purpose of intentional attack with high survivability.In the end,this paper simulated the evolution model of PRBA and HRBA with Gephi,a complex network simulation software.Simulation results show that WSN constructed based on PRBA and HRBA evolution model can reduce the proportion of nodes with the height value in the whole network,and improve the survivability of the whole WSN.At the same time,WSN constructed based on PRBA and HRBA evolution model also has the property of scale-free network,and also shows robustness to random attack.