Modeling And Analysis For The Lifetime Of Wireless Sensor Networks

Network lifetime is one of the important index of measuring the effectiveness of wireless sensor networks,energy efficiency strategy is a basic method of extend the network lifetime,The model of wireless sensor network lifetime is aimed at analyzing the changes of network lifetime under different energy efficiency strategy and using environment.Through analyzing the power consumption pattern of network node,this paper make a network lifetime model under different models of wireless sensor network.Firstly,According to periodic womode this paper analyzes the energy consumption situation of sensor node based on the clustering wireless sensor network of LEACH agreement,and get approximation distribution of node energy consuming of per unit period by calculating energy consumption mode,and make the lifetime model of single node within the cluster,then it take the rate of survived node as definition of life,and introduces the changes of network lifetime.Secondly,in view of the large scale wireless sensor network this paper established the ring model of network,by improve the network packet sending mechanism nodes in,the probability distribution of number that node transmits data packets is obtained,we obtain the network nodes and under the two definitions of life life model.Finally,simulation results show the validity of the model.