Energy-Hole Avoidance for WSN Based on Adjust Transmission Power
Zeng Zhi · Chinese Journal of Computers · 2010
The many-to-one characteristic of the data collection in Wireless Sensor Network(WSN)often leads to high energy consumption in local network,which will result in energy hole problem so as to make the WSN dying prematurely.The paper analyses the characteristics of data distribution in WSN.Some results are obtained from the analysis including the distribution of energy consumptions,the lifetime of each node in different localities and the data transferring delay corresponding to the node's lifetime.Considering the delay requirements in applications,the paper presents the algorithm for maximizing the network lifetime.Furthermore,a scheme is presented according to the correlation among data transfer rate,energy consumption and delay.In the potential energy hole area,the scheme selects data in proper proportion,then transmits those data to the low energy consumption area in order to improve the performance.Theoretical analysis and simulations show that the scheme adapts to the situations of energy consumptions and delays well.Moreover,the network lifetime in the network adopting the scheme can be extended to 17% more than that in other networks without the scheme.