Improved Scheme for Enhancing Data Persistence in Wireless Sensor Network

Data persistence is the time interval of effectively disseminating and storing data among nodes to achieve the desire,how to improve the data persistence is a hot-spot in current research.In this paper,an improved scheme for improving data persistence named IIDP is proposed.In the scheme,nodes estimate the number of nodes in the network and the number of data packets by receiving packets for some time,then they can compute the parameter of restoring data and store the data.In order to achieve the store process as quick as possible,nodes adopt a probability-based forwarding scheme that they always transmit a packet to one of their neighbors who receives the packet the least of times.Theoretical analysis and experiments show that IIDP not only can achieve higher data persistence but also can be more energy efficiency than previous schemes.