A Lifetime Extended Routing Protocol Based on Data Threshold in Wireless Sensor Networks

Recently in order to improve the longevity and energy efficiency of WSN (Wireless Sensor Network), widely research have been carried on. Up to the present, many presented methods are based on clustering hierarchical structure. Nevertheless, these protocols don't consider the problem of data sensibility. Based on cluster hierarchical structure, we propose a routing protocol through which each node verifies the sensed data value whether it exceeds certain threshold before transmitting data. By this way, it can obviously reduce the transmission energy consumption in many ways. We use the concepts of basic value (Bv) and changed rate (Cr) to control the data threshold. According to the difference of cluster head election algorithms, we implement two types of scheme: the protocol based on centralized cluster head election algorithm (LEBDT-C) and the protocol based on distributed algorithm (LEDBT). We evaluated the performance of our proposed protocol and concluded this protocol outperformed existing protocols in terms of energy dissipation and longevity of the network.