Energy—efficient protocols should be designed to prolong the network’S lifetime because of the finite energy of nodes in the wireless sensor networks.Based on the analysis of LEACH

a novel scheme of routing protocol called LEACH-W is presented in this paper.It takes the dmes of cluster-heads selected

the remaining energy and the position of the sensor node into account when calculating the threshold of cluster-head selection.The results of experiments show that the proposed system has a longer network’s lifetime