Abstract: For the disadvantages,such as high energy consumption and the energy consumption imbalance in the wireless sensor network,a mobile sink node was introduced and an energy-efficient routing algorithm on mobile sink(MSEERP) was proposed in this paper.In the MSEERP,the network is divided into several square virtual grids,and each grid is called a cluster.The cluster head is selected according to the residual energy of nodes and the weighted sum of the coordinate distance of a node and a cluster center of gravity,which avoids a node of the low residual energy selected as cluster head node.In order to save network energy consumption,the sink node receives data of the cluster head node by controllable moving scheduling strategy.Influence of three parameters,the movement speed of the sink node,the number of the moving sink node and the weighting coefficient α,on the performance of MSEERP algorithm was detailed analyzed by simulation.The results show when the movement speed of the sink node is equal to 5,the weighting coefficient α is 0.6 and the number of mobile sink node is 1,the performance of the MSEERP algorithm is best.The life cycle of the network,the total energy consumption and the total amount of data the sink node receives of the MSEERP algorithm are better than that of GAF and TTDD algorithm.

Key words: Mobile sink,Clustering routing,Energy-efficient,WSN