A Survey of various Sink Mobility based Techniques in Wireless Sensor Network

Abstract

Mobility of nodes plays a key role in Wireless sensor network (WSN). It comes up with challenges like energy efficiency and improve network lifetime. WSN contain nodes which are having capability of sensing, computation, and wireless communications. Every node has ability to communicate with other node or Base Station (BS). Sensor nodes have limited energy as compared to BS. Energy efficiency is very important in WSN, because sensor node cannot provide energy for long time while sensing and processing data in network. For this reason mobile sink is rich in energy supply and computational power. Mobile sink can be used to improve the performance of network by shifting the load of energy depletion from sensor node to sink. The effective way to increase the network lifetime is to reposition the sink node. It also helps to reduce energy-holes problems. It is necessary to keep track of mobile sink so that data distribution should take place correctly. But tracking the location of mobile sink and updating it frequently is also a challenge for energy conservation and it affects the network performance. Various sink mobility strategies exist to increase energy efficiency. This paper mainly focuses on study of different algorithms, which are used for efficient data processing using mobile sink.