Review paper on various clustering protocols used in Wireless Sensor Network (WSN)

In recent development, the use of Wireless Sensor Network (WSN) to handle more complex functions is increasing drastically which in turns requires their powered battery sensors to efficiently utilise their energy in order to prolong the network lifetime for the heterogeneous nodes. Clustering is one of the techniques used to optimise this energy consumption and increasing the network lifetime as well. In recent years, many clustering protocols have been proposed based on heterogeneity like SEP,LEACH,E-LEACH etc .In these protocols, a Cluster Head (CH) is selected having maximum energy among all the nodes. This paper will survey some of these clustering protocols for heterogeneous wireless sensor network.