No abstract

Wireless sensor network is the group of small units called nodes which has gained a lot of light due to its variant applications in various sectors. The tiny mechanical devices referred as sensor nodes are deployed in the very rough area and they are left unattended to uninterruptedly report about the environment parameters .Nodes in rough areas rapidly diminish energy resources, which lead to disruption in network services. This is the main problem of data collection scenarios in which CH's have a huge burden of collecting and relaying statistics. The relay load on heads particularly intensifies as the sink distance decreases. For balancing the load of traffic and the energy consumption in WSN, the CH role must be switched among all the network nodes and the sizes of cluster must be carefully determined at every portion of the network. These devices have energy which is consumed during a long time at processing, gathering, aggregation and transmission of data. So, clustering approach is applied to reduce the consumption of data and give prolonged life to the network. This paper surveyed about the clustering mechanism, its protocols and various issues regarding it. The various parameters of the clustering in WSN are discussed.