International Journal of Modern Engineering Research (IJMER)
A wireless sensor network is a collection of sensor nodes that have some properties like low cost, low power, limited network lifetime etc. These sensor nodes are deployed to the region of interest (area monitoring, air pollution monitoring, forest fire detection, water quality monitoring etc.) for gathering data. An important issue in wireless sensor networks is developing an energy-efficient routing protocol to increase the network lifetime of the network. Routing protocols can be divided on many basis either it is network structure or protocol operation. On the basis of network structure routing protocols can be further divided into three parts (flat, clustering-based and location-aware).