Abstract: Recent development in the area of micro-sensor devices have accelerated the advances in the sensor networks field leading to many new protocols specifically designed for wireless sensors networks(WSNs).wireless sensors networks with hundreds to thousands of sensor nodes can gather information from an unattended location and transmit the gathered data to a particular users, depending on the applications. These sensor nodes have some constraints due to their limited energy, storage capacity and computing power. Data are routing from one node to other using different routing protocols. There .this paper gives brief idea about different protocols in wireless sensor networks (like LEACH, SEP, HRC etc.) also included comparison of these protocols.

Keywords: WSN, protocols, routing, LEACH, SEP, HRC.