Wireless Sensor Networks (WSNs) consist of large number of tiny, battery powered sensor nodes with sensing, computation, and wireless communications technologies. These Nodes sense and send their reports towards a centralized node which is called ―sink or base station. This transmission and reception process consumes lots of energy as compared to data processing, all sensor nodes are processed by limited capacity battery resources which are difficult to replace or recharge due to the unsuitable nature of located nodes. Therefore, to increase the life time of the nodes in WSN, the designing of energy aware routing protocol is vital role in WSN to increase the life time of the sensor nodes. An Energy Efficient Routing is a significant issue in the designing of Wireless Sensor Network (WSN) protocols. This paper presents the list of various type of energy efficient routing protocols have been studied having classified them into proper categories.

WSN; EER; LEACH; PEGASIS and DREAM

[1] Akyildiz LF, Su W, Sankarasubramaniam Y, Cayirci E. ―A survey on sensor networks. IEEE Communications Magazine, 40(8): 102~114.Vol.25, No.4, 2002, 114-124.
[2] S.Ranjitha and D. Prabakar and S. Karthik, "A Study on Security issues in Wireless Sensor Networks", International Journal of Computer Sciences and Engineering, Volume-03, Issue-09, Page No (50-53), Sep -2015,
[3] W. R. Heinzelman, A .Chandrakasan, and H. Balakrishnan., Energy-Efficient Communication Protocol for Wireless Microsensor Networks. IEEE. Published in the Proceedings of the Hawaii International Conference on System Sciences, January 4-7
[4] L. T. Nguyen, X. Defago, R. Beuran, Y. Shinoda., An Energy Efficient Routing Scheme for Mobile Wireless Sensor Networks IEEE ISWCS 2008
[5] H. Abusaimeh, S-H Yang., Dynamic Cluster Head for Lifetime Efficiency in WSN International Journal of Automation and Computing 06(1), February 2009, 48-54, 2009 SPRINGER.
[6] S. Lindsey, C. Raghavendra,"PEGASIS: Power-Efficient Gathering in Sensor Information Systems," IEEE Aerospace Conference Proceedings, 2002, Vol.3. No. 9-16, pp. 1125 1130.
[7] Neha Gupta and Balraj S. Sidhu, "Cost Based Energy Efficient Routing Algorithm for Wireless Body Area Networks", International Journal of Computer Sciences and Engineering, Volume-03, Issue-08, Page No (1-5), Aug -2015.
[8] J. Kulik, W. R. Heinzelman, and H. Balakrishnan, "Negotiation-based protocols for disseminating information in wireless sensor networks," Wireless Networks, Volume: 8, pp. 169-185, 2002.
[9] S. Basagni and et. al. A Distance Routing Effect Algorithm for Mobility (DREAM). In ACM/IEEE Int. Conf. on Mobile Computing and Networking ( MobiCom'98), October 1998.
[10] W. Heinzelman, A. Chandrakasan and H. Balakrishnan “Energyefficient communication protocol for wireless microsensor networks”, in Proceedings of the 33rd Hawaii International Conference on System Sciences , Vol. 2, 2000.
[11] E.Kranakis, H.Singh and J.Urrutis. “Compass routing on geometric networks. In proc. 11th Canadian conference on Computational Geometry”, Pages 51- 54, Vancouver, August 1999.
[12] M. Younis, M. Youssef and K. Arisha, “Energy-Aware Routing in Cluster-Based SensorNetworks”, in the Proceedings of the 10th IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS2002), Fort Worth, TX, October 2002.
[13] Wendi Rabiner Heinzelman, Anantha Chandrakasan, and Hari Balakrishnan. “Energy-Efficient Communication Protocol for Wireless Micro sensor Networks”, 33rd Hawaii International Conference on System Sciences, 2000.
[14] Niharika Singh Matharu and Avtar Singh Buttar, "An Efficient Approach for Localization using Trilateration Algorithm based on Received Signal Strength in Wireless Sensor Network", International Journal of Computer Sciences and Engineering, Volume-03, Issue-08, Page No (11-16), Aug -2015