Achieving both energy efficiency and quality of data at the same time is a challenging task in wireless sensor networks (WSN). This is very crucial to ensure that the system operates at minimum energy in a WSN. Main objective of this research is to minimize the energy consumption and thereby enhance the network life-time. Energy consumption is very much dependent upon the efficiency of routing protocols. In this paper, a Super Cluster based modified LEACH (Low Energy Adaptive Clustering Hierarchy) protocol has been proposed where an elected Super Cluster head (SCH) takes the charge of routing the gathered data to the base station. The super cluster head is elected among the existing clusters depending upon some weight factors. Weight factors are evaluated based on distance and remaining energy considerations. Simulation results show that the proposed Super Cluster-Head based Modified LEACH protocol effectively produces optimal energy consumption for the wireless sensor networks and thereby results in an extension of life time for the network. In the proposed model, the preparation phase is performed only once before the set-up phase of the first round and the processes of following set-up and steady-state phases in every round are the same as LEACH. The proposed model is compared with an existing LEACH based model and it is found to produce much better result than the existing in terms of energy consumption.

1. M. Shankar, Dr. M. Sridar, and Dr. M. Rajani, 2012 Performance Evaluation of LEACH Protocol in Wireless Network. International Journal of Scientific & Engineering Research, Volume 3, Issue 1, January-2012 1 ISSN 2229-5518.
2. Fu Chunyao, Wei Wei, and Wei Ang,, 2012 Study of an improved algorithm based on LEACH protocol. Information Technology Journal 11(5); 605-612, 2012.
3. A. A. Abbasi, and M. Younis, 2007, A survey on clustering algorithms for wireless sensor networks. Computer Communications, vol. 30, Oct. 2007, pp. 2826–2841.
4. W. Heizelman, A. Chandrakasan, and H. Balakrishman, 2000 Energy efficient routing protocols for wireless micro sensor networks. In Proc 33rd Hawaii International Conferences on System Sciences (HICSS'00).
5. W. Heinzelman, 2000 Application-Specific Protocol Architectures for Wireless Networks. PhD Thesis, MIT, June 2000.
6. Liu, Chuan-Ming, and Chuan-Hsiu Lee, 2005 Distributed algorithms for energy-efficient cluster-head election in wireless mobile sensor networks. Conference on Wireless Networks (ICWN'05), Las Vegas, Nevada, USA, pp: 405-411, June 2005.
7. D. Estrin, R. Govindan, J. Heidemann, and S. Kumar, 1999 Scalable Coordination in Sensor Networks. Proc. Mobicom '99, Seattle, WA, Aug. 1999, pp. 263-270
8. K. Akkaya, and M. Younis, 2005 A survey on routing protocols for wireless sensor networks. Ad Hoc Networks, vol. 3, May 2005, pp. 325–349.

Energy Efficiency Network Life-time Super Cluster Wsn Sch Weight Factor Modified Leach