Energy – Efficient MAC Protocol (EE-MAC Protocol)
Garima Bhardwaj1, Vasudha Vashishtha2

1Garima Bhardwaj- Assistant Professor in CSE department at Lord Krishna College Of Engineering, Ghaziabad, Uttar Pradesh.
2Vasudha Vashishtha- Assistant Professor in CSE department at Lingaya’s University, Faridabad, Uttar Pradesh.
Manuscript received on January 01, 2013. | Revised Manuscript received on January 02, 2013. | Manuscript published on January 05, 2013. | PP: 271-275 | Volume-2, Issue-6, January 2013. | Retrieval Number: F1177112612/2013©BEIESP
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Abstract: Because of the difficulty in recharging or replacing the batteries of each node in a Wireless Sensor Network, the energy efficiency of the system is a major issue in the area of network design. Other critical parameters such as delay, adaptability to traffic conditions, scalability, system fairness, and throughput and bandwidth utilization are mostly dealt as secondary objectives. Some sensor network applications adopt IEEE 802.11-like MAC protocol, which is however, not a good solution for sensor network applications because it suffers from energy inefficiency problem. The adaptive Sensor-MAC (S-MAC) proposes enhanced schemes such as periodic sleep and overhearing avoidance to provide a better choice for different sensor network applications. In this research paper we propose an energy efficient MAC (EE-MAC) protocol, which is based on adaptive S-MAC with added transmission power control techniques. The main contribution of our work is to introduce a controlled power transmission of RTS, CTS, DATA and ACK frames according to the adaptive S-MAC protocol. We simulate our proposed protocol i.e., EE-MAC protocol using ns-2.33 simulator for two parameters energy consumption and throughput, for determining the behavior of the proposed protocol. The simulation results show that our proposed EE-MAC protocol performs better than adaptive S-MAC protocol in terms of energy consumption and throughput.
Keywords: IEEE802.11, S-Mac Protocol, Transmission Power Control, Wireless Sensor Network