• VISHAKHA
• kanika sharma

Abstract : Wireless Sensor Networks consists of various nodes of small size that are easy to install and extend in a very low cost. With advent in technology WSNs are being used in variety of applications such as healthcare, security, transportation, environmental applications. The main challenge faced in certain applications for deployment of WSNs in areas where human intervention is not possible is the non-replaceable and non-rechargeable nature of the battery. For this energy efficient protocols called MAC protocols are used to minimize the factors that cause wastage of energy like Idle listening, overhearing, packet collision, over emitting and maintaining metrics like delay, throughput, adaptability etc. So, MAC protocols help in regulating access of nodes to the transmission channel to decrease power consumption and hence increase the lifetime of the network. In this paper different MAC protocols are reviewed and are analyzed on the basis of technique used in the design of MAC protocol, findings and also the research gaps. This review gives a deep insight to the different MAC protocols that are designed over a time and also presents a comparison between state-of-the-art MAC protocols.

Wireless Sensor Network; energy efficient MAC; network lifetime; collision avoidance;

"A Review on Energy Efficient MAC Protocols in Wireless Sensor Network", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.607-611, July-2018, Available :http://www.jetir.org/papers/JETIR1807548.pdf

"A Review on Energy Efficient MAC Protocols in Wireless Sensor Network", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp607-611, July-2018, Available at : http://www.jetir.org/papers/JETIR1807548.pdf