• SUDHAKAR CHEKURI
• B N BHANDARI

Wireless Sensor Networks (WSNs) have been an interesting research area for researchers worldwide. Wireless sensor nodes have problems such as low processor capacity, low memory, limited energy. However, sensor nodes have attractive features such as random placement, self-organization, collaboration and local computation; It is used in many fields such as military, environmental, health care and commercial applications. The biggest problem in WSN is energy efficiency. Many studies have been done in this area. In this paper, examined in detail IEEE 802.15.4 protocol used by wireless sensor nodes and the MAC protocols developed for energy efficiency in the datalink layer are presented in detail.

Wireless sensor networks, Nodes, Energy efficiency, IEEE 802.15.4, MAC protocols.

"Overview of MAC Protocols in Wireless Sensor Networks", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 12, page no.e123-e136, December-2021, Available :http://www.jetir.org/papers/JETIR2112416.pdf

"Overview of MAC Protocols in Wireless Sensor Networks", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 12, page no. ppe123-e136, December-2021, Available at : http://www.jetir.org/papers/JETIR2112416.pdf