• Sujitha S
• Thanuja I.K

: Energy conservation is one of the primary goals for majority of Medium Access control (MAC) protocols designed for wireless sensor networks. The major sources of energy wastage are idle listening, collision, overhearing, and control packet overhead. In the previous protocol, Advertisement based MAC protocol (A-MAC) an energy-efficient and robust Intra-cluster and Inter-cluster communication protocol was proposed for large scale Wireless Sensor Networks (WSNs) and mainly focused on the communication between Cluster Head (CH) and the Base Station (BS). The communication between the CH-BS could be accomplished with traditional Medium Access Control (MAC) protocols such as Time Division Multiple Access (TDMA) or Carrier Sensing Multiple Access (CSMA). While protocols such as TDMA work well in some situations, they do not work well when the number of clusters is large and the traffic load between the CH-BS is low and they allocate a large amount of time for CH-BS communication but A-MAC is more efficient than traditional MAC protocols which lowers the delay and improves the network capacity by reducing the CH-BS communication time. In this project, a new MAC protocol for the deployment of relay nodes is proposed for maximizing the network lifetime in WSNs. Since in the A-MAC the relay node placement positions are chosen randomly an enhancement has been made in this paper such that a traffic aware scheme for the deployment of relay nodes is also included. The network simulator (NS-2) is used for the simulation. From the simulation results it is observed that the enhancement in the A-MAC protocol performs better when compared with A-MAC.

Wireless Sensor Networks (WSNs), Cluster Head (CH), Base Station (BS), sensor nodes, relay nodes.

"A NEW MAC WITH TRAFFIC AWARE RELAY NODE DEPLOYMENT FOR CLUSTER COMMUNICATION IN WIRELESS SENSOR NETWORKS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.49-55, January-2019, Available :http://www.jetir.org/papers/JETIR1901B08.pdf

"A NEW MAC WITH TRAFFIC AWARE RELAY NODE DEPLOYMENT FOR CLUSTER COMMUNICATION IN WIRELESS SENSOR NETWORKS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp49-55, January-2019, Available at : http://www.jetir.org/papers/JETIR1901B08.pdf