E2MAC: An Energy-Efficient MAC protocol for wireless sensor networks

Wireless sensor networks applications witnessed a substantial growth in different fields like industry, security, medicine and military fields. Energy efficiency is one of the most important aspects in wireless sensor networks MAC protocols design. This is due to the fact that in many applications reaching the nodes frequently to change their batteries is not feasible. This paper proposes a new MAC protocol called Energy-Efficient MAC (E²MAC) focuses mainly on achieving good performance in packet delay and packet delivery rate while being operated on very low level of energy consumption. E²MAC is designed based on a previously defined MAC protocol called LPEAS with the addition of adaptive wakeup time and next awake node first packet scheduling features. We compare the performance of IEEE 802.15.4, TMAC and LPEAS with E²MAC. The results show that E²MAC exhibits superior performance particularly in dense/high load networks.