Wireless Sensor Network (WSN) nodes are widely
used in various sectors nowadays. WSN nodes
experience a lot of problems that impact on battery life for sensor node such as, overhearing, collision,hidden node, idle listening, schedule drifts, and high latency. Moreover, WSN nodes are strongly dependent on its limited battery power, and replenishing it again is difficult as nodes are deployed in an ad-hoc manner.Energy consumption is the most important factor to determine the life of a sensor network because
usually sensor nodes are driven by low battery
resources. An approach to conserve energy in WSN
nodes is to carefully design its Medium Access
Control (MAC) protocol. Several previous work
has been carried out to mitigate many problems that impact on battery life for sensor node such as overhearing, collision, and hidden node. This paper attempts to design Energy-Efficient MAC (EEMAC), a hybrid energy-efficient protocol to
address the energy issues that are related to WSNs
nodes.This protocol aims to reduce idle listening
times as well as lowering the latency time thus
reducing the energy consumption.The proposed protocol has been developed and analyzed using the
ns-2 Simulator.A mathematical model was used to
prove the efficiency of the proposed protocol. We
have compared our proposed EE-MAC protocol
with the existing contention-based IEEE 802.11
PSM protocol.The simulation results illustrate that the EE-MAC has achieved better energy
conservation than the IEEE 802.11 PSM protocol
