  One of the major challenges in design of Wireless Sensor Networks (WSNs) is
to reduce energy consumption of sensor nodes to prolong lifetime of
finite-capacity batteries. In this paper, we propose Energy-efficient Adaptive
Scheme for Transmission (EAST) in WSNs. EAST is an IEEE 802.15.4 standard
compliant. In this scheme, open-loop is used for temperature-aware link quality
estimation and compensation. Whereas, closed-loop feedback process helps to
divide network into three logical regions to minimize overhead of control
packets. Threshold on transmitter power loss (RSSIloss) and current number of
nodes (nc(t)) in each region help to adapt transmit power level (Plevel)
according to link quality changes due to temperature variation. Evaluation of
propose scheme is done by considering mobile sensor nodes and reference node
both static and mobile. Simulation results show that propose scheme effectively
adapts transmission Plevel to changing link quality with less control packets
overhead and energy consumption as compared to classical approach with single
region in which maximum transmitter Plevel assigned to compensate temperature
variation.
