ISSN : 1796-2021
Volume : 3    Issue : 6    Date : November 2008

An Energy Optimization Protocol Based on Cross-Layer for Wireless Sensor Networks
Yuebin Bai, Shujuan Liu, Mo Sha, Yang Lu, and Cong Xu
Page(s): 27-34
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Survivability is one of the critical issues and the most important research topics in the fields of
wireless sensor networks (WSNs). Energy efficiency is one of the determining factors for
survivability and lifetime of WSNs. In the WSNs, severe energy issue necessitates energy-efficient
approach to fulfill application objectives.
In this paper, we propose an Energy Optimization Approach based on Cross-Layer for Wireless
Sensor Networks named as EOA, which consider the joint optimal design of the physical, medium
access control (MAC), and routing layer. The focus of EOA is on the computation of optimal
transmission power, routing, and duty-cycle schedule that optimize the WSNs energy-efficiency. We
first propose a feedback algorithm that computes the proper transmission power level between
nodes. Then, routing protocol can make use of the transmission power as a metric by choosing
route with optimal power consumption to forward packets. Finally, the cross-layer routing
information is exploited to form a duty-cycle schedule in MAC layer. EOA is validated on a
CROSSBOW’s MicaZ mote platform, and evaluated using the TOSSIM simulator, the simulation
results show that EOA is an energy-efficient approach and able to achieve significant performance
improvement as well.

Index Terms
wireless sensor networks, energy optimization, cross-layer