A Framework for Energy-Consumption-Based Design Space Exploration for Wireless Sensor Nodes

Dept. of Electr. Eng., Indian Inst. of Technol., New Delhi
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems (Impact Factor: 1.2). 08/2009; DOI: 10.1109/TCAD.2009.2018865
Source: IEEE Xplore

ABSTRACT In this paper, we first establish that, in wireless sensor networks, operating over ldquosmallrdquo distances, both computation energy and radio energy influence the battery life. In such a scenario, to evaluate the utility of error-correcting codes (ECCs) from an energy perspective, one has to consider the energy consumed in encoding-decoding and transmitting additional ldquoredundantrdquo bits vis-a-vis the energy saved due to coding gain. This paper presents a framework for evaluating various ECCs based on a comprehensive energy model of a sensor node. The framework supports exploration of sensor node design space with application- and deployment-related parameters, like distance, bit error rate, path loss exponent, as well as the modulation scheme and ECC parameters. The exploration results show that, as compared to the uncoded-data transmission, the energy-optimal ECC saves 15%-60% node energy for the given parameters.

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