Abstract
In this paper, we first establish that, in wireless sensor networks, operating over "small" 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 "redundant" bits vis-à-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 applicationand 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1017-1024 |
| Number of pages | 8 |
| Journal | IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems |
| Volume | 28 |
| Issue number | 1 |
| State | Published - Jan 2009 |
| Externally published | Yes |
Keywords
- Communication systems
- Design methodology
- Energy management
- Error correction coding
- Modeling