Distributed Joint Source-Channel Coding with Raptor Codes for Correlated Data Gathering in Wireless Sensor Networks

Nikos Deligiannis, Evangelos Zimos, Dragos Ofrim, Yiannis Andreopoulos, Adrian Munteanu
<span title="">2014</span> <i title="ICST"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/hdtexni3n5gtbhjgnktdwprk5y" style="color: black;">Proceedings of the 9th International Conference on Body Area Networks</a> </i> &nbsp;
Correlated data gathering in body area networks calls for systems that perform efficient compression and reliable transmission of the measurements, while imposing a small computational burden at the sensors. Highly-efficient compression mechanisms, e.g., adaptive arithmetic entropy encoding, do not address the problem adequately, as they have high computational demands. In this paper, we propose a new distributed joint source-channel coding (DJSCC) solution for this problem. Following the
more &raquo; ... ples of distributed source coding, our design allows for efficient compression and error-resilient transmission while exploiting the correlation amongst sensors' readings at energy-robust sink nodes. In this way, the computational complexity and in turn, the energy consumption at the sensor node is kept to a minimum. Our DJSCC design is based on a new non-systematic Slepian-Wolf Raptor code construction that achieves good performance at short code lengths, which are appropriate for low-rate data gathering within local or body area sensor networks. Experimental results using a WSN deployment for temperature monitoring reveal that, for lossless compression, the proposed system leads to a 30.08% rate reduction against a baseline system that performs adaptive arithmetic entropy encoding of the temperature readings. Moreover, under AWGN and Rayleigh fading channel losses, the proposed system leads to energy savings between 12.19% to 16.51% with respect to the baseline system.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.4108/icst.bodynets.2014.257111">doi:10.4108/icst.bodynets.2014.257111</a> <a target="_blank" rel="external noopener" href="https://dblp.org/rec/conf/bodynets/DeligiannisZOAM14.html">dblp:conf/bodynets/DeligiannisZOAM14</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/dnagfdkelbcyrnkgspjmz7fcoy">fatcat:dnagfdkelbcyrnkgspjmz7fcoy</a> </span>
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