L. Wang and S.S. Kulkarni (USA)
Sensor networks, Forward error correction, Data dissemination
One of the problems in network reprogramming is to guar antee 100 percent delivery of a large amount of data (the en tire binary image) in a lossy wireless channel. All the ex isting protocols on network reprogramming [1–6] use auto matic repeat request (ARQ) scheme to recover from packet losses. We propose a new reliability scheme which is a hy brid approach of forward error correction (FEC) and ARQ. We perform a case study on MNP, a multihop network repro gramming protocol, and study the effect of adding two differ ent FEC codes: simple XOR code and Reed-Solomon (RS) codes [7], to MNP. We evaluate the new reliability approach using TOSSIM. The simulation results show that adding sim ple XOR code to MNP can achieve up to 10% improvement on reprogramming speed and up to 18% reduction on active radio time (the major part of energy consumption). And we show that RS codes perform even better.
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