A NOde-grouped OFDMA for multi-cluster underwater sensor networks
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In this paper, the NOde-Grouped Orthogonal frequency division multiple access (NOGO) protocol is newly extended, which was proposed as a medium access control (MAC) protocol in single-cluster underwater sensor networks [1]. Unlike NOGO MAC, the extended version can work in multi-cluster architecture, thus we name it multi-cluster NOGO (McNOGO). McNOGO employs two different frequency channels each for uplink and downlink and schedules them alternately on the time axis in such a way that contiguous clusters have a disagreement of up/down scheduling to avoid inter-cluster interference. We evaluate the proposed protocol in terms of the normalized successful throughput using computer simulation.
[1] Ho-Shin Cho,et al. A delay-tolerant OFDMA-based MAC protocol for underwater acoustic sensor networks , 2011, 2011 IEEE Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies.