Abstract
As multichannel medium access control (MAC) protocol has higher network performance, it becomes an important issue in underwater sensor networks (UWSNs). The design of multichannel MAC faces many challenges caused by long-delay, low bandwidth and triple hidden terminal problems. We propose a Distributed Receiver-oriented Adaptive Multichannel MAC (DRAMAC) protocol for UWSNs in this paper. DRAMAC contains two key schemes: channel negotiation process based on cooperative correction (NPCC) and receiver-oriented dynamic channel negotiation strategy (DCNS). NPCC scheme can reduce the probability of collision by using the neighbors cooperation information. DCNS scheme can help select channel according to the packet length and the receivers network load condition. Thus we can improve the performance without any additional devices. The analysis and simulation results show that DRAMAC can achieve higher network throughput, lower end-to-end delay and has better adaptability in distributed environment.
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