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In this paper, the authors investigate the effect of packet size selection on the performance of Media Access Control (MAC) protocols for underwater wireless sensor networks, namely, Carrier Sense Multiple Access (CSMA) and the Distance-Aware Collision Avoidance Protocol (DACAP). Their comparative analysis, conducted via ns-2 simulations, considers scenarios with varying, nonzero Bit Error Rate (BER) and interference. They investigate metrics such as throughput efficiency (the ratio between the delivered bit rate and the offered bit rate), end-to-end packet latency, measured "Per meter" to allow for different sizes of deployment areas, and the energy consumed to correctly deliver an information bit to the network collection point.
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