| Summary: | 碩士 === 淡江大學 === 資訊工程學系資訊網路與通訊碩士班 === 99 === Network environment in underwater acoustic networks, acoustic signal transmission as a tool. But the sound propagation speed (1500 m / s) much lower than the speed of light (3 * 108 m / s), so compared to the data transmission using electromagnetic waves, high propagation delay will cause the sonar transmission environment huge impact. Particularly in the use of four-way handshaking mechanism to achieve collision avoidance medium access protocol, not only increases the data transmission delay itself, but also a waste of control packets and control packets between the unused bandwidth. Four handshake mechanism in order to improve the efficiency in the water, this paper presents a handshake-based media access control protocol, a transmission mechanism for adding additional, effective use of control packets and the waiting time between control packets increase get the opportunity to transfer data to improve overall network performance.
Finally, according to the experimental results, we proposed a high efficiency in the performance of medium access control protocol has better performance.
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