碩士 / 國立臺灣海洋大學 / 資訊工程學系 / 97 / Compared with traditional terrestrial radio transmissions inWireless Sensor Networks (WSN), the features of transmissions in UnderWater Sensor Networks (UWSN) include lower transmission rate, longer delay time, and higher power consumption. In such a circumstance, the negative effects of transmission collisions deteriorate. Most of the existing UWSN MAC protocols handle the collision problem in a single hop or light-loaded environment. They fail to function effectively in a multi-hop network consisting of more sensor nodes with heavier traffic loads. Using the concept of cyclic quorum systems, we propose a distributed multiple rendezvous multichannel MAC protocol, MM-MAC, in this paper to reduce collision probability. The advantages of the proposed protocol are threefold: 1) Only one modem is
needed for each node to solve the missing receiver problem which is often encountered in multichannel protocols. 2) Multiple sensor node pairs can complete their channel negotiations on different channels simultaneously. 3) After successful channel negotiations, the data packets sent by sensor nodes are collision-free.Simulation results verify that our protocol can reduce collision probability significantly which enhances the network performance and conserves more energy in a multi-hop UWSN.
| Identifer | oai:union.ndltd.org:TW/097NTOU5392014 |
| Date | January 2009 |
| Creators | Yao-Zong Wang, 汪耀宗 |
| Contributors | Chih-Min Chao, 趙志民 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 40 |
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