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| 基于可变长时隙机制的水下传感器网络MAC协议 | |
| 引用本文： | 田志辉,金志刚,王颖.基于可变长时隙机制的水下传感器网络MAC协议[J].计算机应用,2014,34(7):1947-1950. |
| 作者姓名： | 田志辉 金志刚 王颖 |
| 作者单位： | 1. 天津大学 电子信息工程学院，天津 300072 2. 61660部队，北京 100089 |
| 基金项目： | 国家自然科学基金资助项目;青海省科技计划项目;海南省应用技术研究与开发专项 |
| 摘 要： | 通过研究水声通信的特点，分析水下物体的运动特性，提出了一种基于可变长时隙机制的水下传感器网络MAC协议。新协议中，传感器节点会周期性获取邻居节点的位置信息，并根据节点间相互距离的变化自适应地调整信道预约时隙长度，当节点由于运动引起网络区域收缩，节点之间距离变小时，预约时隙长度变小，反之，时隙长度增大。可变长时隙机制，提高了信道时隙资源的利用率。仿真结果表明，动态环境下新协议相对现有的协议在有效网络吞吐量性能上提升15%左右。 |
| 收稿时间： | 2014-01-14 |
| 修稿时间： | 2014-02-28 |
Variable-length slot based MAC for underwater wireless sensor networks |
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| TIAN Zhihui JIN Zhigang WANG Ying.Variable-length slot based MAC for underwater wireless sensor networks[J].journal of Computer Applications,2014,34(7):1947-1950. | |
| Authors: | TIAN Zhihui JIN Zhigang WANG Ying |
| Affiliation: | 1. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China; 2. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China 3. Unit 61660, Beijing 100089, China |
| Abstract: | A motion model of underwater sensor node was analyzed, and a new Medium Access Control (MAC) protocol of underwater mobile sensor networks based on variable-length slots: VS FAMA was proposed. In VS FAMA, the length of time-slot would be adaptive adjusted according to sensor location that measured periodically, which was positively correlated to the distance between nodes. New protocol made better use of the time-slot resource in underwater sensor networks. NS-2 simulation results show that VS FAMA can get about 15% higher network goodput under the circumstance of motion. |
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