基于NS2的水声通信信道的扩展与仿真  

Extension and Simulation of Underwater Acoustic Communication Channel Based on NS2

作　　者：张亚斌[1] 刘建明[1] 李宏周[1] 彭智勇[1] 

机构地区：[1]桂林电子科技大学计算机科学与工程学院,广西桂林541004

出　　处：《计算机仿真》2012年第7期163-167,共5页Computer Simulation

基　　金：国家自然科学基金(60762002);广西研究生教育创新计划项目(2010105950812M25)

摘　　要：研究水下信道通信优化问题,由于水下传感器网络在海洋数据采集有广泛的应用。水声信道具有高延迟、低带宽等复杂特点,影响信道通信质量。传统信道模型对网络仿真的效果比较差。为解决上述问题,对水声信道进行了建模,考虑了实际环境中各类噪声以及水温、盐度等因素对声信号传播的影响,并结合NS2进行了水声通信信道的扩展,最后在水声通信信道的基础上建立了一个多节点环境,对水声信道模型与实际水下环境的相似程度采用上述模型进行了仿真。仿真结果验证了信道模型的合理性,并反映出了水下环境中网络通信效果良好。Underwater sensor network has extensive application prospects in marine data acquisition, and offshore survey with tactical monitoring. Underwater acoustic channel has complex characteristic, like long delay and low bandwidth, and the effect of the network simulation is intensively influenced by the underwater acoustic channel mod- el. This paper proposed a model of underwater acoustic channel which mainly considers the influence of all kinds of noises, temperature and salinity in actufil environment on acoustic signal transmission, then extended the underwater acoustic communication channel based on NS2. Ffinally, a multiple nodes simulation environment was established with this underwater acoustic communication channel model, testing similar degree between underwater acoustic chan- nel and the practical underwater environment, and the performance of SMAC under the channel model. Simulation results verify the rationality of the channel model, and reflect some characteristics of the network protocol in the underwater environment.

关 键 词：水下传感器网络 水声信道模型 网络仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]