基于OPNET的水声通信网络设计与仿真  

Design and Simulation of Underwater Acoustic Communication Network Based on OPNET

作　　者：韩晶[1] 黄建国[1] 冉茂华[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《系统仿真学报》2009年第17期5498-5502,共5页Journal of System Simulation

基　　金：中国博士后科学基金项目(20080441183)

摘　　要：水声通信网络是实现如海洋数据采集、离岸勘测与战术监测等水下系统无线信息传输的主要手段,但其性能受水声信道特性影响严重。为此,采用OPNET对水声通信网络节点模型与分层协议进行设计与实现,其特征包括基于CDMA的多用户检测以及RTS-CTS-DATA-ACK信道握手流程与网络分配向量(NAV)帧冲突处理机制等。同时建立并测试了一个包含1个主节点与5个传感器节点的水声通信网络,仿真结果表明主节点物理层采用多用户接收技术能够更好的克服冲突,减少数据包重发,从而获得更高水声通信网络的吞吐量,减少端对端传输延时与能量消耗。Acoustic communication network is the main solution for wireless information transmission of underwater applications, such as oceanographic data collection, offshore exploration and tactical surveillance, but its performance is degraded by the characteristics of underwater acoustic channel. Underwater acoustic communication network node models and layered protocols were designed and implemented using OPNET, which featured CDMA-based multiuser detection receiver and RTS-CTS-DATA-ACK exchange with network allocation vector （NAV） collision avoidance mechanism. An underwater acoustic communication network consisting of 1 master node and 5 sensor nodes was established and tested. Simulation results show that, by using multiuser receivers in the physical layer of the master node, the network can overcome collisions and reduce the number of retransmissions, therefore, larger throughput, shorter end-to-end delay and less energy consumption are achieved consequently.

关 键 词：水声网络 水声通信 码分多址 多用户检测 

分 类 号：TN929.3[电子电信—通信与信息系统]