航空甚高频数据链模式二建模及仿真研究  

Research on Modeling and Simulation of Aviation VHF Data Link Mode 2

作　　者：贾旭光[1] 张学军[1] 张军[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《系统仿真学报》2007年第21期5046-5050,共5页Journal of System Simulation

基　　金：北京航空航天大学2004年度蓝天科技新星计划

摘　　要：依据航空甚高频数据链模式二(VDLM2)协议,基于其物理层和链路层,建立了VDLM2的OPNET模型。在此基础上,仿真分析了平均MAC子层延时和平均链路层延时与飞机数量之间的关系,并与理论值进行了对比,验证了仿真模型的正确性。然后,仿真分析了吞吐量和信道效率与实供负载之间的关系。分析结果表明,当实供负载位于0.3～0.7区间内时,VDLM2通信系统的传输性能最佳。According to the aviation VHF Data Link Mode 2 （VDLM2） protocol and based on its physical layer and link layer, the VDLM20PNETmodels were created. Based on the above models, the relationship between average MAC sublayer delay and aircraft number, and the relationship between average link layer delay and aircraft number were analyzed. The simulation results were compared with the theoretical results to validate the above models. Then the relationship between throughput and offered load, and the relationship between channel efficiency and offered load, were analyzed. The analysis results show that the offered load values in the range of（0.3, 0.7） result in the best performance of the VDLM2 communications system.

关 键 词：甚高频数据链模式二 OPNET 延时 吞吐量 信道效率 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]