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甚高频空地数据链信道访问模型及性能分析
引用本文:张军,潘磊,方新,张其善.甚高频空地数据链信道访问模型及性能分析[J].航空学报,1999,20(4):17-20.
作者姓名:张军  潘磊  方新  张其善
作者单位:北京航空航天大学电子工程系
基金项目:航空科学基金,航空预研项目
摘    要: 在建立甚高频空地数据链信道访问状态模型的基础上,利用连续时间的马尔可夫链模型和CSMA矩阵分析方法,分析了空地数据包试图发送率、信道传输检测时间对数据链性能的影响,对不同用户访问规律、不同的数据包发送用户数下的信道吞吐量和报文数据延时等性能指标进行数值模拟,结果表明,用户数目、重传率及信道检测时间对数据链性能有显著影响。

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收稿时间:1998-08-07;

MODEL OF CHANNEL ACCESS FOR VHF AIR/GROUND DATALINK AND ITS PERFORMANCE ANALYSIS
ZHANG Jun,PAN Lei,FANG Xin,ZHANG Qi Shan.MODEL OF CHANNEL ACCESS FOR VHF AIR/GROUND DATALINK AND ITS PERFORMANCE ANALYSIS[J].Acta Aeronautica et Astronautica Sinica,1999,20(4):17-20.
Authors:ZHANG Jun  PAN Lei  FANG Xin  ZHANG Qi Shan
Institution:Dept. of Electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing, 100083, China
Abstract:A model of channel access state transition for VHF air/ground datalink, which uses the continuous time Markov chain and the CSMA matrix analyze method, is proposed in this paper. The throughput and data package delay of datalink under various user access laws and user numbers of sending data are calculated to analyze the effects of air/ground report channel loading and channel transmission detection time on the performance of VHF datalink. The results show that the user numbers, retransmission ratio and transmission detection time have significant effects on the performance of VHF datalink.
Keywords:VHF datalink  channel access  CSMA  air/ground communication
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