| 一种新的VHF信道访问协议分析方法 |
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| 引用本文： | 张军,方新,潘磊,张其善.一种新的VHF信道访问协议分析方法[J].电子学报,2000,28(3):49-52. |
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| 作者姓名： | 张军 方新 潘磊 张其善 |
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| 作者单位： | 北京航空航天大学电子工程系,北京 100083 |
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| 基金项目： | 航空科学基金，航空预研基金 |
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| 摘 要： | 本文提出了一种基于半马尔可夫模型的VHF信道访问协议分析方法.在建立空地数据链信道访问的状态分析模型的基础上,通过将状态平均停留时间和状态转移概率同时引入模型中,给出了信道处于安全状态概率和系统忙用户数的表达,为信道访问协议的性能分析和评价提供了一种新的方法.这种方法不需限制系统参数分布为指数分布,更接近实际情况,将其用于VHF空地数据链系统的仿真结果表明,该方法是行之有效的.
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| 关 键 词： | 甚高频数据链 空地通信 CSMA 半马尔可夫模型 |
| 收稿时间： | 1999-03-11 |
A New Method of Very High Frequency Channel Access Protocol Analysis |
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| ZHANG Jun,FANG Xin,PAN Lei,ZHANG Qi-shan.A New Method of Very High Frequency Channel Access Protocol Analysis[J].Acta Electronica Sinica,2000,28(3):49-52. |
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| Authors: | ZHANG Jun FANG Xin PAN Lei ZHANG Qi-shan |
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| Affiliation: | Beijing University of Aeronautics and Astronautics,Beijing 100083,China |
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| Abstract: | A new method of VHF channel access protocol analysis based on semi Markov model is presented in this paper.A model of channel access state transition for air ground datalink is established.By introducing the state mean holding times(HT) and state transition probabilities (TP) into this model,the presentation of the safe state probability and the number of busy users is obtained,which is a new way for property analysis and evaluation of channel access protocol.By using this approach,system parameters are not restricted to an exponential distribution,which is close to the practical situation.The method has been applied into VHF datalink system and the simulation results show that it is effective. |
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| Keywords: | VHF datalink air ground communication CSMA semi markov model |
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