| MVB非周期信息的实时能力分析 |
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| 引用本文： | 曾秋芬,陈特放,刘毅斌.MVB非周期信息的实时能力分析[J].小型微型计算机系统,2012,33(4):905-908. |
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| 作者姓名： | 曾秋芬 陈特放 刘毅斌 |
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| 作者单位： | 中南大学信息科学与工程学院,长沙,410075 |
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| 摘 要： | MVB的实时能力是基于TCN的列车网络控制系统实时性能的重要保证,详细分析了MVB非周期信息的通信原理和调度流程,对仲裁延迟进行了具体的定义,在研究MVB周期信息和非周期信息带宽占用的基础上,给出了MVB非周期信息的最差情况响应时间.根据非周期信息的各种轮询机制,建立不同优先级的最差情况响应时间计算公式.在此基础上,提出了非周期信息实时能力优化策略,分析表明,该策略有效提高了MVB非周期信息的实时通信能力.
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| 关 键 词： | MVB 非周期信息 仲裁延迟 实时能力 |
Realtime Capability Analysis of Aperiodic Message in MVB |
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| ZENG Qiu-fen
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CHEN Te-fang
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LIU Yi-bin.Realtime Capability Analysis of Aperiodic Message in MVB[J].Mini-micro Systems,2012,33(4):905-908. |
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| Authors: | ZENG Qiu-fen CHEN Te-fang LIU Yi-bin |
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| Affiliation: | (School of Information Science and Engineering,Central South University,Changsha 410075,China) |
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| Abstract: | The realtime performance of train network control system based on TCN is guaranteed by realtime capability of MVB.Worst-case response time is obtained by analyzing MVB traffic mechanism of aperiodic messages and the bandwidth shared by both periodic and aperiodic messages.The Calculation formulas of worst-case response time are established to every priority according to the various event-rounding mechanism.Meanwhile,An optimized strategy is proposed which,through verification,turns out to be an efficient way to improve the realtime capability of MVB. |
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| Keywords: | MVB aperiodic message arbitration delay realtime capability |
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