| CSMA—SNP/TR协议的性能优化 |
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| 引用本文： | 石冰心,朱洪.CSMA—SNP/TR协议的性能优化[J].华中科技大学学报(自然科学版),1991(4). |
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| 作者姓名： | 石冰心 朱洪 |
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| 作者单位： | 华中理工大学计算中心
(石冰心)，华中理工大学计算中心(朱洪) |
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| 摘 要： | 在传统的CSMA/CD协议的基础上,本文提出了一种性能更佳的优化CSMA-SNP/TR协议,并从理论分析和模拟实验中得到验证.本研究的理论分析以马尔可夫链(Markov Chain)为基础,通过优化数学模型得出一个重要的延迟方程,并以此作为推测到达率的依据.这种以确定的负反馈方式求得的最佳延迟,最大限度地缩短了冲突浪费的时间,系统的吞吐量可达0.97,而延迟比相同负载下CSMA/CD的延迟小得多.模拟实验结果表明,优化CSMA-SNP/TR较为明显地改善了CSMA/CD在重载下的性能,尤以对延迟特性的改善更为显著.
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| 关 键 词： | CSMA-SNP/TR协议 性能优化 马尔可夫链 延迟 吞吐量 |
Performance Optimization of CSMA-SNP/TR Protocol |
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| Shi Bingxin Zhu Hong.Performance Optimization of CSMA-SNP/TR Protocol[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1991(4). |
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| Authors: | Shi Bingxin Zhu Hong |
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| Institution: | Shi Bingxin Zhu Hong |
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| Abstract: | By referring to the classical CSMA/CD protocol, this paper presents an optimized CSMA-SNP/TR protocol, which is of better performance and has been verified both theoretically and experimentally. The theoretical analysis is based on the Markov chain. An important equation of delay has been obtained by optimizing the mathematical model, which is used as the basis for estimating the arrival rate. The optimized delay found by definite negative feedback has shortened to the maximum possible extent the time wasted due to clash. The system throughput can reach as high as 0.97 and the system delay is much shorter than that of CSMA/CD under the same load. The simulation results show that the optimized CSMA-SNP /TR has appreciably improved the performance of CSMA/CD under heavy load, especially the delay. |
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| Keywords: | CSMA-SNP/TR protocol Performance optimization Markov chain Delay Throughput |
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