| 延迟抖动在TFRC拥塞控制策略中的应用 |
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| 引用本文： | 谭志勇,赵甫哲. 延迟抖动在TFRC拥塞控制策略中的应用[J]. 计算机与现代化, 2018, 0(5): 116. DOI: 10.3969/j.issn.1006-2475.2018.05.023 |
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| 作者姓名： | 谭志勇 赵甫哲 |
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| 基金项目： | 湖北省高等学校省级教学研究基金资助项目（2015523）； 武汉市教育科学“十三五”规划2016年度立项课题（2016A117） |
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| 摘 要： | 研究在多媒体实时业务中得到广泛应用的基于速率控制的TCP友好性拥塞控制机制TFRC，分析其基本工作流程、吞吐量模型和关键参数的计算。针对实时业务对于网络传输的要求，提出将延迟抖动作为网络拥塞的预警信号应用于TFRC的拥塞控制中，并采用自适应抖动阈值和调整因子来改进TFRC的速率调整机制。仿真实验结果表明，该方法在实时业务的网络传输中能够取得较好的效果，其友好性和平滑性均得到一定程度的改善。
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| 关 键 词： | 多媒体实时业务 TFRC协议 拥塞控制 抖动阈值 调整因子 |
| 收稿时间： | 2018-06-13 |
Application of Delay Jitter in TFRC Congestion Control Strategy |
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| TAN Zhi-yong,ZHAO Fu-zhe. Application of Delay Jitter in TFRC Congestion Control Strategy[J]. Computer and Modernization, 2018, 0(5): 116. DOI: 10.3969/j.issn.1006-2475.2018.05.023 |
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| Authors: | TAN Zhi-yong ZHAO Fu-zhe |
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| Abstract: | The paper studies a rate-based TCP-friendly congestion control mechanism named TFRC, which is widely used in real-time multimedia application, and discusses its basic working process, throughput model and calculation for the key parameters. In order to meet the requirement of real-time application for network transport, a proposal is made that delay jitter could be used in the congestion control as a warning signal of network congestion. Meanwhile, a dynamic adaptive jitter threshold and an adjusting factor are used to improve the rate adjustment mechanism of TFRC. The result of simulation indicates that the improved algorithm can obtain an relative ideal effect in the transport of real-time application. |
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| Keywords: | real-time multimedia application TFRC protocol congestion control jitter threshold adjusting factor |
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