| 探测包长可变的往返时延测量 |
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| 引用本文： | 肖宇峰.探测包长可变的往返时延测量[J].电视技术,2014,38(23). |
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| 作者姓名： | 肖宇峰 |
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| 作者单位： | 1. 西南科技大学信息工程学院,四川绵阳621010;西南科技大学特殊环境机器人技术四川省重点实验室,四川绵阳621010
2. 西南科技大学信息工程学院,四川绵阳,621010 |
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| 基金项目： | 四川省教育厅重点项目（14ZA0091）；四川省应用基础研究计划资助项目（2012JYZ003）；核能开发科研项目（[2011]1137） |
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| 摘 要： | 作为高清视频传输领域的新型技术,巨帧传输加剧了网络延迟动态性,使得传统时延测量方法很难准确估计往返时间。提出了一种探测包长可变的往返时延测量方法:测量初期,确定保证超时定时器稳定工作的增益系数和偏差权重系数范围;测量期间,根据包长动态设定这两个系数。该方法使得超时定时器能反映时延的动态性,提高定时准确性,减少不必要的重传。实验表明该方法可在巨帧网络中有效测量往返时延。
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| 关 键 词： | 高清视频传输 网络测量 时延 超时 巨帧 |
| 收稿时间： | 2014/4/11 0:00:00 |
| 修稿时间： | 6/6/2014 12:00:00 AM |
Round Trip Time Measurement Based on Probe Packets with Dynamic Size |
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| Xiao Yu Feng.Round Trip Time Measurement Based on Probe Packets with Dynamic Size[J].Tv Engineering,2014,38(23). |
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| Authors: | Xiao Yu Feng |
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| Affiliation: | Information Engineering School, Southwest University of Science and Technology |
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| Abstract: | As a new transmission technology of high-definition video, jumbo frame aggravates network delay dynamic condition and makes traditional delay measurement difficult. This paper proposes a round trip time measurement method based on probe packets with dynamic size: at initial phase, the gain coefficient and deviation coefficient ranges of timeout timer are calculated; then, these two coefficients are set with packet size. This method makes timeout timer accurately catch the delay variance, and the unnecessary retransmissions can be decreased. Experiment shows this method can efficiently work in network configured with jumbo frame. |
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| Keywords: | high-definition video transmission network measurement delay timeout jumbo frame |
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