光网络中视频业务传输的节点排队机制

陆旻; 张平; 李正斌

光学学报, 2008, 28 (s2): 191, 网络出版: 2009-01-05

光网络中视频业务传输的节点排队机制

Node Queueing Mechanism of Video Transmission in Optical Networks

论文大纲

陆旻 ^*张平李正斌

作者单位

北京大学区域光纤通信网与新型光通信系统国家重点实验室,北京 100871

光网络视频业务排队机制时延抖动 optical network video service queueing mechanism time jitter

摘要

对服务质量(QoS)中的队列机制进行了重点的分析, 并对先进先出(FIFO)以及具有优先级(PQ)的两种队列机制的特点进行了详细的比较。具有优先级(PQ)队列可以降低高优先级业务的平均排队时延, 但却无法保证时延抖动的要求。提出了基于具有优先级队列机制的改进方案。仿真结果表明, 新的排队机制有效得解决了具有优先级(PQ)排队机制中无法保证高优先级(视频)业务传输中的时延抖动问题, 当初始时延分布差别很大的数据包在经过节点排队调度之后, 时延抖动有了明显改善。

Abstract

The queueing management strategy of quality of service(QoS) was analyzed as a key point. First, the performances of first in first out (FIFO) queueing mechanism and priority queuing (PQ) mechanism were obtained and compared. It was found that PQ mechanism could reduce the average delay of the higher priority traffic, but the time jitter was still not under control. Therefore, an improved algorithm based on PQ mechanism was developed to solve this problem. The simulation results showed that the delay jitter was decreased significantly by the improved algorithm, and the delay jitter was improved when the data packets of different initial time delay were queued in the nodes.

参考文献

[1] 王德泽,王永斌.全光网的实现[J].中国有线电视, 2007, (7):66～67

Wang Deze, Wang Yongbin, Implementation of all-optical network[J]. China Cable TV, 2007, (7):,66～67

[2] 姜国臣, 谭贤四, 范照勇, 排队规则对FTP、Video、VoIP应用的性能影响[J].现代电子技术, 2006, 29(5):50～56

Jiang Guochen, Tan Xiansi, Fan Zhaoyong, Effects of queuing disciplines on performance of FTP, Video and VoIP[J].Modern Electronics Technique, 2006, 29(5):50～56

[3] 盛友招. 排队论及其在现代通信中的应用[M].人民邮电出版社,2007.85～88

Sheng Youzhao, Queuing Theory and Application in Modern Communication[M].Post & Telecom Press, 2007.85～88

[4] . 网络QoS调度策略的分析与研究[J]. 计算机工程与应用, 2006, 42(29): 118-120.

. Research and analysis of network QoS schedule strategies[J]. Computer Engineering and Applications, 2006, 42(29): 118-120.

[5] 孟玉珂. 排队论基础及应用[M].上海：同济大学出版社, 1989.105～112

Meng Yuke. Basis and Applications of Queuing Theory[M].Shanghai:TongJi University Press, 1989. 105～112

[6] 唐纳. 实用排队分析[M].麦格劳-希尔出版社, 1995

M.Tanner. Practical Queueing Analysis[M]. McGraw-Hill,1995

[7] 纳德克兰罗克. 排队系统: 理论[M]. 约翰威立出版社, 1975

Leonard Kleinrock. Queueing Systems: Theory [M]. John Wiley & Sons, 1975

陆旻, 张平, 李正斌. 光网络中视频业务传输的节点排队机制[J]. 光学学报, 2008, 28(s2): 191. Lu Min, Zhang Ping, Li Zhengbin. Node Queueing Mechanism of Video Transmission in Optical Networks[J]. Acta Optica Sinica, 2008, 28(s2): 191.

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