| 流媒体在分组传送光网络PTN传输的动态带宽分配算法 |
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| 引用本文： | 刘冬梅,刘锦华. 流媒体在分组传送光网络PTN传输的动态带宽分配算法[J]. 现代传输, 2014, 0(1): 53-57 |
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| 作者姓名： | 刘冬梅 刘锦华 |
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| 作者单位： | [1]中国移动通信集团设计院有限公司有线所,北京中国100080 [2] 北京科技大学,北京中国100083 |
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| 摘 要： | 根据光网络由SDH向分组化PTN网络演进及新兴流媒体业务的特点,本文采用混合业务流模型,引入门限控制,多级选择丢弃和多级缓存优先级的概念,提出了一种基于业务分类和业务优先级的带宽分配算法-基于门限的动态优先级带宽分配方案（TDPBA）,克服了门限控制分配带宽颗粒过大和优先级算法运算量较大的弊病,在特别定制的试验平台上进行了四优先级系统的网络性能仿真,验证了此方案可以最大限度的保障高优先级业务的传输,可以用于对QoS有较高要求的业务,适合引入处在分组化进程中的光网络,在现有网络上更有效的承载流媒体业务.
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| 关 键 词： | 光网络 分组化 流媒体 动态带宽分配 门限算法 |
Dynamic Bandwidth Allocation Algorithm Suitable for Streaming Media Transmission in PTN |
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| Abstract: | Perfimnance of a threshold-based dynamic prioriW bandwidth allocation suitable for SDH/SONET-based Metro Area Optical Network is presented. The newly proposed scheme overcomes the inaccurate bandwidth allocation of threshold control and the complex conlputation of traditional prioriW algorithm and easy to realize in the system. We sinmlate the network transmit perfi）nnance on a specific four-class priority system software test bed, the result shows that the TDPBA algorithm can assure the credible transmission for this kind of traffic maxinum but at the cost of low QoS traffic, which is suitable for the application that with strict QoS requirements. |
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| Keywords: | Optical network streaming media dynamic bandwidth allocation threshold algorithm |
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