| Packet Queueing Delay in Resilient Packet Ring Network Nodes |
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| 作者姓名： | 史国炜 方红波 曲建岭 曾烈光 |
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| 作者单位： | [1]StateKeyLaboratoryonMicrowaveandDigitalCommunications,DepartmentofElectronicEngineering,TsinghuaUniversity,Beijing100084,China [2]NavalAeronauticalEngineeringAcademyQingdaoBranch,Qingdao266041,China |
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| 基金项目： | the National High-Tech Research and Devel-opment (863) Program of China (No. 2002AA121041) |
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| 摘 要： | The packet queueing delay is one of the most important performance measures of a data network and is also a significant factor to be considered in the scheduling buffer design for a network node. This paper presents a traffic queueing model for resilient packet ring (RPR) networks and a method for quantitatively analyzing queueing delays in RPR nodes. The method was used to calculate the average queueing delays of different priority traffic for different transit queue modes. The simulations show that, in the transmit direction, lower priority traffic is delayed more than higher priority traffic, and that Class-A traffic is delayed more in a single-queue ring than in a dual-queue ring. In the transit direction, the secondary transit buffer in the dual-queue ring contributes more to the traffic delay than the primary transit buffer in the single-queue ring, which in turn causes more delay than the primary transit buffer in the dual-queue ring.
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| 关 键 词： | 包队列延迟 队列模型 弹性包环 网络节点 数据链路 |
Packet Queueing Delay in Resilient Packet Ring Network Nodes |
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| SHI Guowei,FANG Hongbo,QU Jianling,ZENG Lieguang State Key Laboratory on Microwave and Digital Communications.Packet Queueing Delay in Resilient Packet Ring Network Nodes[J].Tsinghua Science and Technology,2004,9(4):406-409,415. |
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| Authors: | SHI Guowei FANG Hongbo QU Jianling ZENG Lieguang State Key Laboratory on Microwave and Digital Communications |
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| Institution: | SHI Guowei,FANG Hongbo,QU Jianling,ZENG Lieguang State Key Laboratory on Microwave and Digital Communications,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China,Naval Aeronautical Engineering Academy Qingdao Branch,Qingdao 266041,China |
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| Abstract: | The packet queueing delay is one of the most important performance measures of a data net-work and is also a significant factor to be considered in the scheduling buffer design for a network node. This paper presents a traffic queueing model for resilient packet ring (RPR) networks and a method for quantitatively analyzing queueing delays in RPR nodes. The method was used to calculate the average queueing delays of different priority traffic for different transit queue modes. The simulations show that, in the transmit direction, lower priority traffic is delayed more than higher priority traffic, and that Class-A traffic is delayed more in a single-queue ring than in a dual-queue ring. In the transit direction, the secondary tran-sit buffer in the dual-queue ring contributes more to the traffic delay than the primary transit buffer in the sin-gle-queue ring, which in turn causes more delay than the primary transit buffer in the dual-queue ring. |
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| Keywords: | resilient packet ring queueing model queueing delay |
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