Dynamic traffic balancing scheme for LB-BvN to guarantee in-order packet delivering

HU Hong-chao; GUO Yun-fei; PANG lin; BU You-jun

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Dynamic traffic balancing scheme for LB-BvN to guarantee in-order packet delivering

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- Dynamic traffic balancing scheme for LB-BvN to guarantee in-order packet delivering
- Vol. 32, Issue 4, Pages: 57-65(2011)
- 作者机构：
  
  解放军信息工程大学国家数字交换系统工程技术研究中心
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN915.06
- Published：2011
- 稿件说明：
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HU Hong-chao, GUO Yun-fei, PANG lin, et al. Dynamic traffic balancing scheme for LB-BvN to guarantee in-order packet delivering[J]. 2011, 32(4): 57-65.
DOI：

HU Hong-chao, GUO Yun-fei, PANG lin, et al. Dynamic traffic balancing scheme for LB-BvN to guarantee in-order packet delivering[J]. 2011, 32(4): 57-65. DOI：

摘要

针对LB-BvN交换结构的分组乱序问题

探讨了LB-BvN交换结构分组保序的约束条件。从网络流量的传输特性出发提出了解决LB-BvN交换结构分组乱序的DFA(dynamic flow assignment)算法和DFS(dynamic flowlet switching)算法。DFA算法以流为单元分派交换路径

能够严格确保流分组的保序交换;DFS算法是对DFA算法的优化

以流簇(flowlet)为单元进行交换以保证流簇的保序

进而确保属于同一条流的分组保序。DFA和DFS算法只需在线路接口卡上维护少量的流状态信息即可实现保序交换

仿真结果表明DFA算法和DFS算法具有良好的时延、时延抖动和吞吐量性能。

Abstract

Due to its outstanding extensibility performance

the LB-BvN switch had attracted much attention recently in the switching technology academia.However

the problem that it might disturb the sequences of packets made it not so applicable in practice.To overcome this

the principles for guaranteeing packets in order switching were first discussed.Then

based on these principles

it focused on research on the transmission characteristics in network traffic and came up with DFA and DFS algorithms.DFA assigned the switching paths to each flow based on their transport layer parameters to make sure that each packet in the flow were in order.DFS was more sophisticated than DFA in that it first divided flows into flowlets.In this way

the flowlets in the flows were in order.Both DFA and DFS could achieve in order packets switching with limited flow states maintained in the line-cards.Simulation results show that both DFA and DFS can achieve good performance.

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Related Author

LI Hui1

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HUANG Jia-qing3

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LEI Kai1

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Related Institution

Integrated Microsystems Lab., Shenzhen Graduate School, Peking University

Shanghai Research Institute of Microelectronics, Peking University

Dept. of Electronics ＆ Info. Eng., Huazhong University of Science ＆ Technology

National Digital Switching Centre, Information Engineering University

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