J4 ›› 2013, Vol. 40 ›› Issue (4): 96-101.doi: 10.3969/j.issn.1001-2400.2013.04.016

• 研究论文 • 上一篇    下一篇

星上Clos交换网络的逆向调度算法

张茂森1;邱智亮1;高雅1;黎军2   

  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071;
    2. 中国空间技术研究院西安分院 空间微波技术重点实验室,陕西 西安  710100)
  • 收稿日期:2012-04-09 出版日期:2013-08-20 发布日期:2013-10-10
  • 通讯作者: 张茂森
  • 作者简介:张茂森(1987-),男,西安电子科技大学博士研究生,E-mail: mszhang@stu.xidian.edu.cn.
  • 基金资助:

    国家863计划资助项目(2011AA01A106);国家科技支撑计划资助项目(2012BAH02B02)

Reverse dispatching scheme for satellite Clos-network switches

ZHANG Maosen1;QIU Zhiliang1;GAO Ya1;LI Jun2   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. Key Lab. of Space Microwave, China Academy of Space Technology(Xi'an), Xi'an  710100, China)
  • Received:2012-04-09 Online:2013-08-20 Published:2013-10-10
  • Contact: ZHANG Maosen

摘要:

针对星上交换在匹配效率、硬件复杂度等方面的特殊要求,提出了基于MSM型三级Clos网络的逆向调度算法.与以往调度算法按模块排列顺序执行匹配操作不同,该算法首先在中间级缓存信元请求并进行内部匹配,然后使用中间级的匹配结果指导输入级模块的信元发送.调度过程中各阶段间相互分离,每一阶段的执行不依赖于前一阶段的结果,从而实现整个匹配过程的流水线操作.仿真结果表明,逆向调度算法在不增加硬件开销的前提下提高了调度匹配速度和效率,并达到较低的端到端时延性能.

关键词: 卫星通信, 星上交换, 三级Clos网络, 调度算法, 流水线

Abstract:

For the special requirements of the on-board switching for satellite communication on hardware complexity and matching efficiency, the reverse dispatching scheme for MSM Clos-network switches is proposed. Unlike the previous dispatching schemes which perform matching according to the order of modules, the reverse dispatching scheme first buffers requests, and then performs internal matching in central modules instead. Then the results of the matching are used for the cell-sending in input modules. Different steps of the whole dispatching scheme are isolated in this dispatching scheme, which means that the performance of a step does not depend on the result of the preceding one. Then the whole dispatching scheme can be performed in a pipelined manner. Simulation results show that the reverse dispatching scheme can improve the dispatching efficiency without additional hardware overhead and achieve a low end-to-end delay.

Key words: satellite communication, on-board switching, three-stage Clos-network, dispatching scheme, pipeline

中图分类号: 

  • TP393
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