采用动态交错聚合机制改善混合光交换网络的阻塞性能

柳春郁; 刘昌兴; 孟祥宇; 杨九如

doi:10.3788/OPE.20162413.0323

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采用动态交错聚合机制改善混合光交换网络的阻塞性能

更新时间：2020-08-13

- 采用动态交错聚合机制改善混合光交换网络的阻塞性能
- Blocking improvement of hybrid optical switching networks by dynamic interlaced assembly
- 光学精密工程 2016年24卷第10s期页码：323-329
- 作者机构：
  
  1. 黑龙江大学黑龙江省普通高等学校电子工程重点实验室,黑龙江哈尔滨,150080
  2. 黑龙江大学电子工程学院,黑龙江哈尔滨,150080
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目（No.61302075，No.61205071，No.61177079）()
- DOI：10.3788/OPE.20162413.0323
  中图分类号： TN929.11
- 收稿日期：2016-05-23，
  
  修回日期：2016-06-12，
  
  纸质出版日期：2016-11-14
- 稿件说明：
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柳春郁, 刘昌兴, 孟祥宇等. 采用动态交错聚合机制改善混合光交换网络的阻塞性能[J]. 光学精密工程, 2016,24(10s): 323-329

LIU Chun-yu, LIU Chang-xing, MENG Xiang-yu etc. Blocking improvement of hybrid optical switching networks by dynamic interlaced assembly[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 323-329
柳春郁, 刘昌兴, 孟祥宇等. 采用动态交错聚合机制改善混合光交换网络的阻塞性能[J]. 光学精密工程, 2016,24(10s): 323-329 DOI： 10.3788/OPE.20162413.0323.

LIU Chun-yu, LIU Chang-xing, MENG Xiang-yu etc. Blocking improvement of hybrid optical switching networks by dynamic interlaced assembly[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 323-329 DOI： 10.3788/OPE.20162413.0323.

摘要

在混合光交换网络中，为降低虚波群调度（VWGS）所致的高阻塞率与传输延迟，提出了基于动态交错的聚合机制（DIA）以避免波带、波长业务间的竞争。DIA机制在不同边缘节点采用奇偶交错的波长聚合方式，有效实现波带业务间的隔离；并依据费雪公式动态优化波带、波长信道容量，降低业务在核心节点的碰撞几率。数值结果表明，DIA机制保证了带宽分配的灵活性，改善了业务的阻塞与延迟特性，与VWGS相比，中低流量下的丢弃率降低约0.5~3个数量级，平均边缘-边缘传输延迟减少25~40%。DIA机制无需配置波长转换与光缓存等器件，在保持能耗与成本有效性的同时，可兼顾业务在阻塞与延迟方面的服务质量要求，从而有效提升波带-波长混合光交换网络的实用性。

Abstract

In hybrid optical switching networks

a waveband switching method named dynamic interlaced assembly (DIA) for the reductions of high blocking rate and edge-to-edge delay of the virtual wave group scheduling (VWGS) was proposed

in order to avoid the contention of waveband and wavelength channels. At edge nodes

the DIA gathered the wavelengths into a waveband with odd/even and positive/negative sequence to increase the separation among services. Furthermore

the number of wavelength channels was dynamically optimized and the contending probability of traffic was decreased at core nodes based on Ferry formula. The numerical results show that

DIA improves the blocking and delay with high flexibility of waveband assignment. Compared with VWGS

the blocking rate is lowered about 0.5-3 levels and the average edge-to-edge delay is reduced by 25%-40% in light and middle traffic states. Without the supports of wavelength tunable converters and optical buffers

DIA could guarantee the requirements of services with respects to loss and delay with high efficiency of energy consumption and cost

thus proving to be a promising technology to enhance the practicality of hybrid optical switching networks.

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