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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:

期数:

2007年05期

页码:

217-220

栏目:

智能、算法、系统工程

出版日期:

1900-01-01

文章信息/Info

Title:

Research about Algorithm of Reconfiguration of Virtual Topology in WDM Network

文章编号:

1673-629X（2007）05-0217-04

作者:

钟华

武汉工程大学计算机科学与工程学院

Author(s):

ZHONG Hua

School of Computer Science and Technology, Wuhan Institute of Technology

关键词:

WDM; 虚拓扑重构; 水印参数; 自适应启发式算法

Keywords:

WDM;  reconfiguration of virtual topology;  watermark parameters;  adaptation algorithm

分类号:

TP393.03

文献标志码:

A

摘要:

介绍了WDM光网络中当网络需求发生改变时，如何对现有的光网络进行重构，从而达到既满足新的业务量需求；又使原来的虚拓扑改变尽量少；同时使正在运行的分组数据没有任何损伤（或损伤小），即实现无损伤重构。方法的主要思想是通过光连通性去测量在光路连通（以测量周期为基础定期地测量）情况下实际负载的业务量，当遭遇到负载不平衡的时候，可以通过去卸载一条轻负载的光路或者重新建立一条新的光路当拥塞发生的时候去解决。并且引入光路负载上的高和低的水印参数去探测任何没有被充分利用的光路。对虚拓扑进行重构提出一种自适应启发式算法

Abstract:

Introduce how to reconfigure the current virtual topology in order to ~tisfy the newly traffic demand. At the same time minimize the formal virtual topology change; keep the data on transport not interrupted when WDM network＇s traffic has been changed. These three questions must be considered on reconfigure virtual topology. The key idea of approach is to adapt the underlying optical connectivity by measuring the actual traffic load on lightpaths continuously （periodically based on a measurement period） and reacting promptly to the load imbalances caused by fluctuations on the traffic, it is corrected either by tearing down a lightpath that is lightly loaded or by setting up a new lightpath when congestion occurs. Introduce high and low watermark parameters on lightpath loads to detect any over- or underutilized lightpath, and to trigger an adaptation step. Put forward the adaptation algorithm of reconfiguration of virtual topology

备注/Memo

备注/Memo:

钟华（1981-），男，湖北武汉人，硕士研究生，研究方向为光网络；导师：蔡琼，硕士，副教授，研究方向为计算机应用技术

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更新日期/Last Update: 1900-01-01