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Reconfigurable optical networks: An IP/MPLS over WDM study .

机译：可重新配置的光网络：WDM上的IP / MPLS研究。

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摘要

Motivated by diurnal variation of traffic patterns in the large backbone networks, the first part of this dissertation addresses the fundamental question of under which conditions the deployment of reconfigurable optical layer can be justified. A comprehensive empirical study is conducted to answer the question. The benchmarking is carried by comparing a traffic engineering method capable of rerouting the LSP's with fixed optical layer to mitigate the adverse effect of traffic fluctuation.;Depending on the traffic fluctuation scenarios, and the network resources, this study provides an answer for IP/MPLS over WDM networks. In this dissertation, for small networks the results are presented using a flow based ILP model. However, for larger networks the problem is tackled by taking advantage of a novel heuristic (BinCluster).;Once the reconfigurable optical layer is deployed, the next question is how to migrate the virtual topology of the network. The second part of this dissertation addresses the virtual topology migration problem under traffic fluctuation scenarios. Algorithmic solutions are presented to conduct a smooth migration of the virtual topology from the perspective of upper layer traffic. Two optimization problems are considered, one with a single objective function and the second a multi-objective optimization with primary and secondary objectives.;Finally, a numerical method is presented to obtain a lower bound on the lightpath capacity of the network which guarantees the non-disruptive reconfiguration of the network.
机译：基于大型骨干网中流量模式的日间变化，本文的第一部分解决了一个基本问题，即在何种条件下可合理配置可重构光层。进行了全面的实证研究来回答这个问题。通过比较能够通过固定光层重新路由LSP的流量工程方法来减轻流量波动的不利影响，进行基准测试；根据流量波动情况和网络资源，本研究为IP / MPLS提供了答案在WDM网络上。在本文中，对于小型网络，使用基于流的ILP模型来表示结果。但是，对于较大的网络，可以通过使用新颖的启发式技术（BinCluster）解决该问题。一旦部署了可重新配置的光学层，下一个问题就是如何迁移网络的虚拟拓扑。本文的第二部分解决了流量波动情况下的虚拟拓扑迁移问题。提出了算法解决方案，从高层流量的角度进行虚拟拓扑的平滑迁移。考虑了两个优化问题，一个是具有单个目标函数的优化问题，第二个是具有主要和次要目标的多目标优化问题。最后，提出了一种数值方法来获得网络光路容量的下限，从而保证了无网络的破坏性重新配置。

著录项

  • 作者

    Roshani Tabrizi, Reza.;

  • 作者单位

    The University of Texas at Dallas.;

  • 授予单位 The University of Texas at Dallas.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 120 p.
  • 总页数 120
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 康复医学;
  • 关键词

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