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首页> 外文期刊>Journal of Lightwave Technology >Optical Network Resource Management Supporting Physical Layer Reconfiguration
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Optical Network Resource Management Supporting Physical Layer Reconfiguration

机译：支持物理层重配置的光网络资源管理

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摘要

To cope with the capacity increase and diversification of information services, enhancing efficiency, flexibility, and agility in optical transport networks is becoming increasingly important. Quick reconfiguration of the optical physical layer, such as changing optical node architectures or optical physical network topologies, provides additional adaptability to requirement or environment changes. This paper proposes a new topology description scheme to support optical physical layer resource management at the granularity of optical functionality blocks in a machine-processible manner. The proposed scheme specifies intra-node structures as well as inter-node fiber connections (links). Furthermore, different switching functionalities of individual optical components are specified in a common format using integer linear programming (ILP) formulas. The ILP formulas are described in a machine-readable GNU MathProg modeling language so as to be directly introduced to the path computation mechanisms. Based on the proposed topology description scheme, a path computation engine named PathFinder is prototyped and demonstrated for optical networks consisting of various optical components with different switching functionalities. The computational feasibility of PathFinder is evaluated through numerical experiments in terms of elapsed time for path computation and the proposed scheme is successful while retaining reasonable time ranges. Operating topology and node architecture changes based on the proposed scheme are also successfully demonstrated over a multi-granular hierarchical optical network testbed with real hardware.
机译：为了应对信息服务的容量增加和多样化，提高光传输网络的效率，灵活性和敏捷性变得越来越重要。光学物理层的快速重新配置（例如更改光学节点体系结构或光学物理网络拓扑）可提供对需求或环境变化的额外适应性。本文提出了一种新的拓扑描述方案，以机器可处理的方式支持光学功能块粒度下的光学物理层资源管理。所提出的方案指定了节点内结构以及节点间光纤连接（链接）。此外，使用整数线性编程（ILP）公式以通用格式指定各个光学组件的不同开关功能。以机器可读的GNU MathProg建模语言描述ILP公式，以便直接将其引入路径计算机制。基于提出的拓扑描述方案，对名为PathFinder的路径计算引擎进行了原型设计，并对其进行了演示，该引擎用于由各种具有不同交换功能的光学组件组成的光网络。通过数值实验，根据路径计算所经过的时间，对PathFinder的计算可行性进行了评估，所提出的方案在保持合理的时间范围内是成功的。在具有实际硬件的多粒度分层光网络测试平台上，还成功地论证了基于所提出的方案的操作拓扑和节点体系结构的变化。

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