Ouyang Yong, Zeng Qingji, Wei Wei
Opt Express. 2005 Dec 26;13(26):10457-68. doi: 10.1364/opex.13.010457.
This paper studies the problem of signal-quality-guaranteed lightpath provisioning in survivable translucent optical networks under dynamic traffic. A new protection scheme, called regeneration-segment protection (RSP), is proposed. Provisioning approaches with shared path protection and shared RSP are presented. Two main signal quality constraints are integrated with the provisioning problem. Different regenerator placement strategies for working path and protection path are employed. Joint path selection method is used to select the "optimal" working-protection pair. With the above considerations, survivable lightpath provisioning with signal-quality-guarantees is achieved in a cost-effective manner. Results show that in a moderate-size network, RSP has less blocking probability than path protection when the network load is low or modest. Besides, RSP obtains better performance in terms of recovery time than path protection in all network scenarios.
本文研究了动态流量下可生存半透明光网络中保证信号质量的光路配置问题。提出了一种新的保护方案，称为再生段保护（RSP）。给出了具有共享路径保护和共享RSP的配置方法。将两个主要的信号质量约束与配置问题相结合。采用了不同的工作路径和保护路径的再生器放置策略。使用联合路径选择方法来选择“最优”的工作-保护对。通过上述考虑，以具有成本效益的方式实现了具有信号质量保证的可生存光路配置。结果表明，在中等规模网络中，当网络负载较低或适中时，RSP的阻塞概率比路径保护低。此外，在所有网络场景下，RSP在恢复时间方面比路径保护具有更好的性能。
