Shared protected grouped optical path routing network design employing iterative path group relocation
Shared protected grouped optical path routing network design employing iterative path group relocation
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DOI：
10.1109/rndm.2015.7324312
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发表时间：
2015-10
期刊：
影响因子：
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通讯作者：
Tomohiro Ishikawa;Y. Mori;H. Hasegawa;Ken-ichi Sato
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文献类型：
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作者：
Tomohiro Ishikawa;Y. Mori;H. Hasegawa;Ken-ichi Sato
随着ROADM在光网络中的广泛应用，特别是在大城市中，平均光路所经过的WSS数目不断增加，WSS的光滤波效应（频谱窄化效应）成为透明光网络中的一个严重问题。为了解决这种损害，并使更高的光纤频率利用率，同时实现对故障的弹性，我们提出了一个粗粒度的路由光网络架构，采用共享保护及其设计算法，考虑到损害，并适用于迭代的路径束的重新定位。提出的共享保护方案成功地解决了频谱窄化带来的损害，从而使光纤内更密集的光路适应成为可能。数值实验表明，频谱利用率可以大大提高，因此，所需的光纤数量可以减少传统的路径粒度路由网络的路径级共享保护。
The wide deployment of ROADM based photonic networks, particularly in metro areas, compels an increase in the number of WSSs traversed by the average optical path. The impairment caused by optical filtering of WSSs, called spectrum narrowing effect, can be a serious problem in transparent optical networks. To resolve this impairment and to enable higher fiber frequency utilization while achieving resiliency against a failure, we propose a coarse granular routing optical network architecture which adopts shared protection and its design algorithm that considers the impairment and applies an iterative relocation of bundles of paths. Proposed shared protection scheme successfully resolves the impairment caused by spectrum narrowing, and as a result, much dense optical path accommodation within fibers become possible. Numerical experiments shows that the spectral utilization efficiency can be substantially improved and hence needed number of fibers can be reduced over conventional path granular routing networks with path level shared protection.