Evaluation of Dynamic Optical Service Restoration on a Large-Scale ROADM Mesh Network
| Autor: | Chengliang Zhang, Junjie Li, Aihua Guo, Haiqiang Wang, Christopher Janz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Service (systems architecture)
Computer Networks and Communications Computer science business.industry Fiber (computer science) Mesh networking 020206 networking & telecommunications Service restoration 02 engineering and technology Computer Science Applications Network planning and design Path (graph theory) 0202 electrical engineering electronic engineering information engineering Automatically switched optical network Electrical and Electronic Engineering Scale (map) business Computer network |
| Zdroj: | IEEE Communications Magazine. 57:138-143 |
| ISSN: | 1558-1896 0163-6804 |
| DOI: | 10.1109/mcom.2019.1800307 |
| Popis: | We examine dynamic optical service restoration on a large-scale ROADM network operated by China Telecom in the middle and lower Yangtze River region of China. A WSON-based GMPLS/ ASON control plane, deployed across the network, drives execution of restoration operations. A network survivability analysis (NSA) tool is used for simulation-based assessment of link failure impacts and expected service restoration performance. Evolutions in wavelength utilization, when operating dynamic restoration on a large set of services and over a range of concurrent fiber cut numbers and placements across the network, are examined in detail through NSA-based analysis. The results are partly verified through live network experiments conducted during network commissioning operations. Observations of other restoration performance aspects, such as service times to restore, are also discussed. We show that with dynamic restoration, full service restorability can remain achievable even in the face of four or more concurrent fiber cuts. We describe how findings from NSA-based analyses may be used to influence network planning or to partially prescribe control plane restoration actions to improve service times to restore, and reduce restoration conflicts and failures. We posit that the best such improvements may be available when NSA is operated in concert with centralized path computation applications (e.g., PCE and T-SDN controllers). |
| Databáze: | OpenAIRE |
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