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Proceedings Paper

Evaluation of novel resilience schemes in dynamic optical transport networks
Author(s): Monika Jaeger; Ralf Huelsermann; Dominic A. Schupke; Rene Sedlak
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Paper Abstract

Today, Wavelength Division Multiplexing (WDM) transmission systems are deployed extensively in transport networks. They are used mainly for static point-to-point connections. With the availability of fast reconfigurable Optical Cross Connects (OXC) and the introduction of a control plane in the Optical Transport Network (OTN), optical channel based logical networks can be built for dynamic WDM networks. Resilience in current transport networks is mainly based on static SONET/SDH dedicated and shared protection. Distributed control planes allow new, flexible protection mechanisms (e.g. GMPLS reroute and fast reroute). To evaluate future distributed control concepts and new resilience schemes in transport networks, we have implemented a dynamic OTN simulation model. Several case studies have been performed using different protection and restoration methods. Different failure scenarios (single or multiple link failures) were used. The paper evaluates the case studies in terms of scalability, recovery time criteria, capacity use (efficiency) and availability. It is shown that the new and flexible resilience schemes are a promising alternative to traditional statically preplanned protection in transport networks. Furthermore, they provide increased network availability in multiple failure cases.

Paper Details

Date Published: 9 September 2002
PDF: 12 pages
Proc. SPIE 4910, Optical Networking II, (9 September 2002); doi: 10.1117/12.482424
Show Author Affiliations
Monika Jaeger, T-Systems Nova GmbH (Germany)
Ralf Huelsermann, T-Systems Nova GmbH (Germany)
Dominic A. Schupke, Munich Univ. of Technology (Germany)
Rene Sedlak, Deutsche Telekom AG (Germany)

Published in SPIE Proceedings Vol. 4910:
Optical Networking II
Shizhong Xie; Chunming Qiao; Yun Chur Chung, Editor(s)

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