Survivable MPLS Over Optical Transport Networks: Cost and Resource Usage Analysis

— In this paper we study different options for the survivability implementation in MPLS over Optical Transport Networks (OTN) in terms of network resource usage and configuration cost. We investigate two approaches to the survivability deployment: single layer and multilayer survivability and present various methods for spare capacity allocation (SCA) to reroute disrupted traffic. The comparative analysis shows the influence of the offered traffic granularity and the physical network structure on the survivability cost: for high bandwidth LSPs, close to the optical channel capacity, the multilayer survivability outperforms the single layer one, whereas for low bandwidth LSPs the single layer survivability is more cost-efficient. On the other hand, sparse networks of low connectivity parameter use more wavelengths for optical path routing and increase the configuration cost, as compared with dense networks. We demonstrate that by mapping efficiently the spare capacity of the MP...

• Type: Journal
• Year: 2007
• Where: CORR
• Authors: Wojtek Bigos, Bernard Cousin, Stéphane Gosselin, Morgane Le Foll, Hisao Nakajima
• Keywords: CORR 2007, Education, Multilayer Survivability, Single Layer, Survivability