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...

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Bibliographic Details
Published in:IEEE journal on selected areas in communications 2007-06, Vol.25 (5), p.949-962
Main Authors: Bigos, W., Cousin, B., Gosselin, S., Le Foll, M., Nakajima, H.
Format: Article
Language:English
Subjects:
Bandwidth
Comparative analysis
Computer Science
Cost analysis
Cost control
Cost engineering
Costs
Engineering Sciences
Fiber optics
Integrated approach
Integrated circuit interconnections
Mathematical models
Multilayers
Multiprotocol label switching
Network topology
Networking and Internet Architecture
Networks
Nonhomogeneous media
Optical fiber networks
Optical interconnections
Optical wavelength conversion
Optics
Photonic
Studies
Survivability
Telecommunication traffic
Traffic engineering
Traffic flow
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Summary: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 MPLS layer onto the resources of the optical layer one can achieve up to 22% savings in the total configuration cost and up to 37% in the optical layer cost. Further savings (up to 9 %) in the wavelength use can be obtained with the integrated approach to network configuration over the sequential one, however, at the increase in the optimization problem complexity. These results are based on a cost model with different cost variations, and were obtained for networks targeted to a nationwide coverage
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2007.070608