Some principles for designing a wide-area WDM optical network
IEEE/ACM Transactions on Networking (TON)
IEEE/ACM Transactions on Networking (TON)
IEEE/ACM Transactions on Networking (TON)
Mesh-based Survivable Transport Networks: Options and Strategies for Optical, MPLS, SONET and ATM Networking
Resilience in multilayer networks
IEEE Communications Magazine
IP over optical networks: architectural aspects
IEEE Communications Magazine
Intelligent optical networking for multilayer survivability
IEEE Communications Magazine
A joint resilience scheme with interlayer backup resource sharing in IP over WDM networks
IEEE Communications Magazine
Design of logical topologies for wavelength-routed optical networks
IEEE Journal on Selected Areas in Communications
Dimensioning of survivable WDM networks
IEEE Journal on Selected Areas in Communications
Fault management in IP-over-WDM networks: WDM protection versus IP restoration
IEEE Journal on Selected Areas in Communications
Integrated IP/WDM routing in GMPLS-based optical networks
IEEE Network: The Magazine of Global Internetworking
The effects of multi-layer traffic on the survivability of IP-over-WDM networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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In this paper we study different options for the survivability implementation in MPLS over Optical Transport Networks (OTNs) in terms of network resource usage and configuration cost. We investigate two approaches to the survivability deployment: single-layer survivability, where some recovery mechanism (e.g. protection or restoration) is implemented in a single network layer and multilayer survivability, where recovery is implemented in multiple network layers. The survivable MPLS over OTN design is implemented as a static network optimization problem and incorporates various methods for spare capacity allocation (SCA) to reroute disrupted traffic. The comparative analysis between the single layer and the multilayer survivability shows the influence of the traffic granularity 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. For the multilayer survivability 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, this is at the increase in the optimization problem complexity. These results are based on a cost model with current technology pricing and were obtained for networks targeted to a nationwide coverage.