Network Recovery: Protection and Restoration of Optical, SONET-SDH, IP, and MPLS
Network Recovery: Protection and Restoration of Optical, SONET-SDH, IP, and MPLS
Optical WDM Networks (Optical Networks)
Optical WDM Networks (Optical Networks)
Performance Evaluation of Dynamic Restoration Techniques for Survivable Optical Networks
ISCC '06 Proceedings of the 11th IEEE Symposium on Computers and Communications
Mesh-based Survivable Transport Networks: Options and Strategies for Optical, MPLS, SONET and ATM Networking
Generalized sharing in survivable optical networks
IEEE/ACM Transactions on Networking (TON)
On-line optimal wavelength assignment in WDM networks with shared wavelength converter pool
IEEE/ACM Transactions on Networking (TON)
A comparison on bandwidth requirements of path protection mechanisms
ICN'05 Proceedings of the 4th international conference on Networking - Volume Part I
All-optical wavelength conversion: technologies and applications in DWDM networks
IEEE Communications Magazine
Shareability in optical networks: beyond bandwidth optimization
IEEE Communications Magazine
Wavelength conversion in WDM networking
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
IP restoration vs. WDM protection: is there an optimal choice?
IEEE Network: The Magazine of Global Internetworking
A review of fault management in WDM mesh networks: basic concepts and research challenges
IEEE Network: The Magazine of Global Internetworking
Providing resilience for carrier ethernet multicast traffic
CISST'10 Proceedings of the 4th WSEAS international conference on Circuits, systems, signal and telecommunications
Capacity efficiency of recovery request bundling
CISST'10 Proceedings of the 4th WSEAS international conference on Circuits, systems, signal and telecommunications
Evaluating multicast resilience in carrier Ethernet
WSEAS Transactions on Circuits and Systems
Evaluating the efficiency of shortcut span protection
WSEAS TRANSACTIONS on COMMUNICATIONS
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A new generation of optical components and the advance of the Generalized Multi-Protocol Label Switching (GMPLS) control plane supporting dynamic provisioning and restoration of optical connections (i.e., lightpaths), brings the vision of the dynamic all-optical network closer to reality. An emerging technology is the conversion between wavelengths, which removes the wavelength continuity constraint, thus allowing an easier and more flexible connection allocation. A limitation in the number of wavelength converters impairs their benefits especially during the restoration phase, when many simultaneous recovery attempts must share residual resources. This paper investigates the restoration performance of GMPLS-controlled all-optical networks with limited wavelength converter deployment. We investigate how different restoration methods, namely span restoration, segment restoration, and end-to-end restoration are affected by the availability of a limited number of wavelength converters at each node. For this purpose an enhanced wavelength assignment scheme compliant with GMPLS signaling is exploited, aiming at saving converters by assigning a higher preference to wavelengths not requiring conversion. An extensive simulation study has been conducted comparing the performance of this scheme to the most advanced scheme based on standard GMPLS signaling for the three restoration methods. Simulation results show that the enhanced wavelength assignment scheme significantly reduces the number of wavelength converters (WCs) necessary to achieve good recovery performance. The enhanced scheme especially improves span restoration performance, where the matching between the stubs' and recovery segment wavelength may require a WC. End-to-end restoration is the least affected, due to a higher degree of freedom in the route choice, while segment restoration performance lies in between.