Spare capacity allocation and optimisation in a distributed GMPLS-based IP/WDM mesh network
Computer Communications
Multi-layer Traffic Engineering (MTE) in Grooming Enabled ASON/GMPLS Networks
Towards Digital Optical Networks
Optical IP switching for dynamic traffic engineering in next-generation optical networks
ONDM'07 Proceedings of the 11th international IFIP TC6 conference on Optical network design and modeling
Incorporating protection mechanisms in the dynamic multi-layer routing schemes
NETWORKING'07 Proceedings of the 6th international IFIP-TC6 conference on Ad Hoc and sensor networks, wireless networks, next generation internet
Multilayer quality and grade of service support for high speed GMPLS IP/DWDM networks
NBiS'07 Proceedings of the 1st international conference on Network-based information systems
A study on cross-layer multi-constraint path computation for IP-over-optical networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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
Power-efficient multi-layer networking: design and evaluation
ONDM'10 Proceedings of the 14th conference on Optical network design and modeling
On M-concurrency path computation and its application in dynamic service multi-layer networks
ONDM'10 Proceedings of the 14th conference on Optical network design and modeling
Integrated routing in GMPLS-based IP/WDM networks
Photonic Network Communications
Multi-layer network recovery: avoiding traffic disruptions against fiber failures
ICCS'06 Proceedings of the 6th international conference on Computational Science - Volume Part IV
Resource provisioning for multigranular traffic flows in multilayer networks
Photonic Network Communications
A concurrent two-layer restoration scheme for GMPLS WDM networks
Optical Switching and Networking
Dynamic grooming in IP over optical networks based on the overlay architecture
Optical Switching and Networking
Hierarchical routing and traffic grooming in IP/MPLS-based ASON/GMPLS multi-domain networks
Photonic Network Communications
Computer Networks: The International Journal of Computer and Telecommunications Networking
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This article presents two dynamic multilayer routing policies implemented in the photonic MPLS router developed by NTT for IP+optical generalized MPLS networks. According to IP traffic requests, wavelength paths called lambda label switched paths are set up and released in a distributed manner based on GMPLS routing and signaling protocols. Both dynamic routing policies first try to allocate a newly requested electrical path to an existing optical path that directly connects the source and destination nodes. If such a path is not available, the two policies employ different procedures. Policy 1 tries to find available existing optical paths with two or more hops that connect the source and destination nodes. Policy 2 tries to establish a new one-hop optical path between source and destination nodes. The performances of the two routing policies are evaluated. Simulation results suggest that policy 2 outperforms policy 1 if p is large, where p is the number of packet-switching-capable ports; the reverse is true only if p is small. We observe that p is the key factor in choosing the most appropriate routing policy. We also describe items that need to be standardized in the IETF to effectively achieve multilayer traffic engineering.