Cost-effective traffic grooming in WDM rings
IEEE/ACM Transactions on Networking (TON)
Computers and Intractability: A Guide to the Theory of NP-Completeness
Computers and Intractability: A Guide to the Theory of NP-Completeness
Networks
Cost-effective single-hub WDM ring networks: A proposal and analysis
Computer Networks: The International Journal of Computer and Telecommunications Networking
Optical Network Design and Planning
Optical Network Design and Planning
Competitive analysis of online traffic grooming in WDM rings
IEEE/ACM Transactions on Networking (TON)
Fast algorithms for bin packing
Journal of Computer and System Sciences
Hardness and approximation of traffic grooming
ISAAC'07 Proceedings of the 18th international conference on Algorithms and computation
Traffic grooming and regenerator placement in impairment-aware optical WDM networks
ONDM'10 Proceedings of the 14th conference on Optical network design and modeling
Optimizing regenerator cost in traffic grooming
OPODIS'10 Proceedings of the 14th international conference on Principles of distributed systems
Design and provisioning of WDM networks with many-to-many traffic grooming
IEEE/ACM Transactions on Networking (TON)
Impairment-aware path selection and regenerator placement in translucent optical networks
ICNP '10 Proceedings of the The 18th IEEE International Conference on Network Protocols
Traffic grooming in path, star, and tree networks: complexity, bounds, and algorithms
IEEE Journal on Selected Areas in Communications - Part Supplement
An overview of algorithms for network survivability
ISRN Communications and Networking
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Wavelength Division Multiplexing (WDM) optical networks offer a large amount of bandwidth using multiple, but independent wavelength channels (or lightpaths), each operating at several Gb/s. Since the traffic between users is usually only a fraction of the capacity offered by a wavelength, several independent traffic streams can be groomed together. In addition, in order to reverse the effect of noise and signal degradations (physical impairments), optical signals need to be regenerated after a certain impairment threshold is reached. We consider survivable impairment-aware traffic grooming in WDM rings, which are among the most widely deployed optical network topologies. We first show that the survivable impairment-aware traffic grooming problem, where the objective is to minimize the total cost of grooming and regeneration, is NP-hard. We then provide approximation algorithms (for uniform traffic), and efficient heuristic algorithms whose performance is shown to be close to the lower-bounds (for non-uniform traffic) both when (1) the impairment threshold can be ignored, and (2) the impairment threshold should be considered.