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A Review of Traffic Grooming in WDM Optical Networks: Architectures and Challenges
Keyao Zhu,Biswanath Mukherjee +1 more
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TLDR
Various network and node architectures for different traffic -grooming scenarios are compared and discussed and it is expected that there will be much more interest on the mesh topology suitable for long-haul, widearea networks.Abstract:
The transmission capacity of a link in today’s optical networks has increased significantly due to wavelength-division multiplexing (WDM) technology. The network performance is now mainly limited by the processing capability of the network elements, which are mainly electronic. By efficiently grooming low-speed traffic streams onto high-capacity optical channels, it is possible to minimize this electronic processing and eventually increase the network performance. Traffic grooming is an emerging topic that has been gaining more research and commercial attention. Most previous research on traffic grooming is mainly based on the ring network topology. It is expected that there will be much more interest on the mesh topology suitable for long-haul, widearea networks. This paper reviews most of the recent research work on traffic grooming in WDM ring and mesh networks. Various network and node architectures for different traffic -grooming scenarios are compared and discussed. * This work has been supported by the National Science Foundation (NSF) under Grant Nos. NCR-9508239 andANI-9805286, and by Sprint Advanced Technology Laboratories (ATL).read more
Citations
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Routing and Spectrum Allocation in Elastic Optical Networks: A Tutorial
TL;DR: A tutorial that covers the key aspects of elastic optical networks, and explores the experimental demonstrations that have tested the functionality of the elastic optical network, along with the research challenges and open issues posed by flexible networks.
Journal ArticleDOI
A novel generic graph model for traffic grooming in heterogeneous WDM mesh networks
TL;DR: A new generic graph model for traffic grooming in heterogeneous WDM mesh networks, based on the auxiliary graph, is proposed which can achieve various objectives using different grooming policies, while taking into account various constraints such as transceivers, wavelengths, wavelength-conversion capabilities, and grooming capabilities.
Journal ArticleDOI
Traffic grooming for survivable WDM networks - shared protection
TL;DR: This work investigates the survivable traffic-grooming problem for optical mesh networks employing wavelength-division multiplexing (WDM), and proposes effective heuristics for grooming a connection request with shared protection.
Proceedings ArticleDOI
Dynamic traffic grooming in WDM mesh networks using a novel graph model
TL;DR: A new, generic graph model for dynamic traffic grooming in WDM mesh networks is employed and an adaptive grooming policy (AGP) is proposed, and the results show that AGP outperforms the fixed grooming policies.
Journal ArticleDOI
Prospects and Challenges of Multi-Layer Optical Networks
Ken-ichi Sato,Hiroshi Hasegawa +1 more
TL;DR: State of the art of the key enabling technologies are demonstrated including hierarchical optical cross-connect switch architectures, hierarchical optical path network design algorithms, a newly developed waveband filter, and waveband conversion technologies.
References
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Journal ArticleDOI
Reducing electronic multiplexing costs in SONET/WDM rings with dynamically changing traffic
Randall A. Berry,Eytan Modiano +1 more
TL;DR: This paper considers traffic grooming in WDM/SONET ring networks when the offered traffic is characterized by a set of traffic matrices and provides a lower bound on the number of ADMs required and conditions that a network must satisfy in order for it to support the desired set of roads.
Proceedings ArticleDOI
Capacity fairness of WDM networks with grooming capabilities
TL;DR: In this article, the issue of capacity fairness in WDM networks with traffic grooming capabilities, supporting lower-rate circuit-switched traffic streams is addressed, and the capacity fairness of existing dynamic wavelength assignment algorithms is studied.
Proceedings ArticleDOI
A capacity correlation model for WDM networks with constrained grooming capabilities
S. Thiagarajan,A.K. Somani +1 more
TL;DR: A new capacity correlation model is proposed which takes into account the capacity distribution on the wavelength, the arrival rates of the calls of varying capacity, and the load correlation on neighbouring links to compute the blocking performance on a multi-hop single wavelength path.
Proceedings ArticleDOI
Architectures and algorithm for multicasting in WDM optical mesh networks using opaque and transparent optical cross-connects
N.K. Singhal,Biswanath Mukherjee +1 more
TL;DR: This study presents two kinds of switch architectures to support multicasting, and presents preliminary results obtained for efficient routing and wavelength assignment of multicast sessions.
Interconnected WDM Ring Networks: Strategies for Interconnection and Traffic Grooming*
Jian Wang,Biswanath Mukherjee +1 more
TL;DR: In this article, the authors compare four interconnection strategies from using traditional Digital Crossconnects to using innovative optical crossconnects and show that TDM-level switching is useful when the number of sub-channels in a wavelength is neither too small nor too large, while pure optical switching may be a better choice for other cases.