Proceedings ArticleDOI
Degraded services in mixed-line-rate networks using multipath routing
Chaitanya S. K. Vadrevu,Rui Wang,Biswanath Mukherjee +2 more
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TLDR
A multipath routing scheme to support degraded services in MLR networks is developed, and illustrative examples show that significant cost savings can be achieved vs. full protection.Abstract:
Traffic in optical backbone networks is increasing and becoming heterogeneous with respect to bandwidth and QoS requirements due to the popularity of high-bandwidth services such as cloud computing, e-science, telemedicine, etc which need to coexist with traditional services (HTTP, etc) Mixed-line-rate (MLR) networks which support lightpaths of different rates are being studied to support the heterogeneous traffic demands Here, we study the important topic of degraded services in MLR networks, where a service can accept degradation in bandwidth to a certain extent in case of a failure for lower cost, a concept called partial protection Network operators may wish to support degraded services to optimize network resources and reduce cost We develop a multipath routing scheme to support degraded services in MLR networks, and our illustrative examples show that significant cost savings can be achieved vs full protectionread more
Citations
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Proceedings ArticleDOI
Single-path provisioning with multi-path recovery in flexgrid optical networks
TL;DR: Exhaustive numerical experiments carried out over two network topologies and realistic traffic scenarios show that the efficiency of the proposed SPP-MPR scheme approaches that of restoration mechanisms while providing recovery times as short as protection schemes.
Journal ArticleDOI
Next-Generation Variable-Line-Rate Optical WDM Networks: Issues and Challenges
TL;DR: The major PLIs present in an optical fiber are reviewed, emphasizing those that result in performance degradation of an MLR system and the advance modulation formats that are spectrally efficient and noise resistant are surveyed.
Journal ArticleDOI
On the benefits of multi-path recovery in flexgrid optical networks
TL;DR: Exhaustive numerical experiments show that the efficiency of the proposed MPR scheme approaches that of restoration while providing recovery times as short as protection schemes, and a heuristic algorithm which provides a much better trade-off between optimality and complexity.
Proceedings ArticleDOI
Survivable provisioning in Mixed-Line-Rate networks using multipath routing
TL;DR: This work investigates a computationally-efficient multipath routing scheme for survivable provisioning in Mixed-Line-Rate networks that exploits heterogeneity of multiple rates and guarantees that a specified fraction of the requested bandwidth survives any single-link failure.
Dissertation
Off-line and in-operation optical core networks planning
TL;DR: This thesis proposes a control and management architecture to allow the network to be dynamically operated; network resources can be made available by reconfiguring and/or re-optimizing the network on demand and in real-time.
References
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Book
Optical Network Design and Planning
TL;DR: In this article, the authors focus on how best to perform bundling and protection in the presence of optical-bypass technology in real network environments, and provide guidelines as to when and how optical bypass technology should be deployed.
Journal ArticleDOI
Optical network design with mixed line rates
Avishek Nag,Massimo Tornatore +1 more
TL;DR: This study proposes a novel, cost-effective approach to design a mixed-line-rate (MLR) network with transmission-range (TR) constraint, and shows that, with mixed line rates and maximum transmission range constraints, one can design a cost- effective network.
Journal ArticleDOI
New Strategies for Connection Protection in Mixed-Line-Rate Optical WDM Networks
TL;DR: In this paper, the authors proposed three mechanisms: MLR-at-p-lightpath protection (MLR-p), MLR at lightpath protection, and MLR with backup-flow-grooming protection, which can provide dedicated protection at the lightpath level.
Proceedings ArticleDOI
A Partial-Protection Approach Using Multipath Provisioning
TL;DR: This work proposes an effective multipath algorithm that attempts to provision bandwidth requests while guaranteeing the maximum partial-protection possible, and achieves very low bandwidth blocking probability.
Proceedings ArticleDOI
Dynamic connection provisioning in mixed-line-rate optical networks
TL;DR: Results show that the algorithm can significantly reduce the blocking probability and save the transceivers under tunable node architecture.