Proceedings ArticleDOI
Network studies in IP/optical layer restoration
S. Phillips,N. Reingold,Robert Doverspike +2 more
- pp 425-427
TLDR
In this article, it was shown that integrated IP/OL restoration of span failures can give substantial benefits over restoration by either layer alone, depending on the single or dual router office architectures and pre and post-failure IP-layer link utilization levels.Abstract:
Even though transport of an equivalent amount of bandwidth at the IP layer is much more expensive than at the optical layer, it is not universally true that restoration of span failures is less expensive when provided at the optical layer. Some critical factors that determine this are single or dual router office architectures and pre and post-failure IP-layer link utilization levels. Furthermore, it was shown that integrated IP/OL restoration can give substantial benefits over restoration by either layer alone.read more
Citations
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Journal ArticleDOI
Switched optical backbone for cost-effective scalable core IP networks
TL;DR: It is shown that contrary to common wisdom, IP over OTN can lead to substantial reduction in capital expenditure through reduction of expensive transit IP router ports, and the savings increases rapidly with the number of nodes in the network and traffic demand between nodes.
Journal ArticleDOI
Realizing the advantages of optical reconfigurability and restoration with integrated optical cross-connects
J. Strand,Angela L. Chiu +1 more
TL;DR: In this paper, an architecture based on optical cross-connects (OXCs) integrated with the WDM (IOXCs), and one instantiation of this architecture using a class of degree-N optical add/drop multiplexers (OADMs), is proposed to provide efficient shared capacity path-based restoration after link failures.
Journal ArticleDOI
Survivable MPLS Over Optical Transport Networks: Cost and Resource Usage Analysis
TL;DR: It is demonstrated that by mapping efficiently the spare capacity of the MPLS layer onto the resources of the optical layer one can achieve up to 22% savings in the total configuration cost and up to 37% in the Optical layer cost.
Journal ArticleDOI
Multi-Layer Network Performance and Reliability Analysis
TL;DR: The authors describe a methodology for evaluating the performability (combined performance and reliability) of large communications networks and have developed a network analysis tool called nperf that embodies this methodology.
Proceedings ArticleDOI
Handling IP traffic surges via optical layer reconfiguration
TL;DR: This work proposed a simple method to handle IP-layer traffic surges by rapidly augmentingIP-layer link capacity over a rapidly reconfigurable optical cross-connect layer by analyzing the statistical properties of actual traffic surges in a large ISP network.
References
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Proceedings ArticleDOI
Fast restoration in a mesh network of optical cross-connects
TL;DR: In this paper, a distributed restoration method for mesh networks of optical cross-connects (OXCs) is proposed, which is especially adapted to OXCs with optic fabrics where electronic signal performance or fault detection is available only at add/drop ports.
Proceedings ArticleDOI
Transport network architectures in an IP world
TL;DR: It is found that an all-IP architecture could offer much greater network efficiency and considerable capital savings, and how technology must evolve to support such an architecture is examined.
Book ChapterDOI
Algorithms for Restoration Planning in a Telecommunications Network
TL;DR: An experimental study comparing two techniques for restoration capacity planning with a fast heuristic called LOCAL finds that column generation produces networks whose restoration capacity cost is 10% to 16% less than those produced by LOCAL.