Journal ArticleDOI
Design and analysis of partial protection mechanisms in groomed optical WDM mesh networks
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TLDR
The mechanism proposed to counter backup contention is seen to provide an average of 120% reduction in the contention among backup paths of connections traversing a link, especially when the number of wavelengths in each link is small.Abstract:
We consider the problem of survivable network design in traffic-groomed optical WDM mesh networks that support subwavelength capacity connections. In typical survivable network designs, individual sessions are provided either full protection or no protection. We consider a quality of protection (QoP) framework where a connection is provided partial protection, i.e., when a link failure occurs on the primary path, the protection bandwidth provided on the backup path is less than or equal to the primary bandwidth. Each connection request specifies the primary bandwidth and a minimum backup bandwidth required. The network will guarantee at least the minimum backup bandwidth and, if capacity is available, higher backup bandwidth up to the primary path's bandwidth. The advantage of such a model is that it can reduce backup capacity requirements based on connection needs leading to lower blocking probability and lower network costs. We consider two scenarios: (i) a network with static traffic that is designed using an integer linear program (ILP) formulation and (ii) a network with dynamic traffic for which we present a heuristic connection admission control algorithm that prevents backup resource contention during recovery from a link failure. The results quantify the gain in blocking probability for different partial protection scenarios. The mechanism proposed to counter backup contention is seen to provide an average of 120% reduction in the contention among backup paths of connections traversing a link, especially when the number of wavelengths in each link is small.read more
Citations
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Journal ArticleDOI
Degraded service provisioning in mixed-line-rate WDM backbone networks using multipath routing
TL;DR: This work proposes a mixed-integer-linear-program (MILP) solution and a computationally efficient heuristic, and considers two partial-protection models to support degraded services in mixed-line-rate networks.
Proceedings ArticleDOI
Degraded services in mixed-line-rate networks using multipath routing
TL;DR: 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.
Proceedings ArticleDOI
Efficient protection and grooming architectures for future optical networks
TL;DR: It is proposed that the main traffic types of today's applications should be carried using the following features: connection-oriented service, traffic grooming to fill those connection oriented pipes, and forward error recovery with protection provided in the physical layer.
Journal ArticleDOI
A new approach for fast segment-based protection in WDM mesh networks
Yu Lin,Haitham S. Hamza +1 more
TL;DR: The proposed SPXP algorithm reduces the recovery time by ensuring that backup resources are pre‐configured along each backup segment and, hence, is readily available upon a failure.
Proceedings ArticleDOI
Efficient protection and grooming architectures for future optical networks
TL;DR: It is proposed that the main traffic types of today's applications should be carried using the following features: connection-oriented service, traffic grooming to fill those connection oriented pipes, and forward error recovery with protection provided in the physical layer.
References
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Proceedings ArticleDOI
Enabling subwavelength level traffic grooming in survivable WDM optical network design
Jing Fang,Arun K. Somani +1 more
TL;DR: This paper addresses problem of enabling traffic grooming in mesh survivable WDM optical network design by employing backup multiplexing and dedicated backup reservation with minimizing the total link-primary-sharing.
Journal ArticleDOI
Span-Restorable Mesh Networks with Multiple Quality of Protection (QoP) Service Classes**
TL;DR: Design models for optimal capacity design of span-restorable mesh networks having any particular mixture of four basic “quality of protection” (QoP) classes are given and can be used by network and business planners to evaluate a number of different service structuring, pricing, and capacity-design strategies that may offer advantages to them and new options for their customers.
Journal ArticleDOI
Differentiated reliability (DiR) in wavelength division multiplexing rings
Andrea Fumagalli,Marco Tacca +1 more
TL;DR: The concept of differentiated reliability (DiR) is formally introduced in the paper and applied to provide multiple reliability degrees (or classes) at the same network layer using a common protection mechanism, i.e., path switching.
Journal ArticleDOI
Dynamic provisioning of availability-constrained optical circuits in the presence of optical node failures
TL;DR: In this article, the authors investigated the impact of optical node failures on WDM networks, in which reliable end-to-end optical circuits are provisioned dynamically using proven component level availability models.
Proceedings ArticleDOI
A New Protection Paradigm for Digital Video Distribution Networks
Ornan Gerstel,Galen Sasaki +1 more
TL;DR: A protection scheme is proposed that can be applied to video distribution networks and instead of fully protecting affected High Definition TV connections it provides reduced bandwidth that suffices for Standard Definition TV.
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