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Article
Virtual Topology Design and Reconfiguration of Virtual Private Networks (VPNs) over All-Optical WDM Networks
This paper studies the virtual topology design and reconfiguration problem of virtual private networks (VPNs) over all-optical WDM networks. To support VPN service, a set of lightpaths must be established over...
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Article
A Novel Fast Multicast Algorithm with Enhanced Survivability in WDM Optical Networks
WDM optical networking technology is expected to facilitate bandwidth-intensive multicast application by establishing a “light-tree” which regards the source node as the root and all the destination nodes as t...
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Article
Heuristic Algorithms for Grooming of Arbitrary Traffic in WDM Ring Networks
In a wavelength division multiplexing (WDM) network, sub-wavelength traffic streams can be elaborately arranged in wavelength channels to minimize the number of required electronic end systems, known as the tr...
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Article
A Novel Algorithm for Fast Detection of Network Failure
Fast failure detection is critical to traffic protection/restoration in a high-speed network. Generally, the way to detect failures is to periodically exchange keep-alive messages by layer 3 protocols. In trad...
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Article
Grooming of Arbitrary Traffic in Optical WDM Mesh Networks Using a Genetic Algorithm
In this paper, a genetic algorithm is proposed for grooming of arbitrary traffic in optical mesh networks. Traffic streams are routed in the wavelength division multiplexing (WDM) grooming networks that compri...
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Article
Routing and Wavelength Assignment in Optical Networks Using Logical Link Representation and Efficient Bitwise Computation
In this paper, we propose and evaluate a new approach for implementing efficient routing and wavelength assignment (RWA) in wavelength division multiplexing (WDM) optical networks. In our method, the state of ...
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Article
Ant Colony Optimization for Dynamic RWA in WDM Networks with Partial Wavelength Conversion
Dynamic routing and wavelength assignment (RWA), which supports request arrivals and lightpath terminations at random times, is needed for rapidly changing traffic demands in wavelength division multiplexed, (...
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Article
Wavelength assignment with sparse wavelength conversion for optical multicast in WDM networks
This paper addresses the problem of multicast wavelength assignment for sparse wavelength conversion (MWA-SWC) in wavelength-routed wavelength-division-multiplexing (WDM) networks. It aims to optimally allocat...
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Article
Hybrid protection in WDM networks with shared risk link groups
In wavelength-division multiplexing net- works with shared-risk link groups (SRLGs), it remains as a challenge to provide network protections with low-blocking probabilities and short average protection-swi- t...
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Article
Concurrent enhancement of network throughput and fairness in optical burst switching environments
In this article, we propose and evaluate a preemption-based scheme for the concurrent improvement of network throughput and burst fairness in optical burst switched networks. The scheme uses a preemption weigh...
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Article
Connection availability analysis of span-restorable mesh networks
Dual-span failures are the key factor of the system unavailability in a mesh-restorable network with full restorability of single-span failures. Availability analysis based on reliability block diagrams is not...
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Article
Reducing vulnerability of shared-path protection subject to double-link failures in WDM mesh networks
Shared-path protection (SPP) is a capacity- efficient mechanism to provide 100% single-link failure protection in WDM mesh networks. After the first link failure, however, if reconfiguration is unavailable, a ...
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Article
A wavelength-buffering scheme for dynamic traffic in optical wavelength-division multiplexing networks
In optical wavelength-division multiplexing (WDM) networks, traffic can be very “bursty” at a fine time scale, even though it may seem to be smooth at coarser scales (e.g., Poisson or Poisson-related traffic)....
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Article
Performance analysis of an improved soft preemptive scheme for unevenly distributed traffic in optical wavelength-division multiplexing networks
In optical wavelength-division multiplexing (WDM) networks, traffic can be unevenly distributed across the network causing inefficient utilization of resources. To solve this problem, an improved soft preempti...
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Article
Shared partial path protection in WDM networks with shared risk link groups
For 100% shared risk link group (SRLG) failure protection, conventional full path protection has to satisfy SRLG-disjoint constraints, i.e., its working path and backup path cannot go though the same SRLG. Wit...
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Article
Avoidance of multicast incapable branching nodes for multicast routing in WDM networks
In this article we study the multicast routing problem in all-optical WDM networks under the spare light splitting constraint. To implement a multicast session, several light-trees may have to be used due to t...
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Article
A novel multicast routing algorithm in sparse splitting WDM network with power attenuation constraint
With the increasing requirement for communication bandwidth, all-optical network has been more and more important owning to its large traffic capability. Multicasting is an important technology in wavelength d...
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Article
Multicast routing and wavelength assignment with delay constraint in WDM networks with sparse wavelength conversions
With the developments in multimedia and other real-time group applications, the question of how to establish multicast trees satisfying Quality-of-Service (QoS) requirements is becoming a very important proble...
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Article
Hypo-Steiner heuristic for multicast routing in all-optical WDM mesh networks
In sparse light splitting all-optical WDM networks, the more destinations a light-tree can accommodate, the fewer light-trees and wavelengths a multicast session will require. In this article, a Hypo-Steiner l...
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Article
Performance enhancement for impairment-aware SRLG failure protection in wavelength-routed optical networks
With the increase of size and number of shared risk link groups (SRLGs) in WDM networks, path protection tends to have longer working paths and backup paths due to SRLG-disjoint constraints, which makes physic...