Light-trails: a novel conceptual framework for conducting optical communications

Gumaste, Ashwin; Chlamtac, I.

doi:10.1109/hpsr.2003.1226714

Cited by 68 publications

(86 citation statements)

References 4 publications

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“…The light-trail concept in optical networks was first proposed by Gumaste et al in [14,15]. The work presents details about different node architecture to support light-trail concept and procedure to setup light-trail for connection of dynamic in nature and the out-of-band control protocol does the task of connection management, i.e.…”

Section: Previous Workmentioning

confidence: 99%

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Traffic Grooming based on Light-trail in Wavelength Routed Optical Network

2015

International Academy of Engineers (IA-E) April 24-25, 2015 Pattaya (Thailand)

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Abstract-In wavelength routed optical networks, the number of wavelength channels is limited due to technological limitation and each wavelength channel as well as each lightpath support traffic in the Gbps range. In reality, we observe that the majority of individual connection request require a bandwidth in the Mbps range. Therefore, to utilize the network resources like bandwidth, transceivers effectively, we need to be efficiently groomed or multiplexed several low speed traffic requests into a high speed/capacity lightpath. The entire wavelength channel of this lightpath is used exclusively by the source-destination node pair. Data cannot be transmitted or received by the intermediate nodes along the lightpath. Therefore, the wavelength capacity again may be underutilized. To overcome this drawback a novel technique known as light-trail came into existence. The light-trail is a generalized version of the lightpath to avoid the inability of intermediate nodes to use a wavelength connection. In this work, we have investigated the static traffic grooming problem for wavelength routed optical networks. The work proposed a traffic grooming algorithm to maximize the network throughput for wavelength routed mesh optical networks using static light-trail. The effectiveness of the proposed approach has been established through extensive extensive simulation on different sets of traffic demands with different bandwidth granularities for different network topologies and compared the approach with existing algorithms.

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Section: Previous Workmentioning

confidence: 99%

“…Similar to a lightpath, a light-trail is an all optical connection. The light-trail concept in optical networks was first proposed in [14]- [15]. A light-trail can be considered as a generalization of a lightpath leading to multiple users being able to access an optical path resulting in excellent provisioning and resource utilization.…”

Section: Introductionmentioning

confidence: 99%

Traffic Grooming based on Light-trail in Wavelength Routed Optical Network

2015

International Academy of Engineers (IA-E) April 24-25, 2015 Pattaya (Thailand)

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“…The result is that networks using lightpath communication and wavelength routing are over-provisioned leading to expensive network element deployment and not being able to provide the dynamic guarantees of bandwidth provisioning as required by IP centric communication. Light-trails [1][2][3][4][5]10] on the other hand offer a low cost pragmatic alternative by providing dynamic provisioning as compared to rigid lightpath communication. A lighttrail is a generalization of a lightpath such that multiple nodes along the trail can take part in communication without the need for optical switching [5,10].…”

Section: Introductionmentioning

confidence: 99%

“…The protocol shown in [1] also has the added responsibility of light-trail management in addition to the dynamic connection management, whereby it sets up the light-trails, tears them down as well as dimensions (grows/contracts) the set of light-trails as per requirement. The hardware and protocol for light-trails are shown in [1][2][3][4][5]10] for ring and mesh nodes.…”

Section: Introductionmentioning

confidence: 99%

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AbstractIn this paper we address the problem of constrained optimization (ILP formulation) and propose a set of heuristic algorithms for assigning light-trails [1][2][3][4]7,10] to WDM ring networks to facilitate IP centric dynamic communication at the optical layer. A light-trail is a generalization of a lightpath such that multiple nodes can take part in communication along the path without the need for optical switching.

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