Lightpath admission control and rerouting in dynamic flex‐grid optical transport networks

Sousa, Amaro de; Monteiro, Paulo P.; Lopes, Célia

doi:10.1002/net.21715

Cited by 10 publications

(3 citation statements)

References 36 publications

(44 reference statements)

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“…In large networks the management of the required network resources may be tedious as different NMSs may need to be monitored to keep track of available resources. SDN helps to cut down the use of multiple network EMSs which are usually due to the use of different network equipment from different vendors to a single centralised controller [21]. However, it has been shown that the SDN centralised controller approach suffers from the single point of failure problem [22].…”

Section: Lightpath Admission Controlmentioning

confidence: 99%

Towards programmable on‐demand lightpath services: current state‐of‐the‐art and open research areas

et al. 2019

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With emerging programmable network architectures gaining momentum in the networking industry, it is necessary to look at how the services currently offered on traditional network architectures can be fully migrated to the programmable networks. In traditional networks, lightpaths are used for providing high-bandwidth consuming services that are usually sensitive to delay. Lightpath scheduling requires admission control mechanisms, routing and wavelength assignment algorithms, and protection and restoration mechanisms that ensure reliable and efficient lightpath routing. Software defined networking (SDN) is the emerging programmable network architecture that paves the way for easier network management and configuration by using application programming interfaces. The state-of-the-art in lightpath routing for wavelength division multiplexing networks focusing on lightpath scheduling, routing, protection and restoration in optical software defined networks is surveyed. Moreover, open research issues for SDN lightpath routing solution are discussed.

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Section: Lightpath Admission Controlmentioning

confidence: 99%

Towards programmable on‐demand lightpath services: current state‐of‐the‐art and open research areas

et al. 2019

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“…During the last decade, the attention of the telecommunication community has been concentrated on Routing and Wavelength Assignment (RWA) and Routing and Spectrum Allocation (RSA) problems. Consequently, numerous exact and heuristic methods are now available to solve RWA and RSA problems in static [9][10][11] and dynamic [12][13][14] environment. However, so far the relevance of the inner optical node architecture in the DWDM network optimization has not been fully considered.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Optical Networks Based on CDC-ROADM Technology

2019

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New generation of optical nodes in dense wavelength division multiplexed networks enables operators to improve service flexibility and make significant savings, both in operational and capital expenditures. Thus the main objective of the study is to minimize optical node resources, such as transponders, multiplexers and wavelength selective switches, needed to provide and maintain high quality dense wavelength division multiplexed network services using new generation of optical nodes. A model based on integer programming is proposed, which includes a detailed description of an optical network node. The impact on the network performance of conventional reconfigurable optical add drop multiplexer technology is compared with colorless, directionless and contentionless approaches. The main focus of the presented study is the analysis of the network congestion problem arising in the context of both reconfigurable optical add drop multiplexer technologies. The analysis is supported by results of numerical experiments carried out for realistic networks of different dimensions and traffic demand sets.

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“…De Sousa et al consider dynamic flex‐grid optical transport networks where lightpath (L‐P) admission control (LAC) is the task of finding a routing and spectrum assignment (RSA), if any, for the current L‐P request. When rerouting is supported, one or more currently established L‐Ps can be rerouted and/or assigned a different spectrum in order to accommodate the current L‐P request.…”

mentioning

confidence: 99%