A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical Networks
To exploit the capacity introduced by elastic optical networks, efficient algorithms must be developed. Efficient modulation techniques have limited reach, so for distant destination nodes, the regeneration of a signal at a few intermediary nodes along the lightpath can effectively reduce the spectr...
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doaj-792a5504450c4c778d5c3832652d08b82021-03-30T02:40:54ZengIEEEIEEE Access2169-35362020-01-018379023791310.1109/ACCESS.2020.29756219006849A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical NetworksMehdi Tarhani0https://orcid.org/0000-0002-7417-8536Morad Khosravi Eghbal1https://orcid.org/0000-0001-8618-2017Mehdi Shadaram2https://orcid.org/0000-0002-2169-1985Department of Electrical and Computer Engineering, The University of Texas at San Antonio, San Antonio, TX, USADepartment of Electrical and Computer Engineering, The University of Texas at San Antonio, San Antonio, TX, USADepartment of Electrical and Computer Engineering, The University of Texas at San Antonio, San Antonio, TX, USATo exploit the capacity introduced by elastic optical networks, efficient algorithms must be developed. Efficient modulation techniques have limited reach, so for distant destination nodes, the regeneration of a signal at a few intermediary nodes along the lightpath can effectively reduce the spectrum utilization and offset the extra cost, in terms of overall transceiver use, introduced by enabling the regeneration. In the context of multicast provisioning, although regeneration can be complex, it, in turn, due to its flexibility, further emphasizes the advantage of tree based routing over serving individual destinations. In this paper, we investigate the problem of routing, modulation level, spectrum allocation, and regenerator placement (RMSA-RP) for multicast provisioning, which, to the best of our knowledge, has not been previously addressed in the literature. Accordingly, we present a networking model through comprehensive integer linear programming, jointly enabling a routing method based on a subtree scheme as well as assigning a few nodes as regenerators of the signal. By means of an algorithm, we also propose a scalable framework to address RMSA-RP when the network is in operation. This algorithm implements a dynamic and automatic geographic partitioning of the destination nodes and then forms the corresponding subtree structures. Constraints taken into account include wavelength contiguity, wavelength continuity, and light splitting that affects the reach of the modulation techniques. Extensive simulation results show that the model can effectively support a greater number of demands without increasing transceiver use.https://ieeexplore.ieee.org/document/9006849/Elastic optical networksmodulationmulticastregeneration placementroutingspectrum allocation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mehdi Tarhani Morad Khosravi Eghbal Mehdi Shadaram |
spellingShingle |
Mehdi Tarhani Morad Khosravi Eghbal Mehdi Shadaram A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical Networks IEEE Access Elastic optical networks modulation multicast regeneration placement routing spectrum allocation |
author_facet |
Mehdi Tarhani Morad Khosravi Eghbal Mehdi Shadaram |
author_sort |
Mehdi Tarhani |
title |
A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical Networks |
title_short |
A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical Networks |
title_full |
A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical Networks |
title_fullStr |
A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical Networks |
title_full_unstemmed |
A Layered Subtree Scheme for Multicast Communications in Large-Scale Elastic Translucent Optical Networks |
title_sort |
layered subtree scheme for multicast communications in large-scale elastic translucent optical networks |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2020-01-01 |
description |
To exploit the capacity introduced by elastic optical networks, efficient algorithms must be developed. Efficient modulation techniques have limited reach, so for distant destination nodes, the regeneration of a signal at a few intermediary nodes along the lightpath can effectively reduce the spectrum utilization and offset the extra cost, in terms of overall transceiver use, introduced by enabling the regeneration. In the context of multicast provisioning, although regeneration can be complex, it, in turn, due to its flexibility, further emphasizes the advantage of tree based routing over serving individual destinations. In this paper, we investigate the problem of routing, modulation level, spectrum allocation, and regenerator placement (RMSA-RP) for multicast provisioning, which, to the best of our knowledge, has not been previously addressed in the literature. Accordingly, we present a networking model through comprehensive integer linear programming, jointly enabling a routing method based on a subtree scheme as well as assigning a few nodes as regenerators of the signal. By means of an algorithm, we also propose a scalable framework to address RMSA-RP when the network is in operation. This algorithm implements a dynamic and automatic geographic partitioning of the destination nodes and then forms the corresponding subtree structures. Constraints taken into account include wavelength contiguity, wavelength continuity, and light splitting that affects the reach of the modulation techniques. Extensive simulation results show that the model can effectively support a greater number of demands without increasing transceiver use. |
topic |
Elastic optical networks modulation multicast regeneration placement routing spectrum allocation |
url |
https://ieeexplore.ieee.org/document/9006849/ |
work_keys_str_mv |
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