| 1. |
- Yan, Li, 1988, et al.
(författare)
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Regenerator Allocation in Nonlinear Elastic Optical Networks With Random Data Rates
- 2018
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Ingår i: 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings. - 9781943580385
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Konferensbidrag (refereegranskat)abstract
- We optimize the regenerator allocation in nonlinear elastic networks whose traffic demands have random data rates. Compared with previous regenerator allocation algorithms, our method achieves the same blocking probability with 11% fewer regenerator sites.
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| 2. |
- Dharmaweera, Madushanka Nishan, 1986, et al.
(författare)
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An impairment-aware resource allocation scheme for dynamic elastic optical networks
- 2017
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Ingår i: Optics InfoBase Conference Papers. - 2162-2701. - 9781943580231 ; Part F40
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Konferensbidrag (refereegranskat)abstract
- By using impairment-driven variable guardbands, our proposed dynamic resource allocation scheme accommodates 50% more traffic in comparison to existing fixed transmission-reach- and guardband-based algorithms.
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| 3. |
- Dharmaweera, Madushanka Nishan, 1986, et al.
(författare)
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Nonlinear-Impairments- and Crosstalk-Aware Resource Allocation Schemes for Multicore-Fiber-based Flexgrid Networks
- 2016
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Ingår i: ECOC 2016; 42nd European Conference on Optical Communication; Proceedings of. - 9783800742745
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Konferensbidrag (refereegranskat)abstract
- Abstract: In this study, we propose a novel spectrum and core allocation scheme that incorporates both intra-core physical layer impairments and inter-core crosstalk. We demonstrate that accounting for the latter increases spectral efficiency by at least 50% when crosstalk is significant.
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| 4. |
- Dharmaweera, Madushanka Nishan, 1986, et al.
(författare)
-
Regenerator site selection in impairment-aware elastic optical networks
- 2016
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Ingår i: 2016 Optical Fiber Communications Conference and Exhibition (OFC). Anaheim, CA, MAR 20-24, 2016. - 9781943580071
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Konferensbidrag (refereegranskat)abstract
- We propose a novel regenerator site selection scheme for nonlinear impairment-aware elastic optical networks. The proposed scheme reduces bandwidth use by up to 40% in a realistic network by employing only 6 regenerator sites.
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| 5. |
- Dharmaweera, Madushanka Nishan, 1986, et al.
(författare)
-
Traffic-grooming- and multipath-routing-enabled impairment-aware elastic optical networks
- 2016
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Ingår i: Journal of Optical Communications and Networking. - 1943-0620 .- 1943-0639. ; 8:2, s. 58-70
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Tidskriftsartikel (refereegranskat)abstract
- Traffic grooming and multipath routing are two techniques that are widely adopted to increase the performance of traditional wavelength division multiplexed networks. They have been recently applied in elastic optical networks to increase spectral efficiency. In this study, we investigate the potential gains by jointly employing the two techniques in combination with a realistic physical impairment model. To allocate resources and quantify spectral efficiency gains over existing impairment-aware schemes, we present an analytical optimization formulation for small networks and a heuristic for large networks. Through numerical simulations, we demonstrate that traffic grooming and multipath routing, together, increase spectral efficiency and reduce resource consumption over existing schemes. We show that the proposed scheme offers significant performance improvements in networks with low degrees of connectivity, high traffic loads, and long links.
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| 6. |
- Yan, Li, 1988, et al.
(författare)
-
Joint Assignment of Power, Routing, and Spectrum in Static Flexible-Grid Networks
- 2017
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Ingår i: Journal of Lightwave Technology. - : Institute of Electrical and Electronics Engineers (IEEE). - 0733-8724 .- 1558-2213. ; 35:10, s. 1766-1774
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Tidskriftsartikel (refereegranskat)abstract
- This paper proposes a novel network planning strategy to jointly allocate physical layer resources together with the routing and spectrum assignment in transparent nonlinear flexible-grid optical networks with static traffic demands. The physical layer resources, such as power spectral density, modulation format, and carrier frequency, are optimized for each connection. By linearizing the Gaussian noise model, both an optimal formulation and a low complexity decomposition heuristic are proposed. Our methods minimize the spectrum usage of networks, while satisfying requirements on the throughput and quality of transmission. Compared with existing schemes that allocate a uniform power spectral density to all connections, our proposed methods relax this constraint and, thus, utilize network resources more efficiently. Numerical results show that by optimizing the power spectral density per connection, the spectrum usage can be reduced by around 20% over uniform power spectral density schemes.
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| 7. |
- Yan, Li, 1988, et al.
(författare)
-
Regenerator Site Predeployment in Nonlinear Dynamic Flexible-Grid Networks
- 2017
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Ingår i: European Conference on Optical Communication, ECOC.
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Konferensbidrag (refereegranskat)abstract
- A regenerator predeployment algorithm is proposed in dynamic translucent flexible-grid networks based on the GN model. The randomness of traffic bandwidth requests is exploited to allocate regenerators efficiently. Our method accommodates 30% more demands than benchmark methods.
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