Spectrum Configuration Framework for Throughput Maximization in Open Systems with Roll-Off-Based QoT Optimization
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arXiv
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| Format: | Preprint |
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2026
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| author | Pahlevanzadeh, Peyman Garbhapu, Venkata Virajit Raj, Agastya Briantcev, Dmitrii Kilper, Dan Ruffini, Marco |
| author_facet | Pahlevanzadeh, Peyman Garbhapu, Venkata Virajit Raj, Agastya Briantcev, Dmitrii Kilper, Dan Ruffini, Marco |
| contents | We propose a spectrum-configuration framework for open and disaggregated optical systems that maximizes throughput while guaranteeing the quality of transmission (QoT) margins. The framework jointly optimizes transceiver parameters, including modulation format, symbol rate, pulse-shaping roll-off factor, and wavelength-selective switch (WSS) bandwidth, under fixed spectral allocation constraints. The impact of roll-off factor optimization is first experimentally evaluated in the presence of cascaded WSS filtering, demonstrating measurable QoT gains for both single- and multi-channel transmission. Building on these observations, a knapsack-based optimization is applied in the context of Optical Spectrum as a Service (OSaaS) to select service configurations that maximize aggregate throughput within a fixed spectrum width and limited transceiver resources. Experimental validation on a metro-scale open testbed confirms the effectiveness of the proposed approach in achieving efficient spectrum utilization and adaptive throughput-margin trade-offs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_18374 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spectrum Configuration Framework for Throughput Maximization in Open Systems with Roll-Off-Based QoT Optimization Pahlevanzadeh, Peyman Garbhapu, Venkata Virajit Raj, Agastya Briantcev, Dmitrii Kilper, Dan Ruffini, Marco Networking and Internet Architecture We propose a spectrum-configuration framework for open and disaggregated optical systems that maximizes throughput while guaranteeing the quality of transmission (QoT) margins. The framework jointly optimizes transceiver parameters, including modulation format, symbol rate, pulse-shaping roll-off factor, and wavelength-selective switch (WSS) bandwidth, under fixed spectral allocation constraints. The impact of roll-off factor optimization is first experimentally evaluated in the presence of cascaded WSS filtering, demonstrating measurable QoT gains for both single- and multi-channel transmission. Building on these observations, a knapsack-based optimization is applied in the context of Optical Spectrum as a Service (OSaaS) to select service configurations that maximize aggregate throughput within a fixed spectrum width and limited transceiver resources. Experimental validation on a metro-scale open testbed confirms the effectiveness of the proposed approach in achieving efficient spectrum utilization and adaptive throughput-margin trade-offs. |
| title | Spectrum Configuration Framework for Throughput Maximization in Open Systems with Roll-Off-Based QoT Optimization |
| topic | Networking and Internet Architecture |
| url | https://arxiv.org/abs/2604.18374 |