A5048870506- Advanced Optical Network Technologies
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Software-Defined Networks and 5G
- Interconnection Networks and Systems
- Photonic and Optical Devices
- Power Line Communications and Noise
- Network Traffic and Congestion Control
- PAPR reduction in OFDM
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced MIMO Systems Optimization
- Advanced Optical Sensing Technologies
- Radio Frequency Integrated Circuit Design
- Optical Wireless Communication Technologies
- Cloud Computing and Resource Management
- Imbalanced Data Classification Techniques
- Anomaly Detection Techniques and Applications
- Coding theory and cryptography
- Quantum Mechanics and Applications
- Business Process Modeling and Analysis
- Electric and Hybrid Vehicle Technologies
- Mobile Agent-Based Network Management
- Neural Networks and Reservoir Computing
- Engineering and Test Systems
Infinera (United States)
2019-2025
Instituto de Telecomunicações
2016-2025
Instituto Superior Técnico
2016-2025
Hospital de Santa Cruz
2019-2023
Infraestruturas de Portugal (Portugal)
2023
University of Lisbon
2007-2023
Hospital IPO
2022
Universidade Federal do Paraná
2022
Instituto Politécnico de Lisboa
2021
University of Minho
2020
Fiber-optic multi-band transmission (MBT) aims at exploiting the low-loss spectral windows of single-mode fibers (SMFs) for data transport, expanding by ~11× available bandwidth C-band line systems and ~5× C+L-band systems'. MBT offers a high potential cost-efficient throughput upgrades optical networks, even in absence dark-fibers, as it utilizes more efficiently existing infrastructures. This represents main advantage compared to approaches such multi-mode/-core or spatial division...
A paradigm shift in optical communication networks is proposed, with the introduction of a new ecosystem devices and components capability transforming current point-to-point (with their entailed, limiting, electrical aggregation) into flexible, scalable cost-effective point-to-multipoint networks. In architecture, which better aligns hub-and-spoke traffic patterns observed today's metro access network segments, interoperability across variety transceivers operating at different speeds...
It is estimated that 5G and the Internet of Things (IoT) will impact traffic, both in volume dynamicity, at unprecedented rates. Thus, to cost-efficiently accommodate these challenging requirements, optical networks must become more responsive changes impacting traffic network state as well operate closely optimality. In this context, knowledge-defined networking (KDN) promises play a paramount role improving flexibility automation. KDN solution introduces reasoning processes machine...
Multi-band (MB) optical transmission promises to extend the lifetime of existing fibre infrastructures, which usually transmit within C-band only, with C+L-band being also used in a few high-capacity links. In this work, we propose physical-layer-aware provisioning scheme tailored for MB systems. This solution utilizes physical layer information estimate, by means generalized Gaussian noise (GGN) model, signal-to-noise ratio (GSNR). The GSNR is evaluated assuming up entire low-loss spectrum...
Spatial-division multiplexing (SDM) and band-division (BDM) have emerged as solutions to expand the capacity of existing C-band wavelength-division (WDM) optical systems deal with increasing traffic demands. An important difference between these two approaches is that BDM enable data transmission over unused spectral bands already-deployed fibers, whereas SDM require availability additional fibers replicate WDM transmission. On other hand, properly design a multiband line system (OLS),...
The various topologies, traffic patterns and cost targets of optical networks have prevented the deployment end-to-end solutions across multi-domains, optimization network as a whole. consequent limitations in flexibility, scalability, adaptability will become increasingly important with new applications, such 5G/6G. Coherent transceivers based on digital subcarrier multiplexing (DSCM) are proposed to address these current constraints. In particular, DSCM allows (i) design high-capacity...
Multiband transmission is a valid option to significantly increase fiber capacity and efficiently utilize the available deployed optical infrastructure. In this contribution, we evaluate its challenges possible implementation.
Acknowledging the predominantly hubbed traffic profile in metro, we apply digital subcarrier multiplexing techniques to 400Gb/s coherent pluggable optics, enabling a point-to-multipoint architecture which shows TCO savings of 76% over five-year period compared traditional based on ROADMs and point-to-point transponder.
Optical communications are the key enabler for ever-increasing traffic growth as they allow multiplexing a number of carriers onto single optical fiber. However, network deployments becoming more challenging due to large bandwidth increments. Indeed, fiber planning process is slow, costly, and strategic activity operators, who must decide where rent or deploy additional capacity. Depending on long-term view, operator will define plan which may require high capital expenditure (CAPEX)...
The massive deployment of 5G and beyond will require high capacity low latency connectivity services, so network operators have either to overprovision in their transport networks or upgrade the optical controllers make decisions nearly real time; both solutions entail capital operational expenditures. A different approach could be move decision making toward nodes subsystems, they can adapt dynamically actual needs thus reduce costs terms energy consumption. To achieve this, several...
Due to the high potential of multi-band transmission (MBT) systems as a short- medium-term solution ever-increasing demand for fiber capacity, one recent areas research concerns development fast but still accurate models estimate quality (QoT) in these systems, since this capability will be paramount efficient and cost-effective network planning operation. However, accurately evaluating QoT MBT with moderate computational complexity is challenging, mainly because stimulated Raman scattering...
Optical wideband communication systems aim at transmitting over several, if not all, of the low-loss windows single-mode fibre, i.e. O-, E-, S-, C-, and L-band. Recently, there has been a clear trend in industry to support additional bands beyond C-band. While C+L-band solutions are close commercialization first products emerging, research focus is shifting supporting also S-band and, finally, whole O- L-band (resulting total transmission bandwidth 365 nm). This contribution highlights...
This paper aims to review the status of standardization activities on black link (BL) and corresponding alien wavelength concepts. It discusses experimental work filterless optical networks conducted within a dedicated Deutsche Telekom project. The general prospects existing challenges concerning elastic extensions BL are also assessed. Furthermore, we present relevant control management plane interoperability comprising generalized multi-protocol label switching transport software defined...
Multi-band optical fiber transmission is generally proposed for capacity upgrades in transport networks. To comprehensively assess the potential of multi-band transmission, key metrics such as increase, energy consumption, and number required interfaces must be evaluated different scenarios. We consider progressive spectral exploitation, starting from C-band only up to C+L+S+U-band both transparent translucent solutions that exploit signal regeneration. By considering accurate...
In aggregation networks, the traffic patterns resemble hub-and-spoke characteristics, with a few hub nodes connecting several leaf to outside of networks. The use traditional point-to-point transceivers in these applications results many low-capacity devices at nodes. Optical leveraging digital subcarrier multiplexing (DSCM) have recently been proposed support point-to-multipoint transmission optical domain, allowing fewer high-capacity nodes, thus significantly reducing both capital...
Multiband (MB) optical fiber transmission systems can unlock additional capacity in existing infrastructures, enabling them to keep up with the increase traffic demand while postponing costly deployments. However, due worse characteristics of MB than C-band-only transmission, network’s overall spectral efficiency decreases when increasing bandwidth. The extent this performance degradation is paramount determining commercial viability deploying systems. By estimating generalized...
In this paper, we discuss the state-of-the-art of components and technology to enable multi-band transmission over single mode fibers (SMFs). A full overview on most relevant challenges is provided.
This paper introduces a novel and simplified cost model for designing evaluating Central Office Rearchitected as Datacenter (CORD). The includes equipment elements the realization of optical, packet switching, data center parts with special focus not only on relative costs but also power consumption figures. is then applied to design comparison metropolitan area network (MAN) including both aggregation metrocore nodes following several MAN node architectures based CORD-like leaf-and-spine...
The development of digital twins to represent the optical transport network might enable multiple applications for operation, including automation and fault management. In this work, we propose a deep-learning-based twin time domain, named OCATA. OCATA is based on concatenation deep neural (DNN) modeling links nodes, which facilitates representing lightpaths. DNNs model linear nonlinear noise, as well filtering. Additional DNN-based models are proposed extract useful lightpath metrics, such...
Nowadays, the fiber spectrum is only partially exploited, i.e., mainly in C-band and more recently C <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mo>+</mml:mo> </mml:math> L-band, where attenuation profile experiences minimum. Thus, communications technology—amplifiers, switching, transceivers, etc.—and networking solutions are mature for those bands. However, continuous increase traffic means that capacity saturation of current infrastructure looming....
This paper proposes an integer linear programming framework to optimize the multi-period planning of metro-aggregation networks exploiting point-to-multipoint coherent pluggable transceivers and a filterless line system architecture. We investigate several strategies minimize capital expenditure caused by transceiver cost based on predictability horizon traffic availability during while considering operational expenses (OpEx) as well. The results obtained evaluating deployed reference...
We propose a novel mathematical model and an efficient heuristic for planning WDM networks with flexible channel-grid shared restoration. The spectral benefits of this approach versus dedicated protection fixed are highlighted.
Emerging trends in optical transport networks aiming to support increasing data rates are reshaping the possibilities for network planning. The deployment of a flexible grid with multiple available channel bit and spectral widths gives way more clearly defined trade-off between spectrum cost planning process. Furthermore, providing redundancy these types services is both crucial costly. For this reason, it important consider all aspects simultaneously order have an accurate view...
Higher-order modulation formats and spectral super-channels are key to maximizing efficiency (SE) in next-generation optical transport networks, thereby postponing/minimizing expensive additional fiber rollouts reconfigurable add/drop multiplexer node upgrades. A flexible dense wavelength division multiplexed (DWDM) grid is efficiently accommodating media channels requiring more (or less) than 50 GHz of contiguous spectrum. In particular, routing consisting multiple adjacent carriers enables...