Optical Metro Network Design with Low Cost of Equipment

Karandin, Oleg; Ayoub, Omran; Ibrahimi, Memedhe; Musumeci, Francesco; Castoldi, A.; Pastorelli, R.; Tornatore, Massimo

doi:10.23919/ondm51796.2021.9492458

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…11 shows the total number of EDFAs deployed at network nodes by the considered approaches in the highest loaded traffic scenario for the three networks. To investigate the impact of line amplifier spacing and input power thresholds, we consider the scenarios with amplifier spacing values of 60, 75, and 100 km, and amplifier input power thresholds of -12, -15 and -18 dBm, as reported in the literature (e.g., [45]). The nodes in FONs and WSONs are hard-wired, with preamplifiers and boosters placed at each ingress and egress port, as shown in Fig.…”

Section: German Networkmentioning

confidence: 99%

Programmable Filterless Optical Networks: Architecture, Design, and Resource Allocation

Etezadi,

Natalino,

Tremblay

et al. 2024

IEEE/ACM Trans. Networking

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Filterless optical networks (FONs) are a costeffective optical networking technology that replaces reconfigurable optical add-drop multiplexers, used in conventional, wavelength-switched optical networks (WSONs), by passive optical splitters and couplers. FONs follow the drop-and-waste transmission scheme, i.e., broadcast signals without filtering, which generates spectrum waste. Programmable filterless optical networks (PFONs) reduce this waste by equipping network nodes with programmable optical white box switches that support arbitrary interconnections of passive elements. Cost-efficient PFON solutions require optimal routing, modulation format and spectrum assignment (RMSA) to connection requests, as well as optimal design of the node architecture. This paper presents an optimization framework for PFONs. We formulate the RMSA problem in PFONs as a single-step integer linear program (ILP) that jointly minimizes the total spectrum and optical component usage. As RMSA is an NP-complete problem, we propose a two-step ILP formulation that addresses the RMSA sub-problems separately and seeks sub-optimal solutions to larger problem instances in acceptable time. Simulation results indicate a beneficial trade-off between component usage and spectrum consumption in proposed PFON solutions. They use up to 64% less spectrum than FONs, up to 84% fewer active switching elements than WSONs, and up to 81% fewer optical amplifiers at network nodes than FONs or WSONs.

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Section: German Networkmentioning

confidence: 99%

Programmable Filterless Optical Networks: Architecture, Design, and Resource Allocation

Etezadi,

Natalino,

Tremblay

et al. 2024

IEEE/ACM Trans. Networking

View full text Add to dashboard Cite

show abstract

“…The path computation derives optimal transmission parameters and a route for each optical path, for example, using GNPy. At this stage, the optimal values of the gain of the cascaded optical amplifiers should be carefully recalculated so that addition or deletion of optical paths and changes in output power from transmitters do not affect the transmission quality of other existing optical paths [15][16][17][18]. In the second method, an SDN controller generates optical paths in a real or physical domain according to the results of the path computation.…”

Section: Related Workmentioning

confidence: 99%

Photonic Gateway and Protocol-Independent End-to-End Optical-Connection Provisioning in All-Photonic Metro-Access Converged Network

et al. 2023

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The All-Photonics Metro-Access Converged Network (APN) aims to achieve a flat and simple architecture that even covers access areas and represents the evolution of optical transport. Electrical processing functions such as exchange, multiplexing, and switching are uniformly placed at the border of the network segments, i.e., access, metro, and core networks, in current optical networks. These functions are placed in Data Centric Infrastructure (DCI) and accessed only when needed in the APN. By flexibly providing direct optical connections between user premises and/or DCI according to requests from users and services, the APN creates new types of use cases requiring end-to-end guaranteed wide-bandwidth and/or extremely low latency and jitter along with an information-computing platform. To provide optical paths originating from user terminals that launch client signals using protocols preferable to their applications, we propose a configuration for a novel optical edge node, the Photonic Gateway (GW), and a procedure based on remote control of user terminals to establish end-to-end optical paths that are independent of the client signal protocol. To verify these, we present results of a proof-of-concept experimental demonstration of establishing end-to-end optical paths. An auxiliary management control channel is employed in the protocol-independent access control method. We also describe future challenges facing the Photonic GW that must be addressed.

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Innovative Cross-Layer Optimization Techniques for the Design of Optical Networks

Ibrahimi

2024

SpringerBriefs in Applied Sciences and Technology

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Optical networks have become indispensable in the era of 5G-and-beyond communications, supporting applications that require unprecedented capacity, reliability, and high Quality-of-Transmission (QoT) of lightpaths. To meet these requirements, network operators strive to provide innovative solutions while managing network costs effectively. This work summarizes the main findings of my Ph.D. thesis Innovative Cross-Layer Optimization Techniques for the Design of Filterless and Wavelength-Switched Optical Networks, that has been conducted in partnership with an industrial partner, SM-Optics. The main objective of the Ph.D. thesis is to investigate solutions to reduce network costs while enabling network expandability through novel network architectures. To ensure cost savings and scalability, (1) we optimize the deployment of Optical Amplifiers (OA) while accurately modeling physical layer impairments in filterless networks, (2) we propose a modular node architecture relying on pluggable devices and a scalable add/drop section at the node level for traffic grooming and capacity increase, and (3) we investigate the application of Machine Learning (ML)—regression approaches to estimate lightpaths’ QoT as they allow to make informed decisions about how conservative or aggressive a network operator can be when taking network planning choices, i.e., deploying a new lightpath. Numerical evaluations show that our proposed approaches achieve significant cost savings compared to benchmark approaches: (1) $${\sim }50\%$$ ∼ 50 % savings in OA cost, (2) $${\sim }50\%$$ ∼ 50 % savings in node architecture equipment cost, (3) $${\sim }70\%$$ ∼ 70 % in penalty costs for deploying wrong lightpath configurations.

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Optical Metro Network Design with Low Cost of Equipment

Cited by 8 publications

References 10 publications

Programmable Filterless Optical Networks: Architecture, Design, and Resource Allocation

Programmable Filterless Optical Networks: Architecture, Design, and Resource Allocation

Photonic Gateway and Protocol-Independent End-to-End Optical-Connection Provisioning in All-Photonic Metro-Access Converged Network

Innovative Cross-Layer Optimization Techniques for the Design of Optical Networks

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