Abstract
The horseshoe topology is widely used to realize metro-aggregation networks, since it provides a natural fit to the hub-and-spoke traffic pattern present in the majority of these deployments, while enabling survivability against single link and hub failures. A filterless architecture can also be adopted to further reduce capital expenditure (CapEx) by replacing active elements, such as reconfigurable add/drop multiplexers, with simpler and passive splitters/combiners. Such an architecture can effectively host coherent-based point-to-multipoint (P2MP) transceivers enabled by digital subcarrier multiplexing (DSCM). Importantly, by carefully optimizing the deployment of amplifiers (location and gain) and splitters/combiners (type), it may be possible to reduce the total number of optical amplifiers required, further decreasing CapEx. This paper proposes an integer linear programming framework to optimize metro-aggregation filterless horseshoe networks, taking into account the specific requirements of DSCM-based P2MP coherent transceivers. The results indicate that a considerable reduction in amplifier count is possible while ensuring that end-to-end performance thresholds are met, which include the minimum required input power at the receivers, a maximum subcarrier input power difference at the hub’s receivers, and the minimum optical-signal-to-noise ratio.
Original language | English |
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Pages (from-to) | 569-578 |
Number of pages | 10 |
Journal | Journal of Optical Communications and Networking |
Volume | 15 |
Issue number | 9 |
Early online date | 2 Aug 2023 |
DOIs | |
Publication status | Published - 1 Sept 2023 |
Bibliographical note
Copyright © 2023 Optica Publishing Group. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.Funding Information:
H2020 Marie Skłodowska-Curie Actions (813144); Engineering and Physical Sciences Research Council (Transnet); European Commission H2020 B5G-OPEN (101016663); Fundacao para a Ciencia e a Tecnologia (50008).
Keywords
- Transceivers
- Passive optical networks
- Point-to-multipoint communications
- Topology
- Network topology
- Optical receivers
- Multiplexing