HEAnet

We report the first trial of network tomography over a live network in a multi-domain environment. We visualise end-to-end optical powers along multiple routes across multiple domains solely from a commercial 800 G transponder, enabling performance bottleneck localisation, power and routing optimisation, and lightpath provisioning. ©2025 The Author(s)

We demonstrate the end-to-end transmission of digital coherent and analog radio-over-fiber signals, at mmWave and sub-THz frequencies, over the HEAnet live production metro network using Optical Spectrum-as-a-Service (OSaaS), transparently connected to a passive optical network.

Report of meeting held on 10th February 2023 between Hanne-Louise Kirkegaard and Karen Hytteballe Ibanez (Danish Open Access Indicator); Fran Callaghan, Caleb Derven, Eoin Kenny, Kevin Kiely and Andrew Simpson (National Open Access Monitor Project Advisory Group); and Catherine Ferris (National Open Access Monitor Project Manager). This report is a project deliverable as detailed in the National Open Access Monitor project plan action to "Consult with the providers of the Danish and French national monitoring solutions and create a report which documents their advice, lessons learnt, and methods/tools that could be adapted or reused in the Irish context." This project is managed by IReL and has received funding from Ireland’s National Open Research Forum under the NORF Open Research Fund. https://norf.ie/funding/ https://norf.ie/orf-projects-announcement/

Abstract During the last years, a trend has emerged at universities, large enterprises, government institutions, hospitals and public institutions towards acquiring and deploying their own dark-fibre or wavelength networks as opposed to purchasing bandwidth network services from the traditional operators. These institutions usually follow the condominium model to build and deploy their network. The parties get together in a joint effort to purchase the network equipment and deploy the dark fibre. Each institution gets a subset of the deployed fibre and part of the available ports, proportional to their initial investment. However, each institution manages their resources independently of the other organisations that share the physical substrate. Traditional control plane architectures cannot address the requirements of this type of networks, because they assume a single entity has administrative control of all the network elements in a physical domain.At the same time, a new set of bandwidth-intensive applications are emerging. e-Science applications, Grid applications and high-definition digital media streaming produce such a big amount of data that often justifies dedicating a network to a single application. In order to efficiently manage the resources, these applications must be able to configure the network in the way it better suits their needs.In response to these requirements, the user-controlled light paths (UCLP) concept, described in Sect. 2, allows a network to be partitioned in several independent management domains and exposes the network resources belonging to each partition as software objects or services under the control of different users. The UCLP results have evolved into Argia (Sect. 3), which is an effort towards creating a commercial product that can be deployed in production optical networks. UCLP and related works are the precursors of infrastructure as a service (IaaS) applied to networks and are changing the way network pieces are being acquired. For making the UCLP concept flexible to any kind of resources, the IaaS Framework (Sect. 4) addresses the need to have a unified framework using enterprise-grade tools and libraries in which new resources can quickly and easily be created. Finally, Sect. 5 introduces the multidomain provisioning systems and the Harmony implementation, an inter-domain broker solution for providing bandwidth-on-demand services over different administrative domains controlled by different local resource managers.KeywordsOptical NetworkNetwork ResourceNetwork ElementGrid ApplicationAdvance ReservationThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

The arising opportunity exposed in this paper is leveraging the capabilities of network virtualization to provide a whole IP Network as a Service (NaaS). Users are offered the capability to customize the policies, the configuration and the management on their allocated virtual network to meet their own requirements. Following the NaaS paradigm, the European Community funded project Mantychore is developing and providing an IP NaaS framework to enhance the service portfolio of National Research and Education Networks (NRENs) and other e-Infrastructure providers. This paper, as a particular use case of the project, describes how NaaS could benefit Customer Premises Equipment (CPE) deployment. Two CPE scenarios discussed are: the Aggregated Virtual CPE and the Multiple Networks Virtual CPE. The benefits of these scenarios go from equipment purchasing cost to operations expenses and efficiencies.

The joint research activity 3 of the European project GN2 is specifying and prototyping a bandwidth on demand service due to operate on a multi-domain environment with heterogeneous transmission technologies. The paper reviews keys achievements and highlights current research and development areas with a particular focus on inter-domain issues.