What makes this breakthrough possible<\/p>\n
To understand the significance of this trial, we need to break down its technological foundations into accessible terms.<\/p>\n
Multicore fibres and spatial division multiplexing<\/p>\n
Traditional fibre optic cables carry light through a single glass core. Multicore fibres (MCFs) contain multiple cores within the same cladding, allowing several light paths to coexist without interference. This approach, known as spatial division multiplexing (SDM), dramatically increases capacity without laying additional cables. It\u2019s a bit like replacing a one-lane highway with a multi-lane expressway: more traffic can flow without expanding the road\u2019s footprint.<\/p>\n
Passive Optical Networks (PONs)<\/p>\n
PONs are widely used in fibre-to-the-home deployments, where a single optical line terminal (OLT) at the provider\u2019s side serves multiple users through passive splitters. The innovation here is the spatial PON, which can dynamically activate or deactivate lanes within the multicore fibre. When user demand increases, more \u2018lanes\u2019 are opened; when demand falls, unused lanes are turned off to save power.<\/p>\n
![\"\"](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2025\/10\/CONSORZ2-29700-shutterstockTechAnimationStock_2465034603-300x169.jpg\")
\u00a9 shutterstock\/TechAnimationStock
\nOpen RAN and distributed units<\/p>\n
In mobile networks, radio access traditionally comes from proprietary, tightly integrated equipment. Open RAN (O-RAN) breaks this model into interoperable components, such as the radio unit (RU) and the distributed unit (DU), managed by an intelligent controller. By monitoring real-time traffic, the system can activate extra small cells only when needed \u2014 for example, when multiple VR headsets come online simultaneously.<\/p>\n
Edge computing<\/p>\n
Instead of routing all data to distant data centres, edge computing brings processing power closer to the users. For AR\/VR, this is critical: even a fraction of a second of delay can ruin immersion. In the trial, VR applications were hosted at the edge, allowing real-time rendering with minimal latency.<\/p>\n
Orchestration and closed-loop control<\/p>\n
The real magic comes from orchestration: co-ordinating all these moving parts. The trial used a network service orchestrator (NSO) to manage the PON controller, O-RAN intelligent controller, metro transport, and telemetry systems. Decisions were made automatically, based on live monitoring, creating a closed-loop system that adapts to demand within seconds.<\/p>\n
The L\u2019Aquila Trial: A glimpse into tomorrow\u2019s networks<\/p>\n
The trial in L\u2019Aquila wasn\u2019t an experiment run in a lab \u2013 it was conducted over a real urban multicore fibre ring, about 6km in length, connecting optical, wireless, and edge infrastructure (See next Fig. 1). Here\u2019s what it consisted of:<\/p>\n
Baseline setup: One radio unit (RU) and one PON port supported a VR user streaming content from a virtual museum app.
\nScaling up: When a second user joined, traffic monitoring detected the increase. Within seconds, a new RU\/DU was activated, an extra spatial lane was opened in the fibre, and an additional PON port was configured.
\nEnergy efficiency: Power consumption rose slightly \u2013 from 175W to 197W \u2013 but when traffic subsided, resources were automatically deactivated, returning to the baseline. This flexibility translated into an 11% energy saving compared to keeping everything running at full capacity all the time.
\nService continuity: Users experienced seamless VR streaming, with no drop in quality during network reconfiguration.<\/p>\n
The orchestration process, from traffic detection to reallocation of resources, took less than five seconds. That\u2019s faster than it takes to reload a webpage on a slow connection.<\/p>\n
Why energy efficiency matters<\/p>\n
At first glance, saving 22W might not sound like much. But scale matters. In dense urban environments, where thousands of small cells and optical nodes may be deployed, even modest savings per unit translate into substantial reductions in electricity consumption \u2014 and carbon emissions.<\/p>\n
Telecom networks already account for a significant share of global energy use. With 5G rolling out and 6G on the horizon, the challenge is clear: how do we deliver exponentially more data without exponentially more power consumption?<\/p>\n
The answer lies in intelligent, demand-driven resource management, as demonstrated in this trial. Instead of building oversized, always-on infrastructure, networks can become adaptive organisms, powering up when needed and powering down when idle.<\/p>\n
AR\/VR as a test case \u2013 and beyond<\/p>\n
AR and VR are perfect stress tests for next-generation networks. Their requirements are stricter than those of most current applications, pushing infrastructure to its limits. If a system can support seamless AR\/VR, it can handle just about anything else, for example:<\/p>\n
Smart cities with real-time sensor integration.
\nAutonomous vehicles requiring low-latency co-ordination.
\nTelemedicine with remote diagnostics and surgeries.
\nIndustrial automation where machines collaborate across networks.<\/p>\n
![\"\"](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2025\/10\/Demo_2_Fig_Arch-300x105.jpg\")
Fig. 1: Reference architecture and field trial setup. The L\u2019Aquila field trial integrated multicore fibre (MCF), spatial passive optical networks (PONs), and open radio access networks (O-RAN) with edge computing. This architecture allowed seamless scaling of resources for immersive AR\/VR services while improving energy efficiency<\/p>\n
Thus, while the L\u2019Aquila trial focused on immersive applications, its implications extend far wider. It shows that scalable, sustainable connectivity for future digital societies is within reach.<\/p>\n
Collaboration at the core<\/p>\n
The trial was the result of collaboration among universities, telecom operators, and technology providers across Europe, including CNIT, the University of L\u2019Aquila, UPC, Telefonica, TIM, FiberCop, WestAquila, and Accelleran. Funded under the EU SEASON project, it exemplifies the European approach to innovation: combining academic research, industrial expertise, and real-world deployment.<\/p>\n
Such partnerships are essential for tackling the complexity of modern networks. No single player \u2013 not even the largest telecom operator \u2013 can master all the moving parts alone. By pooling expertise, the project bridged photonics, radio access, edge computing, and orchestration into a unified solution.<\/p>\n
Looking toward 6G<\/p>\n
While 5G is still rolling out globally, research into 6G is already well underway. If 5G is about connecting everything, 6G will be about sensing, intelligence, and sustainability. Networks will not just transmit data but also gather context, adapt proactively, and integrate with satellite and non-terrestrial systems.<\/p>\n
The principles demonstrated in L\u2019Aquila \u2013 multicore fibres, spatial multiplexing, dynamic orchestration, and energy-aware design \u2013 are likely to play a pivotal role. They align perfectly with 6G\u2019s vision of green, adaptive, and human-centric networks.<\/p>\n
Conclusion: Toward sustainable immersion<\/p>\n
The field trial in L\u2019Aquila marks a milestone: the first real-world demonstration that immersive technologies like AR\/VR can be delivered seamlessly and sustainably through integrated optical-wireless-edge architectures. By dynamically scaling resources, the system achieved both high performance and meaningful energy savings.<\/p>\n
As immersive technologies move from niche to mainstream, and as global connectivity demands soar, such innovations will be indispensable. They show that the internet of the future can be not only faster and richer but also smarter and greener. In short: the networks powering our digital future won\u2019t just carry data \u2013 they\u2019ll carry services.<\/p>\n