The REASON project is one of the UK’s flagship research programmes that are driving the development of 6G communication systems. REASON brings together leading UK universities and industrial partners to create open, intelligent and sustainable network architectures that will form the foundation of future connectivity.  REASON addresses the growing demand for ultra-fast, energy-efficient and adaptive communication across multiple access technologies, i.e., spanning radio, optical fibre and optical wireless systems.

Objectives

REASON aims to establish a practical roadmap for open 6G architectures that combines advanced hardware innovation with intelligent software orchestration.  Its key goals include:

• Enabling seamless multi-access connectivity across cellular, Wi-Fi and LiFi systems
• Developing open-source frameworks for real-time network control and artificial intelligence (AI)-driven resource management
• Enhancing energy efficiency, scalability and reliability to support future use cases such as immersive digital environments, distributed digital twins, autonomous manufacturing and sustainable smart cities

Methodology

The project team integrates multidisciplinary expertise across semiconductors, radio frequency (RF) systems, optical fibre and optical wireless communications (OWC).

• Semiconductor research focuses on developing novel photonic and RF devices, such as vertical cavity surface emitting laser (VCSEL) arrays, silicon photonic amplifiers and gallium nitrate (GaN) power amplifiers, to deliver high bandwidth and low-energy operation
• RF and optical technologies are investigated to extend data throughput, reduce latency and enhance reliability using reconfigurable intelligent surfaces
• OWC experiments at the LRDC demonstrate multi-gigabit LiFi connectivity using customised VCSEL arrays, achieving aggregate data rates exceeding 300 Gbps
• mATRIC (multi-access technology real-time intelligent controller) serves as REASON’s central orchestration platform, using AI to manage diverse access technologies, dynamically allocate resources and enable intelligent, energy-aware networking

Together, these efforts are evaluated against key 6G performance indicators including ultra-high data rates, low latency, high reliability, scalability and energy efficiency.

Impact

REASON provides a unified platform for innovation in open-network design, directly supporting UK leadership in 6G research.  Project outcomes will include:

• Integration of RF, optical fibre and OWC into a coherent multi-access network
• Provision of a new AI-driven orchestration layer, i.e., mATRIC that underpins open and interoperable architectures aligned with global 6G standardisation
• Realisation of advanced photonic hardware prototypes and energy-efficient communication solutions ready for higher technology readiness level (TRL) validation

REASON will also contribute to the UK’s sovereign capability in next-generation communications and support national digital-infrastructure objectives.

Project partners: the Universities of Bristol, Southampton and Cambridge, King’s College London and Queen’s University Belfast, Digital Catapult, Parallel Wireless, Weaver Labs, BBC R&D, Thales and BT. Subcontractors: Nokia Bell Labs, Compound Semiconductor Centre, Ericsson, Real Wireless and Samsung

The REASON project is supported by the UK Government’s DSIT under the Future Open Networks Research Challenge.