A New Frontier: 6G & AI-Native Networks

Even as the telecommunications sector diligently progresses with the deployment and refinement of 5G networks, a significant global effort is underway to define the next generation of mobile technology: 6G. With initial commercialisation anticipated around 2030, momentum is building rapidly in 6G research and development worldwide.

A foundational and unifying principle emerging from these early activities is the development of "AI-native" networks – architectures where artificial intelligence intrinsically weaves into the network's very fabric and operation from its inception.

The year 2025 is widely recognised across the industry as a crucial starting point for the formal processes of establishing 6G standards.

Collaborative innovation: driving 6G advancement

Strategic alliances across the telecommunications ecosystem are proving vital in shaping the trajectory of 6G. A recent announcement from NVIDIA highlighted this collaborative spirit, detailing significant partnerships with key industry players including T-Mobile, MITRE, Cisco, ODC and Booz Allen Hamilton.

The joint undertaking focuses on researching and developing AI-native wireless hardware, software and system architecture specifically for 6G, leveraging NVIDIA's advanced AI Aerial platform.

The initiative builds upon the existing AI-RAN Innovation Center collaboration between T-Mobile and NVIDIA, extending its focus towards fundamental 6G concepts.

Government and defence: exploring 6G's strategic potential

The transformative potential of 6G capabilities has garnered considerable attention from governmental and defence sectors.

The US Department of Defense (DOD), through its FutureG Office, has strategically shifted its primary research and development focus towards 6G technologies.

The DOD is actively exploring advanced capabilities potentially unlocked by 6G, such as Integrated Sensing and Communication (ISAC), which could enable groundbreaking applications like enhanced drone detection utilising the wireless network itself.

The initiatives are being pursued within the Open Radio Access Network (Open RAN) principles framework to ensure modularity and interoperability.

Regional initiatives: global powers invest in 6G leadership

Major economic regions are making substantial investments in 6G research to secure technological leadership. In Europe, the Smart Networks and Services Joint Undertaking (SNS JU) launched the SNS CO-OP project in early 2025.

The significant initiative aims to coordinate and support the extensive ecosystem of 79 European 6G research projects funded under the SNS JU, aiming to maximise innovation impact and strengthen Europe's influence on the development of global 6G standards.

As the SNS JU highlighted, this project aims to "coordinate and support the ecosystem of 79 European 6G research projects funded under the SNS JU, maximising innovation impact and strengthening Europe's influence on global 6G standards development."

In Asia, the April 2025 Global 6G Conference in Nanjing, China, served as a pivotal platform for international collaboration.

The conference brought together leading experts from Chinese academia, major operators including China Telecom, China Unicom and China Mobile and prominent research institutions such as Purple Mountain Laboratories.

Discussions centred on critical aspects of 6G, including standards, network architecture, key technologies and potential application scenarios.

Standardisation commences: defining the 6G framework

The year 2025 marks a crucial inflexion point as the industry transitions from exploratory research towards the formalisation of standards.

Initial discussions are underway within key global standards bodies such as the 3rd Generation Partnership Project (3GPP) and the International Telecommunication Union (ITU) to establish the fundamental requirements and technical specifications for 6G.

Technological pillars: shaping the 6G landscape

The AI-native network concept forms the core of the 6G vision.

In contrast to 5G, where the implementation of AI is an overlay for network optimisation, 6G aims to deeply embed AI and Machine Learning (ML) capabilities across all network layers – the Radio Access Network (RAN), the core network and network management systems.

The integration is expected to actively enable dynamic resource allocation, optimise the network predictively based on real-time conditions, strengthen security protocols and drive unprecedented automation. 

The concept of AI-RAN, involving the co-location of AI processing capabilities with RAN functions, is considered a vital stepping stone towards achieving fully AI-native 6G networks.

A key anticipated advantage of this intrinsic AI integration is a significant enhancement in spectral efficiency, allowing for more data transmission within a given spectrum allocation.

The industry's strong push towards AI-native architectures appears to be a strategic response to some of the operational complexities and monetisation challenges encountered with 5G. By building intelligence directly into the network fabric from the outset, the industry aims to create a more adaptable, efficient and ultimately more profitable platform capable of supporting innovative applications and services.

Architectural evolution: 6G research anticipates fundamental shifts in network architecture. A significant trend under investigation is the potential move from the traditional base-station-centric model towards a more user-centric approach. Concepts such as cell-free massive Multiple-Input Multiple-Output (MIMO), where numerous distributed access points collaboratively serve users without the constraints of defined cell boundaries, are being actively explored. 

You Xiaohu of iSoftStone Information Technology Group has proposed an innovative cell-free space-time 2D coding architecture to support the decentralisation and multi-point collaboration trend.

Further demonstrating the focus, the FuTURE Mobile Communication Forum has established a dedicated Cell-Free Working Group, indicating concentrated research efforts in this area.

Integrated Sensing and Communication (ISAC): A potentially transformative capability being researched for 6G is directly integrating sensing functionalities within the communication network infrastructure.

By analysing radio wave propagation characteristics, 6G networks could perform tasks such as high-precision positioning, environmental mapping, gesture recognition and object detection (for example, identifying and tracking drones), effectively transforming the network into a distributed sensor array. The US DOD's keen interest illustrates ISAC's significant potential defence applications.

New spectrum frontiers: While the efficient utilisation of existing spectrum bands below 7 GHz and in the millimetre-wave ranges (24-71 GHz) remains crucial, 6G research is actively exploring the use of new, higher frequency bands to achieve significantly wider bandwidths and consequently higher data rates.

Key areas of investigation include the spectrum between 7 GHz and 24 GHz (often referred to as FR3 or upper mid-band) and the sub-Terahertz (sub-THz) range, typically spanning from 90 GHz up to 300 GHz. The recent launch of a New Mid-Band (FR3) Working Group highlights the industry's focus on this intermediate frequency range.

Emerging technologies: Research extends to a range of other enabling technologies. Reconfigurable Intelligent Surfaces (RIS) – passive or semi-passive surfaces capable of intelligently reflecting radio signals – are being investigated to enhance signal propagation and coverage, particularly in indoor or complex environments. The evolution of Open RAN principles, incorporating greater AI-driven flexibility, is expected to continue into the 6G era.

Furthermore, tighter integration between terrestrial and non-terrestrial networks (NTNs), including satellite constellations, is anticipated.

Demonstrating the synergistic potential of multiple advanced concepts, Purple Mountain Laboratories unveiled a 6G field test network integrating communication, intelligence and sensing capabilities, reportedly achieving connectivity gains of 10 to 100 times compared to 5G.

Purple Mountain Laboratories reported that its test network achieved "connectivity gains of 10 to 100 times compared to 5G."

The concurrent and substantial investment in 6G research programmes by major global powers, including the US, Europe and China, signifies more than pursuing technological advancement.

The explicit objectives of achieving leadership and influencing global standards, coupled with military interest in specific 6G capabilities, strongly suggest that developing 6G is deeply intertwined with geopolitical competition.

Nations are actively vying not only for technological supremacy and the associated economic advantages but for strategic influence in shaping the future of global communications infrastructure.

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