6G news and analysis for the week ending Friday 19th September, 2025.
This was a week for the builders. While much of the 6G discourse remains focused on high-level vision and timelines, several of this week’s stories dug into the practical engineering challenges that will determine whether 6G delivers on its promises.
The most technically rich contribution came from the website Semiconductor Engineering, which published a detailed examination of the antenna and IC design challenges facing 6G. The picture is sobering: every device in the network, from handsets to base stations, will need fundamentally redesigned antenna systems to handle multi-band operation across frequencies ranging from existing LTE bands up to 7, 10 and 12 GHz and beyond. Custom silicon, GaN power amplifiers and beam-steering arrays are not optional extras; they are prerequisites.
Meanwhile, Samsung used the third instalment of its interview series to lay out its AI-RAN vision in detail. It positions AI not as an add-on optimisation layer but as the foundational operating principle of 6G radio networks, with its newly established AI-RAN Lab accelerating prototyping and testing.
The standards dimension was prominent too, with a strong opinion piece from Opensignal on the critical importance of NTN (non-terrestrial network) standardisation following the NTN Forum 2025. The message was clear: without common standards for terrestrial-satellite integration, spectrum harmonisation and handover consistency, the NTN promise risks fragmenting into incompatible silos.
Elsewhere, ETSI‘s Scott Cadzow outlined a vision for building 6G as an “Intelligent Trusted Network” with zero-trust security and quantum-resistant cryptography baked in from day one. And from India, a government-funded research grant for cell-free communication prototyping underlines the broadening global footprint of 6G R&D. We also cover a Japanese research breakthrough in room-temperature terahertz devices.
Key announcements this week
6G demands radical antenna and IC redesign
Semiconductor Engineering published a comprehensive feature examining the antenna, chip and edge compute challenges that 6G will impose across the entire network stack. Drawing on expert commentary from Ansys (now part of Synopsys), Fraunhofer IIS, Siemens EDA, Purdue University, Cadence, Infineon and others, the article maps out how the shift to higher frequency bands will require completely new antenna systems, custom silicon and mixed-architecture base station processors. Shawn Carpenter of Ansys noted: “It’s going to be a complete redesign of the antenna system.”
What’s new: The article details how 6G handsets may require up to 16 antennas for millimeter wave bands alone, while base stations will need beam-steering arrays with significantly more elements to deliver per-user “spotlight” beams. Techniques such as aperture tuning and antenna impedance matching will be essential for multi-band operation. Ron Squiers of Siemens EDA framed the scale of the challenge: “We’re talking about a terabit per second device instead of a 20 gigabit per second device.”
Why this matters: The article makes clear that 6G’s performance promises depend entirely on solving formidable hardware engineering problems. Cross-coupling between antennas in tight form factors, the need for GaN-on-SiC and GaN-on-Si power amplifiers to handle wider bandwidths at higher frequencies, and the requirement for bespoke silicon to process per-user beamforming in real time — these are not theoretical concerns but active design challenges. Purdue University president Mung Chiang characterised 6G’s impact as extending well beyond consumer electronics: “It’s going to be like electricity — the foundation of all modern technologies.”
Implications for 6G standards: The hardware capabilities described in the article will directly constrain what 3GPP can realistically specify for 6G. The availability of efficient, affordable RF components at upper mid-band and millimeter wave frequencies will influence the spectrum utilisation strategies now being studied in Release 20. The article also references several recent breakthroughs — including imec’s RF GaN-on-Si transistor and MIT’s photonic AI hardware accelerator — that could feed into the standardisation process.
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Samsung details AI-RAN vision for 6G
Samsung published the third instalment of its next-generation communications leadership interview series, featuring Charlie Zhang, Senior Vice President of the company’s 6G Research Team. The interview focuses on how AI-RAN (embedding AI directly into radio access network infrastructure) will transform network architecture from reactive to predictive and autonomous. Zhang described the shift: “Deeply embedding AI from the initial design stage to create autonomous and intelligent networks is exactly what we mean by ‘AI-Native.’”
What’s new: Samsung revealed it has established a dedicated AI-RAN Lab to accelerate prototyping and testing, aiming to shorten R&D cycles and speed commercialisation. At MWC 2025, the company demonstrated AI-RAN’s ability to improve resource utilisation in noisy, interference-prone environments. Zhang highlighted three specific AI applications: channel estimation that predicts dynamic channel characteristics, AI-driven signal processing for higher data throughput, and system automation that dynamically adjusts modulation and resource allocation based on real-time conditions.
Why this matters: Samsung is positioning AI-RAN as the bridge between current 5G vRAN deployments and 6G. The company’s approach of developing RAN hardware and AI-based software in parallel through integrated design reflects its status as both a chipset maker and network equipment vendor. Zhang’s emphasis on user experience over raw performance metrics aligns with the broader industry pivot captured in Samsung‘s own 3GPP 6G Workshop submission, which advocated for “sustainable user experience” rather than peak throughput. As a founding member and vice chair of the AI-RAN Alliance, Samsung is working to shape the ecosystem around its vision.
Implications for 6G standards: AI-RAN is increasingly positioned as foundational infrastructure for 6G rather than an enhancement. Samsung‘s work on AI-based channel estimation, signal processing and system automation aligns with the 3GPP Release 20 study items on AI/ML for RAN. The question is how quickly these capabilities can be translated from vendor-specific implementations into interoperable, standardised specifications.
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NTN standards critical for satellite-mobile integration
Opensignal analyst Fiona Armstrong-Mills published an in-depth opinion piece following NTN Forum 2025, where she moderated a panel on NTN integration in the 5G-Advanced and 6G landscape. The piece argues that without robust common standards, the promising early momentum behind non-terrestrial networks risks stalling. Nicolas Chuberre of ETSI was quoted: “This isn’t just about coverage extension. It’s also to achieve other goals, like improving the overall resilience of the network.”
What’s new: The article provides concrete data points on the state of NTN adoption: T-Mobile‘s US open beta attracted 1.8 million users, but this represents less than one per cent of the adult US population, underscoring how early the market is. Opensignal data shows that even in advanced mobile markets, users spend 0.5 to 1 per cent of their time with no signal — the persistent coverage gap that NTN aims to address. The article also highlights SpaceX‘s $17 billion deal to buy EchoStar‘s spectrum as a sign of intensifying commercial stakes.
Why this matters: The piece identifies three critical challenges for NTN maturation: consistent handover between terrestrial and satellite networks (a focus of 3GPP Release 19), spectrum harmonisation across geographies, and the need for standardised AI components to manage multi-satellite operations. Adnan Khan of Anritsu warned that inconsistent handover behaviour risks “fragmenting user experience, increasing costs, and slowing adoption.” Abhijeet Masal of CEWIT was equally direct: without a common standard, “we’ll end up with market fragmentation, high cost of deployment and ultimately a poor user experience.”
Implications for 6G standards: Multiple 3GPP workshop submissions have called for NTN to be integrated into 6G from day one, avoiding the late incorporation that hampered 5G NTN. The goal articulated at the forum — a “harmonized, single radio interface optimised for both terrestrial and non-terrestrial deployment scenarios” — aligns directly with submissions from Airbus, ESA, Thales and CSCN to the 3GPP 6G Workshop. The question of how spectrum will be shared between mobile operators and satellite manufacturers remains unresolved.
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ETSI outlines “intelligent trusted network” for 6G security
Scott Cadzow, Chair of ETSI‘s Technical Committee on Securing Artificial Intelligence, published a detailed article outlining how 6G should be built as an Intelligent Trusted Network (ITN). The ITN concept proposes a security overlay that integrates multiple access technologies under a unified, high-assurance framework using zero-trust principles and quantum-resistant cryptography.
What’s new: The ITN framework introduces four layers of defence: a minimum baseline security standard (MBSS) applied across all network functions, autonomous AI-driven security assurance for real-time threat detection, quantum-resistant encryption, and granular trust management with dynamic validation of every network interaction. Cadzow specifically highlighted the risk of AI model poisoning in 6G — where attackers could manipulate machine learning models used for traffic management to misallocate bandwidth during emergencies or prevent network self-healing.
Why this matters: This builds on the security foundations already being laid at 3GPP, where the SA3 working group began prioritising 6G security technologies at its August meeting in Gothenburg. Cadzow’s article goes further by addressing the architectural challenge of securing a network that spans terrestrial, satellite, drone and IoT domains with vastly different latency and bandwidth requirements. The ITN approach of applying tailored security controls — rather than a one-size-fits-all model — acknowledges that a temperature sensor and a banking application require fundamentally different protections. The alignment with the EU Cyber Resilience Act and the UK’s Telecommunications Security Act provides regulatory momentum.
Implications for 6G standards: The secure-by-design approach is consistent with the direction already emerging from 3GPP SA3 and broader industry consensus. The specific proposal to limit AI model queries as a countermeasure against exploitation is a practical consideration that could influence how AI components are specified within 6G standards.
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du outlines 6G and AI strategy for the UAE
UAE operator du has outlined its technology strategy, which includes active participation in 6G research alongside AI-powered services and hyperscale data centre investment. Jasim Al Awadi, Chief ICT Officer, spoke at the company’s Envision 2025 event in Dubai, describing plans to lead in 6G development while building a Dh2 billion ($545 million) hyperscale data centre in collaboration with Microsoft.
What’s new: du confirmed it has achieved 99 per cent 5G coverage in the UAE and is “actively participating in cutting-edge 6G research.” The company is also rolling out 5G-Advanced technology and has launched a sovereign-grade cloud platform in partnership with Oracle. Al Awadi framed the broader UAE ICT market as growing from $52.23 billion in 2025 to $85.24 billion by 2030.
Why this matters: While the announcement is light on 6G technical specifics, it signals that Middle Eastern operators are positioning for the next generation alongside their European, Asian and North American counterparts. The emphasis on sovereign cloud, data residency and AI infrastructure reflects the foundational investment that will underpin 6G services. The UAE’s alignment with national digital transformation strategies — including the Dubai Universal Blueprint for Artificial Intelligence — provides a policy framework that many other markets are still developing.
Implications for 6G standards: du‘s involvement in 6G research, while not yet detailed, adds to the broadening global participation in 6G preparation. As 3GPP members, UAE-based operators can contribute to the standards process and ensure that regional requirements — particularly around data sovereignty and network security — are reflected in specifications.
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India funds cell-free 6G communication research
The International Institute of Information Technology, Naya Raipur (IIIT-NR) has secured a research grant from India’s Department of Science and Technology (DST) for a project titled “Implementation and Prototype Design for Ubiquitous Connectivity Using Cell-Free Communication in 6G Environment.” The project, led by the institute’s Intelligent Sensing and Advanced Communication (ISAC) lab, aims to develop and prototype a cell-free communication system that uses distributed access points rather than traditional cell-based architecture.
What’s new: The project will design a working prototype demonstrating cell-free communication, which promises consistent, high-speed connectivity across both urban and rural areas. An unnamed wireless communication startup is the industry partner. IIIT-NR Director Prof Om Prakash Vyas said the project supports India’s ‘Bharat6G’ vision for “technological self-reliance and global competitiveness in the 6G domain.”
Why this matters: Cell-free massive MIMO is one of the candidate technologies being studied for 6G radio access, with the potential to eliminate the cell-edge performance degradation that plagues traditional cellular architectures. India’s government investment in 6G prototyping — through its DST Technology Translation scheme — is part of the broader Bharat6G initiative to ensure India has a seat at the 6G standards table. With 3GPP holding record-attendance meetings in Bengaluru earlier this year, India’s 6G ambitions are increasingly backed by research funding.
Implications for 6G standards: Cell-free architectures are being discussed as part of the broader 6G radio innovation landscape, though they face significant practical challenges around fronthaul capacity and coordination complexity. Indian-developed prototypes could provide valuable data for 3GPP study items, particularly around deployment feasibility in diverse urban and rural environments.
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Selected research papers published this week
Room-temperature terahertz diode breakthrough
Researchers at Nagoya University in Japan have achieved a world first: a resonant tunnelling diode (RTD) that operates at room temperature using only non-toxic Group IV semiconductor materials (germanium-tin and germanium-silicon-tin alloys). Previously, such devices made from Group IV materials only functioned at extremely low temperatures (around -263°C). The breakthrough was achieved by introducing hydrogen gas during the layer formation process, which prevented mixing between the ultra-thin semiconductor layers and reduced current leakage. The research was published in ACS Applied Electronic Materials.
Why this matters: RTDs are critical components for terahertz wireless communication — the frequency range that could enable the ultra-high-speed data transfer envisioned for 6G. Current RTDs rely on Group III-V materials containing toxic and rare elements such as indium and arsenic. A room-temperature device using only safe, abundant Group IV materials opens the door to more sustainable and scalable manufacturing. While practical terahertz communication devices remain some distance from commercial deployment, this addresses one of the fundamental material science barriers.