Samsung and Nokia Demonstrate 6G Terahertz Wireless at 1 Tbps in Joint Lab Trial
Samsung Research and Nokia Bell Labs have jointly demonstrated a wireless data transfer rate of 1 terabit per second using terahertz (THz) frequency bands in a controlled laboratory environment. The achievement, announced at Mobile World Congress in Barcelona, represents the fastest wireless link ever demonstrated and sets a benchmark for the 6G networks expected to begin commercial deployment around 2030.
The Terahertz Frontier
Current 5G networks operate primarily in the sub-6 GHz and millimeter-wave (24-47 GHz) frequency ranges, delivering peak speeds of roughly 10 Gbps under ideal conditions. The terahertz band, spanning frequencies from 100 GHz to 10 THz, offers vastly more spectrum but comes with severe physical limitations: signals at these frequencies are absorbed by moisture in the air, blocked by solid objects, and attenuate rapidly over distance.
The Samsung-Nokia demonstration used a frequency band centered at 140 GHz, which sits at the lower edge of the terahertz range and offers a relative balance between bandwidth and propagation characteristics. The transmission covered a distance of 100 meters — far short of the kilometers that cellular signals must travel in real-world networks, but a significant improvement over previous THz demonstrations that were limited to benchtop distances of a few meters.
The research teams achieved the 1 Tbps throughput by combining several advanced techniques: massive MIMO antenna arrays with 256 elements, orbital angular momentum (OAM) multiplexing that encodes data onto multiple simultaneous beam spirals, and a custom silicon chip developed by Samsung Semiconductor that handles signal processing at terahertz speeds.
Why 6G Matters
The obvious question is whether anyone needs 1 Tbps wireless speeds. Current 5G networks already exceed the requirements of most consumer applications, including 4K video streaming, video calls, and cloud gaming. The answer lies in applications that do not yet exist at scale but are expected to emerge in the late 2020s and 2030s.
Holographic communication — the ability to transmit a real-time, full-body 3D representation of a person — is a frequently cited use case. Industry estimates suggest that a high-fidelity holographic stream would require sustained throughput of 500 Gbps to 1 Tbps, far beyond what 5G can deliver.
Digital twin environments, where entire physical spaces are continuously mapped and simulated in real time using sensor data, present similar bandwidth demands. Industrial applications including autonomous factory coordination, remote surgery with haptic feedback, and city-scale environmental monitoring are also on the list.
"We're not building 6G for today's applications," said Dr. Sunghyun Choi, head of Samsung's Advanced Communications Research Center. "We're building the network layer that makes the next generation of applications possible. Just as 4G enabled mobile video and ride-sharing apps that no one anticipated, 6G will enable experiences we can barely conceptualize today."
Standards Timeline
The 3GPP, the standards body that governs cellular network specifications, has begun preliminary work on 6G under its Release 21 framework. A formal 6G specification is not expected to be finalized before 2028, with initial commercial deployments targeted for 2030 in leading markets including South Korea, Japan, the United States, and parts of Europe.
Governments are investing heavily. The U.S. allocated $1.5 billion for 6G research through the CHIPS and Science Act. The European Union's Hexa-X-II research initiative involves 44 organizations across 18 countries. South Korea has committed $450 million through its national 6G development fund, with Samsung and SK Telecom as primary industry partners.
Challenges Ahead
The lab-to-field gap for terahertz technology is enormous. Reaching 100 meters in a controlled environment is very different from serving users inside buildings, in dense urban canyons, or across rural landscapes. Rain, humidity, and even the water vapor in a crowd of people can degrade THz signals significantly.
Most researchers expect that 6G networks will use terahertz frequencies selectively, deployed in specific high-density locations like stadiums, airports, and transit hubs, while relying on lower-frequency bands for broader coverage. The network architecture will likely be heterogeneous, blending satellite links, traditional cellular towers, and dense meshes of small THz access points.
Power consumption is another concern. The 256-element antenna arrays and high-speed signal processing chips required for THz transmission consume substantially more energy than current base station equipment. Reducing that power draw while maintaining performance is an active area of research.
Commercial 6G is still years away, but this week's demonstration in Barcelona shows that the foundational technology is progressing faster than many expected.
