What 6G actually is, the spectrum it will use, the architecture that powers it, and the 3GPP road to 2030 — grounded in ITU-R M.2160 and real 3GPP specifications, not hype. The deepest free 6G resource on the web, built by working telecom engineers.
6G is the sixth generation of mobile networks — standardised internationally by the ITU as IMT-2030 and specified by 3GPP from Release 20 onwards. It builds directly on the 5G core and 5G-Advanced (Releases 18–19), adding sub-terahertz spectrum, an AI-native design, and the ability for the network to sense the physical world, with first commercial deployments targeted around 2030.
Where 5G was defined by the ITU's IMT-2020 vision, 6G is governed by Recommendation ITU-R M.2160, published in November 2023. That document sets the vision, the fifteen target capabilities, and the six usage scenarios that 3GPP's 6G radio and core must satisfy. In other words: the ITU says what 6G must achieve; 3GPP designs how.
If you are new to the topic, start with our plain-English explainer “What Is 6G? The 3GPP Release 20 Study and the Road to 2030”, then follow the road map of mobile generations in “4G → 5G → 6G: The Complete 3GPP Evolution.”
The honest answer: most 6G performance figures are illustrative research targets in ITU-R M.2160, not fixed requirements yet. The table below uses ITU's example values and clearly flags them as targets. The bigger story is architectural — three brand-new usage scenarios and two new spectrum ranges.
| Dimension | 5G (IMT-2020) | 6G (IMT-2030 — targets) |
|---|---|---|
| Standard body | ITU IMT-2020 · 3GPP Rel-15+ | ITU IMT-2030 · 3GPP Rel-20/21 |
| First specs / launch | 2018 (Rel-15) · 2019 live | ~2028 (Rel-21) · ~2030 live |
| Peak data rate | 20 Gbit/s | ~200 Gbit/s (aspirational up to ~1 Tbit/s) |
| User-experienced rate | 100 Mbit/s | 300–500 Mbit/s |
| Over-the-air latency | 1 ms | ~0.1 ms |
| Spectrum | sub-6 GHz + mmWave 24–52 GHz | + FR3 7–24 GHz + sub-THz 100–300 GHz |
| Connection density | 10⁶ /km² | up to 10⁷–10⁸ /km² |
| Positioning | sub-metre | centimetre-level |
| Core paradigm | Service-Based Architecture | AI-native, sensing-integrated SBA |
| New scenarios | eMBB · URLLC · mMTC | + ISAC · Integrated AI · Ubiquitous Connectivity |
Full breakdown with every 3GPP spec reference: 6G — The Complete Technical Guide.
6G arrives through 3GPP's release train, anchored to the ITU's IMT-2030 schedule:
| Phase | What happens | Approx. timing |
|---|---|---|
| Rel-18 / 19 | 5G-Advanced — AI/ML for the air interface, NTN, RedCap, ISAC study. The technical foundation 6G inherits. | 2024–2026 |
| Rel-20 | First 6G study items — requirements, scenarios and architecture studies begin. | study from 2025 |
| Rel-21 | First normative 6G specifications (stage 3 / protocol). | ~2028 |
| ITU IMT-2030 | Technical performance requirements, evaluation, and the IMT-2030 radio interface recommendations. | ~2027–2030 |
| Commercial 6G | First live networks, aligned with IMT-2030. | ~2030 |
Deep-dive: 6G Standardisation Timeline — 3GPP Release 19, 20, 21 and ITU IMT-2030.
ITU-R M.2160 defines six usage scenarios. Three extend the familiar 5G triangle (eMBB, URLLC, mMTC); three are entirely new to 6G.
Extends eMBB — XR, holographic and multi-sensory media at extreme data rates.
Extends mMTC — vast numbers of low-power sensors and ambient-IoT devices.
Extends URLLC — even tighter latency and reliability for industrial and safety control.
The network is a distributed compute fabric — AI inference and training run inside it.
The same radio senses the world — position, velocity, presence and imaging (ISAC).
Seamless terrestrial + non-terrestrial (satellite) coverage everywhere.
Full explainer with the four overarching design aspects (sustainability, security, resilience, inclusion): 6G Use Cases and the ITU IMT-2030 Framework.
6G keeps existing low and mid bands for coverage and adds two new ranges — the headline being the FR3 upper mid-band:
| Range | Frequencies | Role in 6G |
|---|---|---|
| Low / FR1 | < 7 GHz | Wide-area coverage, NTN, mMTC — refarmed from 4G/5G. |
| FR3 (upper mid-band) | ~7–24 GHz | The headline 6G capacity band — balances coverage and bandwidth; studied under WRC-27. |
| mmWave / FR2 | 24–71 GHz | Carried over from 5G for hotspots and fixed wireless. |
| Sub-THz | ~100–300 GHz | Extreme bandwidth for short range, fixed links, and high-resolution ISAC. |
Why 7–24 GHz is the "golden band" and how sub-THz propagation behaves: 6G Spectrum — FR3 Upper Mid-Band and Sub-THz Explained · propagation maths in Radio Propagation Models: 5G NR to 6G Sub-THz.
These are the building blocks the 6G standards are being designed around. Each links to a full engineer-grade deep-dive.
ML for CSI feedback, beam management and positioning — designed in, not bolted on.
Read →One waveform that carries data and senses the environment (ISAC / JCAS).
Read →Programmable metasurfaces that bend and focus radio beams.
Read →Abandon the cell — many cooperating access points serve the user jointly.
Read →Satellite-native 6G — LEO/MEO/GEO as first-class access.
Read →The 24 key issues of 3GPP TR 23.801 — the next-gen core.
Read →6G evolves the 5G Service-Based Architecture into something AI-native and cloud-native by design: the core embeds analytics and inference (the successor to 5G's NWDAF), sensing becomes a first-class function, and the RAN–core boundary blurs as compute moves to the edge. 3GPP's architecture study lives in TR 23.801.
Two complementary reads: 6G Network Architecture: Beyond the 5G Core (the conceptual shift) and 6G Core Network Architecture — The Complete Guide (every key issue, spec-by-spec). Prefer to see it run? Open the AI-Native 6G Core lab or the live 6G Workbench.
The most complete free 6G library on the web — deep-dive articles, hands-on browser labs, and structured courses, all built by working telecom engineers and grounded in 3GPP specifications.
Touchable immersive 6G city.
Open lab →Live core + sim, all-in-one.
Open lab →Architecture design lab.
Open lab →Interactive ITU framework.
Open lab →Research-grade PHY/BER sim.
Open lab →Sub-THz, beamforming, ISAC.
Open lab →The whole 6G lab collection.
Open lab →Browser labs, cinematic courses, and deep-dive books — built by field engineers, grounded in 3GPP. Lifetime access from $14.99.