3GPP Release 20 Just Hit a Major Milestone: What It Means for 5G-Advanced and the Road to 6G

3GPP Release 20 just cleared one of its most important checkpoints. At the 3GPP Plenary #113 meetings comprising TSG RAN, TSG SA, and TSG CT held in Madrid, Spain from September 15 to 17, 2026, the standards body confirmed that Stage 2 (System Architecture) for Release 20 has hit 100% completion. At the same time, TSG SA formally approved TR 22.870, “6G Use Cases and Service Requirements.” This is the Stage 1 document that will anchor normative 6G work in Release 21. Two milestones, one meeting: 5G-Advanced keeps maturing while 6G’s foundations get poured underneath it.

Why Release 20 Exists and Why It’s Split in Two

Release 20 occupies an unusual position in 3GPP’s roadmap. It’s simultaneously the sixth release of 5G, the third release of 5G-Advanced, and the study phase for 6G. 3GPP concluded early on that two full releases would be needed to properly specify 6G. Release 20 will be for foundational studies. Release 21 will be for the actual normative specification work. That’s why Release 20’s Stage 1 (service requirements) froze back in June 2025. Stage 2 followed a staged timeline: 80% completion by June 2026 and now the full freeze confirmed at this September meeting.

Working group chairs described this as a deliberate dual-track strategy. They are pushing 5G-Advanced feature work aggressively while accelerating 6G studies in parallel. In other words, they do not wait for one to finish before starting the other.

What TR 22.870 Actually Locks In

TR 22.870 is more than a scoping document. Instead, it’s the Stage 1 service-requirements anchor that Release 21’s normative 6G specification work will build directly on top of. It identifies the use case categories 3GPP expects the 6G system to support. These include AI-native network operation, Integrated Sensing and Communications (ISAC), ubiquitous connectivity, immersive communication, massive communication, and dedicated support for industrial and vertical-sector use cases.

Approving this document doesn’t freeze 6G’s technical design. That’s still years away. What it does is lock in the requirements 6G’s architecture will be judged against. As a result, vendors and operators get a stable target to plan toward well before any radio interface specification exists.

Release 20 and 6G Timeline at a Glance

Beyond the Headlines: What Else Moved at Plenary #113

Two other developments from this meeting cycle are worth flagging for anyone planning around Release 20. First, a follow-on work item on transitioning 3GPP systems to Post-Quantum Cryptography was approved a forward-looking security step that ensures future 3GPP systems can adopt quantum-safe cryptographic algorithms as they mature, well ahead of when quantum computing might threaten current encryption standards. Second, discussions continued around interworking between 5G and non-3GPP systems, including an open question about whether Release 20 needs to formally support interworking with 4G a reminder that even as the industry looks toward 6G, backward compatibility with legacy infrastructure remains an active engineering concern.

What This Means for the Industry

5G-Advanced isn’t slowing down to make room for 6G. With Release 20’s Stage 2 fully frozen, vendors and operators now have a stable system architecture to build against for the remaining 5G-Advanced feature set, even as 6G study work accelerates in parallel working groups.

6G’s use cases are now formally defined, even if the technology isn’t. TR 22.870’s approval means the industry has a documented, standards-body-endorsed answer to “what should 6G actually do.” AI-native operation, ISAC, immersive and massive communication are included well before Release 21 starts specifying how any of it works technically.

The runway to 6G is longer than headlines suggest, and that’s by design. With formal candidate technology submission to the ITU-R not expected until late 2028 or early 2029, and Release 21’s own Stage 3 freeze not due until December 2028, this September 2026 milestone represents early-stage foundation work. It does not mean an imminent 6G launch.

Frequently Asked Questions

What is 3GPP Release 20? Release 20 is simultaneously the sixth release of 5G, the third release of 5G-Advanced, and the dedicated study phase for 6G. This follows 3GPP’s decision to split 6G specification across two releases. Release 20 is for studies, while Release 21 is for normative work.

What milestone did Release 20 just reach? At the September 2026 Plenary #113 meetings in Madrid, Release 20’s Stage 2 (System Architecture) reached 100% completion. TR 22.870, the Stage 1 anchor document for 6G use cases and service requirements, was also formally approved.

When will 6G actually be specified? Normative 6G specification work begins in Release 21, with a formal candidate technology submission to the ITU-R targeted for late 2028 or early 2029 meaning genuine 6G standards remain several years away.

Does Release 20 include anything beyond 6G studies? Yes. It also includes 5G-Advanced normative feature work. Additionally, this meeting cycle approved a follow-on work item on transitioning 3GPP systems to Post-Quantum Cryptography.

Going Deeper

Understanding how 3GPP’s release cycle connects 5G-Advanced maturity to the foundations of 6G is exactly the kind of forward-looking knowledge covered in our 5G training catalog, including how architecture decisions made today shape what operators can deploy years from now.

Sources: 3GPP Plenary #113 meeting reports (Madrid, September 2026), EverythingRF, IEEE ComSoc Techblog, 3GPP.org Release 20 page, ATIS Rel-20 webinar insights, FirstNet Authority. This article is part of our ongoing coverage of 3GPP standards evolution toward 6G.