By Dr. Jacob Sharony, Mobius Consulting — June 2026
5G has reached an inflection point. The original 5G specifications (3GPP Releases 15–17) are mature and broadly deployed; the 5G-Advanced era (Releases 18–19) is now the technology shipping into networks; and with Release 19 frozen, 3GPP’s Release 20 has opened the first formal 6G study items. On the ITU side, the IMT-2030 (6G) framework is set and its technical performance requirements were agreed in February 2026. This article summarizes where each generation stands and what the transition means for engineers — and for patent litigation.
5G: Releases 15–17
- Release 15 (2018) — the foundation: 5G NR with flexible OFDM numerology (15–120 kHz subcarrier spacing), sub-7 GHz (FR1) and mmWave (FR2) operation, massive MIMO and beam management, LDPC data coding and polar control coding, and both non-standalone (NSA, LTE-anchored) and standalone (SA) architectures.
- Release 16 (2020) — "5G for industry": URLLC enhancements and industrial IoT, NR-V2X sidelink, NR in unlicensed spectrum (NR-U), integrated access and backhaul (IAB), 2-step RACH, and NR positioning.
- Release 17 (2022) — coverage and reach: RedCap (reduced-capability devices for wearables/sensors), non-terrestrial networks (NTN — NR over satellites), extension to 52.6–71 GHz, multicast/broadcast, and improved positioning.
5G-Advanced: Releases 18–19
Release 18 (frozen 2024) began the officially branded 5G-Advanced track, and Release 19 — now frozen, with working groups fully shifted to Release 20 — completes its second wave. Highlights:
- AI/ML in the air interface — a standardized framework for machine-learning-assisted CSI feedback, beam management, and positioning
- XR (extended reality) support — traffic-aware scheduling and power savings for AR/VR-class latency and capacity
- Network energy savings — cell sleep modes and signaling reductions targeting operator sustainability goals
- Evolved MIMO, mobility (L1/L2-triggered), RedCap evolution, and NTN enhancements
- New service studies — ambient IoT (battery-free, energy-harvesting tags) and integrated sensing and communication (ISAC), both of which preview 6G directions
5G vs. 5G-Advanced vs. 6G at a Glance
| 5G | 5G-Advanced | 6G (IMT-2030) | |
|---|---|---|---|
| 3GPP releases | Rel-15–17 (2018–2022) | Rel-18–19 (2024–2026) + Rel-20 evolution | Rel-20 studies (2025–2027); Rel-21 first specs (~2028) |
| Status (June 2026) | Deployed worldwide | Shipping; Rel-19 frozen | Requirements agreed (ITU-R, Feb 2026); studies under way |
| Signature capabilities | eMBB, URLLC, mMTC; mmWave; network slicing | AI/ML air interface, XR, RedCap, NTN, energy savings | AI-native design, ISAC, ubiquitous (incl. satellite) coverage, immersive communication |
| Spectrum focus | Sub-7 GHz + 24–52 GHz | + 52.6–71 GHz, NTN bands | New mid-band (7–15 GHz range) under study for WRC-27; sub-THz research |
| Commercial systems | 2019– | 2024– | ~2030 |
The Road to 6G
6G standardization is now formally under way on two coordinated tracks. At the ITU, the IMT-2030 framework (Recommendation M.2160) defines six usage scenarios — immersive communication, hyper-reliable low-latency communication, massive communication, ubiquitous connectivity, AI-and-communication, and integrated sensing and communication — and ITU-R WP 5D agreed the IMT-2030 technical performance requirements in February 2026, with formal approval expected at the end of 2026. At 3GPP, Release 20 contains the first 6G study items on scenarios and requirements, radio evolution, system architecture, and security; the first normative 6G specifications are planned for Release 21, expected around 2028, supporting commercial 6G systems around 2030. New mid-band spectrum in the 7–15 GHz range is under study ahead of WRC-27, and candidate technologies include AI-native air-interface design, ISAC, tighter terrestrial–satellite integration, and extreme MIMO.
A Litigation Perspective
Cellular standards are the most patent-dense technology space in litigation, and each release wave reshapes it:
- SEP scale. Tens of thousands of patent families are declared essential to 5G at ETSI. Whether a given patent is actually essential — and whether an accused product implements the relevant mandatory or optional feature — is a technical question at the center of most cellular disputes.
- New features become new battlegrounds. Assertion activity follows deployment: scheduling, HARQ, and beam management dominated early 5G cases; RedCap, NTN, positioning, and XR-related features are the emerging wave, and ambient IoT and ISAC will follow.
- The standards record is evidence — both ways. 3GPP TDoc contributions, study and work item histories, and freeze dates establish what was in the art and when. They serve as prior art in IPR proceedings and as the map for essentiality and infringement analysis.
- 6G’s record is being written now. The contributions filed in Release 20/21 will determine the SEP landscape of the 2030s — the provenance questions litigated then are being created today.
Dr. Jacob Sharony has served as an expert in numerous cellular patent matters — district court, PTAB, and arbitration — involving 5G and LTE technologies. See 5G Patent Litigation Expert Witness, LTE / 4G Patent Expert Witness, SEP / FRAND Standards Expert Witness, IPR / PTAB Expert Witness, and previous testimony and engagements, or contact Mobius Consulting.