June 5, 2026 · 7 min read · Technical Whitepapers
Release 18 brings sub-meter RedCap positioning, Ka-band NTN satellite IoT, and centimeter-range indoor accuracy. Release 19 adds decimeter-level V2X positioning, AI-driven multi-source positioning fusion, and RedCap+NTN hybrid connectivity. If your IoT procurement timeline extends past 2027, these releases define what your devices will connect to — and what they won't.
3GPP Release 18 — the first release of 5G-Advanced — was functionally frozen in 2024. Commercial deployments began in late 2025 and will scale through 2026. Release 19 was frozen in late 2025 and serves as the bridge to 6G. Together, they define the cellular IoT capabilities that will be available when devices being procured today enter the field in 2027-2028. If your procurement timeline extends past 2027, these are not future features. They are the specification baseline your devices will connect to.
Release 17 introduced RedCap (NR-Light) as the mid-tier IoT option. Release 18 — "RedCap 2.0" or eRedCap — further reduced complexity: 3 MHz channel support (down from 5 MHz in Rel-17), improved power efficiency for battery-powered sensors, and positioning accuracy improved from approximately 10 meters to sub-1-meter via frequency-hopping PRS (Positioning Reference Signals) and SRS (Sounding Reference Signals).
Release 19 continues this trajectory: richer RedCap feature subsets, coexistence improvements with existing LTE-M/NB-IoT deployments, and RedCap+NTN hybrid connectivity — a terrestrial RedCap device with satellite fallback for logistics and remote monitoring. For the first time, a single device class can operate on both terrestrial cellular and NTN satellite without hardware changes.
Source: e-lins.com, "The Road Ahead: RedCap's Evolution", 2025. Available at https://e-lins.com/Blog/the-road-ahead-redcaps-evolution/
Release 17 introduced NTN (Non-Terrestrial Network) support for L-band and S-band — sufficient for narrowband IoT messaging via satellite. Release 18 adds Ka-band (17-31 GHz) with ±50 kHz Doppler tolerance and 1000 ms propagation delay handling — enabling broader bandwidth satellite IoT services over LEO and MEO constellations. This is the specification that makes Iridium's NTN NB-IoT service (launching 2026) and Starlink's Direct-to-Cell architecture technically viable within the 3GPP framework.
Release 19 further integrates low-orbit satellites and high-altitude platforms into 5G positioning frameworks. Hybrid GNSS-5G positioning enables a device to use both satellite navigation and 5G NR signals simultaneously for positioning — critical for logistics tracking where GNSS alone is unreliable (urban canyons, container stacks, aircraft hangars).
Source: TeckNexus, "3GPP Issue 11: Release 18-19 Highlights and Early 6G", 2026. Available at https://tecknexus.com/3gpp-issue-11-release-18-19-highlights-and-early-6g/
The positioning accuracy trajectory across releases: Rel-17: approximately 5 meters indoor. Rel-18: sub-10 centimeters indoor via AI/ML-assisted positioning and multi-source fusion (GNSS + 5G NR + UWB). Rel-19: decimeter-level for V2X (autonomous driving, lane-level navigation), sub-meter for industrial IoT in multipath-rich indoor environments via enhanced ToA (Time of Arrival) and AoA (Angle of Arrival). Update rates: 10 Hz or more at highway speeds.
Release 18 also standardizes sidelink positioning — direct device-to-device positioning signaling without network involvement. This matters for V2X (vehicle-to-everything), public safety, and industrial IoT where devices need relative positioning without cellular network coverage. Release 19 enhances this with RTK (Real-Time Kinematic) integration.
Source: SS8, "Location Intelligence Evolution with 3GPP Release 19", 2025. Available at https://www.ss8.com/location-intelligence-evolution-3gpp-rel-19/
Release 19 provides the first standardization steps for AI-based positioning: method selection (the network selects the best positioning technique based on environment), multi-source fusion (GNSS + 5G + WiFi + Bluetooth + inertial sensors), and RF fingerprinting (the network learns the RF signature of a location and uses it for positioning without requiring direct LOS to satellites or towers). These are foundational for automated warehouses, autonomous port equipment, and drone logistics — environments where GPS is unreliable and multiple positioning sources must be fused in real time.
Source: TechTarget, "5G-Advanced features: Pervasive AI, broader reach, precision", 2025. Available at https://www.techtarget.com/searchnetworking/tip/5G-Advanced-features-include-accurate-timing-AI-support
Devices being specified today — mid-2026 — will enter production in 2027 and deploy through 2030. Release 18 features will be standard by 2027. Release 19 features will be standard by 2028-2029. Specifying a module that supports only Release 17 today means the device will be two specification generations behind before the end of its deployment lifecycle. Key procurement questions: does the module support Rel-18 RedCap positioning? Does it support Rel-19 NTN for satellite fallback? Can it be upgraded to support Rel-19 AI positioning via firmware, or does it require a hardware change? If the answer to the last question is "hardware change," the device has a planned obsolescence date before the end of its expected field life.