5G NTN-18

5G New Radio Non-Terrestrial Network Release 18 Protocol Stack Enhancements

STATUS | Completed
STATUS DATE | 06/07/2025
ACTIVITY CODE | 3F.011
5G NTN-18

Objectives

The 5G NTN-18 project aims to provide a full 5G non-terrestrial network (NTN)  New Radio (NR) Release 18 protocol stack that will be tested in real time channel emulators for certain NTN application scenarios such as Frequency Range 1 (FR1) and Frequency Range 2 (FR2) bands, beamforming, bandwidth and numerology configurations. The protocol stack will also integrate some Release 19 features demonstrating the regenerative type of 5G NTN communication systems.

Challenges

The 5G NTN-18 project will address multiple challenges related to NTN-NTN and terrestrial networks (TN)-NTN mobility handovers, radio coverage enhancements and high numerology and bandwidth transmission. Another key challenge is to demonstrate the protocol stack platform using real time simulator over Software-Defined Radio (SDR) devices for both FR1 and FR2 bands.

System Architecture

The system architecture consists of the following elements:

  • gNb compliant with Release 18 features
  • UE compliant with Release 18 features
  • Channel emulator for FR1 and FR2 bands over geostationary orbit (GEO) / low Earth orbit (LEO) and very low Earth orbit (VLEO) satellites.

Plan

The project plan is summarised as follows:

  • Finalised Technical Specification
  • Selected Technical Baseline
  • Verified Detailed Design
  • Implementation and Verification Plan
  • Verified Deliverable Items and Compliance Statement

Current Status

The technical specification has been finalised.