Understanding 5G NTN technology and testing aspects
www.rohde-schwarz.com
Nov. 3, 2026, 12:49 p.m.
5G non-terrestrial networks (5G NTN or NR-NTN) represent a fundamental evolution in mobile connectivity, leveraging satellites across low Earth (LEO), medium Earth (MEO), and geostationary (GEO) orbits, alongside high-altitude platforms (HAPS), to extend coverage to oceans, remote regions, and disaster zones. Standardized beginning with 3GPP Release 17, with subsequent enhancements in Releases 18 and 19, 5G NTN has transitioned from research and prototypes into practical deployments and early service rollouts. The technology operates across FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 71 GHz) spectrum bands, with recent expansion into Ka and Ku bands and future targeting of Upper C-band, Q/V, E, and D bands. The architecture comprises four segments—ground, air, space, and network—supporting diverse deployment models. Two satellite approaches exist: simple transparent relays enabling faster deployment but with higher round-trip times, and regenerative payloads offering onboard processing and reduced latency at increased complexity. Managing interference across wide coverage areas requires specific metrics including power flux density (PFD) and equivalent power flux density (EPFD). Physical layer adaptations address Doppler effects, propagation delays, and pathloss through advanced antenna systems and beamforming, with comprehensive protocol stack modifications required across all network layers.