KT SAT Achieves Seamless NR-NTN Handover for Next-Generation Satellite Networks
Case Studies
KT SAT is advancing non-terrestrial network mobility validation as satellite and terrestrial networks move toward tighter integration. Working with Keysight, KT SAT demonstrated a successful NTN handover using the KOREASAT-6A satellite at KT SAT’s Kumsan Satellite Network Operation Center in Korea.
The companies established an NR-NTN multi-orbit handover between a commercial geostationary earth orbit (GEO) satellite and an emulated low Earth orbit (LEO) link in a controlled lab environment. The demonstration maintained service continuity during the handover and operated over a live Ku-band GEO connection.
KT SAT needed to validate how multi-orbit NTN mobility could work using its GEO satellite infrastructure while also preparing for future LEO and medium Earth orbit service models. The goal was to move beyond point-to-point satellite connectivity and explore continuous service across orbit types.
Keysight and KT SAT used Keysight Network Emulator Solutions and UeSIM RAN Testing Toolset to emulate the base station and user equipment. The teams established a two-way link through KOREASAT-6A and maintained service continuity during handover from GEO to an emulated LEO connection.
By combining live satellite connectivity with emulated LEO conditions, the test environment brought future multi-orbit network behavior into the lab. This allowed KT SAT and Keysight to study mobility behavior, timing, and interoperability under controlled conditions.