Resilient Time Synchronization in 6G Networks: A Hot Standby Solution. - Mahin Ahmed; Raheeb Muzaffar; Damir Hamidovic; Armin Hadziaganovic; Hans-Peter Bernhard; Oliver Höftberger; Franz Profelt; Emilio Trigili; Giulia Bigoni; Marilet De Andrade; János Farkas (IEEE Commun. Stand. Mag., 2025)