Accurate and reliable time synchronization in telecommunication networks is fundamental to ensure the superior performance of upcoming and next-generation paradigms of mobile communications, such as 5G New Radio (NR). In a modern network infrastructure, sub-microsecond synchronization requires a large number of reliable clocks such as Rubidium (Rb) and Cesium (Cs) atomic oscillators, technologies that are too expensive to be deployed throughout multiple network nodes. To overcome the cost problem, atomic clocks are being replaced by less-expensive GNSS receivers that provide a specific synchronization signal, the Pulse Per Second (1-PPS), that can be exploited to distribute time synchronization across the network at more sustainable costs.