Time synchronization is critical to 5G infrastructure and fundamental conduit of the network. It begins with the very spectrum on which RAN (Radio Access Network) depends upon. The 5G Radio spectrum uses TDD (Time Division Duplex) as the preferred method of spectrum usage. In TDD, a single frequency is shared for uplink and downlink communications. Given the scarcity of spectrum, TDD allows efficient use of spectrum. That’s not to say that FDD technique of spectrum usage cannot be done in 5G. However, the latter is a rarity and requires two frequencies for communications, an ineffective use of spectrum to say the least.