Clock synchronization method, mobile network system, network controller and network switch

摘要

A clock synchronization method, a mobile network system, a network controller and a network switch are provided. The method computes a round-trip delay ratio between the network controller and the network switch according to a first delay, of which the network controller transmits a packet to the network switch, and a second delay, of which the network switch transmits another packet to the network controller. The method also locks a first clock based on a time-transfer protocol with the round-trip delay ratio, wherein the first clock is synchronized with a master clock of the network controller. The method further sets the first clock being locked as a runtime clock of the network switch.