Patent ID: 8909969

Claim:
A method for performing time synchronization on a peripheral component interconnect express (PCIE) device, comprising: receiving, by the PCIE device through a synchronization signal interface, a time synchronization signal sent from a clock source device, wherein the time synchronization signal comprises a 1 pulse per second (1 PPS) signal and a Time Of Date (TOD) signal; parsing, by the PCIE device, the time synchronization signal to obtain clock information and time signal carried in the time synchronization signal; and performing, by the PCIE device, the time synchronization according to the clock information and the time signal; wherein the clock source device comprises a master clock source device and a slave clock source device, and the method further comprises: replacing, by the PCIE device, the master clock source device with the slave clock source device to send the time synchronization signal, when the master clock source device has a failure or when no time synchronization signal of the master clock source device meets the requirement.