Patent ID: 8705578

Claim:
A method for implementing time synchronization in a local area network, wherein the local area network comprises a master system device and a slave system device, and the method comprises: the master system device synchronizing a local time according to a Universal Time Coordinated (UTC) time normally received from a Global Positioning System (GPS) satellite and a network clock aligned with the UTC time, and regularly broadcasting the local time to each network node which serves as the slave system device and needs to perform time synchronization; and the slave system device synchronously updating the local time according to the local time of the maser system device which is received and a local network clock aligned with the network clock of the maser system device; wherein the step of the master system device synchronizing the local time according to the UTC time normally received from the GPS satellite and the network clock aligned with the UTC time comprises: the master system device receiving a UTC time package of the GPS satellite through an UTC time receiving interruption, if the UTC time package is determined to be normally received, parsing the UTC time from the UTC time package; performing timing by a local network synchronization clock interruption aligned with a phase of the UTC time receiving interruption through the network clock, and adding a timed UTC time receiving cycle to the UTC time to be synchronized into the local time of the master system device.