Patent ID: 8295267
Filing Date: 2012-10-23
Classification: H04J,H04L

Abstract:
1. A clock synchronization system comprising: a clock master side device that generates a master clock; a clock slave side device connected to the clock master side device via a network; and a clock synchronization function unit connected to clock slave side device, wherein the clock slave side device includes: a synchronization information detection unit that detects synchronization information for clock synchronization from communication information transmitted from the clock master side and received by the clock slave side device, and that associates the synchronization information with time information in the clock slave side device when the synchronization information is detected; and a calculation/decision unit that decides, based on detection time information of the synchronization information currently received, detection time information of at least one synchronization information up to the synchronization information received last time, and a predetermined transmission period information of the synchronization information, whether or not a predetermined condition regarding the transmission period of the synchronization information is met, the calculation/decision unit supplying the currently detected synchronization information to the clock synchronization function unit in case it is decided that the condition is met, the calculation/decision unit discarding the currently detected synchronization information in case it is decided that the condition is not met, the clock synchronization function unit performing clock synchronization using the synchronization information supplied from the calculation/decision unit.