FREQUENCY DIFFERENCE DETECTION DEVICE, FREQUENCY DIFFERENCE DETECTION METHOD, AND PROGRAM

摘要

The present disclosure relates to a frequency difference detection device that can synchronize oscillation frequency with a master device in a network with high precision, and also relates to a frequency difference detection method and a program. A frequency difference detection device as one aspect of the present disclosure is a frequency difference detection device that detects a difference in oscillation frequency between a master device and a slave device connected to each other via a network. The frequency difference detection device includes: a first subtracting unit that calculates a difference between a transmission time T1 contained in a sync message transmitted periodically from the master device and a reception time T2 at which the message has been received; a second subtracting unit that calculates a difference between a result of a subtraction T2 i - T1 i performed by the first subtracting unit for the sync message received for the ith time, and a result of a subtraction T2 i-k - T1 i-k performed by the first subtracting unit for the sync message received for the (i - k)th time; and a first dividing unit that divides a result of the subtraction performed by the second subtracting unit by k. The present disclosure can be applied to a PTP slave, for example.