TIME CONTROL DEVICE, TIME CONTROL METHOD, AND PROGRAM

摘要

The present disclosure relates to a time control device, a time control method, and a program that can synchronize time information with a master device in a network with high precision.;The time control device as one aspect of the present disclosure includes: a first calculating unit that calculates a first time difference based on the transmission times and the reception times of messages exchanged with the master device, the first time difference indicating a difference between time information about the master device and time information about the slave device; a second calculating unit that calculates a second time difference based on the transmission time and the reception time of the message transmitted from the master device to the slave device; a third calculating unit that calculates a third time difference based on the transmission time and the reception time of the message transmitted from the slave device to the master device; and an adjusting unit that adjusts the time information about the slave device in accordance with a feedback control value generated based on a selected one of the first through third time differences. The present disclosure can be applied to a PTP slave, for example.

主权项

1. A time control device that is installed in a slave device, and synchronizes time information with a master device to which the slave device is connected via a network,
the time control, device comprising: a first calculating unit configured to calculate a first time difference based on transmission times and reception times of messages exchanged with the master device, the first time difference indicating a difference between time information about the master device and time information about the slave device; a second calculating unit configured to calculate a second time difference based on the transmission time and the reception time of the message transmitted from the master device to the slave device, the second time difference indicating a difference between the time information about the master device and the time information about the slave device; a third calculating unit configured to calculate a third time difference based on the transmission time and the reception time of the message transmitted from the slave device to the master device, the third time difference indicating a difference between the time information about the master device and the time information about the slave device; a selecting unit configured to select one of the calculated first through third time differences; a feedback control value generating unit configured to generate a feedback control value based on the selected time difference, the feedback control value being used for performing feedback control on the time information about the slave device; and an adjusting unit configured to adjust the time information about the slave device in accordance with the generated feedback control value.