Clock synchronization system

A slave node in which a clock signal in said slave node is synchronized with a clock signal in a master node by using packets periodically received from said master node through a PSN (Packet Switched Network), said slave node comprising:

• a buffer section having a buffer and configured to temporarily store the packets received from said master node in said buffer, to monitor and output a buffer accumulation amount, and to output data of the packets from said buffer in response to the recovery clock signal;
• a maximum extracting section configured to receive the buffer accumulation amount from said buffer and to extract a maximum value for each time period from the buffer accumulation amount;
• a control section configured to generate a control voltage such that the maximum values from said maximum extracting section are held at a reference value;
• and
• a VCO (Voltage Controlled Oscillator) configured to adjust a frequency of the recovery clock signal based on the control voltage from said control section.

A clock synchronization method of synchronizing a clock signal in said slave node with a clock signal in a master node by using packets periodically received from said master node through a PSN (Packet Switched Network), said clock synchronization method comprising:

• temporarily storing packets received from said master node in a buffer of a buffer section;
• monitoring a buffer accumulation amount;
• outputting data of the packets from said buffer in response to the recovery clock signal;
• extracting a maximum value for each time period from the buffer accumulation amount;
• generating a control voltage such that the maximum values are held at a reference value;
• and
• adjusting a frequency of the recovery clock signal based on the control voltage.

A computer-readable recording medium in which a computer-readable program code is recorded to realize a clock synchronization method of synchronizing a clock signal in said slave node with a clock signal in a master node by using packets periodically received from said master node through a PSN (Packet Switched Network), wherein said clock synchronization method comprises:

• temporarily storing packets received from said master node in a buffer of a buffer section;
• monitoring a buffer accumulation amount;
• outputting data of the packets from said buffer in response to the recovery clock signal;
• extracting a maximum value for each time period from the buffer accumulation amount;
• generating a control voltage such that the maximum values are held at a reference value;
• and
• adjusting a frequency of the recovery clock signal based on the control voltage.