Method, apparatus, and system for time synchronization

摘要

A method, apparatus, and system for time synchronization are disclosed. The method comprising: obtaining a master sending time stamp, a slave receiving time stamp, a slave sending time stamp, and a master receiving time stamp; and adjusting the time of the slave clock according to the offset calculated from the time stamps to synchronize with the clock time of the master clock. With the present invention, in passband transmission systems that transmit signals continuously in units of symbols, the time synchronization is implemented between the master clock and the slave clock.

主权项

1. A method for time synchronization in a Discrete Multi Tone (DMT) system, the method comprising:
obtaining a master sending time stamp, a slave receiving time stamp, a slave sending time stamp, and a master receiving time stamp; and adjusting a slave clock according to an offset calculated from the master sending time stamp, the slave receiving time stamp, the slave sending time stamp and the master receiving time stamp to synchronize the slave clock with a master clock; wherein the master sending time stamp is taken by the master clock when a sample of a first DMT symbol at a specific position of the first DMT symbol is sent from a master clock side; the slave receiving time stamp is taken by the slave clock when sample of the first DMT symbol at the specific position of the first DMT symbol is received at a slave clock side; the slave sending time stamp is taken by the slave clock when a sample of a second DMT symbol at a specific position of the second DMT symbol is sent from the slave clock side; and the master receiving time stamp is taken by the master clock when the sample of the second DMT symbol at the specific position of the second DMT symbol is received at the master clock side.