Abstract: A slave node (104) includes N time regeneration units (105 to 107) each of which communicates with each of N master nodes (101 to 103) to compute a propagation delay between each master node (101 to 103) and the slave node (104) and regenerates a time of each master node (101 to 103), a time comparison unit (108) that independently computes each comparison result between the time of each master node (101 to 103), which is regenerated by each of N time regeneration units (105 to 107), and a reference time held by the slave node (104), and a reference time determination unit (109) that computes each correction value by carrying out weighting for each comparison result computed by the time comparison unit (108) based on the propagation delay and determines a reference time of the slave node (104) by carrying out statistical processing by using the correction value. With this configuration, it is possible to improve precision and accuracy of synchronization of the time of the slave node at low cost.

Abstract: A slave node (104) includes N time regeneration units (105 to 107) each of which communicates with each of N master nodes (101 to 103) to compute a propagation delay between each master node (101 to 103) and the slave node (104) and regenerates a time of each master node (101 to 103), a time comparison unit (108) that independently computes each comparison result between the time of each master node (101 to 103), which is regenerated by each of N time regeneration units (105 to 107), and a reference time held by the slave node (104), and a reference time determination unit (109) that computes each correction value by carrying out weighting for each comparison result computed by the time comparison unit (108) based on the propagation delay and determines a reference time of the slave node (104) by carrying out statistical processing by using the correction value. With this configuration, it is possible to improve precision and accuracy of synchronization of the time of the slave node at low cost.