| 摘要 |
A communication device has a transmission/reception unit and a communication processing unit. The transmission/reception unit is formed in accordance with multiple communication methods. The communication processing unit selects one of the multiple communication methods in accordance with a predetermined selection rule for each time slot based on a device time, and establishes communication via the transmission/reception unit by means of the selected communication method. In a time synchronization master process (101), a first communication device includes the device time (Tdev) thereof as a time stamp (128) in a time synchronization request signal (120), and transmits the time synchronization request signal (120). In a time synchronization slave process (102), a second communication device receives the time synchronization request signal (120), and calibrates the device time (Tdev) of the second communication device on the basis of the time stamp (128) in the time synchronization request signal (120). |
