| 摘要 |
<p>The objective of the invention is to achieve a highly accurate frequency deviation control between communication apparatuses. A communication apparatus comprises: a data processing unit that executes a process of clock synchronization between the local communication apparatus and another communication apparatus; and a communication unit that executes communications with the other communication apparatus. During the process of clock synchronization accompanied by transmission/reception of synchronization packets to/from the other communication apparatus, the data processing unit analyzes the transmitted/received packets, thereby calculating, as a measurement signal (Δm -Δs), the difference between a packet transmission interval (Δm) of the other communication apparatus and a packet reception interval (Δs) of the local communication apparatus. Further, the data processing unit selects, on the basis of a delay variation amount obtained by subtracting a frequency change amount from the measurement signal, a measurement signal to be applied to a frequency deviation control. Specifically, the data processing unit determines that a measurement signal the delay variation amount for which is greater than a specified threshold value is improper for the control, while the data processing unit selects only a measurement signal the delay variation amount for which is equal to or less than the specified threshold value, thereby executing the frequency deviation control.</p> |
