Patent ID: 9154292
Filing Date: 2015-10-06
Classification: H04B,H04J,H04L

Abstract:
1. A communication apparatus operating as a slave apparatus that performs time synchronization with a master apparatus on the basis of a time synchronization message transmitted from the master apparatus at a fixed cycle, the communication apparatus comprising a control unit that stores, in a transmission request message for requesting transmission of the time synchronization message, a requesting transmission rate, which is a requesting value of a transmission rate of the time synchronization message, and transmits the transmission request message to the master apparatus, a clock extracting unit that extracts a clock transmitted from the master apparatus; and a clock generating unit that generates an its own clock, which is a clock generated by its own apparatus, wherein the control unit the control unit selects any one of the clock extracted by the clock extracting unit and its own clock on the basis of clock synchronization information that is notified from the master apparatus and that includes information indicating a reference clock source being used in the master apparatus and information indicating whether the master apparatus synchronizes with the reference clock source.