TIME SYNCHRONIZATION METHOD AND RELAY APPARATUS

PROBLEM TO BE SOLVED: To achieve time synchronization, even if a transmission time of packet changes. SOLUTION: A relay apparatus 30 includes: a counter 310 that a value for every certain time is added; a counter value providing part 302a that provides a value of the counter 310 to the packet when a...

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1. Verfasser:	TAMURA YOSHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROMECHANICAL CLOCKS OR WATCHES ELECTRONIC TIME-PIECES HOROLOGY MULTIPLEX COMMUNICATION PHYSICS TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Zusammenfassung:	PROBLEM TO BE SOLVED: To achieve time synchronization, even if a transmission time of packet changes. SOLUTION: A relay apparatus 30 includes: a counter 310 that a value for every certain time is added; a counter value providing part 302a that provides a value of the counter 310 to the packet when a packet received by an input port 301a is the packet for time synchronization; and a delay value providing part 307b that calculates a difference between the value provided to the packet by the counter value providing part 302a and the value of the counter 310, and provides the calculated difference to the packet as a delay value, when the packet transmitted from an output port 309b is the packet for time synchronization. COPYRIGHT: (C)2010,JPO&INPIT