SYNCHRONOUS NETWORK DEVICE

PROBLEM TO BE SOLVED: To provide a method for clock synchronization between plural ports of a physical layer device and a synchronization device.SOLUTION: A control method includes a step of selecting a port serving as the source of a ground master clock (302). The selected port reproduces the groun...

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Bibliographische Detailangaben
1. Verfasser:	BARKAN OZDAL
Format:	Patent
Sprache:	eng
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY MULTIPLEX COMMUNICATION PHYSICS TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for clock synchronization between plural ports of a physical layer device and a synchronization device.SOLUTION: A control method includes a step of selecting a port serving as the source of a ground master clock (302). The selected port reproduces the ground master clock on the basis of transmission from a link destination. A multiport PHY IC outputs the RX_CLK of a ground master source port (304). The TX_CLK of the ground master source port is obtained from a local oscillator (306). Then, the TX_CLK of all the other ports are obtained from the output of a clock synchronization unit (308). The synchronization unit causes clock synchronization on the basis of reproduction clock from the multiport PHY IC having the ground master source port (310).