NODE DEVICE

PROBLEM TO BE SOLVED: To efficiently and quickly obtain a node device which selects a clock for subordinate synchronization with a master node. SOLUTION: The node device performing data transfer, in subordinate synchronism with a master clock becoming the reference clock of synchronous communication...

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Bibliographic Details
Main Authors KITAYAMA KENJI, KAJIMA KAZUYUKI
Format Patent
LanguageEnglish
Published 29.11.2007
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:PROBLEM TO BE SOLVED: To efficiently and quickly obtain a node device which selects a clock for subordinate synchronization with a master node. SOLUTION: The node device performing data transfer, in subordinate synchronism with a master clock becoming the reference clock of synchronous communication on a dual ring network of a bidirectional transmission line comprises an RPR interface transmitter 12 generating a control frame used, when a master node is selected, an inner-side Drop determining section 20 controlling a control frame generated from other node device to be transferred in the transmission direction of a received transmission line, an outer-side Drop determining section 17, a clock switching designator 22 for determining a master node by using the control frame generated from other node device, and a section 23 for switching the clock used, when its own node device performs subordinate synchronization, according to the master node thus determined. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20060136942