Invention Grant
- Patent Title: Frame transmission device and synchronization method
- Patent Title (中): 帧传输设备和同步方法
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Application No.: US13600990Application Date: 2012-08-31
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Publication No.: US08837532B2Publication Date: 2014-09-16
- Inventor: Masatake Miyabe
- Applicant: Masatake Miyabe
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Staas & Halsey LLP
- Priority: JP2011-248517 20111114
- Main IPC: H04J3/06
- IPC: H04J3/06 ; H04L12/26
Abstract:
A frame transmission device includes: a clock section; a path control section to switch a plurality of transmission paths for exchanging a time synchronization frame with a node device that measures a reference time; a fluctuation estimation section to set a fluctuation estimate of a transmission delay of the time synchronization frame on each of the plurality of transmission paths; and a time synchronization section to synchronize the clock section to the reference time in accordance with a time synchronization frame exchanged on a selected transmission path selected from among the plurality of transmission paths based on the fluctuation estimate.
Public/Granted literature
- US20130121351A1 FRAME TRANSMISSION DEVICE AND SYNCHRONIZATION METHOD Public/Granted day:2013-05-16
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