The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 2010
Filed:
Apr. 25, 2005
Norihisa Uchimoto, Kawasaki, JP;
Koji Tatsumi, Kawasaki, JP;
Kazuhisa Shimazaki, Kawasaki, JP;
Koichiro Yamada, Kawasaki, JP;
Satoshi Namura, Kawasaki, JP;
Akio Morimoto, Kawasaki, JP;
Michio Kusayanagi, Kawasaki, JP;
Norihisa Uchimoto, Kawasaki, JP;
Koji Tatsumi, Kawasaki, JP;
Kazuhisa Shimazaki, Kawasaki, JP;
Koichiro Yamada, Kawasaki, JP;
Satoshi Namura, Kawasaki, JP;
Akio Morimoto, Kawasaki, JP;
Michio Kusayanagi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A first communication device receives an ATM cell bound for a second ATM device from a first ATM device via an ATM interface, and then the first communication device sends a data frame including the ATM cell to the second ATM device via wide area Ethernet. In addition, the first communication device sends a synchronization frame to the second ATM device via the wide area Ethernet continuously at a predetermined time interval in accordance with a clock frequency of the first ATM device. A second communication device receives the synchronization frame and measures a clock frequency of the first ATM device in accordance with a time interval of receiving the synchronization frame so as to reproduce a clock having the same frequency as the measured clock frequency. After that, the second communication device sends the clock to the second ATM device via an ATM interface.