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:
Apr. 08, 1997
Filed:
Jun. 07, 1995
Shigeo Tani, Osaka, JP;
Katsuaki Yamanaka, Osaka, JP;
Hironori Aono, Osaka, JP;
Toshiaki Kinoshita, Osaka, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A digital communication system includes a first station, a second station and a network therebetween. The first station includes a clock selecting device for selecting one clock from a plurality of different clocks; and a transmitting device for transmitting frames to the second station based on the selected clock. The second station includes an evaluating device for evaluating transmission quality of data in each of the frames received from the first station; and a quality message inserting device for inserting the evaluated transmission quality as a quality message into a part of the corresponding frame to be transmitted to the first station. The first station further includes a message processing device for extracting the quality message from each received frame to convert the extracted quality message into a corresponding message signal to output the message signal; and a control device for causing the clock selecting device to select a clock corresponding to the message signal output from the message processing device.