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:
Nov. 07, 1995
Filed:
Jan. 08, 1993
Shigeo Amemiya, Kawasaki, JP;
Takao Ogura, Kawasaki, JP;
Takafumi Chujo, Kawasaki, JP;
Hiroshi Takeo, Kawasaki, JP;
Michio Kusayanagi, Kawasaki, JP;
Naoaki Yamanaka, Tokyo, JP;
Yoichi Sato, Yokohama, JP;
Akihiko Takase, Tokyo, JP;
Shigeo Shinada, Yokohama, JP;
Mituhiro Takano, Yokohama, JP;
Kiyoshi Saitou, Yokohama, JP;
Kazuhiko Hohara, Fujisawa, JP;
Tetuhiro Okabe, Yokohama, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A UPC circuit fault diagnosis system for diagnosing a failure in a UPC circuit controls cell traffic volume on the basis of prescribed information about cell traffic. Failure diagnosis of a UPC circuit is provided by a usage parameter determination of at least one kind of cell, using more than one system and comparing determination results. The diagnosis system has an operating UPC circuit for controlling a total of m kinds of cells, and a standby UPC circuit for controlling a total of n kinds of cells. The system also has a total of q bridge memories for keeping a chronological record of the prescribed information of arriving cells. A fault diagnosis of the bridge memories is provided by comparing the contents of the bridge memories, using more than one system.