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.

Date of Patent:
May. 12, 1998

Filed:

Dec. 01, 1995
Applicant:
Inventors:

Takafumi Kojima, Yokohama, JP;

Sotaro Hiroshima, Chigasaki, JP;

Toshiro Suzuki, Tama, JP;

Yasuo Kogure, Yokohama, JP;

Akio Yasuda, Yokohama, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08C / ;
U.S. Cl.
CPC ...
39518204 ; 455 95 ;
Abstract

The detection of any transmission error having developed between a central station and a transmitting station, and the start of a counterplan to the transmission error are realized by a simple construction. The central station transmits messages to which error correcting codes for correcting the transmission errors of the respective messages are affixed, to receivers via the transmitting stations through radio communications. Each of the receivers corrects the transmission error which has developed in relation to the message received through the radio communications, by the use of the error correcting code affixed to the particular message. On the other hand, each of the transmitting stations for relaying the messages detects whether or not the transmission error has developed in relation to the message received from the central station, by the use of the error correcting code affixed to the particular message, and it executes predetermined failure counterplan processing in a case where frequency in the transmission error detection has exceeded a predetermined frequency value.


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