JPS5573156A - Data communication system - Google Patents

Data communication system

Info

Publication number
JPS5573156A
JPS5573156A JP14528178A JP14528178A JPS5573156A JP S5573156 A JPS5573156 A JP S5573156A JP 14528178 A JP14528178 A JP 14528178A JP 14528178 A JP14528178 A JP 14528178A JP S5573156 A JPS5573156 A JP S5573156A
Authority
JP
Japan
Prior art keywords
reception
ack signal
elimination filter
band elimination
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14528178A
Other languages
Japanese (ja)
Inventor
Kazumasa Kumakura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14528178A priority Critical patent/JPS5573156A/en
Publication of JPS5573156A publication Critical patent/JPS5573156A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1692—Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To realize an ARQ system of the perfect full double system by installing the band elimination filter to eliminate the single frequency response signal which is sent back to the transmission side from the reception side and then carrying out only the data transfer via the band elimination filter. CONSTITUTION:The data is sent out from transmission side (a) via MODEM M and band elimination filter BF, and thus the frequency component of the affirmative answer character ACk signal is eliminated. As a result, no erroneous detection is given to the ACK signal frequency component. While at the reception side (b), the reception signal is supplied to MODEM M via BF, and thus the ACK signal generated from ACK signal generator circuit A of the reception side is eliminated. As a result, no bit error is caused to the reception data.
JP14528178A 1978-11-27 1978-11-27 Data communication system Pending JPS5573156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14528178A JPS5573156A (en) 1978-11-27 1978-11-27 Data communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14528178A JPS5573156A (en) 1978-11-27 1978-11-27 Data communication system

Publications (1)

Publication Number Publication Date
JPS5573156A true JPS5573156A (en) 1980-06-02

Family

ID=15381502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14528178A Pending JPS5573156A (en) 1978-11-27 1978-11-27 Data communication system

Country Status (1)

Country Link
JP (1) JPS5573156A (en)

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