JPS5799840A - Data transmission system of automatic retransmission request system - Google Patents

Data transmission system of automatic retransmission request system

Info

Publication number
JPS5799840A
JPS5799840A JP55175265A JP17526580A JPS5799840A JP S5799840 A JPS5799840 A JP S5799840A JP 55175265 A JP55175265 A JP 55175265A JP 17526580 A JP17526580 A JP 17526580A JP S5799840 A JPS5799840 A JP S5799840A
Authority
JP
Japan
Prior art keywords
block
data
error
detected
signal
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.)
Granted
Application number
JP55175265A
Other languages
Japanese (ja)
Other versions
JPH0157538B2 (en
Inventor
Kazumasa Kumakura
Hiroshi Hishida
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 JP55175265A priority Critical patent/JPS5799840A/en
Publication of JPS5799840A publication Critical patent/JPS5799840A/en
Publication of JPH0157538B2 publication Critical patent/JPH0157538B2/ja
Granted 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
    • 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
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Landscapes

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

Abstract

PURPOSE:To exactly execute the retransmission in response to a request for the retransmittion of an error block, by continuously sending out an acknowledge signal of frequency unless there is an error of a received data, and stopping the acknowledged signal for a short time when an error has been detected. CONSTITUTION:An input data is written in buffer memories 1-3 by a block unit under the control of a write controlling circuit. Each data block of the memories 1-3 is read out in order under the control of a read-out controlling circuit 5 in accordance with an acknowledged signal ACK from the receiving side, which has been detected by an ACK signal detector 6, a block number, a CRC bit, etc. are added to this data block by a transmission data forming circuit 7, and it is transmitted. The receiving side writes said sent data in buffer memories 10-30 at every block through a shift register 11. Unless an error is detected 18 in the block, single frequency is sent continuously to the sending side from an ACK signal generating circuit 19. If an error is detected 18 in the block, the ACK signal is stopped for a short time. When the sending side has detected 6 that there is no ACK signal, a data of the block concerned is retransmitted.
JP55175265A 1980-12-13 1980-12-13 Data transmission system of automatic retransmission request system Granted JPS5799840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55175265A JPS5799840A (en) 1980-12-13 1980-12-13 Data transmission system of automatic retransmission request system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55175265A JPS5799840A (en) 1980-12-13 1980-12-13 Data transmission system of automatic retransmission request system

Publications (2)

Publication Number Publication Date
JPS5799840A true JPS5799840A (en) 1982-06-21
JPH0157538B2 JPH0157538B2 (en) 1989-12-06

Family

ID=15993123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55175265A Granted JPS5799840A (en) 1980-12-13 1980-12-13 Data transmission system of automatic retransmission request system

Country Status (1)

Country Link
JP (1) JPS5799840A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660132A1 (en) * 1990-03-23 1991-09-27 Trt Telecom Radio Electr Information transmission system including a plurality of transmission/reception stations
EP0695053A3 (en) * 1994-07-29 1997-02-05 At & T Corp Asymmetric protocol for wireless communications
US7526705B2 (en) * 2005-05-03 2009-04-28 Agere Systems Inc. Acknowledgement message modification in communication networks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660132A1 (en) * 1990-03-23 1991-09-27 Trt Telecom Radio Electr Information transmission system including a plurality of transmission/reception stations
EP0695053A3 (en) * 1994-07-29 1997-02-05 At & T Corp Asymmetric protocol for wireless communications
US7526705B2 (en) * 2005-05-03 2009-04-28 Agere Systems Inc. Acknowledgement message modification in communication networks
US7895495B2 (en) 2005-05-03 2011-02-22 Agere Systems Inc. Acknowledgement message modification in communication networks

Also Published As

Publication number Publication date
JPH0157538B2 (en) 1989-12-06

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