GB1470883A - Data communications system and its method of operation - Google Patents

Data communications system and its method of operation

Info

Publication number
GB1470883A
GB1470883A GB1286474A GB1286474A GB1470883A GB 1470883 A GB1470883 A GB 1470883A GB 1286474 A GB1286474 A GB 1286474A GB 1286474 A GB1286474 A GB 1286474A GB 1470883 A GB1470883 A GB 1470883A
Authority
GB
United Kingdom
Prior art keywords
data
station
block
received
receiving station
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.)
Expired
Application number
GB1286474A
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of GB1470883A publication Critical patent/GB1470883A/en
Expired 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
    • 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
    • H04L1/1809—Selective-repeat protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1848—Time-out mechanisms
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms

Landscapes

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

Abstract

1470883 Data transmission; error correction TEXAS INSTRUMENTS Inc 22 March 1974 [2 April 1973] 12864/74 Heading H4P In a communication system a transmitting station 10 or 11, Figs. 1 and 2, transmits blocks of data including an identification code for each block of data to a receiving station 11 or 10 without waiting for acknowledgements of preceding blocks from the receiving station, and the receiving station stores the identification codes of those blocks of received data which contain an error and transmits to the transmitting station a message including the identification code of each block of received data and a response portion to indicate whether the block was received correctly or contained an error. The transmitting station is then responsive to the identification codes received from the receiving station to retransmit to the receiving station only those blocks of data which contained errors. Each station 10 or 11 includes both a transmitter and a receiver unit 15 to provide duplex operation over lines 22. The transmit-receive unit 15 includes a data concentrator and computer interface unit (20, Fig. 4, not shown) which is disclosed in detail (Figs. 5 and 6, not shown) and includes a parity check function (51) and a transmitter receiver (21) which is also disclosed in detail (Figs. 7 and 8A, 8B, not shown). Each station 10, 11 has a computer 12 which includes a central processor 17, a memory unit 18 and a direct memory access 19. The received blocks of data at the receiving station are checked to determine blocks containing errors. This checking is performed by a cyclic redundancy comparison of the data with a cyclic redundancy code transmitted by the transmitting station. Logic circuits including shift registers (101 Figs. 9A and 9B, not shown) are used in the transmitter and receiver respectively to perform the cyclic redundancy check. In checking the received data the numeric binary value of the data block is divided by a constant and the remainder of the division is compared with a remainder provided by the transmitting station for the same block of data. At the transmitting station the numeric binary value of each data block is divided by a constant and a code representative of the remainder of such a division is transmitted to the receiving station. If the number of retransmissions of the incorrectly received block exceeds a preset value such as three an equipment failure is indicated.
GB1286474A 1973-04-02 1974-03-22 Data communications system and its method of operation Expired GB1470883A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US34725273A 1973-04-02 1973-04-02

Publications (1)

Publication Number Publication Date
GB1470883A true GB1470883A (en) 1977-04-21

Family

ID=23362953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1286474A Expired GB1470883A (en) 1973-04-02 1974-03-22 Data communications system and its method of operation

Country Status (4)

Country Link
JP (1) JPS5028203A (en)
CA (1) CA1035048A (en)
DE (1) DE2415890C2 (en)
GB (1) GB1470883A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198018A (en) * 1986-10-28 1988-06-02 Hitachi Ltd Simultaneous data communication
EP1201047A1 (en) * 1999-08-02 2002-05-02 Samsung Electronics Co., Ltd. Apparatus and method for retransmitting data according to radio link protocol in mobile communication system
EP1322075B1 (en) * 2001-12-18 2009-06-24 Samsung Electronics Co., Ltd. Improving connection rate in wireless communication
CN114747148A (en) * 2019-12-20 2022-07-12 松下电器（美国）知识产权公司 Communication device and communication method for multi-link block acknowledgement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2252020A (en) * 1990-12-04 1992-07-22 Ibm Flow control in data communication systems.
JP2589442B2 (en) * 1993-03-31 1997-03-12 三洋電機株式会社 Memory control circuit and memory control method for FM multiplex broadcast receiver
DE10115804A1 (en) * 2001-03-30 2002-10-10 Bayerische Motoren Werke Ag Operating method for data bus for several subscribers involves placing information on bus, which is fault-free during error, after error at time and during period outside error time interval

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198018A (en) * 1986-10-28 1988-06-02 Hitachi Ltd Simultaneous data communication
US4896151A (en) * 1986-10-28 1990-01-23 Hitachi, Ltd. Simultaneous communication method and system
GB2198018B (en) * 1986-10-28 1991-05-15 Hitachi Ltd Simultaneous communication method and system
EP1201047A1 (en) * 1999-08-02 2002-05-02 Samsung Electronics Co., Ltd. Apparatus and method for retransmitting data according to radio link protocol in mobile communication system
EP1201047A4 (en) * 1999-08-02 2009-11-11 Samsung Electronics Co Ltd Apparatus and method for retransmitting data according to radio link protocol in mobile communication system
EP1322075B1 (en) * 2001-12-18 2009-06-24 Samsung Electronics Co., Ltd. Improving connection rate in wireless communication
CN114747148A (en) * 2019-12-20 2022-07-12 松下电器（美国）知识产权公司 Communication device and communication method for multi-link block acknowledgement

Also Published As

Publication number Publication date
CA1035048A (en) 1978-07-18
DE2415890A1 (en) 1974-10-10
JPS5028203A (en) 1975-03-22
DE2415890C2 (en) 1984-08-02

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940321