GB1136282A - Improvements in data transmission systems - Google Patents
Improvements in data transmission systemsInfo
- Publication number
- GB1136282A GB1136282A GB1288566A GB1288566A GB1136282A GB 1136282 A GB1136282 A GB 1136282A GB 1288566 A GB1288566 A GB 1288566A GB 1288566 A GB1288566 A GB 1288566A GB 1136282 A GB1136282 A GB 1136282A
- Authority
- GB
- United Kingdom
- Prior art keywords
- error
- data
- signal
- characters
- transmitter
- 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
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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/189—Transmission or retransmission of more than one copy of a message
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Dc Digital Transmission (AREA)
- Television Systems (AREA)
Abstract
1,136,282. Digital transmission systems. COMPAGNIE FRANCAISE THOMSON HOUSTON - HOTCHKISS BRANDT. 23 March, 1966 [24 March, 1965], No. 12885/66. Heading H4P. In a digital data transmission system detection of an error in the received data causes a return error-indicating signal to be passed to the transmitter. On reception of this signal, the transmitter sends a special character repeatedly. When this is correctly received the error-indicating signal is stopped. Consequent on this cessation the transmitter sends data previously transmitted but received faulty, followed by normal traffic. In the embodiment described, under faultfree conditions parallel bit data characters are converted to serial form and transmitted. The received signals are checked for errors and passed via a first register to a second register which feeds parallel-bit data to the output. If any error is detected an error signal is returned to the transmitter, whereupon transmission of data characters is stopped and instead a special character is sent repeatedly, The error signal also enables a cyclic counter which starts stepping at character rate. If the capacity of the counter is n the number of special characters sent is a multiple of n. When a special character is recognized at the receiver the return error signal is stopped. At the transmitter this causes the cessation of transmission of special signal at the end of the current cycle of n such characters, following which n parallel-bit signals from a store, which contains data previously transmitted and received faulty, are serialized and sent to the receiver. The counter is now disabled and transmission of data characters takes place as normal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR10493A FR1460536A (en) | 1965-03-24 | 1965-03-24 | Improvements to data transmission systems |
| FR14007A FR89106E (en) | 1965-03-24 | 1965-04-21 | Improvements to data transmission systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1136282A true GB1136282A (en) | 1968-12-11 |
Family
ID=26162620
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1288566A Expired GB1136282A (en) | 1965-03-24 | 1966-03-23 | Improvements in data transmission systems |
| GB1697266A Expired GB1136452A (en) | 1965-03-24 | 1966-04-18 | Improvements in data transmission systems |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1697266A Expired GB1136452A (en) | 1965-03-24 | 1966-04-18 | Improvements in data transmission systems |
Country Status (8)
| Country | Link |
|---|---|
| BE (2) | BE677838A (en) |
| CH (2) | CH441427A (en) |
| DE (2) | DE1462474A1 (en) |
| ES (1) | ES324475A1 (en) |
| FR (2) | FR1460536A (en) |
| GB (2) | GB1136282A (en) |
| NL (2) | NL6603790A (en) |
| SE (1) | SE332200B (en) |
-
1965
- 1965-03-24 FR FR10493A patent/FR1460536A/en not_active Expired
- 1965-04-21 FR FR14007A patent/FR89106E/en not_active Expired
-
1966
- 1966-03-15 BE BE677838A patent/BE677838A/xx unknown
- 1966-03-22 ES ES0324475A patent/ES324475A1/en not_active Expired
- 1966-03-23 CH CH418766A patent/CH441427A/en unknown
- 1966-03-23 NL NL6603790A patent/NL6603790A/xx unknown
- 1966-03-23 GB GB1288566A patent/GB1136282A/en not_active Expired
- 1966-03-23 DE DE19661462474 patent/DE1462474A1/en active Pending
- 1966-04-07 BE BE679192A patent/BE679192A/xx unknown
- 1966-04-18 GB GB1697266A patent/GB1136452A/en not_active Expired
- 1966-04-20 SE SE537466A patent/SE332200B/xx unknown
- 1966-04-21 DE DE1966C0038838 patent/DE1462479A1/en active Pending
- 1966-04-21 CH CH579566A patent/CH493972A/en unknown
- 1966-04-21 NL NL6605335A patent/NL6605335A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR1460536A (en) | 1966-01-07 |
| NL6603790A (en) | 1966-09-26 |
| DE1462479A1 (en) | 1969-01-16 |
| FR89106E (en) | 1967-05-12 |
| CH441427A (en) | 1967-08-15 |
| ES324475A1 (en) | 1967-02-01 |
| BE679192A (en) | 1966-10-07 |
| CH493972A (en) | 1970-07-15 |
| NL6605335A (en) | 1966-10-24 |
| GB1136452A (en) | 1968-12-11 |
| SE332200B (en) | 1971-02-01 |
| BE677838A (en) | 1966-09-15 |
| DE1462474A1 (en) | 1969-01-02 |
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