GB1229068A – – Google Patents
GB1229068A – – Google Patents
Info
Publication number
GB1229068A
GB1229068A
GB1229068DA
GB1229068A
GB 1229068 A
GB1229068 A
GB 1229068A
GB 1229068D A
GB1229068D A
GB 1229068DA
GB 1229068 A
GB1229068 A
GB 1229068A
Authority
GB
United Kingdom
Prior art keywords
rate
buffer
characters
character
printer
Prior art date
1968-05-10
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
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.)
1968-05-10
Filing date
1969-04-29
Publication date
1971-04-21
1969-04-29
Application filed
filed
Critical
1971-04-21
Publication of GB1229068A
publication
Critical
patent/GB1229068A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
Y02D30/00—Reducing energy consumption in communication networks
Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
1,229,068. Digital transmission systems. NETHERLANDS POSTAL & TELECOMMUNICATION SERVICE, DIRECTOR GENERAL OF. 29 April, 1969 [10 May, 1968], No. 21806/69. Heading H4P. In a digital transmission system in which errors are corrected by requested repetition, reduction in the useful character rate on the transmission channel owing to the repetitions is at least partially compensated by making the actual rate on the channel higher than the character rate of the overall system. As characters are received from the channel at a greater rate than they are delivered to the output printer a buffer store precedes the printer. To prevent the buffer from overflowing idle signals are transmitted when necessary. Transmitter.-5-bit characters read from a store are passed to a radio transmission channel at a character rate V#a. Each time a character is read out a counter is incremented. The counter is decremented by clock pulses at a rate equal to the rate Va at which characters are read from the receiver buffer to the printer. The instantaneous count consequently represents the number of characters in the receiver buffer at the corresponding point in the received sequence of characters. If the count reaches 5 the buffer will be full. To prevent overflow, read out from the store is stopped while an idle signal is transmitted. Receiver.-The received signals, except idle signals, are passed to the first stage of a shift register buffer which has 5 stages, each of which can store one character. A counter is incremented at rate V#a and decremented at rate Va, as at the transmitter, and causes the appropriate stage of the buffer to be read to a shift register which passes serial-bit characters at rate Va to the printer. In the event of an isolated 4-character repetition cycle the printer will receive an uninterrupted flow of characters, characters being supplied from the buffer during the 4-character period in which input to the buffer is prevented.
GB1229068D
1968-05-10
1969-04-29
Expired
GB1229068A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NL6806678A
NL6806678A
(en)
1968-05-10
1968-05-10
Publications (1)
Publication Number
Publication Date
GB1229068A
true
GB1229068A
(en)
1971-04-21
Family
ID=19803600
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1229068D
Expired
GB1229068A
(en)
1968-05-10
1969-04-29
Country Status (8)
Country
Link
US
(1)
US3593281A
(en)
JP
(1)
JPS4818644B1
(en)
BE
(1)
BE732789A
(en)
CH
(1)
CH487554A
(en)
DE
(1)
DE1922999B2
(en)
FR
(1)
FR2008209A1
(en)
GB
(1)
GB1229068A
(en)
NL
(2)
NL6806678A
(en)
Families Citing this family (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3649756A
(en)
*
1970-12-16
1972-03-14
Computer Transceiver Systems
Generator of binary-coded representations of symbols
JPS4982202A
(en)
*
1972-12-12
1974-08-08
US4270205A
(en)
*
1979-02-27
1981-05-26
Phillips Petroleum Company
Serial line communication system
US4390947A
(en)
*
1979-02-27
1983-06-28
Phillips Petroleum Company
Serial line communication system
DE2938871A1
(en)
*
1979-09-26
1981-04-09
Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt
Mobile equipment data transmission system – uses interference compensating system with bit counting method to establish length of data blocks
DE3876776T2
(en)
*
1988-01-22
1993-07-01
Ibm
REDUCING CONTROL FLOW IN SELECTIVE REPEAT PROTOCOLS.
US5127013A
(en)
*
1988-07-01
1992-06-30
Canon Kabushiki Kaisha
Data communication system
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2805278A
(en)
*
1951-09-04
1957-09-03
Nederlanden Staat
Telegraph system
US3421147A
(en)
*
1965-05-07
1969-01-07
Bell Telephone Labor Inc
Buffer arrangement
0
NL
NL137561D
patent/NL137561C/xx
active
1968
1968-05-10
NL
NL6806678A
patent/NL6806678A/xx
unknown
1969
1969-04-29
GB
GB1229068D
patent/GB1229068A/en
not_active
Expired
1969-05-06
DE
DE19691922999
patent/DE1922999B2/en
active
Pending
1969-05-06
US
US822189A
patent/US3593281A/en
not_active
Expired – Lifetime
1969-05-06
CH
CH692369A
patent/CH487554A/en
not_active
IP Right Cessation
1969-05-07
FR
FR6914653A
patent/FR2008209A1/fr
not_active
Withdrawn
1969-05-09
BE
BE732789D
patent/BE732789A/xx
unknown
1969-05-10
JP
JP44035697A
patent/JPS4818644B1/ja
active
Pending
Also Published As
Publication number
Publication date
DE1922999B2
(en)
1972-05-04
NL6806678A
(en)
1969-11-12
US3593281A
(en)
1971-07-13
JPS4818644B1
(en)
1973-06-07
CH487554A
(en)
1970-03-15
BE732789A
(en)
1969-10-16
DE1922999A1
(en)
1969-11-20
NL137561C
(en)
FR2008209A1
(en)
1970-01-16
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Legal Events
Date
Code
Title
Description
1971-09-02
PS
Patent sealed
1973-11-21
PLNP
Patent lapsed through nonpayment of renewal fees
