JPS551763A - Transmission control system in on-line system - Google Patents

Transmission control system in on-line system

Info

Publication number
JPS551763A
JPS551763A JP7495278A JP7495278A JPS551763A JP S551763 A JPS551763 A JP S551763A JP 7495278 A JP7495278 A JP 7495278A JP 7495278 A JP7495278 A JP 7495278A JP S551763 A JPS551763 A JP S551763A
Authority
JP
Japan
Prior art keywords
transmission
unidirectional transmission
answer
reset
choking
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
JP7495278A
Other languages
Japanese (ja)
Inventor
Ken Ito
Susumu Maruyama
Yasutaka Tsutamune
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7495278A priority Critical patent/JPS551763A/en
Publication of JPS551763A publication Critical patent/JPS551763A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To control the transmission so that the unidirectional transmission from the central unit to terminal can smoothly be made, by unconsciousness of the central unit for the processing state at the terminal, in the ON-line system treating inquiry and answer as the base. CONSTITUTION:The unidirectional transmission data(information outputted unidirectionally) is received at the special buffer 201 to tell it to the operator. FF206 is set with the instruction of unidirectional transmission, and is reset with the release instruction or the end of transmission to recognize various chocking states, and FF207 is set at the end of inquiry and answer and is reset with the instructions other than the end, to recorgnize the time point of the final instruction reception end of inquiry and answer. The logical sum between those outputs and the output of the buffer free detection circuit 219 is fed to the circuit 212 after inversion to inhibit the required input. The logical sum output 209 is inputted to the AND circuits 210, 211 to produce the unidirectional transmission permission, i.e., choking permission SNOD signal for transmission 205. The choking state of emergency or normal is released through the reset of FF206 with the choking release or unidirectional transmission end signal via the decoder 204.
JP7495278A 1978-06-21 1978-06-21 Transmission control system in on-line system Pending JPS551763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7495278A JPS551763A (en) 1978-06-21 1978-06-21 Transmission control system in on-line system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7495278A JPS551763A (en) 1978-06-21 1978-06-21 Transmission control system in on-line system

Publications (1)

Publication Number Publication Date
JPS551763A true JPS551763A (en) 1980-01-08

Family

ID=13562162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7495278A Pending JPS551763A (en) 1978-06-21 1978-06-21 Transmission control system in on-line system

Country Status (1)

Country Link
JP (1) JPS551763A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870384A (en) * 1981-09-24 1983-04-26 Fujitsu Ltd Serial printer controlling system
JPH02192253A (en) * 1989-01-20 1990-07-30 Hitachi Ltd Communication control processor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870384A (en) * 1981-09-24 1983-04-26 Fujitsu Ltd Serial printer controlling system
JPS6246012B2 (en) * 1981-09-24 1987-09-30 Fujitsu Ltd
JPH02192253A (en) * 1989-01-20 1990-07-30 Hitachi Ltd Communication control processor

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