JPS5577256A - Transmission control system on multi-drop system - Google Patents

Transmission control system on multi-drop system

Info

Publication number
JPS5577256A
JPS5577256A JP15002778A JP15002778A JPS5577256A JP S5577256 A JPS5577256 A JP S5577256A JP 15002778 A JP15002778 A JP 15002778A JP 15002778 A JP15002778 A JP 15002778A JP S5577256 A JPS5577256 A JP S5577256A
Authority
JP
Japan
Prior art keywords
station
terminal
center station
information block
response
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
JP15002778A
Other languages
Japanese (ja)
Other versions
JPS5751305B2 (en
Inventor
Masaharu Masuda
Mikio Horinouchi
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP15002778A priority Critical patent/JPS5577256A/en
Publication of JPS5577256A publication Critical patent/JPS5577256A/en
Publication of JPS5751305B2 publication Critical patent/JPS5751305B2/ja
Granted 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
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Bus Control (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To improve emergency responsiveness by performing synchronous polling by a center station as to all terminal stations belonging to the center station, and then by making response to only terminal stations in a queue for transferring data to the center station. CONSTITUTION:Transmission controller 11 of center station 1 edits an information block indicating interruption sense polling and then sends it to transmission line 31. To the address area of the information block, lowermost-order terminal station 2N-n is assigned. This information block is received and temporarily stored in terminal station 2N, and also resent to transmission line 31. Through repeated operation mentioned above, reception is continued up to terminal station 2N-n. Terminal station 2N-n edits response data and then sends it to receiving line 32. In other terminal stations 2, change-over switches 26 are changed over and information blocks to center station 1 are editd when there are data to be transferred to center station 1 at this time. Once this information block is sent out to line 32, a block in normal response from lower-order terminal station 2 is cut off, but is transferred only when there is no interruption response of higher-order terminal station 2.
JP15002778A 1978-12-06 1978-12-06 Transmission control system on multi-drop system Granted JPS5577256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15002778A JPS5577256A (en) 1978-12-06 1978-12-06 Transmission control system on multi-drop system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15002778A JPS5577256A (en) 1978-12-06 1978-12-06 Transmission control system on multi-drop system

Publications (2)

Publication Number Publication Date
JPS5577256A true JPS5577256A (en) 1980-06-10
JPS5751305B2 JPS5751305B2 (en) 1982-11-01

Family

ID=15487887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15002778A Granted JPS5577256A (en) 1978-12-06 1978-12-06 Transmission control system on multi-drop system

Country Status (1)

Country Link
JP (1) JPS5577256A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05235954A (en) * 1992-02-24 1993-09-10 Nec Corp Network information retrieval system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50110503A (en) * 1974-02-06 1975-08-30
JPS51110902A (en) * 1975-03-25 1976-09-30 Mitsubishi Electric Corp HOORINGUHOSHIKI
JPS5336114A (en) * 1976-09-16 1978-04-04 Fujitsu Ltd Data transmitting-receiving system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50110503A (en) * 1974-02-06 1975-08-30
JPS51110902A (en) * 1975-03-25 1976-09-30 Mitsubishi Electric Corp HOORINGUHOSHIKI
JPS5336114A (en) * 1976-09-16 1978-04-04 Fujitsu Ltd Data transmitting-receiving system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05235954A (en) * 1992-02-24 1993-09-10 Nec Corp Network information retrieval system

Also Published As

Publication number Publication date
JPS5751305B2 (en) 1982-11-01

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