JPS5737953A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS5737953A
JPS5737953A JP11128080A JP11128080A JPS5737953A JP S5737953 A JPS5737953 A JP S5737953A JP 11128080 A JP11128080 A JP 11128080A JP 11128080 A JP11128080 A JP 11128080A JP S5737953 A JPS5737953 A JP S5737953A
Authority
JP
Japan
Prior art keywords
delivers
proceeding
patterns
station
secondary 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.)
Pending
Application number
JP11128080A
Other languages
Japanese (ja)
Inventor
Kensuke Uehara
Seishi Kinoshita
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11128080A priority Critical patent/JPS5737953A/en
Publication of JPS5737953A publication Critical patent/JPS5737953A/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
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/423—Loop networks with centralised control, e.g. polling

Landscapes

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

Abstract

PURPOSE:To make it possible that each secondary station transmits data equally with one time poling, by delivering proceeding patterns after a plural number of flag information are delivered, in a loop type data transmitting system adopting SDLG procedure. CONSTITUTION:When data are transmitted from a secondary station 200i to a primary station 100, the primary station 100 periodically delivers optional responding OPR pole commands, performs polings, and then, delivers proceeding patterns. In this case, however, the primary station 100 delivers a plural number of dummy flags FDs after delivering the ORP commands, and delivers the proceeding patterns after a dummy time has passed. The secondary station 200i which is required to send data, produces flags after receiving proceeding patterns, and then, delivers frames. The frame is sent to the primary station 100 after passing through lower stations 200i+1, 200i+2 successively. Therefore, a time which is enough to prepare data transmission, is given to the secondary station 200i which has the highest priority, and, in this way, each secondary station can equally make data transmission with one time poling.
JP11128080A 1980-08-13 1980-08-13 Data transmission system Pending JPS5737953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11128080A JPS5737953A (en) 1980-08-13 1980-08-13 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11128080A JPS5737953A (en) 1980-08-13 1980-08-13 Data transmission system

Publications (1)

Publication Number Publication Date
JPS5737953A true JPS5737953A (en) 1982-03-02

Family

ID=14557218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11128080A Pending JPS5737953A (en) 1980-08-13 1980-08-13 Data transmission system

Country Status (1)

Country Link
JP (1) JPS5737953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57174961A (en) * 1981-04-22 1982-10-27 Oki Electric Ind Co Ltd Group polling method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57174961A (en) * 1981-04-22 1982-10-27 Oki Electric Ind Co Ltd Group polling method

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