JPS5767355A - Data transmission controlling system at loop transmission system - Google Patents

Data transmission controlling system at loop transmission system

Info

Publication number
JPS5767355A
JPS5767355A JP14381680A JP14381680A JPS5767355A JP S5767355 A JPS5767355 A JP S5767355A JP 14381680 A JP14381680 A JP 14381680A JP 14381680 A JP14381680 A JP 14381680A JP S5767355 A JPS5767355 A JP S5767355A
Authority
JP
Japan
Prior art keywords
frame
transmission
transmitter
address
special
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
JP14381680A
Other languages
Japanese (ja)
Inventor
Masahiro Tada
Hiroshi Yamaguchi
Yukio Kimura
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.)
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon 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 NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14381680A priority Critical patent/JPS5767355A/en
Publication of JPS5767355A publication Critical patent/JPS5767355A/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
    • H04L12/427—Loop networks with decentralised control
    • H04L12/433—Loop networks with decentralised control with asynchronous transmission, e.g. token ring, register insertion

Landscapes

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

Abstract

PURPOSE:To give a transmission right forcibly to a special data transmitter, by sending a message on a transmission path with special frame construction when each data transmitter gains the transmission right and by making the controller of the special master unnecessary. CONSTITUTION:Plural data transmitters reconnected with a loop transmission path and the frame information having a address information field to keep a transmission right for data transmission is sent through the loop path. This frame consists of a flag F to discriminate the end and start of the frame, the address DA of the transmitter which receives the frame, the address SA of the transmitter which transmits the frame and TKN which indicates that the frame is the transmission frame. When the frame is a message frame, TKN is set to I. When the value of field DA indicates the special address, the assigned transmitter gains the transmission right and when it is provided for all the transmitters, the transmitter which fetches the frame information at first can obtain the transmission right.
JP14381680A 1980-10-15 1980-10-15 Data transmission controlling system at loop transmission system Pending JPS5767355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14381680A JPS5767355A (en) 1980-10-15 1980-10-15 Data transmission controlling system at loop transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14381680A JPS5767355A (en) 1980-10-15 1980-10-15 Data transmission controlling system at loop transmission system

Publications (1)

Publication Number Publication Date
JPS5767355A true JPS5767355A (en) 1982-04-23

Family

ID=15347623

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14381680A Pending JPS5767355A (en) 1980-10-15 1980-10-15 Data transmission controlling system at loop transmission system

Country Status (1)

Country Link
JP (1) JPS5767355A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611274A (en) * 1982-07-30 1986-09-09 Sharp Kabushiki Kaisha Data transmission system via power supply line
JPS6248833A (en) * 1985-08-28 1987-03-03 Hitachi Ltd Token system
JPS62290232A (en) * 1986-06-10 1987-12-17 Yamatake Honeywell Co Ltd Transmission right taking over system
JPS62290233A (en) * 1986-06-10 1987-12-17 Yamatake Honeywell Co Ltd Transmission right taking over system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156301A (en) * 1974-06-05 1975-12-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156301A (en) * 1974-06-05 1975-12-17

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4611274A (en) * 1982-07-30 1986-09-09 Sharp Kabushiki Kaisha Data transmission system via power supply line
JPS6248833A (en) * 1985-08-28 1987-03-03 Hitachi Ltd Token system
JPS62290232A (en) * 1986-06-10 1987-12-17 Yamatake Honeywell Co Ltd Transmission right taking over system
JPS62290233A (en) * 1986-06-10 1987-12-17 Yamatake Honeywell Co Ltd Transmission right taking over system

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