JPS57164639A - Channel access method - Google Patents

Channel access method

Info

Publication number
JPS57164639A
JPS57164639A JP4989581A JP4989581A JPS57164639A JP S57164639 A JPS57164639 A JP S57164639A JP 4989581 A JP4989581 A JP 4989581A JP 4989581 A JP4989581 A JP 4989581A JP S57164639 A JPS57164639 A JP S57164639A
Authority
JP
Japan
Prior art keywords
frame
devices
transmit
channel
data transfer
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
JP4989581A
Other languages
Japanese (ja)
Inventor
Mitsuhiro Ishizaka
Shigeo Nakatsuka
Takane Kakuno
Tachiki Ichihashi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4989581A priority Critical patent/JPS57164639A/en
Publication of JPS57164639A publication Critical patent/JPS57164639A/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]

Landscapes

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

Abstract

PURPOSE:To shorten the average waiting time for data transfer and gather data of respective terminals in a computer approximately simultaneously, by using a data transfer channel constituting a frame while switching this channel for the random access and the fixed access by the control of a period set to a timer of a control device. CONSTITUTION:Plural transmitting devices 1a-1d and a control device 5 are connected in series into a loop through transmission lines 2a-2e, and a frame where data transfer channels and control channels are arranged in time division is transferred circularly onto transmission lines 2a-2e. A timer 12 is provided in the device 5, and a flag indicating the transmission inhibition mode is put on the bit pattern in a prescribed position of the channel to transmit the frame. This flag is detected in devices 1a-1d to set the transmission inhibition mode. After a prescribed time, a flag indicating the fixed mode is put on the bit pattern in a prescribed position by the device 5 to transmit the frame, and devices 1a-1d access transfer channels assigned preliminarily to devices themselves to transmit data.
JP4989581A 1981-04-02 1981-04-02 Channel access method Pending JPS57164639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4989581A JPS57164639A (en) 1981-04-02 1981-04-02 Channel access method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4989581A JPS57164639A (en) 1981-04-02 1981-04-02 Channel access method

Publications (1)

Publication Number Publication Date
JPS57164639A true JPS57164639A (en) 1982-10-09

Family

ID=12843750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4989581A Pending JPS57164639A (en) 1981-04-02 1981-04-02 Channel access method

Country Status (1)

Country Link
JP (1) JPS57164639A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100851A (en) * 1983-11-04 1985-06-04 Hitachi Cable Ltd Circuit exchange type loop network transmission system
JPS62210753A (en) * 1986-03-05 1987-09-16 クセルト　セントロ・ステユデイ・エ・ラボラトリ・テレコミニカチオ−ニ・エツセ・ピ−・ア− Method for accessing to local area network with unidirectional ring transmission line and local area networkusing the method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100851A (en) * 1983-11-04 1985-06-04 Hitachi Cable Ltd Circuit exchange type loop network transmission system
JPS62210753A (en) * 1986-03-05 1987-09-16 クセルト　セントロ・ステユデイ・エ・ラボラトリ・テレコミニカチオ−ニ・エツセ・ピ−・ア− Method for accessing to local area network with unidirectional ring transmission line and local area networkusing the method

Similar Documents

Publication Publication Date Title
JPS55117357A (en) Time-division multiplex communication system
JPS57164639A (en) Channel access method
JPS6472695A (en) Remote supervisory and controlling system
JPS55118249A (en) Data communication control system
JPS6481544A (en) Plural type cdt system using one radio wave
JPS53125704A (en) Dispatching control system utilizing multichannel access system
JPS54116805A (en) Loop transmission system
JPS5699530A (en) Information transfer system
JPS5671352A (en) Multidrop data communication system
JPS56117455A (en) Transmission control system
JPS5647146A (en) Data transmission system
JPS5640346A (en) Data transmission system
JPS56149140A (en) Method and device for data transmission control
JPS52144934A (en) Sending out information intercepting unit
JPS6462045A (en) Node equipment for indefinite communication network
JPS56102141A (en) Digital communication device
JPS526440A (en) Transmission line coupling system
JPS5361943A (en) Data transfer system
JPS55131829A (en) Transfer system of shared memory under communication control
JPS5768948A (en) Data transfer system between central processors
JPS5361240A (en) Data transfer control system
JPS5691554A (en) Data transmitter
JPS57127355A (en) Signal link forming system
JPS6489736A (en) Data transmission system
JPS6454831A (en) System for managing network of packet communication network