JPS5579549A - Bus controller - Google Patents

Bus controller

Info

Publication number
JPS5579549A
JPS5579549A JP15384878A JP15384878A JPS5579549A JP S5579549 A JPS5579549 A JP S5579549A JP 15384878 A JP15384878 A JP 15384878A JP 15384878 A JP15384878 A JP 15384878A JP S5579549 A JPS5579549 A JP S5579549A
Authority
JP
Japan
Prior art keywords
station
order
stations
transmission request
transmission
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
JP15384878A
Other languages
Japanese (ja)
Inventor
Tachiki Ichihashi
Takane Kakuno
Shigeo Nakatsuka
Mitsuhiro Ishizaka
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 JP15384878A priority Critical patent/JPS5579549A/en
Publication of JPS5579549A publication Critical patent/JPS5579549A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/36—Handling requests for interconnection or transfer for access to common bus or bus system

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Bus Control (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To exercise priority control by a simple constitution by obtaining inter- station insulation by controlling the transmission right of a data bus composed of optical fiber and star-shaped coupler by making a connection between stations by the optical fiber and photo branch unit. CONSTITUTION:To control the transmission right of a data bus composd of optical fibers 31a, 31b, 31c, etc., and star coupler 30, high-order, middle-order and low- order stations 25a, 25b and 25c are connected on a slave basis by optical fibers 31a, 31b and 31c, and photo branch units 1a, 1b and 1c, providing the transfer of the transmission request of high-order station 25a to low-order stations 25b and 25c. When there is no transmission request to station 25a, the transmission request to its own station 25b is transferred to station 25c to inhibit data communication with station 25c, thereby obtaining the transmission right. Consequently, high inter-station insulation can be obtained, and the simple structure can exercise priority control.
JP15384878A 1978-12-13 1978-12-13 Bus controller Pending JPS5579549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15384878A JPS5579549A (en) 1978-12-13 1978-12-13 Bus controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15384878A JPS5579549A (en) 1978-12-13 1978-12-13 Bus controller

Publications (1)

Publication Number Publication Date
JPS5579549A true JPS5579549A (en) 1980-06-16

Family

ID=15571414

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15384878A Pending JPS5579549A (en) 1978-12-13 1978-12-13 Bus controller

Country Status (1)

Country Link
JP (1) JPS5579549A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885653A (en) * 1981-11-17 1983-05-23 Nippon Telegr & Teleph Corp <Ntt> Packet collision node position discriminating system in local network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885653A (en) * 1981-11-17 1983-05-23 Nippon Telegr & Teleph Corp <Ntt> Packet collision node position discriminating system in local network

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