JPS55136747A - Data highway central control unit - Google Patents

Data highway central control unit

Info

Publication number
JPS55136747A
JPS55136747A JP4466779A JP4466779A JPS55136747A JP S55136747 A JPS55136747 A JP S55136747A JP 4466779 A JP4466779 A JP 4466779A JP 4466779 A JP4466779 A JP 4466779A JP S55136747 A JPS55136747 A JP S55136747A
Authority
JP
Japan
Prior art keywords
frame
loop
frames
vacant
control
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
JP4466779A
Other languages
Japanese (ja)
Other versions
JPH0143501B2 (en
Inventor
Hajime Konohi
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
Original Assignee
NEC 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 Electric Co Ltd filed Critical NEC Corp
Priority to JP4466779A priority Critical patent/JPS55136747A/en
Publication of JPS55136747A publication Critical patent/JPS55136747A/en
Publication of JPH0143501B2 publication Critical patent/JPH0143501B2/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]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Landscapes

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

Abstract

PURPOSE:To remove the frame unknown for the address, by setting the number of terminal stations (n) on the loop, discriminating the absence of vacant frame in (n+1) frames, and making vacant all the (n+1) frames on the loop. CONSTITUTION:The signal input from the loop transmission line is received at the code conversion circuit 2, APC circuit 4 and data reproduction circuit 3, and loop control is made at the loop control circuit 5. While the control, the vacancy of the frame is discriminated to count the number of frames not vacant. Taking the number of terminal stations on the loop as (n), if no vacant frame is present in the (n+1) frames, one frame is at least the frame unknown to the address and control is made that the (n+1) frame are all vacant frames from the time. Thus, the frame unknown to the address can be removed from the loop.
JP4466779A 1979-04-12 1979-04-12 Data highway central control unit Granted JPS55136747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4466779A JPS55136747A (en) 1979-04-12 1979-04-12 Data highway central control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4466779A JPS55136747A (en) 1979-04-12 1979-04-12 Data highway central control unit

Publications (2)

Publication Number Publication Date
JPS55136747A true JPS55136747A (en) 1980-10-24
JPH0143501B2 JPH0143501B2 (en) 1989-09-21

Family

ID=12697791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4466779A Granted JPS55136747A (en) 1979-04-12 1979-04-12 Data highway central control unit

Country Status (1)

Country Link
JP (1) JPS55136747A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03109525A (en) * 1990-08-30 1991-05-09 Seiko Epson Corp Image display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03109525A (en) * 1990-08-30 1991-05-09 Seiko Epson Corp Image display device
JP2586195B2 (en) * 1990-08-30 1997-02-26 セイコーエプソン株式会社 Liquid crystal display

Also Published As

Publication number Publication date
JPH0143501B2 (en) 1989-09-21

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