JPS5623053A - Communication system of loop shape - Google Patents

Communication system of loop shape

Info

Publication number
JPS5623053A
JPS5623053A JP9731879A JP9731879A JPS5623053A JP S5623053 A JPS5623053 A JP S5623053A JP 9731879 A JP9731879 A JP 9731879A JP 9731879 A JP9731879 A JP 9731879A JP S5623053 A JPS5623053 A JP S5623053A
Authority
JP
Japan
Prior art keywords
signal
frame
transmission
bit pattern
bit
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
JP9731879A
Other languages
Japanese (ja)
Inventor
Yasuo Kaminaga
Kanman Hamada
Shigeru Matsuo
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9731879A priority Critical patent/JPS5623053A/en
Publication of JPS5623053A publication Critical patent/JPS5623053A/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
    • H04L12/437—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 prevent the system down, by avoiding the disturbance of transmission right management due to one-bit error such as noise, by adding the line vacant signal to the signal normally used for transmission. CONSTITUTION:When FLAG in which the station ST1 is the line vacant signal GA' and the frame out signal IDLE' (bit pattern 0111...) are together transmitted, the station ST2 having the transmission request converts the 8th bit of the signal IDLE' in the signal GA' into 0 to transmit the data frame check code FCS of frame and the transmission frame (a) toward down-stream. Further, if the frame (a) is received at the reception station STn, the response frame b is fed to ST2 and STn gives the transmission right to other STs. Moreover, the signal GA' is made into the bit pattern connecting and adding the signal IDLE (bit pattern 01111111...) to the signal FLAG (bit pattern 01111110), to avoid the disturbance of the management of transmission right due to one bit error.
JP9731879A 1979-08-01 1979-08-01 Communication system of loop shape Pending JPS5623053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9731879A JPS5623053A (en) 1979-08-01 1979-08-01 Communication system of loop shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9731879A JPS5623053A (en) 1979-08-01 1979-08-01 Communication system of loop shape

Publications (1)

Publication Number Publication Date
JPS5623053A true JPS5623053A (en) 1981-03-04

Family

ID=14189127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9731879A Pending JPS5623053A (en) 1979-08-01 1979-08-01 Communication system of loop shape

Country Status (1)

Country Link
JP (1) JPS5623053A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58152932A (en) * 1982-02-23 1983-09-10 ユニ・カルダン・アクチエンゲゼルシヤフト Shaft bearing which can freely be moved angularly
JPS59101948A (en) * 1982-12-02 1984-06-12 Fujitsu Ltd Frame transmission controlling system
JPS6014551A (en) * 1983-07-05 1985-01-25 Nec Corp Data transmission system
JPS61192929A (en) * 1985-02-22 1986-08-27 ジーケーエヌ・オートモーテイブ・コンポーネンツ・インコーポレーテツド Constant velocity universal joint transmitting driving torque
JPS61228123A (en) * 1985-02-22 1986-10-11 ジ−ケ−エヌ・オ−トモ−テイブ・コンポ−ネンツ・インコ−ポレ−テツド Power transmission mechanical joint

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58152932A (en) * 1982-02-23 1983-09-10 ユニ・カルダン・アクチエンゲゼルシヤフト Shaft bearing which can freely be moved angularly
JPS59101948A (en) * 1982-12-02 1984-06-12 Fujitsu Ltd Frame transmission controlling system
JPH0131818B2 (en) * 1982-12-02 1989-06-28 Fujitsu Ltd
JPS6014551A (en) * 1983-07-05 1985-01-25 Nec Corp Data transmission system
JPH0514455B2 (en) * 1983-07-05 1993-02-25 Nippon Electric Co
JPS61192929A (en) * 1985-02-22 1986-08-27 ジーケーエヌ・オートモーテイブ・コンポーネンツ・インコーポレーテツド Constant velocity universal joint transmitting driving torque
JPS61228123A (en) * 1985-02-22 1986-10-11 ジ−ケ−エヌ・オ−トモ−テイブ・コンポ−ネンツ・インコ−ポレ−テツド Power transmission mechanical joint

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