JPS5721140A - Communication system - Google Patents

Communication system

Info

Publication number
JPS5721140A
JPS5721140A JP9634780A JP9634780A JPS5721140A JP S5721140 A JPS5721140 A JP S5721140A JP 9634780 A JP9634780 A JP 9634780A JP 9634780 A JP9634780 A JP 9634780A JP S5721140 A JPS5721140 A JP S5721140A
Authority
JP
Japan
Prior art keywords
priority
terminal
delay circuit
signal delay
value
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
JP9634780A
Other languages
Japanese (ja)
Inventor
Osamu Isaka
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP9634780A priority Critical patent/JPS5721140A/en
Publication of JPS5721140A publication Critical patent/JPS5721140A/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]
    • H04L12/40—Bus networks
    • H04L12/407—Bus networks with decentralised control
    • H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]

Landscapes

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

Abstract

PURPOSE:To achieve the broadcasting cable communication system with decreased frequency produced by collision, by providing priority to the transmission start timing of a plurality of terminals. CONSTITUTION:Data processed at a microcomputer 263 is converted into clocks and data at a transmission section 261 and transmitted to a modulator 21. Each terminal has given priority and the priority expressed with a figure is stored in an RAM in the microcomputer 263. This value is read out from the RAM when the transmission request is produced and transferred to a counter 264 and a signal delay circuit 262. On the other hand, when a carrier detector shows ''absence of carrier'', the signal delay circuit 262 starts the count down of the value set in advance with the clock from the 263. The signal delay circuit of the terminal having the highest priority is at ''0'', the waiting state of the terminal is released, and signals are transmitted from the transmission section 261. Every time when the waiting state is extended once, the value of the counter 264 is smaller, and the priority is increased.
JP9634780A 1980-07-15 1980-07-15 Communication system Pending JPS5721140A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9634780A JPS5721140A (en) 1980-07-15 1980-07-15 Communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9634780A JPS5721140A (en) 1980-07-15 1980-07-15 Communication system

Publications (1)

Publication Number Publication Date
JPS5721140A true JPS5721140A (en) 1982-02-03

Family

ID=14162467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9634780A Pending JPS5721140A (en) 1980-07-15 1980-07-15 Communication system

Country Status (1)

Country Link
JP (1) JPS5721140A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147259A (en) * 1982-02-26 1983-09-02 Nippon Telegr & Teleph Corp <Ntt> Multiaccess system
JPS58161061A (en) * 1982-03-19 1983-09-24 Hitachi Ltd Self-controlling method and device of distributed priority competition
JPS58166848A (en) * 1982-03-11 1983-10-03 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Communication channel managing device
JPS5939116A (en) * 1982-08-20 1984-03-03 ジヨン・フル−ク・マニユフアクチヤリング・カンパニ−・インコ−ポレ−テツド Step responding averaging filter
JPS5987553A (en) * 1982-11-10 1984-05-21 Nippon Telegr & Teleph Corp <Ntt> Confliction controlling system
JPS59111446A (en) * 1982-12-02 1984-06-27 ウエスターン・エレクトリック・カムパニー，インコーポレーテッド Multiplex access digital transmission system
EP0123371A1 (en) * 1983-01-27 1984-10-31 BRITISH TELECOMMUNICATIONS public limited company Multi-processor system
JPS6097752A (en) * 1983-10-19 1985-05-31 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Multiplex access controlling method
JPS6285525A (en) * 1985-10-11 1987-04-20 Nec Corp Control method for transmission right
JPH03158035A (en) * 1989-11-15 1991-07-08 Matsushita Electric Works Ltd Time division multiplex transmission system
JPH04207539A (en) * 1990-11-30 1992-07-29 Honda Motor Co Ltd Communication means
US5218888A (en) * 1989-09-27 1993-06-15 Rotabroach Limited Annular hole cutter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53123601A (en) * 1977-04-04 1978-10-28 Mitsubishi Electric Corp Data transmission system
JPS546403A (en) * 1977-06-17 1979-01-18 Hitachi Denshi Ltd Data transmission equipment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53123601A (en) * 1977-04-04 1978-10-28 Mitsubishi Electric Corp Data transmission system
JPS546403A (en) * 1977-06-17 1979-01-18 Hitachi Denshi Ltd Data transmission equipment

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147259A (en) * 1982-02-26 1983-09-02 Nippon Telegr & Teleph Corp <Ntt> Multiaccess system
JPS58166848A (en) * 1982-03-11 1983-10-03 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Communication channel managing device
JPH037171B2 (en) * 1982-03-11 1991-01-31 Intaanashonaru Bijinesu Mashiinzu Corp
JPS58161061A (en) * 1982-03-19 1983-09-24 Hitachi Ltd Self-controlling method and device of distributed priority competition
JPH0325976B2 (en) * 1982-03-19 1991-04-09 Hitachi Ltd
JPS5939116A (en) * 1982-08-20 1984-03-03 ジヨン・フル−ク・マニユフアクチヤリング・カンパニ−・インコ−ポレ−テツド Step responding averaging filter
JPH0125444B2 (en) * 1982-08-20 1989-05-17 Fluke Mfg Co John
JPS5987553A (en) * 1982-11-10 1984-05-21 Nippon Telegr & Teleph Corp <Ntt> Confliction controlling system
JPS59111446A (en) * 1982-12-02 1984-06-27 ウエスターン・エレクトリック・カムパニー，インコーポレーテッド Multiplex access digital transmission system
EP0123371A1 (en) * 1983-01-27 1984-10-31 BRITISH TELECOMMUNICATIONS public limited company Multi-processor system
JPH0411057B2 (en) * 1983-10-19 1992-02-27
JPS6097752A (en) * 1983-10-19 1985-05-31 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Multiplex access controlling method
JPS6285525A (en) * 1985-10-11 1987-04-20 Nec Corp Control method for transmission right
JPH0453339B2 (en) * 1985-10-11 1992-08-26 Nippon Electric Co
US5218888A (en) * 1989-09-27 1993-06-15 Rotabroach Limited Annular hole cutter
JPH03158035A (en) * 1989-11-15 1991-07-08 Matsushita Electric Works Ltd Time division multiplex transmission system
JPH0752882B2 (en) * 1989-11-15 1995-06-05 松下電工株式会社 Time division multiplex transmission system
JPH04207539A (en) * 1990-11-30 1992-07-29 Honda Motor Co Ltd Communication means

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