JPS54126435A - Contention control system - Google Patents
Contention control systemInfo
- Publication number
- JPS54126435A JPS54126435A JP3433078A JP3433078A JPS54126435A JP S54126435 A JPS54126435 A JP S54126435A JP 3433078 A JP3433078 A JP 3433078A JP 3433078 A JP3433078 A JP 3433078A JP S54126435 A JPS54126435 A JP S54126435A
- Authority
- JP
- Japan
- Prior art keywords
- bus
- dce
- bit
- frame
- information
- 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
Links
Landscapes
- Information Transfer Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
PURPOSE: To perform a high-efficiency data transfer by providing a transmission request bit and a use permission bit in the time slot on a bus in the bus-system communication system where communications between multi-drops are performed.
CONSTITUTION: This system is constituted by bus control part BC of a master station, device controller DCE connected to each multi-drop point, down transmission bus 1, and up receiving bus 2. When having transmission data, each DCE sets the bit, which corresponds to the DCE itself, of frame request information REQ to "1" and transmits data to bus 1, and this information is folded at the position of DEC 15 and reaches BC through bus 2. BC selects one of bits which are set to "1". The frame indicated in the figure is transferred repeatedly at regular intervals; and after performing the selective acceptance procesing of received REQ, BC sets only a bit, which is selected as frame use permission bit ACP and corresponds to the DCE, to "1" and outputs permission information to bus 1. DCE detects that the bit corresponding to the DCE itself is set to "1", and transmits next data.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3433078A JPS54126435A (en) | 1978-03-24 | 1978-03-24 | Contention control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3433078A JPS54126435A (en) | 1978-03-24 | 1978-03-24 | Contention control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54126435A true JPS54126435A (en) | 1979-10-01 |
Family
ID=12411132
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3433078A Pending JPS54126435A (en) | 1978-03-24 | 1978-03-24 | Contention control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54126435A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5927644A (en) * | 1982-08-04 | 1984-02-14 | Nippon Telegr & Teleph Corp <Ntt> | Customer station connection control system |
JPS59149445A (en) * | 1983-02-17 | 1984-08-27 | Nec Corp | Control system of multiple access contention |
JPS609245A (en) * | 1983-06-28 | 1985-01-18 | Nippon Telegr & Teleph Corp <Ntt> | Extension transfer system |
JPS6059834A (en) * | 1983-09-12 | 1985-04-06 | Nippon Telegr & Teleph Corp <Ntt> | Communication system |
JPS60237741A (en) * | 1984-05-11 | 1985-11-26 | Fujitsu Ltd | Control system for information transmission contention |
JPS6172448A (en) * | 1984-09-18 | 1986-04-14 | Agency Of Ind Science & Technol | Router for switching network |
JPS62230136A (en) * | 1985-12-11 | 1987-10-08 | Toshiba Corp | Line concentration distribution system |
JPS6450153A (en) * | 1987-08-19 | 1989-02-27 | Nec Corp | Service request system in gpib communication system |
WO1991004623A1 (en) * | 1989-09-19 | 1991-04-04 | Fujitsu Limited | Multiple access system for a communication network |
-
1978
- 1978-03-24 JP JP3433078A patent/JPS54126435A/en active Pending
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5927644A (en) * | 1982-08-04 | 1984-02-14 | Nippon Telegr & Teleph Corp <Ntt> | Customer station connection control system |
JPH0473338B2 (en) * | 1982-08-04 | 1992-11-20 | Nippon Denshin Denwa Kk | |
JPS59149445A (en) * | 1983-02-17 | 1984-08-27 | Nec Corp | Control system of multiple access contention |
JPS609245A (en) * | 1983-06-28 | 1985-01-18 | Nippon Telegr & Teleph Corp <Ntt> | Extension transfer system |
JPH0228938B2 (en) * | 1983-06-28 | 1990-06-27 | Nippon Telegraph & Telephone | |
JPH0344466B2 (en) * | 1983-09-12 | 1991-07-08 | Nippon Telegraph & Telephone | |
JPS6059834A (en) * | 1983-09-12 | 1985-04-06 | Nippon Telegr & Teleph Corp <Ntt> | Communication system |
JPS60237741A (en) * | 1984-05-11 | 1985-11-26 | Fujitsu Ltd | Control system for information transmission contention |
JPS6172448A (en) * | 1984-09-18 | 1986-04-14 | Agency Of Ind Science & Technol | Router for switching network |
JPH0367380B2 (en) * | 1984-09-18 | 1991-10-22 | Kogyo Gijutsuin | |
JPS62230136A (en) * | 1985-12-11 | 1987-10-08 | Toshiba Corp | Line concentration distribution system |
JPH0732394B2 (en) * | 1985-12-11 | 1995-04-10 | 株式会社東芝 | Concentration distribution method |
JPS6450153A (en) * | 1987-08-19 | 1989-02-27 | Nec Corp | Service request system in gpib communication system |
WO1991004623A1 (en) * | 1989-09-19 | 1991-04-04 | Fujitsu Limited | Multiple access system for a communication network |
US5539743A (en) * | 1989-09-19 | 1996-07-23 | Fujitsu Limited | Multiple access system for communication network |
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