JPS5662440A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS5662440A
JPS5662440A JP13872279A JP13872279A JPS5662440A JP S5662440 A JPS5662440 A JP S5662440A JP 13872279 A JP13872279 A JP 13872279A JP 13872279 A JP13872279 A JP 13872279A JP S5662440 A JPS5662440 A JP S5662440A
Authority
JP
Japan
Prior art keywords
field
transmission
type
reception
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.)
Granted
Application number
JP13872279A
Other languages
Japanese (ja)
Other versions
JPS6355259B2 (en
Inventor
Yoshio Hamaguchi
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 JP13872279A priority Critical patent/JPS5662440A/en
Publication of JPS5662440A publication Critical patent/JPS5662440A/en
Publication of JPS6355259B2 publication Critical patent/JPS6355259B2/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

Landscapes

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

Abstract

PURPOSE:To reduce the number of bits to identify transmission and reception parties, by giving a transmission direction designation bit which indicates whether transmission is made from the 1st type to the 2nd type device or reverse, to each frame. CONSTITUTION:The 1st type devices 2, 3 and the 2nd type devices 4, 5...6 are connected to a loop line 1. The transmission frame consists of a synchronizing field 101, vacant frame identifying field B102, transmission direction designation field D103, information transmission or reception device identifying field M104 and field S105, information field 106, and inspection field 107. If the direction of information transmission is from the 1st to the 2nd type devices, the field D103 is ''1'' and if it is reverse, then it is at ''0''. Thus, the direction of transmission and reception is identified by giving ''1'' or ''0'' for the direction of information transmission to the field M or S and ''0000'' or ''1111'' according to the corresponding device.
JP13872279A 1979-10-29 1979-10-29 Data transmission system Granted JPS5662440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13872279A JPS5662440A (en) 1979-10-29 1979-10-29 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13872279A JPS5662440A (en) 1979-10-29 1979-10-29 Data transmission system

Publications (2)

Publication Number Publication Date
JPS5662440A true JPS5662440A (en) 1981-05-28
JPS6355259B2 JPS6355259B2 (en) 1988-11-01

Family

ID=15228608

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13872279A Granted JPS5662440A (en) 1979-10-29 1979-10-29 Data transmission system

Country Status (1)

Country Link
JP (1) JPS5662440A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0399542A (en) * 1989-09-13 1991-04-24 Fujitsu Ltd Inter-terminal data transmission system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336405A (en) * 1976-09-16 1978-04-04 Fujitsu Ltd Loop transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336405A (en) * 1976-09-16 1978-04-04 Fujitsu Ltd Loop transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0399542A (en) * 1989-09-13 1991-04-24 Fujitsu Ltd Inter-terminal data transmission system

Also Published As

Publication number Publication date
JPS6355259B2 (en) 1988-11-01

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