JPS54107606A - Communication control system - Google Patents

Communication control system

Info

Publication number
JPS54107606A
JPS54107606A JP1449878A JP1449878A JPS54107606A JP S54107606 A JPS54107606 A JP S54107606A JP 1449878 A JP1449878 A JP 1449878A JP 1449878 A JP1449878 A JP 1449878A JP S54107606 A JPS54107606 A JP S54107606A
Authority
JP
Japan
Prior art keywords
master station
terminal unit
terminal
selective call
mode
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
JP1449878A
Other languages
Japanese (ja)
Inventor
Susumu Kitagaki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1449878A priority Critical patent/JPS54107606A/en
Publication of JPS54107606A publication Critical patent/JPS54107606A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

PURPOSE:To reduce the response time of system and to hold the reliability, by using the question mode and selective call mode together, in the system collecting various information from the terminal unit through the use of radio frequency waves 1. CONSTITUTION:The master station 1 delivers the selective call signal alpha1' in the selective call mode SCM. The terminal units 21 to 2n judge whether they call the terminal unit of themselves or not and deliver the data beta1 to the master station 1 after to seconds. Further, if the transmission from the said terminal unit is absent within a given time, retransmission is made for the number predetermined and further, if the master station can not receive the data, the said terminal unit is memorized. When the call out control by SCM is finished, the selective call by question mode EM is made. In this case, the master station 1 delivers question signal to the terminal units 21 to 2n in the predetermined order and only the terminal having new data responds. The two modes are repeated afterwards.
JP1449878A 1978-02-10 1978-02-10 Communication control system Pending JPS54107606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1449878A JPS54107606A (en) 1978-02-10 1978-02-10 Communication control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1449878A JPS54107606A (en) 1978-02-10 1978-02-10 Communication control system

Publications (1)

Publication Number Publication Date
JPS54107606A true JPS54107606A (en) 1979-08-23

Family

ID=11862715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1449878A Pending JPS54107606A (en) 1978-02-10 1978-02-10 Communication control system

Country Status (1)

Country Link
JP (1) JPS54107606A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0215740A (en) * 1988-07-01 1990-01-19 Nri & Ncc Co Ltd Data collecting system by radio communication
JPH0454038A (en) * 1990-06-21 1992-02-21 Nec Corp Equipment monitor system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0215740A (en) * 1988-07-01 1990-01-19 Nri & Ncc Co Ltd Data collecting system by radio communication
JPH0454038A (en) * 1990-06-21 1992-02-21 Nec Corp Equipment monitor system

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