JPS54126401A - Mobile radio selective calling system - Google Patents

Mobile radio selective calling system

Info

Publication number
JPS54126401A
JPS54126401A JP3431578A JP3431578A JPS54126401A JP S54126401 A JPS54126401 A JP S54126401A JP 3431578 A JP3431578 A JP 3431578A JP 3431578 A JP3431578 A JP 3431578A JP S54126401 A JPS54126401 A JP S54126401A
Authority
JP
Japan
Prior art keywords
sound
signals
filter
shared
group
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
JP3431578A
Other languages
Japanese (ja)
Inventor
Tadashi Sugiura
Yukiyasu Maejima
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 JP3431578A priority Critical patent/JPS54126401A/en
Publication of JPS54126401A publication Critical patent/JPS54126401A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies

Abstract

PURPOSE:To utilize effectively radio waves by giving frequencies of a filter to each group one by one and using only sound and ringing tone to the group itself as sound and making communication possible without mutual influences in case that the same radio frequency is shared. CONSTITUTION:A base station has circuits 3 and 4 which generate selective calling signals and sound signals respectively, and transmits them by circuit 16 which generates tone squelch signals while superposing them to selective signals and sound signals. Meanwhile, a mobile radio station converts receiving signals to a DC voltage through tone squelch filter 14 by rectifier 15, and transmits the voltage to receiver 12 and filter 8. Then, in case that the same radio frequency is shared, frequencies of filter 14 are given to each group one by one, and only sound and ringing tone for the group itself is used as sound. As a result, communication is possible without mutual influences even if the same radio frequency is shared with plural groups, and radio waves can be utilized effectively.
JP3431578A 1978-03-24 1978-03-24 Mobile radio selective calling system Pending JPS54126401A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3431578A JPS54126401A (en) 1978-03-24 1978-03-24 Mobile radio selective calling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3431578A JPS54126401A (en) 1978-03-24 1978-03-24 Mobile radio selective calling system

Publications (1)

Publication Number Publication Date
JPS54126401A true JPS54126401A (en) 1979-10-01

Family

ID=12410720

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3431578A Pending JPS54126401A (en) 1978-03-24 1978-03-24 Mobile radio selective calling system

Country Status (1)

Country Link
JP (1) JPS54126401A (en)

Similar Documents

Publication Publication Date Title
JPS54126401A (en) Mobile radio selective calling system
FR2347839A1 (en) Duplex mode radio telephone system - employs variable switching delay dependent on signal quality for retransmission of signal
MY107588A (en) Apparatus for and methods transmitting a signal responsive to a received signal
JPS5246709A (en) Signal receiving equipment
SE8903680L (en) PROCEDURE TO CLASSIFY A FRAMEWORK STRUCTURE IN A MOBILE STATION
JPS5413714A (en) Multi-frequency signal reception system
JPS5773539A (en) Mobile radio communication system
JPS5294712A (en) Receiver
JPS5673936A (en) S/n monitor
JPS5411606A (en) Radio communication system
JPS5398703A (en) S/n signal monitoring system
JPS5419303A (en) Transmission and reception system of signal
JPS57202198A (en) Portable stereo audio equipment
JPS51150202A (en) Fm receiver
JPS5483710A (en) Radio repeating system
JPS5791067A (en) Data transmission and reception device
JPS55143864A (en) Remote test system
JPS51112210A (en) Mobile communication equipment
JPS5247206A (en) Communicating and repeating system for moving bodies
JPS545318A (en) Rejection system of interferring distortion caused in demodulation signal due to interference between fm signals
JPS5563143A (en) Repeating system for radio telephone circuit
JPS5224427A (en) Frequency converter circuit
JPS5386501A (en) Calling system for mobile object communication
JPS51112211A (en) Mobile communication equipment
JPS5333514A (en) Radio receiver