JPS5475201A - Radiotelephony unit - Google Patents

Radiotelephony unit

Info

Publication number
JPS5475201A
JPS5475201A JP14305777A JP14305777A JPS5475201A JP S5475201 A JPS5475201 A JP S5475201A JP 14305777 A JP14305777 A JP 14305777A JP 14305777 A JP14305777 A JP 14305777A JP S5475201 A JPS5475201 A JP S5475201A
Authority
JP
Japan
Prior art keywords
electric field
mobile station
alarm sound
circuit
receiving electric
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
JP14305777A
Other languages
Japanese (ja)
Other versions
JPS5620742B2 (en
Inventor
Mamoru Maki
Kiyoyuki Tsujimura
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
NTT Inc
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14305777A priority Critical patent/JPS5475201A/en
Publication of JPS5475201A publication Critical patent/JPS5475201A/en
Publication of JPS5620742B2 publication Critical patent/JPS5620742B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To improve a service quality and a service efficicency by supervising always receiving electric field intensities of the base station and the mobile station and performing a service area outside display. CONSTITUTION:The output of receiving part 9 of base station 1 is supplied to receiving electric field decision circuit 15; and when a receiving electric field below a prescribed level is detected, outside alarm sound generator circuit 17 is started by the output of circuit 15. Then, the modulation of receiving part 8 is performed by this alarm sound and is transmitted together with signals of the exchange from line 3 to mobile station 2. Mobile station 2 supervises the output of receiving part 11 by receiving electric field decision circuit 16 and starts outside alarm sound generator circuit 18 in a receiving electric filed below a prescribed level and communicates the alarm sound to receiver 12 through synthesizer circuit 19. As a result, the mobile station can always confirm the service area.
JP14305777A 1977-11-28 1977-11-28 Radiotelephony unit Granted JPS5475201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14305777A JPS5475201A (en) 1977-11-28 1977-11-28 Radiotelephony unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14305777A JPS5475201A (en) 1977-11-28 1977-11-28 Radiotelephony unit

Publications (2)

Publication Number Publication Date
JPS5475201A true JPS5475201A (en) 1979-06-15
JPS5620742B2 JPS5620742B2 (en) 1981-05-15

Family

ID=15329900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14305777A Granted JPS5475201A (en) 1977-11-28 1977-11-28 Radiotelephony unit

Country Status (1)

Country Link
JP (1) JPS5475201A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199345A (en) * 1981-06-01 1982-12-07 Nec Corp Mobile radio communication system
JPS60182228A (en) * 1984-02-29 1985-09-17 Nippon Telegr & Teleph Corp <Ntt> Radiotelephony equipment
JPS6326157U (en) * 1986-07-31 1988-02-20
JPS63200626A (en) * 1987-02-16 1988-08-18 Toyo Commun Equip Co Ltd Inductive communication system
JPS6451850A (en) * 1987-08-24 1989-02-28 Nippon Telegraph & Telephone Cordless telephone system
JPH0278348A (en) * 1988-06-13 1990-03-19 Toshiba Corp Radio telephone set and its control method
WO1994016530A1 (en) * 1993-01-07 1994-07-21 Northern Telecom Limited Radio link parameter monitoring in a wireless communications system
EP0713316A3 (en) * 1994-11-18 1996-12-18 Canon Kk Wireless communication apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199345A (en) * 1981-06-01 1982-12-07 Nec Corp Mobile radio communication system
JPS60182228A (en) * 1984-02-29 1985-09-17 Nippon Telegr & Teleph Corp <Ntt> Radiotelephony equipment
JPS6326157U (en) * 1986-07-31 1988-02-20
JPS63200626A (en) * 1987-02-16 1988-08-18 Toyo Commun Equip Co Ltd Inductive communication system
JPS6451850A (en) * 1987-08-24 1989-02-28 Nippon Telegraph & Telephone Cordless telephone system
JPH0278348A (en) * 1988-06-13 1990-03-19 Toshiba Corp Radio telephone set and its control method
WO1994016530A1 (en) * 1993-01-07 1994-07-21 Northern Telecom Limited Radio link parameter monitoring in a wireless communications system
EP0713316A3 (en) * 1994-11-18 1996-12-18 Canon Kk Wireless communication apparatus
US5999809A (en) * 1994-11-18 1999-12-07 Canon Kabushiki Kaisha Wireless communication apparatus with distinct alarm signals

Also Published As

Publication number Publication date
JPS5620742B2 (en) 1981-05-15

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