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1. 发明专利

JPS6355823B2 失效
公开(公告)号：JPS6355823B2
公开(公告)日：1988-11-04
申请号：JP2629482
申请日：1982-02-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOOYAMA HIDEKI , NOJIMA TOSHIO , OKAMOTO SHIGEHARU , NAGANO KENJI
IPC分类号： H04W16/26 , H04B7/26 , H04W72/04 , H04W84/08

2. 发明专利

JPS5887930A RADIO LINE RELAYING SYSTEM 失效
公开(公告)号：JPS5887930A
公开(公告)日：1983-05-25
申请号：JP18522081
申请日：1981-11-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOOYAMA HIDEKI , NOJIMA TOSHIO , OKAMOTO SHIGEHARU , NAGANO KENJI
IPC分类号： H04B7/26
摘要： PURPOSE:To simplify the constitution of a mobile station, by setting an allocated line via a relay station provided between a fixed base station and the mobile station, in a system where a mobile station (slave station) having a call receives the assignment of one line out of a plurality of radio lines of the fixed base station (master station). CONSTITUTION:A relay station has a transmission/reception circuit 8 for master line, a transmission and reception line 10 for master line control, a transmission and reception circuit 9 for slave line, a transmission and reception circuit 12 for slave line control, and a line connector 18. The relay station receives an individual signal from the slave station in the service area and stores and registers it, and transmits it to a base station, and the signal is registered in a line network of the base station. When a line connection signal to a specific mobile station from the base station is received at the relay station, the relay station where the said mobile station is stored and registered makes a call to the said mobile station and after the line is set with the said mobile station, an incoming response signal is transmitted to the base station for the set of line. In case of a call from the mobile station, after the relay station makes setting of line with the mobile station, the set of line is done with the base station.

3. 发明专利

JPS643099B2 失效
公开(公告)号：JPS643099B2
公开(公告)日：1989-01-19
申请号：JP21269082
申请日：1982-12-06
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAGANO KENJI , NOJIMA TOSHIO
IPC分类号： H04B7/15 , H04B7/155

4. 发明专利

JPS58143641A RADIO CHANNEL SWITCHING SYSTEM 失效
公开(公告)号：JPS58143641A
公开(公告)日：1983-08-26
申请号：JP2629382
申请日：1982-02-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOJIMA TOSHIO , NAGANO KENJI
IPC分类号： H04Q7/22 , H04B7/26
摘要： PURPOSE:To switch a radio channel without providing in equipment to perform the transfer of radio channel information between fixed stations mutually, by providing a deciding function for channel switching and sending function of using channel information to a mobile station. CONSTITUTION:A radio circuit control signal modulator/demodulator circuit 14 detects a discriminating signal out of each prescribed channel in a time division multiplex signal as a mobile station 5 moves from a radio circuit zone 10 to 11. Then a reduction of the level of the signal concerning a repeating device 8 and an increment of the level of the discriminating signal fed from a repeating device 9 are detected and transmitted to a circuit characteristic control circuit 16 via a transmission line 17. When the level increment exceeds a specific level, the circuit 16 decides the execution of channel switching. Thus the device 9 sets radio circuits to a master fixed station and the station 5, and the circuit 16 switches the using channel of an audio signal modulator/ demodulator circuit 15. As a result, the channel is switched to the zone 11 from the zone 10.

5. 发明专利

JPS5817710A SWEEP OSCILLATOR 失效
公开(公告)号：JPS5817710A
公开(公告)日：1983-02-02
申请号：JP11437081
申请日：1981-07-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOJIMA TOSHIO , NAGANO KENJI , OKAMOTO SHIGEHARU
IPC分类号： H03B23/00
摘要： PURPOSE:To supply a frequency with very high accuracy in a short time, by detecting and correcting the error of oscillating frequency at each sweep. CONSTITUTION:An output frequency of a voltage controlled oscillator 1 is converted into a suitable low frequency at a frequency converter 12 with respect to an arbitrary frequency and inputted to a programmable counter 15 with gate circuit 14. The counter 15 counts the number of signal waves during the open time of the gate 14 and outputs the difference with a reference number. This difference is added with control voltage information to the present oscillation frequency stored in a memory 18 and temporarily stored to a latch circuit 17 as the oscillation frequency controlling voltage information at the next sweep. The memory is rewritten with the control voltage information after the correction and waits for the next sweep. The storage in a circuit 17 is coverted into an analog control voltage with a D/A converter 20 to control the oscillation frequency of the oscillator 1.

6. 发明专利

JPS58143644A MOBILE COMMUNICATION SYSTEM 失效
公开(公告)号：JPS58143644A
公开(公告)日：1983-08-26
申请号：JP2629482
申请日：1982-02-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOOYAMA HIDEKI , NOJIMA TOSHIO , OKAMOTO SHIGEHARU , NAGANO KENJI
IPC分类号： H04W16/26 , H04B7/26 , H04W72/04 , H04W84/08
摘要： PURPOSE:To obtain a mobile communication system which can facilitate an easy countermeasure to a dead zone, by providing a channel designating function for a mobile station to a repeater station that is set between a fixed radio base station and the moble station. CONSTITUTION:A mobile station 12 existing in a high field region exchanges first the information for setting of channels with a fixed radio station 1 by means of control channels fOD (down) and fOU (up). Based on the information, channels f1D and f1U, for example, are selected among many channels to perform a call. If the station 13 exists in a weak field region, it is impossible to receive the channel fOD from the station 1. Thus the station 13 switches automatically the channel to prescribed control channels FOD and FOU for weak field region to perform communication to a repeater station 3 for relief of dead zone in a weak filed region. The station 3 puts the control channel information given from the station 1 on the channels FOD and FOU and then converts a channel designating signal to use channels F2D and F2U for calling purpose.

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