JPH0993636A - Radio selective calling device, radio selective calling system, and data transfer system - Google Patents

Abstract

(57) Abstract: A wireless selective calling device that realizes wireless communication of internally held and stored data with a simple configuration. In this radio call selection device, a receiving unit (2
1 to 27) are configured by the DCR method, and a local oscillation signal generation unit (28 to 3) configured by a PLL frequency synthesizer is used.
2) can be modulated. C
Upon receiving the data transfer command, the PU 34 reads out data such as a received message held in the ROM 33, encodes the data, and adds the data to the modulation input terminal of the VCO 31 via the modulator 35. As a result, the local oscillation signal is modulated by the transfer data, radiated into the air by the multiplication processing of the multiplier 32, and transmitted outside the radio selective calling device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective calling apparatus which receives an information signal wirelessly transmitted from a base station, compares it with its own ID, and when the information signals match, notifies the reception and presents the information. And a wireless selective calling system and a data transfer system using the wireless selective calling device.

[0002]

2. Description of the Related Art In a conventional device of this type, a radio circuit is dedicated to reception, and for reading data stored therein (for example, a received message or an internal setting mode), it is shown in FIG. It was done with such a configuration. In FIG. 17, 11 is a radio selective calling device, and 12 is a ROM.
An external storage device such as a writer.

The radio selective calling device 11 is an RO that stores data such as received messages and internal setting modes.
An M (read-only memory) 111, a CPU (central processing unit) 112 for performing various controls inside the device, and reading arbitrary data from the ROM 111, and a CPU 11
An external connection interface (I / F) circuit 113 for sending the data read out through the external device 2 is provided.

A line C for data communication between the external connection interface circuit 113 of the wireless selective calling device 11 and the external storage device 12 is different from a wired system using a connector as an interface or a base station calling wave such as infrared rays. It uses a wireless system.

However, in the case of wired communication,
To expose the connector, it is necessary to open the lid of the device. In addition, even if another wireless system such as infrared rays is used, not only a dedicated circuit is required in the equipment, but infrared rays can communicate between the closely attached equipment, but some degree of remote communication with the base station system is possible. It was difficult to transfer one-to-many data.

[0006]

As described above, in the conventional radio call selection device, there is provided a system for reading / writing the internally held and stored data through the wired system via the connector or the wireless system utilizing infrared rays or the like. Because,
Remote communication with the base station system and one-to-many communication between devices have been difficult.

An object of the present invention is to solve the above problems and to provide a wireless selective calling device which realizes wireless communication of internally held and stored data with a simple structure, and further used by this device to remotely connect to a base station system. An object of the present invention is to provide a wireless selective calling system that enables bidirectional communication and a data transfer system that enables one-to-many communication between devices.

[0008]

In order to solve the above-mentioned problems, the present invention is as follows. (1) A signal wave transmitted from a base station is received, compared with its own ID, and if they match, the signal is received. In a radio selective calling device in which the local oscillation circuit of the receiving unit is a PLL frequency synthesizer, the local oscillation signal is provided by the modulation signal provided to the local oscillation circuit and supplied to the modulation input terminal. A modulation means for modulating the, and the storage data inside the device is encoded in accordance with a transfer command from the outside of the device and supplied to the modulation input terminal of the local oscillation circuit,
Data transfer processing means for modulating the local oscillation signal with encoded data, and wireless transmission means for outputting the local oscillation signal modulated with the encoded data by this means to the outside of the device as a radio frequency signal are configured. It

In this structure, when a transfer command is given,
The data stored in the device is encoded and supplied to the modulation input terminal of the local oscillation circuit, and the local oscillation signal is modulated by the encoded data (transfer data) and sent to the outside. Transfer is possible.

(2) In the configurations of (1), the wireless transmission means can utilize the leakage of the local oscillation signal. (3) In the configuration of (1), the wireless transmission means includes an amplifier for amplifying the local oscillation signal, and the output of this amplifier is radiated from the antenna of the reception section. According to this configuration, it is possible to transmit with higher power.

In the configurations (4) and (3), the wireless transmission means has a function of controlling the power supply of the amplifier to an ON state only during data transfer. According to this configuration, it is possible to eliminate the leakage of the local oscillation signal except when transferring data.

(5) In the configuration of (1), the wireless transmission means includes a switch that supplies the local oscillation signal to the antenna of the reception section only during data transfer. Also with this configuration, it is possible to transmit with a larger power.

(6) In the configuration of (1), the radio transmitting means has a function of adjusting the antenna tuning circuit of the receiving section to the frequency of the local oscillation signal at the time of data transfer. With this configuration, the radiation efficiency of the local oscillation signal can be improved.

(7) In the configuration of (1), the wireless transmission means includes a transmission level switching means for switching the transmission level of the local oscillation signal according to the reception level of the reception section.

According to this structure, the transmission distance is judged from the reception level, and the transmission level is switched according to the judgment result, so that the transmission efficiency can be improved. (8) In the configuration of (7), the transmission level switching unit selects a plurality of routes for supplying the local oscillation signal to the antenna of the receiving unit with different gains, and these routes according to the reception level. It can be realized by including a switch for switching.

(9) In the configuration of (1), when the receiving section is a direct conversion receiving system, the data transfer processing means modulates a local oscillation signal for quadrature detection.

(10) In the configuration of (1), when the receiving unit is a double superheterodyne receiving system, the data transfer processing means modulates the first local oscillation signal. (11) By wirelessly transmitting a call signal transmitted from the base station management station from a plurality of base stations in different areas, a radio selective call device in any area can receive the call signal by radio. In the calling system,
By using the device having the configuration (1) as the wireless selective calling device, the local oscillation signal is wirelessly transmitted when the calling signal is received, and the base station managing the area receives the local oscillation signal and manages the base station. The feature is that it is sent to the station.

With this configuration, a response (answer back) is obtained from the radio selective calling device as the base station system, and bidirectional communication is possible between the base station system and the radio selective calling device.

(12) A plurality of radio selective calling devices having the configuration of (1) are provided, one of which transmits a local oscillation signal modulated by stored data in the device, and the other of which receives the transmission output thereof to mutually communicate. It is characterized by performing data transfer. With this configuration, data can be transferred from one device to a plurality of devices at the same time.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to FIGS. FIG. 1 shows a configuration as a first embodiment of the present invention when it is applied to a radio call selection device by a direct conversion receiving system.

In FIG. 1, a signal wave from a base station (not shown) captured by the antenna 21 is amplified by the high frequency amplifier 22 and supplied to the mixers 231 and 232, which are + π / 4 phase shifter 26, respectively. The quadrature detection is performed by mixing with the local oscillation signals (90 ° out of phase with each other) phase-shifted by the −π / 4 phase shifter 27. The detection outputs of the mixers 231 and 232 are band-limited by the filters 241 and 242, supplied to the direct conversion (DCR) detector 25, and are detected and output by the DCR method.

On the other hand, the reference oscillating circuit 28 generates a frequency signal specific to the device as a reference signal. This reference frequency signal is sent to the voltage comparator (VC) 29 by the phase comparator (PC) 29.
(O) 31 is phase-compared with the oscillating output from O 31, and is supplied to the VCO 31 as a voltage control signal corresponding to the phase error by the loop filter 30. This makes VCO31
The oscillator output is locked to the reference frequency signal.

The frequency signal output from the VCO 31 is multiplied by the multiplier (MLT) 32, and the + .pi. / 4 phase shifter 26, -.pi./4 phase shifter 27 as a local oscillation signal.
Is supplied to.

Further, this apparatus is provided with a ROM 33 as a storage circuit for storing data such as received messages and internal setting modes. Further, the CPU 34 performs various controls inside the apparatus, reads out arbitrary data from the ROM 33 in response to an external output command, and outputs the encoded data.
And a modulator (MO that modulates the encoded data output from the CPU 34 and supplies the modulated data to the modulation input terminal of the VCO 31).
D) 35.

The VCO 31 has a function of modulating the oscillation output by increasing or decreasing the oscillation frequency according to the modulation signal supplied to the modulation input terminal. The modulation output of the VCO 31 is multiplied by the MLT 32 and directly radiated into the air as the data transfer output a.

That is, in the radio call selecting device having the above-mentioned configuration, the receiving section (21 to 27) is constituted by the DCR system, and the local oscillation signal generating section (28 to 32) constituted by the PLL frequency synthesizer is modulated. You can do it.

When the CPU 34 receives the data transfer command, the CPU 34 reads the data such as the received message stored in the ROM 33, encodes the data, and the VCO via the MOD 35.
Add to 31 modulation input terminals. As a result, the local oscillation signal is modulated by the transfer data, radiated into the air by the multiplication processing of the multiplier 32, and transmitted outside the radio selective calling device.

Therefore, according to the above configuration, the wireless communication of the internally stored data can be performed very easily without adding a new transmission circuit. In the above embodiment, the VCO 31 is modulated at the time of data transfer, so that the detection processing of the receiving system becomes impossible. Therefore, the modulation function of the VCO 31 operates only during data transfer,
It is desirable that the device does not operate when it is in the receiving state.

Further, in the above embodiment, the memory circuit is not limited to the ROM 33, and may be a RAM or other memory element. FIG. 2 shows another configuration as a second embodiment of the present invention when it is applied to a radio call selection device by a direct conversion receiving system. In FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals, and a duplicate description will be omitted here.

In this embodiment, the amplifier 3 for local oscillation output is used.
6, the transfer data carried on the local oscillation signal by the modulation process of the VCO 31 is transmitted to the amplifier 36 via the MLT 32.
It is characterized in that it is amplified by and is transmitted from the antenna 21 to the air.

According to this structure, since the local oscillation output is supplied to the antenna 21 via the amplifier 36, it is possible to perform communication with a carrier wave having a larger electric power as compared with the first embodiment. It is desirable that the power supply of the amplifier 36 be controlled by the CPU 34 because it is not desirable that the local oscillation output leaks to the outside when communication is not performed.

FIG. 3 shows, as a third embodiment of the present invention, another configuration in the case of being applied to a radio call selecting device by a direct conversion receiving system. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals, and the duplicated description will be omitted here.

In this embodiment, a transmission / reception changeover switch 37 is provided, and normally the antenna 21 is connected to the high frequency amplifier 22,
At the time of data transfer, the antenna 21 is connected to the output end of the MLT 32 so that the local oscillation signal output from the MLT 32 is supplied to the antenna 21.

According to this configuration, the local oscillation output is supplied to the antenna 21 via the switch 37, so that the configuration shown in FIG.
Compared with the first embodiment shown in FIG. 5, communication can be performed with a carrier wave of large power.

In the above embodiment, the transmission / reception changeover switch 3
However, as an example of the configuration around the switch, as shown in FIG. 4, an on / off switch 38 is used to connect the output end of the MLT 32 to the antenna 21 when performing communication. You may

Also in these examples, when communication is not performed, the local oscillation output is prevented from being supplied to the antenna 21 by the switch 37 or 38 to prevent leakage of the local oscillation output. This switch switching may be electronic control from the CPU 34, or mechanical control linked to the operation of an external switch (not shown) of the calling device.

FIG. 5 shows the configuration of a fourth embodiment of the present invention when it is applied to a radio paging selection device by a double superheterodyne reception system. Incidentally, FIG.
In FIG. 1, the same parts as those in FIG.
Here, duplicate description is omitted.

In FIG. 5, the signal wave from the base station captured by the antenna 21 is amplified by the high frequency amplifier 22, and then the unnecessary wave component is removed by the high frequency filter 41.
The first mixer 42 mixes the first local oscillation signal and converts it into a first intermediate frequency signal. The first intermediate frequency filter 43 removes harmonic components from this signal, and the second mixer 44 mixes it with the second local oscillation signal from the second local oscillation circuit 45 to convert it into a second intermediate frequency signal. The second intermediate frequency filter 46 removes the higher harmonic component from the signal again, and the second intermediate frequency amplifier 47 amplifies the higher harmonic component to obtain the quadrature detector 4.
The detection output is made at 8.

On the other hand, as the circuit for generating the first local oscillation signal, the reference oscillation circuit 28 and the phase comparator (P
C) 29, loop filter 30, voltage controlled oscillator (VC
O) 31 and a multiplier (MLT) 32, and the output of the multiplier 32 is the first mixer 4 as the first local oscillation signal.
Sent to 2.

This device also includes the ROM 33, C described above.
By including the PU 34 and the modulator (MOD) 35, the read data of the ROM 33 is encoded by the CPU 34, modulated by the modulator 35 and supplied to the modulation input terminal of the VCO 31, the first local oscillation signal can be modulated by the transfer data. It is like this.

That is, the present embodiment realizes the first embodiment shown in FIG. 1 by the double superhetrodyne reception system. When the CPU 34 receives the data transfer command, it reads the data of the received message and the like held in the ROM 33, encodes it, and applies it to the modulation input terminal of the VCO 31 via the MOD 35. As a result, VC
Since the oscillation output of O31 is modulated by the transfer data,
The first local oscillation signal a output from the multiplier 32 is directly radiated into the air as a data transfer output and is transmitted to the outside of the radio selective calling device.

Therefore, according to the above configuration, the wireless communication of the internally stored data can be performed very easily without adding a new transmission circuit. FIG. 6 shows another configuration as a fifth embodiment of the present invention when it is applied to a radio paging selection device based on the double superheterodyne reception system. In FIG. 6, the same parts as those in FIGS. 2 and 5 are designated by the same reference numerals, and the duplicated description will be omitted here.

This embodiment is an implementation of the second embodiment shown in FIG. 2 by a double superheterodyne reception system, and is provided with an amplifier 36 for the first local oscillation output in addition to the configuration shown in FIG. . The amplifier 36 is controlled to be turned off by a control signal from the CPU 33 except when data is being transferred.

That is, according to this configuration, the VCO 31
The transfer data carried on the local oscillation signal by the modulation process of No. 1 is amplified by the amplifier 36 via the MLT 32 and sent out to the air from the antenna 21. Therefore, as compared with the fourth embodiment, a carrier wave of larger power is used. Can communicate.

However, this embodiment differs from the second embodiment shown in FIG. 2 in that the first local oscillation output frequency differs from the reception frequency by the first intermediate frequency. Therefore, if the receiving antenna 21 directly radiates the first local oscillation output, the radiation efficiency is poor.

Therefore, as shown in FIG.
The tuning circuit 49 is controlled by the CPU 34, and when the first local oscillation output is radiated by the antenna 21, the antenna tuning frequency is adjusted to the local oscillation output frequency. Thereby, the radiation efficiency of the transfer data can be improved.

FIG. 8 shows, as a sixth embodiment of the present invention, another configuration when applied to a radio paging selection apparatus by the double superheterodyne reception system. still,
In FIG. 8, the same parts as those in FIGS. 3 and 5 are designated by the same reference numerals, and a duplicate description will be omitted here.

This embodiment is an implementation of the third embodiment shown in FIG. 3 by the double superheterodyne reception system. In addition to the configuration shown in FIG.
Is provided. The transmission / reception changeover switch 37 is normally connected to the high frequency amplifier 22 with the antenna 21 and is connected to the output end of the MLT 32 during data transfer.

According to this structure, the first local oscillation signal output from the MLT 32 is supplied to the antenna 21. Therefore, compared to the fourth embodiment shown in FIG. Can communicate.

In the above embodiment, the switch circuit shown in FIG. 4 can be applied in the same manner as in the third embodiment of FIG. 3, and the antenna tuning switching circuit of FIG. 7 can be applied in FIG. This is similar to the fifth embodiment.

By the way, in the configuration of the above embodiment, since the data transfer output is invariable with respect to the external input of the apparatus, the data transfer cannot be performed with the optimum power.
For example, when the external input is sufficiently large, the data transfer destination is close, such as the base station system, so that the required transmission power is low. In addition, since it is not possible to transfer at frequencies other than the output frequency of the local oscillation circuit during the receiving operation, it is not possible to transfer at any frequency (channel). Further, since the antenna tuning circuit does not follow the output frequency of the local oscillation circuit, when the output frequency and the reception frequency are different, the power supplied to the antenna cannot be effectively transmitted.

Therefore, the present invention solves this problem further, the output level of the local oscillation circuit can be changed according to the external input, the output frequency can be changed freely, and the antenna tuning can follow the output frequency. A wireless selective calling device is provided.

That is, the radio selective calling apparatus according to the present invention which solves the above problems, modulates a local oscillation circuit,
In the method of reading and transferring the stored data using this output wave, the data transfer output level is controlled by the signal output according to the input signal (input level, received message, etc.) of the receiving section, and local oscillation is also performed. The output frequency of the circuit is made variable when data is transferred, and the antenna is tuned to tune to this frequency at the same time.

According to this structure, the data transfer output level, the output frequency of the local oscillation circuit, and the antenna tuning frequency can be varied, so that the electric power can be effectively used and another frequency (channel) other than the reception frequency (channel) can be used. It is possible to transfer data in.

Hereinafter, the case where the present invention is applied to some of the above-described embodiments will be described as the embodiment. FIG.
As a seventh embodiment of the present invention, a configuration of a radio selective calling device by a direct conversion receiving system, which is a development of the second embodiment shown in FIG. 2 and has a data transfer level switching function, is provided. It is shown. still,
9, the same parts as those of FIG. 2 are designated by the same reference numerals, and the duplicated description will be omitted here.

In this embodiment, the local oscillation signal output from the MLT 32 is transmitted to the antenna 21 via the amplifier 36 described above.
To the antenna 2 directly without passing through the amplifier 36
1 and the route to be sent to the R 1 output from the DCR detector 25.
A switch 51 is selectively provided according to the SSI signal, and an antenna tuning circuit 52 for adjusting the antenna tuning frequency to the frequency of the local oscillation signal at the time of data transfer in response to a command from the CPU 34.

As mentioned above, the receiver of this device is a DCR.
The local oscillation circuit unit, which is composed of a PLL frequency synthesizer, is modulated. R
The data such as the received message held in the OM 33 is encoded by the CPU 34 and is applied to the modulation input terminal of the VCO 31 via the modulator 35 when reading.
The modulated local oscillation output is applied to the switch 51 controlled by the RSSI signal output from the DCR detector 25 according to the level of the received input signal.

When the received input signal is sufficiently large, it is considered that the base station system of the data transfer destination is near, so the local oscillation output applied to the switch 51 is supplied to the antenna without being amplified. It On the other hand, when the input level of the input signal is low, it is considered that the data transfer needs to be performed by the carrier wave of higher power, and the switch 51 is switched to the amplifier 36 side.

The amplifier 36 is C when the switch 51 is not on the amplifier side and when data transfer is not performed.
Power is not supplied under the control of the PU 34. The frequency of the local oscillation output at the time of data transfer is controlled by the channel data sent from the CPU 34 to the phase comparator 29,
At the same time, the electronically controlled antenna tuning circuit 552 is also controlled so that the antenna 21 tunes to this frequency.

Therefore, according to the above configuration, it is possible to transfer data in a channel other than the receiving channel, and the radiation efficiency does not deteriorate. The modulated signal (transfer data) supplied to the antenna as described above is transmitted to the outside of the radio selective calling device.

FIG. 10 shows an eighth embodiment of the present invention.
2 shows a configuration of a radio selective calling device by a direct conversion receiving system, which is obtained by developing a combination of the second and third embodiments shown in FIGS. 2 and 3 and further has a data transfer level switching function. Is. still,
10, the same parts as those in FIGS. 2, 3 and 9 are designated by the same reference numerals, and the duplicated description is omitted here.

In this embodiment, an amplifier 53 is further added in front of the switch 51, and when the switch 51 is connected to the amplifier 36 side, a two-stage amplifier configuration is formed, and when it is connected to the opposite side. Has a single-stage amplifier configuration.

According to this configuration, data transfer can be performed with a carrier wave having a larger power than that of the seventh embodiment shown in FIG. In the above configuration, the amplifier 53
When the data transfer is not performed, the power is not supplied under the control of the CPU 34.

FIG. 11 shows a ninth embodiment of the present invention.
11 shows a configuration of a radio selective calling device by a direct conversion receiving system, which is a modification of the eighth embodiment shown in FIG. 10. In FIG. 11, the same parts as those in FIG. 10 are designated by the same reference numerals, and the duplicated description will be omitted here.

In this embodiment, a multiplier (MLT) 54 is arranged in front of the switch 51 instead of the above-mentioned amplifier 53, and when the VCO output of the local oscillation circuit is transferred, the local oscillation circuit is used. By supplying it to the switch 51 via the multiplier 54 having a higher order than the multiplier 32 of the section, data transfer can be performed with a carrier wave of a high frequency.

Therefore, according to the above configuration, the antenna gain can be increased as compared with the case where the frequency of the local oscillation signal is low, so that data transfer can be performed with less power consumption.

FIG. 12 is a tenth embodiment of the present invention, which is a development of the second embodiment shown in FIG. 2 and has a data transfer level switching function similar to that of the seventh embodiment shown in FIG. 1 shows a configuration of a radio selective calling device based on a double superheterodyne reception system, which is provided. In FIG. 12, the same parts as those in FIGS. 2 and 9 are designated by the same reference numerals, and the duplicated description will be omitted here.

In this embodiment, the local oscillation signal output from the MLT 32 is transmitted to the antenna 21 via the amplifier 36 described above.
To the antenna 2 directly without passing through the amplifier 36
1 is provided with a switch 51 that selectively switches the path to be sent to 1 in accordance with the reception level detection signal output from the quadrature detector 48, and further the antenna tuning frequency is set to the frequency of the local oscillation signal at the time of data transfer by a command from the CPU 34. The antenna tuning circuit 52 for adjusting is provided.

As described above, the receiving section of this device is constructed by the double superheterodyne receiving system and modulates the local oscillation circuit section which is composed of the PLL frequency synthesizer. The data such as the received message held in the ROM 33 is read by the CPU 3 when the data is read out.
4 and is applied to the modulation input terminal of the VCO 31 via the modulator 35. The modulated local oscillation output is applied to the switch 51 controlled by the reception level detection signal output from the quadrature detector 48 according to the level of the reception input signal.

When the received input signal is sufficiently large, it is considered that the base station system of the data transfer destination is near, so the local oscillation output applied to the switch 51 is supplied to the antenna without being amplified. It On the other hand, when the input level of the input signal is low, it is considered that the data transfer needs to be performed by the carrier wave of higher power, and the switch 51 is switched to the amplifier 36 side.

The amplifier 36 is connected to C when the switch 51 is not on the amplifier side and data transfer is not performed.
Power is not supplied under the control of the PU 34. The frequency of the local oscillation output at the time of data transfer is controlled by the channel data sent from the CPU 34 to the phase comparator 29,
At the same time, the electronically controlled antenna tuning circuit 552 is also controlled so that the antenna 21 tunes to this frequency.

Therefore, according to the above configuration, the data can be transferred through the channels other than the receiving channel, and the radiation efficiency is not deteriorated. The modulated signal (transfer data) supplied to the antenna as described above is transmitted to the outside of the radio selective calling device.

FIG. 13 is an eleventh embodiment of the present invention, which is a development of the combination of the second and third embodiments shown in FIGS. 2 and 3, and further the eighth embodiment shown in FIG. 1 shows a configuration of a radio selective calling device based on a double superheterodyne reception system, which is provided with a similar data transfer level switching function. In FIG. 13, the same parts as those in FIGS. 2, 3, 10, and 12 are designated by the same reference numerals, and a duplicate description will be omitted here.

In this embodiment, an amplifier 53 is further added before the switch 51, and when the switch 51 is connected to the amplifier 36 side, a two-stage amplifier configuration is formed, and when it is connected to the opposite side. Has a single-stage amplifier configuration.

According to this structure, the tenth element shown in FIG.
Compared with the embodiment described above, data transfer can be performed with a carrier wave having a larger power. In the above configuration, the amplifier 5
In No. 3, it is assumed that power is not supplied under the control of the CPU 34 when data transfer is not performed.

FIG. 14 shows, as a twelfth embodiment of the present invention, a configuration of a radio selective calling apparatus based on the double superheterodyne reception system, which is a modification of the eleventh embodiment shown in FIG. In addition, in FIG.
The same parts as those of No. 3 are denoted by the same reference numerals, and the duplicate description is omitted here.

In this embodiment, as in the case of the ninth embodiment shown in FIG. 11, a multiplier (MLT) 54 is arranged in front of the switch 51 instead of the above-mentioned amplifier 53, and the local oscillation circuit section is arranged. When data is transferred from the VCO output of, the multiplier 5 of higher order than the multiplier 32 of the local oscillation circuit unit
The data is supplied to the switch 51 via the switch 4, so that the data transfer can be performed by the carrier wave having the high frequency.

Therefore, according to the above configuration, the antenna gain can be increased as compared with the case where the frequency of the local oscillation signal is low, so that data transfer can be performed with less power consumption.

FIG. 15 shows an example of the configuration of a response (answer back) system for the radio selective calling device to the base station device, which can be realized by the present invention. Reference numeral 61 is a base station management station and 621.
˜624 are managed by the known station management station 61 and are base stations having different jurisdiction areas, and 63 is a radio selective calling apparatus according to the present invention. Each AT represents an antenna.

Assuming that the radio selective calling device 63 is present in the area of the base station 621, the call signal wave A transmitted from the base station management station 61 and radiated from the antenna AT of the base station 621 is radio selected. It is received by the calling device 63. At this time, if the local oscillation output B is transmitted as a signal wave to the base station 621 by the method of the present invention, the information is sent to the base management station 61, and a response (answer) is sent from the radio selective calling device 63 as the base station system. Back) has been obtained.

In this way, bidirectional communication becomes possible between the base station system and the radio selective calling device. For example, when the present system is applied to a radio selective calling system in a limited space such as indoor paging, reception operation confirmation and notification of the setting state of each device to the base station system can be realized.

FIG. 16 is a diagram showing a state of one-to-many data communication of the radio selective calling device which can be realized by the present invention.
Reference numerals 641 to 645 are radio selective calling devices capable of transmitting and receiving data. Each AT represents an antenna.

According to the present invention, each of the radio selective calling devices 642 to 645 on the data receiving side is set to a specific data receiving mode in advance, and then the data is sent from the radio selective calling device 641 on the data transmitting side. Then, one device 641
Data can be simultaneously transferred to a plurality of devices 642 to 645. The data transferred here includes a received message and an internal setting mode.

It should be noted that, in order not to maliciously rewrite the data of another device, the device on the data receiving side should be able to receive the data only when it is in the data receiving mode which cannot be easily entered. Good.

[0085]

As described above, according to the present invention, there is provided a wireless selective calling device which realizes wireless communication of internally held and stored data with a simple structure, and further, it is used in this device to remotely connect to a base station system. It is possible to provide a wireless selective calling system that enables bidirectional communication and a data transfer system that enables one-to-many communication between devices.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a configuration in the case of being applied to a radio call selection device by a direct conversion receiving system as a first embodiment of the present invention.

FIG. 2 is a block circuit diagram showing another configuration of the second embodiment of the present invention when it is applied to a radio paging selection device by a direct conversion receiving system.

FIG. 3 is a block circuit diagram showing another configuration of the third embodiment of the present invention when applied to a radio call selection device by a direct conversion receiving system.

FIG. 4 is a block diagram showing another configuration example of the switch unit according to the third embodiment.

FIG. 5 is a block circuit diagram showing a configuration of a fourth embodiment of the present invention when applied to a radio call selection device using a double superheterodyne reception system.

FIG. 6 is a block circuit diagram showing another configuration of the fifth embodiment of the present invention when it is applied to a radio paging selection device by a double superheterodyne reception system.

FIG. 7 is a block diagram showing another configuration example of the antenna unit according to the fifth embodiment.

FIG. 8 is a block circuit diagram showing another configuration of the sixth embodiment of the present invention when it is applied to a radio paging selection device by a double superheterodyne reception system.

FIG. 9 is a block diagram showing a configuration of a radio selective calling device by a direct conversion receiving system, which is a development of the second embodiment as a seventh embodiment of the present invention, and is provided with a data transfer level switching function. circuit diagram.

FIG. 10 shows the second and third embodiments of the present invention.
2 is a block circuit diagram showing a configuration of a radio selective calling device by a direct conversion receiving system, which is obtained by developing a combination of the above embodiments and further having a data transfer level switching function.

FIG. 11 is a block circuit diagram showing a configuration of a radio selective calling device according to a direct conversion reception system, which is a modification of the eighth embodiment as a ninth embodiment of the present invention.

FIG. 12 is a tenth embodiment of the present invention, which is based on a double superheterodyne receiving system, which is an extension of the second embodiment and has the same data transfer level switching function as that of the seventh embodiment. The block circuit diagram which shows the structure of a radio selective calling device.

FIG. 13 is an eleventh embodiment of the present invention in which a combination of the second and third embodiments has been developed to further have a data transfer level switching function similar to that of the eighth embodiment. The block circuit diagram which shows the structure of the radio selective calling apparatus by the double super heterodyne receiving system.

FIG. 14 is a block circuit diagram showing a configuration of a radio selective calling device according to a double superheterodyne reception system, which is a modification of the eleventh embodiment as a twelfth embodiment of the present invention.

FIG. 15 is a block configuration diagram showing a configuration of a radio selective calling system that realizes a response (answer back) to a base station system by the radio selective calling device of the present invention.

FIG. 16 is a block configuration diagram showing a configuration of a data transfer system that realizes one-to-many data transfer between devices by the wireless selective calling device of the present invention.

FIG. 17 is a block circuit diagram showing a configuration in the case of transferring internally held data to the outside in a conventional radio selective calling device.

[Explanation of symbols]

 11 ... Radio selective calling device 111 ... ROM 112 ... CPU 113 ... External connection interface circuit 12 ... External storage device 21 ... Antenna 22 ... High frequency amplifier 231, 232 ... Mixer 241, 242 ... Filter 25 ... Direct conversion detector 26 ... + π / 4 phase shifter 27 ... -.pi./4 phase shifter 28 ... Reference oscillation circuit 29 ... Phase comparator (PC) 30 ... Loop filter 31 ... Voltage controlled oscillator (VCO) 32 ... Multiplier (MLT) 33 ... ROM 34 ... CPU 35 ... Modulator (MOD) 36 ... Amplifier 37 ... Transmission / reception switch 38 ... On / off switch 41 ... High frequency filter 42 ... First mixer 43 ... First intermediate frequency filter 44 ... Second local oscillation circuit 45 ... Second 2 mixer 46 ... 2nd intermediate frequency filter 47 ... 2nd intermediate frequency amplifier 48 ... Quadrature detection Device 49 ... Electronic control antenna tuning circuit 51 ... Gain changeover switch 52 ... Electronic control antenna tuning circuit 53 ... Amplifier 54 ... Modulator (MLT) 61 ... Base station management station 621-624 ... Transceive base station 63 ... Radio selective calling device 641 ... 645 ... Radio selective calling device A ... Call signal wave of base station B ... Response signal wave of radio selective calling device C ... Data transfer line a ... Local oscillation signal radiation output

Claims (12)

[Claims] 1. A radio receiver for receiving a signal wave transmitted from a base station, comparing the signal wave with its own ID, and notifying that the ID is received, wherein the local oscillation circuit of the receiving section is a PLL frequency synthesizer. In the radio selective calling device configured, a modulation means provided in the local oscillation circuit for modulating the local oscillation signal by a modulation signal supplied to a modulation input terminal, and a storage inside the device according to a transfer command from the outside of the device Data transfer processing means for encoding data and supplying it to the modulation input terminal of the local oscillation circuit to modulate the local oscillation signal with the encoded data, and a local oscillation signal modulated by the encoded data by this means outside the device. And a radio transmitting means for outputting as a radio frequency signal to the radio selective calling device. 2. The radio selective calling apparatus according to claim 1, wherein the radio transmission means uses leakage of the local oscillation signal. 3. The radio selection according to claim 1, wherein the radio transmission means includes an amplifier for amplifying the local oscillation signal, and an output of the amplifier is radiated from an antenna of the reception section. Calling device. 4. The radio selective calling device according to claim 3, wherein the radio transmission means has a function of controlling the power supply of the amplifier to an ON state only during data transfer. 5. The radio selective calling device according to claim 1, wherein the radio transmission means includes a switch for supplying the local oscillation signal to the antenna of the reception unit only during data transfer. 6. The radio selective calling device according to claim 1, wherein the radio transmitting means has a function of adjusting an antenna tuning circuit of the receiving unit to a frequency of the local oscillation signal at the time of data transfer. 7. The radio selective calling device according to claim 1, wherein the radio transmission means includes transmission level switching means for switching the transmission level of the local oscillation signal according to the reception level of the reception section. 8. The transmission level switching means comprises a plurality of paths for supplying the local oscillation signal to the antenna of the receiving section with different gains, and a switch for selecting these paths according to the reception level. 8. The radio selective calling device according to claim 7, wherein: 9. The receiving unit is a direct conversion receiving system, and the data transfer processing means modulates a local oscillation signal for quadrature detection.
The wireless selective calling device described. 10. The radio selective calling apparatus according to claim 1, wherein said receiving section is a double superheterodyne receiving system, and said data transfer processing means modulates the first local oscillation signal. 11. A wireless selective calling device in any of the areas can receive the calling signal by wirelessly sending a calling signal sent from a base station management station from a plurality of base stations having different areas. In a radio selective calling system, the device of claim 1 is used as the radio selective calling device,
A radio selective calling system characterized in that the local oscillation signal is wirelessly transmitted when the call signal is received, and a base station managing the area receives the local oscillation signal and sends it to the base station management station. 12. A radio selective calling device according to claim 1, wherein a plurality of radio selective calling devices are provided, one of which transmits a local oscillation signal modulated by stored data in the device, and the other of which receives a transmission output thereof to mutually transfer data. A data transfer system characterized by performing.