JPH08307917A - Private paging system - Google Patents

Abstract

PURPOSE: To improve the convenience of the use by easily and securely judging the present moving position (moving place) of a radio portable terminal which a user carriers. CONSTITUTION: The radio portable terminal 50 transmits ID of a self radio portable terminal to radio base stations 51-54. The radio base stations discriminate ID of the radio portable terminal from modulation data. A central control station 60 encodes the ID and arranges received data in order from the highest received signal level (received electric field intensity). It is discriminated which radio base station has the maximum received signal level among the levels. It is discriminated to which radio base station of premise the radio portable terminal is adjacent. When the received signal levels are the radio base station 54 > the radio base station 51 > the radio base station 52 > the radio base station 53, the radio portable terminal is positioned between the radio base station 54 and 51, and it moves to a position nearer to the radio base station 52 than the radio base station 53. Thus, information on the moving position (moving place) is displayed on a display part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private paging system in which a wireless portable terminal receives a wireless transmission from a wireless base station and calls the wireless portable terminal.

[0002]

2. Description of the Related Art Conventionally, in a private paging system, a wireless base station (exchange) makes a wireless simultaneous call to a wireless mobile terminal and the wireless mobile terminal receives the wireless call. The wireless mobile terminal checks the call identification number (ID) for itself from the received data and makes the call by sound, screen display or vibration. In this way, a call is made to a specific wireless mobile terminal.

A wireless mobile terminal equipped with an additional function as well as a call to such a specific wireless mobile terminal is disclosed in Japanese Unexamined Patent Publication No. 63-227132, “In-house paging system”, and Japanese Unexamined Patent Publication No. 4-122133, “Simple cellular phone”. Method ”and the like. In the former conventional example, the moving range of a plurality of slave stations on the premises is checked, and the message is transmitted only to the master station (radio base station) in this range. Further, in the latter conventional example, a cordless telephone and a pager are combined to achieve multi-functionality and to reduce the usage fee.

[0004]

Each of the above-mentioned conventional wireless portable terminals has only a single function of receiving a wireless transmission from the wireless base station and calling the wireless transmission.
In other words, there is a drawback that it cannot be used for various purposes because data and the like cannot be transmitted.

The present invention solves the above-mentioned drawbacks of the prior art. The wireless mobile terminal can be called wirelessly and the current moving position (moving point) of the wireless portable terminal can be easily and surely determined. However, it is an object of the present invention to provide an indoor paging system that is more convenient to use.

[0006]

In order to achieve the above object, the invention according to claim 1 is such that a wireless mobile terminal receives a wireless call from a central control station through a plurality of wireless base stations, and calls the wireless call. And a paging system for determining the current moving position of a wireless mobile terminal,
The wireless mobile terminal identifies whether or not the wireless call from the central control station through the wireless base station is addressed to itself, makes the call, and wirelessly transmits the self-identification code. While making a wireless call to the mobile terminal, the wireless transmission from the wireless mobile terminal is received, the central control station identifies the wireless mobile terminal from the identification codes sent from the multiple wireless base stations, and multiple wireless In the configuration, the current moving position of the wireless mobile terminal identified based on the received signal level corresponding to the received electric field strength from the base station is determined.

According to a second aspect of the present invention, in the private paging system, the wireless mobile terminal makes a call by identifying whether the wireless call from the central control station through the wireless base station is addressed to itself or not. A base wireless transmission means for wirelessly transmitting a self-identification code, wherein the plurality of wireless base stations wirelessly calls the wireless mobile terminal, and a base reception for receiving wireless transmission from the wireless mobile terminal. Means for identifying the wireless mobile terminal from the identification code included in the received signals from the plurality of wireless base stations, and a received signal corresponding to the received electric field strength from the plurality of wireless base stations. Determination means for determining the level,
The determining means determines the current moving position of the wireless mobile terminal specified by the specifying means based on the level of the signal received by the determining means.

According to another aspect of the present invention, in the private paging system, the judging means is closest to the radio base station having the maximum received signal level at which the current mobile position of the radio portable terminal is maximum, and
Each time the received signal level decreases, it is determined that the wireless base station is moving away from the wireless base station, and the current moving position of the wireless mobile terminal is determined.

According to a fourth aspect of the present invention, in the private paging system, the display means for displaying the current moving position of the wireless portable terminal judged by the judging means in any one of a map screen display, a synthetic voice output, a character display or a combination thereof. Is provided.

According to a fifth aspect of the present invention, in the private paging system, the terminal wireless transmission means of the wireless mobile terminal intermittently wirelessly transmits the self-identification code.

[0011]

In the indoor paging system having the above-mentioned structure according to the first, second and third aspects of the present invention, it is determined whether the wireless portable terminal is addressed to itself, the wireless call is made, and the self-identification code is wirelessly transmitted. I am sending. A plurality of wireless base stations receive this transmission, and the central control station identifies the identification code from this received signal to identify the wireless mobile terminal. Further, the current moving position of the specified wireless mobile terminal is determined based on the received signal levels from the plurality of wireless base stations.

In this case, it is assumed that the current moving position of the wireless mobile terminal is the closest to the wireless base station where the maximum received signal level is obtained and is away from the wireless base station each time the received signal level decreases. Deciding. Therefore, the wireless mobile terminal can be wirelessly called and the current moving position of the wireless mobile terminal can be easily and surely determined.

In the indoor paging system according to the fourth aspect, since the current moving position of the wireless mobile terminal is displayed in any one of a map screen display, a synthetic voice output, and a character display, or a combination thereof, the wireless radio carried by the user. The current movement position (movement point) of the mobile terminal can be quickly, easily and surely found through the map, voice and characters.

In the indoor paging system according to the fifth aspect, since the terminal wireless transmission means of the wireless portable terminal intermittently wirelessly transmits the self-identification code, the power consumption is reduced and the built-in battery can be used for a long time. Like

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the indoor paging system of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a wireless mobile terminal in an embodiment of the indoor paging system of the present invention. FIG. 1 is provided with an antenna 1 for receiving radio calls from a plurality of radio base stations shown in FIG. 2 and a distributor (duplexer) 2 for sharing the antenna 1 for transmission and reception. In addition, a reception unit 3 that outputs an intermediate frequency (IF) signal obtained by high-frequency amplification and frequency conversion of the reception signal from the distributor 2, and a demodulation unit 4 that obtains demodulated data from the IF signal from the reception unit 3. Is provided.

Further, amplification of the transmitted signal is performed,
Alternatively, the input / output (I
/ O) signal processing unit 5 and a speaker 6 for outputting a ringing signal from the I / O signal processing unit 5 to call the wearer.
And a vibrator 7 for transmitting a calling signal from the I / O signal processing unit 5 by vibration to call the wearer. Further, a liquid crystal display (LCD) 8 for displaying a contact number of the calling side on the screen based on a calling signal from the I / O signal processing unit 5 and a sound output or vibration for the I / O signal processing unit 5 are displayed. A keyboard 9 for setting one or both of the transmissions is provided.

Further, the identification number in the demodulated data from the I / O signal processing unit 5 is compared with the ID of the self-wireless portable terminal stored in advance, and if they match each other, a calling signal is output, and the sound output and the vibrator 7 are output. And a data processing unit 10 for periodically (intermittently) reading out and sending out a self ID while transmitting a call by vibration due to
A storage unit 11 is provided for storing D in advance and for storing the contact number of the caller received.

Further, in order to wirelessly transmit the transmission signal,
Transmission unit 12 for converting to a transmission frequency and performing power amplification
A modulation unit 13 for modulating the transmission signal, a microphone 16 for outputting the transmission signal, and a direct current to each unit,
A power supply 17 using a charging battery or the like is provided. The I / O signal processing unit 5 may compare the identification number in the demodulated data performed by the data processing unit 10 with the ID of the self-wireless mobile terminal stored in the storage unit 11.

FIG. 2 is a block diagram showing the structure of the radio base station. To the wireless base station of FIG. 2, an antenna 21 for calling and transmitting to the wireless mobile terminal shown in FIG. 1 and receiving a transmission from the wireless mobile terminal, and a distribution for sharing this antenna 21 for transmission and reception. Container (Duplexer) 22
Are provided. Further, the received signal from the distributor 22 is subjected to high frequency amplification and frequency conversion to an intermediate frequency (I
F) a receiving unit 23 that outputs a signal, and a demodulating unit 2 that outputs demodulated data demodulated from the IF signal from the receiving unit 23
And 4 are provided.

Also, from the received data, the ID of the wireless mobile terminal
And a re-encoding unit 26 that encodes the ID, takes in the IF signal from the receiving unit 23 together with the code, and outputs reception data indicating the ID and the reception signal level (reception field strength). And are provided. Further, an input / output (I / O) signal processing unit 27 that amplifies the transmission signal or sends the received data from the re-encoding unit 26, and a data process that sends the ID of the wireless mobile terminal stored in advance. A unit 30 and a storage unit 31 that stores the ID of the wireless mobile terminal in advance are provided. Further, in order to wirelessly transmit the transmission signal, a transmission unit 33 that converts the transmission frequency to a transmission frequency and amplifies the power, a modulation unit 34 that performs modulation by the transmission signal, and a direct current to each unit using a charging battery or the like. And a power supply 37 for supplying power.

FIG. 3 is a block diagram showing the configuration of the central control station. The central control station in FIG. 3 is, for example, a private branch exchange (P
BX) and an I / O signal processing unit 40 for exchanging received data and call data with the I / O signal processing unit 27 of the radio base station shown in FIG. 2, and an I / O signal processing unit. A code processing unit 41 for coding the received data processed and sent at 27, and a discrimination processing unit 42 for discriminating the respective received signal levels transmitted from the radio base stations 51 to 55 shown in FIG. Is provided.

A display unit 43 for displaying the current movement position (movement point) on a plurality of wireless mobile terminals, an exchange process between an extension telephone terminal and an outside line, and a wireless call of the wireless portable terminal from an extension telephone terminal. A central control processing unit 45 for giving an instruction to the wireless base station shown in FIG. 2 and extension telephone terminals 46a ... 46n connected to the central control processing unit 45 for making a wireless call to a wireless portable terminal are provided.

Next, the operation of this embodiment will be described. FIG. 4 is a perspective view showing a usage state of this indoor paging system. In the example of FIG. 4, when the user is on the premises, FIG.
The wireless portable terminal 50 shown in FIG. In addition, a plurality of wireless base stations 5 shown in FIG.
1, 52, 53, 54, 55 are installed. Also,
The central control station 60 shown in FIG. 3 is connected to the wireless base stations 51 to 55 by a wired line (signal line).

First, the calling operation will be described.
46n when the wireless mobile terminal 50 is called to the central control processing unit 45 of the central control station 60, the central control processing unit 45 wirelessly transmits the calling data through the I / O signal processing unit 40. It is sent to the base stations 51 to 55. In the wireless base stations 51 to 55, the call data is transmitted as shown in FIG.
The I / O signal processing unit 27 shown in FIG.
4, the transmission unit 33, the distributor 22, and the antenna 21.

This transmission is received by the antenna 1 shown in FIG. 1 in the wireless mobile terminal 50. The received signal from the antenna 1 is input to the receiving unit 3 via the distributor 2. The receiving unit 3 performs high frequency amplification and frequency conversion, and outputs an intermediate frequency (IF) signal thereof. From this IF signal to the demodulation unit 4
Demodulates the calling data and outputs the demodulated data. I
The ID number in the demodulated data from the / O signal processing unit 5 is compared with the ID of the self-wireless mobile terminal stored in the storage unit 11 in advance by the data processing unit 10, and if they match, the I / O
A calling signal is output to the O signal processing unit 5.

A call type (alert) is preset in the I / O signal processing section 5 from the keyboard 9. When the call by sound output is set here, the call by sound output is performed from the speaker 6. Further, when the call by vibration is set, the vibrator 7 vibrates and calls the call. Furthermore, LCD8
Display the caller's contact number etc. on the screen.

With such a call, the current moving position (moving point) of the wireless portable terminal 50 is displayed on the display unit 43 in the central control station 60 shown in FIG. In this case, the wireless mobile terminal 50 periodically reads out the ID of the self wireless mobile terminal from the data processing section 10 from the storage section 11 shown in FIG. 1 and outputs it from the modulation section 13, the transmission section 12, the distributor 2 and the antenna 1. It transmits to the wireless base stations 51 to 55. As a result, by transmitting the ID of the self-wireless portable terminal periodically (intermittently), the power consumption of the power supply 17 (charging battery) is reduced, and long-time specification is possible.

In the radio base stations 51 to 55, the transmission (radio mobile terminal ID) from the radio portable terminal 50 is received through the antenna 21 and the receiving section 23 shown in FIG. 2, and the demodulation data is discriminated from the demodulation section 24. It is output to the unit 25. The determination unit 25 determines the received ID of the wireless mobile terminal 50. This ID is output to the re-encoding unit 26. Re-matching section 2
In 6, the ID is coded, and together with the code, the receiving unit 2
The I / O signal processing unit 27 takes in the IF signal from the signal No.
Through the central control station 60.

In the central control station 60, the received data received by the I / O signal processing section 40 shown in FIG.
Is input to The code processing section 41 codes the received data processed and sent by the I / O signal processing section 27. Further, in the determination processing unit 42, the wireless base stations 51 to 55
The received data sent from is arranged in order of received signal level. Then, the position of the wireless mobile terminal 50 is closest to the wireless base stations 51 to 55 from which the maximum received signal level (maximum electric field strength) is obtained, and the received signal level (maximum electric field strength)
When the wireless mobile terminal 50 is gradually separated from the wireless base stations 51 to 55, the current moving position of the wireless portable terminal 50 is determined (determined).

In this determination, the received signal levels of the radio base stations 51 to 55 are such that the radio base station 54> the radio base station 5
In the case of 1> radio base station 52> radio base station 53, the radio portable terminal 50 is located between the radio base stations 54 and 51, and
It is found that the wireless base station 52 is located closer to the wireless base station 52 than the wireless base station 53. The current movement position information found by the discrimination processing unit 42 is displayed on the screen of the display unit 43. In this screen display, the current moving position (moving point) is displayed in characters or a map of the premises is displayed, and the current moving position (moving point) is displayed on the screen with a mark on the map. Alternatively, the current moving position (moving point) may be converted into synthetic voice and output as voice.

Further, the information on the current movement position found by the discrimination processing section 42 may be sent to the central control processing section 45 and displayed by the extension telephone terminals 46a ... 46n. Similar to the display on the display unit 43, this display displays the current movement position (movement point) in characters on the screen or displays a map of the premises, and marks the current movement position (movement point) on the map. Display on screen. Also, the current moving position (moving point) is converted into synthetic voice and output as voice. In this case, the current movement position (movement point) can be promptly identified by the extension telephone terminals 46a ... 46n that have called. In this case, the extension telephone terminals 46a ... 46n are control units configured to control a display unit including a liquid crystal display (LCD), a voice output unit, and a synthesized voice output unit. .

[0032]

As is apparent from the above description, according to the indoor paging system of claims 1, 2 and 3, the wireless mobile terminal is wirelessly called and the self-identification code is transmitted to a plurality of wireless base stations. Radio transmission is performed, and the central control station identifies the identification code from the received signal to identify the wireless mobile terminal. Furthermore, since the current moving position of the specified wireless mobile terminal is determined based on the received signal level from each of the plurality of wireless base stations, the wireless mobile terminal can wirelessly call and the current status of the wireless mobile terminal can be obtained. It has an effect that the moving position of the is easily and surely determined, and the convenience of its use is improved.

According to the indoor paging system of the fourth aspect, since the current moving position of the wireless mobile terminal is displayed in any one of a map screen display, a synthesized voice output, and a character display, or a combination thereof, the user can carry it. The present invention has an effect that the current moving position (moving point) of the wireless portable terminal can be quickly, easily and surely determined.

According to the indoor paging system of the fifth aspect, since the wireless portable terminal intermittently wirelessly transmits the self-identification code, the power consumption is reduced and the built-in battery can be used for a long time. Has the effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a wireless mobile terminal in an embodiment of a private paging system of the present invention.

FIG. 2 is a block diagram showing a configuration of a wireless base station in the embodiment.

FIG. 3 is a block diagram showing a configuration of a central control station in the embodiment.

FIG. 4 is a perspective view showing a usage state of the indoor paging system in the embodiment.

[Explanation of symbols]

 3,23 Reception unit 4,24 Demodulation unit 6 Speaker 7 Vibrator 8 LCD 9 Keyboard 10 Data processing unit 11,31 Storage unit 12,33 Transmission unit 13,34 Modulation unit 25 Discrimination unit 26 Re-encoding unit 41 Encoding processing unit 42 Discrimination Processing unit 43 Display unit 45 Central control processing unit 46a ... 46n Extension telephone terminal 50 Wireless mobile terminal 51-55 Wireless base station 60 Central control station

Claims (5)

[Claims] 1. A private paging system in which a wireless mobile terminal receives a wireless call from a central control station through a plurality of wireless base stations, calls the wireless mobile terminal, and determines the current moving position of the wireless mobile terminal. There, the wireless mobile terminal identifies whether the wireless call from the central control station through the wireless base station is addressed to itself,
While making the call, wirelessly transmitting the self-identification code, and the plurality of wireless base stations wirelessly calling the wireless portable terminal, receiving wireless transmission from the wireless portable terminal, and the central control station Identifies the wireless portable terminal from the identification codes transmitted from the plurality of wireless base stations, and identifies the wireless mobile terminal based on the received signal level corresponding to the received electric field strength from the plurality of wireless base stations. An indoor paging system characterized by being configured to determine the current movement position of a mobile terminal. 2. The wireless portable terminal wirelessly transmits a self-identification code and a wireless reception calling unit that makes a call by identifying whether or not the wireless call from the central control station through the wireless base station is addressed to itself. Terminal wireless transmitting means, wherein the plurality of wireless base stations, a base wireless transmitting means for making a wireless call to the wireless portable terminal, and a base receiving means for receiving wireless transmission from the wireless portable terminal, The central control station, the specifying means for specifying the wireless mobile terminal from the identification code included in the received signals from the plurality of wireless base stations, and the received signal level corresponding to the received electric field strength from the plurality of wireless base stations. And a determination unit that determines the current movement position of the wireless mobile terminal identified by the identification unit based on the received signal level of the determination unit. Premises paging system of claim 1 wherein the. 3. The determination means is closest to the wireless base station at which the current mobile position of the wireless mobile terminal has the maximum received signal level, and is gradually separated from the wireless base station each time the received signal level decreases. 3. The indoor paging system according to claim 2, wherein the current moving position of the wireless mobile terminal is determined based on the determination. 4. A display means for displaying the current movement position of the wireless mobile terminal determined by the determination means in any one of a map screen display, a synthesized voice output, and a character display, or a combination thereof. The indoor paging system according to claim 2. 5. The indoor paging system according to claim 2, wherein the terminal wireless transmission means of the wireless portable terminal intermittently wirelessly transmits the self-identification code.