JPH0681088B2 - A paging system with a message that allows communication between paging slaves. - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paging system, and more particularly to a paging system with a message that allows two-way communication between paging slave units.

[Conventional technology]

Conventionally, the paging system is one-way communication from the caller to the owner of the paging receiver, and the communication from the owner of the paging receiver is usually using a telephone.
Moreover, it was only communication with a specific telephone. After that, a paging system with a message was proposed, and it became possible to convey message information to the owner of the paging receiver, but this was also one-way communication.

[Problems to be solved by the invention]

Since the conventional paging system can perform only one-way communication as described above, it is limited to a service that merely conveys a message or a service in a region where telephones are prevalent. On the other hand, demands for two-way communication between paging receiver owners are increasing. Of course, as two-way communication, there are car phones, MCA, etc. and simple transceivers, but use radio waves very luxuriously,
For that reason, there is a drawback that the subscribers cannot be improved.

An object of the present invention is to provide a paging system with a message, which allows two-way communication between paging slave units, paying attention to the feature that a large number of subscribers per frequency can be obtained in the paging system.

[Means for solving problems]

According to the present invention, a paging child having a paging signal receiving means and means for inputting desired paging number and message information, and means for transmitting the desired paging number and message information together with its own paging number as a call request signal. And a means for transmitting a paging signal to the paging slave, a means for receiving a call request signal from the paging slave, and the paging number and message for the paging slave based on the received information, and the calling side. And a paging base station having means for transmitting the paging number and the confirmation signal to the paging slave unit as paging signals, respectively, wherein the paging signal and the paging request signal use different radio channels. Page with message that allows communication between paging slaves Ring system is obtained.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. Here, a paging system by a paging base station having three paging masters arranged one by one in adjacent areas within a certain range will be described.

1a and 1b are paging slaves, which have a receiving and transmitting function. 2a, 2b, 2c are distributed transmitters of the paging master unit, 3a, 3b, 3c are receivers of the paging master unit, 4a, 4b, 4c
Is an antenna. Reference numeral 5 is a paging encoder device, 6 is a paging call acceptance device, 7 is a general exchange, and 8 is a telephone.

In the conventional paging service, the telephone 8 dials the paging number of the paging cordless handset (for example, 1a) of the person who wants to call, and this signal is input to the paging encoder device through the exchange 7. The encoded paging signal is transmitted by the transmitters 2a, 2b, 2c,
From the antennas 4a, 4b and 4c, the radio waves of the channel CH1 are transmitted and the corresponding paging slave unit 1a is called.

Next, the calling service from the paging slave unit is realized as follows. For example, if you want to call the paging slave device 1a from the paging slave device 1b,
From 1a, the paging number of its own paging slave unit 1b, the paging number of the paging slave unit 1a, and the message information to be transmitted to the other party (hereinafter collectively referred to as a call request signal) are sent on the radio wave of channel CH2. This call request signal is sent to the nearest paging master antenna 4
b, received by the reception unit 3b, and sent to the paging call reception device 6. The paging call accepting device 6 decodes the paging call request signal and sends a paging signal to the paging slave device 1a and an acceptance confirmation signal to the paging slave device 1b to the paging encoder device 5. The signal encoded by the paging encoder device 5 is used as a paging signal in the transmitters 2a, 2b, 2c and the antenna 4 of the pacing base unit.
Radio waves CH1 are transmitted from a, 4b, and 4c. As a result, the paging slave unit 1a is called with the message information sent from the paging slave unit 1b, and the paging slave unit 1b is called.
Is called with confirmation information that the call request signal has been accepted.

Next, the signal flow will be described with reference to FIG.

The signal (a) is an example of a signal when a call is made from the paging slave device 1b to the paging slave device 1a. The synchronization signal SC, the paging number Nb of the self, the paging number Na of the partner and the message information I, I, I Are sent continuously (for example,
Each signal is 512 bits / sec and is 31 bits long). This paging call request signal is received by the receiving unit 3b of the nearest paging master unit and input to the paging call reception device 6. The paging call accepting device 6 decodes the paging call request signal received from each paging master unit, checks whether or not the same paging call request signal is simultaneously accepted from a plurality of paging master units, and if they are accepted, it is regarded as one call. A paging call request signal is sent to the paging encoder device 5. This is because, for example, a paging call request signal from the paging slave device 1b may be received by a plurality of paging master devices. Further, each signal of the paging call request signal is composed of a code having a bit error detection / correction function (for example, BCH (31,21) code), and a plurality of paging slave units call one paging master unit. If both occur simultaneously, a bit error occurs and the call is canceled. In this way, erroneous information is prevented from being transmitted.

The signal (b) is an example of a call signal sent from the paging call accepting device 6 to the paging encoder device 5, and is a call signal to the paging slave device 1a to be called in response to the paging call request signal received from the paging master device. It is sent to the paging encoder device 5 as a confirmation signal for the paging slave unit 1b that has called. Here, as the confirmation signal, a predetermined signal A of the paging number (here, Nb) and message information at the time of normal calling is transmitted.

The signal (c) is an example of a paging signal transmitted from the paging encoder device 5 to each paging master unit, and a calling signal is transmitted following the preamble signal P and the synchronization signal SC (for example, the signal speed is 512 bit / In sec, all signals except the preamble signal P are 31 bits). In this example, the calling signal Na, I, I, I to the paging slave 1a and the calling signal Nb, A to the paging slave 1b are followed by the synchronization signal SC.
(Actually this will be a confirmation signal). In this way, by sending a confirmation signal to the paging cordless handset 1b that has called, a transmission failure such as a paging cordless request signal not being received by any of the paging cordless handsets due to weak radio waves from the paging cordless handset. I can inform you.

Next, regarding the details of the paging cordless handset, FIG. 3, FIG.
Details will be described with reference to FIG.

FIG. 3 is a block diagram of the paging slave unit. First, the reception function will be described. The radio signal of the channel CH1 received from the antenna 11 is amplified and demodulated by the receiving unit 12. The demodulated signal is collated by the decoder 13 with its own paging number written in the ROM 14, and when they match, the CPU 15 is notified that there is a call. The CPU 15 receives the message information following the paging number, causes the LCD display 16 to display the message information, and causes the speaker 18 to ring through the driver 17 to notify the owner of the paging cordless handset that there is a call. The CPU 15 operates by the clock generated by the crystal oscillator 19.

Next, the transmission function will be described. By inputting the paging number to call and the message to send from the data input switch section 21 by the operation described later and performing the sending operation, the CPU 15 receives the paging number Nx and its own paging number Nx written in the synchronization signal SC, ROM14. The paging number and message are encoded into a paging call request signal and output to the transmission unit 22. The transmitter 22 modulates the paging call request signal into a radio signal of the channel CH2 and sends it to the air through the antenna 11.

Next, the operation of the CPU 15 will be described in more detail with reference to FIG. A series of operation instructions for performing a series of processing operations is written in the program memory 1501, the contents of the address corresponding to the contents of the program counter 1502 are output to the control unit 1503, and the contents of the control unit 1503 are controlled by the respective units. Send a control signal to. Program counter 1502 is the program memory 15
Every time the content of 01 is sent to the control unit 1503, +1 is normally added, but when there is a jump instruction or the like, it is followed. The interface between the external circuit and the data bus 1506 is input port 1507, output port 1508, input port 1509, output port 151.
0, output port 1511, input port 1512, input port 1513. The data bus 1506 includes a program counter 1502, a data memory 1514, an arithmetic unit (Arithmetic and Logic Uni).
t) Connected to 1504 and accumulator 1505 to transfer and process data. Crystal oscillator 19 and oscillator 151
7, Timer 1516 makes the clock necessary for the processing of CPU15. LCD control / driver 1515 is data memory 1
LCD display for specific data stored in 514
It is a control / driver circuit for displaying on 16.

First, the reception operation will be described.

When the decoder 13 detects a signal that matches the paging number written in the ROM 14, it generates a paging detection signal A and, at the same time, sends a reception signal B following the paging number and a synchronization signal C synchronized with the reception signal to the CPU 15. CPU
15 receives the reception signal B that continues at the timing of the synchronization signal C through the input port 1507 as message information,
The data is stored in the data memory 1514, and the display signal E is output to the LCD display 16 through the LCD control / driver 1515. C
At the same time, the PU 15 sends a sound signal D to the driver 17 through the output port 1511 to cause the speaker 18 to sound. Ringing and LC
Reset button 20
At input port 1513.

Next, the transmission operation will be described.

The transmission data input is input from the data input switch unit 21, is temporarily stored in the data memory 1514 through the input port 1512, and is also displayed on the LCD display 16 through the LCD control / driver 1515. After completing the data input,
When a transmission operation is performed by the data input switch unit 21,
The transmission request signal J and the paging call request signal K encoded from the input transmission data are sent to the transmission unit 22 through the output port 1510.

Next, a specific data input means will be described with reference to FIG. The data input section includes a mode switching button 211, a data input button 212 and numbers as shown in the figure.
It is composed of a group of 10 input buttons 213 with letters attached. In the input button group 213, the “0-9” button is for inputting numbers 0 to 9, and the “A” button is for inputting the character of the A line.

When requesting a call, the mode switching button 211 is first pressed to switch from the normal mode to the sending mode.
At this time, the transmission data can be input, and the data is input by the group of 10 input buttons 213. First, the paging number input state is entered, and “0-
By pressing the 9 "button the number of times you want to input, 1
→ 2 → 3 → 4 → ... is displayed on the LCD display 16. If the data input button 212 is pressed when the number to be input is displayed on the LCD display 16, the number is stored and the next digit input waiting state is entered. If you input the required number of digits in this way,
Next, the message input state is entered, and by pressing the button of the line of the character to be input (A line, K line, ...) in the input button group 213 several times, for example, A → I → U → E → O → A →
... are sequentially displayed on the LCD display 16. When the character to be input is displayed on the LCD display 16 in this way, if the data input button 212 is pressed, the character is stored and the next character input is awaited. After inputting the paging number and message to be called, the data input button 212 and the reset button 30 are pressed at the same time to perform the transmission operation,
Input data is transmitted as a paging call request signal. In addition, these two reception functions (normal mode),
If a memory function (data store mode) is added in addition to the transmission function (transmission mode), it can be used as a memo pad using the data input switch section.

Regarding the transmission power of the paging slave unit, as shown in FIG. 1, by arranging the paging master unit (at least as long as the receiving unit) at some intervals (for example, in the range of 1 Km), Since the paging call request signal is received through the paging base unit, the transmission power can be reduced. In addition, the paging call request signal itself can be transmitted in a short time, so the battery etc. can be small.

〔The invention's effect〕

As described above, according to the present invention, the calling communication from the paging slave unit to another paging slave unit can be performed, and the confirmation of the calling can be performed in the calling paging slave unit. Two-way communication is possible. In particular, the feature of being able to obtain a large number of subscribers per frequency, which is the greatest advantage of the paging system, can be utilized as it is, and the required frequencies are only two waves for the paging signal and the paging call request signal.
An inexpensive system can be realized compared to car phones and MCA.
Furthermore, even a single paging slave unit requires only a short time (for example, about 1 second) to send out a paging call request signal, so the battery, circuit, etc. can be small, and it is much smaller than other two-way communication devices. There is an effect that you can.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the paging system of the present invention, and FIG. 2 is a diagram showing an example of signals used in the present invention.
FIG. 3 is a diagram showing an example of the configuration of a paging slave unit used in the present invention, FIG. 4 is a detailed configuration diagram of the CPU 15 of FIG. 3, and FIG.
The figure is an external view of a paging cordless handset used in the present invention. In the figure, 1a, 1b: Paging slave unit, 2a, 2b, 2c: Transmitting unit of paging master unit, 3a, 3b, 3c: Receiving unit of paging master unit, 4a, 4b, 4c:
Antenna, 5: Paging encoder device, 6: Paging call receiving device, 7: Switch, 8: Telephone.

Claims (3)

[Claims] 1. A paging slave unit having paging signal receiving means and means for inputting desired paging number and message information, and means for transmitting the desired paging number and message information together with its own paging number as a call request signal. And a means for transmitting a paging signal to the paging slave, a means for receiving a call request signal from the paging slave, and the paging number and message for the paging slave based on the received information. And a paging base station having means for transmitting the paging number and the confirmation signal to the paging slave unit at substantially the same time and as the paging signal at the same frequency, and the paging signal and the paging request signal use different radio channels. Between paging cordless handsets characterized by using Paging system with Shin possible message. 2. The paging system according to claim 1, wherein there are a plurality of call request signal receiving means from the paging slave unit of the paging base station, and the paging base station has a plurality of receiving means. A paging system with a message capable of communicating between paging cordless handsets having a function of processing the call request signal received by the above as a single call request signal. 3. A paging system according to claim 1, wherein a code having a bit error detecting function is used for a call request signal from said paging slave unit, and a call request signal receiving means of said paging base station. Is a paging system with a message capable of communicating between paging slave units, which has the bit error detection function and has a function of canceling the call request signal when there is a certain number of bit errors.