JPS6041827A - Radio selective call receiver - Google Patents

Abstract

PURPOSE:To prevent missing or theft of a radio equipment and also to attain the request of paying of unpaid charge by stopping a reception function when a prescribed signal is received after a selective call signal is received and allowing the equipment to recognize it as sound or visual information. CONSTITUTION:A reception signal from an antenna 1 is demodulated after being amplified at a radio section 2, and converted into a waveform possible for being read by a decoder 4 by means of a waveform shaping circuit 3. The decoder 4 controlled by a clock signal from a crystal oscillator 10 compares the own call number written in advance in a P-ROM5 with a signal from the waveform shaping circuit 3 and applies a ring signal to an amplifier in order to inform the calling when the both are coincident, a speaker 7 is driven to generate the ring tone and to drive a liquid crystal display 8 thereby giving visual information to a possessor of the receiver. Further, a reset switch 9 is connected to the decoder 4 to conduct the stop of the ring tone and display stop or start or the like of the display device 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a wireless selective calling receiver that receives a self-selective call signal, activates a call alarm, and receives a message signal following the self-selective call signal and activates a discharge alarm. The present invention relates to a wireless selective calling receiver with a display function that displays a call by activating a message signal and displaying a message signal on a display.

Conventionally, wireless selective calling receivers are small and portable, so they have the disadvantage of being easily lost and stolen. The wireless selective calling service is usually provided by the user paying a monthly usage fee to the service company.In this case, if the user fails to pay the usage fee, the base station Although it is possible to stop the service by deleting the user's subscriber number from the subscriber registration, the only way to notify the user of this is to contact the user by phone.

The present invention has been proposed in view of the above points, and an object of the present invention is to provide a radio selective calling receiver that stops the receiving function when a predetermined signal is received after receiving a selective calling signal. do.

Furthermore, the present invention provides a wireless selective calling receiver that stops the reception function, activates a calling alarm, and maintains the calling alarm when a predetermined signal is received after receiving the selective calling signal. The purpose is to

Furthermore, the present invention has a display function that stops the reception function and displays a predetermined message on the display when a predetermined signal is received after receiving the selective call signal, and maintains this display. An object of the present invention is to provide a wireless selective calling receiver.

Hereinafter, the present invention will be explained in detail with reference to the drawings of the embodiments. Fig. 1 is a diagram showing one example of the configuration of a received signal. Fig. 1 (a) signal, F is a frame synchronization signal, N is a selective call signal, and N is a message signal.The length of the message signal can be longer than l message length if necessary, and multiple arranged.

Figures 1(b) and 1(c) show the selective calling signal (5
), a configuration example of the message signal (1) is shown, and BCH (3
1,21) code with one parity bit added.

This signal consists of 21 bits of information (INF), 10 bits of check bit (CK) and 1 bit of even parity EP (Table 9.1) word 32 pits. (Information beep) One most significant digit (MSB) of INF is used to distinguish between selective call signal N and message signal, and the remaining two
0 pits are used as subscriber number information or message information. The message information in Figure 1 (C) is a BCD number (
4 bits) can be used to send up to 5 digits in words. Further, the message information is transmitted from the least significant digit (LSB), and when the message information is 6 to 10 digits, one more word is added and the message signal is transmitted in two words.

In addition, the lost code, which is a specific code used in this example,
The welding T code and the service stop code use a signal with the most significant digit (MSI3) of the subscriber number (information bit) INF being "no". In this case, the normal subscriber number is 20 bits. !Large capacity 1,048,575
Of these, only 1 to 999,999 are used, and the specific code uses a number of 1,000,000 or more, so that the specific code and the subscriber number can be clearly distinguished. Further, since the wireless selective calling receiver can receive a specific code only after receiving all of its own selective calling numbers, that is, all subscriber numbers, malfunctions due to specific codes are common.

FIG. 2 is a block diagram of an embodiment of a wireless selective calling receiver according to the present invention. The radio signal received by the antenna 1 is amplified by the radio section 2 and then sent to the radio section.

The demodulated signal is converted by the waveform shaping circuit 3 into a waveform that can be read by the decoder 4. The decoder 4 has a writable read-only memory (Program+able).
-Read Only Memory: P-ROM)
5, and the signal from the waveform shaping circuit 3 is compared, and when the two match, a ringing signal is supplied to the amplifier 6 to notify the user of the call, and the speaker 7 to drive. Further, the decoder 4 decodes the message signal following the selective call number N, and displays a 7-segment liquid crystal display (Liquid Crystal Display).
lay:LCD) 8 to provide visual information to the receiver holder. The reset switch 9 is connected to the decoder 4 and is used to stop the sound, stop and start the display on the LCD 8, etc. The fi5° crystal oscillator 10 is used to generate a clock signal for operating the decoder 4.

FIG. 3 is a block diagram showing details of the decoder 4. The decoder 4 is a one-chip central processing unit (Centra).
l Processing Unit: CPU)
It is.

A series of operating instructions as a decoder is written in the program memory 401, and the program counter 402
The content of the address corresponding to is output to the control unit 403, and based on this content, the control unit 403 sends a control signal to each unit. Program counter 402 is program memory 4
Each time the contents of 01 are sent to the control unit 403, it is normally incremented by +1, but if there is a jump command etc., it is followed.

The interface between the external circuit and the data bus 408 is performed by an output port a (404), an input port b (405), an output port c (406), and an input port d (407). Output port a (404) is used for sending a sound signal and for input port
) b (405) reads data from the waveform shaping circuit 3 and reads the state of the reset switch 9, output port c (406) sends out read pulses from the P-ROM 5,
Input port d (407) reads data from P-ROM5. Additionally, data bus 408 connects program counters 402 . Data memory 409. Akeem Lator 4
10. Arithemetic and Lo
gicUnit:ALU) 411 to transfer data. The data memory 409 is used for each flag, a message memory, a work area during calculation, and the like. Note that the clock signal for synchronization, which is not necessary for reading data from the waveform shaping circuit 3, is provided by the crystal oscillator 10 and the oscillation unit 41.
3. produced by timer 412. The LCD control/driver 414 is for displaying specific data among the data stored in the data memory 409 on the LCDB.

FIG. 4 is a diagram showing an example of display on the LCD 8. Figure 4 (a
l is an example of a normal message display, Figure 4 (t) l is an example of displaying message information in case of loss, such as contact information, Figure 4 (C
) is message information when the service is stopped, such as an example of a payment request display. Note that in the event of theft, no display will be displayed and only a sound will be output. Here, the leftmost number 111+ in FIG. 4(a)
+ indicates that the message being displayed is the newest message (Japanese Patent Application No. 57-206862).

Next, the operation of the receiver after receiving the calling signal will be explained in detail with reference to the flowchart of FIG.

First, the normal message call flow will be described.

After turning on the power and receiving a signal of its own selective calling number (101), the next one-word signal following this signal is received (102). Next, check whether there is an error in this received data (103), and if there is no error, jump directly to step 106, and if there is an error, check whether the error is only 1 bit (104).
If it is only 1 bit, perform 1 bit error correction (105
), the process goes to step (106), and if the error is 2 or more bits, the initial state, that is, receiving the signal of the selective calling number (1
Return to 01). In step 106, the MB of received data is
S1 bit is n I II (message information) or O
n (calling number or specific code).
If If, the operation starts to receive the l word signal (107), and if +OL1, steps 201 to 2 are performed.
At step 07, the type of special code of the present invention is determined and processing is performed according to the type. This will be explained in detail later. After receiving the 1-word signal in step 107, in exactly the same manner as steps 103 to 106 described above, the received data is checked for errors (108), the error is only 1 bit (109), and the error is 1 bit. 1-bit error correction (110), and the MSB 1 bit of the received data -
1" or 10 format (111). If the MsBt bit of the received data is 11111, the data (message information) received in step 102 and step 107 is sent to the decoder 4 as a message of maximum 10 digits.
If it is ol, only the data (calling number) received in step 102 is stored in the data memory 409 as a maximum 5-digit message (113). In this way, the data memory 4
After storing the data received in 09, activate the sound to start the sound (114), and display the message stored in the data memory 409 on the LCD 8 (115).
.

Then, the sound and message display continue until the reset switch 9 is pressed (116). When the reset switch 9 is pressed, the sound stops and the message display disappears (117), leaving the initial state of selection. Return to receiving the signal of the calling number @ (10), ).

Next, a description will be given of the enrollment when the M8Bt bit is Jl in step 106. First, it is checked whether the code received in step 102 is a lost code (step 102).
1), if it is a lost code, a two-word signal reception operation is performed (202), and the received information is used as a telephone number, and as shown in FIG. 4(b), "CALL" is sent.
l! : Displayed on LCD 8 with y/u characters (2
03), and this display continues until the power is turned off. Here, the 2-word telephone number may be exactly the same as the message signal, and the processing may include 1-bit error correction as in steps 103 to 105, where the error is 1-bit.
If there are two or more bits within one word, the process may return to step 101. In step 201, if the code received in step 102 is not a lost code, then it is checked (204) whether it is a Boobis deactivation code and if it is a service deactivation code, the process shown in FIG. 4(c) is performed. As shown, the characters IPAY FEEII are displayed on the LCD 8 (205).This display continues until the power is turned off, and the receiving operation stops.In step 204, the code received in step 102 is a service stop code. If it is, it is checked whether there is a proverbial code at the top (2).
06), and if it is a stolen code, only a sound will be generated (20
7) This sound continues until the power is turned off and the reception operation stops.

Here, ncAl, Lxx when receiving the lost code
xx" on the LCD 5 means that the person who connected this receiver should speak one whistle to the phone number xxxx, and the "PA
YFEB” is displayed on the LCD 8 to remind the user to quickly pay the usage fee as the service company has suspended the service due to non-payment of usage fee by the user. This is to warn the person who stole the item and to attract the attention of those around them.

Here, since the LCD 8 is a 7-segment display, the display is limited, but if a dot matrix display is used, it becomes possible to display all the letters of the alphabet, kanji, etc. in even more detail. The sound when a theft code is received is as follows:
The effect is enhanced by making the volume louder than the sound generated only when receiving the own selective call signal. In addition, recent wireless selective calling receivers are able to reduce current consumption, and some have large power switches, but in that case, the above display and sound will continue until the battery is removed, so in case of theft. is particularly effective.

According to the present invention, when a predetermined signal is received after receiving a selective call signal, the receiving function is stopped, and when a predetermined signal is received, the receiving function is stopped and a notification is sent to the effect that the receiving function has been stopped. It is effective in preventing loss and theft, and can also be used to claim unpaid usage fees.

[Brief explanation of drawings]

FIG. 1 shows an example of a signal configuration used in the present invention.
Figure 1(a) shows an example of the overall signal configuration, and Figure 1(b)
1 shows an example of a selective call signal, and FIG. 1 (C1 is a diagram showing an example of a message signal). FIG. The figure is a block diagram showing details of the decoder 4 in Fig. 2. Fig. 4 shows the LCD 8 in Fig. 2, and Fig. 4(a) shows the LCD 8 in Fig. 2.
4(b) shows an example of displaying general message information, and FIG.
) shows an example of message information at the time of loss, and Figure 4 (C
) shows an example of message information when the service is stopped. FIG. 5 is a flowchart showing the receiving operation, sounding operation, and displaying operation according to the present invention. 1... Antenna, 2... Radio section, 3... Waveform shaping circuit, 4... Decoder, 5... P40M, 6-...
Amplifier, 7...Speaker, 8...LCD, 9...
・Reset switch, 10...mode changeover switch,
DESCRIPTION OF SYMBOLS 11... Crystal oscillator, 401... Program memory, 402... Program counter, 403... Control unit, 404... Output port, 405... Input port, 406... Output port, 407 Kapo), 408
...Data bus, 409...Data memory, 410
...Accumulator, 411...ALU, 412.
...Timer, 413...Oscillator, 414...LCD
Control/Triver. (Le) (C) Figure 4

Claims (1)

[Scope of Claims] 1. A wireless selective calling receiver that receives its own selective calling signal and activates a calling alarm (in case a predetermined signal is received after receiving the selective calling signal); , a radio selective calling receiver, characterized in that it has a means for stopping the receiving function. 2. A radio selective calling receiver that receives its own selective calling signal and activates a calling alarm, in which the selective calling signal is received. 3. A wireless selective calling receiver, characterized in that it has means for stopping the receiving function, activating the calling alarm, and holding the calling alarm when a predetermined signal is received. 3. Self-selection. Receiving the selective calling signal in a wireless selective calling receiver with a display function that receives a message signal following the calling signal, activates a calling alarm, and displays the message signal on a display to display a calling signal. a radio selective calling receiver with a display function, further comprising means for stopping the reception function, displaying a predetermined message on the display, and holding this display when a predetermined signal is received; .