JPH0137013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a wireless selective calling receiver that receives its own selective calling signal and activates a calling alarm; The present invention relates to a wireless selective calling receiver with a display function that displays a call by activating it 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 or stolen. Further, the wireless selective calling service of this wireless selective calling receiver is normally provided by the user paying a monthly fee to the service company, for example. in this case,
If the user fails to pay the usage fee,
The base station can stop the service by deleting the user's subscriber number from the subscriber registration, but 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 problems, and an object of the present invention is to provide a radio selective calling receiver that stops its receiving function when a predetermined signal is received after receiving a selective calling signal. .

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

Further, in the present invention, when a predetermined signal is received after receiving the selective call signal, the receiving function is stopped and a predetermined message is displayed on the display,
It is an object of the present invention to provide a wireless selective calling receiver with a display function that maintains this display.

Hereinafter, the present invention will be explained in detail using drawings of embodiments. FIG. 1 is a diagram showing one example of the structure of a received signal. In FIG. 1a, P indicates a prefix signal, F a frame synchronization signal, N a selective call signal, and I a message signal. The length of the message signal I can be longer than one message length if necessary;
Multiple versions are arranged like the BD section of .

FIGS. 1b and 1c show examples of the structure of the selective call signal N and message signal I, respectively, in which one parity bit is added to the BCH (31, 21) code.
This signal consists of 21 bits of information bit INF, 10 bits of check bit CK and 1 bit of even parity EP, and one word is 32 bits.
One most significant digit (MSB) of the information bits INF is used to distinguish between selective call signal N and message signal I, and the remaining 20 bits are used as subscriber number information or message information. The message information shown in Figure 1c uses BCD numbers (4 bits) and can send up to 5 digits in one word. Further, the message information is sent out from the least significant digit (LSB), and when the message information is 6 to 10 digits, one more word message signal is added and sent out in two words.

Note that the specific codes used in this embodiment, such as the loss code, theft code, and the service stop code, use a signal in which the most significant digit (MSB) of the subscriber number, that is, the information bit INF, is "0". In this case, the normal subscriber number uses only 1 to 999999 out of 1048575, which is the maximum capacity of 20 bits, and the specific code uses a number of 1000000 or more.
A specific code and a subscriber number can be clearly distinguished. Furthermore, since the wireless selective calling receiver can receive a specific code only after receiving its own selective calling number, that is, the subscriber number, there is no malfunction caused by the specific code.

FIG. 2 is a block diagram of an embodiment of a wireless selective calling receiver according to the present invention. A radio signal received by antenna 1 is amplified and demodulated by radio section 2 . 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 uses a writable read-only memory (Programmable-Red Only Memory: P-
ROM) 5 and the signal from the waveform shaping circuit 3 are compared, and when the two match, the call number is pre-written in the ROM) 5, and when the two match, the call number is notified of the call.
A sound signal is supplied to the amplifier 6 to drive the speaker 7. The decoder 4 also decodes the message signal following the selective calling number N and drives a 7-segment liquid crystal display (LCD) 8 to provide visible information to the receiver holder. The reset switch 9 is connected to the decoder 4,
Stops the sound, stops the LCD 8 display, starts up, etc. A 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 (CPU). A series of operation commands are written in the program memory 401 as a decoder, and the contents of the address corresponding to the program counter 402 are output to the control section 403. Based on this contents, the control section 403 sends control signals to each section. program counter 40
2, the contents of the program memory 401 are stored in the control unit 40.
Normally, it is incremented by +1 each time it is sent to 3, but if there is a jump command, etc., it is followed. The interface between the external circuit and the data bus 408 is output port a404, input port b405, and output port c4.
06, through the input port d407. Output port a404 sends a sound signal, input port b4
05 reads data from the waveform shaping circuit 3 and reads the state of the reset switch 9, the output port c406 sends out read pulses from the P-ROM 5, and the input port d407 reads data from the P-ROM 5. Furthermore, data bus 408
are the program counter 402 and the data memory 40.
9. Accumulator 410, arithmetic unit (ALU) 411
It is also connected to perform data transfer. The data memory 409 is used for each flag, a message memory, a work area during calculation, and the like. In addition,
A synchronizing clock signal necessary for reading data from the waveform shaping circuit 3 is provided by a crystal oscillator 10 and an oscillating section 41.
3, produced by timer 412. LCD
The control/driver 414 is the data memory 4
Specific data stored in 09
This is for displaying on the LCD 8.

FIG. 4 is a diagram showing an example of display on the LCD 8. Figure 4a is an example of a normal message display, Figure 4b is an example of displaying message information in case of loss, such as contact information,
FIG. 4c shows an example of message information, such as a payment request display, when the service is stopped. Note that in the event of theft, no display will be displayed and only a sound will be output. Here, Fig. 4a
The number “1” at the left end of the symbol indicates that the message being displayed is the newest message (Patent application 1983-
206862).

Next, the operation of the receiver after receiving the calling signal will be explained in detail with reference to the flowchart shown in 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, it is checked whether there is an error in this received data (103), and if there is no error, it jumps directly to step 106, and if there is an error, it is checked whether the error is only one bit (104). ), if the error is only 1 bit, perform 1-bit error correction (105) and go to step (106); if the error is 2 or more bits, return to the initial state, that is, receive the signal of the selective calling number (101).
Return to In step 106, MBS1 of the received data is
It is determined whether the bit is "1" (message information) or "0" (calling number or specific code), and if it is "1", it enters operation to receive another word of signal (107), and "0" (call number or specific code). ”, the type of special code of the present invention is determined in steps 201 to 207, 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 way 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 when
Bit error correction (110) and received data
Check whether the MSB1 bit is "1" or "0" (111). MSB1 bit of received data is “1”
If so, the data (message information) received in steps 102 and 107 is stored as a maximum 10-digit message in the data memory 409 of the decoder 4 (112), and if it is "0", the data (message information) received in step 102 is stored as a message of maximum 10 digits (112). Only the calling number) is stored in the data memory 409 as a message of maximum 5 digits (113). After storing the received data in the data memory 409 in this manner, a sound is activated to start sounding (114), and the message stored in the data memory 409 is displayed on the LCD 8 (115). Then, until reset switch 9 is pressed,
The ringing and message display continue (116), and when the reset switch 9 is pressed, the ringing is stopped and the message display is erased (117), and the signal of the selective calling number, which is the first state, is received (101). Return to

Next, the flow when the MSB1 bit is "0" in step 106 will be explained. First, step
It is checked whether the code received at 102 is a lost code (201), and if it is a lost code, an additional 2
A word signal reception operation is performed (202), and the received information is displayed as a telephone number on the LCD 8 with the word "CALL" attached, as shown in FIG. 4b (203). This display continues until the power is turned off. Here, the two-word telephone number can be exactly the same as the message signal, and the processing is also as follows:
One-bit error correction as in steps 103 to 105 may be included, and if there are two or more errors 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, it is next checked to see if it is a service outage code (204), and if it is a service outage code, then the code is checked as shown in Figure 4c.
The words “PAY FEE” are displayed on the LCD 8 (205). This display continues until the power is turned off.
Reception operation stops. At step 204, step
If the code received at 102 is not a service stop code, it is finally checked to see if it is a stolen code (206), and if it is a stolen code, only a beep is generated (207), and this beep causes the power to be turned off. The reception operation will continue until the reception operation stops.

Here, the display of "CALLXXXX" on the LCD 8 when a discard code is received means that the person who threw away this receiver should call the telephone number XXXX, and if a service discontinuation code is received. LCD8 “PAYFEE”
The display means that the service company has suspended the service due to non-payment of the user's usage fee, so the user is urged to pay the usage fee as soon as possible. It is meant to draw attention to people around you and to draw attention to others.

Here, since the LCD 8 is a 7-segment display, the display is limited, but if a dot matrix display is used, even more detailed display of all alphabetic characters, kanji, etc. is possible. The effect of the sound when receiving the theft code is increased by making the volume louder than the sound when only receiving the own selective call signal. In addition, some recent non-selective call receivers are able to reduce current consumption and do not have a power switch, 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 reception function is stopped, or the reception function is stopped and a notification to the effect that the reception function has been stopped is provided. It is effective in preventing theft, and can also be used to claim unpaid usage fees.

[Brief explanation of drawings]

Figure 1 shows an example of the signal configuration used in the present invention,
FIG. 1a shows an example of the overall signal configuration, FIG. 1b shows an example of a selective call signal, and FIG. 1c shows an example of a message signal. FIG. 2 is a block diagram showing one embodiment of a radio selective calling receiver according to the present invention. FIG. 3 is a block diagram showing details of the decoder 4 of FIG. 2. Figure 4 is similar to Figure 2.
4A shows an example of the display of general message information, FIG. 4B shows an example of the message information when the powder is lost, and FIG. 4C shows an example of the 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...P-ROM, 6
...Amplifier, 7...Speaker, 8...LCD, 9
... Reset switch, 10 ... Mode changeover switch, 11 ... Crystal oscillator, 401 ... Program memory, 402 ... Program counter, 40
3...control unit, 44...output port, 405...
Input port, 406... Output port, 407...
Input port, 408...Data bus, 409...
Data memory, 410...Accumulator, 41
1...ALU, 412...Timer, 413...Oscillator, 414...LCD control/driver.

Claims (1)

[Scope of Claims] 1. In a wireless selective calling receiver that receives its own selective calling signal and activates a calling alarm, the receiving function is stopped when a predetermined signal is received after receiving the selective calling signal. 1. A radio selective call receiver, comprising means for causing the radio selective call receiver to perform a radio selective calling receiver. 2. In a wireless selective calling receiver that receives its own selective calling signal and activates a calling alarm, if a predetermined signal is received after receiving the selective calling signal, the receiving function is stopped and the calling alarm is activated. 1. A wireless selective call receiver, characterized in that it has means for activating and retaining a call alarm. 3. In a wireless selective calling receiver with a display function that receives a message signal following its own selective calling signal, activates a calling alarm, and displays the message signal on a display to display a calling signal, the selective calling receiver A wireless selection device with a display function, characterized in that it has a means for stopping the reception function and displaying a predetermined message on the display device when a predetermined signal is received after receiving a signal, and for holding this display. Call receiver.