JPS587094B2 - Musenkobetsukoshiyutsuhoshiki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wireless individual paging system that allows a called party to directly identify information about a calling party.

An individual selective calling receiver (hereinafter referred to as a receiver) is a device that, when a signal is sent from the sending side to call the other party, receives this signal and generates a ringing tone (alarm sound) to notify the calling party of the calling party. It is a device.

Conventionally, in this type of system, the signal sent from the transmitting side is only one piece of information for one receiver, and the receiver is also generally able to identify only one piece of information.

However, this makes it impossible to determine who called and for what purpose.

Even if the device is used exclusively for calling, this level of discrimination is still required.

In order to meet this requirement, there is a method in which the transmitting side sends out two or more different combinations of individual calling signals, and the receiving side identifies these two or more individual calling signals. There is a device in which two or more sets of elements for selecting different individual call signals are mounted in one receiver, and reception is performed while operating two or more detection circuits in parallel.

However, since this type of receiver is required to be miniaturized, it is not a good idea to implement two or more combinations of different selection elements in the receiver and perform reception operations in parallel, as this increases the mounting space. .

It is an object of the present invention to provide a selective calling scheme that conveys more than one piece of information.

Another object of the present invention is to provide a selective calling system with a compact selective calling receiver that identifies two or more pieces of information to be transmitted.

In the present invention, on the transmitting side, a signal train consisting of an individual paging signal and a subsequent information signal of a combination of signals corresponding to the information to be transmitted is transmitted, and on the receiving side, after receiving the individual paging signal, This is a selective calling method in which the information signal sent next is received and information corresponding to this information signal is displayed or a sound is generated.

Therefore, there is no need to mount two or more sets of selection elements for individual selection in the receiver as in the past, and the number of selection elements can be smaller than in the past, making it more compact than the conventional receiver. It is possible.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an individual selective calling receiver used in one embodiment of the present invention, FIG. 2 is a diagram showing a calling signal transmitted in one embodiment of the present invention, and FIG. If the receiver shown in Fig. 1 receives the calling signal shown in Fig. 2 (
However, this is a case where information about the calling party is also identified by the speaker.

) shows an example of the ringing tone generated in .

In FIG. 2, the transmitted paging signal is an individual paging signal A. for selecting a receiver. B. C. D. E. and signals for information transmission are F. G. Consisting of
The individual paging signal is a signal unique to the receiver to be called, and the subsequent two tone signals F. G is common to all receivers, and its presence or absence is combined to correspond to the information to be transmitted.

In this way, by transmitting the combination of presence/absence of multiple tone signals after the individual paging signal which is a combination of five tone signals, the individual selective paging receiver identifies and transmits the combination of tone signals after the individual paging signal. The purpose is to display different information depending on the information being displayed.

Next, the operation of this individual selective calling receiver will be explained with reference to the drawings.

When the receiver shown in FIG. 1 receives the calling signal shown in FIG. (Hereinafter, simply referred to as variable filter.

) 3, is detected by a tone detector 4, and is input to a shift register, that is, a storage circuit 5.

In the shift register 5, the first register 1 initially contains a logic 1, and the second and subsequent registers 2, 3, 4, etc. contain a logic O, and the output of the tone detector 4 changes the logic 1 one by one.
is shifted to the right register.

Further, the center frequency of the variable filter 3 is controlled by the output of the shift register 5, and if the first register 1 of the shift register 5 is logic 1, the center frequency of the variable filter 8 becomes equal to the first tone signal A. If the second register 2 of the shift register 5 is logic 1, the center frequency of the variable filter 3 will be equal to the tone signal B of the second wave.

Therefore, as described above, the shift register 5 is shifted to the right by the first wave tone signal A, and the register 2 becomes logic 1, and the center frequency of the variable filter 3 becomes equal to the second wave tone signal B.

Next, the second wave tone signal B passes through the variable filter 3, is detected by the tone detector 4, and is input to the shift register 5, where the contents of the register are shifted by one position to the right.

Then, the center frequency of the variable filter 3 becomes equal to the tone signal C of the eighth wave.

In this way, the following 1--tone signals C, D, E, F, G (
However, the logic 1 of the signal F is shifted to the shift register, that is, the first register 1 of the memory circuit 6.

The same applies to G. ) and are selectively received.

That is, shift registers 5 and 6 constitute a ring counter.

However, the fifth wave tone signal F causes the speaker 8 to generate a ringing tone.

After signal E, the presence or absence of tone signals F and G, that is, the contents of shift register 6, is supplied to display drive circuit 9, and the output drives display 10 to identify the information on the calling side.

Instead of this indicator, the speaker may be identified by changing the sound of the speaker.

The variable filter 8 is a band-pass filter with a narrow band, and its center frequency is switched in a predetermined order by the signals from the shift registers 5 and 6, so that, for example, tone signals A, B, D, If the order of the tone signals is different, such as G and F, or the tone signals have different frequencies, such as A, B, G, C, and E, the tone signals cannot pass through the variable filter 3, and the subsequent circuit does not operate. .

In this way, an individual receiver is selected by a combination of tone signals for individual calling.

In this way, by receiving tone signals A, B, C, D, and E, the receiver can know that it has been called.

Furthermore, the display 10 identifies the transmitted information based on the presence or absence of tones after F.

Here, an example of operation will be described in which information on the calling side is distinguished by the tone of the speaker.

A plurality of low frequency oscillation circuits (for example, the oscillation circuit 7 in FIG. 1 may be used) corresponding to each signal combination depending on the presence or absence of tone signals after the fifth wave tone signal E.

) to generate different ring tones.

For example, when the call signal shown in FIG. 2a is received, the shift registers 5 are sequentially shifted to the right, the first register in the shift register 6 becomes logic 1, and is no longer shifted.

Therefore, the first low frequency oscillation circuit is activated to generate the ringing tone shown in FIG. 3a.

Similarly, in the case of the ringing signal shown in FIG. 2b, the second register in the shift register 5 becomes logic 1 and is no longer shifted, and the second low frequency oscillation circuit operates to generate the ringing tone shown in FIG. 3b. When the ringing signal shown in FIG. 2C is generated, the third register in the shift register 6 becomes logic 1, and the low frequency oscillator circuit operates to generate the ringing tone shown in FIG. 3C.

By using tones that are not included in the individual selection signal as tones after F, it is possible to distinguish the start of the next calling signal without providing a time period in which no tone is sent at the end of the calling signal.

In this way, different ring tones are generated depending on the information to be transmitted.

As described above, according to the present invention, two or more pieces of information can be transmitted by a combination of an individual paging signal and a tone signal corresponding to the information, and one receiver can transmit different information depending on the information to be transmitted. generate a ringtone and identify the information.

For example, it is possible to distinguish between two or more predetermined subscribers or to identify two or more requirements.

Moreover, according to the present invention, it is possible to provide a receiver that is smaller than the conventional receiver in which two or more sets of individual evaluation signal selection elements are mounted.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an individual selective calling receiver used in one embodiment of the present invention, FIG. 2 is a diagram showing a calling signal received in one embodiment of the present invention, and FIG. , shows the ringing sound that occurs when the corresponding ringing signal shown in Fig. 2 is received by the receiver shown in Fig. 1 (however, the calling party's information is also identified by the speaker). It is something. 1... Antenna, 2... Receiving circuit, 3
...Variable filter, 4...Detection circuit,
5, 6...Shift register, 7...Oscillation circuit, 8...Speaker, 9...Display drive circuit, 10...Display device.

Claims (1)

[Claims] 1. In a wireless individual paging system, a detection circuit capable of sequentially detecting a transmitted signal string consisting of a selective paging signal and a subsequent information signal of a combination of signals corresponding to information on the calling side; a memory circuit that holds an output; a circuit that sequentially changes a signal to be detected in the detection circuit according to the contents of the memory circuit; and a circuit that displays or sounds information corresponding to the information signal based on the contents of the memory circuit. A wireless individual paging system including a generating circuit.