JPH07107531A - Data transmission method - Google Patents

Abstract

PURPOSE:To provide a data transmission method for calling a party at any prescribed place and transmitting a message by using weak radio waves or the like. CONSTITUTION:A data transmission system is composed of a radio transmitter and a receiver 10 equipped with a pager function for receiving radio waves A from the radio transmitter for calling inside a department store or the like, the receiver 10 is provided with an antenna 11, receiver 12 for receiving radio waves at a specified frequency, CPU 13 for controlling respective parts, EEPROM 14 for storing an identification(ID) code and a caller code, recorder 15, changeover switch(SW) 16, amplifier 17, speaker 18, SW 19 and power unit 20 or the like, correspondent identification data are retrieved and transmitted by a button dedicated to a caller at the radio transmitter for calling and when the receiver 10 receives data matched with it's own ID code and the caller code and those data are non-received data, the received data are recorded in the recorder 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission method, and more particularly to a data transmission method using specific low power, weak radio waves and the like.

[0002]

2. Description of the Related Art With the recent development of motorization, the need for computerization of automobiles is increasing. Although the informationization of automobiles using the existing communication systems such as automobiles / cell phones and MCA systems has already progressed rapidly, more recently, it has become more advanced for road vehicles such as road traffic information communication systems and navigation systems. Systems are being developed. The road traffic information communication system is a system that provides information about route information such as position information, traffic information, and garage information.

[0003]

By the way, such a road traffic information system communicates public information such as position information and traffic information over a wide area, and a relatively narrow range is individually set as a service area. Information is not transmitted.

Further, the service area is set in a relatively narrow range, and there is a pager or the like installed in a store such as a department store, but there is a drawback that the equipment on the premises is large. In addition, there is a problem that it only outputs the ringing tone or the calling message No.,
It was difficult to convey the information to the other person easily.

Further, since the road traffic information system communicates public information such as location information and traffic information over a wide area, it cannot know personal location information. For example, in a large parking lot, the location of one's own parked car may not be known, but there is no effective method in such a case.

[0006] Therefore, an object of the present invention is to provide a data transmission method capable of calling a partner at a predetermined place and transmitting a message by using a weak radio wave or the like.

[0007]

The invention according to claim 1 is
In order to achieve the above object, in a data transmission method including a receiving device that receives a radio wave transmitted from a transmitting device that transmits data including identification data by radio wave, it is determined that data matching the self identification data is received. However, when it is determined that the data matching the identification data of the self is received, the data corresponding to the received radio wave is stored, and the data corresponding to the received radio wave and the stored data are output. (Voice or display).

According to a second aspect of the present invention, there is provided a data transmission method comprising: a receiving device that receives a radio wave transmitted from a transmitting device that transmits data including identification data by a radio wave.
When it is determined that it is the data that matches its own identification data and that it is unreceived data, and if it is determined that it matches its own identification data and that unreceived data is received, it responds to the received radio wave. The data is stored (for example, recorded in a recording unit), and the data corresponding to the received radio wave and the stored data are output (voice or display).

The data including the identification data may be voice data as described in claim 3, for example.

The identification data may be a code for identifying the receiving device, as described in claim 4, for example.

The identification data may be a code for identifying the number of times of calling operation to the receiving device, as described in claim 5, for example.

For example, the transmitting device may perform an input for designating the receiving device and retrieve the corresponding identification data by the input.

[0013]

According to the invention described in claims 1, 2, 3, 4, 5, and 6, first, when the transmitting device specifies a receiving device to which data is to be transmitted by input, corresponding identification data is searched, and the transmitting device transmits the identification data. Data including identification data is transmitted by radio waves of a specific frequency.

In this state, for example, when a receiving device carried by a person receives a radio wave of a specific frequency, the discriminating means discriminates that the data coincides with its own identifying data and is unreceived data. Then, when it is determined that the identification data matches the identification data of the self and unreceived data is received, the data is stored (for example, recorded in the recorder), and the stored data is output as voice. It

Therefore, it is possible to call the other party at a predetermined place by using a weak radio wave or the like, and to message the message.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS.

First Embodiment FIGS. 1 to 7 are views showing a first embodiment of a data transmission method. This embodiment is used as a data transmission method in a portable radio transmitter / receiver, and is used by a store clerk at a department store or the like. This is an example applied to a wireless transmission / reception device that can be called easily.

First, the structure will be described. FIG. 1 is a block diagram showing the overall configuration of a portable wireless receiving device, and FIG. 2 is a block diagram showing the overall configuration of a calling wireless transmitting device. In FIG. 1, the receiving device 10 is a receiver (radio) having a pager function capable of receiving the radio wave A from the calling wireless transmission device 30 (see FIG. 2) in a premises such as a department store. , Antenna 11, receiver (reception circuit) 12, CPU (Central Processing Uni
t) 13, EEPROM (Electrical Erasable Programm)
able ROM) 14, recorder 15, changeover switch (SW)
16, amplifier 17, speaker 18, switch (SW) 1
9 and the power supply device 20.

The power supply device 20 converts an external power supply or a power supply from a battery (not shown) into a predetermined voltage and supplies it to each part of the receiving device 10. The power supply device 20 includes a CPU
The control signal from 13 is input, and the power supply device 20 starts and stops the supply of power by this control signal, in particular, starts and stops the supply of power to the receiver 12 and the amplifier 17.

The antenna 11 receives a received radio wave including a call signal and a voice signal in a predetermined frequency band with the radio transmitter 30 for a call installed in a premises such as a department store, and the received radio wave is a receiver. Output to 12.

The receiver 12 is composed of a tuner, a detector, and the like, and the received radio wave received by the antenna 12 is tuned to a radio wave of a predetermined frequency by the tuner to take out a signal of a frequency of a predetermined channel. When the tuner 12 takes out the signal of the frequency of the specific channel with the tuner, it demodulates and detects it with a wave detector or the like, extracts a predetermined signal, and outputs it to the recorder 15 and the changeover switch (S
W) 16 to output to the amplifier 17.

The amplifier 17 is composed of an amplifier that amplifies the audio output so that the speaker 18 can emit the sound, and its control circuit. The amplifier 17 and the speaker 18
Constitutes an output means for outputting (sound or displaying) the received data.

The CPU (control circuit) 13 includes a microprocessor, a ROM (Read Only Memory), and a RAM (Rand).
In the ROM, a program as the receiving device 10, a selectable channel number, a frequency corresponding to the channel number, and the like are stored. The RAM is used as a work memory, and the microprocessor controls each unit of the receiving device 10 according to the program in the ROM to function as the receiving device 10. The frequency of the radio wave corresponding to each channel is stored in advance in the ROM in the CPU 13.
13 executes reception processing according to a reception processing program, which will be described later, stored in the ROM and turns on the receiver 12.
ON / OFF control, and a changeover switch (S
W) Recording and calling processing is performed by the pager side / voice recorder side switching designation by 16).

The CPU (control circuit) 13 constitutes a discriminating means for discriminating that the data matching the self-identification data has been received.

The EEPROM 14 stores the identification (ID) code and caller code assigned to the receiving device 10 for realizing the calling function. Especially, EEPROM
A code for each caller is written in 14.

The recorder 15 uses a pseudo SRAM having a capacity of, for example, 1 Mbit, which is composed of a voice memory and developed exclusively for voice storage, and stores voice data as recorded data. The recorder 15 enters a read / write mode in response to a read / write (R / W) signal from the CPU 13 and reads / writes to a predetermined address by addressing.

An ADPCM (Adaptive Differential Pulse Code Modul) is used as a memory for accumulating voice data.
ation: An LSI using the adaptive difference PCM method may be used. If an ADPCM LSI is used and the sampling frequency is set to 8 kHz, for example, a long recording time (about 30 seconds) becomes possible.

The switch (SW) 16 is for the pager side /
The switch (SW) 19 is a switch for designating switching on the voice recorder side, and can turn on / off the power of the receiving device 10. Switch (SW)
Reference numeral 16 designates a voice recorder and a call function, and outputs a recording signal from the recorder 15 to the amplifier 17.

In FIG. 2, a calling radio transmitter 30 is provided.
Is a transmitter installed in a premises such as a department store and capable of transmitting a radio wave of a specific frequency (for example, a specific low-power radio wave), and the calling wireless transmission device 30 includes an antenna 31, a transmitter (transmission circuit) 32, CPU33, EEPROM34,
Caller-only button 35, memory 36, microphone 37, A / D
The converter 38, the D / A converter 39, the OR circuit 40, the power supply device 41, etc. are provided.

The power supply device 41 converts the power from the AC 100V external power supply into a predetermined voltage and supplies it to each part of the calling wireless transmission device 30.

The antenna 31 transmits a transmission signal including a ringing signal and a voice signal in a transmission radio frequency (RF) frequency band to the receiving device 10 carried in a premises such as a department store. When a transmission signal is input from the CPU 33, the transmitter 32 transmits from the antenna 31 in a transmission frequency band set by a synthesizer (not shown). The transmitter 32 of the present embodiment has a function of transmitting data by radio waves of a specific frequency, and for example, a specific low power wireless station (operating frequency band: 400 MHz, 1.2 GHz band, which does not require a license of a wireless station,
Antenna power: 10 mW or less, communication range: 100-2
00 m or less) can be used.

The CPU (control circuit) 33 is composed of a microprocessor, a ROM, a RAM and the like, and the ROM corresponds to the program as the calling wireless transmission device 30 and the number of selectable channels and the channel numbers thereof. The frequency and the like are stored. The RAM is used as a work memory, and the microprocessor controls each unit of the calling wireless transmission device 30 according to the program in the ROM to function as the calling wireless transmission device 30. The frequency of the radio wave corresponding to each channel is stored in advance in the ROM in the CPU 33.
Executes a transmission process according to a transmission process program, which will be described later, stored in the ROM and turns on / off the transmitter 32.
The FF control is performed and the recording process is performed.

The EEPROM 34 stores an identification (ID) code and a caller code assigned to the calling wireless transmission device 30 for realizing the calling function.

The caller-only button 35 is a key for designating a caller, and a caller code (see FIG. 3) is set for each of a plurality of callers. A code is input and the instruction of each key is output to the CPU 33.

The memory 36 uses a pseudo SRAM having a capacity of, for example, 1 Mbit developed exclusively for voice storage, and stores the caller code together with voice data as recorded data.

The A / D converter 38 amplifies the audio signal input from the microphone 37, converts it into a digital signal that can be stored in the audio memory 36, and outputs it to the audio memory 36.

The D / A converter 39 converts the audio data read from the memory 36 into an analog signal, amplifies it, and outputs it to the OR circuit 40.

FIG. 3 is a diagram showing a table written in the memory 36 together with voice data. As shown in the figure, the memory 36 stores voice data as well as a caller code (ID code) corresponding to the caller-specific button 35, a serial number, and the number of times of transmission in the form of a table. For example,
The button "01" of the caller-only button 35 is set to "Sato", and the ID code "○○○○" is set. The serial number No is a call operation number code (serial number) added after the pager code for preventing duplicate reception, and is called during a certain time t1 (FIG. 4) and thereafter deleted from the memory 36. .

Next, the operation of this embodiment will be described.

FIG. 4 is a timing chart showing the relationship between the receiving device 10 and the calling radio transmitting device 30.
In this figure, the receiver 10 with pager code “8” is
This is an example of calling by the calling wireless transmission device 30.

When the receiver 10 having the pager code "8" is called, the voice is input by the microphone 37 while pressing the corresponding caller button of the caller-dedicated button 35 of the call wireless transmitter 30. This automatically retrieves the pre-specified caller code and EEPR
The pager code is taken out from the OM 34 and written in the memory 36 together with the voice.

At this time, as shown in FIG. 4, the serial number No for preventing duplicate reception is added after the pager code and the memory 3 is added.
Store in 6. The content stored in the memory 36 is recalled during a certain time t1 (for example, one hour) as shown in FIG. 4, and thereafter, is erased from the memory 36. Here, since the receiver 10 having the pager code “8” is focused on, “Voice 1” and “Voice 2” are called during the fixed time t1.

Next, on the side of the receiver 10 for the pager code "8", the following operation is performed by identifying the code for each caller written in the EEPROM 14.

Here, if the receiving circuit (receiver 12) of the receiving device 10 is kept in a receivable state at all times, the built-in battery will be exhausted immediately. Therefore, the CPU 13 executes the receiving control shown in FIG. Sampling regularly,
Only during sampling, the receiving circuit (receiver 12) is energized to receive radio waves. The signal A in FIG. 1 is a sampling signal, and when the received signal has its own code (ID code), the CPU 13 outputs a control signal to the recorder 15 as shown in signal A in FIG. Turn on 15 to write voice. At this time, it is checked whether or not it is the previously called serial number, and if (pager code + serial number) is the same data, it is ignored. That is, the called receiving device 10 determines whether it is the operation number code (serial number) received in the past with its own pager code, and if it is an unreceived code, the subsequent voice is recorded in the recorder 15. Recording is performed, and after the recording is completed, the receiving device 10 sounds “beep beep” as a confirmation sound. If it has been received, it is ignored.

As described above, a plurality of messages can be recorded by the same receiving device 10. In addition, the receiving device 1
Since it is not necessary to install a transmitter at 0, the cost can be reduced and the power consumption can be reduced for a long time.

The recording / transmitting operation in the calling wireless transmitter 30 and the receiving operation in the receiver 10 will be described in more detail below with reference to the flows shown in FIGS.

FIG. 5 is a flow chart of a recording process in the calling radio transmitter 30.

In FIG. 5, first, in step S11, it is determined whether or not there is a personal name input by pressing the caller-dedicated button 35. If no personal name is input, the process returns to step S11 to wait for the personal name input, and a personal name is input. Then, in step S12, the ID code for inputting the person's name is searched.

Then, in step S13, the serial number No stored in the memory 36 is incremented to a new serial number (serial number No ← serial number + 1), and step S14
Write the ID code and serial number in the memory 36. Next, in step S15, the voice is written in the memory 36, and it is determined in step S16 whether or not the caller-dedicated button 35 is turned off. If the caller-dedicated button 35 is not turned off, it is determined that recording is in progress and the process proceeds to step S15. After returning, the recording is continued, and when the caller-only button 35 is turned off, it is determined that the recording is completed, and the present flow is ended.

As described above, the radio transmitter 30 for calling is provided with the caller-dedicated button 35, and the voice code is input from the microphone 37 while pressing the corresponding caller button, whereby the caller code specified in advance is obtained. Serial number No
Is written in the memory 36 together with the voice.

FIG. 6 is a flow chart of a transmission process in the radio calling device 30 for calling.

When the main switch is turned on, this flow starts. First, in step S21, it is determined whether or not there is data in the memory 36. If there is data in the memory 36, the ID code and serial number are set in step S22. Call. Next, the ID code and serial number that were called in step S23
Is transmitted by the transmitter 32, and the memory 3 is transmitted in step S24.
The voice data stored in 6 is transmitted (see FIG. 4).

Next, in step S25, the number of times of transmission (timer) is incremented by 1, and in step S26, it is determined whether or not the number of times of transmission has reached the maximum number of times of transmission corresponding to a fixed time.
If the number of times of transmission is not the maximum, it is determined in step S27 whether or not there is other data in the memory 36. If there is other data, the process returns to step S22 and the ID code and serial number No. Data transmission is repeated until there is no data, and when there is no data, step S
Returning to step 21, it is determined whether or not there is data in the memory 36.

On the other hand, when the number of times of transmission reaches the maximum in step S26, the memory 36 is cleared in step S28 and the process proceeds to step S27.

FIG. 7 is a flowchart of the receiving process in the receiving device 10.

When the main switch is turned on, this flow starts. First, in step S31, it is determined whether or not n seconds have elapsed. If n seconds have not elapsed, wait until n seconds elapse, and if n seconds elapse, step In S32, the power of the receiver 12 is turned on.

Next, in step S33, it is determined whether or not there is received data, and if there is received data, step S34.
It is determined whether or not the ID codes match. When the ID codes match, it is determined in step S35 whether or not the received serial number No. match. If the received serial number No does not match, it is determined that the serial number No that was called previously is not found. Data reception (recording by the recorder 15) is performed in S36, the ID code and the received serial number are written in the memory in step S37, and the process proceeds to step S38.
If the received serial number matches in step S35, it is determined that the same data is received, and the process directly proceeds to step S38.

In step S38, the power source O of the receiver 12 is turned on.
After N, it is determined whether or not m seconds have elapsed. If m seconds have not elapsed, the process returns to step S33 to continue checking the received data, and when m seconds have elapsed, there is no received data even after a predetermined time has elapsed. Therefore, in order to save the power consumption, the power of the receiver 12 is turned off in step S39 and then step S31.
Return to.

As described above, according to the data transmission method of this embodiment, the receiving device 10 includes the calling radio transmitting device 30 and the calling radio transmitting device 3 in the premises of a department store or the like.
The receiving device 10 has a pager function capable of receiving the radio wave A from 0, and the receiving device 10 includes an antenna 1
1, a receiver 12 that receives radio waves of a specific frequency, a CPU 13 that controls each unit, an EEPROM 14 that stores an identification (ID) code and a caller code, a recorder 15, a changeover switch (SW) 16, an amplifier 17, a speaker 18, The wireless communication device 30 includes a switch (SW) 19 and a power supply device 20. The calling wireless transmission device 30 includes an antenna 31, a transmitter 32,
CPU 33, EEPROM 34, caller-only button 35,
A memory 36, a microphone 37, an A / D converter 38, a D / A converter 39, an OR circuit 40, a power supply device 41, and the like are provided, and the corresponding identification data is searched by the caller-dedicated button 35 of the call wireless transmission device 30. Then, when the receiving device 10 receives the data that matches the identification (ID) code and the caller code of the receiving device 10, if it is unreceived data, the recorder 15
Since it is designed to record the received data, it has an effect that it can be used as a message board in a premises such as a department store in addition to the normal pager function.

Further, in the present embodiment, since a transmitter is not required on the receiving device 10 side, it becomes possible to transmit a simple message by the private call radio by the dedicated calling device while realizing low power consumption. Further, since the duplicated serial number No code is checked to eliminate duplicated data, the battery effect on the receiving side can be further improved.

Second Embodiment FIGS. 8 to 13 are views showing a second embodiment of the data transmission method. In this embodiment, a data transmission method is installed in a mobile device, and a vehicle placed in a parking lot or the like can be easily installed. This is an example applied to a wireless transmission / reception device that can be searched for.

First, the structure will be described. FIG. 8 is a diagram showing an external appearance of a receiving device 40 carried by a person in a parking lot. In this figure, a main body 40a of the receiving device 40 has an LCD 41 for displaying a receiving sensitivity and a distance to the transmitting device, a receiving capability ( A sensitivity changeover switch 42 for setting (sensitivity) and switching display information, and a speaker 43 including a piezoelectric buzzer or the like for notifying an incoming radio wave are provided.

Since the wireless transmitter-receiver of this embodiment has the same structure as the wireless transmitter-receiver of the first embodiment, its repetitive description will be omitted. However, the transmitter of the wireless transmission device 30 of the present embodiment has a function of transmitting data by radio waves of a specific frequency, and for example, a specific low power wireless station (operating frequency band: 400 MHz, which does not require a license of the wireless station). 1.2 GHz band, antenna power: 10 mW or less, communicable distance: 100 to 200
m or less), and a limited range (100 m)
Only the radio waves can reach.

Further, the receiver 10 can detect the sensitivity of the received radio wave, and the distance to the transmitter 30 can be measured by the arithmetic processing (FIG. 12) by the CPU based on the detected sensitivity of the received radio wave.

Next, the operation of this embodiment will be described.

9 to 11 are system configuration diagrams showing an example of a data transmission method.

In FIG. 9, 50 is the radio transmitter 3
0 is a vehicle equipped with 0, and 51 is a driver carrying the receiver 10. Here, it is assumed that the car 50 is parked in a large parking lot and the car 50 can be easily found when returning later.

As shown in FIG. 10, the radio wave A is constantly transmitted from the wireless transmission device 30 installed in the automobile 50.
Since this radio wave A is a weak radio wave, it does not reach very far. A circle in the figure indicates a communicable distance of the radio wave A, that is, an area of sensitivity of the received radio wave.

Here, when the receiving device 10 enters the area A4 of the minimum sensitivity, the sound from the speaker 42 or the LCD is received.
The driver 51 is informed by the display of 41. At this time, for example, the area A4 of the minimum sensitivity from the driver 51
If it is about 100 m, it means that the automobile 50 is in that range. Next, the sensitivity of the receiver 12 is lowered by pressing the small button of the sensitivity changeover switch 42. Then,
When the reception area falls from A4 to A3, radio waves from the wireless transmission device 30 cannot be received. As a result, the driver 51 has his / her vehicle 50 in the reception area from A3 to A.
You can see that it is placed between 4. Thus, by varying the sensitivity, the target vehicle position (range) can be roughly predicted.

Next, FIG. 11 shows an example of the case where the receiver 12 of the receiver 10 is provided with directivity. As shown in FIG. 11, by giving the receiver 12 directivity, it becomes possible to predict the range and direction. For the message method such as distance or near or incorrect direction, LCD 41 in FIG.
A message to that effect can be displayed, and the volume of the speaker 43 and the length of the sound can be varied to easily notify.

The receiving operation of the receiving apparatus 10 will be described in more detail with reference to FIGS. 12 and 13.

FIG. 12 is a flowchart of the receiving process in the receiving device 10.

When the main switch is turned on, this flow starts. First, in step S41, the receiving sensitivity is set to the maximum, and in step S42 it is determined whether or not the ID code can be received. If the ID code cannot be received, Receiver 10
Is determined to be outside the receivable range, and LCD4 is displayed in step S43.
Display the range of “100 m or more” in 1 and step S41
Return to. When the ID code can be received, it is determined that the range is within the receivable range, and the range is displayed on the LCD 41 as "10" in step S44.
"Within 0 m" is displayed.

Next, in step S45, the receiving sensitivity is lowered by one step, and in step S46, it is determined whether or not the ID code can be received. When the ID code can be received, the distance is calculated based on the reception sensitivity in step S47, and the distance based on the reception sensitivity is displayed. Here, the distance is calculated based on the reception sensitivity, and the display is converted into this distance. Specifically, as shown in FIG. 13, the reception sensitivity is converted into the distance and the distance is subtracted from the maximum to the minimum display. To do.

Next, in step S48, it is determined whether or not the reception sensitivity has become the minimum. If the reception sensitivity has not become the minimum, the process returns to step S45 and the reception sensitivity is decreased by one step until the reception sensitivity becomes the minimum. The above process is repeated, and when the reception sensitivity becomes the minimum, the distance at this time is set as the final value and the present flow is ended while being displayed on the LCD 41.

As described above, in this embodiment, the distance is measured based on the reception sensitivity of the radio wave, and the distance data is displayed according to the measurement result. Therefore, the position of the automobile or the like equipped with the transmitter is measured. You can easily know the position of your car placed in the large parking lot.

In each of the above embodiments, the data transmission method is applied to a receiver carried by a person, but the present invention is not limited to this, and any data storage method for storing data transmitted by radio waves can be used. It goes without saying that it can be applied to such a system.

It goes without saying that the circuits and elements constituting the receiving device and the transmitting device, their types, etc. are not limited to those in the above-described embodiments.

[0079]

According to the first, second, third, fourth, fifth and sixth aspects of the present invention, a weak radio wave or the like can be used to call the other party at a predetermined place and a message can be transmitted.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a receiving device of a first embodiment of a data transmission method according to the present invention.

FIG. 2 is a configuration diagram of a transmission device of the data transmission method of the embodiment.

FIG. 3 is a table which is written together with audio data in a memory of the transmitter of the data transmission method of the embodiment.

FIG. 4 is a timing chart showing the relationship between the receiving device and the calling wireless transmission device of the data transmission method of the embodiment.

FIG. 5 is a flow chart of a recording process in the calling wireless transmitter of the data transmission method of the embodiment.

FIG. 6 is a flowchart of a transmission process in the calling wireless transmission device of the data transmission method according to the embodiment.

FIG. 7 is a flowchart of a receiving process in the receiving device of the data transmitting method of the embodiment.

FIG. 8 is an external view of a receiver of a second embodiment of the data transmission method according to the present invention.

FIG. 9 is a system configuration diagram showing an example of a data transmission method of the embodiment.

FIG. 10 is a system configuration diagram showing an example of a data transmission method of the same embodiment.

FIG. 11 is a system configuration diagram showing an example of a data transmission method of the embodiment.

FIG. 12 is a flowchart of a reception process in the reception device of the data transmission method of the embodiment.

FIG. 13 is a diagram showing a distance display example of the receiving device of the embodiment.

[Explanation of symbols]

 10 Receiver 11, 31 Antenna 12 Receiver 13, 33 CPU 14, 34 EEPROM 15 Recorder 16 Changeover Switch (SW) 17 Amplifier 18 Speaker 19 Switch (SW) 20 Power Supply 30 Calling Radio Transmitter 32 Transmitter 35 Call Buttons for people 36 Memory 37 Microphone

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04B 7/26 H04Q 7/16 7304-5K H04B 7/26 103 L

Claims (6)

[Claims] 1. A data transmission method comprising a receiving device for receiving radio waves transmitted from a transmitting device for transmitting data including identification data by radio waves, wherein it is determined that data matching its own identification data is received. When it is determined that the data matching the self identification data is received, the data corresponding to the received radio wave is stored, and the data corresponding to the received radio wave and the stored data are output. A data transmission method characterized by the above. 2. A data transmission method, comprising: a receiving device that receives radio waves transmitted from a transmitting device that transmits data including identification data by radio waves; and data that matches its own identification data and is unreceived data. If it is determined that there is a match, and if it is determined that unreceived data has been received, the data corresponding to the received radio wave is stored, and the data corresponding to the received radio wave is stored. And a data transmission method, wherein the stored data is output. 3. The data transmission method according to claim 1, wherein the data including the identification data is voice data. 4. The data transmission method according to claim 1, wherein the identification data is a code for identifying the receiving device. 5. The data transmission method according to claim 1, wherein the identification data is a code for identifying the number of calling operations for the receiving device. 6. The transmitting device according to claim 1, wherein the transmitting device receives an input for designating the receiving device, and searches for corresponding identification data by the input. Data transmission method.