JPH036702B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to improvements in personal radios.

Conventional technology A personal radio uses one channel out of 80 channels provided every 25 KHz in the 903 MHz to 905 MHz band as a control channel;
79 channel is used as a call channel.
The control channel sends and receives control signals including a synchronization signal, a 5-digit group number set using the numeric keypad, the channel number of the call channel to be used, the ATlS code, etc., and the call channel sends and receives audio signals. ing.

By the way, when making a call using a personal radio, the calling party's personal radio first searches for an empty communication channel, then uses the control channel to send out the control signal described above, and then returns to the searched communication channel. It is used to generate audio signals. In addition, the personal radio device that receives the control signal compares the group number included in the control signal with its own group number set using the numeric keypad, and only when the comparison results match, a call using the channel number included in the control signal is made. It captures the channel. In other words, personal radios can communicate only between radios having the same group number set using the numeric keypad.

In this way, since personal radio devices can only communicate with other radio devices having the same group number, depending on how the group numbers are set, it may not be possible to make a conversation at all. To prevent this, when calling an unspecified number of personal radios, the group number "00000" is sent, and when responding to a call from an unspecified number of personal radios, the group number "00000" is sent. There is an agreement in place to set the By establishing such an arrangement, the above-mentioned inconvenience will be eliminated, but all personal radios set to the group number "00000" that have received a control signal containing the group number "00000" will not receive the control signal. Therefore, since the communication channel with the specified channel number is captured, even if another personal radio transmits a control signal containing the group number "00000" in the same area afterwards, this control signal will be received. I ended up not having a personal radio at all. Therefore, the current personal radio equipment has group number "00000".
If you are called, you must operate the press talk switch to start transmitting within 10 seconds, or press the hold button on the front panel of the personal radio to request continued reception. This is shaping up to be the end of the episode.

However, if you are not familiar with how to operate a radio, it is difficult to press the hold button within 10 seconds of receiving a call, and the problem is that the call may end even if you wish to continue receiving the call. It was hot. Particularly when a personal radio is mounted on a vehicle, the above-mentioned problems may occur frequently.

Problems to be Solved by the Invention The present invention has improved the above-mentioned drawbacks, and its purpose is to make it possible to reliably request continuation of reception when called with the group number "00000" with easy operation. It's about doing.

Means for Solving the Problems FIG. 1 is a block diagram of the present invention. Judgment means 10
0 determines whether the group number included in the received control signal is a specific group number when a communication channel is captured due to matching of group numbers, and the timer 101 determines whether the received control signal is If it is determined that the group number included in the signal is a specific group number, it operates for a predetermined period of time. The control means 102 continues capturing the communication channel if the numeric keypad 103 is pressed while the timer 101 is operating, and ends capturing the communication channel if the numeric keypad 103 is not pressed while the timer 101 is operating.

Embodiment FIG. 2 is a block diagram of an embodiment of the present invention, and FIG.
The figure is a perspective view showing the appearance of the personal radio. In Figure 2, 1 is a microprocessor;
2 is a memory, 3 is an operating section, 4 is an output section, 5 is an input section, 6 is a transmitting section, 7 is a switching section, 8 is an antenna, 9
10 is a receiver, 10 is a synthesizer, 11 is a microphone, 12 is a press talk switch, and 13 is a speaker. The operation unit 3 includes a numeric keypad 31, a squelch button 32, and a reset button 3, as shown in FIG.
3. A recall button 34 and a monitor button 35 are provided. Further, 36 is a group number display section, 37
is a volume knob, and 38 is a microphone connector.

Further, FIG. 4 is a flowchart showing part of the processing contents (capturing operation) of the microprocessor 1, and the operation of FIG. 2 will be explained below with reference to the same figure.

When the group number included in the control signal applied via the antenna 8, switching section 7, receiving section 9, and input section 5 matches the group number set by the numeric keypad 31, the microprocessor 1 starts the synthesizer 10. The communication channel specified by the control signal is captured (step S1), and then it is determined whether the pre-talk switch 12 is on (step S2). If the determination result in step S2 is YES, a transmission timer provided as software inside the microprocessor 1 is set (step S3), and thereafter each part of the apparatus is placed in a transmission state. If the determination result in step S2 is NO, it is determined whether the reset button 33 is on (step S4). The judgment result of step S4 is
If YES, the microprocessor 1 performs standby operations such as controlling the synthesizer 10 to capture the control channel (step S5), and the judgment result is
If NO, determine whether the group number included in the received control signal is "00000" (step
S6).

If the determination result in step S6 is NO, the microprocessor 1 compares the strength Vi of the received radio wave with a predetermined threshold value V, and determines whether Vi>V is satisfied (step S7). . If the determination result in step S7 is YES, a reception timer provided in software within the microprocessor 1 is set (step S8), and reception of the communication channel captured in step S1 is continued. Also,
If the judgment result in step S7 is NO, it is in an insensitive state;
That is, it is determined whether the state of Vi≦V continues for 30 seconds or more (step S9). If the judgment result in step S9 is NO, the process returns to step S2, and if the judgment result is YES, a standby operation such as controlling the synthesizer 10 to capture a control channel is performed (step S5).

Also, if the judgment result in step S6 is YES,
That is, when called by the group number "00000", it is determined whether at least one of the ten keys 31 has been pressed (step S10). If the judgment result in step S10 is YES, the microprocessor 1 sets a reception timer (step S8), and then returns to step S1.
Continuing to receive the captured communication channel. Furthermore, if the judgment result in step S10 is NO, it is judged whether 10 seconds have passed since the call channel was captured (step S11), and if the judgment result is YES, the standby operation is performed (step S5). , the judgment result is
If NO, the process returns to step S2.

In this way, according to this embodiment, when a call is made with the group number "00000", by pressing any of the numeric keys 31, it is possible to continue receiving the call channel captured in step S1. Furthermore, as can be seen from Figure 3, the numeric keypad 31 occupies a considerable area of the operating section, so it is easy to operate and it is possible to continue receiving the communication channel captured in step S1. It becomes possible to do so.

In the embodiment described above, the reception timer is set when any of the numeric keys 31 is pressed (step S10), but the reception timer is set only when a specific key is pressed. Of course, it is also possible to do so.

Effects of the Invention As explained above, the present invention determines whether the group number included in the control signal is a specific group number (“00000” in the embodiment) that calls an unspecified number of call parties. a timer that operates for a predetermined period of time if the determination means determines that the number is a specific group number; and a timer that continues to capture the call channel if the numeric keypad is pressed while the timer is operating; The device is equipped with a control means consisting of a microprocessor 1, a synthesizer 10, etc., which terminates the capture of the call channel if the numeric keypad is not pressed, and the numeric keypad is pressed even when a specific group number is called. As a result, it is possible to continue receiving the communication channel, so there is an advantage that the device can be configured more economically than a conventional personal radio which requires a hold button. Further, since the numeric keypad occupies a considerable area of the operation section, there is an advantage that the request for continuation of reception can be made reliably and easily. Therefore, it is particularly suitable if the present invention is applied to a personal radio for use in a vehicle.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a perspective view showing the external appearance of a personal radio, and FIG. 4 is a diagram showing the processing contents of the microprocessor 1. This is a flowchart showing a part of the process. 1 is a microprocessor, 2 is a memory, 3 is an operation section, 4 is an output section, 5 is an input section, 6 is a transmission section, 7
10 is a switching unit, 8 is an antenna, 9 is a receiving unit, 10 is a synthesizer, 11 is a microphone, 12 is a press talk switch, 13 is a speaker, 31, 103
is a numeric keypad, 32 is a squelch button, 33 is a reset button, 34 is a recall button, 35 is a monitor button, 36 is a group number display section, 37 is a volume knob, 38 is a microphone connector, 100 is a judgment means, 101 is a timer, 1
02 is a control means.

Claims (1)

[Claims] 1 Send and receive audio signals through the call channel, send and receive control signals including the group number and the channel number of the call channel to be used through the control channel, and set the group number included in the received control signal and the numeric keypad. If the group number matches, the personal radio device that captures the communication channel of the channel number included in the control signal,
When a call channel is captured due to a match between the group number included in the received control signal and the group number set by the numeric keypad, the group number included in the received control signal specifies that an unspecified number of call parties are to be called. A determination means for determining whether or not the group number is a group number; a timer that operates for a predetermined period when the determination means determines that the group number included in the received control signal is a specific group number; and an operation of the timer. control means for continuing to capture the communication channel when the numeric keypad is pressed during operation, and for terminating capture of the communication channel if the numeric keypad is not pressed during the operation of the timer. Characteristic personal radio equipment.