JPH0453077Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a receiving device that can receive control signals sent by a personal radio.

[Technical background of the invention and its problems]

Immediately after turning on the power, the personal radio enters standby mode and waits for commands from the operator via the control channel.

The operator determines whether to make a call request to call someone himself, a reception request to monitor and receive the communication channel, or to wait for someone to call him, and gives an instruction to the radio.

After the operator makes a decision in standby mode, the work shifts to the radio, and after performing various operations, it enters, for example, a talking state, and waits again for the operator's instructions, such as a request to send or a request to end the call. repeat.

Note that the control channel is used only for sending and receiving control signals (data signals), which will be described later.

As mentioned above, immediately after the power switch is turned on, the radio is in standby mode, i.e., when a call request is received from the operator,
Wait for a monitor request instruction or a decision as to whether to wait for an incoming call. Note that in this case, it is necessary to set some kind of group code in the radio device in advance.

When a call request is received from the operator, the radio enters the call operation from standby mode, searches for an empty channel, sends the channel number on the control channel (sends a control signal), and sends the signal to the other party. After transmitting the message, it starts the capture operation. When the acquisition operation is started, a message indicating that communication is possible is displayed on the wireless device, so if a transmission request is issued in response to this, the communication operation begins and the communication becomes possible.

When waiting for an incoming call, two group codes for incoming calls can be set at the same time. When receiving a control signal from someone's calling action, the radio checks whether the group code in it corresponds to one of the two group codes set for itself, and if it does not, it ignores the control signal. do. If applicable, the group code is memorized, the communication channel is entered, and the acquisition operation begins.

As shown in Figure 3a, the above control signals consist of a 50-bit bit synchronization signal, a 15-bit frame synchronization signal, and a 172-bit digital data signal for automatic line connection, and are MSK (minimum shift).
It is transmitted using F2 radio waves using the keying) method.

The contents of the digital data signal include a group code of 20 bits and a channel code of 8 bits, as shown in Figure 3b.
There is a total of 80 bits, 4 bits for the command code, and 48 bits for the calling name, which is different from the 172 bits mentioned above, but this difference is due to the result of Hagelberger code processing.

The group code is a 5-digit number converted into BCD.
The group code used here is a group code set in advance for transmission or a group code called at the time of reception. The channel codes are preliminary and are currently all 0. The calling name is a digitally encoded version of the name written on the driver's license.

The calling name, which is the last data of the control signal, is an identification code, and the control signal containing this is used in two cases in the control channel: calling operation and re-calling operation.
In the communication channel, the signal is sent in three cases: at the beginning and end of the transmission, and every minute during the transmission.

Note that the 48-bit data of the calling name issued by the control signal is written to the ROM cartridge at the time of license.

FIG. 2 shows the configuration of a conventional general personal radio. In the figure, a controller 1 reads a call name from an identification call name storage device 2 consisting of a ROM that stores identification call names, and reads a group code,
A control signal is created together with a channel code, and the control signal modulator/demodulator 3 converts this into an MSK wave. M.S.K.
The control signal in the form of a wave is sent out from the transmitter 4 via the switching means 5 and emitted by the antenna 6.

The personal radio device that receives the control signal emitted by another personal radio device through the antenna 6,
The signal is sent to the receiving section 7 and the modulation/demodulation section 3 via the switching means 5, and the modulation/demodulation section 3 demodulates it into a digital signal. The digital signal is read into control 1, where the group code therein is extracted. When the retrieved group code matches the set group code, the notification sound generation circuit 8 emits a notification sound and starts a call operation.

As mentioned above, conventional personal radios identify control signals by group codes, so they have the disadvantage that they can only identify the other party by group code after receiving a control signal. It was hot.

[Purpose of invention]

The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional devices, and provides a receiving device that can identify a control signal from a specific personal radio by using the calling name in the control signal. The purpose is to

[Example of idea]

Hereinafter, an embodiment in which a receiving device according to the present invention is applied to a personal radio will be described with reference to the drawings. In the drawings, the same parts as those in FIG. 2 are given the same reference numerals.

In FIG. 1, the second
It is the same as the one shown in the figure.

In the personal radio device shown in FIG. 1, when a control signal is received, the receiving section 7
The control signal is converted into a digital signal and read into the controller 1. The controller 1 sequentially compares the calling name in the control signal with the calling name already stored in the storage device 10.

If the group code in the control signal received during the standby operation by the control channel matches the set group code, the call operation is started, and the calling name in the control signal received at that time and the number in the storage device 10 are entered. The controller 1 controls the notification sound generation circuit 8 to output notification sounds of different tones depending on whether the names match or there is no matching name.

Further, the control signal received in the call channel is also compared with the call name in the storage device 10, and a different sound is generated in the same way.

In addition, although the above-mentioned Example shows the case where this invention is applied to a personal radio|wireless device, it may be a reception-only apparatus as long as it can receive a personal radio|wireless.

Further, although an example has been shown in which the comparison result is notified by tone color, it may be notified by the volume of the sound, synthesized voice, light (indicator), or an appropriate combination thereof.

In the case of a receive-only device, it is not possible to immediately start a call with the identified party, but it can be used, for example, like a pager, and when a call arrives, it can tell who is calling, so it is possible to contact the other party. For example, you can contact us by phone. Further, in the case of a reception-only device, there are advantages in that a license is not required and the device is inexpensive.

[Effect of idea]

As explained above, according to the present invention, the receiver automatically identifies and notifies the control signal from a specific personal radio, so there is no need to listen to the voice to find out who is the source of the control signal. You can also know.

Therefore, when the present invention is applied to a personal radio, it is possible to know who the calling party is at the time the call starts without having to listen to the caller's voice.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing the structure of a conventional personal radio, and FIG. 3 is a diagram showing the structure of a control signal. 1... Controller, 8... Notification sound generation circuit,
10... Calling name storage device.

Claims (1)

[Claims for Utility Model Registration] (1) A storage means that stores in advance the calling name of a specific partner station of a personal radio, and a comparison of the calling name in the received control signal and the calling name in the storage means. 1. A receiving device comprising: a comparison means for performing a control signal; and a notification means for notifying a comparison result by the comparison means when receiving a control signal. (2) Utility model registration claim No. (1) characterized in that the calling name in the control signal is that of a control signal that matches the setting group code received during standby operation on the control channel.
Receiving device described in section. (3) Utility model registration claim No. (1) characterized in that the calling name in the control signal is that of a control signal during standby operation in a communication channel.
Receiving device as described.