JPS6412422B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system for responding and confirming a simultaneous command in a wireless telephone system.

Conventionally, wireless telephone systems consisting of a control station and multiple terminal stations have been used, but among these systems, the disaster prevention administrative radio system, which is installed for emergency disasters, has multiple terminal stations A simultaneous command is performed to command the same content all at once.
The contents of this simultaneous command are often important and need to be communicated to all stations, so the control station sends out the simultaneous command information after confirming that all terminal stations are receiving the command. There is. Many of the terminal stations are equipped with an automatic recording device that is activated upon receiving a general command signal.

In such a conventional simultaneous command system, before sending out the simultaneous command information, a control signal is transmitted from the control station to prohibit each terminal station from making a call and to make it prepare to receive a command. The terminal station that receives this control signal notifies the handler that it has received the command of the simultaneous command by a method such as ringing a bell, and the handler responds to each terminal station. Sends a response signal at the assigned timing. The control station that has received this response signal can determine whether the command is being received based on the timing at which the response signal is sent.

However, according to this method, if the operator is absent from the terminal station, the terminal station does not send out a response signal even if the equipment is normal. Therefore, even if the terminal station's equipment is operating normally and automatic recording is possible, the control station may wonder if the terminal station is not sending out a response signal due to equipment failure.
Alternatively, it has the disadvantage that it cannot be determined whether a response signal will not be sent because the operator is not present.

Therefore, it is an object of the present invention to control a situation in which a response signal cannot be transmitted due to equipment failure at a terminal station, and a situation in which a response signal cannot be transmitted due to the terminal station's equipment operating normally but the operator is absent. An object of the present invention is to provide a simultaneous command method for a wireless telephone system that can be identified at a station.

In order to achieve such an objective, the simultaneous command system according to the present invention allows the terminal stations that have received the control signal of the simultaneous command to follow the timing assigned to each terminal station until the handler performs a response operation. The system periodically transmits a command acceptance signal, and after the operator of the terminal station performs a response operation, the command reception signal is converted into a response signal and transmitted. The present invention will be explained in detail below using the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, the demodulation output terminal of the radio device 1 receives signals for detecting a simultaneous command signal, which is a control signal for a simultaneous command sent from a control station (not shown) via a buffer amplifier 2, a target station signal, and a timing signal. It is connected to the input end of the detection circuit 3, and the output end of this signal detection circuit 3 is connected to the input end 4a of the control section 4. Then, the output end 4b of the control section 4
is connected to the input end of a signal generation circuit 5 that generates a command signal and a response signal, and the output end of this signal generation circuit 5 is connected to the modulation input end of the radio device 1 via a switching and buffer amplifier 6. .

On the other hand, a ringing tone generation circuit 8 which generates a ringing tone upon receiving a signal from the output end 4c of the control section 4 is connected to the telephone 7 via a telephone connection circuit 9. Further, the telephone connection circuit 9 outputs a signal indicating that the operator has operated the telephone 7 to make a response operation, and supplies a signal to the input terminal 4d of the control section 4. Note that the hybrid transformer 10 couples the signal from the telephone 7 with the signal from the modulation and demodulation circuit. In addition, although not shown, the control station is provided with a relay exchange, a line control device, and a wireless device.

In the simultaneous command method in the radio telephone system according to the present invention configured as described above, signals are transmitted and received as shown in FIG. 2, and a simultaneous command operation is performed. In addition, in Figure 2, I to D are the main station, and H to
G indicates the signal transmission/reception status of terminal station A, CH to N indicates terminal station B, and L to WA indicates the signal transmission/reception status of terminal station N.

At the control station, the line control device (not shown) connects the RG shown in Figure 2 A from the relay exchange (not shown).
Upon receiving the signal and the simultaneous command signal shown in b.
A control signal for a simultaneous command is transmitted to the terminal stations in the order of a simultaneous command signal a, a plurality of target station signals b, and a timing signal c shown in c. In this case, the target station signal is generally a signal assigned to each individual terminal station, but in some cases, a signal that combines several terminal stations into one group is used to shorten the ringing time.

These control signals are received at the terminal station A as shown in FIG. 2 (H), at the terminal station B as shown in FIG. Then, each signal is detected, and this detection power is supplied to the input terminal 4a of the control section 4. The control unit 4 controls the signal generation circuit 5 to send out an order signal in accordance with the timing assigned to each terminal station.

From the timing assigned to the terminal station, terminal station A
Assuming that terminal station B is the first responding station, terminal station B is the next responding station, and terminal station N is the last responding station, when terminal station A receives the timing signal c as shown in Fig. 2E, it transmits the terminal as shown in F. The command acceptance signal d is transmitted after the timing assigned to station A, and when terminal station B also receives the timing signal, it transmits the command acceptance signal e after the timing assigned to its own station. Then, in the same manner, all terminal stations transmit command acceptance signals in accordance with the timings assigned to each station. These command reception signals are received by the control station as shown in (d), and the terminal station is identified and displayed based on the timing at which they are sent. Then, the control station can identify that the equipment of the terminal station that transmitted the command acceptance signal is operating normally, and that it is at least ready to receive a command for automatic recording.

This command acceptance signal is sent out periodically as shown in FIGS. For example, when the terminal station B performs a response operation on the telephone 7 at time h as shown in FIG. 2, this state is transmitted from the telephone connection circuit 9 to the control section 4. Then, the control unit 4 transmits the command reception signal that has been periodically transmitted as a response signal.
Controls the signal generation circuit 5. Therefore, terminal station B transmits a response signal i as shown in FIG. 2, and thereafter transmits the same response signal i periodically. At this time, the receiving signal and the response signal can be distinguished by the control station by, for example, changing the frequency.

Similarly, other terminal stations periodically transmit a command acceptance signal until a response operation is performed, and after the response operation is performed, a response signal is periodically transmitted in place of the command reception signal. The same is true for terminal station N, which originally transmits a command acceptance signal and then transmits a response signal after the response operation, but O and W in Figure 2 show the timing before the terminal station N transmits the command reception signal. Because the response operation was performed at time f, the response signal is being transmitted even at the timing when the command acceptance signal is to be transmitted.

The above operation will be explained in more detail as follows. The acceptance signal and the response signal are sent at the timing assigned to the terminal station, and if no response operation is performed at that timing, the acceptance signal is transmitted, and if the response operation is performed, the reception signal is sent as a response. It is starting to turn into a traffic light. Furthermore, symbol i in FIG. 2 indicates that terminal station B, which performed the response operation at symbol h, is transmitting a response signal because the timing has come to transmit an acceptance signal or a response signal, and symbol g in FIG. The terminal station N that performed the response operation at symbol f is transmitting a response signal because the timing for transmitting its own command signal or response signal has arrived. The reason for the difference in timing is as follows.

Terminal station B sends out an order acceptance signal or response signal at the timing assigned to that station (if not responding, it is an acceptance signal; if it has responded, it is a response signal). The same applies to terminal station N, and the transmission timings of terminal stations B and N are different as shown in the figure. Terminal station B happened to respond at timing h, so it waited until transmission timing i of that station and sent out a response signal at that timing. After the terminal station N happens to perform a response operation at timing f, it lasts until the transmission timing g of that terminal station N.
The response signal was sent at this timing. In this way, the sending timing differs depending on the station, and the timing of responding is up to you.
Since it is undefined, the time from when a response is received to when a response signal is output varies.

In this way, after receiving the control signal of the simultaneous command, first transmit the command acceptance signal, and then only the terminal station that performed the response operation switches the command reception signal to the response signal and transmits it. The normality or abnormality of the terminal station and the presence or absence of the operator can be determined from the signals returned at the timing assigned to the terminal station.

When the simultaneous command ends, the RG signal sent from the relay exchange (not shown) disappears at the time point F in FIG. 2, so the control station transmits a recovery signal l as shown in C. This recovery signal is
When the terminal station receives the signal, as in the case of ``chi'' or ``ru'', the terminal station releases the simultaneous command state and returns to the normal state.

Note that if the recovery signal transmitted from the terminal station to the control station at the end of a call is used as the command acceptance signal transmitted from the terminal station, this system can be realized economically without increasing the types of signals. In addition, this reception signal may include a tone signal that is identified based on the difference in frequency, or a tone signal that is identified by shifting the frequency and using the method of shifting the frequency.
Any FSK signal may be used.

As explained above, in the simultaneous command system of the wireless telephone system according to the present invention, the terminal stations that have received the control signal of the simultaneous command operate at the timing assigned to each terminal station until the operator performs a response operation. Since a follow-up command signal is periodically transmitted and the terminal station operator performs a response operation, this command signal is converted into a response signal, so no response signal is sent at the control station. The station has an excellent effect of being able to identify whether the problem is due to equipment failure or the absence of the operator.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a radio telephone system according to the present invention, and FIG. 2 is a timing diaphragm of signals transmitted and received between a control station and a terminal station. DESCRIPTION OF SYMBOLS 1...Radio device, 3...Signal detection circuit, 4...Control unit, 5...Signal generation circuit, 8...Telephone.

Claims (1)

[Claims] 1 Consisting of a control station and a plurality of terminal stations, when the control station issues a simultaneous command to the terminal stations, when the terminal station handler performs a response operation, each terminal station is assigned to each terminal station. In the simultaneous command method of a wireless telephone system that transmits a response signal after the specified timing, each terminal station that receives the simultaneous command will follow the timing assigned to each terminal station until the operator performs the response operation. 1. A simultaneous command system for a radio telephone system, characterized in that a command reception signal is periodically sent out, and after the operator of the terminal station performs a response operation, the command reception signal is changed to a response signal.