JPS5829230A - Dispatching telephone system of radio telephone system - Google Patents

Abstract

PURPOSE:To permit a control office to discriminate between a fault of equipment at a terminal office and the absence of an operator, by sending a command reception signal periodically from each dispatched terminal office, and sending an answer signal instead of the command reception signal after an operator performs answering operation. CONSTITUTION:A control office sends out a dispatching signal (a), plural objective office signals (b), and a timing signal (c) as shown by (c). Each terminal office transmits command reception signals (d) and (e) periodically at its assigned timing(f and i). Once an operator performs answering operation at a terminal office (g and j), an answer signal (i) is transmitted periodically instead of the command reception signals.

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 content of this simultaneous command is often important and needs to be communicated to all stations, so the control station sends the simultaneous command information after confirming that all terminal stations are receiving the command. It has become. 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 has received the Jin control signal notifies the handler by ringing a bell or other means that it is receiving the command of the Jin command, and the handler responds to the command to be assigned to each terminal station. A response signal is sent at the specified timing. The control station that has received this response signal can identify that it is receiving orders 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. For this reason, even if the terminal station's equipment is operating normally and automatic recording is possible, the control station may find that the terminal station is not sending out a response signal due to equipment failure, or that the operator is absent. Therefore, it has the disadvantage that it cannot be determined whether a response signal is to be sent or not.

Therefore, an object of the present invention is to enable a control station to distinguish between a state in which a response signal cannot be sent due to equipment failure at a terminal station, and a state in which a response signal cannot be sent out due to the absence of a handler, although the terminal station's equipment is operating normally. The purpose of the present invention is to provide a simultaneous command method for a wireless telephone system.

In order to achieve such an objective, the simultaneous command system according to the present invention has the following features: - The terminal stations that have received the control signal of the simultaneous command operate at the timing assigned to each terminal station until the handler performs a response operation. Periodically sends a follow command signal,
After the operator of the terminal station performs a response operation, this command reception signal is changed into a response signal and transmitted. The present invention will be described 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. The output terminal of the signal detection circuit 3 is connected to the input terminal 4m of the control section 4. Then, the output i4b of the control unit 4
is connected to the input end of a signal generation circuit 5 that generates an acceptance signal and a response signal, and the output end of this signal generation circuit 5 (7) is connected to the modulation input end of the radio device 1 via a switching and buffer amplifier 6. ing.

On the other hand, a ringing tone generation circuit 8 which generates a ringing tone upon receiving a signal from the output terminal 4C of the control section 4 is connected to the telephone 1 via a telephone connection circuit B. Further, the telephone connection circuit 9 detects that the operator operates the telephone 1 to perform a response operation, and supplies a signal to the input terminal 4d of the control section 4.

Note that the hybrid transformer 10 combines the signal from the telephone 7 and the signal from the modulation and demodulation circuit. In addition, although not shown, the control station is provided with a relay exchange single 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 Fig. 2, P) to P) are the master station, and P) to P) are the terminal station A1.
(a) to (f) are terminal stations B%QO to c'7) are terminal stations N
This shows the signal transmission/reception status.

At the control station, a line control device (not shown) is connected to a trunk exchange (
When receiving the RG damage signal shown in FIG. 2 (A) and the simultaneous command signal shown in FIG. ,! Control signals for simultaneous commands are transmitted in the order of several target station signals and timing signal 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 as shown in FIG. 3 detects each signal, and this detection power is supplied to the input end 4a of the control section 4. The control unit 4 controls the signal generation circuit 5 in accordance with the timing assigned to each terminal station, and sends out the command reception signal.

Assuming that terminal station A is the first responding station, terminal station B is the next responding station, and terminal station N is the last responding station from the timing assigned to the terminal station, terminal station A responds as shown in Figure 2 (E). When the timing signal C is received at the terminal station A, as shown in (1), the terminal station
transmitting an order reception signal d after the timing assigned to
When terminal station B also receives the timing signal, it transmits the command acceptance signal e after the timing assigned to itself. 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 (a), and the terminal station is identified and displayed based on the timing of the reception. Then, at the control station, it can be determined that the equipment of the terminal station that transmitted the command acceptance signal is operating normally and is ready to receive a command, which can at least automatically record data.

This acceptance signal is sent out periodically as shown in Figure 2 (f) and (s), and even if the line condition is temporarily bad and the first signal is not received, it can be received in the next cycle. . Then, for example, terminal station B uses telephone 1 at time h as shown in the figure.
When the response operation is performed, Jin's status is transmitted from the telephone connection circuit 9 to the control unit 4.

Then, the control unit 4 controls the signal generation circuit 5 to send out the command acceptance signal, which has been sent periodically, as a response signal. Therefore, the terminal station B transmits the response signal 1 as shown in 2nd II (su), and thereafter periodically transmits the same response signal 1.

Similarly, the other terminal stations periodically transmit a command acceptance signal until a response operation is performed, and after performing a response operation, they periodically transmit a response signal in place of the command reception signal.

The same goes for terminal station N, which originally transmits an acceptance signal.
After the response operation, a response signal is sent, as shown in Figure 2 (
b) and 0 indicate that the terminal station N performed a response operation at time f before the timing to transmit the acceptance signal, so the response signal is being sent even at the timing when the acceptance signal is sent. ing.

In this way, after receiving the control signal of the -sai 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, then at the control station, each terminal 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 station.

- When the command ends, the KG damage signal sent from the relay exchange (not shown) disappears at the time of Figure 2 F, so who is the control station? The recovery signal 1 is sent as shown now. This recovery signal (e), (7).

When the terminal station receives the signal Q→, the terminal station releases the simultaneous command state and returns to the normal state.

Note that if the restoration signal transmitted from the terminal station to the control station at the time of termination is used as the command acceptance signal transmitted from the terminal station, this system can be realized economically without increasing the types of signals.

The command reception signal may be either a tone signal that performs identification based on a frequency difference, or an F8 signal that shifts the frequency and performs identification based on the shift method.

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 are assigned to each terminal station individually until the operator is able to perform the response operation. The control station transmits a command reception signal periodically according to the specified timing, and after the operator of the terminal station performs a response operation, this command reception signal is changed to a response signal. Therefore, the response signal is not transmitted at the control station. This has an excellent effect of being able to identify whether a station that was not present 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 wireless telephone system according to the present invention, and FIG. 2 is a timing diagram of signals transmitted and received between a control station and a terminal station. 1・11+1@Radio device, 3・Fist・・Signal detection circuit, 4・Life・・Control unit, 5・1141・Signal generation circuit, 8・・
0'W1 talk machine. Patent applicant Hitachi Electronics Co., Ltd. Agent Masaki Yamakawa (and one other person)

Claims (1)

[Claims] It consists of a control station and a plurality of terminal stations, and when the control station issues a simultaneous command to the terminal stations, each terminal station is assigned to each cough terminal station when the terminal station operator performs a response operation. In a simultaneous command method of a wireless telephone system that transmits a response signal after a timing, each terminal station that receives a simultaneous command follows the timing assigned to each terminal station until the operator performs a 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 into a response signal.