JPH10271063A - Simultaneous command system in radio system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more securely and more speedily transmit an important simultaneous command by designating a satellite line and a ground line, transmitting the starting signals of the simultaneous commands to both lines and permitting a slave station to receive the simultaneous command by the line which previously receives the starting signal. SOLUTION: A satellite line 6 and a ground line a are designated to the line issuing the simultaneous command by the simultaneous command stand 2 of a control station 1. A simultaneous command controller 3 to which the command stand 2 is connected transmits the starting signal of the simultaneous command by giving a simultaneous or arbitrary time difference to a satellite line controller 9 and a ground line controller 10. In the slave station 8 receiving the simultaneous command, the line control part of the line receiving the starting signal earlier informs a main control part 11 of the termination of the simultaneous command and the main control part 11 connects the call path to a telephone set for receiving command 12 or FAX for receiving command 13. A response recognition signal and a command reception recognition signal are transmitted by the line which previously receives a simultaneous command starting signal or are transmitted by the satellite line 6 and the ground line 7 receiving the starting signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio system including a control station and a plurality of slave stations, and a simultaneous command system in a radio system in which the control station and each slave station are connected by a satellite line and a ground line. It is about.

[0002]

2. Description of the Related Art Conventionally, in a disaster prevention administrative radio system, a simultaneous voice command for connecting from a control station to a receiving telephone of a slave station, a facsimile simultaneous command for connecting to a receiving fax of a slave station, or a slave station. When a line test is performed by the main control unit without calling a telephone or FAX, a line (satellite line or terrestrial line) to be used at the control station's simultaneous command desk, etc.
And the simultaneous command or line test was started using only that line. At the slave station that receives the simultaneous command, the line control unit of either the satellite line or the terrestrial line that has received the start signal of the simultaneous command notifies the main control unit of the arrival of the simultaneous command and sends the simultaneous command to that line. A receiving telephone or a receiving facsimile to be received was connected. In the main control unit, according to the receiving status of the receiving telephone or the receiving FAX, a response confirmation signal and a reception confirmation signal are sent to the satellite line or the ground line, respectively, upon receiving the start signal of the simultaneous command. The control unit was notified and sent using that line. When the line test is received, the line control units of the satellite line and the terrestrial line that have received the start signal notify the main control unit of the arrival of the line test, and return to the main control unit to return the simultaneous command. The response status is notified to the line control unit of either the satellite line or the terrestrial line that has received the activation signal, and the response signal is transmitted using that line.

[0003]

In the above-mentioned prior art, if the line designated for issuing a simultaneous command at the control station has a fault or if there is any abnormality in the transmitting / receiving device, , Whether the simultaneous order does not reach the slave station,
Further, even if it arrives, there is a problem that the response information cannot be confirmed by the control station.

[0004]

According to the present invention, in order to solve the above-mentioned problems, when a control station issues a simultaneous command, both a satellite line and a terrestrial line are designated, and both lines are designated. The start signal of the simultaneous command is transmitted, and the slave station receives the simultaneous command on the line that has received the start signal first. Furthermore, when returning the response confirmation signal or the receipt confirmation signal of the simultaneous command, the slave station transmits only the line that has received the activation signal first, or transmits both the satellite line and the ground line that have received the activation signal. The data is transmitted via a line. As a result, it is possible to transmit an important simultaneous command particularly in the disaster prevention administrative radio system more reliably and quickly.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. A disaster prevention administrative radio system that includes a control station installed in prefectural offices and a plurality of slave stations, and the control station and each slave station are connected by satellite lines and terrestrial lines such as multiplex lines or single lines. In the above, both the satellite line and the terrestrial line are designated as the lines that issue the simultaneous command at the control station simultaneous command stand or the like. The simultaneous command controller to which the simultaneous command console is connected transmits a start command of the simultaneous command to both the satellite line controller and the terrestrial line controller simultaneously or with an arbitrary time difference. In the slave station that receives the broadcast command, the line control unit of the line that has received the broadcast command activation signal first notifies the main control unit of the incoming broadcast command, and the main control unit receives the broadcast command. The call path is connected to a command telephone or a receiving fax machine. The response acknowledgment signal and the acknowledgment acknowledgment signal are sent out on the line on which the simultaneous command start signal was received first, or on both the satellite line and the ground line on which the start signal was received.

In the above-described embodiment, the radio system for disaster prevention administration has been described as an example. However, the present invention is not limited to this, and includes a control station and a plurality of slave stations. It is clear that the present invention is generally applied to a wireless system in which the stations are connected by both satellite lines and terrestrial lines.

[0007]

As described above, according to the present invention, in a wireless system, a simultaneous command can be transmitted and received quickly and reliably, and the issuer can reliably grasp the response of the slave station. In particular, in the disaster management radio system, the early establishment of the whole prefecture's disaster prevention system in each local government is quick, and the effect on disaster prevention measures is enormous.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a wireless system according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Control station, 2 ... Simultaneous command stand, 3 ... Simultaneous command controller, 4 ... Satellite link controller, 5 ... Terrestrial link controller, 6
... Satellite line, 7 ... Ground line, 8
... Slave station, 9 ... Satellite line control unit, 10 ...
Ground line control unit, 11 ... main control unit,
12: receiving telephone, 13: receiving fax,
14. Communication satellite.

Claims (3)

[Claims] 1. A wireless system including a control station and a plurality of slave stations, wherein the control station and each slave station are connected by both satellite and ground lines. When issuing a simultaneous command, the control station transmits a start signal of the same command via the above two lines, and each slave station receives the simultaneous command according to the start signal of the above-mentioned simultaneous command received earlier. A simultaneous command method characterized by the following. 2. The simultaneous command system in a wireless system according to claim 1, wherein when the control station issues a simultaneous command to each slave station, each slave station first receives the start signal of the simultaneous command. A simultaneous command system that selects the line that has performed the request and sends signals such as a response confirmation signal and a receipt confirmation signal to the control station. 3. The simultaneous command system in a wireless system according to claim 1, wherein when the control station issues a simultaneous command to each slave station, each slave station uses both lines that have received the start-up signal. A simultaneous command system that sends signals such as a response confirmation signal and a receipt confirmation signal to the control station.