JP4952901B2 - Wireless transmission system and wireless transmission control method - Google Patents

Description

  The present invention is configured to transmit and receive signals after matching settings related to radio signal passing (hereinafter, defined as radio channel settings) of two radio transmission apparatuses facing each other in a one-to-one relationship via radio channels. The present invention relates to a wireless transmission system and a wireless transmission control method.

  When controlling a wireless transmission device facing one-to-one via a wireless line, an operator must move to each station, and the control device must be directly connected to the control terminal device for control. In order to avoid such a situation, each wireless transmission device is required to have a remote control function and realize a function with better maintainability.

  For example, in Patent Document 1 below, a service channel signal of an interface unit having a wired port and a wireless port is a signal composed of a character code (hereinafter, defined as a word) other than a predetermined character code such as an ASCII code. There has been proposed a method for controlling a remote device by determining whether or not there is and routing the service channel signal to a wired port or a wireless port.

  FIG. 3 shows an embodiment of the above-mentioned publication. In the control system shown in FIG. 3, the wireless transmission device 200 includes an SC (service channel) interface unit 210 and a control unit (hereinafter referred to as MPU 220), and one wireless transmission device 200 in the control system includes an SC. A control terminal device 300 that outputs a device control signal is connected via the interface unit 210. In the wireless transmission device 200, a different word is set for each device. In the wireless transmission device 200, an SC (service channel) interface unit 210 has a word detection function and a service channel routing function, and performs word detection on an SC signal from the wired line 240/310 or the wireless line 100, It is detected whether or not it matches a word set for each wireless transmission device, and if it matches, the SC signal is routed to a 230 control unit (hereinafter referred to as MPU unit 220) via a wired line, and the wireless transmission device 200 is detected. Execute the control. If the SC signal does not match the word set for each wireless transmission device when the word is detected, the SC signal is passed through (through) the next wireless transmission device as it is. The MPU unit 220 receives the aforementioned routed SC signal and executes control of the wireless transmission device.

  As described above, the control signal from the control terminal device 300 transmitted via the SC signal communicates only with the MPU unit of any one wireless transmission device, and remote control is possible.

JP 2002-353909 A

  However, the above method has the following problems.

  2. Description of the Related Art Conventionally, in a wireless transmission device facing one-to-one via a wireless line, a facing wireless transmission device (hereinafter referred to as a local station device) is connected from a wireless transmission device connected to a control terminal device (hereinafter referred to as a local station device). In the case where remote control is possible for the opposite station device), it is common to control the opposite station device by transmitting a control signal from the own station device to the opposite station through the above-described wireless line. is there.

  However, if it is necessary to change the settings of both opposing devices, such as changing the wireless channel settings, it is necessary to individually control the wireless channel setting change for each of the own station device and the opposite station device. Had to be done twice. In addition, when changing the wireless channel settings, if the wireless channel of the local station device is changed before the opposite station device, the wireless channel settings between the devices do not match, so the wireless line is disconnected and the opposite station device is controlled. There was a problem that became impossible.

  The first problem is that when the own station apparatus and the opposite station apparatus need to be controlled as in the case of changing the wireless channel setting, the same control must be performed twice.

  The reason is that the SC signal (control signal) is routed to the MPU unit 220 only when the words set for each device match, so that the control terminal device 300 and the MPU unit 220 of the device always communicate one-to-one. This is because a plurality of devices cannot be controlled at the same time.

  The second problem is that when changing the radio channel setting of the opposite station device, the radio channel setting of the opposite station device must be changed before changing the radio channel setting of the own station device.

  The reason for this is that if the wireless line setting of either one of the devices is changed, the wireless line will be disconnected. Therefore, if the local station device is controlled first, communication with the opposite station device becomes impossible. This is because the station apparatus cannot be controlled.

  The third problem is that it is difficult to restore the radio line if the radio line is interrupted due to an incorrect control for some reason when changing the radio line setting of the opposite station device. Is to become.

  The reason is that, when the radio line setting is changed, the operator's operation error of the control terminal device 300 or an error at the time of SC signal transmission causes an unintended erroneous control to be executed in the opposite station device, and the radio line is disconnected. If this happens, in order to restore the line again, go to the station where the opposite station device is installed and set it correctly or change the wireless line setting of the own station device until it matches the setting of the opposite station device. This is because the work to be performed must be carried out.

  In addition, when changing the wireless line setting of the opposite station device, in order to restore the wireless line when incorrect control is performed and the wireless line setting between the devices becomes inconsistent and the wireless line is disconnected Because it is necessary to go to the station where the opposite station device is installed and set it correctly or to change the wireless line setting of the own station device until it matches the setting of the opposite station device, it is difficult to restore the wireless line There was a problem of being.

  An object of the present invention is to provide a wireless transmission system and a wireless transmission control method for solving the above-described problems, that is, the wireless line settings of both opposing wireless transmission apparatuses can be changed by one control, and the wireless line is changed after the wireless line setting is changed. It is to provide a wireless transmission system and a wireless transmission control method capable of avoiding the case where control of the opposite device cannot be performed in a state where the wireless communication is not performed when the wireless communication is not restored.

  In order to solve the above problems, the present invention employs means for solving the problems having the following characteristics.

  In the present invention, when control of the radio channel setting change of the local station device is performed, a control command for changing the radio channel setting of the opposite station device based on the radio channel setting of the local station device is generated and transmitted to the opposite station device. After confirming that the above-mentioned control command has been received by the opposite station device, it has a function of changing the wireless channel setting of the own station device, so that the own station device and the opposite device can be operated in one operation. It is possible to provide a radio transmission system and a radio transmission control method capable of changing the radio channel setting of a station apparatus.

  In addition, before changing the wireless line setting, the function to save the wireless line setting information before the setting change in the memory provided in the device and sufficient time for the wireless line to recover after the wireless line setting change. When the wireless line is disconnected even if the wireless line is disconnected by changing the wireless line setting by providing the function of reading the wireless line setting information stored in the memory when the wireless line is disconnected, It is possible to provide a wireless transmission system and a wireless transmission control method capable of restoring a wireless line in a state before the setting is changed.

Specifically, the wireless transmission system according to the first aspect of the present invention is:
The local station side wireless transmission device (1a) generates a counter station setting command (22a) according to a change request signal for requesting a wireless line setting change from the control terminal device (10). And a first multiplexing means for multiplexing the opposite station setting command (22a) and transmitting the first radio transmission signal,
The opposite station side wireless transmission device (1b)
A second radio frame separating means (60b) for separating the first radio transmission signal, extracting and sending a command reception notification signal (63b) and a reception command (61b) corresponding to the opposite station setting command;
The command reception notification signal (63b) is received, multiplexed into a radio frame to generate a radio transmission signal (51b), and the local station side wireless transmission device (1a) via the other station side wireless transmission / reception means (70b) Second multiplexing means for transmitting to,
The reception command (61b) is received, the wireless line setting information (31b) of the local radio transmission apparatus before the setting change is stored in the second setting storage means (40b), and the command reception notification signal (63b) When transmission to the wireless transmission device (1a) is detected, second line setting changing means (30b) for changing the wireless line setting of the wireless transmission device (1b) according to the reception command (61b) is provided. And
The local station side wireless transmission device (1a)
The received radio signal transmitted from the opposite station side wireless transmission device (1b) is demodulated, the command reception notification signal (63b) is extracted from the demodulated radio received signal (71a), and the opposite setting command (22a) is obtained. When it is detected that the second radio frame separation means (60b) has transmitted and extracted, a command reception detection signal (62a) is generated and output to the local station side setting command output means (20a). Radio frame separating means (60a)
The local station setting command output means (20a) receives the command reception detection signal (62a), and transmits the setting change request signal as a device setting command (21a) to the first line setting changing means (30a). ,
When the device setting circuit (30a) receives the device setting command (21a), the setting information (31a) of the local wireless transmission device before the setting change is stored in the setting storage memory (40a) in the first setting storage means (40a). ), And according to the device setting command (21a), change the wireless channel setting of the local station side wireless transmission device (1a),
When the wireless transmission / reception means (70a / 70b) on the local station side and the other station side monitor whether or not the wireless line is disconnected, and detects the disconnection of the wireless line, the line disconnection detection signal is sent to each of the first and second stations. And the second line setting changing means (30a / 30b),
The first and second line setting change means (30a / 30b) receive the line disconnection detection signal and are stored in the first and second setting storage means (40a / 40b), respectively. The line setting information before the setting change is read, and the wireless line settings of the wireless transmission devices (1a / 1b) on the own station side and the other station side are returned to the wireless line settings before the change.

The radio transmission control method according to the second aspect of the present invention includes:
Generating a counter station setting command (22a) for issuing a channel setting change instruction of the counter station in accordance with a change request signal for requesting a radio channel setting change from the control terminal device in the local station side wireless transmission device;
Multiplexing the opposite station setting command (22a) and transmitting a first wireless transmission signal;
In the opposite station side wireless transmission device, separating the first wireless transmission signal, extracting and transmitting a command reception notification signal (63b) and a reception command (61b) corresponding to the opposite station setting command;
Receiving the command reception notification signal (63b), multiplexing it into a radio frame, generating a radio transmission signal (51b), and transmitting the radio transmission signal (1a) to the local station side;
Receiving the reception command (61b) and storing the wireless channel setting information (31b) of the local radio transmission apparatus before the setting change ;
Detecting whether the command reception notification signal (63b) is transmitted to the wireless transmission device (1a);
When transmission of the command reception notification signal (63b) to the wireless transmission device (1a) is detected, changing a wireless channel setting of the wireless transmission device (1b) according to the reception command (61b);
Step of demodulating the received radio signal transmitted from the radio transmission device (1b) and extracting a command reception notification signal (63b) from the demodulated radio reception signal (71a) in the local radio transmission device (1a) When,
Detecting whether or not the opposite setting command (22a) is transmitted and extracted to the second radio frame separating means (60b);
A step of generating and outputting a command reception detection signal (62a) when transmission and extraction of the opposing setting command (22a) are detected by the second radio frame separation means (60b);
Receiving the command reception detection signal (62a) and transmitting the setting change request signal as a device setting command (21a);
Upon receiving the device setting command (21a), the setting information (31a) of the local station side wireless transmission device before the setting change is stored in the setting storage memory (40a), and the local station side according to the device setting command (21a) Changing the wireless line setting of the wireless transmission device (1a);
A step of monitoring whether or not the wireless line is disconnected in the wireless transmission / reception means (70a / 70b) on the own station side and the other station side;
A step of transmitting a line disconnection detection signal to the wireless transmission / reception means (70a / 70b) on the own station side or the other station side when detecting a disconnection of the wireless line;
The line disconnection detection signal is received, the line setting information before the change of the wireless line setting stored in the first or second setting storage means (40a / 40b) is read, and the local station side and the other station side Returning the wireless line setting of the wireless transmission device (1a / 1b) to the wireless line setting before the change ;
It is characterized by having.

  The first effect of the present invention is that when a radio line setting is changed in a radio transmission apparatus facing each other with a distance via a radio line, the radio line setting change is executed for one of the radio transmission apparatuses. In addition, by changing the radio channel setting of the other opposite station device together, it is possible to change the radio channel settings of both of the opposing radio transmission devices by one control.

  The reason is that, when changing the radio channel setting of the local station device, the radio channel setting to be changed is multiplexed in a radio frame and notified to the opposite station device as a command for changing the radio channel setting of the opposite station device. A function for extracting the radio line setting change command notified from the opposite station apparatus from the radio frame and changing the radio line setting of the own station apparatus, and the above-mentioned radio line setting change command in the opposite station apparatus is It has a function to change the wireless channel setting of the opposite station device before changing the wireless channel setting of the local station device by changing the wireless channel setting of the local station device after detecting the reception. Because.

  The second effect of the present invention is that, in a wireless transmission device facing through a wireless line at a distance, when changing the wireless line setting, an error occurs on the wireless line and the like. If the wireless line settings of the devices that do not match and the wireless line does not recover even after the wireless line settings are changed, it is possible to prevent the opposite side device from being unable to be controlled while the wireless connection is disabled. .

  The reason is that the current wireless line setting is saved before changing the wireless line setting, and if it is detected that the wireless line does not recover even after a sufficient amount of time to recover after changing the wireless line setting, This is because it has a function of reading out the wireless line setting stored in and returning it to the wireless line setting before changing the wireless line setting.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing an embodiment of the present invention. In the embodiment shown in FIG. 1, the wireless transmission device 1a and the wireless transmission device 1b are opposed to each other via a wireless line, and each wireless transmission device 1a / 1b has an interface function with the control terminal device 10, and the control terminal device. In response to the control from 10, the wireless line setting is controlled. Here, the configuration of the wireless transmission device 1a will be described in detail. The wireless transmission device 1a and the wireless transmission device 1b have the same configuration, and 20b to 71b constituting the wireless transmission device 1b correspond to 20a to 71a constituting the wireless transmission device 1a, respectively.

  In FIG. 1, when the setting command output circuit 20a receives from the control terminal device 10 a signal for requesting to change the wireless line setting of the wireless transmission device 1a, the setting command output circuit 20a sends an opposite setting command 22a based on the requested wireless line setting information. Generated and output to the radio frame multiplexing circuit 50a in order to notify the radio transmission apparatus 1b facing the radio channel setting information of the radio transmission apparatus 1a. Further, when receiving a command reception detection signal 62a from a radio frame separation circuit 60a, which will be described later, the setting command output circuit 20a changes the radio line setting of the own station apparatus (radio transmission apparatus 1a) from the control terminal device 10. The requested signal is output as a device setting command (own station setting command) 21a to the device setting circuit 30a.

  The device setting circuit 30a changes the wireless line setting of the wireless transmission device 1a according to the wireless line setting requested from the control terminal device 10 in accordance with the device setting command 21a from the setting command output circuit 20a. When a reception command 61a is received from a radio frame separation circuit 60a, which will be described later, the radio channel setting of the radio transmission device 1a is changed in accordance with a request to change the radio channel design from the radio transmission device 1b. Furthermore, before changing the wireless line setting of the wireless transmission device 1a, the device setting circuit 30a outputs the wireless line setting information of the wireless transmission device 1a before the setting change as setting storage information 31a to a setting storage memory 40a described later. If the circuit disconnection detection signal 72a continues to be received from the wireless transmission / reception circuit 70a described later even after a sufficient time for the wireless line to recover after changing the wireless line setting, the wireless line setting is changed. After the change of the wireless line setting, it is determined that the wireless line is disconnected, and the setting storage information 31a before the change is read from the setting storage memory 40a and sent to the apparatus setting circuit 30a as a command 41a. The wireless line setting of the wireless transmission device 1a is changed according to the wireless line setting information before the change.

  The setting storage memory 40a holds setting storage information 31a that is received from the device setting circuit 30a and indicates the wireless line setting before the setting change.

  The radio frame multiplexing circuit 50a multiplexes the opposite setting command 22a received from the setting command output circuit 20a and the command reception notification signal 63a from the radio frame separation circuit 60a into a radio frame to generate a radio transmission signal 51a, which will be described later. The data is output to the wireless transmission / reception circuit 70a.

  The radio frame separation circuit 60a receives a radio reception signal 71a from a radio transmission / reception circuit 70a, which will be described later, and a counter setting command 22b multiplexed by the radio frame multiplexing circuit 50b of the radio transmission device 1b facing the radio reception signal 71a. Then, the command reception notification signal 63b is extracted. When the opposite setting command 22b is extracted and it is recognized that there is a request for changing the wireless line setting from the wireless transmission device 1b, a command reception notification signal 63a is generated and output to the wireless frame multiplexing circuit 50a. 22b is output to the apparatus setting circuit 30a as a reception command 61a. When the command reception notification signal 63b is extracted and it is confirmed that the opposite setting command 22a generated by the setting command output circuit 20a is extracted by the wireless frame separation circuit 60b of the wireless transmission device 1b, the command reception detection signal 62a is generated and output to the setting command output circuit 20a.

  The radio transmission / reception circuit 70a modulates the radio transmission signal 51a from the radio frame multiplexing circuit 50a, converts it to a radio frequency, outputs the radio frequency to the radio line, and transmits the radio signal from the radio transmission device 1b facing through the radio line. After demodulating the signal, extracting the clock and establishing synchronization of the radio frame, the radio reception signal 71a is output to the radio frame separation circuit 60a. When the line condition of the wireless line is monitored and it is detected that the line is disconnected, a line disconnection detection signal 72a is output to the device setting circuit 30a.

  Hereinafter, the control operation at the time of changing the radio channel design of the radio transmission apparatus in the above-described embodiment will be described in detail.

  First, referring to FIG. 1, in a state where the wireless transmission device 1a is opposed to the wireless transmission device 1b through a wireless line, the wireless transmission device 1a receives a signal for requesting a wireless line setting change from the control terminal device 10. Then, the operation from when the wireless channel setting of the wireless transmission device 1a / 1b is changed until the wireless channel is turned on again will be described in detail.

  In FIG. 1, a setting command output circuit 20a of the wireless transmission device 1a requests a wireless line setting change from the control terminal device 10 in order to change the wireless transmission device 1b to the same wireless line setting as the wireless transmission device 1a. According to the signal, the opposite setting command 22a is generated and output to the radio frame multiplexing circuit 50a.

  The radio frame multiplexing circuit 50a multiplexes the opposite setting command 22a from the setting command output circuit 20a into a radio frame, and outputs a radio transmission signal 51a to the radio transmission / reception circuit 70a. The radio transmission / reception circuit 70a modulates the received radio transmission signal 51a, converts it to a radio frequency, and transmits it to the radio line.

  The radio transmission / reception circuit 70b of the radio transmission device 1b facing the radio transmission device 1a demodulates the radio signal received from the radio transmission device 1a via the radio line, extracts the clock, and establishes synchronization of the radio frame. Then, the wireless reception signal 71b is output to the wireless frame separation circuit 60b. The radio frame separation circuit 60b extracts the opposite setting command 22a (22a portion of 51a) multiplexed by the radio frame multiplexing circuit 50a from the radio reception signal 71b, and a request for changing the radio channel setting is received from the radio transmission apparatus 1a. If it is confirmed, the command reception notification signal 63b is output to the radio frame multiplexing circuit 50b, and the opposite setting command 22a is output to the device setting circuit 30b as the reception command 61b. The radio frame multiplexing circuit 50b multiplexes the command reception notification signal 63b from the radio frame separation circuit 60b into a radio frame, generates a radio transmission signal 51b, and outputs the radio transmission signal 51b to the radio transmission / reception circuit 70b. The radio transmission / reception circuit 70b modulates the received radio transmission signal 51b, converts it to a radio frequency, and transmits it to the radio line. Upon receiving the reception command 61b from the radio frame separation circuit 60b, the device setting circuit 30b outputs the current radio channel setting of the local station device as setting save information 31b to the setting storage memory 40b, and the command reception notification signal 63b described above. Is multiplexed into a radio frame by the radio frame multiplexing circuit 50b and transmitted to the radio transmission device 1a, the radio line setting of the radio transmission device 1b is changed according to the reception command 61b.

  The wireless transmission / reception circuit 70a in the wireless transmission device 1a demodulates the wireless signal received from the wireless transmission device 1b via the wireless line, extracts the clock and establishes synchronization of the wireless frame, and then receives the wireless reception signal 71a. Is output to the radio frame separation circuit 60a. The radio frame separation circuit 60a extracts the command reception notification signal 63b multiplexed by the radio frame multiplexing circuit 50b from the radio reception signal 71a, and the opposite setting command 22a multiplexed into the radio frame by the radio frame multiplexing circuit 50a is When the radio frame separation circuit 60b of the radio transmission apparatus 1b confirms that the radio frame is extracted from the radio frame, the command reception detection signal 62a is generated and output to the setting command output circuit 20a. When the setting command output circuit 20a receives the command reception detection signal 62a from the radio frame separation circuit 60a, the setting command output circuit 20a uses the signal for requesting the change of the radio line setting from the control terminal device 10 as the device setting command 21a to the device setting circuit 30a. Output. Upon receiving the device setting command 21a from the setting command output circuit 20a, the device setting circuit 30a outputs the current setting information of the local station device as setting save information 31a to the setting storage memory 40a, and then according to the device setting command 21a. The wireless line setting of the wireless transmission device 1a is changed.

  As described above, when the radio channel setting of the radio transmission device is changed in the radio transmission devices 1a / 1b facing each other via the radio channel shown in FIG. 1, the radio channel setting change is performed in either one of the radio transmission devices. It is possible to change the radio channel setting of the opposite station device to make the radio channel conductive only by performing the control, and after confirming that the opposite setting command 22a is extracted in the opposite station device, that is, By changing the radio channel setting of the local station device after detecting the setting command 22a, it is possible to change the radio channel design of the opposite station device before the local station device.

  Next, in FIG. 1, when the setting of the radio transmission device 1a / 1b is changed as described above, an error occurs in the radio frame on the radio channel, so that the radio channel setting of the radio transmission device 1a / 1b matches. The operation when the wireless line is not disconnected and is not restored will be described.

  The radio transmission / reception circuits 70a / 70b monitor the channel status of the radio channel, confirm that the radio channel is disconnected, and output a line disconnection detection signal 72a / 72b to the device setting circuit 30a / 30b. Since the device setting circuit 30a / 30b continues to receive the line disconnection detection signal 72a from the wireless transmission / reception circuit 70a / 70b even after a sufficient time for the wireless line to recover after the wireless line setting change, the device setting circuit 30a / 30b changes the wireless line setting. Therefore, the apparatus setting circuit 30a / 30b determines that the wireless line is disconnected and returns the setting to the wireless line setting before the change, so that the device setting circuit 30a / 30b reads the read command 41a stored in the setting storage memory 40a / 40b. / 41b is read, and the wireless channel setting of the wireless transmission device 1a / 1b is returned to the wireless channel setting before the change.

  As described above, when the wireless line is not turned on after the wireless line setting of the wireless transmission device 1a / 1b is changed, the wireless line is securely connected by detecting the line disconnection and returning to the wireless line setting before the change. It can be restored.

  In FIG. 1, the device setting circuit 30a of the wireless transmission device 1a continues to receive the circuit disconnection detection signal 72a from the wireless transmission / reception circuit 70a even after a sufficient time for the wireless channel to recover after the wireless channel setting is changed. If the wireless line setting is changed, it is determined that the wireless line is disconnected, the read command 41a is read from the setting storage memory 40a, the wireless line setting before the change is restored, and the wireless line is restored. .

  Each of the above-described embodiments is merely an example of a preferred embodiment of the present invention, and the present invention can be implemented with various modifications without departing from the gist thereof. For example, as shown in FIG. 2, the device setting circuit 30a of the wireless transmission device 1a outputs a setting change notification signal 32a to the wireless frame multiplexing circuit 50a when the wireless line setting is changed, and the wireless frame separation circuit 60a performs wireless transmission. When the setting change notification signal 32b multiplexed by the radio frame multiplexing circuit 50b of the device 1b is extracted, the opposite setting change detection signal 64b is output to the device setting circuit 30a. The device setting circuit 30a If the opposite setting change detection signal 64a is not received from the radio frame separation circuit 60a even after a sufficient time for the radio line to recover after the change, the radio line is interrupted by changing the radio line setting. The read command 41a is read from the setting storage memory 40a, and the wireless line setting before the change is restored. , It may be the operation that to restore the radio channel.

1 is a block diagram showing an embodiment of a wireless transmission system of the present invention. It is a block diagram which shows other embodiment of the radio | wireless transmission system of invention. It is a block diagram which shows an example of the conventional wireless transmission system.

Explanation of symbols

1a, 1b Wireless transmission device 10 Control terminal device 20a, 20b Setting command output circuit 21a, 21b Device setting command (own station setting command)
22a, 22b Opposite setting command 30a, 30b Device setting circuit 31a, 31b Setting storage information 40a, 40b Setting storage memory 50a, 50b Radio frame multiplexing circuit 51a, 51b Radio transmission signal 60a, 60b Radio frame separation circuit 61a, 61b Reception command 62a , 62b Command reception detection signal 63a, 63b Command reception notification signal 70a, 70b Wireless transmission / reception circuit 71a, 71b Wireless reception signal 72a, 72b Circuit disconnection detection signal

Claims (2)

There is a one-to-one opposition via a wireless line, and the own station side wireless transmission apparatus in the own station and the opposite station side wireless transmission apparatus in the opposite station facing the own station, and the settings of the wireless lines are matched in advance. In addition, in a wireless transmission system that transmits and receives signals,
The own station side wireless transmission device transmits a wireless channel setting change request command to the opposite station side wireless transmission device,
The opposite station side wireless transmission device transmits a command reception notification signal indicating that the change request command has been received to the local station side wireless transmission device, and the command reception notification signal is transmitted to the local station side wireless transmission device. If detected, according to the change request command, change the radio line setting of the opposite station side wireless transmission device,
The local station side wireless transmission device is a wireless transmission system that receives the command reception notification signal and changes a wireless line setting of the local station side wireless transmission device according to the change request command,
The local station side wireless transmission device multiplexes the local station side setting command output means for generating the opposite station setting command and the opposite station setting command in accordance with a change request signal for requesting a wireless line setting change from the control terminal device. First multiplexing means for transmitting a first wireless transmission signal;
The opposite station side wireless transmission device is:
Second radio frame separation means for separating the first radio transmission signal, extracting and sending out a command reception notification signal and a reception command corresponding to the opposite station setting command;
Second multiplexing means for receiving the command reception notification signal, multiplexing the radio frame to generate a radio transmission signal, and transmitting the radio transmission signal to the local station side radio transmission device via the opposite station side radio transmission / reception means;
Receives the reception command, stores the wireless channel setting information of the local station side wireless transmission device before the setting change in the second setting storage means on the opposite station side, and transmits the command reception notification signal of the local station side wireless transmission device A second line setting change unit on the opposite station side for changing the wireless line setting of the opposite station side wireless transmission device according to the received command,
The local station side wireless transmission device is:
The received radio signal transmitted from the opposite station side wireless transmission device is demodulated, the command reception notification signal is extracted from the demodulated wireless received signal, and the opposite setting command is transmitted to the second radio frame separating means and extracted. A first radio frame separation means for generating a command reception detection signal and outputting the command reception detection signal to the local station side setting command output means,
The local station side setting command output means receives the command reception detection signal, and transmits the setting change request signal as a device setting command to the first line setting changing means,
The device setting circuit receives the device setting command, stores the setting information of the local station side wireless transmission device before the setting change in the first setting storage means on the local station side, and according to the device setting command, the local station side wireless communication Change the wireless line setting of the transmission device,
The wireless transmission / reception means on the local station side and the other station side monitor whether or not the wireless line is disconnected. When the wireless line is detected to be disconnected, a line disconnection detection signal is sent to each of the first and the second Send to the line setting change means,
The first and second line setting change means receive the line disconnection detection signal, and read line setting information before changing the wireless line setting stored in the first and second setting storage means, respectively. A radio transmission system, wherein the radio channel settings of the radio transmission devices on the local station side and the other station side are returned to the radio channel settings before the change. A self-station-side wireless transmission device that includes a wireless transmission / reception unit in a local station facing one-to-one via a wireless line, and a counter-station-side wireless transmission device including a wireless transmission / reception unit in a counter-station facing the local station In the wireless transmission control method in the wireless transmission system for transmitting and receiving signals after matching the wireless line settings in advance,
A wireless channel setting change request command received from the control terminal is transmitted to the opposite station side wireless transmission device, a command reception notification signal indicating that the change request command has been received is transmitted to the own station side wireless transmission device, When transmission of the command reception notification signal to the local station side wireless transmission device is detected, in accordance with the change request command, changing a radio channel setting of the opposite station side wireless transmission device;
After receiving the command reception notification signal transmitted from the opposite station side wireless transmission device, changing the wireless channel setting of the local station side wireless transmission device according to the change request command;
In the local station side wireless transmission device, generating a counter station setting command for performing a channel setting change instruction of the counter station according to a change request signal for requesting a radio line setting change from the control terminal device;
Multiplexing the opposite station setting command and transmitting a first wireless transmission signal;
In the opposite station side wireless transmission device, separating the first wireless transmission signal, extracting and sending a command reception notification signal and a reception command corresponding to the opposite station setting command;
Receiving the command reception notification signal, multiplexing a radio frame to generate a radio transmission signal, and transmitting to the local station side wireless transmission device;
Receiving the reception command, storing the wireless channel setting information of the local station wireless transmission device before the setting change; and
Detecting whether or not the command reception notification signal is transmitted to the local radio transmission device;
When transmission of the command reception notification signal to the local station side wireless transmission device is detected, in accordance with the reception command, changing a radio channel setting of the opposite station side wireless transmission device;
In the local station side wireless transmission device, demodulating the reception wireless signal transmitted from the opposite station side wireless transmission device, and extracting a command reception notification signal from the demodulated wireless reception signal;
Detecting whether or not an opposing setting command is transmitted and extracted to the second radio frame separating means;
Generating and outputting a command reception detection signal when transmission and extraction of the opposing setting command is detected by the second radio frame separation means;
Receiving the command reception detection signal and transmitting the setting change request signal as a device setting command;
Receiving the device setting command, storing the setting information of the local station side wireless transmission device before the setting change, and changing the wireless line setting of the local station side wireless transmission device according to the device setting command;
In the wireless transmission / reception means on the local station side and the remote station side, monitoring whether or not the wireless line is disconnected;
When detecting a disconnection of a wireless line, a step of transmitting a line disconnection detection signal to the wireless transmitting / receiving means on the local station side or the other station side;
Receiving the line disconnection detection signal, respectively reading the stored line setting information before changing the wireless line setting, and returning the wireless line settings of the wireless transmission devices on the local station side and the other station side to the wireless line setting before the change. Steps,
A wireless transmission control method comprising:

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