JP2020136881A - Wireless device - Google Patents

Abstract

To provide a wireless device that can reduce power loss, appropriately select a wireless unit depending on a radio environment, and improve communication quality.SOLUTION: A wireless device includes: a wireless unit 1 and a wireless unit 2 for transmitting and receiving horizontal polarization and vertical polarization; and an antenna unit 3 and an antenna unit 4 for transmitting and receiving horizontal polarization and vertical polarization. An antenna connection terminal 1a for horizontal polarization of the wireless unit 1 is connected to a first feeding point 3a of the antenna unit 3, an antenna connection terminal 1b for vertical polarization of the wireless unit 1 is connected to a second feeding point 4b of the antenna unit 4, an antenna connection terminal 2a for horizontal polarization of the wireless unit 2 is connected to a first feeding point 4a of the antenna unit 4, and an antenna connection terminal 2b for vertical polarization of the wireless unit 2 is connected to a second feeding point 3b of the antenna unit 3. A control unit 5 switches between an active unit and a standby unit depending on states of the wireless units 1 and 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a wireless device, and more particularly to a wireless device capable of suppressing power loss in a transmission line between an antenna unit and a wireless device and further improving communication quality according to a wireless environment.

[Train radio system: Fig. 3]
Conventionally, there have been radio devices mounted on trains and used in train radio systems.
The schematic configuration of the train radio system will be described with reference to FIG. FIG. 3 is an explanatory diagram showing a schematic configuration of a train radio system.
As shown in FIG. 3, the train radio system includes a ground control device (command station) 61, a base station 62 arranged along the railway line, and a radio device 63 which is a mobile station mounted on the train.

The ground control device 61 monitors the operation status of each train and transmits and receives various information to and from the train.
The base station 62 is a base station device of a wireless system, performs wireless communication with a wireless device 63 which is a mobile station, and communicates with a ground control device 61 by wire.
The wireless device 63 receives control information from the ground control device 61 via the base station 62, outputs the control information to a control device (not shown) on the vehicle, and the control device performs control corresponding to the control information. ..
Further, the wireless device 63 transmits, for example, a response to the control information from the ground control device 61, position information detected by the train, speed information, and the like to the ground control device 61.

[Conventional wireless device: Fig. 4]
A conventional wireless device will be described with reference to FIG. FIG. 4 is a schematic configuration diagram of a conventional wireless device.
As shown in FIG. 4, the conventional wireless device includes radios 10 and 20, distribution synthesizers 30 and 40, and antenna units 50 and 60.

The radios 10 and 20 are radios that perform wireless communication with the ground control device 61, respectively. That is, the wireless device is provided with two active and spare wireless devices between the wireless device and the ground control device 61, and is a highly reliable communication system by making the device redundant.

Conventionally, one radio 10 or radio 20 is selected by control from the ground control device 61 or the control device on the train, the selected radio operates as a working radio, and the other radio operates as a spare. It is supposed to wait. Here, the radio 10 is used and the radio 20 is used as a spare.
The radio is selected, for example, to switch to the other (spare) radio when a problem occurs in the current radio. Although the switching control is performed by the control device, it is not shown in FIG.

The radios 10 and 20 are radios that transmit and receive horizontally polarized waves (H) and vertically polarized waves (V), respectively. The radio 10 includes a horizontally polarized antenna connection terminal 10a and a vertically polarized antenna connection terminal 10b, and the radio 20 includes a horizontally polarized antenna connection terminal 20a and a vertically polarized antenna connection terminal 20b. And have.

The distribution synthesizer 30 includes input / output terminals 30a, 30b, and 30c, and performs distribution synthesis of horizontally polarized waves.
Generally, the distribution synthesizer 30 synthesizes the horizontal polarization input from the radio 10 and the radio 20 via the input / output terminals 30a and 30b at the time of transmission, and connects the input / output terminal 30c to the antenna unit 50. Output.
However, since transmission is from either the radio 10 or the radio 20, the transmission signal from either the radio 10 or the radio 20 and the other no signal (substantially thermal noise) are transmitted. ) Will be synthesized.
At the time of reception, the horizontally polarized waves from the input / output terminals 30c are distributed and output to the radios 10 and 20 via the input / output terminals 30a and 30b.

Similarly, the distribution synthesizer 40 includes input / output terminals 40a, 40b, and 40c, and performs distribution synthesis of vertically polarized waves.
At the time of transmission, the distribution synthesizer 40 synthesizes the vertically polarized waves input from the radio 10 and the radio 20 via the input / output terminals 40a and 40b, and outputs the vertically polarized light from the input / output terminal 40c to the antenna unit 60.
However, since transmission is from either the radio 10 or the radio 20, the transmission signal from either the radio 10 or the radio 20 and the other no signal (substantially thermal noise) are transmitted. ) Will be synthesized.
At the time of reception, the vertically polarized waves from the input / output terminals 40c are distributed and output to the radios 10 and 20 via the input / output terminals 40a and 40b.

A changeover switch may be used instead of the distribution synthesizers 30 and 40 described above. In this case, although not particularly shown in the conventional wireless device, the distribution synthesizer 30 is used as a changeover switch, and at the time of transmission, the horizontal polarization from the currently operating wireless device 10 is output to the input / output terminal 30c and received. Occasionally, the horizontally polarized light from the input / output terminal 30c is output to the input / output terminal 30a connected to the current machine.
When the current machine and the spare machine are switched, the changeover switch connects the input / output terminal 30b and the input / output terminal 30c connected to the radio device 20 to perform horizontal polarization input / output.

Similarly, when the distribution synthesizer 40 is used as a changeover switch, the vertically polarized light from the radio 10 currently in operation is output to the input / output terminal 40c at the time of transmission, and the vertical polarization from the input / output terminal 40c is output at the time of reception. The polarization is output to the input / output terminal 40a connected to the current machine.
When the current machine and the spare machine are switched, the changeover switch connects the input / output terminal 40b and the input / output terminal 40c connected to the radio device 20 to perform vertically polarized input / output.

The antenna unit 50 includes a feeding point 50a and an antenna 50c for horizontally polarized waves.
The antenna unit 60 includes a feeding point 60a and an antenna 60c for vertically polarized waves.
Then, at the time of transmission, the horizontally polarized light input from the distribution synthesizer (or changeover switch) 30 via the feed point 50a is radiated from the antenna 50c, and is transmitted from the distribution synthesizer (or changeover switch) 40 via the feed point 60a. The input vertically polarized light is radiated from the antenna 60c.
At the time of reception, the horizontal polarization received by the antenna 50c is output from the feeding point 50a to the distribution synthesizer (or changeover switch) 30, and the vertical polarization received by the antenna 60c is output from the feeding point 60a to the distribution synthesizer (or switching). Switch) Output to 40.

In this way, diversity or MIMO (Multiple-Input and Multiple-Output) is achieved by performing distribution synthesis (or switching between active and preliminary operations) with the distribution synthesizers (or changeover switches) 30 and 40 for each polarization. It is possible to make a radio having a function redundant.

[Related technology]
As conventional techniques relating to a train radio system, JP-A-2009-67375 "Train Control System" (Patent Document 1) and JP-A-2012-90328 "Radio Control Method and Radio Control System" (Patent Document 2). There is.

Patent Document 1 is a train control system that performs simultaneous wireless communication between a ground control device and a plurality of on-board wireless control devices using a plurality of wireless communication paths, and one of the plurality of wireless communication paths is selected. It is described that the authentication request and the authentication process are performed, and the obtained encryption key is used as an encryption key common to a plurality of on-board wireless control devices.

Further, in Patent Document 2, different communication frequencies are assigned to a plurality of base stations installed along the railway line, and the mobile station searches for the communication frequency and communicates with the base station corresponding to the searched specific radio frequency. It is described that control information is transmitted and received.

JP-A-2009-67375 Japanese Unexamined Patent Publication No. 2012-90228

However, in the conventional wireless device, since the wireless device is made redundant by using a distribution synthesizer or a changeover switch, power loss occurs in the transmission line between the antenna unit and the wireless device, resulting in a decrease in transmission power and noise during reception. There is a problem that the index deteriorates and the signal-to-noise ratio decreases.

Further, in the conventional wireless device, if the route between the active system and the spare system is switched by a changeover switch or the like, the spare system wireless device stands by in the receiving state in the state of operating with the active system wireless device. Therefore, there is a problem that the reception state in the standby system cannot be grasped and a good radio cannot be selected according to the wireless environment.

In Patent Document 1 and Patent Document 2, two antenna units are provided for two radios, the distribution synthesizer is not required, and both the current machine and the spare machine can be received, and the control unit is in the receiving state. It is not stated that a good radio is selected as the working machine.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wireless device which does not generate power loss as a simple configuration, can appropriately select a wireless device by redundancy, and can obtain good communication quality. And.

The present invention for solving the problems of the above-mentioned conventional example includes first and second radios for transmitting and receiving horizontally polarized waves and vertically polarized waves, and one of the first radio and the second radio is provided. The working machine, the other is a radio device that operates as a spare machine, depending on the state of the first and second antenna units that transmit and receive horizontally polarized light and vertically polarized light, and the first and second radio devices. A control unit for switching between a working machine and a spare machine is provided, and a first terminal for inputting / outputting the horizontally polarized light of the first radio unit is connected to a feeding point of the horizontally polarized light of the first antenna unit. The second terminal for inputting / outputting the vertically polarized light of the first radio is connected to the feeding point of the vertically polarized light of the second antenna unit, and the first input / output of the horizontally polarized light of the second radio is input / output. The terminal is connected to the horizontally polarized feeding point of the second antenna unit, and the second terminal that inputs and outputs the vertically polarized light of the second radio is the vertically polarized feeding point of the first antenna unit. It is characterized by being connected to.

Further, according to the present invention, in the above radio device, the first and second radios perform a reception operation even when operating as a spare device, and the control unit determines the reception state of the first and second radios. It is characterized by monitoring and selecting the one with the best reception condition as the current machine.

Further, the present invention is characterized in that the first antenna unit and the second antenna unit are separately installed in the wireless device.

According to the present invention, the first and second radios for transmitting and receiving horizontally polarized waves and vertically polarized waves are provided, and one of the first radio and the second radio operates as a working machine and the other as a spare machine. Control to switch between the current machine and the spare machine according to the state of the first and second antenna units that transmit and receive horizontally polarized light and vertically polarized light, and the first and second radio devices. The first terminal for inputting / outputting the horizontally polarized light of the first radio unit is connected to the feeding point of the horizontally polarized light of the first antenna unit, and the vertically polarized light of the first radio unit is provided. The second terminal for input and output is connected to the feeding point of the vertically polarized light of the second antenna unit, and the first terminal for inputting and outputting the horizontally polarized light of the second radio is the second antenna unit. Since the second terminal connected to the horizontally polarized feeding point and inputting and receiving the vertically polarized light of the second radio is a wireless device connected to the vertically polarized feeding point of the first antenna unit. This has the effect of realizing the redundancy of the radio without using a composite distributor or a changeover switch, and preventing power loss, a decrease in transmission power, and deterioration of the noise index during reception.

Further, according to the present invention, the first and second radios perform a reception operation even when operating as a spare machine, and the control unit monitors the reception state of the first and second radios. Since the above wireless device is used to select the one with the better reception condition as the current device, it is possible to perform communication using the wireless device with the better reception condition according to the communication environment, and it is possible to improve the communication quality. There is an effect that can be done.

Further, according to the present invention, since the first antenna unit and the second antenna unit are the wireless devices installed apart from each other, there is an effect of spatial diversity.

It is explanatory drawing which shows the schematic structure of this wireless device. It is a flowchart which shows the monitoring process of the reception level in the control unit 5. It is explanatory drawing which shows the schematic structure of the train radio system. It is a schematic block diagram of a conventional wireless device.

Embodiments of the present invention will be described with reference to the drawings.
[Outline of Embodiment]
The radio device (the present radio device) according to the embodiment of the present invention includes first and second radios that transmit and receive horizontally polarized light and vertically polarized light, and first and second radio devices that transmit and receive horizontally polarized light and vertically polarized light. A first terminal provided with a second antenna unit and inputting / outputting the horizontally polarized light of the first radio unit is connected to a feeding point of the horizontally polarized light of the first antenna unit, and the first radio unit has a second antenna unit. The second terminal for inputting / outputting vertically polarized light is connected to the feeding point of vertically polarized light of the second antenna unit, and the first terminal for inputting / outputting horizontally polarized light of the second radio is the second terminal. The second terminal that is connected to the horizontally polarized feeding point of the antenna unit of the antenna unit and inputs and outputs the vertically polarized light of the second radio is connected to the vertically polarized feeding point of the first antenna unit and is controlled. The unit switches between the current machine and the spare machine according to the state of each radio device, realizes redundancy of the radio device without using a distribution synthesizer or a changeover switch, suppresses power loss, and communicates environment. It is possible to switch the radio device according to the above and improve the communication quality.

[Configuration of this wireless device: Fig. 1]
The configuration of this wireless device will be described with reference to FIG. FIG. 1 is an explanatory diagram showing a schematic configuration of the wireless device.
In the following embodiment, the case where this wireless device is used in the train radio system shown in FIG. 3 will be described as an example, but the present invention is not limited to this, and can be applied to other wireless systems.
As shown in FIG. 1, this radio device includes radios 1 and 2, antenna units 3 and 4, and a control unit 5.
By using the two antenna units 3 and 4, the distribution synthesizer and the changeover switch are not required, and the power loss can be suppressed.

Each part of this wireless device will be described.
The radios 1 and 2 are radios that transmit and receive both horizontally polarized waves (H) and vertically polarized waves (V) as in the conventional case, and one of the radios selected by the control unit 5 operates as a working machine. The other is a spare machine. Here, the radio 1 will be described as a working machine.
The radio 1 includes a horizontally polarized antenna connection terminal 1a and a vertically polarized antenna connection terminal 1b, and the radio 2 includes a horizontally polarized antenna connection terminal 2a and a vertically polarized antenna connection terminal 2b. And have.

Further, the antenna units 3 and 4 are antenna devices that transmit and receive both horizontally polarized waves and vertically polarized waves.
The antenna unit 3 includes a first feeding point 3a and a second feeding point 3b, the first feeding point 3a is connected to the horizontally polarized antenna 3c (antenna 3c), and the second feeding point 3b Is connected to the vertically polarized antenna 3d (antenna 3d).
Here, the first feeding point 3a is for horizontal polarization, and the second feeding point 3b is for vertical polarization.
In the drawing, the horizontally polarized antenna 3c (antenna 3c) and the vertically polarized antenna 3d (antenna 3d) are shown for the sake of clarity in explaining the signal flow, but the antenna unit is actually used. It is realized by the antenna element in 3. Further, in the case of different polarized waves such as horizontally polarized waves and vertically polarized waves, it is possible to realize antenna characteristics corresponding to the respective polarized waves from the same antenna element.

Similarly, the antenna unit 4 includes a first feeding point 4a and a second feeding point 4b, the first feeding point 4a is connected to the horizontally polarized antenna 4c (antenna 4c), and the second feeding point 4a is connected. The feeding point 4b is connected to the vertically polarized antenna 4d (antenna 4d). Here, the first feeding point 4a is for horizontal polarization, and the second feeding point 4b is for vertical polarization.
Similarly to the above, in the drawing, the horizontally polarized antenna 4c (antenna 4c) and the vertically polarized antenna 4d (antenna 4d) are shown for the sake of clarity in explaining the signal flow, but they are actually Is realized by the antenna element in the antenna unit 4. Further, in the case of different polarized waves such as horizontally polarized waves and vertically polarized waves, it is possible to realize antenna characteristics corresponding to the respective polarized waves from the same antenna element.

At the time of transmission, the horizontally polarized light output from the current radio 1 is input from the horizontally polarized antenna connection terminal 1a to the first feeding point 3a of the antenna unit 3 and radiated from the horizontally polarized antenna 3c. Will be done.
Further, the vertically polarized light output from the radio 1 is input from the vertically polarized antenna connection terminal 1b to the second feeding point 4b of the antenna unit 4 and radiated from the vertically polarized antenna 4d.

At the time of reception, the horizontally polarized light received by the horizontally polarized antenna 3c of the antenna unit 3 is output to the radio 1 from the first feeding point 3a, and the vertically polarized light received by the vertically polarized antenna 3d is , It is output to the radio 2 from the second feeding point 3b.
Further, the horizontally polarized light received by the horizontally polarized antenna 4c of the antenna unit 4 is output to the radio 2 from the first feeding point 4a, and the vertically polarized light received by the vertically polarized antenna 4d is It is output to the radio 1 from the second feeding point 4b.
That is, in this wireless device, the standby wireless device 2 can also be in a state of being able to receive at all times.
Normally, the control unit 5 adopts the data received by the current machine as the reception data, but the reception quality may be improved by using the reception data in the spare machine as well.

The control unit 5 monitors the status (failure, etc.) of the radios 1 and 2 and controls to switch between the current machine and the spare machine as in the conventional case. The broken line shown in FIG. 1 indicates a control signal from the control unit 5 to the radios 1 and 2.

Further, as a feature of this wireless device, for example, the control unit 5 monitors the transmission output of the current machine and the reception strength of the current machine and the spare machine, so that the transmission output of the current machine is lowered or the reception strength is lowered. In that case, the current machine is used as a spare machine, and the radio that was the spare machine is switched to the current machine.

At that time, the control unit 5 controls the radio selected as the current machine to perform the transmission operation, and controls the spare machine so as not to perform the transmission operation. It is possible for both radios to perform the reception operation regardless of whether it is in use or in reserve.

In particular, in this wireless device, since the spare machine can stand by while performing the reception operation, the control unit 5 detects and compares the reception states of the current machine and the spare machine, and the better one is the current machine. It is possible to select as.
Specifically, the control unit 5 obtains the reception strength of the horizontal polarization and the vertical polarization of the current radio 1 and the reception strength of the horizontal polarization and the vertical polarization of the spare radio 2, and each radio. Select the one with the better overall reception strength as the current machine.
Alternatively, when the reception intensity of the current machine becomes lower than a preset constant level, the current machine and the spare machine may be switched.

As a result, in this wireless device, even if there is no problem with the wireless device itself, a wireless device capable of obtaining better communication quality can be selected as the current device depending on the wireless environment.
If the control unit 5 switches between the current machine and the spare machine instead of the instruction from the ground control device, the control unit 5 notifies the ground control device to that effect.

Further, the control unit 5 may detect a defect in the antenna in monitoring the reception state of the radios 1 and 2, and switch between the current machine and the spare machine based on the problem.
Specifically, the control unit 5 includes a horizontally polarized antenna connection terminal 1a of the radio 1, a vertically polarized antenna connection terminal 1b, a horizontally polarized antenna connection terminal 2a of the radio 2, and a vertically polarized antenna. When the reception strength from any of the four connection terminals of the connection terminal 2b is significantly reduced, it is detected that a problem has occurred in the antenna of the antenna unit connected to the connection terminal.
Further, although the detection in the reception state has been described above, as another method, a defect of the antenna may be detected from the reflected wave of the transmission signal by measuring the voltage standing wave ratio (VSWR) in the transmission state. ..

Then, when a problem such as a failure occurs in any of the antennas 3c and 3d of the antenna unit 3 and the antennas 4c and 4d of the antenna unit 4, the current machine and the spare machine are switched so as not to use the antenna. Take control.
For example, when a problem occurs in the antenna 4d of the antenna unit 4 and the control unit 5 detects it, the radio 1 connected to the antenna 4d is used as a spare machine and the radio 2 is used as a working machine.
As a result, transmission / reception with horizontally polarized waves and vertically polarized waves can be performed without using a defective antenna.

Furthermore, when the control unit 5 detects that one of the antenna units 3 and 4 has failed, the control unit 5 performs not only a reception operation but also a transmission operation to the radio set as the spare unit at that time. It is also possible to instruct them to do so.
For example, horizontal polarization reception from the antenna unit 3 (input from the horizontal polarization connection terminal 1a of the radio 1) and vertical polarization reception (input from the vertical polarization antenna connection terminal 2b of the radio 2). ) Are significantly reduced, the control unit 5 detects that the antenna unit 3 has failed.

In this case, the control unit 5 controls the radio 2 currently set as the spare device to perform the transmission operation.
As a result, in this radio device, the horizontally polarized light from the radio 2 and the vertically polarized light from the radio 1 can be transmitted by using only the antenna unit 4, and even if one of the antenna units fails. Transmission and reception can be performed with both polarizations.

Here, further features of the configuration of the present invention will be described with respect to the radio 1 and the radio 2, the antenna unit 3 and the antenna unit 4, the antenna 3c and the antenna 3d, the antenna 4c and the antenna 4d.
When realizing a redundant configuration without using a distribution synthesizer or a changeover switch in order to suppress power loss, for example, as in the conventional case, one antenna unit is for horizontal polarization and the other antenna unit is for vertical polarization. A configuration is also conceivable.

However, in that case, due to the characteristics of the antenna elements, two antenna elements corresponding to each radio are required in each antenna unit. That is, two antenna elements must be arranged side by side in each antenna unit, and the antenna unit becomes large.

On the other hand, when trying to realize antenna characteristics of different polarizations in one antenna unit as in the configuration of the present invention, a plane antenna having common polarizations can be used, and it can be done from one antenna element. This can be achieved simply by connecting to different feeding points for horizontally polarized waves and vertically polarized waves. That is, by adopting the configuration of the present invention, the antenna unit can be miniaturized, the arrangement space of the antenna unit can be reduced, and the degree of freedom in installation of the antenna unit and the ease of installation are greatly contributed.

[Processing of control unit 5: FIG. 2]
Next, the reception level monitoring process in the control unit 5 of the wireless device will be described with reference to FIG. FIG. 2 is a flowchart showing a reception level monitoring process in the control unit 5.
As shown in FIG. 2, the control unit 5 of the radio device acquires the reception intensities of both polarizations of the radio 1 and the radio 2 to obtain the total reception strength of each radio (S1).
Then, the control unit 5 compares the reception intensities of the radio 1 and the radio 2 (S2), determines whether the current device has a better reception state (higher reception strength) (S3), and is in use. When the reception condition of the machine is better (when the reception strength is high, in the case of Yes), the process returns to process S1 and monitoring is continued.

Further, when the reception state of the spare device is better in the process S3 (when No), the control unit 5 switches between the current device and the spare device, and transmits to the radio device newly set as the current device. Is output, and an instruction is output to the radio set as the spare device to stop the transmission operation (S4).
Then, the control unit 5 shifts to the process S1 and monitors the reception intensity.
As a result, the radio with good reception quality can be selected as the working machine from the two radios.

[Arrangement of antenna unit]
Since this wireless device includes two antenna units 3 and 4, the effect of spatial diversity can be sufficiently obtained by installing the antenna units 3 and 4 apart from each other.
For example, when the wireless device is mounted on a train, the antenna unit 3 is installed on the left side of the front of the train, and the antenna unit 4 is installed on the right side of the front of the train.
Depending on the wireless environment, the communication quality may differ depending on the combination of polarization and antenna position, and the control unit 5 monitors the reception status and switches between the current machine and the spare machine so that better quality can be obtained. It is also possible to control to switch.

Specifically, in the radio 1, the horizontally polarized wave is transmitted and received on the right side of the front surface of the vehicle, and the vertically polarized wave is transmitted and received on the left side of the front surface of the vehicle. It will be sent and received.
In this wireless device, the control unit 5 can compare the reception strengths of each wireless device and set the one that can obtain good communication quality as the active device.

[Comparison with conventional wireless devices]
Here, the effect of the wireless device will be described by comparing the conventional wireless device with the wireless device.
The conventional wireless device shown in FIG. 3 includes distribution synthesizers 30 and 40 (or changeover switches), which causes a large power loss and a decrease in line gain, whereas this wireless device has distribution synthesis. It is not equipped with a device or a changeover switch, which can prevent power loss and suppress a decrease in line gain.

Further, in the conventional wireless device, if one of the antennas in the antenna unit 50 fails, the polarization of one of them is cut off. However, as described above, this wireless device does not use the failed antenna. As described above, by switching between the current machine and the spare machine, transmission and reception can be continuously performed with both polarizations.

Further, in the conventional wireless device, if the antenna unit 50 itself fails, the wireless transmission / reception is completely cut off, but in this wireless device, the control unit 5 controls the spare device to also perform the transmission operation. By doing so, it is possible to perform transmission / reception using both polarizations using the remaining antenna unit.

Furthermore, in the conventional wireless device, even if two wireless devices are provided, only the current device performs transmission / reception operation, but in this wireless device, the spare device also performs the reception operation to perform the current operation. Multiple reception is possible between the machine and the spare machine.
Thereby, for example, the signals received by the radios 1 and 2 can be combined, and the control unit 5 can perform processing such as noise removal to improve the reception quality.

Further, even if the control unit 5 is configured not to perform voluntary monitoring, for example, when the working machine cannot receive the signal from the ground control station 61 and cannot respond, the ground control station 61 concerned. When the situation is recognized and an instruction to switch between the current machine and the spare machine is transmitted to the wireless device, the spare machine receives the instruction and outputs the instruction to the control unit 5, and the control unit 5 receives the instruction and outputs the instruction to the current machine and the spare machine. Can be switched.

[Effect of Embodiment]
According to this radio device, the radio 1 and the radio 2 for transmitting and receiving horizontally polarized waves and vertically polarized waves, and the antenna unit 3 and the antenna unit 4 for transmitting and receiving horizontally and vertically polarized waves are provided. The horizontally polarized antenna connection terminal 1a is connected to the first feeding point 3a of the antenna unit 3, and the vertically polarized antenna connection terminal 1b of the radio 1 is connected to the second feeding point 4b of the antenna unit 4. Connected, the horizontally polarized antenna connection terminal 2a of the radio 2 is connected to the first feeding point 4a of the antenna unit 4, and the vertically polarized antenna connection terminal 2b of the radio 2 is the first antenna unit 3. It is connected to the feeding point 3b of 2 and the control unit 5 switches between the current machine and the spare machine according to the state of the radios 1 and 2, and the radio is redundant without using a distribution synthesizer or a changeover switch. This has the effect of reducing power loss, enabling switching of radios according to the communication environment, and improving communication quality.

According to this wireless device, the radios 1 and 2 stand by in a state of performing a reception operation even when they are set as spare devices, and the control unit 5 compares the reception qualities of the radios 1 and 2 and determines the reception quality. Since the better one is set as the current device, a better wireless device can be set as the current device according to the wireless environment and the like, and there is an effect that good communication can be performed.

Further, according to this wireless device, since the two antenna units 3 and 4 are provided, the effect of spatial diversity can be obtained by installing the antenna units 3 and 4 apart from each other, for example, on the right side and the left side of the train. It is what you get.

The present invention is suitable for a wireless device capable of suppressing power loss, appropriately selecting a wireless device according to a wireless environment, and improving communication quality.

1,2,10,20 ... Radio, 3,4,5,60 ... Antenna unit, 5 ... Control unit, 30,40 ... Distribution synthesizer, 1a, 2a, 10a, 20a ... Antenna connection terminal for horizontal polarization , 1b, 2b, 10b, 20b ... Vertically polarized antenna connection terminals, 3a, 3b, 4a, 4b, 50a, 60a ... Feeding points, 30a, 30b, 30c, 40a, 40b, 40c ... Input / output terminals, 61 ... Ground control station, 62 ... base station, 63 ... wireless device

Claims (3)

A radio device that includes first and second radios that transmit and receive horizontally polarized waves and vertically polarized waves, one of the first radio and the second radio operating as a working machine and the other as a spare machine. There,
The first and second antenna units that transmit and receive horizontally polarized waves and vertically polarized waves,
A control unit for switching between a working machine and a spare machine according to the state of the first and second radios is provided.
The first terminal for inputting / outputting the horizontally polarized light of the first radio is connected to the feeding point of the horizontally polarized light of the first antenna unit, and the vertically polarized light of the first radio is input / output. The second terminal is connected to the feeding point of the vertically polarized light of the second antenna unit, and the first terminal for inputting and outputting the horizontally polarized light of the second radio is the second antenna unit. The second terminal that is connected to the horizontally polarized feeding point of the second radio and inputs and outputs the vertically polarized light of the second radio is connected to the vertically polarized feeding point of the first antenna unit. A featured wireless device. The first and second radios also perform reception operations when operating as spares.
The radio device according to claim 1, wherein the control unit monitors the reception state of the first and second radio devices and selects the one with the better reception state as the current device. The wireless device according to claim 1 or 2, wherein the first antenna unit and the second antenna unit are installed apart from each other.

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