JP2003032739A - Mobile wireless communication apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile wireless communication apparatus having functions of both a terminal station and a relay station for a long-distance wide-range mobile wireless communication in order to do search and rescue activities flexibly using a plurality of aircrafts. SOLUTION: The mobile wireless communication apparatus can be used as a terminal station and as a repeater station by switching a plurality of directive antennae 201 and 202 according to opposite stations to make a communication. In this apparatus, an antenna control device 209 performs directivity control and switching control of the antennae 201 and 202 on the basis of data of position between the apparatus and opposite stations. The apparatus is used as a terminal station and as a relay station by switching a control program 216 between cases that it functions as a terminal station and as a repeater station. Meanwhile, in this apparatus, to prevent the attenuation in transmission at a radio wave frequency between the antennae 201, 202 and the transmitter/ receiver, sections 203 and 204 each of which is commonly used for amplification and transmission/reception are arranged near the antennae 201 and 202, and the frequency is converted into an intermediate frequency between the antennae and the transmitter/receiver.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio communication device, and more particularly to a mobile radio communication device for both a relay station and a terminal station used for long-distance wideband mobile radio communication.

[0002]

2. Description of the Related Art Conventionally, aircraft such as helicopters (hereinafter,
In video shooting / transmission such as TV relay by an aircraft, etc., a relay station that can move in the air from a terminal station (hereinafter, terminal station) such as a camera to a ground station (aircraft such as a relay station, etc. In many cases, the transmission distance was limited. Also, when transmitting directly without a relay station,
In addition to the distance limitation, when the terminal flies in the low altitude, radio waves are blocked due to the influence of topography etc. and it is not possible to transmit, or the range of action of the terminal is limited to avoid radio wave shielding. There has occurred.

Therefore, at present, in order to extend the communication distance or avoid the obstacle to perform the relay, a fixed relay station or a movable relay station may be used.

In many cases, an omnidirectional antenna that does not require directivity control to the opposite station is used as the antenna of the terminal station and the relay station. However, when mounted on an aircraft or the like (especially when mounted on a small aircraft), there is a limitation in extending the transmission distance by a method such as increasing the transmission output due to heat radiation problems, power consumption restrictions, and the like. Therefore, a method using a directional antenna having a long transmission distance with respect to power consumption may be adopted. The use of the directional antenna is effective not only for reducing interference and interference with other communication systems but also for effective use of frequency resources.

However, when using a directional antenna,
It is necessary to confirm the position of the ground station or the relay station for the terminal station, the position of the terminal station and the ground station for the relay station, and the position of the terminal station or the relay station for the ground station to control the direction of the antenna.

Further, the directional antenna has a problem that radio waves are blocked by its own body or the like when a terminal station or a relay station communicates while moving or turning. Especially when the aircraft is equipped with a directional antenna for communication,
Except when the antenna is large and low-speed and the antenna can be largely projected out of the aircraft by a pillar or the like, the directional antenna shields (blanks) radio waves due to the shape and attitude of the aircraft and the relative azimuth with the opposite station. In order to avoid this, a method is used in which two or more are mounted and used while being connected to the transceiver.

In the case where the conventional relatively long-distance / high-speed communication is not performed, a transmitter / receiver in which an amplification / transmission / reception common unit and a transmission / reception unit are integrated is used. For this reason, in high-speed data communication using the high-frequency band, there is a problem of high-frequency signal attenuation due to the cable between the antenna and the transceiver, or to avoid attenuation of the high-frequency signal due to the cable between the antenna and the transceiver. There is a problem that installation positions of the transceiver and the antenna are limited.

Further, since the respective functions of the mobile radio communication device for the terminal station and the relay station are dedicated to each other and the one for the terminal station cannot be used for the relay station, it is possible to flexibly respond to the situation. Is difficult.

FIG. 4 shows a conventional directional antenna 201, 2
The example of the mobile radio communication apparatus system diagram for terminal stations using 02 is shown. Normally, the amplification / transmission / reception shared unit 204 and the transmission / reception unit 208
Are integrated as a transceiver 221.

FIG. 4 shows two directional antennas 201, 2
02, an example of a device that switches and uses the directional antennas 201 and 202 depending on the positional relationship between the own device and the opposite station (relay station or ground station) in order to prevent the radio wave from being shielded by the own body or the like is shown. ing. The transmitter / receiver 221 in which the amplification / transmission / reception common unit 204 and the transmission / reception unit 208 are integrated and the directional antennas 201 and 202 are connected by a signal cable, and a signal is transmitted at a radio frequency (high frequency) between them. In the system in which the amplification / transmission / reception common unit 204 and the transmission / reception unit 208 are integrated as the transmitter / receiver 221, a signal from the transmitter / receiver to the antenna is transmitted at a high frequency depending on the mounting restrictions and the mounting positions of the installed aircraft. Signal cables often require a length of several meters or more. Further, although two directional antennas 201 and 202 are provided, the amplification / transmission / reception shared unit 204, the transmission / reception unit 208, and the encoder / decoder 210 have only one system, and the directional antennas 201 and 20 are provided.
Only one of the two can be used for one opposite station.

FIG. 6 shows an amplification / transmission / reception sharing unit 204 of a conventional mobile radio communication device for a terminal station. Amplifying / transmitting / receiving unit 204
Is an antenna transmission / reception shared unit 301 and a transmission power amplifier 30.
2, transmission filter 303, reception filter 304, transmission frequency converter 305, reception frequency converter 306,
It is composed of a low noise amplifier 307 and a local oscillator 308. Normally, the terminal station communicates not only with the relay station but also directly with the ground station without going through the relay station. Therefore, the transmission filter 303 corresponding to the two types of frequencies matched with the respective opposite stations, the reception filter 303 The filter 304 and the local oscillator 308 corresponding to the frequency used for transmission and reception are provided.

FIG. 5 is a system diagram of a conventional mobile radio communication device for a relay station (in this example, a directional antenna 201 for the opposite terminal,
202 shows the case where the omnidirectional antenna 222 is used for the ground station). Normally, the amplification / transmission / reception shared unit 203, 2
25 and the transmission / reception units 207 and 224,
It is integrated as 23.

The mobile radio communication device for relay station of FIG. 5 uses two directional antennas 201 and 202 for the opposite end station, and in order to prevent the radio wave from being shielded by its own body or the like, The directional antenna is switched and used according to the positional relationship of stations. Amplification / transmission / reception common unit 203 and transmission / reception unit 20 for opposite terminals
The transmitter / receiver 224 that integrates 7 is a directional antenna 20.
1, 202 are connected with a signal cable, and a signal is transmitted at a radio frequency (high frequency) between them. In this way, the amplification / transmission / reception common unit 203 and the transmission / reception unit 207 are connected to the transmitter / receiver 22.
In the method of integrating as 4, the signal cable for transmitting a high frequency signal between the transceiver 224 and the directional antennas 201 and 202 needs to have a length of several meters or more depending on the mounting restrictions and the mounting positions of the installed aircraft. Often becomes. Further, there is only one communication system corresponding to the directional antennas 201 and 202, and while one directional antenna is communicating, the other directional antenna cannot communicate.

FIG. 7 shows an amplification / transmission / reception sharing section 203 for the end station of the mobile radio communication apparatus for the relay station. Amplifying / transmitting / receiving unit 2
03 is an antenna transmission / reception common unit 301, a transmission power amplifier 302, a transmission filter 303, and a reception filter 30.
4, transmission frequency converter 305, reception frequency converter 3
06, a low noise amplifier 307, and a local oscillator 308. Normally, it is assumed only to communicate with a terminal station, and therefore only a transmission filter 303 and a reception filter 304 corresponding to radio waves of one type of frequency, and a local oscillator 308 corresponding to a frequency used for transmission and reception are provided. Absent.

The mobile radio communication device for relay stations shown in FIG. 5 has an omnidirectional antenna 22 as an antenna for ground stations.
I am using 2. Also in this case, the transmission / reception unit 224 and the amplification / transmission / reception shared unit 225 are generally used as the transmission / reception unit 223 as one unit.

FIG. 8 shows an amplification / transmission / reception shared unit 225 for ground stations of the mobile radio communication device for relay stations. The amplification / transmission / reception shared unit 225 includes an antenna transmission / reception shared unit 301, a transmission power amplifier 302, a transmission filter 303, and a reception filter 30.
4, transmission frequency converter 305, reception frequency converter 3
06, a low noise amplifier 307, and a local oscillator 308. Since only the case of communicating with the ground station is assumed, only the transmitting filter 303 and the receiving filter 304 corresponding to one type of frequency, and the local oscillator 308 corresponding to the frequency used for transmission and reception are provided.

As described above, in the conventional mobile radio communication device for terminal station and mobile radio communication device for relay station, the function thereof and the opposite station of each antenna are dedicated.

When a long-distance or wide-area reconnaissance is carried out by a plurality of aircrafts using the conventional radio communication device dedicated to the terminal station and the relay station dedicated to the functions of the terminal station and the relay station shown above, Depending on the type of equipment installed in the terminal of the aircraft, the role of the relay station is fixed. That is, if the device is not replaced, it cannot be used for a terminal station or a relay station, so that it is not possible to flexibly cope with the situation.

Further, in the case of communicating using a directional antenna, considering the size and weight of the antenna that can be mounted on an aircraft or the like, it is advantageous that the directional gain becomes larger as the frequency band is higher. However, as the frequency band becomes higher, the absorption loss due to the atmosphere, water vapor, etc., cable propagation loss, and the emission radio wave power efficiency with respect to power consumption will be disadvantageous, so the frequency band used should be a high frequency band suitable for the communication system. To be done.

However, in the conventional mobile radio communication device described above, the length of the signal cable between the antenna and the transmitter / receiver may become long due to restrictions such as the installation positions of the antenna and the transmitter / receiver in the aircraft. Therefore, transmission of a signal at a high-frequency radio frequency in the cable has a large loss, and particularly when long-distance communication is performed in a wide band such as an image in a high frequency band, the influence of signal attenuation in the cable becomes large. Further, in order to prevent the signal from being attenuated by this cable, there is a restriction on the installation in which the antenna and the transmitter / receiver must be installed close to each other, which causes a problem that a free installation layout cannot be performed.

[0021] Usually, in order to transmit high-speed data such as video over a long distance, it is necessary to communicate using a directional antenna at a high frequency such as SHF, but low speed such as own position and communication status. In the case of data, it may not be necessary to transmit and receive with the same frequency and directional antenna as the image because it is easy to communicate, and there are cases where an omnidirectional antenna can be used at a low frequency such as VHF. In such a case, the circuit system using the directional antenna, etc.
Only a transmission system for video and the like is required, and a common antenna transmission / reception unit for transmission / reception is not required, which is simplified. However, in terms of system construction, a system using low-frequency and omnidirectional antennas will be used in combination, and a device (oscillator, oscillator,
Many systems in a wide area that require the same frequency via an omnidirectional antenna, in addition to requiring a modulator / demodulator, an amplifier, an antenna, etc.) It is expected that there will be a lot of noise from the above, and eventually it will not be available due to a tight frequency, etc.

[0022]

SUMMARY OF THE INVENTION An object of the present invention is to provide a plurality of aircraft or the like in order to flexibly respond to a fluid situation where there is no prior information at the time of a disaster or the like and to carry out swift wide-area investigation / monitoring activities. It is an object of the present invention to provide a mobile radio communication device that has both functions of a terminal station and a relay station and can perform communication while flexibly changing the functions according to the situation.

Another object of the present invention occurs in a signal cable between an antenna section and a transmitting / receiving section when high-speed data such as video is communicated over a long distance in a high frequency / wide band using a directional antenna. It is an object of the present invention to provide a mobile radio communication device capable of reducing attenuation during transmission of a high frequency signal to a negligible range.

[0024]

[Means for Solving the Problems] Means for solving the problems will be described below with reference to the numbers and symbols used in the embodiments of the present invention. These numbers and signs are added to clarify the correspondence between the description in [Claims] and the description in [Embodiment of the Invention], but in [Claims] It should not be used to interpret the technical scope of the described invention.

The mobile radio communication of the present invention is installed in mobile equipment including an apparatus aircraft, and is used for the terminal station 101 and the relay station 102.
Having both functions for the terminal station 101 and the relay station 1
02, and a plurality of switchable directional antennas 201 used for communication with a plurality of opposite stations including the ground station 103,
202 is provided. In the prior art, multiple directional antennas differ from the present invention in that they only communicate with a particular opposite station.

The mobile radio communication device of the present invention is installed in the mobile equipment including the aircraft and has both functions for the terminal station 101 and the relay station 102, and the terminal station 10
1. The switchable directional antennas 201 and 202 used for communication with the plurality of opposite stations including the relay station 102 and the ground station 103, and the plurality of directional antennas 201 and 202. A communication system used for transmission and reception, and an antenna control device 209 for controlling the directivity of the plurality of directional antennas 201 and 202 and controlling the switching of the communication system are provided.

The plurality of directional antennas 201 and 202
When the first directional antenna 201 of the plurality of directional antennas 201 is used for communication with the first opposite station 101 of the plurality of opposite stations, the second directional antenna 201 of the plurality of directional antennas 201 and 202 is used. The directional antenna 202 can be used for communication with the second opposite station 103 of the plurality of opposite stations. In addition, the first directional antenna 201
However, when used for communication with the second opposite station 103, the second directional antenna 202 can be used for communication with the first opposite station 101.

The communication system of the mobile radio communication device is
A plurality of amplification / transmission / reception common units 203, 20 installed corresponding to the plurality of directional antennas 201, 202, respectively.
4, a plurality of transmission / reception units 207 and 208 installed corresponding to the plurality of opposite stations, and switches 205 and 2, respectively.
And 06.

The switches 205 and 206 are connected to the first switch.
When the second directional antenna 201 communicates with the first opposite station 101 and the second directional antenna 202 communicates with the second opposite station 103, the corresponding directional antenna 201 corresponds to the first directional antenna 201. The amplification / transmission / reception shared unit 203 is connected to the transmission / reception unit 207 corresponding to the first opposite station 101, and the amplification / transmission / reception shared unit 204 corresponding to the second directional antenna 202 is connected to the second It is switched to connect to the transmitting / receiving unit 208 corresponding to the opposite station 103.

When the first directional antenna 201 communicates with the second opposite station 103 and the second directional antenna 202 communicates with the first opposite station 101, the first directional antenna 201 is used. The amplification / transmission / reception shared unit 203 corresponding to the directional antenna 201 is connected to the transmission / reception unit 208 corresponding to the second opposite station 103, and the amplification / transmission / reception shared corresponding to the second directional antenna 202 is shared. Part 204
Is the transmitter / receiver 2 of the previous term corresponding to the first opposite station 101.
It is switched to connect with 07.

The plurality of amplifications of the mobile radio communication device
Each of the transmission / reception sharing units 203 and 204 has a plurality of switchable reception filters 304 provided corresponding to a plurality of radio wave frequencies used for reception with the plurality of opposite stations.
A plurality of switchable transmission filters 303 provided corresponding to a plurality of radio wave frequencies used for transmission with the plurality of opposite stations, and a plurality of radio waves used for transmission and reception with the plurality of opposite stations. And a plurality of switchable local oscillators 308 provided corresponding to frequencies.

In the antenna control device 209 of the mobile radio communication device, the mobile radio communication device is the terminal station 101.
And a terminal station control program 216 (for terminal station) that is used when communicating with one of the opposite stations, and the mobile radio communication device relays communication with the plurality of opposite stations as the relay station 102. And a relay station control program 216 (for relay station) used for.

In the antenna control device 209 of the mobile radio communication device, the mobile radio communication device is the terminal station 101.
The first directional antenna 20 when communicating as
The first directional antenna 201 is used for communication with the opposite station based on the data such as the position of the opposite station with which 1 is communicating and the data of the position of the terminal station 101 itself. Direction control of the first directional antenna 201 as described above, and before the communication between the first directional antenna 201 and the opposite station is blocked, the second directional antenna 202 and the opposite station. Directivity control is performed on the second directional antenna 202 so as to communicate with each other. At this time, the antenna control device 209 also controls switching of the communication system.

In the antenna control device 209 of the mobile radio communication device, the mobile radio communication device is the relay station 10.
When communicating as 2, the plurality of directional antennas 2
The first directional antenna 2 based on the data such as the positions of the plurality of opposite stations with which 01 and 202 are communicating and the data such as the position of the relay station 102 itself.
01 is used for communication with the first opposite station 101, and the second directional antenna 202 is used for communication with the second opposite station 103. Before the at least one of the communication between the plurality of directional antennas 201 and 202 and the plurality of opposite stations 101 and 103 is shielded, the plurality of directional antennas 2
01 and 202 direct control the directionality of the plurality of directional antennas 201 and 202 to the plurality of opposite stations with which communication is possible. At this time, the antenna control device 209 also controls switching of the communication system.

The data such as the position of the own device is at least one data of the position, azimuth, attitude and speed of the own device, and the data such as the position of the opposite station is the position of the opposite station. It is at least one data of data of azimuth, attitude, and speed.

The amplification of the plurality of mobile radio communication devices
The transmission / reception shared units 203 and 204 are installed near the plurality of directional antennas 201 and 202, respectively, and the transmission / reception units 207 and 208 are the amplification / transmission / reception shared unit 203,
The amplification / transmission / reception shared unit 20 is installed separately from 204.
3, 204 and the transmission / reception units 207, 208 are transmitted in an intermediate frequency band.

The communication system of the present invention comprises a plurality of the mobile devices each of which is equipped with the mobile radio communication device, and the first mobile device of the plurality of mobile devices is one of the plurality of mobile devices. Of the plurality of mobile devices, the second mobile device communicates with the second mobile device, and the second mobile device communicates with the third mobile device or the ground station 103 among the plurality of mobile devices. Relay to.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION The configuration and role of each device in an embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a case where a plurality of aircraft such as helicopters (hereinafter referred to as aircraft) are used, one of which is a terminal station for taking a picture and the other is a relay station, so that long-distance broadband communication can be achieved. An example in the case of performing

The aircraft 101, 102 which conducts a search and the like are not fixed in the role of the terminal station / relay station at the time of starting the flight for the search activity or the like. Each aircraft 101, 102
Is equipped with a long-distance broadband mobile radio communication device for both a terminal station and a relay station, which will be described later, and has a function as both a terminal station and a relay station.

In the case where the aircraft 101 operates as a terminal station for performing photographing or the like depending on the situation, and when the aircraft 101 cannot communicate directly with the ground station 103 due to an obstacle or long-distance communication, another aircraft 102 , Moves to a place where it can communicate with both the aircraft 101 and the ground station 103, which are terminal stations, and appropriately acts as a relay station to relay communication. Alternatively, there may be a case where a machine at a position where relay can be performed is selected from a plurality of aircraft and relay is performed. The roles of the aircraft 101 and 102 can be mutually changed, and when the aircraft 102 is a terminal station, the aircraft 101 can also be a relay station.

The position of the terminal station 101 is the ground station 103.
The relay station 102 may not be used when it is possible to directly communicate with the relay station 102.

The number of aircraft is not limited to two and may be more than one. Also, there may be a plurality of relay stations. The aircraft is not limited to manned aircraft and unmanned aerial vehicles, and the types of aircraft are not limited to fixed wings and swirl wings. In some cases, mobile devices including vehicles and ships are used instead of aircraft. In addition, the ground station means the destination that finally receives the communication, and it may be fixed,
Communication may be performed while moving with mobile devices including aircraft, vehicles, and ships (for example, in the case of a command unit such as a movable command vehicle, a command ship, and a command machine).

Further, the terminal station and the relay station can communicate while moving, and can also perform ground stop (landing), air stop, and turn communication as necessary.

The contents to be communicated are not limited to the data including the photographed video, but may be the information data including the voice and the program. In addition, high-speed data such as video may be bidirectionally communicated between the terminal station-relay station-ground station.

When communicating, each aircraft 101,
Since the 102 confirms the positions of the ground station 103 and the aircraft other than its own by a method described later, the role of each aircraft capable of an optimum relay method is determined by the antenna control device 209 or an aircraft management system separately prepared. Can be selected or changed automatically, or manually by inputting to the communication control device 212.

In the following, the aircraft 101 is referred to as a terminal station,
An example in which the aircraft 102 is used as a relay station will be described.

In this example, power efficiency is improved in long-distance, high-speed communication.
Since the frequency division receiving method, which is advantageous in terms of transmission distance, is used, radio waves of different frequencies are used for each communication. The frequencies f1, f2, f3, and f4 in FIG. 1 represent radio waves of different frequencies.

Data such as video is transmitted at the frequency f1 from the terminal station 101 to the relay station 102. Necessary data such as the position of the own device (= terminal station) 101 and the communication status are added to this data by multiplexing, and are simultaneously transmitted.

From the relay station 102 to the terminal station 101,
Data obtained by adding the data received from the ground station 103 to necessary data such as the position of the relay station) 102 and the communication status is transmitted at the frequency f2. When bidirectional communication such as video (from relay station 102 to terminal station 1
In the case of transmitting high-speed data such as video to 01), the data is multiplexed and transmitted simultaneously.

Terminal station 1 from relay station 102 to ground station 103
In addition to the data such as the video received from 01, the data including the position and communication status of the terminal station 101, necessary data including the position and communication status of the own device (= relay station) 102 are multiplexed, and the frequency f3 Sent by. Terminal 10
It is also possible to format the signal so that it is transmitted by adding the data of the relay station 102 to the data from 1.

If necessary, data including the position of the ground station 103, the communication status, etc. is transmitted from the ground station 103 to the relay station 102 at the frequency f4. In the case of bidirectional communication of images and the like (when transmitting high-speed image data from the ground station 103 to the relay station), the data are multiplexed and transmitted simultaneously.

Each frequency to be used is a frequency corresponding to the opposite station, and a transmission filter 303, a reception filter 304, a local oscillator 308 included in the amplification / transmission / reception common units 203 and 204 of the long-distance wide band mobile radio communication device described later. Within the range equipped with the antenna control device 209 or the communication control device 212 or the input device 22.
Determined by manually selecting to 0. The frequency of the radio wave used for communication can be decided in advance,
It can also be selected from the usable range. When not passing through the relay station, the terminal station 101 and the ground station 103 transmit and receive by radio waves of two types of frequencies that can be selected.

FIG. 2 shows the configuration of a long-distance wideband mobile radio communication device 200 for both terminal stations and relay stations. The long-distance broadband mobile radio communication device 200 includes a plurality of directional antennas 201,
202, each amplification installed near each directional antenna
Transmission / reception shared units 203 and 204, transmission / reception unit (modulation / demodulation unit) 20
7, 208, the intermediate frequency cable 2 that connects the amplification / transmission / reception common units 203 and 204 and the transmission / reception units 207 and 208.
13, switches 205 and 206 for intermediate frequency, encoders and decoders 210 and 211, communication control device 212,
Consists of an antenna control device 209, antenna drive units 214 and 215 that drive a directional antenna by a directivity control signal from the antenna control device 209, and a control program (for terminal station / relay station) 216 used by the antenna control device 209. Then, separately, necessary data is input from a device 217 such as a photographing device that outputs photographed data and the like, and a device 218 that detects data such as the position of the own device.

An external display 219 for displaying images and various data may be installed if necessary, and the input device 22 may be used to correct the data or input required data.
In some cases, 0 is set. External display 2
The input device 220 and the input device 220 can be integrated with the communication control device 212, or can be separately installed and connected.

A plurality of directional antennas 201 and 202 are appropriately arranged according to the characteristics and restrictions of the mounted body and the required stability of the transmitted image and the like.

In particular, the directional antennas 201, 2 for the aircraft
When the 02 is mounted and communicates, the directional antennas 201 and 202 correspond to the shape and posture of the aircraft and the opposite station, unless the aircraft is large and low-speed and the antenna can be largely projected to the outside by a pillar or the like. In order to avoid radio wave shielding (blanking) due to relative azimuth, etc., it is necessary to mount two or more of them and use them while changing the connection with the transceiver. In this case, the antenna directing (steering) control procedure, the switching timing control procedure for the antenna to be used, and the like are different between the terminal station and the relay station in order to avoid communication interruption as much as possible (for example, the terminal station has two antennas. One of the two antennas can be controlled to point toward the relay station or the ground station, while the relay station controls so that one of the two antennas is directed toward the terminal station and the other is directed toward the ground station while turning around the air and staying in the air. There is a need to.).

When functioning as a terminal station, for either the relay station or the ground station, one of the antennas that can be seen in terms of radio waves is selected according to the position / azimuth / posture of the own device and the position of the opposite station, and the opposite station is selected. It is driven to face (relay station or ground station when no relay station is used). The calculation of the direction to be pointed and the like is performed by an antenna control device 209 and a control program terminal station 216 which will be described later, and the antenna drive unit 214,
Driven at 215. In this case, the plurality of directional antennas 201 and 202 are all controlled so as to face the direction of one opposite station (relay station or ground station), and the directional antenna 201 (or 202) used for communication and the opposite station. If the space between and is shielded by the airframe, control is performed so that the propagation path is switched to another directional antenna 202 (or 201) that is not shielded before the shielding occurs. A device 21 for detecting data such as GPS, inertial sensor, altimeter, attitude control device, or the like of the position of the device itself required for antenna control.
8, the data such as the position of the opposite station is obtained by communication from the opposite station (when the ground station is a fixed station, the position data can be input).

When functioning as a relay station, the aircraft normally moves or turns in an air space where radio waves are communicated from both the relay target station (terminal station and ground station) (in order to improve fuel efficiency even in the case of rotor blades, etc.) It often turns at a constant speed.) Or stop and relay in both directions. Therefore, one of the directional antennas 201 and 202 is controlled to the terminal station and the other one is controlled to the ground station at the same time according to the turning or shaking of the own terminal and the movement of the opposite terminal station. , And simultaneously communicate with these two opposite stations. The calculation of the direction to be directed, etc. is performed by the antenna control device 209 and the control program (for relay station) 216, and the directional antennas 201, 2
The drive of 02 is performed by the antenna drive units 214 and 215. The data such as the position of the own machine required for antenna control is G
It is obtained from a device 218 such as PS, inertial sensor, altimeter, attitude control device, and the like that detects data such as the position of its own device, and data such as the position of the opposite station is obtained by communication (if the ground station is a fixed station, the position is determined). (You can also input data.) Before the communication with the opposite station of at least one of the antennas is shielded by the aircraft of your own machine, both directional antennas communicate with the opposite station with which communication is possible. Directional control is performed, and at the same time, both communication systems used for the terminal station and the ground station are switched and controlled.

In the case where only two directional antennas are used in the relay station as in the case of the present case, when the connection of each directional antenna to the opposite station is changed by turning the relay station, the directional antennas are rotated by about 180 °. Since it is necessary to rotate the communication and communication is interrupted during this period, it is possible to increase the number of antennas or the like and change the connection when high quality communication is required.

The common amplification / transmission / reception units 203 and 204 are installed near the directional antennas 201 and 202, respectively. The amplification / transmission / reception shared units 203 and 204 have the same internal structure and have the same functions. As shown in FIG. 3, the antenna transmission / reception shared unit 301 and the transmission power amplifier 30 are provided.
2, transmission filter 303, reception filter 304, transmission frequency converter 305, reception frequency converter 306,
It is composed of a low noise amplifier 307 and a local oscillator 308.

The antenna transmission / reception common unit 301 is used for reception / transmission when the directional antenna of the system is used.

The transmission power amplifier 302 amplifies the transmission output to a level required for communication.

The transmission filter 303 is provided with a plurality of filters corresponding to the respective transmission frequencies, and is switched and connected according to the frequency used by the corresponding antenna for transmission. The switching corresponds to the switching of the directional antennas 201 and 202, and the antenna control unit 209
Controlled by. The type of filter may be an individual band-pass filter (abbreviated as "BPF") or a low-pass filter ("LPF") depending on the overall transmission frequency arrangement, required performance, price tolerance, and the like. (Abbreviated) or a high-pass filter (abbreviated as “HPF”). It is also possible to use a digital filter that satisfies high-frequency response performance, noise performance, and the like.

The reception filter 304 is provided with a plurality of filters corresponding to the respective reception frequencies, and is switched and connected according to the frequency used by the corresponding antenna for reception. The switching corresponds to the switching of the directional antennas 201 and 202, and the antenna control unit 20
Controlled by 9. BP similar to the transmission filter 303
It may be an F, LPF, HPF, or digital filter.

In the case of a relay station, transmission / reception is performed simultaneously with both the terminal station and the ground station, and the frequency of the radio wave used by each antenna is switched by switching the antennas. Filter 3
03 and reception filters 304 are provided in the numbers required to correspond to the frequencies of the radio waves used for communication with the respective opposite stations. In addition, since it may be a terminal station, a terminal corresponding to the frequency of the radio wave corresponding to the use as a terminal station is equipped. Therefore, for example, in the case of FIG. 1, in order to have the functions of both the terminal station and the relay station, f
It is necessary to support frequencies of 1, f2, f3 and f1, f2, f4 for reception. In addition, since it is possible to flexibly cope with the situation, it is possible to equip the equipment by increasing the corresponding frequencies.

The transmission frequency converter 305 converts the signal received at the intermediate frequency into the radio frequency for transmission.

The reception frequency converter 306 converts the signal received at the received radio frequency into an intermediate frequency.

The low noise amplifier 307 amplifies the received signal of a weak radio frequency after passing through the reception filter 304. It is also possible to share the frequency band and to correspond to the entire reception frequency band.

The local oscillator 308 has a transmitting frequency converter 305 and a receiving frequency converter 30 according to the frequency used.
6 is switched and connected to generate a signal having a frequency corresponding to each transmission and reception. The switching connection is a directional antenna 201,
Corresponding to the switching of 202, it is controlled by the antenna control unit 209. The corresponding frequency of the local oscillator 308 is equipped with a number corresponding to the frequency used for transmission and reception.

The local oscillator 308 to be used may be a synthesizer, and since it is necessary to generate a low noise frequency for long-distance / high-speed communication, it may be composed of a crystal oscillator / multiplier circuit or the like. .

When functioning as the terminal station 101, since one directional antenna 201 (or 202) is used, the transmission / reception frequency to be used is one wave for transmission and one wave for reception corresponding to one opposite station. Use 2 waves. The frequency to be used may be predetermined or may be changed later within a possible range. The system in the amplification / transmission / reception shared unit used in one of the amplification / transmission / reception shared units 203 and 204 is f1 for the transmission system and f2 for the reception system in the case of frequency distribution as shown in FIG. 1, for example. It is controlled to connect to the transmission filter 303, the reception filter 304, and the local oscillator 308 corresponding to the frequency of.

In the case of the relay station 102, since the two directional antennas 201 and 202 are used for the terminal station and the ground station at the same time, the transmission / reception frequencies used are 2 waves at a time for a total of 4 waves.
Become a wave. Amplification / transmission / reception shared unit 2 when switching antennas
The frequency generation circuit systems in 03 and 204 are also controlled so as to change the connection for four waves at a time. In the case of the frequency distribution as shown in FIG. 1, the transmitting system is connected to the terminal station antenna side so as to correspond to f2, and the receiving system is connected so as to correspond to f1, and the receiving system antenna side is connected to the receiving system to f3. The systems are connected to correspond to f4. Then, the opposite station of each antenna is switched according to the turning of the machine body or the like. At that time, the transmission / reception frequencies of the transmission filter 303, the reception filter 304, and the local oscillator 308 of each of the amplification / transmission / reception shared units 203 and 204 all correspond to the frequency used for communication with the next opposite station. To switch to.

In addition, when the number of relay stations is increased, the frequency of the radio wave to be used is increased. Therefore, according to the corresponding frequency, the number of relay stations to be increased, the situation of switching occurrence, and the role that may be in charge are taken into consideration. It is necessary to include a transmission filter 303, a reception filter 304, and a local oscillator 308.

Transmitting / receiving units (modulation / demodulation units) 207, 208 modulate the data bit streams from the encoders 210, 211 to a required modulation type, an intermediate frequency of a frequency band, amplify the data bit streams, and direct them to the common amplification / transmission / reception units 203, 204. Of the signals transmitted from the common amplification / transmission / reception units 203 and 204 at the intermediate frequency and then the decoders 210 and 2
Send to 11.

In the case where one side is high-speed data and one side is low-speed data such as position and communication status without bidirectional communication of high-speed data such as video, the opposite station is a terminal station, and the case is a relay station or a ground station. Whether the signal content to be transmitted by high speed data or low speed data differs depending on the
The frequencies are very different. Therefore, the function of the transmission / reception unit is divided into a transmission / reception unit (for the terminal station) 207 and a transmission / reception unit (for the ground station or for the relay station) 208. The transmission / reception unit (for the terminal station) 207 and the transmission / reception unit (for the relay station) 208 may be housed in the same container or may be housed separately. If the terminal device is the terminal station 101, the transmission / reception unit (for the opposite terminal station) 207 is not used.

When operating as a terminal station, the encoder / decoder 211 performs serial / parallel conversion, speed conversion, multiplexing, etc. on a data signal such as a video from a device 217 such as a photographing device that outputs photographed data, While transmitting to the transmission / reception unit 208, the bit stream from the transmission / reception unit 208 is synchronized, signal separated, content decoded, and the like, and a display device (= display) 219 of the machine body, an antenna control device 209,
It is sent to a data bus (not shown).

Note that FIG. 2 shows an example in which data such as images from a device 217 such as a photographing device that outputs photographed data is input via the communication control device 212. There is no particular limitation.

When operating as a relay station,
The decoder 210 performs synchronization, signal separation, content decoding, etc., on the data signal received from the terminal station from the transmission / reception unit 207, and sends it to one encoder / decoder 211. The encoder / decoder 211 adds its own data and the like to the received data signal, performs serial / parallel conversion, speed conversion, multiplexing, etc., and sends it to the transmission / reception unit 208. The encoder / decoder 211 synchronizes, separates, and decodes the data signal from the transmission / reception unit 208 received from the ground station or the relay station, and sends the data signal to one encoder / decoder 210. The encoder / decoder 210 adds its own data and the like to the received data signal, performs serial / parallel conversion, speed conversion, multiplexing, etc., and sends it to the transmitting / receiving unit 207. In addition, the encoder / decoders 210 and 211 decode the data and display the data (= display) of the aircraft.
219, the antenna control device 209, and a data bus (not shown).

When two-way communication of high-speed data such as video is not performed and one is high-speed data, one is low-speed data such as position and communication status, the opposite station is a terminal station, and the case is a repeater or a ground station. The signal content to be transmitted differs depending on whether it is high-speed data or low-speed data.
It is divided into a decoder (for terminal station) 210 and an encoder / decoder (for ground station or for relay station) 211.
The encoder / decoder (for the terminal station) 210 and the encoder / decoder (for the ground station or for the relay station) 211 may be housed in the same container, or may be housed separately. In the case of the terminal, the encoder / decoder (for the opposite terminal) 210 is not used.

Device 21 for detecting data such as position of own device
8 is GPS, inertial sensor, altimeter, speedometer, azimuth meter,
The device includes at least one of an attitude control device and the like, and is a device that detects at least one of the position, azimuth, attitude, and speed of the own device. Device 218 for detecting data such as the position of the player
Is sent to the encoders / decoders 210 and 211 as the data of the position of the device itself and to the antenna control unit 209.

Intermediate frequency system changeover switches 205, 20
Reference numeral 6 is installed between the amplification / transmission / reception common units 203 and 204 and the amplification / transmission / reception common units 203 and 204, and performs connection and switching of transmission / reception of each. The intermediate frequency system changeover switches 205 and 206 are arranged to connect the amplification / transmission / reception shared units 203 and 204 communicating with the opposite stations and the transmission / reception units 207 and 208 corresponding to the opposite stations. Further, the intermediate frequency system changeover switches 205 and 206 correspond to the switching of the directional antennas 201 and 201, and are controlled by the antenna control device 209.

Between the amplification / transmission / reception common units 203 and 204 and the transmission / reception units 207 and 208, there are intermediate frequency system switches 205 and 206 and an intermediate frequency cable 213, as shown in FIG. The transmission / reception units 207, 208 and the amplification / transmission / reception common units 203, 204 are connected by the change-over switches 205, 206 so that the two transmission / reception systems can be switched respectively. Between the transmission / reception units 207, 208 and the amplification / transmission / reception shared units 203, 204, an intermediate frequency signal converted to an appropriate intermediate frequency by each amplification / transmission / reception shared unit 203, 204 or transmission / reception units 207, 208 is transmitted.

Since the respective data signals are sufficiently amplified by the respective amplification / transmission / reception sections 203, 204 and the respective transmission / reception sections 207, 208 according to the transmission distance, and the data signals are transmitted in the intermediate frequency band, the signals have high frequencies. The cable loss of the signal is sufficiently small compared to the signal attenuation due to the cable when the band (radio frequency) is transmitted as it is. Therefore, even when a plurality of antennas are separated from each other on the left and right sides of the airframe, the final signal quality (signal-to-noise, etc.) is hardly affected. Therefore, the directional antennas 201 and 202 and the transmission / reception unit 20
7, 208 can be installed separately, and can be freely arranged.

The communication control device 212 is installed in a place suitable for operation such as an aircraft cockpit, and is provided with an operation plate for turning on / off the power of the entire communication system, displaying the status of each device, switching the mode of a terminal station / relay station, and the like. can do. In some cases, necessary information may be manually input and controlled by using switches and keys. Further, it receives an input from a device 217 such as a photographing device that outputs photographed data or the like, or receives an input from the input device 220 when correcting data or inputting required data. An external display 219 for displaying an image is connected as necessary, and required data, image data, etc. are output. The input device 220 and the external display 219 may be included in the communication control device 212 or may be separately connectable. It may also relay the input / output of other necessary data.

The antenna control device 209 determines the position of its own device,
Data such as azimuth and attitude (GPS, inertial sensor, altimeter,
It is input from a device 218 that detects data such as the position of the own device including an attitude control device and the like. ) And data such as the position of the opposite station (each station transmits and receives each other. However, the position data of the ground station may be transmitted by radio waves, or may be manually input in advance by the input device 220 for simplicity. .) From the directional antennas 201 and 202,
It outputs pointing control and switching control signals for driving the antenna driving units 214 and 215. In addition, corresponding to antenna switching, the transmission filter 303, the reception filter 304, the local oscillator 308, and the intermediate frequency system changeover switches 205 and 20.
6, transmission / reception units 207 and 208, encoder / decoder 2
It is also possible to output a control signal for switching each system / function including a part or all of 10, 211 and a power source (not shown). Further, the antenna control device 209 can also collect and send information such as communication status of each device of the own device for transmitting to another station.

These control signals differ in the switching timing, the pointing direction of the antenna to be controlled, the number of objects to be controlled, etc. between the terminal station and the relay station. Therefore, the control program 216 corresponding to each is stored in the memory or the like. Hold it so that it can be switched according to the role.

The switching of the control program 216 can be automatically switched at the same time as the mode switching according to the role switching of the machine, or can be selected manually.

The control program 216 is for the terminal station,
The relay station may be used as a separate program, or two functions may be included in one program.

The control program 216 may be stored in the memory of the on-board device as described above, or may be downloaded from the ground or the like via a wireless line as needed. In addition, the control program 21
The memory for storing 6 and the reading device (not shown) are
It may be integrated with the communication control device or the antenna control device, or may be installed separately.

The antenna control unit 209 has the transmitting / receiving unit 20.
7, 208 and encoders / decoders 210, 211 may be integrated, or the cockpit of a small aircraft or the like is usually small, so that both functions may be separated.

Next, as in the example of FIG. 1, an operation example in the case where the aircraft 101 acts as a terminal station to perform photographing and the aircraft 102 acts as a relay station to relay communication with the ground station 103 will be described.

The terminal station 101 captures data such as images and images and data of its own (= terminal station) 101 (including data such as position and communication status; the same applies hereinafter) at the relay station 102 at the frequency f1. Have been sent to. In addition, the terminal station 101 receives from the relay station 102 at the frequency f2 and is its own (= relay station) 102.
Data (data of the ground station 103 as necessary) is received.

At this time, in the terminal station 101, a data signal such as an image is input to the communication control device 212 from a device 217 such as a photographing device that outputs photographed data, and an encoder (for the ground station or for the relay station) is input. ) 211.
A data signal such as an image is converted by an encoder (for ground station or for relay station) 211 and sent to a transmitting / receiving unit (for ground station or for relay station) 208. At this time, the data signal from the device 218 that detects the data such as the position of the own device is also converted and multiplexed by the encoder (for the ground station or for the relay station) 211, and is combined with the data such as the video and the transmission / reception unit ( (To the ground station or to the relay station) 208. The data signal from the device 218 that detects data such as the position of the own device is also sent to the antenna control device 209 at the same time.
When confirming various data on the display 219, various data signals can be sent to the display 219 via the communication control device.

Transmitter / receiver (for ground station or for relay station)
The data signal sent to 208 is modulated and amplified to an intermediate frequency in a required modulation type and frequency band. The data signal transmitted from the transmission / reception unit (for the ground station or for the relay station) 208 is amplified by the intermediate frequency system changeover switch 206, and the amplification / transmission common unit of the directional antenna (here, 202) is used. It is connected to 204. Transmission / reception unit (for ground station or for relay station) 208 and amplification / transmission sharing unit 204
During the period, the signal is transmitted at the intermediate frequency, so that the attenuation can be suppressed and the cable can be lengthened.

The data signal sent to the common amplification / transmission unit 204 is converted from the intermediate frequency to the radio frequency f1 for transmission by the transmission frequency converter 305 in the common amplification / transmission unit 204. The transmission frequency converter 305 is connected to the local oscillator 308 corresponding to f1. The converted data signal passes through the transmission filter 303 corresponding to f1, is amplified by the transmission power amplifier 302, and is transmitted to the relay station 102 from the directional antenna 202 as a high frequency / broadband radio wave via the transmission / reception common unit 301. To be done.

At the same time, the directional antenna 202 of the terminal station
The radio wave transmitted from the relay station 102 at the frequency f2 is received. The data included in this radio wave is data including the position of the relay station 102, the communication status, and the like (including the data of the ground station 103 as necessary), and is used for antenna control and the like. When data such as video is transmitted from the ground station or relay station, these data can be included. The data signal from the received radio wave passes through the transmission / reception sharing unit 301 in the amplification / transmission sharing unit 204, passes through the reception filter 304 corresponding to f2, and is amplified by the low noise amplifier 307. The amplified signal is converted into an intermediate frequency by the reception frequency converter 306 and is sent out. In addition, the frequency converter for reception 3
06 is connected to the local oscillator corresponding to f2.

The data signal sent from the amplification / transmission / reception shared section 204 is connected to the transmission / reception section (for the ground station or for the relay station) 208 by the intermediate frequency system changeover switch 205. Since the intermediate frequency is transmitted between the amplification / transmission common unit 204 and the transmission / reception unit (for ground station or for relay station) 208, attenuation can be suppressed and the cable can be lengthened. Transceiver (for ground station or for relay station) 2
The data signal modulated and amplified to the required frequency by 08 is
It is sent to the decoder (for the ground station or for the relay station) 211. Decoder (for ground station or for relay station) 211
Then, the decoded data signal is sent to the antenna controller. When data such as video is included, it is sent toward the external display 219 or the like.

In the terminal station, the antenna control device 209 calculates the orientation of the directional antenna 202 using the data such as the position from the relay station and the data from the device 218 that detects the data such as the position of the own device. Antenna drive unit 215
The pointing control signal is output to. Further, the directional antenna 202 being used is (=) the relay station 102 and the own device (= terminal station) 101 depending on the flight conditions such as turning and turning conditions.
The timing at which radio waves are shielded by the body of the terminal station 101 is calculated, and a switching control signal for switching to another usable directional antenna 201 is output before the radio waves are shielded. The communication system is switched by the intermediate frequency system changeover switches 205, 2 by a switching control signal of the antenna control device 209.
06. The directional antenna 201 that has not been used can be smoothly switched by controlling it so that it can communicate with the relay station before switching.
In addition, the directional antenna 2 used next before switching the antenna
01, the transmission filter 303, the reception filter 304, and the local oscillator 30 in the amplification / transmission / reception shared unit 203
It is also possible to switch 8 to the corresponding frequency.

When used as a terminal station, a transmitting / receiving section (for the terminal station) 207, an encoder / decoder (for the terminal station) 2
10 is not used. Also, when functioning as a terminal station,
A control program (for terminal station) 316 is used.

Next, the operation when the mobile radio communication device of the present invention is used as a relay station will be described. The relay station 102 transmits the video data and the data of the terminal station from the terminal station 101 to the frequency f1.
Then, the data of the relay station 102 (data of the ground station 103 as necessary) is transmitted to the terminal station 103 at f2.
In addition to the data (video data and data of the terminal station) received from the terminal station 101, the relay station 102 transmits the data of its own apparatus (= relay station) 102 at f3, and the ground station 103 transmits the data. , The data of the ground station 103 is received at f4.

In this example, the directional antenna 201 in the relay station faces the terminal station 101, and the directional antenna 202
However, the case where it is used toward the ground station 103 will be described.

The radio wave received at the frequency f1 from the terminal station 101 at the directional antenna 201 of the relay station is used as a data signal in the transmission / reception common unit 301 in the amplification / transmission / reception common unit 203,
Reception filter 304 corresponding to f1, low noise amplifier 3
07, and is transmitted via the reception frequency converter 306. The reception frequency converter 306 is the local oscillator 3 corresponding to f1.
08 is connected. The transmitted data signal is transmitted / received by the intermediate frequency system switch 205 to the transmitting / receiving unit (for the terminal station) 20.
Connected to 7. Between the amplification / transmission / reception common unit 203 and the transmission / reception unit (for the terminal station) 207, since transmission is performed at an intermediate frequency, attenuation is suppressed even if the distance becomes long. The data signal demodulated by the transmission / reception unit (for the terminal station) 207 passes through the encoder / decoder (for the terminal station) 210 and the encoder / decoder.
It is sent to the decoder (for ground station) 211. At this time,
Necessary data such as the position of the terminal station 101 and the communication status are sent to the antenna control unit 209. The encoder / decoder (for the ground station or for the relay station) 211 detects the data such as the position of the own device from the device 218 (=
The data of the relay station) 102 is added to the data from the terminal station 101 including the data such as video, and is sent to the transmitting / receiving unit (for the ground station or for the relay station) 208. The data signal is modulated into an intermediate frequency by the transmission / reception unit (for ground station or for relay station) 208 and transmitted. The transmitting / receiving unit (for the ground station or for the relay station) 208 is connected to the amplification / transmission / reception sharing unit 204 of the directional antenna 201 corresponding to the ground station 103 by the intermediate frequency system changeover switch 206. Since a signal is transmitted at an intermediate frequency between the transmission / reception unit (for ground station or for relay station) 208 and the amplification / transmission / reception sharing unit 204, signal attenuation can be suppressed even if the distance becomes long. In the amplification / transmission / reception sharing unit 204, the frequency f3 is directed from the directional antenna 202 to the ground station 103 via the transmission frequency converter 305, the transmission filter 303 corresponding to the f3, the transmission power amplifier 302, and the transmission / reception sharing unit 301. Sent. Further, the transmission frequency converter 305 is connected to the local oscillator 308 corresponding to f3.

Further, the relay station 102 uses the directional antenna 202 from the ground station 103 to receive the radio wave of the frequency f4. The data signal converted from the received electric wave is transmitted / received in the amplification / transmission / reception shared unit 204,
Reception filter 304 corresponding to f4, low noise amplifier 3
07, and is transmitted via the reception frequency converter 306. Further, the frequency converter for reception 306 is connected to the local oscillator 308 corresponding to f4. The data signal sent from the amplification / transmission / reception common unit 204 passes through the intermediate frequency system changeover switch 205 and the transmission / reception unit (for the ground station or for the relay station).
It is transmitted to 208. Since a signal is transmitted at an intermediate frequency between the amplification / transmission / reception shared unit 204 and the transmission / reception unit (for ground station or for relay station) 208, attenuation can be suppressed even if the distance becomes long. The data signal demodulated by the transmission / reception unit (for ground station or for relay station) 208 is sent to the encoder / decoder (for ground station or for relay station) 211. A data signal such as the position of the ground station is sent from the encoder / decoder (for the ground station or for the relay station) 211 to the antenna controller. Further, of the data sent to the encoder / decoder (for the ground station or for the relay station) 211, the data that needs to be transmitted to the terminal station 101 is from the device 218 that detects the data such as the position of the own device. Encoder / decoder (for terminal station) together with the data of
The data is sent to the transmitting / receiving unit (for the terminal station) 207 via 210. The data signal from the transmitting / receiving unit (for the terminal station) 207 is
The intermediate frequency system selector switch 206 is connected to the amplification / transmission / reception common unit 203 corresponding to the directional antenna used for the opposite terminal. Since radio waves are transmitted at an intermediate frequency between the transmission / reception unit (for terminal station) 207 and the amplification / transmission / reception sharing unit 203, attenuation can be suppressed even if the distance becomes long. In the amplification / transmission / reception common unit 203, transmission is performed at the frequency f2 from the directional antenna 202 to the terminal station 101 via the transmission frequency converter 305, the transmission filter 303 corresponding to f2, the transmission power amplifier 302, and the transmission / reception common unit 301. To be done. Further, the transmission frequency converter 305 is connected to the local oscillator 308 corresponding to f2.

If the terminal station 101 and the relay station 102 respectively want to check the data of their own or other devices, the received video data, etc., the encoder / decoder 210, 2
It is also possible to send data from 11 to the communication control device 212 so that the data can be confirmed on the display 219 or the like.

Data such as video data from the ground station 103 or video data from the relay station 102 is sent to the terminal station 101.
You can also send it to.

In the relay station 102, the antenna control device 2
Reference numeral 09 denotes the position of the terminal station 101, the position of the own device (= relay station) 102, the position of the ground station 103, and the movement and movement of the terminal station 101, the own device (= relay station) 102, the ground station 103, and the like. Depending on the situation, the control program (for relay station) 216 controls the orientations of the directional antennas 201 and 202.

Further, the antenna control unit 209 uses the terminal station 10
1 or the ground station 103 communicates with itself (=
The opposite station of the directional antennas 201 and 202 is switched at the same time before the radio wave is blocked by the body of the own device (= relay station) 102 or the like due to a movement such as turning of the relay station) 102 or a movement of the terminal station 101. The switching timing is the antenna control device 20.
9 and the communication signal is changed to the intermediate frequency system changeover switch 20 by the control signal from the antenna control device 209.
5, 206, and at the same time, the amplification / transmission / reception common unit 20 corresponding to the directional antennas 201 and 202, respectively.
The frequencies of the transmitting filter 303, the receiving filter 304, and the local oscillator 308 in 3, 204 are switched so as to correspond to the frequency of the radio wave used for communication with a newly opposing station. Simultaneous with switching, directional antennas 201, 2
Reference numeral 02 is a control signal from the antenna control device 209, and is driven by the antenna driving units 214 and 215 so as to face a new opposite station. Also, the encoder / decoder 210, 2
11. When switching and adjustment occur in each system such as 11, transmission / reception units 203 and 204, and power supply, they are simultaneously controlled.

Since the control of the antenna and the like in the relay station 102 is different from the control of the antenna and the like in the terminal station 101, the relay station 1
In 02, a control program (for relay station) 216 different from that for the terminal station is used. Control program (for middle terminal
Switching of the relay station 316 can be performed by manually switching the mode of the communication control device 212 or automatically by the antenna control device. Further, it is also possible to include two modes in the same program and to switch them automatically or manually.

The directional antenna 20 as in this example
In the relay station 102 having only two 1 and 202, when switching the directional antennas 201 and 202, it is necessary to rotate the antennas by approximately 180 ° depending on the position of the opposite station, so the communication is interrupted during this period. When high quality communication is required, the number of antennas can be increased so that communication disconnection can be prevented. In this case, multiple (3 or more)
In the directional antenna, the directional antennas that are in communication are controlled in direction so that communication can be maintained, and the directional antennas that are not in communication are controlled in direction toward the opposite station to communicate next. In this case, it is not necessary to switch two or more directional antennas that are communicating at the same time.

Further, the above-mentioned wireless communication device can be applied to a skeleton part of a network-like communication form between n: n mobiles which requires mutual transmission of data including high speed data.

[0112]

[Effects of the Invention] In order to flexibly respond to a fluid situation where there is no prior information at the time of a disaster or the like, and to enable swift wide-area investigation / monitoring activities, a plurality of aircraft should be provided with both terminal and relay station functions. , A system that enables communication while flexibly changing its function according to the situation becomes possible.

By equipping a plurality of aircrafts with a common device having functions of both a terminal station and a relay station and switching control programs, the functions can be changed flexibly according to the situation, and long distance and wide range can be extended. Distance communication is possible.

The plurality of directional antennas and the transmission / reception common unit have a function capable of supporting both the terminal station and the ground station, respectively, and the relay station relaying the terminal station and the ground station may move or turn. The relay can be performed while switching a plurality of directional antennas so as not to be shielded by the own device.

In communication using high frequency, when wideband and high-speed data such as video is transmitted by a directional antenna over a long distance, an amplification / reception common unit is arranged near the directional antenna and transmitted by a cable. By using an intermediate frequency for the cable, the attenuation in the cable can be reduced to a negligible range, which enables long-distance communication using high frequency.

When performing long-distance communication of wide-band, high-speed data such as images using a directional antenna that uses high frequencies, an amplification / reception common unit is placed near the directional antenna and used as an intermediate for signal transmission via a cable. By using the frequency, the attenuation in the cable can be reduced to a negligible range, so that the directional antenna and the transmitter / receiver can be arranged separately.

The relay station uses the directional antennas for the opposite terminal station and the ground station, so that a wide band of two-way images,
High-speed data communication becomes possible.

The on-board device is currently constructed as a dedicated device like the terminal station device and frequency and the relay station device and frequency, but by the method of the present invention,
By simple operation (switch operation for mode setting, etc.),
It is possible to operate as a terminal station and at any time as a relay station. As a result, it is possible to flexibly respond to unknown and fluid situations such as disasters, and to realize a system that enables swift wide-area search and surveillance activities (that is, an empty system such as the current partial relay system). A machine that communicates with the ground (that is, a relay station) and a machine that cannot communicate with the ground without a relay station in the middle (that is, a terminal station) are not fixed, increasing the operational flexibility of the aircraft.)

Furthermore, if a large number of frequencies are possessed and a filter, LO, etc. system corresponding to them is prepared, the number of relay sections can be increased, and the flexibility and expandability of system construction is great, and operational flexibility is further increased. Can be improved.

Since the equipment has the same function,
It is possible to flexibly cope with mutual equipment malfunctions.

By adopting the method of installing the amplification / transmission / reception shared part in the vicinity of the antenna, the degree of freedom in installing the antenna is increased regardless of the size (distance between antenna and transmitter / receiver) and shape of the machine body. It is possible to build a long-distance high-speed two-way relay communication system on the platform of.

The hardware of the terminal and relay station devices is mainly shared as much as possible, and a dedicated device is manufactured for the terminal and relay stations by the method of switching programs (software) for antenna orientation control and circuit switching control. Compared with the case of doing so, it is easy to obtain the mass production effect in terms of reducing the system construction cost.

Further, with respect to the high frequency circuit, the downsizing and cost reduction can be significantly achieved by the software and high integration of the processing due to the progress of the digital processing technology such as the filter and the high quality of the synthesizer.

By using a high-precision BPF as the high-frequency filter, it is possible to prevent interference between the camera, the repeater, and the ground station.
Interference can be reduced easily, and the frequency for uplink and downlink can be avoided depending on the situation such as interference, and the frequency can be changed at any time. You can operate.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a communication form using a relay station.

FIG. 2 is a diagram showing a configuration of a mobile radio communication device for both a terminal station and a relay station.

FIG. 3 is a diagram showing a configuration of an amplification / transmission / reception shared unit of a mobile radio communication device for both a terminal station and a relay station.

FIG. 4 is a diagram showing a configuration of a mobile radio communication device for a terminal station.

FIG. 5 is a diagram showing a configuration of a mobile radio communication device for a relay station.

FIG. 6 is a diagram showing a configuration of an amplification / transmission / reception shared unit of a mobile radio communication device for a terminal station.

FIG. 7 is a diagram showing a configuration of an end station amplification / transmission / reception shared unit of a relay station mobile radio communication device.

FIG. 8: Amplification of a mobile radio communication device for a relay station for a ground station
It is a figure which shows the structure of a transmission / reception common part.

[Explanation of symbols]

101 Terminal Station 102 Relay Station 103 Ground Station 200 Long-distance Broadband Mobile Radio Communication Equipment 201, 202 Directional Antennas 203, 204 Amplifying / Transmitting / Receiving Units 205, 206 Intermediate Frequency Switches (205 ′, 206 ′ Switches (for High Frequency Signals) 207) Transmitter / receiver (for terminal station) 208 Transmitter / receiver (for ground station or relay station) 209 Antenna control device 210 Encoder / decoder (for terminal station) 211 Encoder / decoder (for ground station) For communication or for relay station) 212 Communication control device 213 Intermediate frequency cables 214, 215 Antenna drive unit 216 Control program (for terminal station / relay station) 217 Device such as photographing equipment for inputting photographed data 218 Self Device for detecting data such as machine position 219 External display (219) 220 Input device 221 Transceiver (for terminal to opposite station) 222 Omnidirectional antenna 223 Transceiver (for relay station to ground station) 224 Amplification / transmission / reception shared section (relay station to ground station) 225 Amplification / transmission / reception shared section (For the opposite station of the relay station) 301 Antenna transmission / reception shared unit 302 Transmission power amplifier 303 Transmission filter 304 Reception filter 305 Transmission frequency converter 306 Reception frequency converter 307 Low noise amplifier 308 Local oscillators f1, f2, f3, f4 frequency

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5K011 DA02 DA06 DA12 DA27 JA01                 5K067 AA22 BB41 EE02 EE06 KK02                       KK03                 5K072 AA29 BB13 BB27 CC34 DD13                       DD15 GG02 GG04 GG05 GG11                       GG22 GG24 GG26

Claims (9)

[Claims] 1. A mobile radio communication device having functions for both a terminal station and a relay station, which is mounted on a mobile device including an aircraft, comprising a plurality of terminal stations, the relay station, and a ground station. A mobile radio communication device comprising a plurality of switchable directional antennas used for communication with an opposite station. 2. A mobile radio communication device having both a terminal station function and a relay station function, which is mounted on a mobile device including an aircraft, and comprises a plurality of terminal station devices, a relay station device, and a ground station device. A plurality of switchable directional antennas used for communication with the opposite station, a communication system used for transmission and reception of the plurality of directional antennas, controlling the direction of the plurality of directional antennas, and the communication system And an antenna control device for controlling switching of the plurality of directional antennas, wherein the first directional antenna of the plurality of directional antennas is used for communication with a first of the plurality of opposite stations. In this case, the second directional antenna of the plurality of directional antennas is configured to be usable for communication with the second opposite station of the plurality of opposite stations, and the first directional antenna is , The second opposite station When used for communication, operably configured the second directional antenna for communication with the first opposing station, the mobile radio communication device. 3. The mobile radio communication device according to claim 2, wherein the communication system includes a plurality of amplification / transmission / reception shared units installed corresponding to the plurality of directional antennas, respectively, and the plurality of opposite stations. And a switch, wherein the first directional antenna is in communication with the first opposite station and the second directional antenna is a switch. When communicating with the second opposite station, the amplification / transmission / reception shared section corresponding to the first directional antenna is connected to the transmission / reception section corresponding to the first opposite station, and the second opposite station is connected. The amplification / transmission / reception shared unit corresponding to the directional antenna is switched to be connected to the transmission / reception unit corresponding to the second opposite station, and the first directional antenna communicates with the second opposite station. The second directional antenna When communicating with the first opposite station, the amplification / transmission / reception shared section corresponding to the first directional antenna is connected to the transmission / reception section corresponding to the second opposite station, The mobile radio communication device is switched so that the amplification / transmission / reception shared unit corresponding to the directional antenna of is connected to the transmission / reception unit corresponding to the first opposite station. 4. The mobile radio communication device according to claim 3, wherein each of the plurality of amplification / transmission / reception shared units is provided corresponding to a plurality of radio wave frequencies used for reception with the plurality of opposite stations. A plurality of switchable reception filters, a plurality of switchable transmission filters provided corresponding to a plurality of radio frequencies used for transmission with the plurality of opposite stations, and transmission / reception with the plurality of opposite stations And a plurality of switchable local oscillators provided corresponding to a plurality of radio frequencies used in. 5. The mobile radio communication device according to claim 2, wherein the antenna control device is a terminal station control used when the mobile radio communication device communicates with one of the opposite stations as the terminal station. A mobile radio communication device for switching between a program and a relay station control program used when the mobile radio communication device relays communication with the plurality of opposite stations as the relay station. 6. The mobile radio communication device according to claim 2, wherein the antenna control device communicates with the first directional antenna when the mobile radio communication device communicates as the terminal station. The first directional antenna is used so as to be used for communication with the opposite station based on the data such as the position of the opposite station and the data of the position of the terminal station itself. Directivity control of the first directional antenna, and the second directional antenna and the opposite station communicate with each other before communication between the first directional antenna and the opposite station is blocked. Directionally controlling a directional antenna, and when the mobile wireless communication device communicates as the relay station, the plurality of directional antennas and the data such as the positions of the plurality of opposite stations with which each of the directional antennas is communicating, and the relay station. The position of a ship Based on the above data, the first directional antenna controls directivity so that it is used for communication with the first opposite station, and the second directional antenna is used for communication with the second opposite station. Direction control is performed so that the plurality of directional antennas can communicate with each other before at least one of communication between the plurality of directional antennas and the plurality of opposite stations is shielded. A mobile radio communication device, which direct-controls the plurality of directional antennas to an opposite station. 7. The mobile radio communication device according to claim 6, wherein the data such as the position of the own device is the position, azimuth, and the like of the own device.
The mobile radio communication device is at least one data of attitude and velocity data, and the data such as the position of the opposite station is at least one data of position, azimuth, posture and speed of the opposite station. 8. The mobile radio communication device according to claim 3, wherein the plurality of amplification / transmission / reception shared units are respectively installed near the plurality of directional antennas, and the transmission / reception unit is shared between the amplification / transmission / reception units. A mobile radio communication device, which is installed separately from the unit, and transmits between the amplification / transmission / reception shared unit and the transmission / reception unit in an intermediate frequency band. 9. A plurality of the mobile devices, each of which is equipped with the mobile radio communication device according to claim 1, wherein the first mobile device of the plurality of mobile devices is the mobile device. The second mobile device communicates with the second mobile device of the plurality of mobile devices, and the second mobile device communicates with the second mobile device of the third mobile device of the plurality of mobile devices. Or, a communication system that relays to the ground station.