JP2004032550A - Mobile radio station and its antenna azimuth control method - Google Patents

Mobile radio station and its antenna azimuth control method Download PDF

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Publication number
JP2004032550A
JP2004032550A JP2002188595A JP2002188595A JP2004032550A JP 2004032550 A JP2004032550 A JP 2004032550A JP 2002188595 A JP2002188595 A JP 2002188595A JP 2002188595 A JP2002188595 A JP 2002188595A JP 2004032550 A JP2004032550 A JP 2004032550A
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JP
Japan
Prior art keywords
antenna
azimuth
radio station
mobile radio
station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002188595A
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Japanese (ja)
Inventor
Ichiro Tsujimoto
辻本 一郎
Original Assignee
Nec Corp
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nec Corp, 日本電気株式会社 filed Critical Nec Corp
Priority to JP2002188595A priority Critical patent/JP2004032550A/en
Publication of JP2004032550A publication Critical patent/JP2004032550A/en
Application status is Pending legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile radio station which can automatically avoid an antenna azimuth applying radio wave interference to adjacent fixed radio stations. <P>SOLUTION: The mobile radio station 10 holds a position of a fixed radio station 20 in all expected moving areas of the mobile radio station 10 and information about an azimuth setting prohibition area where the fixed station 20 undergoes the radiowave interference for each position in the form of a database, and transmits a control signal to an antenna horizontal drive motor 13 from a CPU 17 to automatically avoid the azimuth setting prohibition area of an antenna 11 on the basis of position information 41 and antenna installation azimuth information 42 from a GPS sensor 14 and a terrestrial magnetism sensor 15 provided in the mobile station 10. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile radio station capable of controlling an antenna direction, and more particularly to a mobile radio station capable of automatically avoiding an antenna direction that causes radio interference to a nearby fixed radio station.
[0002]
[Prior art]
Conventionally, this type of mobile radio station uses a method of automatically controlling the antenna orientation in order to increase the reception electric field. However, as a result of deciding the antenna direction so that the received electric field becomes higher, when a fixed wireless station is located close to the direction, there is a problem that radio interference occurs to the fixed wireless station.
[0003]
Conventionally, as a countermeasure, the position information of the fixed radio station is checked in advance, and if there is a fixed radio station in the vicinity, the azimuth adjustment is manually performed so that the antenna of the mobile radio station does not point to the direction that causes radio wave interference. I was going. Further, in the case of a vehicle having an antenna fixed, an initial azimuth is determined at a position where the antenna is stopped, so that a radio wave may be inadvertently emitted.
[0004]
[Problems to be solved by the invention]
The above-mentioned conventional mobile radio station has a drawback that the mobile radio station interferes with a nearby fixed radio station by determining the antenna direction so that the reception electric field is increased.
[0005]
An object of the present invention is to eliminate such a drawback in the prior art by storing in advance a azimuth setting prohibited area in which a mobile radio station gives radio interference to a nearby fixed radio station as a database, and prior to radio wave emission, It is an object of the present invention to provide a mobile radio station that automatically controls the azimuth of the antenna so as to avoid the azimuth setting prohibited area by detecting the position and the azimuth of the antenna.
[0006]
[Means for Solving the Problems]
A mobile radio station according to the present invention is a mobile radio station having an antenna whose direction can be controlled, and includes a position detection unit that detects a current position, an azimuth detection unit that detects an antenna installation azimuth, and a position close to the current position. Storage means for storing in advance an azimuth setting prohibited area in which a fixed wireless station receives radio wave interference; and, based on the information of the current position, the antenna installation azimuth and the azimuth setting prohibited area, the antenna azimuth is set in the azimuth setting prohibited area. Antenna direction control means for controlling the antenna direction so as not to face the antenna.
[0007]
Further, the position detecting means is a GPS (Global Positioning System) sensor, and the azimuth detecting means is a geomagnetic sensor, both of which are attached to a pole supporting an antenna.
[0008]
Further, the storage means stores at least information on the positions of all fixed wireless stations and the azimuth setting prohibited area corresponding to each position within a range in which the mobile wireless station moves.
[0009]
In addition, the antenna direction control means may be configured such that, before the mobile radio station radiates radio waves, the direction of the rotatably mounted antenna is determined based on information on the current position, the antenna installation direction, and the direction setting prohibited area. Is controlled.
[0010]
Further, the antenna orientation control method for a mobile radio station is an antenna orientation control method for a mobile radio station having an antenna whose orientation can be controlled, wherein the positions of all fixed radio stations within the range in which the mobile radio station moves are determined. Corresponding to each position, the fixed wireless station holds information on the azimuth setting prohibited area that receives radio wave interference, detects the current position and the antenna installation azimuth prior to radio wave emission, the current position, the antenna installation azimuth and When there is a fixed radio station in proximity based on the information on the azimuth setting prohibited area, the antenna azimuth is controlled by calculating the antenna rotation angle so as to avoid the azimuth setting prohibited area.
[0011]
Further, the current position and the antenna installation direction are detected by a GPS (Global Positioning System) sensor and a geomagnetic sensor attached to a pole supporting the antenna.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing one embodiment of a mobile radio station according to the present invention.
[0013]
The present embodiment shown in FIG. 1 includes an antenna 11 and an antenna horizontal drive motor 13 for controlling the azimuth of the antenna 11, a mobile radio station 10 communicating with a partner station, and a fixed radio station close to the mobile radio station 10. 20.
[0014]
Next, the operation of the mobile radio station according to the present embodiment will be described in detail with reference to FIGS. FIG. 2 is a diagram for describing antenna azimuth control of the mobile radio station according to the present embodiment.
[0015]
2, the mobile radio station 10 includes an antenna 11, a mast 12, an antenna horizontal drive motor 13, a GPS sensor 14, a geomagnetic sensor 15, a fixed station position information ROM 16, and a CPU 17. ing.
[0016]
The GPS sensor 14 is attached to the mast 12 supporting the antenna 11, detects the current position of the mobile radio station 10, and sends the position information 41 to the CPU 17.
[0017]
The geomagnetic sensor 15 is attached to the mast 12 like the GPS sensor 14, detects the installation orientation of the antenna 11, and sends antenna installation orientation information 42 to the CPU 17.
[0018]
The fixed station position information ROM 16 stores the positions of all the fixed wireless stations 20 within the range in which the mobile wireless station 10 moves and the azimuth setting prohibition of the fixed wireless station 20 receiving the radio wave interference corresponding to the positions of the fixed wireless stations 20. The area is stored in, for example, a ROM.
[0019]
The CPU 17 sends out a reference signal to the fixed station position information ROM 16 based on the position information 41 (latitude and longitude) of the mobile station 10 and the position information 41 of the fixed station 20 at the current position and the direction setting prohibited area. It receives the information and determines whether the antenna orientation of the mobile radio station 10 is in the azimuth setting prohibited area, and notifies the antenna horizontal drive motor 13 of a control signal for avoiding the azimuth setting prohibited area.
[0020]
The antenna horizontal drive motor 13 rotates the antenna 11 attached to the mast 12 in a direction to avoid the azimuth setting prohibited area according to a control signal from the CPU 17.
[0021]
Next, the operation of the antenna orientation control according to the present embodiment will be described. FIG. 3 is a diagram for explaining the operation of the antenna orientation control according to the present embodiment.
[0022]
The mobile radio station 10 detects the current position by the GPS sensor 14 and detects the azimuth of the antenna 11 set by the geomagnetic sensor 15 in an initial state prior to radio wave radiation at the destination. Then, the detected position information 41 and antenna installation direction information 42 are output to the CPU 17.
[0023]
The CPU 17 sends the position information 41 from the GPS sensor 14 to the fixed station position information ROM 16 as a reference signal.
[0024]
Based on the position information 41 sent from the CPU 17, the fixed station position information ROM 16 stores the information on the position of the fixed wireless station 20 and the azimuth setting prohibited area 32 that is subject to radio wave interference from the To return.
[0025]
The CPU 17 determines the antenna 11 of the mobile radio station 10 based on the position information 41 from the GPS sensor 14, the antenna installation direction information 42 from the geomagnetic sensor 15, and the information on the direction setting prohibited area 32 from the fixed station position information ROM 16. It is determined whether or not the installation direction is directed to the azimuth setting prohibited area 32. If it is determined that the azimuth is oriented, the direction or rotation angle of the antenna 11 that avoids the azimuth setting prohibited area 32 is determined, and the antenna is used as a control signal. Notify the horizontal drive motor 13.
[0026]
In the example of FIG. 3, 31 is an initial value of the installation orientation of the antenna 11, 32 is an orientation setting prohibition region of the antenna 11, and 33 is an orientation of the antenna 11 after control.
[0027]
As described above, when starting communication at the destination, the mobile radio station 10 can transmit the radio wave before the radio wave emission even if the initial setting azimuth 31 of the antenna 11 is directed to the azimuth setting prohibited area 32 with respect to the fixed radio station 20. By controlling the azimuth so that the antenna 11 does not face the azimuth setting prohibited area 32, it is possible to prevent radio wave interference. In addition, the automatic operation can prevent human error.
[0028]
【The invention's effect】
As described above, according to the antenna orientation control method for a mobile radio station of the present invention, the fixed radio station transmits radio waves corresponding to the positions and positions of all the fixed radio stations in the area where the mobile radio station is expected to move. In the case where there is a fixed wireless station close to the mobile station by using the position information and the antenna installation direction information from the GPS sensor and the geomagnetic sensor provided in the mobile radio station, It is possible to automatically avoid the azimuth setting prohibited area for the fixed wireless station.
[0029]
Therefore, since the fixed radio station is automatically controlled to the antenna direction that does not cause radio interference, the trouble of confirming the presence or absence of the fixed radio station at the destination and manually adjusting the direction so as not to cause radio interference can be eliminated. At the same time, it has the effect of preventing radio interference due to human error.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing one embodiment of a mobile radio station according to the present invention.
FIG. 2 is a diagram for describing antenna azimuth control of a mobile radio station according to the present embodiment.
FIG. 3 is a diagram for explaining an operation of antenna azimuth control according to the present embodiment.
[Explanation of symbols]
Reference Signs List 10 mobile radio station 20 fixed radio station 11 antenna 12 mast 13 antenna horizontal drive motor 14 GPS sensor 15 geomagnetic sensor 16 fixed station position information ROM
17 CPU

Claims (6)

  1. A mobile wireless station having an antenna whose direction can be controlled, wherein a position detecting means for detecting a current position, an azimuth detecting means for detecting an antenna installation azimuth, and a fixed wireless station close to the current position receive radio interference. A storage unit for storing an azimuth setting prohibited area in advance, and the antenna azimuth based on the information on the current position, the antenna installation azimuth, and the azimuth setting prohibited area so that the antenna azimuth does not face the azimuth setting prohibited area. A mobile radio station comprising:
  2. 2. The mobile radio station according to claim 1, wherein said position detecting means is a GPS (Global Positioning System) sensor, and said azimuth detecting means is a geomagnetic sensor, both of which are attached to a pole supporting an antenna.
  3. 2. The storage device according to claim 1, wherein the storage unit holds at least information on the positions of all fixed wireless stations and the azimuth setting prohibited area corresponding to each position within a range in which the mobile wireless station moves. Mobile radio station as described.
  4. The antenna azimuth control means controls the azimuth of the rotatably mounted antenna based on information of the current position, the antenna installation azimuth, and the azimuth setting prohibited area before the mobile radio station radiates radio waves. The mobile radio station according to claim 1, 2 or 3, wherein
  5. An antenna azimuth control method for a mobile radio station having an azimuth-controllable antenna, wherein the fixed radio station transmits radio waves corresponding to every position of each fixed radio station within a range in which the mobile radio station moves. Holds information on the azimuth setting prohibited area subject to interference, detects the current position and the antenna installation azimuth prior to radio wave emission, and based on the current position, the antenna installation azimuth and the information on the azimuth setting prohibited area, An antenna direction control method for a mobile radio station, comprising: calculating an antenna rotation angle so as to avoid the azimuth setting prohibited area and controlling the antenna direction when there is a fixed radio station to perform.
  6. 6. The method according to claim 5, wherein the current position and the antenna installation direction are detected by a GPS (Global Positioning System) sensor and a geomagnetic sensor attached to a pole supporting the antenna. .
JP2002188595A 2002-06-27 2002-06-27 Mobile radio station and its antenna azimuth control method Pending JP2004032550A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002188595A JP2004032550A (en) 2002-06-27 2002-06-27 Mobile radio station and its antenna azimuth control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002188595A JP2004032550A (en) 2002-06-27 2002-06-27 Mobile radio station and its antenna azimuth control method

Publications (1)

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JP2004032550A true JP2004032550A (en) 2004-01-29

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JP2002188595A Pending JP2004032550A (en) 2002-06-27 2002-06-27 Mobile radio station and its antenna azimuth control method

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007111177A1 (en) * 2006-03-17 2007-10-04 Pioneer Corporation Radio communication device and radio communication system
JP2009260566A (en) * 2008-04-15 2009-11-05 Mitsubishi Electric Corp Communication control method
JP2010226544A (en) * 2009-03-25 2010-10-07 Nec Corp Communication apparatus, and method for reducing electromagnetic interference thereof
WO2011048831A1 (en) * 2009-10-23 2011-04-28 ボッシュ株式会社 Obstacle detection device for vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007111177A1 (en) * 2006-03-17 2007-10-04 Pioneer Corporation Radio communication device and radio communication system
JP2009260566A (en) * 2008-04-15 2009-11-05 Mitsubishi Electric Corp Communication control method
JP2010226544A (en) * 2009-03-25 2010-10-07 Nec Corp Communication apparatus, and method for reducing electromagnetic interference thereof
WO2011048831A1 (en) * 2009-10-23 2011-04-28 ボッシュ株式会社 Obstacle detection device for vehicle
JPWO2011048831A1 (en) * 2009-10-23 2013-03-07 ボッシュ株式会社 Obstacle detection device for vehicles

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