JP2002141813A - Equipment and system for communication for moving object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide communication equipment for moving object, capable of preventing adverse influence upon medical electronic equipment without stopping the communication function. SOLUTION: When a regulation signal detecting means 4 detects a regulation signal, which is transmitted from a radio repeater station or medical electronic equipment, for preventing electromagnetic interference, a control circuit 3 suppresses the level of the frequencies to a transmit signal from a transmitting/ receiving circuit 2. Thus the spurious radiation of electromagnetic waves is reduced without stopping the communication function and an adverse influence, which is caused by electromagnetic waves, upon the medical electronic equipment such as cardiac pacemaker or hearing aid can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly to a mobile communication device capable of suppressing a transmission output when detecting a regulation signal for preventing electromagnetic interference.

[0002]

2. Description of the Related Art It is known that electromagnetic waves transmitted from a portable telephone adversely affect medical electronic devices such as a cardiac pacemaker. For this reason, it is recommended that a general mobile phone be at least 22 cm away from a cardiac pacemaker.
Then, in order to prevent the mobile phone from adversely affecting the medical electronic device, the power of the mobile phone is forcibly turned off or stopped in a specific space, or communication with the radio base station is performed by an interference radio wave. For example, a method has been invented that does not adversely affect medical electronic devices and the like. For example, Japanese Patent Application Laid-Open No. H11-308675 discloses an invention of a mobile telephone device, and Japanese Patent Application Laid-Open No. H11-88300 discloses an invention of a method and an apparatus for suppressing radiation of a mobile telephone.

[0003]

However, according to the above-mentioned conventional technology, no influence is exerted on the medical electronic device by not performing any communication, and during that time, the communication function which is an original function of the mobile communication device is not provided. There was a problem that it could not be used.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a mobile communication device capable of preventing adverse effects on medical electronic devices without stopping a communication function. I do.

[0005]

In order to achieve this object, according to the present invention, there is provided a mobile communication device, comprising: a control signal detecting means for detecting a control signal for preventing electromagnetic interference; And control means for suppressing the output of the transmission signal when the operation is performed. With this configuration, when the regulation signal is detected by the regulation signal detection unit, the control unit suppresses the output of the transmission signal, without stopping the communication function, reducing unnecessary radiation of electromagnetic waves, It is possible to reduce adverse effects of electromagnetic waves on a cardiac pacemaker and the like.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a block diagram of a mobile communication device according to an embodiment of the present invention. As shown in FIG. 1, the mobile communication device includes an antenna 1, a transmission / reception circuit 2, a control circuit 3, a regulation signal detection unit 4, an input unit 5, a display unit 6, a microphone (hereinafter, referred to as a microphone) 7, and a speaker. 8 is provided. The antenna 1 is connected to the transmission / reception circuit 2. Further, the transmission / reception circuit 2, the regulation signal detection means 4, the input means 5, the display means 6, the microphone 7 and the speaker 8 are connected to the control circuit 3.

[0008] The antenna 1 transmits and receives radio waves. The transmission / reception circuit 2 processes a transmission signal transmitted to the antenna 1 and a reception signal received from the antenna 1. The control circuit 3 has a function of controlling the entire mobile communication device. When the regulation signal detecting means 4 detects a regulation signal from the outside, the control circuit 3
Is instructed to suppress the output level or output frequency of the transmission signal to a predetermined value or a value included as information in the regulation signal. Here, the regulation signal may be configured to receive the electromagnetic wave from the antenna 1 as a medium, or the mobile communication device may be provided with an infrared sensor or an ultrasonic sensor to receive infrared or ultrasonic waves as a medium. You may. The input means 5 usually comprises a button switch for inputting a telephone number or the like. It can also be used as a means for performing various settings in the mobile communication device. The display means 6 is a display device such as a liquid crystal display device,
It can also be used as a means to inform users that they are communicating at a reduced transmission power (level or frequency),
User convenience can be improved. In addition to the liquid crystal screen, an indicator using an LED (Light Emitting Diode) can be used. The microphone 7 is a microphone used for a normal call. The voice input from the microphone 7 can be recognized by the control circuit 3 as a substitute for the input means 5. The speaker 8 is used for normal call or ringing for notifying of an incoming call, and can also be used as means for notifying a user that communication is being performed with suppressed transmission output.

In the mobile communication device configured as described above, the control circuit 3 processes a transmission signal transmitted to the antenna 1 and a reception signal received from the antenna 1. When detecting the regulation signal, the regulation signal detection unit 4 instructs the control circuit 3 to suppress the output level or the output frequency of the transmission signal to a predetermined value or a value included as information in the regulation signal. I do. As a result, the transmission / reception circuit 2
Since the level or frequency of the signal transmitted from the PC is suppressed, unnecessary radiation of electromagnetic waves can be reduced, and adverse effects of the electromagnetic waves on cardiac pacemakers and the like can be reduced.
In addition, since communication is not prohibited, communication with a wireless relay station or a wireless base station can be continued as much as possible under the suppressed transmission conditions. In particular, when the wireless relay station is in the vicinity, communication can be performed even at a weak output level, so that the communication state can be maintained.

FIG. 2 is a diagram showing a configuration of a mobile communication system according to an embodiment of the present invention. This mobile communication system includes a mobile communication device 11, a radio relay station 12, and a radio base station 13.
It is composed of

The mobile communication device 11 has the configuration shown in FIG. The wireless relay station 12 includes an antenna 12a on the mobile communication device side.
And an antenna 12b on the wireless base station side.
The wireless communication link 16 communicates with the mobile communication device 11, and the third wireless communication link 18 communicates with the wireless base station 13. The wireless relay station 12 has a cover area 15. The mobile communication device 11 can also directly communicate with the wireless base station 13. The medical electronic device 14 is, for example, a cardiac pacemaker or a hearing aid, and transmits a regulation signal to the mobile communication device 11 via the second wireless communication link 17.

In the mobile communication system having the above configuration, the mobile communication device 11 does not receive the regulation signal when the radio relay station 12 or the medical electronic device 14 is not in the vicinity, so that the mobile communication device 11 has a normal transmission output. It communicates directly with the wireless base station 13.
The wireless relay station 12 transmits a restriction signal for preventing electromagnetic wave interference to the mobile communication device 11 existing within its own coverage area 15. The restriction signal reaches the mobile communication device 11 through the first wireless communication link 16. When recognizing the regulation signal, the mobile communication device 11 performs communication while suppressing the transmission output to the regulation value. In addition, when the wireless relay station 12 does not transmit the control signal, the medical electronic device 14 can transmit the control signal, and the control signal is transmitted to the mobile communication device 11 via the second wireless communication link 17.

When the radio relay station 12 transmits a regulation signal, the mobile communication device 11 is located near the radio relay station 12.
Even with the suppressed transmission output, it is possible to indirectly communicate with the wireless base station 13 via the wireless relay station 12. For example,
The antenna 12a on the mobile communication device side of the wireless relay station 12 is installed near the ceiling inside a building such as a medical facility or inside a vehicle such as a train, and the transmission output of the mobile wireless device 11 is used for a cardiac pacemaker, a hearing aid, etc. Can be limited to a value that does not adversely affect even if it is brought close to the medical electronic device 14. This limit value may be a fixed value, or may be a method of giving an instruction from the wireless relay station 12 by a regulation signal. Also, if the user pays attention to the method of use, the user can release the restriction.

On the other hand, since the third wireless communication link 18 between the wireless relay station 12 and the wireless base station 13 communicates with a normal transmission output, the antenna 12 on the base station side of the wireless relay station 12
b, when installed on a place where there is no risk of approaching a cardiac pacemaker or a hearing aid, for example, on the roof of a building or a train, the communication by the third wireless communication link 18 may adversely affect the cardiac pacemaker or the hearing aid. It is possible without giving.

As described above, according to the embodiment of the present invention, when the restriction signal is detected by the restriction signal detection means 4, the control circuit 3 controls the transmission / reception circuit 2.
By suppressing the output of the transmission signal transmitted from, without stopping the communication function, reduce unnecessary radiation of electromagnetic waves,
The adverse effects of electromagnetic waves on a cardiac pacemaker, a hearing aid, and the like can be reduced.

Since communication is not prohibited, communication with a radio relay station or a radio base station can be continued as much as possible under the suppressed transmission conditions. In particular, when a wireless relay station is in the vicinity, communication is possible even with a weak transmission output, so that the communication state can be maintained.

Furthermore, by including a method for suppressing the level or frequency of the transmission signal as information in the restriction signal, it is possible to perform restriction in accordance with the convenience of the side transmitting the restriction signal.

[0018] The user can be informed of the fact that communication is being carried out at the suppressed transmission level or transmission frequency by displaying on the screen, turning on or blinking an LED, sound, mechanical vibration, etc. People can be notified visually, auditoryly, physically, etc., and convenience is enhanced.

Further, by providing a configuration in which the contents of the regulation are displayed on the screen to notify the user, the convenience is enhanced.

Further, if the medium of the regulation signal is radio waves,
The antenna and the receiving circuit of the mobile communication device can be shared with the existing one, and the use of infrared rays or ultrasonic waves has the advantage that there is no electromagnetic interference due to the regulation signal itself.

[0021] The user can also specify whether to suppress the transmission output or the transmission frequency. For example, convenience is enhanced by using the method in conjunction with a manner mode of a mobile phone.

Further, by configuring the medical electronic device to be able to transmit the regulation signal, it is possible to effectively protect the medical electronic device from electromagnetic interference.

Further, by configuring the radio relay station and the radio base station so as to be able to transmit the regulation signal, it is possible to secure a space where electromagnetic interference is unlikely to occur. In particular, public transportation such as trains and buses and medical facilities are effective in protecting medical electronic devices such as cardiac pacemakers and hearing aids.

[0024]

As described above in detail, according to the mobile communication device of the present invention, when the restriction signal is detected, the output of the transmission signal is suppressed, so that the communication function is not stopped. In addition, unnecessary radiation of electromagnetic waves can be reduced, and adverse effects of the electromagnetic waves on cardiac pacemakers can be reduced.

According to the mobile communication system of the present invention, for example, if a train is provided with a radio relay station so that a mobile communication device in the train can communicate with weak electric power, the passenger can use the mobile communication device in the train. It is possible to realize excellent mobile communication such as mobile phone communication which does not cause a malfunction of a cardiac pacemaker, a hearing aid, and the like which are present, and is compatible with a communication function which is an original function.

[Brief description of the drawings]

FIG. 1 is a block diagram of a mobile communication device according to an embodiment of the present invention;

FIG. 2 is a configuration diagram of a mobile communication system according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 antenna 2 transmission / reception circuit 3 control circuit 4 control signal detection means 5 input means 6 display means 7 microphone 8 speaker 11 mobile communication device 12 wireless relay station 12a antenna on mobile communication device side of wireless relay station 12b base of wireless relay station Station side antenna 13 Wireless base station 14 Medical electronic equipment 15 Coverage area of wireless relay station 16 First wireless communication link 17 Second wireless communication link 18 Third wireless communication link

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference)

Claims (19)

[Claims] 1. A control signal detecting means for detecting a control signal for preventing an electromagnetic wave interference, and a control means for suppressing output of a transmission signal when the control signal is detected. Mobile communication equipment. 2. The mobile communication device according to claim 1, wherein the suppression of the output is suppression of a level of a transmission signal. 3. The mobile communication device according to claim 1, wherein the suppression of the output is suppression of a frequency of a transmission signal. 4. The output according to claim 1, wherein the output is suppressed using control information included in the regulation signal.
A mobile communication device according to claim 1. 5. The mobile communication device according to claim 1, further comprising notification means for notifying that the transmission is being performed while the output is suppressed. 6. The mobile communication device according to claim 5, wherein said notification means performs a visual display. 7. The mobile communication device according to claim 5, wherein said notifying means notifies by sound. 8. The mobile communication device according to claim 5, wherein said notifying means notifies by a mechanical vibration. 9. The mobile communication device according to claim 4, wherein the suppression method based on the restriction signal is displayed on a screen of an image display unit. 10. The mobile communication device according to claim 1, wherein the regulation signal uses a radio wave as a medium. 11. The mobile communication device according to claim 1, wherein the regulation signal uses infrared rays as a medium. 12. The mobile communication device according to claim 1, wherein the regulation signal uses an ultrasonic wave as a medium. 13. The mobile communication device according to claim 1, wherein the user can specify whether to suppress the transmission output. 14. A medical electronic device having a function of transmitting a regulation signal for preventing electromagnetic interference. 15. A wireless relay station for a mobile communication system, having a function of transmitting a restriction signal for preventing electromagnetic interference to a mobile communication device. 16. A radio base station for a mobile communication system having a function of transmitting a restriction signal for preventing electromagnetic interference to a mobile communication device. 17. A vehicle comprising the wireless relay station according to claim 15. 18. A medical facility comprising the wireless relay station according to claim 15 or the wireless base station according to claim 16. 19. An arbitrary number of mobile communication devices according to claim 1, and a wireless relay station or claim 1 according to claim 15.
A mobile communication system comprising the wireless base station according to claim 6.