JPH03249827A - Mobile object radio communication system - Google Patents

Abstract

PURPOSE:To smootly and stably execute privacy communication by transmitting a transmission wave as a synthesized wave with a frequency beyond sound band with a slave equipment, permitting a main equipment to transmit receive the synthesized wave with the frequency beyond the sound band and allowing reception in other slave equipment to be disabled. CONSTITUTION:When one of the slave equipments 2-5 turns on a transmission switch 17 for communication with the main equipment 1 and makes a call by the synthesis wave with the frequency beyond the sound band, the main equipment 1 receiving it makes a call by the synthesized wave with the frequency beyond the sound band. When the transmission switch is turned on, respective switches of slave equipments 2-5 connected to detection circuits are simultaneously turned on and the devices except for the slave equipment that the amplifier 22 of a reception circuit intends transmission is not activated and the message system of a speaker 23 stops. Thus, communication between the slave device which is intended for transmission and the main device 1 is attained.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、１つの限定された地域内で、１つの主装置と
該主装置の指令を受ける複数の移動体である従属装置と
の間に同一の周波数の無線回線を介して送受信が行なわ
れる移動体無線通信システムに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a method for controlling communication between one main device and a plurality of mobile subordinate devices that receive commands from the main device within one limited area. The present invention relates to a mobile wireless communication system in which transmission and reception are performed via wireless lines of the same frequency.

（従来の技術〕 従来、この種の移動体無線通信システムは、１つの無線
回線で通話路が設定され、同一無線回線を主装置と複数
の従属装置との間で共用し、送話は全て同時に受イエさ
れるようになっていた。(Prior Art) Conventionally, in this type of mobile radio communication system, a call path is set up using one radio line, the same radio line is shared between a main device and a plurality of slave devices, and all outgoing calls are At the same time, I was starting to get rejected.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の移動体無線通信システムは、１つの従属
装置に緊急事態が発生した場合、その内容や処置に関す
る問い合わせを主装置に通知する通信路を設定して通話
すると、他の従属装置にも受信されて秘密性の確保はで
きず、また緊急に通信をしたい従属装置と主装置との間
の通信路が他の従属装置による悪意のない妨害（状況の
問い合せ等）で遮断されることもあり、さらに、他の従
属装置に対して混乱を生じさせ、秩序を乱す欠点がある
。In the conventional mobile wireless communication system described above, when an emergency situation occurs in one subordinate device, a communication channel is set up to notify the main device of the inquiry regarding the nature of the situation and how to deal with it. Once received, confidentiality cannot be ensured, and the communication path between the slave device and the main device that needs to communicate urgently may be blocked by non-malicious interference (such as status inquiries) by other slave devices. Moreover, it has the disadvantage of causing confusion and disorder to other subordinate devices.

本発明の目的は、緊急時、使用中の無線回線を使用し、
かつ他の従属装置が傍受できない状態で主装置と通信で
きる移動体無線通信システムを提供することである。The purpose of the present invention is to use wireless lines in use in an emergency,
It is an object of the present invention to provide a mobile wireless communication system that can communicate with a main device without being able to be intercepted by other subordinate devices.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の移動体無線通信システムは、 各従属装置は任意の音声帯域外周波数波を発生するトー
ン発生部と、該音声帯域外周波数波を送信回路の音声に
入力するミキサーと、受信波から前記音声帯域外周波数
波を通過させるフィルタと、いずれか１つの従属装置が
送信すると回路を接続するスイッチと、所定の信号を受
信すると該スイッチを復旧する手段と、前記フィルタを
通過した波の周波数とトーン発生部の出力波の周波数と
を比較して一致した場合、動作指示信号を出力する検出
器と、常時受信波を増幅器に接続し、前記スイッチによ
り前記検出器が接続されると、前記動作指示信号が人力
されたときのみ動作して受信波を増幅器に接続する手段
を有し、 主装置が、従属装置が有するものと同一のトーン発生部
と、ミキサーと、前記従属装置の検出器を接続するスイ
ッチの解放信号を発生する手段を有している。In the mobile radio communication system of the present invention, each slave device includes a tone generator that generates an arbitrary frequency wave outside the voice band, a mixer that inputs the frequency wave outside the voice band to the voice of a transmitting circuit, and a mixer that inputs the frequency wave outside the voice band to the voice of a transmitting circuit, and a filter for passing frequency waves outside the audio band; a switch for connecting the circuit when transmitted by any one slave device; means for restoring the switch when a predetermined signal is received; A detector that outputs an operation instruction signal when the frequency of the output wave of the tone generating section matches the frequency is connected to an amplifier, and when the detector is connected by the switch, the operation is started. The main device has a means for connecting the received wave to the amplifier, which operates only when an instruction signal is input manually, and the main device has the same tone generator, mixer, and detector of the slave device as the slave device has. It has means for generating a release signal for the connected switch.

（作　　　用） 従属装置の１つが主装置に対して通話するために送信用
スイッチを入れて音声帯域外周波数波との合成波で送話
すると、これを受信した主装置も同じ音声帯域外周波数
波との合成波で通話し、また、前記送信用スイッチを入
れたとき、同時に各従属装置の検出回路接続のスイッチ
が入り、受信回路の増幅器が送信を企図した従属装置以
外は動作しなくなりスピーカーの拡声が停止するので、
送信を企図した従属装置と主装置間のみの通話が行なわ
れる。(Function) When one of the slave devices turns on the transmission switch to make a call to the main device and sends a speech using a composite wave with a frequency wave outside the audio band, the main device that receives this also uses the same frequency outside the audio band. When the transmission switch is turned on, the detection circuit connections of each slave device are turned on at the same time, and the receiver circuit's amplifier stops operating except for the slave device intended for transmission, and the speaker The amplification will stop, so
A call is made only between the slave device and the master device that are intended to transmit.

（実　施　例） 次に、本発明の実施例について図面を参照して説明する
。(Example) Next, an example of the present invention will be described with reference to the drawings.

第１図は本発明の移動体無線通信レステムの一実施例の
主装置と従属装置それぞれのブロック図、第２図は第１
図に示す主装置と従属装置との配置関係を示す図、第３
図は・音声帯域外周波数波検出方法の説明図である。FIG. 1 is a block diagram of a main device and a slave device of an embodiment of the mobile wireless communication system of the present invention, and FIG.
A diagram showing the arrangement relationship between the main device and the slave device shown in the figure, No. 3
The figure is an explanatory diagram of a method for detecting frequency waves outside the audio band.

この移動体無線通信システムは固定局である主装置１と
、移動局である従属装置２〜５からなる。主装置１は従
来の、マイクロフォン６、アンテナ９、増幅器１２、ス
ピーカー１３、送信スイッチ８の他に、音声帯域外周波
数波例えば２００Ｈｚ波のトーン発生部１１と、送信回
路に該２００Ｈｚ波を挿入するミキサＦ７とミキサー７
にトーン発生部１１を接続するスイッチ１０と、１つの
音声周波多重信号である解放信号を発生する解放信号発
生部２４を有している。従属装置２〜５は主装置！どの
間に１つの共通の無線回線で通信を行うことができ、従
来の、アンテナ１８と、マイクロフォン１４と、送信ス
イッチ１７と、スピーカー２３の外に、主装置１と同じ
２００Ｈｚのトーン発生部１６と、ミキサー１５と、受
信回路から分岐された受信波から２００Ｈｚを帯域通過
させるフィルタ１９と、該フィルター１９を通過した出
力とトーン発生部１６からの２００Ｈｚ波とを比較して
周波数が一致すると信号“１”を出力し、一致しない場
合は信号“０”を出力する検出器２０と、従属装置２〜
５いずれか１つが送信スイッチ１７を入れると動作して
検出器２０の出力を増幅器２２に接続するスイッチ２ｉ
と、常時受信波を増幅してスピーカーに出力するが、ス
イッチ２１によって検出器２゜に接続されると信号“１
”が入力されたときだけ受信波を増幅してスピーカー２
３に出方する増幅器２２と、前記解放信号を受信すると
スイッチ２１を復旧する解放部２６を有している。This mobile radio communication system consists of a main device 1, which is a fixed station, and slave devices 2 to 5, which are mobile stations. In addition to the conventional microphone 6, antenna 9, amplifier 12, speaker 13, and transmission switch 8, the main device 1 includes a tone generator 11 that generates a frequency wave outside the audio band, for example, a 200Hz wave, and inserts the 200Hz wave into the transmission circuit. mixer F7 and mixer 7
A switch 10 connects a tone generating section 11 to a tone generating section 11, and a release signal generating section 24 generates a release signal which is one audio frequency multiplexed signal. Slave devices 2 to 5 are the main devices! In addition to the conventional antenna 18, microphone 14, transmission switch 17, and speaker 23, the same 200 Hz tone generator 16 as the main device 1 is used to communicate through one common wireless line. A mixer 15, a filter 19 that band-passes 200 Hz from the received wave branched from the receiving circuit, and a signal is generated when the output passing through the filter 19 and the 200 Hz wave from the tone generator 16 are compared and the frequencies match. A detector 20 that outputs “1” and outputs a signal “0” if they do not match, and slave devices 2 to
Switch 2i which operates when any one of 5 turns on the transmission switch 17 and connects the output of the detector 20 to the amplifier 22.
The received wave is always amplified and output to the speaker, but when connected to the detector 2° by the switch 21, the signal “1” is output.
” is input, the received wave is amplified and the speaker 2
3, and a release section 26 that restores the switch 21 upon receiving the release signal.

次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.

常時、従属装置２〜５は受信状態になっており、主装置
１からのアナウンスのみが問えるように設定されている
。いま、従属装置３に非常事態が発生し、主装置１に連
絡するものとする。従属装置３の送信スイッチ１７が送
信側に入れられると、マイクロフォン１４からのアンテ
ナ１８に至る送信回路にトーン発生部１６からの２００
Ｈｚがミキサー１５から挿入され、送話に２００Ｈｚが
合成されて送信される。またこのとき各従属装置２，４
．５のスイッチ２１が接続側に入り、増幅器２２の動作
が検出器２０の出力信号“０”によって停止される。主
装置１は従属装置３の送信を受信するとスイッチ１１を
接続側に入れてトーン発生部１１を送信回路に接続し、
従属装置３に対する送話を２００Ｈｚとの合成波とし、
送信スイッチ８を接続側に入れて通話する。The slave devices 2 to 5 are always in a receiving state and are set so that they can only listen to announcements from the main device 1. Now, assume that an emergency situation occurs in the slave device 3 and the main device 1 is contacted. When the transmitting switch 17 of the slave device 3 is turned on to the transmitting side, the 200 MHz signal from the tone generator 16 is transmitted to the transmitting circuit from the microphone 14 to the antenna 18.
Hz is inserted from the mixer 15, and 200 Hz is combined with the transmitted voice and transmitted. At this time, each slave device 2, 4
．． The switch 21 of No. 5 enters the connection side, and the operation of the amplifier 22 is stopped by the output signal "0" of the detector 20. When the main device 1 receives the transmission from the slave device 3, it turns on the switch 11 to connect the tone generator 11 to the transmitting circuit.
The transmission to the slave device 3 is a composite wave of 200Hz,
Turn the transmission switch 8 to the connection side and make a call.

この通話は従属装置３とのみ行なわれ、他の従属装置２
，４．５では受信できないことになり、秘話性が保たれ
る。その後、主装置１から解放信号が送出されると各従
属装置２〜５のスイッチ２１が解放され通常の受信状態
に復旧する。This call is made only with slave device 3, and other slave devices 2
, 4.5, it cannot be received, and confidentiality is maintained. Thereafter, when a release signal is sent from the main device 1, the switches 21 of each of the slave devices 2 to 5 are released and the normal reception state is restored.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、従属装置で送信波を音声
帯域外周波数との合成波として送信し、これに対して主
装置も同し音声帯域外周波との合成波で送受信し、他の
従属装置での受信を不能とすることにより、主装置への
通知、および主装置からの通信内容を他の従属装置に知
られずに行なうことができ、他の従属装置からの問い合
せ等による通信の妨害を防止しで、円滑、かつ安全な秘
話通信を行なうことができる効果がある。As explained above, in the present invention, the slave device transmits a transmission wave as a composite wave with a frequency outside the voice band, and the main device also transmits and receives the same wave as a composite wave with a frequency outside the voice band. By disabling reception on a slave device, it is possible to send notifications to the master device and the contents of communications from the master device without other slave devices knowing, and to prevent communication due to inquiries from other slave devices. This has the effect of preventing interference and allowing smooth and safe secret communication.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の移動体無線通信システムの一実施例の
主装置と従属装置それぞれのブロック図、第２図は第１
図に示す主装置と従属装置との配置関係を示す図、第３
図は音声帯域外周波数検出方法の説明図である。 １・・・主装置、　　　２〜５・・・従属装置、６．１
４・・・マイクロフォン、 ７．１５・・・ミキサー ８．１０．１７，２１．２５・・・スイッチ、９．１８
・・・アンテナ、 １１．１６・・・トーン発生部、 １２．２２・・・増幅器、 １３．２３・・・スピーカー １９・・・フィルター　２０・・・検出器、２４・・・
解放信号発生部、２６・・・解放部。FIG. 1 is a block diagram of a main device and a slave device of an embodiment of the mobile wireless communication system of the present invention, and FIG.
A diagram showing the arrangement relationship between the main device and the slave device shown in the figure, No. 3
The figure is an explanatory diagram of a method for detecting frequencies outside the audio band. 1...Main device, 2-5...Slave device, 6.1
4...Microphone, 7.15...Mixer 8.10.17,21.25...Switch, 9.18
...Antenna, 11.16...Tone generator, 12.22...Amplifier, 13.23...Speaker 19...Filter 20...Detector, 24...
Release signal generating section, 26... release section.

Claims (1)

【特許請求の範囲】 １、１つの限定された地域内で、１つの主装置と該主装
置の指令を受ける複数の移動体である従属装置との間に
同一の周波数の無線回線を介して送受信が行なわれる移
動体無線通信システムにおいて、 各従属装置は任意の音声帯域外周波数波を発生するトー
ン発生部と、該音声帯域外周波数波を送信回路の音声に
入力するミキサーと、受信波から前記音声帯域外周波数
波を通過させるフィルタと、いずれか１つの従属装置が
送信すると回路を接続するスイッチと、所定の信号を受
信すると該スイッチを復旧する手段と、前記フィルタを
通過した波の周波数とトーン発生部の出力波の周波数と
を比較して一致した場合、動作指示信号を出力する検出
器と、常時受信波を増幅器に接続し、前記スイッチによ
り前記検出器が接続されると、前記動作指示信号が入力
されたときのみ動作して受信波を増幅器に接続する手段
を有し、 主装置は、従属装置が有するものと同一のトーン発生部
と、ミキサーと、前記従属装置の検出器を接続するスイ
ッチの解放信号を発生する手段を有することを特徴とす
る移動体無線通信システム。[Claims] 1. Within one limited area, one main device and a plurality of mobile slave devices that receive commands from the main device are connected via wireless lines of the same frequency. In a mobile wireless communication system in which transmission and reception are performed, each slave device includes a tone generator that generates an arbitrary frequency wave outside the voice band, a mixer that inputs the frequency wave outside the voice band to the voice of a transmitting circuit, and a tone generator that generates a frequency wave outside the voice band. a filter for passing frequency waves outside the audio band; a switch for connecting the circuit when transmitted by any one slave device; means for restoring the switch when a predetermined signal is received; and a frequency of the wave passing through the filter. and the frequency of the output wave of the tone generator are compared, and if they match, a detector that outputs an operation instruction signal and a constantly received wave are connected to an amplifier, and when the detector is connected by the switch, the The main device has a means for connecting the received wave to the amplifier by operating only when an operation instruction signal is input, and the main device includes the same tone generator as that of the slave device, a mixer, and a detector of the slave device. 1. A mobile radio communication system, comprising means for generating a release signal for a switch connecting a switch.