JPH0248833A - Radio communication system - Google Patents

Abstract

PURPOSE:To avoid useless transmission and to reduce the power consumption by giving an inquiry about each slave station from a master station as to whether there is any state change in each slave station in a short period and requesting each slave station as to the present state in a long period. CONSTITUTION:A timer for a short period and a timer for a long period are provided on a timer circuit 106 of a master station, a control circuit 101 sets the timer for a short period, form which a transmission instruction is outputted while a slave station or a relay station is designated to a signal transmission circuit 102. The circuit 102 generates an inquiry signal and sends it, a reply signal reception circuit 103 receives a reply from the slave station on a repeater, if any, and informs it to the control circuit 101. The circuit 101 activates the long period timer and uses a transmission circuit 104 so as to send a state request signal to the slave station or the repeater sending a reply signal, the slave station or the repeater operates a state change monitoring circuit 206 and when the result of monitor is addressed in its own station, it is stored in a storage circuit 207 and the content is sent to the master station.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は親局を中心に構成される無線通信システムに係
り、特に子局や中継局の監視技術に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wireless communication system configured mainly around a master station, and particularly relates to a technique for monitoring slave stations and relay stations.

（従来の技術） 無線通信システムは、多くの場合中継局を有し、例えば
第７図に示すように構成される。即ち、親局７１と、こ
の親局７１を中心に散在する複数の子局７３、同７３、
・・・および中継局７２とで構成される。(Prior Art) A wireless communication system often includes a relay station, and is configured as shown in FIG. 7, for example. That is, a master station 71, a plurality of slave stations 73 scattered around the master station 71,
... and a relay station 72.

この種の親局を中心に構成される無線通信システムでは
、親局が子局や中継局の状態を監視する方式が採用され
るが、従来の監視方式は例えば第８図に示すようになっ
ている。第８図において、親局は数秒程度の短周期タイ
マをセットしくステップ８１）、ある１つの局（子局ま
たは中継局）に対し状態要求信号を送信する（ステップ
８２）。In this type of wireless communication system configured mainly around a master station, a method is adopted in which the master station monitors the status of slave stations and relay stations. ing. In FIG. 8, the master station sets a short period timer of several seconds (step 81), and transmits a status request signal to a certain station (child station or relay station) (step 82).

そして、該当局からの状態信号が受信されるとくステッ
プ８３）、それについて所定の処理をし、規定時間経過
を待って先のステップ８１へ戻る。Then, when a status signal from the corresponding station is received (step 83), a predetermined process is performed on it, and the process returns to step 81 after waiting for the elapse of a specified period of time.

一方、該当局からの状態信号が受信されず（ステップ８
３）、その状態が規定時間経過すると（ステップ８４）
異常処理等を行い先のステップ８１へ戻る０次いで１次
の局について同様のことを行い、それを全局について行
う。On the other hand, the status signal from the corresponding station is not received (step 8
3) When the state has passed for a specified period of time (step 84)
Process the abnormality and return to step 81. The same process is performed for the 0th and 1st order stations, and then for all stations.

一方、子局や中継局では、自局向けの状態要求信号を受
信すると（ステップ８５）、警報発生の有無や正常か否
か等について自局内の各部の状態を収集し、その自局の
状態を示す状態信号を送信する（ステップ８６）。On the other hand, when the slave station or relay station receives the status request signal for its own station (step 85), it collects the status of each part within its own station, such as whether an alarm has occurred or not and whether it is normal or not. A status signal indicating the status is transmitted (step 86).

（発明が解決しようとする課題） しかしながら、前述した従来の監視方式にあっては、親
局が短周期で各局へ要求を出し各局は短周期で自局の状
態を親局へ送信するようにしているが、これだと自局の
状態が警報状態になく正常である場合も親局へ応答乙な
ければならないことになる。この場合、自局が呼び出さ
れる頻度が高いので、無駄な電力消費がある０例えば、
僻地にある局のように電池電源に頼らざるを得ない場合
もあるので、この問題は重要である。(Problem to be Solved by the Invention) However, in the conventional monitoring system described above, the master station issues requests to each station in short cycles, and each station sends its own status to the master station in short cycles. However, in this case, even if the own station is not in an alarm state and is normal, it will have to respond to the master station. In this case, since the own station is called frequently, there is unnecessary power consumption.For example,
This issue is important because stations in remote areas may have to rely on battery power.

本発明は、このような従来の問題点に鑑みなされたもの
で、その目的は、子局や中継局に無駄な電力消費を生じ
させずに親局が各局の監視をなし得る無線通信システム
を提供することにある。The present invention was made in view of these conventional problems, and its purpose is to provide a wireless communication system in which a master station can monitor each station without causing wasteful power consumption to slave stations or relay stations. It is about providing.

（課題を解決するための手段） 前記目的を達成するために、本発明の無線通信システム
は次の如き構成を有する。(Means for Solving the Problems) In order to achieve the above object, the wireless communication system of the present invention has the following configuration.

即ち、本発明の無線通信システムは、親局と複数の子局
、または、親局と複数の子局および１または複数の中継
局とで構成される無線通信システムにおいて；　親局は
、短周期で各局に対し問い掛け信号を送信し応答信号を
収集する手段と；前記短周期の問い掛け信号に対して応
答のあった局に対し状態要求信号を送信し状態信号を収
集する手段と；　長周期で各局に対し状態要求信号を送
信し状態信号を収集する手段と；　を備え、子局と中継
局は、自局の状態変化を監視しその監視結果を記憶保持
する手段と；　前記問い掛け信号の受信に対し自局に状
態変化があったときにのみ前記応答信号を返送する手段
と；　前記状態要求号の受信に対し自局の状態を示す前
記状態信号を返送する手段と；　を備えていることを特
徴とするものである。That is, the wireless communication system of the present invention is a wireless communication system configured with a master station and a plurality of slave stations, or a master station, a plurality of slave stations, and one or more relay stations; means for transmitting interrogation signals to each station and collecting response signals; means for transmitting status request signals to stations that have responded to the short-cycle interrogation signals and collecting status signals; means for transmitting status request signals to each station and collecting status signals; means for each slave station and relay station to monitor status changes of their own stations and store and hold the monitoring results; and receiving the interrogation signal. means for returning the response signal only when there is a state change in the own station; and means for returning the status signal indicating the state of the own station in response to reception of the status request signal; It is characterized by:

（作　用） 次に、前記の如く構成される本発明の無線通信システム
の作用を説明する。(Function) Next, the function of the wireless communication system of the present invention configured as described above will be explained.

子局と中継局は、自局の状態変化を常時監視しその監視
結果を記憶保持する。そして、親局の短周期の問い掛け
信号に対しては自局に状態変化があったときにそのこと
を知らせるために応答信号を返送し、その後に送信する
状態信号によって自局内の状態変化の内容を知らせる。The slave stations and relay stations constantly monitor changes in the status of their own stations and store and retain the monitoring results. In response to the short-cycle interrogation signal from the master station, a response signal is sent back to notify the local station when there is a change in status, and the status signal transmitted thereafter indicates the content of the status change within the local station. Let me know.

これにより親局は警報状態等となった局を知ることがで
きる。This allows the master station to know which stations are in an alarm state or the like.

一方、親局からの状態要求信号に対しては状態変化があ
った局のみならず、状態変化がなく良好な状態にある局
も状態信号によって自局の状態を知らせる。これにより
親局は短周期の問い掛け信号に対して応答を返さなかっ
た局の状態、即ち装置故障のため応答を返せなかったの
か否か等を知ることができる。On the other hand, in response to the status request signal from the parent station, not only stations whose status has changed, but also stations that are in good condition with no status change notify their own status by status signals. This allows the master station to know the status of the station that did not return a response to the short-cycle interrogation signal, ie, whether or not it was unable to return a response due to a device failure.

斯くして、親局は正しい監視が行え、また良好な状態に
ある子局または中継局は無駄な送信をすることがなくな
り消費電力を低減できることになる。In this way, the master station can perform proper monitoring, and the slave stations or relay stations that are in good condition do not perform unnecessary transmissions, thereby reducing power consumption.

（実　施　例） 以下、本発明の実施例を図面を参照して説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.

本発明の無線通信システムにおける監視方式を実施する
親局は例えば第１図に示すように、また子局（中継局）
は例えば第２図に示すようにそれぞれ構成される。The master station implementing the monitoring method in the wireless communication system of the present invention is, for example, as shown in FIG.
are each constructed as shown in FIG. 2, for example.

第１図において、親局は、制御回路１０１と、問い掛け
信号送信回路１０２と、応答信号受信回路１０３と、状
態要求信号送信回路１０４と、状態信号受信回路１０５
と、タイマ回路１０６と、共用器１０７と、受信機１０
８と、復号器１０９と、送信機１１０と、符号器１１１
と、アンテナ１１２とを基本的に備える。In FIG. 1, the master station includes a control circuit 101, an interrogation signal transmission circuit 102, a response signal reception circuit 103, a status request signal transmission circuit 104, and a status signal reception circuit 105.
, timer circuit 106 , duplexer 107 , and receiver 10
8, a decoder 109, a transmitter 110, and an encoder 111
and an antenna 112.

また、第２図において、子局（中継局）は、制御回路２
０１と、問い掛け信号受信回路２０２と、応答信号送信
回路２０３と、状態要求信号受信回路２０４と、状態信
号送信回路２０５と、状態変化監視回路２０６と、記憶
回路２０７と、共用器２０８と、受信機２０９と、復号
器２１０と、符号器２１１と、送信機２１２と、アンテ
ナ２１３とを基本的に備える。In addition, in FIG. 2, the slave station (relay station) is connected to the control circuit 2.
01, interrogation signal reception circuit 202, response signal transmission circuit 203, status request signal reception circuit 204, status signal transmission circuit 205, status change monitoring circuit 206, storage circuit 207, duplexer 208, and reception It basically includes a machine 209, a decoder 210, an encoder 211, a transmitter 212, and an antenna 213.

次に、第４図乃至第６図を参照して本発明の監視方式を
説明する。Next, the monitoring system of the present invention will be explained with reference to FIGS. 4 to 6.

親局のタイマ回路１０６には短周期用のタイマと長周期
用のタイマを設けてあり、親局はこれらのタイマに基づ
き短周期の監視（第４図）と長周期の監視（第５図）お
よび長短周期の併用監視（第６図）を行う。The timer circuit 106 of the master station is provided with a short-cycle timer and a long-cycle timer, and the master station performs short-cycle monitoring (Figure 4) and long-cycle monitoring (Figure 5) based on these timers. ) and combined monitoring of long and short cycles (Figure 6).

まず、第４図において、親局では、制御回路１０１が短
周期用のタイマをセットし、問い掛け信号送信回路１０
２に対し該当局（子局または中継局）を指定して送信指
令を出力する（ステップ４００）、これを受けて、問い
掛け信号送信回路１０２は、第３図（ａ）（１）に示す
ように、該当局の識別番号および当該問い掛け信号の表
示（種別Ａ）を含む問い掛け信号を作成し、それを符号
器１１１に対し出力するので、問い掛け信号が符号器１
１１、送信機１１０、共用器１０７を介したアンテナ１
１２から送出される（ステップ４０１）、そして、子局
（中継局）が応答信号を送信すると、それはアンテナ１
１２、共用器１０７、受信機１０８、復号器１０９を介
した応答信号受信回路１０３にて受信され、その旨が制
御回路１０１へ通知されるので、制御回路１０１は前記
指令出力後は応答信号受信回路１０３から受信通知があ
るか否かの判定動作を行う（ステップ４０２）、規定時
間内に受信通知がなければステップ４０２の判定結果は
否定（ＮＯ）となり先のステップ４００へ戻り、次の該
当子局く中継局）を指定して送信指令を問い掛け信号送
信回路１０２に対して出力する。一方、規定時間内に受
信通知があればステップ４０２の判定結果は肯定（ＹＥ
Ｓ）となるので、次のステップ４０３へ進み、制御回路
１０１は応答信号を返した該当局に対し状態要求信号（
第３図（ａ　）（２＞）を送信させる指令を状態要求信
号送信回路１０４へ出力する。その結果、状態要求信号
送信回路１０４が作成した状態要求信号（第３図（ａ　
＞（２））において種別Ｂで区別される）が符号器１１
１、送信器１１０、共用器１０７、アンテナ１１２を介
して送出される。First, in FIG. 4, in the master station, the control circuit 101 sets a short-cycle timer, and the interrogation signal transmitting circuit 10
2, the corresponding station (slave station or relay station) is designated and a transmission command is output (step 400). Upon receiving this, the interrogation signal transmission circuit 102 transmits a transmission command as shown in FIG. 3(a)(1). Then, an interrogation signal including the identification number of the corresponding station and an indication of the interrogation signal (type A) is created and outputted to the encoder 111, so that the interrogation signal is transmitted to the encoder 1.
11, transmitter 110, antenna 1 via duplexer 107
12 (step 401), and when the slave station (relay station) transmits a response signal, it is transmitted from antenna 1.
12. The response signal is received by the response signal receiving circuit 103 via the duplexer 107, the receiver 108, and the decoder 109, and the control circuit 101 is notified of this, so the control circuit 101 receives the response signal after outputting the command. A judgment operation is performed to determine whether or not there is a reception notification from the circuit 103 (step 402). If there is no reception notification within a specified time, the judgment result in step 402 becomes negative (NO), and the process returns to step 400 to proceed to the next corresponding step. A transmission command is output to the interrogation signal transmission circuit 102 by specifying a slave station or a relay station. On the other hand, if there is a reception notification within the specified time, the determination result in step 402 is affirmative (YE
S), the process advances to the next step 403, and the control circuit 101 sends the status request signal (S) to the corresponding station that returned the response signal.
A command to transmit (2>) in FIG. 3(a) is output to the state request signal transmitting circuit 104. As a result, the state request signal generated by the state request signal transmitting circuit 104 (Fig. 3(a)
> (2)) is distinguished by type B) is the encoder 11
1. It is sent out via the transmitter 110, duplexer 107, and antenna 112.

斯くして、該当子局（中継局）が送信した状態信号（第
３図（ｂ　）（２））がアンテナ１１２、共用器１０７
、受信機１０８、復号器１０９を介した状態信号受信回
路１０５にて受信されるので（ステップ４０４）、制御
回路１０１はその状態信号を受は取り所定処理をすると
ともに、規定時間の経過を待って先のステップ４００へ
戻り、次の該当子局（中継局）への制御に移る。In this way, the status signal (FIG. 3(b) (2)) transmitted by the corresponding slave station (relay station) is transmitted to the antenna 112 and the duplexer 107.
, the status signal is received by the status signal receiving circuit 105 via the receiver 108 and the decoder 109 (step 404), so the control circuit 101 receives the status signal, performs predetermined processing, and waits for the elapse of a specified time. Then, the process returns to the previous step 400 and moves on to control the next applicable slave station (relay station).

一方、子局（中継局）では、制御回路２０１は、状態変
化監視回路２０６を制御して自局的各部において警報等
の発生有無を監視し、その監視結果を記憶回路２０７に
記憶保持させることを行う（ステップ４１０）一方、こ
れと並行してステップ４１１の判定動作を行う、親局送
信に係る前記問い掛け信号はアンテナ２１３、共用器２
０８、受信機２０９、復号器２１０を介した問い掛け信
号受信口ｌｉ′８２０２にて受信解読され、それが自局
宛のものであれば受信通知が制御回路２０１へ出力され
る。On the other hand, in the slave station (relay station), the control circuit 201 controls the status change monitoring circuit 206 to monitor the occurrence of an alarm, etc. in each part of the local station, and causes the storage circuit 207 to store and hold the monitoring results. (Step 410) Meanwhile, in parallel with this, the determination operation of Step 411 is performed.
08, the interrogation signal is received and decoded at the interrogation signal receiving port li' 8202 via the receiver 209 and decoder 210, and if it is addressed to the own station, a reception notification is output to the control circuit 201.

その結果、ステップ４１１の判定結果は肯定（ＹＥＳ）
となり、次に制御回路２０１は記憶回路２０７をアクセ
スしてその記憶内容を読み出し、状態変化があったか否
かを判定する（ステップ４１２）、判定結果が否定（Ｎ
Ｏ）であれば、つまり良好な状態であれば先のステップ
４１０へ戻り、定常的な自局的監視動作に専念する。逆
に判定結果が肯定（ＹＥＳ）であれば、つまり警報等が
発生していればそれを親局へ通知するために応答信号送
信回路２０３へ送信指令を出力する。その結果、応答信
号送信回路２０３で応答信号（第３図（ｂ）（１））が
作成され、それが符号器２１１、送信機２１２、共用器
２０８、アンテナ２１３を介して送出される（ステップ
４１３）、これに対して親局が状態要求信号（第３図（
ａ　）（２））を送信すると、それはアンテナ２１３、
共用器２０８、受信機２０９、復号器２１０を介した状
態要求信号受信回路２０４にて受信解読され、それが自
局宛のものであればその旨が制御回路２０１へ通知され
るので、制御回路２０１は前記指令出力後はステップ４
１４の判定を行い状態要求信号受信回路２０４からの受
信通知を待つ、そして、受信通知があると、ステップ４
１４の判定結果は肯定（ＹＥＳ）となり、制御回路２０
１は状態が変化した現在の自局の状態を付した送信指令
を状態信号送信回路２０５へ出力する。その結果、状態
信号送信回路２０５で状態信号（第３図（ｂ　）（２）
）が作成され、それが符号器２１１、送信機２１２、共
用器２０８、アンテナ２１３を介して送出される（ステ
ップ４１５）、制御回路２０１は自局的監視動作を継続
する（ステップ４１０）。As a result, the determination result in step 411 is affirmative (YES).
Then, the control circuit 201 accesses the memory circuit 207, reads the memory contents, and determines whether or not there has been a change in state (step 412), and if the determination result is negative (N
O), that is, if the condition is good, the process returns to step 410 and concentrates on regular local monitoring operations. Conversely, if the determination result is affirmative (YES), that is, if an alarm or the like has occurred, a transmission command is output to the response signal transmission circuit 203 to notify the master station. As a result, a response signal (FIG. 3(b) (1)) is created in the response signal transmission circuit 203, and is sent out via the encoder 211, transmitter 212, duplexer 208, and antenna 213 (step 413), in response, the master station sends a status request signal (Fig. 3 (
a) When transmitting (2)), it is transmitted by the antenna 213,
The status request signal is received and decoded by the status request signal receiving circuit 204 via the duplexer 208, the receiver 209, and the decoder 210, and if it is addressed to the own station, the control circuit 201 is notified to that effect, so the control circuit 201 is step 4 after outputting the command.
14 and waits for a reception notification from the status request signal receiving circuit 204. When there is a reception notification, step 4 is performed.
14 is affirmative (YES), and the control circuit 20
1 outputs to the status signal transmitting circuit 205 a transmission command with the current status of its own station whose status has changed. As a result, the status signal transmission circuit 205 receives the status signal (FIG. 3(b) (2)).
) is created and transmitted via the encoder 211, transmitter 212, duplexer 208, and antenna 213 (step 415), and the control circuit 201 continues the local monitoring operation (step 410).

以上の短周期監視動作では、親局は警報状態になった等
の状態変化のあった局を認識できるが、例えば送信機の
故障、受信機の故障や電源ダウン等の装置故障のため応
答を返せない子局（中継局）があることも考えられる。In the short-cycle monitoring operation described above, the master station can recognize stations whose status has changed, such as becoming in an alarm state, but cannot respond due to equipment failure such as a transmitter failure, receiver failure, or power failure. It is also possible that there are slave stations (relay stations) that cannot be returned.

そこで、親局は、第５図に示す如き長周期監視動作を行
う。Therefore, the master station performs a long-period monitoring operation as shown in FIG.

第５図において、親局では、制御回路１０１が長周期用
のタイマをセットし、状態要求信号送信回路１０４に対
し該当局（子局または中継局）を指定して送信指令を出
力する（ステップ５００　＞。In FIG. 5, in the master station, the control circuit 101 sets a long-cycle timer, specifies the relevant station (slave station or relay station), and outputs a transmission command to the status request signal transmission circuit 104 (step 500>.

その結果、該当局へ状態要求信号（第３図（ａ）（２）
）が送信されるので（ステップ５０１）、制御回路１０
１では状態信号（第３図（ｂ　）（２））を受信したか
否かを判定しくステップ５０２）、判定結果が肯定（Ｙ
ＥＳ）であれば該当局は正常であると認定して、ステッ
プ５００へ戻り、次の該当局の監視に移行する０、ｔな
、判定結果が否定（ＮＯ）であれば、該当局は異常であ
ると認定して、規定時間の経過を待って（ステップ５０
３）　、ステップ５００へ戻り、同様のことを行う。As a result, a status request signal (Figure 3(a)(2)) is sent to the relevant station.
) is transmitted (step 501), the control circuit 10
1, it is determined whether or not the status signal (FIG. 3(b) (2)) has been received (step 502), and the determination result is affirmative (Y
If the judgment result is negative (NO), the corresponding station is determined to be normal, and the process returns to step 500 to move on to monitoring the next corresponding station.If the judgment result is negative (NO), the corresponding station is abnormal. Wait for the specified time to pass (step 50).
3) Return to step 500 and do the same thing.

親局では、以上の動作を全ての局について行う。The master station performs the above operations for all stations.

一方、子局や中継局では、自局向けの状態要求信号（第
３図（ａ　）（２））を受信するとくステップ５０６）
、警報発生の有無や正常か否か等について自局内の各部
の状態を収集し、その自局の現在の状態を示す状態信号
（第３図（ｂ　）（２））を送信する（ステップ５０７
）、要するに、子局や中継局では、親局からの状態要求
信号に対しては、前記応答信号（第３図（ｂ）（１））
の返送の有無、つまり、自局に状態変化があったか否か
を問わず、必ず状態信号（第３図（ｂ　）（２））を返
送するのである。On the other hand, the slave station or relay station receives the status request signal (FIG. 3(a)(2)) directed to its own station (step 506).
, collects the status of each part in its own station, such as whether an alarm has occurred or not and whether it is normal or not, and transmits a status signal (FIG. 3 (b) (2)) indicating the current status of its own station (step 507
), In short, in a slave station or relay station, in response to a status request signal from a master station, the response signal (Fig. 3 (b) (1))
The status signal (FIG. 3(b) (2)) is always returned regardless of whether or not the status signal is returned, that is, whether or not there is a status change in the local station.

なお、以上説明した短周期監視動作と長周期監視動作と
は、例えば第６図に示すように、並行して行うことがで
きる。以下、簡単に説明する。Note that the short-period monitoring operation and long-period monitoring operation described above can be performed in parallel, for example, as shown in FIG. 6. A brief explanation will be given below.

親局では、長周期タイマをセットしくステップ６００）
、該当局へ状態要求信号を送信し該当局から状態信号の
収集を行う（ステップ６０１）とともに、短周期タイマ
をセットしくステップ６０２）、該当局へ問い掛け信号
を送信する（ステップ６０３　＞、そして、この問い掛
け信号の送信に対して応答があるか否かを判定しくステ
ップ６０４）、判定結果が肯定（ＹＥＳ＞であれば、該
当局へ状態要求信号を送信して状態信号を収集しくステ
ップ６０５）　、ステップ６０７へ進む、また、判定結
果が否定（ＮＯ）であればステップ６０６→ステツプ６
０４のループで規定時間の経過を待ち、この期間内に応
答信号の受信がなければ同様にステップ６０７へ進む。At the master station, set a long period timer (step 600).
, transmits a status request signal to the relevant station and collects status signals from the relevant station (step 601), sets a short period timer (step 602), transmits an interrogation signal to the relevant station (step 603), and It is determined whether there is a response to the transmission of this interrogation signal (step 604), and if the determination result is affirmative (YES>), a status request signal is transmitted to the corresponding station and the status signal is collected (step 605). , proceed to step 607. If the determination result is negative (NO), proceed to step 606 → step 6.
04 loop, the process waits for a specified time to elapse, and if no response signal is received within this period, the process similarly proceeds to step 607.

ステップ６０７では、長周期の規定時間経過が監視され
、この期間内においてはステップ６０２〜同６０６の短
周期監視動作が繰り返し行われ、状態変化のあった局の
認定等が行われる。また、この期間経過後は先のステッ
プ６００へ戻り、次の該当局についてステップ６０１を
実行し、以上のことを全局について行う。In step 607, the elapse of a specified long-cycle period of time is monitored, and within this period, the short-cycle monitoring operations of steps 602 to 606 are repeated, and a station with a change in status is identified. Further, after this period has elapsed, the process returns to step 600, executes step 601 for the next applicable station, and repeats the above steps for all stations.

一方、子局（中継局）では、自局の状態監視（ステップ
６０８）と並行して次のことを行う。On the other hand, the slave station (relay station) performs the following in parallel with monitoring the status of its own station (step 608).

即ち、ステップ６０９において状態要求信号の受信が判
定されると、状態信号の送信を行う（ステップ６１３）
、これは長周期監視動作に対する応答である。また、ス
テップ６０９において状態要求信号の受信が判定されな
い場合には、ステップ６１０、同６１１の判定を行い、
問い掛け信号を受信し、かつ、自局に状態変化が発生し
たならば、応答を返す（ステップ６１２＞、これに対し
状態要求信号が送信されて来るので（ステップ６０９）
、状態信号を送信する（ステップ６１３）、これは短周
期監視動作に対する応答である。That is, when it is determined in step 609 that the status request signal has been received, the status signal is transmitted (step 613).
, which is a response to a long-period monitoring operation. Furthermore, if it is not determined in step 609 that the status request signal has been received, the determinations in steps 610 and 611 are made;
If the interrogation signal is received and a state change occurs in the local station, a response is returned (step 612>, in response to which a state request signal is sent (step 609)).
, sends a status signal (step 613), which is a response to the short period monitoring operation.

（発明の効果） 以上詳述したように、本発明の無線通信システムによれ
ば、短周期で各局に警報状態の発生等の状態変化があっ
たか否かの問い掛けを行い、長周期で各局に現在の状態
を要求するようにしなので、従来と同様な各局の監視が
できるとともに、短周期における問い掛けには状態変化
が起こった局だけが親局に送信する′ので、無駄な送信
をすることがなくなり、消費電力を低減することが可能
になるという効果がある。(Effects of the Invention) As described in detail above, according to the wireless communication system of the present invention, each station is asked whether there has been a change in status such as the occurrence of an alarm condition in a short period, and each station is asked in a long period whether or not there is a change in the status such as the occurrence of an alarm condition. Since the status of the station is requested, each station can be monitored in the same manner as before, and when questions are asked in short periods, only the station whose status has changed will transmit to the master station, eliminating unnecessary transmissions. , it is possible to reduce power consumption.

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

第１図は本発明の一実施例に係る親局の構成ブロック図
、第２図は本発明の一実施例に係る子局（中継局）の構
成ブロック図、第３図は親局（同図（ａ））および子局
中継局（同図（ｂ））の送信信号フォーマット、第４図
は短周期監視動作のフローチャート、第５図は長周期監
視動作のフローチャート、第６図は長周期と短周期を併
用した場合のフローチャート、第７図は本発明が対象と
する無線通信システムの構成ブロック図、第８図は従来
の監視方式の動作フローチャートである。 ７１・・・・・・親局、　７２・・・・・・中継局、　
７３・・・・・・子局、　１０１．２０１・・・・・・
制御回路、　１０２・・・・・・問い掛け信号送信回路
、　１０３・・・・・・応答信号受信回路、　１０４・
・・・・・状態要求信号送信回路、１０５；・・・・・
状態信号受信回路、　　１０６・・・・・・タイマ回路
、　１０７．２０８・・・・・・共用器、１０８．２０
９・・・・・・受信機、　１０９，２１０・・・・・・
復号器、　１１０．２１２・・・・・・送信機、１１１
．２１１・・・・・・符号器、　１１２，２１３・・・
・・・アンテナ、　２０２・・・・・・問い掛け信号受
信回路、２０３・・・・・・応答信号送信回路、　２０
４・・・・・・状態要求信号送信回路、　２０５・・・
・・・状態信号送信回路、　２０６・・・・・・状態変
化監視回路、　２０７・・・・・・記憶回路。 コ４１ｂ（ヤ籍ぶう）σすａイ１１３丁乙？−マーノト
ネ　／　閃 子局は才輌）の澗威訳 ＃−２区 親局のフローチャート　　　　　　　イ溺寸超局のフロ
ー−％−１−（ａ）　　　　　　　　　　　　　　　　
　（ｂ）促額梁目克フｐ−寺イート ＄５　　口 親局のフローナイート （ａ） 各局ｅ〜１局）のフＵ−チν一ト （ｂ） 姪凰期貧親フυ−寺ヤートFIG. 1 is a block diagram of the configuration of a master station according to an embodiment of the present invention, FIG. 2 is a block diagram of the configuration of a slave station (relay station) according to an embodiment of the present invention, and FIG. Figure (a)) and the transmission signal format of the slave relay station (Figure (b)), Figure 4 is a flowchart of short cycle monitoring operation, Figure 5 is a flowchart of long cycle monitoring operation, Figure 6 is a long cycle FIG. 7 is a block diagram of the configuration of a wireless communication system to which the present invention is applied, and FIG. 8 is an operation flowchart of a conventional monitoring system. 71... Master station, 72... Relay station,
73...Slave station, 101.201...
Control circuit, 102...Interrogation signal transmission circuit, 103...Response signal reception circuit, 104.
... Status request signal transmission circuit, 105; ...
Status signal receiving circuit, 106... Timer circuit, 107.208... Dual unit, 108.20
9...Receiver, 109,210...
Decoder, 110.212...Transmitter, 111
．． 211... Encoder, 112, 213...
...Antenna, 202...Interrogation signal receiving circuit, 203...Response signal transmitting circuit, 20
4... Status request signal transmission circuit, 205...
...Status signal transmission circuit, 206...Status change monitoring circuit, 207...Storage circuit. Ko 41b (Ya registration buu) σsu ai 113-chootsu? - Translated by Kanwei of Mano Tone / Senshi Station is a Talent) # - Flowchart of the 2nd Ward Master Station Flow of the Super Station - % - 1 - (a)
(b) Facilitated frame Liangmekatsufu p-Teraeat $5 Kuchi master station's flow naito (a) Each station e to 1)'s base U-chi ν1to (b) Meieo period poor parent fu υ-Terayato

Claims (1)

【特許請求の範囲】[Claims] 親局と複数の子局、または、親局と複数の子局および１
または複数の中継局とで構成される無線通信システムに
おいて；親局は、短周期で各局に対し問い掛け信号を送
信し応答信号を収集する手段と；前記短周期の問い掛け
信号に対して応答のあった局に対し状態要求信号を送信
し状態信号を収集する手段と；長周期で各局に対し状態
要求信号を送信し状態信号を収集する手段と；を備え、
子局と中継局は、自局の状態変化を監視しその監視結果
を記憶保持する手段と；前記問い掛け信号の受信に対し
自局に状態変化があったときにのみ前記応答信号を返送
する手段と；前記状態要求信号の受信に対し自局の状態
を示す前記状態信号を返送する手段と；を備えているこ
とを特徴とする無線通信システム。A master station and multiple slave stations, or a master station and multiple slave stations and one
Or in a wireless communication system configured with a plurality of relay stations; the master station includes means for transmitting interrogation signals to each station in short cycles and collecting response signals; means for transmitting a status request signal to each station and collecting the status signal; means for transmitting a status request signal to each station in a long cycle and collecting the status signal;
The slave station and the relay station include means for monitoring changes in the status of their own station and storing and retaining the monitoring results; and means for returning the response signal only when there is a change in status of the own station in response to reception of the interrogation signal. A wireless communication system characterized by comprising:; and means for returning the status signal indicating the status of the own station in response to reception of the status request signal.