JP2012004825A - Radio communication system - Google Patents

Radio communication system Download PDF

Info

Publication number
JP2012004825A
JP2012004825A JP2010137618A JP2010137618A JP2012004825A JP 2012004825 A JP2012004825 A JP 2012004825A JP 2010137618 A JP2010137618 A JP 2010137618A JP 2010137618 A JP2010137618 A JP 2010137618A JP 2012004825 A JP2012004825 A JP 2012004825A
Authority
JP
Japan
Prior art keywords
radio
station
transmission
fire
wireless
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.)
Granted
Application number
JP2010137618A
Other languages
Japanese (ja)
Other versions
JP5541975B2 (en
Inventor
Keitaro Hoshiba
圭太郎 干場
Masanori Kurita
昌典 栗田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Panasonic Electric Works Co Ltd
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 Panasonic Electric Works Co Ltd filed Critical Panasonic Electric Works Co Ltd
Priority to JP2010137618A priority Critical patent/JP5541975B2/en
Publication of JP2012004825A publication Critical patent/JP2012004825A/en
Application granted granted Critical
Publication of JP5541975B2 publication Critical patent/JP5541975B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To make delay time, from occurrence of an event to time when all radio stations can receive a radio signal, shorter than before.SOLUTION: Transmission control means (control unit 1) of a radio station (master station TR1 and slave station TRj), at which an event (detection of fire) has occurred, transmits a radio signal in accordance with timing of activation of receiving means, and therefore, all of the other radio terminals (slave stations TRj) can receive the radio signal transmitted by the one radio station (master station TR1 or slave station TRj) almost at the same time. Moreover, because timing when reception control means (control unit 1) of a relay station (master station TR1) activates receiving means (radio transmission and reception unit 2) is made different than timing when reception control means (control unit 1) of the other radio stations (slave stations TRj) activates receiving means (radio transmission and reception unit 2), the maximum delay time to time when the other slave stations TR3 receive a signal after the radio signal transmitted by a slave station TR2 is transmitted to the master station TR1 which then relays the radio signal, can be made shorter than before.

Description

本発明は、複数の無線局からなる無線通信システムに関し、特に各無線局が電池を電源として動作する無線通信システムに関する。   The present invention relates to a radio communication system including a plurality of radio stations, and more particularly to a radio communication system in which each radio station operates using a battery as a power source.

我が国で使用する無線局については、占有周波数帯幅や隣接チャンネル漏洩電力などの使用電波の特性(RF特性)が電波法の規定を満たしていなくてはならない。また、電波法では使用目的ごとに異なる規格(通信規格)が規定されている。例えば、電波法第４条ただし書きにおいて免許を要しない無線局の一つとして規定される「小電力無線局」には、「コードレス電話の無線局」、「特定小電力無線局」、「小電力セキュリティシステム」、「小電力データ通信システムの無線局」などがあり、それぞれの無線局の無線設備について同法施行規則の設備規則によって規格が規定されている。   For radio stations used in Japan, radio wave characteristics (RF characteristics) such as occupied frequency bandwidth and adjacent channel leakage power must satisfy the Radio Law. In the Radio Law, different standards (communication standards) are defined for each purpose of use. For example, “low-power radio stations” defined as one of the radio stations that do not require a license in the proviso to Article 4 of the Radio Law include “wireless stations for cordless telephones”, “specified low-power radio stations”, “low-power radio stations” There are “security system”, “low-power data communication system radio station”, etc., and the standards for the radio equipment of each radio station are stipulated by the equipment regulations of the law.

従来、電池を電源として動作する複数の無線局からなる無線通信システムとして特許文献１に記載されているものがある。特許文献１に記載されている従来システムでは、各無線局が間欠的に受信回路を起動して所望の電波(他の無線局が送信した無線信号)を受信できるか否かをチェックし、当該電波が捉えられなければ直ちに受信回路を停止して待機状態に移行することで平均消費電力を大幅に低減している。   Conventionally, there is one described in Patent Document 1 as a wireless communication system including a plurality of wireless stations that operate using a battery as a power source. In the conventional system described in Patent Document 1, each radio station intermittently activates a reception circuit to check whether or not a desired radio wave (a radio signal transmitted by another radio station) can be received. If radio waves are not captured, the average power consumption is greatly reduced by immediately stopping the receiving circuit and shifting to a standby state.

しかしながら、上述のように間欠受信動作を行うと、本来受信しなければならない無線信号を受信するタイミングが受信回路の間欠受信間隔の分だけ遅延することになる。したがって、消費電力の低減を目的として単純に間欠受信間隔を伸ばすことはできない。また、全ての無線局が相互に無線通信可能な場所に設置されるとは限らない。   However, when the intermittent reception operation is performed as described above, the timing of receiving the radio signal that should be received is delayed by the intermittent reception interval of the reception circuit. Therefore, the intermittent reception interval cannot be simply extended for the purpose of reducing power consumption. In addition, not all wireless stations are installed in a place where they can wirelessly communicate with each other.

これに対して本出願人は、複数の無線局の中から特定の無線局を中継局に設定し、何れかの無線局から送信された無線信号を当該特定の無線局(中継局)が他の無線局へ中継するとともに、同期信号を受信することによって各無線局の受信回路が起動するタイミングを揃え、イベントが発生した無線局が、他の無線局で受信回路を起動するタイミングに合わせて無線信号を送信することにより、一の無線局から送信される無線信号を他の全ての無線局で受信できる無線通信システムを提案している。この無線通信システムにおいては、間欠受信を行うことで消費電力を低減して電池の寿命を延ばしつつ何れかの無線局が送信した無線信号を他の無線局が受信できるまでの遅延時間を短くすることができる。   On the other hand, the present applicant sets a specific radio station as a relay station from among a plurality of radio stations, and the specific radio station (relay station) receives a radio signal transmitted from any one of the radio stations. The timing at which the receiving circuit of each radio station is activated by receiving the synchronization signal is aligned with the timing of starting the receiving circuit at the other radio station. A radio communication system has been proposed in which a radio signal transmitted from one radio station can be received by all other radio stations by transmitting a radio signal. In this wireless communication system, intermittent reception is performed to reduce power consumption and extend battery life, while shortening a delay time until another wireless station can receive a wireless signal transmitted by any wireless station. be able to.

特開２００８−１７６５１５号公報JP 2008-176515 A

しかしながら、本出願人が提案した上記従来例においては、何れかの無線局が、イベントが発生した無線局から送信された無線信号を受信できずに中継局で中継された無線信号を受信した場合、イベントの発生から全ての無線局が無線信号を受信できるまでの遅延時間が最大で間欠受信間隔の２倍になってしまう。   However, in the above-described conventional example proposed by the present applicant, when one of the radio stations receives a radio signal relayed by a relay station without receiving a radio signal transmitted from the radio station where the event occurred The delay time from the occurrence of the event until all the radio stations can receive the radio signal is twice as long as the intermittent reception interval.

本発明は、上記課題に鑑みて為されたものであり、イベントの発生から全ての無線局が無線信号を受信できるまでの遅延時間を従来よりも短くすることを目的とする。   The present invention has been made in view of the above problems, and an object thereof is to shorten the delay time from the occurrence of an event until all wireless stations can receive wireless signals.

本発明の無線通信システムは、複数の無線局からなり、これら複数の無線局間で電波を媒体とする無線信号を送受信する無線通信システムであって、各無線局は、無線信号を送信する送信手段と、無線信号を受信する受信手段と、所定のイベントが発生したときに前記送信手段を起動し、所定の送信期間に前記イベントに対応したメッセージを含む無線信号を送信させるとともに所定の休止期間に無線信号の送信を休止させる動作を交互に繰り返し且つ前記イベントが発生していないときには前記送信手段を停止させる送信制御手段と、一定の間欠受信間隔を繰り返しカウントするタイマ手段と、当該タイマ手段による間欠受信間隔のカウント中は前記受信手段を停止させ、前記タイマ手段による間欠受信間隔のカウントが完了する度に前記受信手段を起動する受信制御手段と、電池を電源として各手段の動作電源を供給する給電手段とを備え、前記受信制御手段は、前記受信手段で同期信号を受信した場合に前記タイマ手段による間欠受信間隔のカウントを中止させるとともに、当該同期信号の終了時点から一定の待機時間が経過した時点で前記タイマ手段による間欠受信間隔のカウントを再開させ、前記送信制御手段は、前記イベントが発生した場合、前記タイマ手段による間欠受信間隔のカウントが完了する時点と重なる前記送信期間に前記送信手段から無線信号を送信させ、前記複数の無線局のうちの少なくとも１つの無線局の前記送信制御手段は、前記メッセージを含む無線信号を受信した場合に当該メッセージを含む無線信号を前記送信期間に前記送信手段から他の無線局へ中継してなり、当該中継を行う無線局の前記受信制御手段は、他の中継を行わない無線局の前記受信制御手段における前記待機時間と異なる待機時間を有することを特徴とする。   The wireless communication system of the present invention is a wireless communication system that includes a plurality of wireless stations and transmits and receives wireless signals using radio waves as a medium between the plurality of wireless stations, and each wireless station transmits a wireless signal. Means, receiving means for receiving a radio signal, and starting the transmitting means when a predetermined event occurs, transmitting a radio signal including a message corresponding to the event in a predetermined transmission period, and a predetermined pause period A transmission control means for stopping the transmission means when the event does not occur, a timer means for repeatedly counting a certain intermittent reception interval, and a timer means During the counting of the intermittent reception interval, the reception unit is stopped, and the counting of the intermittent reception interval by the timer unit is completed each time. A reception control means for activating the communication means; and a power supply means for supplying an operating power for each means using a battery as a power supply. The reception control means is intermittent by the timer means when receiving the synchronization signal by the reception means. When the counting of the reception interval is stopped, the counting of the intermittent reception interval by the timer unit is restarted when a certain waiting time has elapsed from the end of the synchronization signal, and the transmission control unit , Causing the transmission means to transmit a radio signal during the transmission period overlapping with the time point at which the intermittent reception interval count by the timer means is completed, and the transmission control means of at least one radio station of the plurality of radio stations, When a wireless signal including the message is received, the wireless signal including the message is transmitted from the transmitting unit to the other device during the transmission period. Will be relayed to the station, the reception control means of the radio station performing the relay is characterized by having a standby time different from the waiting time in the reception control means of the radio station that does not perform other relay.

この無線通信システムにおいて、前記中継を行わない無線局の前記送信制御手段は、他の中継を行わない無線局において前記間欠受信間隔のカウントが完了する時点と、前記中継を行う無線局において前記間欠受信間隔のカウントが完了する時点とのうちで早い方の時点に前記無線信号を前記送信手段から送信させることが好ましい。   In this wireless communication system, the transmission control means of the wireless station that does not perform the relay is configured such that the intermittent reception interval count is completed in the wireless station that does not perform the relay and the intermittent operation is performed in the wireless station that performs the relay. It is preferable to transmit the radio signal from the transmission means at an earlier time point from when the reception interval count is completed.

この無線通信システムにおいて、前記中継を行う無線局の前記送信制御手段は、前記メッセージを含む無線信号を受信した場合に当該メッセージを含む無線信号を、他の中継を行わない無線局において前記間欠受信間隔のカウントが完了する時点に前記送信手段から送信させることが好ましい。   In this wireless communication system, the transmission control means of the wireless station that performs the relay receives the wireless signal that includes the message when the wireless signal that includes the message is received by the wireless station that does not perform the relay. It is preferable to transmit from the transmission means when the interval count is completed.

この無線通信システムにおいて、前記中継を行う無線局における前記待機時間と前記中継を行わない無線局における前記待機時間との時間差は、前記送信期間と前記休止期間の合計期間よりも短くない時間であることが好ましい。   In this wireless communication system, the time difference between the standby time in the wireless station that performs the relay and the standby time in the wireless station that does not perform the relay is a time that is not shorter than the total period of the transmission period and the pause period. It is preferable.

この無線通信システムにおいて、複数の前記無線局のうちの何れか１つの無線局の前記送信制御手段は、前記同期信号を前記送信手段から送信させることが好ましい。   In this radio communication system, it is preferable that the transmission control means of any one of the plurality of radio stations transmit the synchronization signal from the transmission means.

この無線通信システムにおいて、複数の前記無線局の前記送信制御手段は、各無線局毎に決められた順番で前記同期信号を前記送信手段から送信させることが好ましい。   In this radio communication system, it is preferable that the transmission control means of the plurality of radio stations transmit the synchronization signal from the transmission means in an order determined for each radio station.

この無線通信システムにおいて、各無線局の前記送信制御手段は、前記同期信号を受信したときに応答メッセージを含む無線信号を前記送信手段から送信させ、前記同期信号を送信する無線局は、前記受信手段で前記応答メッセージを含む無線信号を受信するか否かによって他の無線局が正常に動作しているか否かを判断する判断手段を備えることが好ましい。   In this wireless communication system, the transmission control means of each wireless station causes the transmission means to transmit a wireless signal including a response message when the synchronization signal is received, and the wireless station that transmits the synchronization signal receives the reception signal. It is preferable to include a determination unit that determines whether another radio station is operating normally depending on whether the unit receives a radio signal including the response message.

この無線通信システムにおいて、前記各無線局の前記送信制御手段は、前記イベントに対応したメッセージを含む無線信号を受信したときに前記同期信号を受信したときと共通の処理を実行することが好ましい。   In this radio communication system, it is preferable that the transmission control unit of each radio station executes a process common to the case where the synchronization signal is received when the radio signal including the message corresponding to the event is received.

この無線通信システムにおいて、前記同期信号を送信する送信局を有することが好ましい。   In this wireless communication system, it is preferable to have a transmitting station that transmits the synchronization signal.

この無線通信システムにおいて、前記無線局は、火災を感知する火災感知手段と、火災感知手段で火災が感知されたときに警報音を鳴動する火災警報手段とを備え、送信制御手段は、火災感知手段で火災が感知されたときに火災警報メッセージを含む無線信号を送信手段より送信させ、受信制御手段は、受信手段で受信した無線信号に火災警報メッセージが含まれている場合に火災警報手段に警報音を鳴動させることが好ましい。   In this wireless communication system, the wireless station includes fire detection means for detecting a fire and fire alarm means for sounding an alarm sound when a fire is detected by the fire detection means, and the transmission control means is configured to detect fire. When a fire is detected by the means, a radio signal including a fire alarm message is transmitted from the transmission means, and the reception control means is a fire alarm means when the radio signal received by the reception means is included in the fire alarm message. It is preferable to sound an alarm sound.

本発明の無線通信システムは、イベントの発生から全ての無線局が無線信号を受信できるまでの遅延時間を従来よりも短くすることができるという効果がある。   The wireless communication system of the present invention has an effect that the delay time from the occurrence of an event until all wireless stations can receive wireless signals can be made shorter than before.

本発明の実施形態における火災警報器（無線局）のブロック図である。It is a block diagram of a fire alarm (radio station) in an embodiment of the present invention. 同上における無線信号のフレームフォーマットである。It is a frame format of the radio signal in the same as above. 同上の待機状態から火災連動状態へ遷移する動作を説明するためのフローチャートである。It is a flowchart for demonstrating the operation | movement which changes to a fire interlocking state from a standby state same as the above. 同上の連動鳴動状態から連動停止状態へ遷移する動作を説明するためのタイムチャートである。It is a time chart for demonstrating the operation | movement which changes to the interlocking stop state from the interlocking ringing state same as the above. 同上の連動鳴動状態から連動停止状態へ遷移する動作を説明するためのタイムチャートである。It is a time chart for demonstrating the operation | movement which changes to the interlocking stop state from the interlocking ringing state same as the above. 同上の火災連動状態から待機状態へ遷移する動作を説明するためのタイムチャートである。It is a time chart for demonstrating the operation | movement which changes to a standby state from a fire interlocking state same as the above. 同上の火災連動状態における動作を説明するためのタイムチャートである。It is a time chart for demonstrating the operation | movement in a fire interlocking state same as the above. (ａ),(ｂ)は同上の待機状態から火災連動状態へ遷移する動作を説明するためのタイムチャートである。(a), (b) is a time chart for demonstrating the operation | movement which changes to a fire interlocking state from the standby state same as the above. 同上における間欠受信間隔の説明図である。It is explanatory drawing of the intermittent reception interval in the same as the above.

以下、火災を感知して警報音を鳴動するとともに電波を媒体とし且つ火災感知メッセージを含む無線信号を送信する火災警報器を無線局とした無線通信システム(火災警報システム)に本発明の技術思想を適用した実施形態について説明する。   Hereinafter, the technical idea of the present invention to a radio communication system (fire alarm system) using a fire alarm device as a radio station, which detects a fire and sounds an alarm sound and transmits a radio signal including a fire detection message using a radio wave as a medium. An embodiment to which is applied will be described.

図１は本実施形態のシステム構成図であり、複数台(図示は３台のみ)の火災警報器TRで火災警報システムが構成されている。なお、以下の説明では、火災警報器TRを個別に示す場合は火災警報器TR1,TR2,…,TRnと表記し、総括して示す場合は火災警報器TRと表記する。   FIG. 1 is a system configuration diagram of this embodiment, and a fire alarm system is configured by a plurality of (only three in the figure) fire alarms TR. In the following description, when the fire alarms TR are individually indicated, they are indicated as fire alarms TR1, TR2,..., TRn, and when collectively indicated, they are indicated as fire alarms TR.

火災警報器TRは、アンテナ３から電波を媒体とした無線信号を送信するとともに他の火災警報器TRが送信した無線信号をアンテナ３で受信する無線送受信部２と、音(ブザー音や音声メッセージなど)による火災警報(以下、「警報音」と呼ぶ。)を報知(スピーカから鳴動)する警報部５と、マイコンや書換可能な不揮発性の半導体メモリなどからなるメモリ部1aを主構成要素とし火災感知部４で火災を感知したときに警報部５に警報音を鳴動させるとともに他の火災警報器TRに対して火災警報を報知させるための火災警報メッセージを含む無線信号を無線送受信部２より送信させる制御部１と、後述するように警報音の鳴動を停止するための操作入力などを受け付ける操作入力受付部６と、乾電池等の電池を電源として各部に動作電源を供給する電池電源部７とを具備している。操作入力受付部６は１乃至複数のスイッチ(例えば、押釦スイッチ)を有しており、スイッチが操作されることで各スイッチに対応した操作入力を受け付けるとともに当該操作入力に対応した操作信号を制御部１に出力する。なお、各火災警報器TRi(i=1,2,…,n)には固有の識別符号が割り当てられてメモリ部1aに格納されており、当該識別符号によって無線信号の宛先並びに送信元の火災警報器TRiが特定できる。   The fire alarm TR transmits a radio signal using radio waves as a medium from the antenna 3 and receives a radio signal transmitted from another fire alarm TR via the antenna 3 and a sound (buzzer sound or voice message). The main component is an alarm unit 5 for notifying (sounding from a speaker) a fire alarm (hereinafter referred to as “alarm sound”) and a memory unit 1a including a microcomputer and a rewritable nonvolatile semiconductor memory. When the fire detection unit 4 detects a fire, the radio transmission / reception unit 2 transmits a radio signal including a fire alarm message for causing the alarm unit 5 to sound an alarm sound and for other fire alarms TR to notify the fire alarm. A control unit 1 for transmission, an operation input receiving unit 6 for receiving an operation input for stopping the alarm sound as will be described later, and a power source for supplying operating power to each unit using a battery such as a dry battery as a power source. And it includes a power supply unit 7. The operation input receiving unit 6 has one or more switches (for example, push button switches). When the switch is operated, an operation input corresponding to each switch is received and an operation signal corresponding to the operation input is controlled. Output to part 1. Each fire alarm device TRi (i = 1, 2,..., N) is assigned a unique identification code and stored in the memory unit 1a. Alarm TRi can be specified.

無線送受信部２は、電波法施行規則第６条第４項第３号に規定される「小電力セキュリティシステムの無線局」に準拠して電波を媒体とする無線信号を送受信するものである。また火災感知部４は、例えば、火災に伴って発生する煙や熱、炎などを検出することで火災を感知するものである。但し、無線送受信部２並びに火災感知部４の詳細な構成については、従来周知であるから詳細な説明は省略する。   The radio transmission / reception unit 2 transmits / receives a radio signal using radio waves as a medium in accordance with “radio station of low power security system” defined in Article 6, Paragraph 4, Item 3 of the Radio Law Enforcement Regulations. In addition, the fire detection unit 4 detects fire by detecting smoke, heat, flames, and the like generated with the fire, for example. However, detailed configurations of the wireless transmission / reception unit 2 and the fire detection unit 4 are well known in the art and will not be described in detail.

制御部１は、図示しないメモリ(ROMあるいはEEPROMなど)に格納されたプログラムをマイコンで実行することによって後述する各種の機能を実現している。火災感知部４で火災の発生が感知されると、制御部１は警報部５が備えるブザーを駆動して警報音を鳴動させたり、あるいは予めメモリ(あるいはメモリ部1a)に格納されている警報用の音声メッセージ(例えば、「火事です」など)をスピーカに鳴動させることで火災警報を報知するとともに、他の火災警報器TRにおいても火災警報を報知させるため、火災警報メッセージを含む無線信号を無線送受信部２より送信させる。また、他の火災警報器TRから送信された無線信号を無線送受信部２で受信することにより火災警報メッセージを受け取ったときも、制御部１が警報部５を制御して警報音を鳴動させる。つまり、制御部１では火災感知部４が火災を感知したときに警報部５から警報音を鳴動させて火災警報を報知するとともに火災警報メッセージを含む無線信号を無線送受信部２より送信させる機能を有している。   The control unit 1 realizes various functions described later by executing a program stored in a memory (ROM or EEPROM) (not shown) by a microcomputer. When the fire detection unit 4 detects the occurrence of a fire, the control unit 1 drives a buzzer included in the alarm unit 5 to sound an alarm sound, or an alarm stored in the memory (or the memory unit 1a) in advance. In order to notify a fire alarm by sounding a voice message (for example, `` It is a fire '') on the speaker, and also to notify the fire alarm in other fire alarms TR, a radio signal including a fire alarm message is sent. The wireless transmission / reception unit 2 transmits the data. Also, when the wireless transmission / reception unit 2 receives a wireless signal transmitted from another fire alarm device TR, the control unit 1 controls the alarm unit 5 to sound an alarm sound. That is, in the control unit 1, when the fire detection unit 4 detects a fire, the alarm unit 5 sounds an alarm sound to notify the fire alarm, and the wireless transmission / reception unit 2 transmits a radio signal including the fire alarm message. Have.

ここで、電波法施行規則の無線設備規則第４９条の１７「小電力セキュリティシステムの無線局の無線設備」では、無線信号を連続して送信してもよい期間(送信期間)が３秒以下、送信期間と送信期間の間に設けられた、無線信号を送信してはいけない期間(休止期間)が２秒以上とすることが規定されている(同条第５号参照)。このために本実施形態における制御部１では、上記無線設備規則に適合する送信期間に無線信号を送信させるとともに休止期間に送信を停止し且つ受信可能な状態としている。   Here, according to Article 49-17 of the Radio Equipment Regulations of the Radio Law Enforcement Regulations, “the radio equipment of the radio station of the low-power security system”, the period during which radio signals may be continuously transmitted (transmission period) is 3 seconds or less. In addition, it is stipulated that a period during which a radio signal should not be transmitted (pause period) provided between the transmission period and the transmission period is 2 seconds or more (see No. 5 of the same article). For this reason, in the control unit 1 in the present embodiment, the wireless signal is transmitted during the transmission period that complies with the wireless facility rules, and the transmission is stopped and received during the suspension period.

また電池電源部７の電池寿命をできるだけ長くするため、制御部１ではマイコンに内蔵するタイマ(タイマ手段)で所定の間欠受信間隔(但し、間欠受信間隔は前記送信期間よりも長い時間とする)を繰り返しカウントするとともに間欠受信間隔のカウントが完了する毎に無線送受信部２を起動して所望の電波(他の火災警報器TRが送信した無線信号)が受信できるか否かをチェックし、当該電波が捉えられなければ直ちに無線送受信部２を停止して待機状態に移行させることで平均消費電力を大幅に低減している。なお、電波の受信チェックは、無線送受信部２から出力される、受信信号強度の大小に比例した直流電圧信号である受信信号強度表示信号(Receiving Signal Strength Indication:RSSI信号)に基づいて制御部１が行っており、詳細については従来周知であるから省略する。   In order to extend the battery life of the battery power supply unit 7 as much as possible, the control unit 1 uses a timer (timer means) built in the microcomputer to set a predetermined intermittent reception interval (however, the intermittent reception interval is longer than the transmission period). Is repeatedly counted, and every time the intermittent reception interval is counted, the wireless transmitter / receiver 2 is activated to check whether or not a desired radio wave (radio signal transmitted by another fire alarm TR) can be received. If radio waves are not captured, the average power consumption is greatly reduced by immediately stopping the wireless transmission / reception unit 2 and shifting to the standby state. The radio wave reception check is performed based on a received signal strength indication signal (RSSI signal) that is a DC voltage signal output from the wireless transmission / reception unit 2 and proportional to the magnitude of the received signal strength. The details are well known in the art and will be omitted.

さらに特定の火災警報器TR1(以下、親局と呼ぶ。)の制御部１では、定期的(例えば、２４時間毎)に無線送受信部２を起動して他の火災警報器TR2,TR3,…(以下、子局と呼ぶ。)が正常に動作しているか否かの確認(定期監視)を行うために定期監視メッセージを含む無線信号を送信させる。子局TRj(j=2,3,…,n)においては、制御部１が火災感知部４の故障の有無及び電池電源部７の電池切れの有無を一定周期で(例えば、１時間毎に)監視するとともに、その監視結果(故障の有無及び電池切れの有無)をメモリ部1aに記憶しており、親局TR1から定期監視メッセージを受け取ったときに、メモリ部1aに記憶している監視結果を通知するための通知メッセージを含む無線信号を親局TR1に返信する。親局TR1の制御部１は、通知メッセージを含む無線信号を送信した後、無線送受信部２を受信状態に切り換えて各子局TRjから送信される無線信号を受信し、定期監視メッセージを含む無線信号を送信してから所定時間内に通知メッセージを含む無線信号を送信してこない子局TRjがあったり、あるいは、何れかの子局TRjが送信してきた通知メッセージが故障有り若しくは電池切れ有りの監視結果を通知するものである場合に、警報部５が備えるブザーを駆動して報知音を鳴動させるなどして子局TRjに異常(通信不可や故障有り、電池切れなど)が発生したことを知らせる機能も有している。なお、親局TR1及び子局TRjの制御部１は、故障若しくは電池切れが生じていると判断した場合、直ちに警報部５から異常(故障若しくは電池切れ)の発生を知らせるための警告音(ブザー音や音声メッセージなど)を警報部５のスピーカから鳴動させるようになっている。   Further, the control unit 1 of a specific fire alarm device TR1 (hereinafter referred to as a master station) activates the wireless transmission / reception unit 2 periodically (for example, every 24 hours) to establish other fire alarm devices TR2, TR3,. A radio signal including a periodic monitoring message is transmitted in order to confirm (periodic monitoring) whether or not (hereinafter referred to as a slave station) is operating normally. In the slave station TRj (j = 2, 3,..., N), the control unit 1 determines whether or not the fire detection unit 4 has failed and whether or not the battery power supply unit 7 has run out of battery at regular intervals (for example, every hour). ) Monitoring and storing the monitoring results (whether there is a failure and whether the battery has run out) in the memory unit 1a, and when the periodic monitoring message is received from the master station TR1, the monitoring stored in the memory unit 1a A radio signal including a notification message for notifying the result is returned to the master station TR1. After transmitting the radio signal including the notification message, the control unit 1 of the master station TR1 switches the radio transmission / reception unit 2 to the reception state, receives the radio signal transmitted from each slave station TRj, and includes the radio signal including the periodic monitoring message. There is a slave station TRj that does not transmit a radio signal including a notification message within a predetermined time after transmitting the signal, or the notification message transmitted by any of the slave stations TRj is faulty or the battery is dead A function to notify the slave station TRj that an abnormality (communication is disabled, there is a failure, the battery is dead, etc.) is generated by driving a buzzer provided in the alarm unit 5 and sounding a notification sound. Also have. When the control unit 1 of the master station TR1 and the slave station TRj determines that a failure or a battery has run out, a warning sound (buzzer) is immediately sent from the alarm unit 5 to notify the occurrence of an abnormality (failure or battery run-out). Sound or voice message) is emitted from the speaker of the alarm unit 5.

また親局TR1の制御部１は、火災感知部４が火災を感知して警報部５から警報音を鳴動させるとともに各子局TRjに火災警報メッセージを送信した後、若しくは何れかの子局TRjから火災警報メッセージを受信した後においては、無線送信部２に一定周期で同期ビーコンを送信させる。この同期ビーコンは、複数の火災警報器TR同士でＴＤＭＡ(時分割多元接続)方式の無線通信(以下、「同期通信」と呼ぶ。)を行うために必要なタイムスロットを規定する信号であって、その１周期(サイクル)が複数のタイムスロットに分割され、全ての子局TRjにそれぞれ互いに異なるタイムスロットが１つずつ割り当てられる。そして、親局TR1から子局TRjへのメッセージは同期ビーコンに含めて送信され、子局TRjから親局TR1へのメッセージを含む無線信号は、各子局TRjに割り当てられているタイムスロットに格納されて送信される。故に、複数台の火災警報器TR(親局TR1並びに子局TRj)から送信される無線信号の衝突を確実に回避することができる。なお、各火災警報器TRに対するタイムスロットの割当は固定であってもよいが、親局TR1から送信する同期ビーコンによってタイムスロットの割当情報を各子局TRjに通知しても構わない。   In addition, the control unit 1 of the master station TR1 detects that the fire detection unit 4 has detected a fire and causes the alarm unit 5 to sound an alarm sound and transmits a fire alarm message to each slave station TRj, or fires from any slave station TRj. After receiving the alarm message, the wireless transmission unit 2 is caused to transmit a synchronous beacon at a constant period. This synchronous beacon is a signal that defines a time slot necessary for performing TDMA (time division multiple access) wireless communication (hereinafter referred to as “synchronous communication”) between a plurality of fire alarms TR. The one period (cycle) is divided into a plurality of time slots, and one different time slot is assigned to each of the slave stations TRj. The message from the master station TR1 to the slave station TRj is transmitted in the synchronization beacon, and the radio signal containing the message from the slave station TRj to the master station TR1 is stored in the time slot assigned to each slave station TRj. To be sent. Therefore, collision of radio signals transmitted from a plurality of fire alarm devices TR (master station TR1 and slave station TRj) can be reliably avoided. The time slot assignment for each fire alarm device TR may be fixed, but the time slot assignment information may be notified to each slave station TRj by a synchronous beacon transmitted from the master station TR1.

図２は火災警報器TRが送受信する無線信号のフレームフォーマットを示しており、同期ビット(プリアンブル：ＰＡ)、フレーム同期パターン(ユニークワード：ＵＷ)、宛先アドレスＤＡ、送信元アドレスＳＡ、メッセージＭ、ＣＲＣ符号で１フレームが構成されている。ここで、宛先アドレスＤＡとして各火災警報器TRの識別符号を設定すれば当該識別符号の火災警報器TRのみが無線信号を受信してメッセージを取得することになるが、宛先アドレスＤＡとして何れの火災警報器TRにも割り当てられていない特殊なビット列(例えば、すべてのビットを１としたビット列)を設定することで無線信号を同報(マルチキャスト)して全ての火災警報器TRにメッセージを取得させることができる。例えば、火災警報メッセージを含む無線信号が親局TR1から全ての子局TRjに同報される。   FIG. 2 shows a frame format of a radio signal transmitted and received by the fire alarm device TR. The synchronization bit (preamble: PA), the frame synchronization pattern (unique word: UW), the destination address DA, the source address SA, the message M, One frame is composed of a CRC code. Here, if the identification code of each fire alarm device TR is set as the destination address DA, only the fire alarm device TR of the identification code receives a radio signal and acquires a message. By setting a special bit string that is not assigned to the fire alarm TR (for example, a bit string with all bits set to 1), a wireless signal is broadcast (multicast) and a message is acquired for all the fire alarm TRs. Can be made. For example, a radio signal including a fire alarm message is broadcast from the master station TR1 to all the slave stations TRj.

次に、図３のタイムチャートを参照して、火災感知の前後における本実施形態の送受信動作を説明する。   Next, the transmission / reception operation of this embodiment before and after the fire detection will be described with reference to the time chart of FIG.

ここで、各火災警報器TR(親局TR1並びに子局TRj)が動作を開始する(タイマが間欠受信間隔のカウントを開始する)タイミングは通常一致しないので、制御部１が無線送受信部２を起動して電波を受信するタイミング(図３における下向きの矢印参照)も不揃いとなる。これに対して本実施形態では、各火災警報器TR(親局TR1並びに子局TRj)の無線送受信部２で同期信号が受信されると、制御部１がタイマによる間欠受信間隔Txのカウントを中止させる。そして、子局TRjの制御部１は、同期信号の終了時点(t=t0)から一定の待機時間Tw1,Tw2(Tw1≠Tw2)が経過した時点でそれぞれ別のタイマによる間欠受信間隔Tx1,Tx2のカウントを再開させる。したがって、同期信号を受信した後は、各火災警報器TR(子局TRj)においてタイマが間欠受信間隔Tx2のカウントを完了するタイミングが揃うことになる。一方、親局TR1の制御部１は、同期信号の終了時点(t=t0)から一定の待機時間Tw1,Tw2が経過した時点でそれぞれ別のタイマによる間欠受信間隔Tx1,Tx2のカウントを再開させる。その結果、子局TRj同士では間欠受信間隔Tx2のカウントを開始するタイミングが揃うが、親局TR1と子局TRjとでは、間欠受信間隔Tx1,Tx2のカウントを開始するタイミングが異なることになる。なお、同期信号は専用の送信局(図示せず)から送信するようにしてもよいし、後述するように火災警報器TRから送信しても構わない。専用の送信局から同期信号を送信した場合、火災警報器TRから同期信号を送信する場合と比較して火災警報器TRにおける電池の消耗を低減できるという利点がある。   Here, since each fire alarm device TR (the master station TR1 and the slave station TRj) starts to operate (the timer starts counting the intermittent reception interval) usually does not coincide, the control unit 1 causes the wireless transmission / reception unit 2 to operate. The timing of activation and reception of radio waves (see the downward arrow in FIG. 3) is also uneven. In contrast, in this embodiment, when the synchronization signal is received by the wireless transmission / reception unit 2 of each fire alarm device TR (the master station TR1 and the slave station TRj), the control unit 1 counts the intermittent reception interval Tx by the timer. Stop it. Then, the control unit 1 of the slave station TRj, when a certain waiting time Tw1, Tw2 (Tw1 ≠ Tw2) has elapsed from the end of the synchronization signal (t = t0), the intermittent reception intervals Tx1, Tx2 by different timers, respectively. Resume counting. Therefore, after receiving the synchronization signal, the timings at which the timer completes the intermittent reception interval Tx2 in each fire alarm device TR (slave station TRj) are aligned. On the other hand, the control unit 1 of the master station TR1 restarts the counting of the intermittent reception intervals Tx1 and Tx2 by different timers when a certain waiting time Tw1 and Tw2 has elapsed from the end of the synchronization signal (t = t0). . As a result, the slave stations TRj have the same timing to start counting the intermittent reception interval Tx2, but the master station TR1 and the slave station TRj have different timings to start counting the intermittent reception intervals Tx1 and Tx2. The synchronization signal may be transmitted from a dedicated transmission station (not shown), or may be transmitted from the fire alarm device TR as will be described later. When the synchronization signal is transmitted from the dedicated transmission station, there is an advantage that battery consumption in the fire alarm device TR can be reduced as compared with the case where the synchronization signal is transmitted from the fire alarm device TR.

例えば、子局TR2において火災感知部４が火災を感知すると、子局TR2の制御部１は警報部５より警報音を鳴動させるとともに、タイマによる間欠受信間隔Tx2のカウント完了前に無線送受信部２を起動する。そして、タイマによる間欠受信間隔Tx1のカウント完了のタイミングが、タイマによる間欠受信間隔Tx2のカウント完了のタイミングよりも早ければ、子局TR2の制御部１は間欠受信間隔Tx1のカウント完了時点を含む送信期間内に火災警報メッセージを含む無線信号を親局TR1に宛てて送信する。   For example, when the fire detection unit 4 detects a fire in the slave station TR2, the control unit 1 of the slave station TR2 sounds an alarm sound from the alarm unit 5, and before the count of the intermittent reception interval Tx2 by the timer is completed, the radio transmission / reception unit 2 Start up. If the timing of completion of counting of the intermittent reception interval Tx1 by the timer is earlier than the timing of completion of counting of the intermittent reception interval Tx2 by the timer, the control unit 1 of the slave station TR2 performs transmission including the time point of completion of counting of the intermittent reception interval Tx1. A radio signal including a fire alarm message is transmitted to the master station TR1 within the period.

一方、タイマによる間欠受信間隔Tx1のカウント完了のタイミングが、タイマによる間欠受信間隔Tx2のカウント完了のタイミングよりも遅ければ、子局TR2の制御部１は、先に間欠受信間隔Tx2のカウント完了時点を含む送信期間内に火災警報メッセージを含む無線信号を他の全ての子局TR3,TR4,…に宛てて送信し、後から間欠受信間隔Tx1のカウント完了時点を含む送信期間内に火災警報メッセージを含む無線信号を親局TR1に宛てて送信する。この際、送信元の子局TR2の制御部１は、送信期間内で送信可能なフレーム数だけ無線信号を連続して送信し、送信期間後の休止期間(受信期間)には無線送受信部２を受信状態に切り換える。なお、子局TR2と親局TR1において間欠受信間隔Tx1のカウントが完了するタイミングが揃っているので、親局TR1は１回の送信期間で火災警報メッセージを含む無線信号を受信することができる。   On the other hand, if the count completion timing of the intermittent reception interval Tx1 by the timer is later than the timing completion of the intermittent reception interval Tx2 by the timer, the control unit 1 of the slave station TR2 first counts the intermittent reception interval Tx2 A radio signal including a fire warning message is transmitted to all other slave stations TR3, TR4, ... within a transmission period including the time, and a fire alarm message is transmitted within a transmission period including the time when counting of the intermittent reception interval Tx1 is completed later. Is transmitted to the master station TR1. At this time, the control unit 1 of the transmission source slave station TR2 continuously transmits the radio signal by the number of frames that can be transmitted within the transmission period, and the radio transmission / reception unit 2 during the idle period (reception period) after the transmission period. To the receiving state. Since the slave station TR2 and the master station TR1 have the same timing for completing the intermittent reception interval Tx1, the master station TR1 can receive a radio signal including a fire alarm message in one transmission period.

ここで、小電力無線を利用すれば、無線通信距離としては通常の住宅ひとつのエリア内であれば十分カバーできるので、火災元の子局TR2が、他の火災警報器TR(親局TR1及び他の子局TR3,…)に対しメッセージを送信することは通常は十分可能である。しかしながら、上述したように親局TR1は各子局TR2〜TR4に対して定期監視を行っており、親局TR1と各子局TR2〜TR4との間では通信パスの正常性が確認されているが、子局TR2〜TR4間の通信パスは確認されていないため、例えば障害物などの影響によって、ある子局にはメッセージが届いていない可能性もある。   Here, if low-power radio is used, the wireless communication distance can be sufficiently covered within one area of a normal house, so that the fire source child station TR2 is connected to another fire alarm TR (master station TR1 and It is usually possible to send a message to other slave stations TR3,. However, as described above, the master station TR1 regularly monitors the slave stations TR2 to TR4, and the normality of the communication path is confirmed between the master station TR1 and each of the slave stations TR2 to TR4. However, since the communication path between the slave stations TR2 to TR4 is not confirmed, there is a possibility that a message does not reach a certain slave station due to the influence of an obstacle, for example.

そこで、火災警報メッセージを受信した親局TR1の制御部１は、送信元の子局TR2を除く他の子局TR3,TR4に対して火災警報メッセージを含む無線信号を、タイマによる間欠受信間隔Tx2のカウント完了時点を含む送信期間に送信(中継)する。他の子局TR3,TR4の制御部１では、子局TR2又は親局TR1から送信された火災警報メッセージを受け取ると直ちに警報部５より警報音を鳴動させるとともに無線送受信部２より火災警報メッセージの受信を確認する応答メッセージ(ACK)を無線信号によって返信する。なお、このように少なくとも１台の火災警報器TRで火災が感知されることで全ての火災警報器TRが火災警報を報知(警報音を鳴動)することを、以下では「火災連動」と呼ぶ。   Therefore, the control unit 1 of the master station TR1 that has received the fire alarm message sends a radio signal including the fire alarm message to the other slave stations TR3 and TR4 other than the source slave station TR2, and an intermittent reception interval Tx2 by the timer. Transmit (relay) during the transmission period including the count completion point. When the control unit 1 of the other slave stations TR3 and TR4 receives the fire alarm message transmitted from the slave station TR2 or the master station TR1, it immediately sounds an alarm sound from the alarm unit 5 and transmits a fire alarm message from the radio transceiver unit 2. A response message (ACK) for confirming reception is returned by a radio signal. In addition, when all the fire alarms TR notify the fire alarm (sound an alarm sound) when a fire is detected by at least one fire alarm TR in this way, it is hereinafter referred to as “fire interlocking”. .

親局TR1の制御部１は、他の全ての子局TR3,TR4からACKを受け取れば、タイムスロットを規定するための同期ビーコンを一定の周期で無線送受信部２から送信させる。なお、本実施形態では先頭のタイムスロットTS1を子局TR2に、２番目のタイムスロットTS2を子局TR3に、３番目のタイムスロットTS3を子局TR4にそれぞれ割り当てている。   When the control unit 1 of the master station TR1 receives ACKs from all the other slave stations TR3 and TR4, the control unit 1 transmits a synchronization beacon for defining a time slot from the radio transmission / reception unit 2 at a constant period. In the present embodiment, the first time slot TS1 is assigned to the child station TR2, the second time slot TS2 is assigned to the child station TR3, and the third time slot TS3 is assigned to the child station TR4.

ここで、親局TR1は各子局TR2〜TR4に対して定期監視を行っており、親局TR1と各子局TR2〜TR4との間では通信パスの正常性が確認されているが、子局TR2〜TR4間の通信パスは確認されていない。したがって、子局TRjが多数配置された場合、子局TRj間の通信パスの数は非常に多くなる為、子局TRj間の通信パスの正常性の確認を行うと電池消耗が激しくなるので、上述のように特定の火災警報器TR1を親局(中継局)とし、その他の火災警報器TRjを子局(中継される局)として親局TR1から各子局TRjに火災警報メッセージやその他のメッセージ(後述する)を中継することで相互に通信パスが確立できない子局が存在する場合でも確実に火災連動させることができるものである。   Here, the master station TR1 regularly monitors each of the slave stations TR2 to TR4, and the normality of the communication path is confirmed between the master station TR1 and each of the slave stations TR2 to TR4. The communication path between the stations TR2 to TR4 has not been confirmed. Therefore, when a large number of slave stations TRj are arranged, the number of communication paths between the slave stations TRj becomes very large, so if the normality of the communication paths between the slave stations TRj is confirmed, battery consumption becomes intense. As described above, a specific fire alarm TR1 is used as a master station (relay station), and other fire alarms TRj are used as slave stations (relayed stations) from the master station TR1 to each slave station TRj. By relaying messages (to be described later), even when there are slave stations that cannot establish a communication path with each other, it is possible to reliably link them with fire.

また、全ての火災警報器TRが警報音を鳴動することにより連動が開始されると、上述のように親局TR1から一定周期で同期ビーコンが送信されてTDMA方式の同期通信に移行するのであるが、親局TR1の制御部１では、同期ビーコンに含めることで火災警報メッセージを一定周期で全ての子局TRjに繰り返し送信している。そして、各子局TRjの制御部１では、親局TR1から送信される火災警報メッセージを受け取る度に警報部５の状態を確認し、仮に警報部５が停止していたとしたら警報部５に再度警報音を鳴動させる。したがって、全ての火災警報器TRで火災警報が報知され始めてからは特定の火災警報器(親局)TR1が送信する同期ビーコンによって規定される複数のタイムスロットに他の全ての火災警報器(子局)TRjを割り当てて時分割多元接続(TDMA)による無線通信を行うことで衝突を回避することができ、さらに、特定の火災警報器(親局)TR1から他の全ての火災警報器(子局)TRjに対して火災警報メッセージを同期ビーコンに含めて周期的に送信することで確実に火災警報を報知することができる。その結果、無線信号の衝突を回避しつつ複数の火災警報器TRを効果的に連動させることができる。   In addition, when all the fire alarms TR are triggered by sounding an alarm sound, as described above, a synchronous beacon is transmitted from the master station TR1 at a fixed period, and a transition to TDMA synchronous communication is made. However, the control unit 1 of the master station TR1 repeatedly transmits a fire alarm message to all the slave stations TRj at a constant cycle by including it in the synchronous beacon. The control unit 1 of each slave station TRj checks the state of the alarm unit 5 every time a fire alarm message transmitted from the master station TR1 is received. If the alarm unit 5 is stopped, the control unit 1 again Sound an alarm sound. Therefore, after fire alarms are started to be notified by all fire alarms TR, all other fire alarms (children) are assigned to multiple time slots defined by the synchronized beacon transmitted by a specific fire alarm (master station) TR1. Stations) TRj can be assigned to perform wireless communication using time division multiple access (TDMA) to avoid collisions.Furthermore, a specific fire alarm (master station) TR1 to all other fire alarms (children) The fire alarm can be reliably notified by periodically transmitting the fire alarm message to the TRj including the synchronous beacon. As a result, a plurality of fire alarms TR can be effectively linked while avoiding radio signal collision.

上述のように本実施形態によれば、火災発生時には全ての火災警報器TRで火災警報が報知されるので、利用者が火災警報を知覚する(警報音を聞く)機会が増えるために安全性を向上することができる。   As described above, according to the present embodiment, since fire alarms are notified by all fire alarms TR in the event of a fire, safety is increased because the user has more opportunities to perceive fire alarms (listening to alarm sounds). Can be improved.

ところで、本実施形態の火災警報システムは、何れの火災警報器TRにおいても火災が検出されていない状態(待機状態)と、全ての火災警報器TRが警報音を鳴動している状態(連動鳴動状態)と、後述するように火災を検出している(火元の)火災警報器TRのみが警報音を鳴動し、火元以外の火災警報器TRが警報音を停止している状態(連動停止状態)との間で動作状態を遷移させている。すなわち、待機状態において少なくとも何れか１台の火災警報器TR(例えば、子局TR2)で火災が検出されると、上述したように火元の子局TR2並びに親局TR1から他の全ての子局TR3,…に火災警報メッセージが送信されることで親局TR1と子局TRjを含む全ての火災警報器TRで警報音が鳴動されて連動鳴動状態に遷移する。   By the way, the fire alarm system of this embodiment is in a state where no fire is detected in any of the fire alarms TR (standby state) and in a state where all the fire alarms TR are sounding an alarm sound (linked sounding). Status), as described later, only the fire alarm TR that detects the fire (fire source) sounds the alarm sound, and the fire alarm TR other than the fire source stops the alarm sound (linked) The operation state is transited between the (stop state). That is, when a fire is detected by at least one of the fire alarm devices TR (for example, the slave station TR2) in the standby state, as described above, all the other slaves from the fire source slave station TR2 and the master station TR1. When a fire alarm message is transmitted to the stations TR3,..., An alarm sound is sounded in all the fire alarm devices TR including the master station TR1 and the slave station TRj, and a transition to the interlocking sounding state is made.

そして、連動鳴動状態において何れかの火災警報器TRの操作入力受付部６で警報音の鳴動を停止するための操作入力が受け付けられた場合、当該火災警報器TRが親局TR1であれば親局TR1から全ての子局TRjに対して警報音の停止を要求するメッセージ(警報停止メッセージ)を送信することにより、あるいは、当該火災警報器TRが子局TRjであれば当該子局TRjから警報停止メッセージを受け取った親局TR1が他の子局TRjに対して警報停止メッセージを送信することにより、火元以外の火災警報器TRで警報音が停止されて連動停止状態に遷移する。但し、火元の火災警報器TRの操作入力受付部６で警報音停止の操作入力が受け付けられた場合、当該火元の火災警報器TRにおいても警報音を停止する。ここで、親局TR1の制御部１はメモリ部1aに親局TR1並びに各子局TRj毎の火災検出状況を随時更新しながら保持しており、後述するように全ての火災警報器TRで火災が検出されなくなったときに火災連動状態から待機状態に遷移する。   When an operation input for stopping the alarm sound is received by the operation input receiving unit 6 of any fire alarm device TR in the interlocking sounding state, if the fire alarm device TR is the master station TR1, By sending a message (alarm stop message) requesting stop of alarm sound from station TR1 to all slave stations TRj or if the fire alarm TR is a slave station TRj, an alarm is issued from the slave station TRj When the master station TR1 that has received the stop message transmits an alarm stop message to the other slave station TRj, the alarm sound is stopped by the fire alarm device TR other than the fire source, and a transition is made to the interlocking stop state. However, when an operation input for stopping the alarm sound is received by the operation input receiving unit 6 of the fire alarm device TR of the fire source, the alarm sound is also stopped in the fire alarm device TR of the fire source. Here, the control unit 1 of the master station TR1 holds the fire detection status for each master station TR1 and each slave station TRj in the memory unit 1a while being updated as needed. Transition from the fire interlocking state to the standby state when no longer occurs.

また、連動鳴動状態から連動停止状態に遷移した場合、親局TR1の制御部１では所定の警報音停止時間(例えば、５分間)の限時を開始する。そして、警報音停止時間が経過したのち、親局TR1の制御部１はメモリ部1aに保持している火災検出状況を参照し、全ての火災警報器TRで火災を検出していなければ、同期ビーコンによって復旧通知のメッセージを送信することで火災連動状態から待機状態に遷移し、仮に少なくとも１台の火災警報器TRで火災を検出していれば、同期ビーコンによって火災警報メッセージを送信することで連動停止状態から連動鳴動状態へ遷移させる。なお、連動停止状態において何れかの火災警報器TRが新たに火災を検出した場合にも親局TR1の制御部１が同期ビーコンによって火災警報メッセージを送信することで連動停止状態から連動鳴動状態へ遷移させる。   Further, when the interlocking sounding state is changed to the interlocking stop state, the control unit 1 of the master station TR1 starts a predetermined alarm sound stop time (for example, 5 minutes). Then, after the warning sound stop time has elapsed, the control unit 1 of the master station TR1 refers to the fire detection status held in the memory unit 1a, and if all the fire alarms TR have not detected a fire, they are synchronized. By sending a recovery notification message with a beacon, the fire-linked state transitions to the standby state, and if a fire is detected by at least one fire alarm TR, a fire alarm message is sent with a synchronous beacon. Transition from the linked stop state to the linked ringing state. Even if any fire alarm TR detects a new fire in the interlock stop state, the control unit 1 of the master station TR1 transmits the fire alarm message by the synchronous beacon to change from the interlock stop state to the interlock ringing state. Transition.

例えば、図４のタイムチャートに示すように、親局TR1を火元とする火災連動状態(連動鳴動状態)において、火元でない子局TR4の操作入力受付部６で警報音停止の操作入力が受け付けられることで当該子局TR4から警報停止メッセージが送信されると、警報停止メッセージを受け取った親局TR1の制御部１は同期ビーコンによって警報停止メッセージM2を送信しつつ警報音停止時間の限時を行う。但し、火元である親局TR1では警報部５による警報音の鳴動は継続される。そして、警報音停止時間が経過したのち、親局TR1の制御部１は自らの火災感知部４による火災検出状況並びに子局TRjおける火災検出状況を確認し、少なくとも何れか１台の火災警報器TRが火災を検出しているときは再度火災警報メッセージを同期ビーコンにより各子局TRjに送信することで連動停止状態から連動鳴動状態へ遷移させる。   For example, as shown in the time chart of FIG. 4, in a fire-linked state (linked ringing state) with the master station TR1 as the fire source, an operation input for stopping the alarm sound is made at the operation input reception unit 6 of the slave station TR4 that is not the fire source. When the alarm stop message is transmitted from the slave station TR4 by being accepted, the control unit 1 of the master station TR1 that has received the alarm stop message transmits the alarm stop message M2 by the synchronous beacon and sets the time limit of the alarm sound stop time. Do. However, in the master station TR1, which is the source of fire, the alarm unit 5 continues to sound an alarm sound. After the alarm sound stop time has elapsed, the control unit 1 of the master station TR1 confirms the fire detection status of its own fire detection unit 4 and the fire detection status of the slave station TRj, and at least one of the fire alarms When the TR detects a fire, the fire alarm message is transmitted again to each slave station TRj by a synchronous beacon to make a transition from the interlock stop state to the interlock ringing state.

一方、図５のタイムチャートに示すように、警報音停止時間内に火災が鎮火して火災感知部４が火災を検出しなくなっていれば、親局TR1の制御部１は警報音停止時間が経過したのちに同期ビーコンによって各子局TRjに復旧通知メッセージを送信し、全ての子局TRjから返信されるACKを受け取った時点で連動停止状態から待機状態に遷移し、同期ビーコンの送信を停止することでTDMA方式による無線通信から間欠送信・間欠受信による無線通信に戻る。   On the other hand, as shown in the time chart of FIG. 5, if the fire is extinguished within the alarm sound stop time and the fire detection unit 4 stops detecting the fire, the control unit 1 of the master station TR1 After a lapse, a recovery notification message is sent to each slave station TRj by a synchronous beacon, and when an ACK returned from all slave stations TRj is received, the interlocked stop state is changed to the standby state, and the synchronous beacon transmission is stopped. As a result, the wireless communication using the TDMA system returns to the wireless communication using intermittent transmission and reception.

また、図６のタイムチャートに示すように、子局TR4を火元とする連動鳴動状態において、火元の火災が鎮火して子局TR4の火災感知部４が火災を検出しなくなれば、子局TR4から親局TR1に宛てて復旧通知メッセージが送信される。当該復旧通知メッセージを受け取った親局TR1の制御部１はメモリ部1aに保持している火災検出状況を参照し、全ての火災警報器TRで火災を検出していなければ同期ビーコンによって復旧通知メッセージM3を各子局TRjに送信する。そして、全ての子局TRjから返信されるACKを親局TR1の制御部１が受け取れば、連動停止状態から待機状態に遷移し、同期ビーコンの送信を停止することでTDMA方式による無線通信から間欠送信・間欠受信による無線通信に戻る。   In addition, as shown in the time chart of FIG. 6, if the fire of the fire station is extinguished and the fire detection unit 4 of the slave station TR4 does not detect the fire in the interlocking ringing state with the slave station TR4 as the fire source, A recovery notification message is transmitted from the station TR4 to the master station TR1. The control unit 1 of the master station TR1 that has received the recovery notification message refers to the fire detection status held in the memory unit 1a. If no fire is detected by all the fire alarms TR, the recovery notification message is sent by a synchronous beacon. M3 is transmitted to each slave station TRj. Then, if the control unit 1 of the master station TR1 receives ACKs returned from all the slave stations TRj, it transitions from the interlocking stop state to the standby state, and stops transmitting synchronous beacons, thereby intermittently starting from the TDMA wireless communication. Return to wireless communication by transmission and intermittent reception.

一方、図７のタイムチャートに示すように、新たに別の火災警報器(例えば、子局TR3)で火災が検出された場合、初めの火元である子局TR4から復旧通知メッセージを受け取った親局TR1の制御部１は、メモリ部1aに保持している火災検出状況を参照し、子局TR3が火災検出中であることから復旧通知メッセージを送信せず、引き続き火災警報メッセージを送信することで火災連動状態を維持する。   On the other hand, as shown in the time chart of FIG. 7, when a fire is newly detected by another fire alarm device (for example, the slave station TR3), a recovery notification message is received from the slave station TR4 that is the first fire source. The control unit 1 of the master station TR1 refers to the fire detection status held in the memory unit 1a, and does not send a recovery notification message because the slave station TR3 is detecting a fire, and continues to send a fire alarm message. To maintain a fire-linked state.

ここで、同期信号を受信することによって、中継局(親局TR1)以外の全ての無線局(子局TRj)の受信制御手段(制御部１)が受信手段(無線送受信部２)を起動するタイミングが揃い、しかも、イベント(火災感知)が発生した無線局(親局TR1及び子局TRj)の送信制御手段(制御部１)が受信手段の起動するタイミングに合わせて無線信号を送信するので、一の無線局(親局TR1又は子局TRj)から送信される無線信号を他の全ての無線局(子局TRj)がほぼ同時に受信することができる。さらに、中継局(親局TR1)の受信制御手段(制御部１)が受信手段(無線送受信部２)を起動するタイミングを、他の無線局(子局TRj)の受信制御手段(制御部１)が受信手段(無線送受信部２)を起動するタイミングとずらしているので、以下に説明するように、子局TR2から送信される無線信号が親局TR1に中継されて他の子局TR3で受信されるまでの最大遅延時間を従来よりも短くすることができる。   Here, by receiving the synchronization signal, the reception control means (control section 1) of all the radio stations (slave stations TRj) other than the relay station (master station TR1) activates the reception means (radio transmission / reception section 2). Because the transmission control means (control unit 1) of the radio station (master station TR1 and slave station TRj) where the timing (fire detection) has occurred, the radio signal is transmitted in accordance with the timing when the reception means is activated. All other radio stations (slave stations TRj) can receive radio signals transmitted from one radio station (master station TR1 or slave station TRj) almost simultaneously. Furthermore, the reception control means (control section 1) of the relay station (master station TR1) activates the reception means (wireless transmission / reception section 2) at the timing when the reception control means (control section 1) of the other radio station (slave station TRj) ) Is shifted from the timing of starting the receiving means (wireless transmission / reception unit 2), as described below, the radio signal transmitted from the slave station TR2 is relayed to the master station TR1 and transmitted to the other slave station TR3. The maximum delay time until reception is shorter than before.

例えば、図８(ａ)に示すように子局TR2において間欠受信の終了直後に火災を感知した場合、当該子局TR2の制御部１は、親局TR1の間欠受信間隔Tx1のカウント完了時点を含む送信期間に火災警報メッセージを含む無線信号を送信する。そして、親局TR1の制御部１は、子局TRjの間欠受信間隔Tx2のカウント完了時点を含む送信期間に火災警報メッセージを含む無線信号を中継(送信)する。その結果、子局TR2で火災が感知されてから全ての無線局で火災警報メッセージを受け取るまでに要する時間を子局TRjの間欠受信間隔Tx2よりも短くすることができる。   For example, when a fire is detected immediately after the end of intermittent reception in the slave station TR2 as shown in FIG. 8 (a), the control unit 1 of the slave station TR2 determines the count completion point of the intermittent reception interval Tx1 of the master station TR1. A wireless signal including a fire alarm message is transmitted during a transmission period including the transmission period. Then, the control unit 1 of the master station TR1 relays (transmits) the radio signal including the fire alarm message during the transmission period including the count completion time of the intermittent reception interval Tx2 of the slave station TRj. As a result, the time required from when the slave station TR2 detects a fire until the radio alarm message is received by all the radio stations can be made shorter than the intermittent reception interval Tx2 of the slave station TRj.

また、図８(b)に示すように子局TR2において親局TR1の間欠受信の終了直後に火災を感知した場合、当該子局TR2の制御部１は、子局TRjの間欠受信間隔Tx2のカウント完了時点を含む送信期間に火災警報メッセージを含む無線信号を送信した後、親局TR1の間欠受信間隔Tx1のカウント完了時点を含む送信期間にも火災警報メッセージを含む無線信号を送信する。このとき、子局TR2から送信された無線信号が子局TR4で受信できなかったとしても、親局TR1の制御部１が子局TRjの間欠受信間隔Tx2のカウント完了時点を含む送信期間に火災警報メッセージを含む無線信号を中継(送信)することにより、子局TR4においても火災警報メッセージを受け取ることができる。その結果、子局TR2で火災が感知されてから全ての無線局で火災警報メッセージを受け取るまでに要する時間を、子局TRjの間欠受信間隔Tx2の２倍よりも短くすることができる。   Also, as shown in FIG. 8 (b), when the slave station TR2 detects a fire immediately after the end of the intermittent reception of the master station TR1, the control unit 1 of the slave station TR2 sets the intermittent reception interval Tx2 of the slave station TRj. After transmitting the radio signal including the fire alarm message during the transmission period including the count completion time point, the wireless signal including the fire alarm message is also transmitted during the transmission period including the count completion time point of the intermittent reception interval Tx1 of the master station TR1. At this time, even if the radio signal transmitted from the slave station TR2 cannot be received by the slave station TR4, the control unit 1 of the master station TR1 fires during the transmission period including the time point when the intermittent reception interval Tx2 of the slave station TRj is completed. By relaying (transmitting) the radio signal including the alarm message, the slave station TR4 can also receive the fire alarm message. As a result, it is possible to make the time required from when the fire is detected at the slave station TR2 to receive the fire alarm message at all the radio stations shorter than twice the intermittent reception interval Tx2 of the slave station TRj.

ここで、親局TR1の間欠受信間隔Tx1のカウント完了時点と子局TRjの間欠受信間隔Tx2のカウント完了時点との時間差ΔTx1,ΔTx2は、親局TR1における待機時間Tw1と子局TRjにおける待機時間Tw2との時間差に等しい。そして、この時間差ΔTx1,ΔTx2を、図９に示すように無線信号の送信期間Tyと休止期間Tzの合計期間(=Ty+Tz)よりも短くない時間に設定しておけば(ΔTx1≧Ty+Tz,ΔTx2≧Ty+Tz)、子局TRjから送信された無線信号を親局TR1で中継する場合においても確実に休止期間Tzを確保することができる。   Here, the time difference ΔTx1, ΔTx2 between the count completion time of the intermittent reception interval Tx1 of the master station TR1 and the count completion time of the intermittent reception interval Tx2 of the slave station TRj is the standby time Tw1 in the master station TR1 and the standby time in the slave station TRj Equal to the time difference from Tw2. If this time difference ΔTx1, ΔTx2 is set to a time not shorter than the total period (= Ty + Tz) of the radio signal transmission period Ty and the pause period Tz as shown in FIG. 9 (ΔTx1 ≧ Ty + Tz, ΔTx2 ≧ Ty + Tz), and even when the radio signal transmitted from the slave station TRj is relayed by the master station TR1, the pause period Tz can be reliably ensured.

なお、受信制御手段(制御部１)によってカウントが中止させられるまでタイマ手段(制御部１のタイマ)がカウントする間欠受信間隔Tx1,Tx2と、受信制御手段によってカウントが再開させられて後にタイマ手段がカウントする間欠受信間隔Tx1,Tx2とを等しく設定した場合、消費電力を同じとすれば遅延時間をさらに短くできる。一方、受信制御手段によってカウントが中止させられるまでタイマ手段がカウントする間欠受信間隔Tx1,Tx2に対して、受信制御手段によってカウントが再開させられて後にタイマ手段がカウントする間欠受信間隔Tx1,Tx2を長く設定した場合、遅延時間を同じとすれば消費電力をさらに低減できる。   It should be noted that the intermittent reception intervals Tx1, Tx2 that the timer means (the timer of the control section 1) counts until the reception control means (control section 1) stops the count, and the timer means after the count is restarted by the reception control means. When the intermittent reception intervals Tx1 and Tx2 that are counted are set equal, the delay time can be further shortened if the power consumption is the same. On the other hand, for the intermittent reception intervals Tx1, Tx2 counted by the timer means until the count is stopped by the reception control means, the intermittent reception intervals Tx1, Tx2 counted by the timer means after the count is restarted by the reception control means When the time is set long, the power consumption can be further reduced if the delay time is the same.

TR1 火災警報器(中継を行う無線局)
TR2,TR3 火災警報器（中継を行わない無線局）
１ 制御部（送信制御手段，受信制御手段，タイマ手段）
２ 無線送受信部（送信手段，受信手段）
７ 電池電源部（給電手段） TR1 Fire alarm (relay radio station)
TR2, TR3 Fire alarm (radio station that does not relay)
1 Control unit (transmission control means, reception control means, timer means)
2 Wireless transceiver (transmitting means, receiving means)
7 Battery power supply (power supply means)

Claims (10)

複数の無線局からなり、これら複数の無線局間で電波を媒体とする無線信号を送受信する無線通信システムであって、
各無線局は、無線信号を送信する送信手段と、無線信号を受信する受信手段と、所定のイベントが発生したときに前記送信手段を起動し、所定の送信期間に前記イベントに対応したメッセージを含む無線信号を送信させるとともに所定の休止期間に無線信号の送信を休止させる動作を交互に繰り返し且つ前記イベントが発生していないときには前記送信手段を停止させる送信制御手段と、一定の間欠受信間隔を繰り返しカウントするタイマ手段と、当該タイマ手段による間欠受信間隔のカウント中は前記受信手段を停止させ、前記タイマ手段による間欠受信間隔のカウントが完了する度に前記受信手段を起動する受信制御手段と、電池を電源として各手段の動作電源を供給する給電手段とを備え、
前記受信制御手段は、前記受信手段で同期信号を受信した場合に前記タイマ手段による間欠受信間隔のカウントを中止させるとともに、当該同期信号の終了時点から一定の待機時間が経過した時点で前記タイマ手段による間欠受信間隔のカウントを再開させ、
前記送信制御手段は、前記イベントが発生した場合、前記タイマ手段による間欠受信間隔のカウントが完了する時点と重なる前記送信期間に前記送信手段から無線信号を送信させ、
前記複数の無線局のうちの少なくとも１つの無線局の前記送信制御手段は、前記メッセージを含む無線信号を受信した場合に当該メッセージを含む無線信号を前記送信期間に前記送信手段から他の無線局へ中継してなり、
当該中継を行う無線局の前記受信制御手段は、他の中継を行わない無線局の前記受信制御手段における前記待機時間と異なる待機時間を有することを特徴とする無線通信システム。 A wireless communication system comprising a plurality of wireless stations and transmitting and receiving wireless signals using radio waves as a medium between the plurality of wireless stations,
Each radio station activates the transmission unit when a predetermined event occurs, and transmits a message corresponding to the event during a predetermined transmission period, a transmission unit that transmits a radio signal, a reception unit that receives the radio signal, Including a transmission control unit that alternately repeats the operation of transmitting a wireless signal including the transmission of the wireless signal and stopping the transmission of the wireless signal during a predetermined suspension period, and stopping the transmission unit when the event does not occur, and a constant intermittent reception interval. Timer means for repeatedly counting, reception control means for stopping the reception means during counting of the intermittent reception interval by the timer means, and starting the reception means every time counting of the intermittent reception interval by the timer means is completed, Power supply means for supplying operation power of each means using a battery as a power source,
The reception control means stops counting the intermittent reception interval by the timer means when the synchronization signal is received by the reception means, and the timer means when a certain waiting time has elapsed from the end of the synchronization signal Restart the intermittent reception interval by
When the event occurs, the transmission control unit causes the transmission unit to transmit a radio signal during the transmission period overlapping with a time point at which the intermittent reception interval is counted by the timer unit,
When the transmission control means of at least one of the plurality of wireless stations receives a wireless signal including the message, the transmission control means transmits the wireless signal including the message from the transmitting means to the other wireless station during the transmission period. Relay to
The radio communication system according to claim 1, wherein the reception control unit of the radio station that performs the relay has a standby time different from the standby time of the reception control unit of the radio station that does not perform another relay. 前記中継を行わない無線局の前記送信制御手段は、他の中継を行わない無線局において前記間欠受信間隔のカウントが完了する時点と、前記中継を行う無線局において前記間欠受信間隔のカウントが完了する時点とのうちで早い方の時点に前記無線信号を前記送信手段から送信させることを特徴とする請求項１記載の無線通信システム。   The transmission control means of the wireless station that does not perform the relay completes the counting of the intermittent reception interval at the time when the counting of the intermittent reception interval is completed in the wireless station that does not perform the relay and the wireless station that performs the relay 2. The wireless communication system according to claim 1, wherein the wireless signal is transmitted from the transmitting means at an earlier time point among the time points to be transmitted. 前記中継を行う無線局の前記送信制御手段は、前記メッセージを含む無線信号を受信した場合に当該メッセージを含む無線信号を、他の中継を行わない無線局において前記間欠受信間隔のカウントが完了する時点に前記送信手段から送信させることを特徴とする請求項２記載の無線通信システム。   The transmission control means of the radio station that performs the relay completes counting the intermittent reception interval of the radio signal that includes the message when the radio signal that includes the message is received by another radio station that does not perform the relay 3. The wireless communication system according to claim 2, wherein transmission is performed from the transmission means at a point in time. 前記中継を行う無線局における前記待機時間と前記中継を行わない無線局における前記待機時間との時間差は、前記送信期間と前記休止期間の合計期間よりも短くない時間であることを特徴とする請求項１〜３の何れか１項に記載の無線通信システム。   The time difference between the standby time in the radio station that performs the relay and the standby time in the radio station that does not perform the relay is a time that is not shorter than a total period of the transmission period and the pause period. Item 4. The wireless communication system according to any one of Items 1 to 3. 複数の前記無線局のうちの何れか１つの無線局の前記送信制御手段は、前記同期信号を前記送信手段から送信させることを特徴とする請求項１〜４の何れか１項に記載の無線通信システム。   5. The radio according to claim 1, wherein the transmission control unit of any one of the plurality of radio stations transmits the synchronization signal from the transmission unit. 6. Communications system. 複数の前記無線局の前記送信制御手段は、各無線局毎に決められた順番で前記同期信号を前記送信手段から送信させることを特徴とする請求項５記載の無線通信システム。   6. The wireless communication system according to claim 5, wherein the transmission control means of the plurality of wireless stations causes the transmission means to transmit the synchronization signal in an order determined for each wireless station. 各無線局の前記送信制御手段は、前記同期信号を受信したときに応答メッセージを含む無線信号を前記送信手段から送信させ、前記同期信号を送信する無線局は、前記受信手段で前記応答メッセージを含む無線信号を受信するか否かによって他の無線局が正常に動作しているか否かを判断する判断手段を備えたことを特徴とする請求項５又は６記載の無線通信システム。   The transmission control means of each radio station transmits a radio signal including a response message from the transmission means when the synchronization signal is received, and the radio station that transmits the synchronization signal transmits the response message by the reception means. 7. The wireless communication system according to claim 5, further comprising a determination unit that determines whether or not another wireless station is operating normally depending on whether or not the wireless signal is received. 前記各無線局の前記送信制御手段は、前記イベントに対応したメッセージを含む無線信号を受信したときに前記同期信号を受信したときと共通の処理を実行することを特徴とする請求項１〜７の何れか１項に記載の無線通信システム。   8. The transmission control means of each of the radio stations, when receiving a radio signal including a message corresponding to the event, executes a process common to when the synchronization signal is received. The wireless communication system according to any one of the above. 前記同期信号を送信する送信局を有することを特徴とする請求項１〜４の何れか１項に記載の無線通信システム。   The wireless communication system according to claim 1, further comprising a transmission station that transmits the synchronization signal. 前記無線局は、火災を感知する火災感知手段と、火災感知手段で火災が感知されたときに警報音を鳴動する火災警報手段とを備え、
送信制御手段は、火災感知手段で火災が感知されたときに火災警報メッセージを含む無線信号を送信手段より送信させ、
受信制御手段は、受信手段で受信した無線信号に火災警報メッセージが含まれている場合に火災警報手段に警報音を鳴動させることを特徴とする請求項１〜９の何れか１項に記載の無線通信システム。 The radio station includes a fire detection means for detecting a fire, and a fire alarm means for sounding an alarm sound when a fire is detected by the fire detection means,
The transmission control means causes the transmission means to transmit a radio signal including a fire alarm message when a fire is detected by the fire detection means,
The reception control means causes the fire alarm means to sound an alarm sound when a fire alarm message is included in the radio signal received by the receiving means. Wireless communication system.
JP2010137618A 2010-06-16 2010-06-16 Wireless communication system Expired - Fee Related JP5541975B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010137618A JP5541975B2 (en) 2010-06-16 2010-06-16 Wireless communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010137618A JP5541975B2 (en) 2010-06-16 2010-06-16 Wireless communication system

Publications (2)

Publication Number Publication Date
JP2012004825A true JP2012004825A (en) 2012-01-05
JP5541975B2 JP5541975B2 (en) 2014-07-09

Family

ID=45536313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2010137618A Expired - Fee Related JP5541975B2 (en) 2010-06-16 2010-06-16 Wireless communication system

Country Status (1)

Country Link
JP (1) JP5541975B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012049831A (en) * 2010-08-26 2012-03-08 Panasonic Electric Works Co Ltd Radio communications system
JP2018182369A (en) * 2017-04-03 2018-11-15 株式会社システムデザイン Communication system and communication apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002077978A (en) * 2000-08-25 2002-03-15 Matsushita Electric Ind Co Ltd Apparatus and method for radio relay and recording medium
JP2002077979A (en) * 2000-08-25 2002-03-15 Matsushita Electric Ind Co Ltd Apparatus and method for radio relay and recording medium
JP2009230406A (en) * 2008-03-21 2009-10-08 Panasonic Electric Works Co Ltd Wireless transmission system
JP2010147868A (en) * 2008-12-19 2010-07-01 Panasonic Electric Works Co Ltd Wireless communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002077978A (en) * 2000-08-25 2002-03-15 Matsushita Electric Ind Co Ltd Apparatus and method for radio relay and recording medium
JP2002077979A (en) * 2000-08-25 2002-03-15 Matsushita Electric Ind Co Ltd Apparatus and method for radio relay and recording medium
JP2009230406A (en) * 2008-03-21 2009-10-08 Panasonic Electric Works Co Ltd Wireless transmission system
JP2010147868A (en) * 2008-12-19 2010-07-01 Panasonic Electric Works Co Ltd Wireless communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012049831A (en) * 2010-08-26 2012-03-08 Panasonic Electric Works Co Ltd Radio communications system
JP2018182369A (en) * 2017-04-03 2018-11-15 株式会社システムデザイン Communication system and communication apparatus

Also Published As

Publication number Publication date
JP5541975B2 (en) 2014-07-09

Similar Documents

Publication Publication Date Title
JP5513737B2 (en) Fire alarm system
JP5222123B2 (en) Fire alarm system
JP5134424B2 (en) Fire alarm system
JP4944804B2 (en) Fire alarm system
JP5492021B2 (en) Wireless communication system
JP5015855B2 (en) Fire alarm system
JP5541975B2 (en) Wireless communication system
JP5502611B2 (en) Wireless communication system
JP5507979B2 (en) Wireless communication system
JP5480691B2 (en) Wireless communication system
JP5391056B2 (en) Wireless communication system
JP5543290B2 (en) Radio station and radio communication system
JP5091747B2 (en) Fire alarm system
JP5302877B2 (en) Wireless communication system
JP5600761B2 (en) Wireless communication system
JP5492022B2 (en) Wireless communication system
JP5391321B2 (en) Fire alarm system
JP5369060B2 (en) Fire alarm system
JP5308326B2 (en) Wireless communication system
JP5308235B2 (en) Alarm system
JP5123028B2 (en) Fire alarm system
JP5314589B2 (en) Wireless communication system
JP4525850B2 (en) Fire alarm system
JP5406704B2 (en) Wireless communication system
JP5406462B2 (en) Fire alarm system

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20120118

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20130510

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20140121

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140122

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140317

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20140408

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20140502

LAPS Cancellation because of no payment of annual fees