JP6402456B2 - Wireless communication network system, wireless terminal, time correction method, program - Google Patents
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Description
本発明は、無線通信ネットワークシステムに関し、特に上位の収集装置の下り通信で付加された時刻補正情報を用いて下位の各端末が時刻を補正し、補正した時刻に基づいて各端末が一斉に決められた時刻に計測を行い収集装置が計測データを収集する無線通信ネットワークシステムに関する。 The present invention relates to a wireless communication network system, and in particular, each lower terminal corrects the time using time correction information added in downlink communication of a higher-level collection device, and each terminal determines all at once based on the corrected time. The present invention relates to a wireless communication network system in which measurement is performed at a given time and a collection device collects measurement data.
計測データを取得する無線端末を用いて、一定の時間間隔で何らかの計測結果を上位の収集装置に無線送信する従来の無線通信ネットワークシステムは、小型化、低価格化などの制約から、システム全体を統括する収集装置が有する時計に対して自端末の動作を同期させる時計に精度の高いものを使用することができない。 A conventional wireless communication network system that wirelessly transmits some measurement results to a higher-level collection device at a fixed time interval using a wireless terminal that acquires measurement data is based on restrictions such as downsizing and cost reduction. It is not possible to use a highly accurate clock that synchronizes the operation of the terminal with respect to the clock of the central collection device.
そのため従来は、各端末が計測した計測データをパケット化し他の無線端末を中継しながら上位の収集装置に送信する際には、各端末が計測し発信するパケットに対して途中の無線端末が当該パケットの中継のために要した時間を記録させながら当該パケットを中継し、当該パケットの情報を収集する収集装置で時刻を補正することで各端末が計測した時点の正しい時刻を算出する無線通信ネットワークシステムが採用されていた。 Therefore, conventionally, when the measurement data measured by each terminal is packetized and transmitted to a higher-level collection device while relaying other wireless terminals, the wireless terminal in the middle of the packet measured and transmitted by each terminal A wireless communication network that calculates the correct time measured by each terminal by relaying the packet while recording the time required for relaying the packet, and correcting the time by a collection device that collects information of the packet The system was adopted.
一方、下記特許文献１の図１、４〜６には、基幹装置を根元として複数の無線装置がツリー状に接続されたマルチホップ無線ネットワークにおいて、基幹装置１２は、カウンタ２０でカウントしたスーパーフレーム５０の開始時刻からの経過時間に応じたカウント値をパケット７２内のネットワーク情報部中のスロット同期格納部９６に設定し、設定したパケット７２を基幹装置１２に割り当てられたタイムスロット６２で同報送信し、第１無線装置１６ａのカウンタ２２ａは、カウントしているカウント値をスロット同期格納部９６中に設定されたカウント値に変更し、変更したカウント値からカウントを再開することで、カウンタ値を用いて時刻同期を取る、すなわち、基幹装置１２と第１無線装置１６ａとの間での相対時刻の同期（時刻同期、従属同期）を取ることができる無線ネットワークシステムが開示されている。 On the other hand, in FIGS. 1 and 4 to 6 of Patent Document 1 below, in a multi-hop wireless network in which a plurality of wireless devices are connected in a tree shape with the backbone device as the root, the backbone device 12 has a superframe counted by the counter 20. The count value corresponding to the elapsed time from the start time of 50 is set in the slot synchronization storage unit 96 in the network information part in the packet 72, and the set packet 72 is broadcast in the time slot 62 assigned to the backbone device 12. The counter 22a of the first wireless device 16a changes the count value being counted to the count value set in the slot synchronization storage unit 96, and restarts counting from the changed count value. Is used to synchronize time, that is, relative time synchronization (time) between the backbone device 12 and the first wireless device 16a. Synchronization, the wireless network system that can take slave synchronization) have been disclosed.
従来、センサネットワーク等の無線通信システムにおいては、一定の時間間隔で何らかの計測結果を上位の収集装置に無線送信する無線端末は、小型化、低価格化などの制約から、上位の収集装置が有する時計に同期させて自端末の動作タイミングを規定する時計に精度の高いものを使用することができないため、各端末が計測し上位の収集装置に発信するパケットに中継に要した時間を記録させ、それに基づいて上位の収集装置で補正することで計測した正しい時刻を算出していたが、一斉に決められた時刻に各端末が計測を行って上位の収集装置に計測結果を送信することは不可能であった。 Conventionally, in a wireless communication system such as a sensor network, a wireless terminal that wirelessly transmits a measurement result at a certain time interval to a higher-order collection device is included in the higher-order collection device because of restrictions such as downsizing and cost reduction. Because it is not possible to use a highly accurate clock that regulates the operation timing of its own terminal in synchronization with the clock, each terminal measures and records the time required for relaying in the packet sent to the upper collection device, Based on this, correct time was calculated by correcting with the higher-level collection device, but it is not possible for each terminal to measure at the same time and send the measurement result to the higher-level collection device. It was possible.
また上記特許文献１に記載された無線ネットワークシステムにおける基幹装置及び各無線装置間の時刻同期方式では、基幹装置１２がネットワーク情報部中のスロット同期格納部９６に設定したスーパーフレーム５０の開始時刻からの経過時間に応じたカウント値に基づき、時刻同期を取ることで、基幹装置１２と第１無線装置１６ａとの間での相対時刻の同期を取るものであり、一斉に決められた時刻に各端末が計測を行って上位の収集装置に計測結果を送信することについては何も触れていない。 In the time synchronization method between the backbone device and each wireless device in the wireless network system described in Patent Document 1, the backbone device 12 starts from the start time of the superframe 50 set in the slot synchronization storage unit 96 in the network information portion. By synchronizing the time based on the count value according to the elapsed time, the relative time is synchronized between the backbone device 12 and the first wireless device 16a, and each time is determined at the same time. Nothing is said about the terminal taking measurements and sending the measurement results to the host collection device.
そこで本発明の目的は、収集装置の下り通信に付加した時刻補正情報に基づいて各端末が時刻を補正することで、各端末が一斉に決められた時刻に計測を実施し収集装置に送信可能とすることにある。 Accordingly, an object of the present invention is that each terminal corrects the time based on the time correction information added to the downlink communication of the collection device, so that each terminal can perform measurement at the same time and transmit it to the collection device. It is to do.
上記目的を達成するために本発明の無線通信ネットワークシステムは、データを無線にて送信する無線送信回路と、無線で送信されたデータを受信する無線受信回路とを有する複数の無線端末で構成される無線通信ネットワークシステムにおいて、該無線通信ネットワークシステムは、一つの収集装置となる無線端末と、該収集装置となる無線端末からの下り通信経路に位置する複数の中継装置となる無線端末とを含み、
収集装置となる前記無線端末は、
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信したら、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有し、
中継装置となる前記無線端末は、
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にして前記ビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信できるようにする間欠動作制御手段と、
自無線端末の前記無線受信回路の動作状態中に前記第１の他の無線端末から送信された送信要求を受信する送信要求受信手段と、
該送信要求受信手段が前記送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信する受信確認信号送信手段と、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信するデータ受信手段と、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正する時刻補正手段と、
該データを受信した場合に、前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測する中継時間計測手段と、
該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自端末装置の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有することを特徴とする。
Wireless communication network system of the present invention in order to achieve the above object, structure and radio transmission circuitry for transmitting data wirelessly, a plurality of wireless end end and a radio receiving circuit for receiving data transmitted wirelessly in a wireless communication network system that is, wireless communication network system includes a wireless terminal which is one of the collecting device, and a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device Including
The wireless terminal serving as a collection device is:
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein A transmission request transmission means for transmitting a transmission request to the other wireless terminal that is the transmission source of the beacon;
A reception confirmation signal receiving means for receiving a reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is a transmission partner of the reception confirmation signal. Data transmission means for transmitting data including the elapsed time from the time of occurrence of the transmission event to the time of data transmission;
Data confirmation signal receiving means for receiving a data confirmation signal transmitted from the other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means; Have
The wireless terminal serving as a relay device is:
Intermittently at a fixed period, and the wireless transmission circuit of the radio terminal to the operating state transmitting the beacon, in the operating state the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal An intermittent operation control means for receiving a transmission request transmitted from a first other wireless terminal located above the downlink communication path and capable of direct communication with the own wireless terminal ;
A transmission request receiving means for receiving a transmission request transmitted from the first other wireless terminal during an operation state of the wireless reception circuit of the own wireless terminal ;
When the transmission request receiving means receives the transmission request, a reception confirmation signal transmitting means for transmitting a reception confirmation signal to the first other wireless terminal by setting the wireless transmission circuit of its own wireless terminal to an operating state;
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Data receiving means for receiving data from the first other wireless terminal ;
Time correction means for correcting the own wireless terminal time based on the time correction information when the data is received;
When the data is received, a relay time measuring unit that starts a relay time measurement timer of the own wireless terminal to relay the data and measures a relay time in the own wireless terminal;
When receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, a second possible direct communication between a position to and the radio terminal to the lower of the downlink communication path than the radio terminal other waits to receive the state of the beacon from the radio terminal, when receiving the beacon in the period, the self above with a radio transmitter circuit to an operation state of the terminal device, the second other said a beacon source A transmission request transmission means for transmitting a transmission request to the wireless terminal of
A reception confirmation signal receiving means for receiving a reception confirmation signal from the second other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon Data transmission means for transmitting data including the elapsed time obtained by adding the elapsed time of
A data confirmation signal for receiving a data confirmation signal transmitted from the second other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means Receiving means.
上記において、前記時刻補正情報は、下り通信パケットのヘッダ部の時刻情報欄に付加され、該時刻情報欄は、送信開始時刻(Tstart)と中継時間(Ttrans)を領域に含んでいることを特徴とする。 In the above, the time correction information is added to a time information field in a header portion of a downlink communication packet, and the time information field includes a transmission start time (Tstart) and a relay time (Ttrans) in an area. And
上記目的を達成するために本発明の無線通信ネットワークシステムにおける収集装置となる無線端末は、データを無線にて送信する無線送信回路と、無線で送信されたデータを受信する無線受信回路とを有する複数の無線端末で構成される無線通信ネットワークシステムにおいて、該無線通信ネットワークシステムは、一つの収集装置となる無線端末と、該収集装置となる無線端末からの下り通信経路に位置する複数の中継装置となる無線端末とを含んで成り、
収集装置となる前記無線端末は、
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有することを特徴とする
To achieve the above object, a wireless terminal serving as a collection device in a wireless communication network system of the present invention includes a wireless transmission circuit that transmits data wirelessly and a wireless reception circuit that receives data transmitted wirelessly. in a wireless communication network system including a plurality of wireless terminals end, wireless communication network system includes a wireless terminal which is one of the collecting device, a plurality of relay located downstream communication path from the wireless terminal as the the collection device comprises a radio terminal as the device,
The wireless terminal serving as a collection device is:
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein A transmission request transmission means for transmitting a transmission request to the other wireless terminal that is the transmission source of the beacon;
A reception confirmation signal receiving means for receiving a reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is the transmission partner of the reception confirmation signal. Data transmission means for transmitting data including the elapsed time from the time of occurrence of the transmission event to the time of data transmission;
Data confirmation signal receiving means for receiving a data confirmation signal transmitted from the other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means; It is characterized by having
上記目的を達成するために本発明の無線通信ネットワークシステムにおける中継装置となる無線端末は、データを無線にて送信する無線送信回路と、無線で送信されたデータを受信する無線受信回路とを有する複数の無線端末で構成される無線通信ネットワークシステムにおいて、該無線通信ネットワークシステムは、一つの収集装置となる無線端末と、該収集装置となる無線端末からの下り通信経路に位置する複数の中継装置となる無線端末とを含んで成り、
中継装置となる前記無線端末は、
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にしてビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信できるようにする間欠動作制御手段と、
自無線端末の前記無線受信回路の動作状態中に前記第１の他の無線端末から送信された送信要求を受信する送信要求受信手段と、
該送信要求受信手段が前記送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信する受信確認信号送信手段と、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信するデータ受信手段と、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正する時刻補正手段と、
該データを受信した場合に、前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測する中継時間計測手段と、
該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有することを特徴とする。
To achieve the above object, a wireless terminal serving as a relay device in the wireless communication network system of the present invention includes a wireless transmission circuit that wirelessly transmits data and a wireless reception circuit that receives data transmitted wirelessly. in a wireless communication network system including a plurality of wireless terminals end, wireless communication network system includes a wireless terminal which is one of the collecting device, a plurality of relay located downstream communication path from the wireless terminal as the the collection device comprises a radio terminal as the device,
The wireless terminal serving as a relay device is:
Intermittently at a fixed period, the own the radio terminal by the radio transmission circuit in an operating state send a bi bacon, and the operating state of the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal An intermittent operation control means for receiving a transmission request transmitted from a first other wireless terminal located above the downlink communication path and capable of direct communication with the own wireless terminal ;
A transmission request receiving means for receiving a transmission request transmitted from the first other wireless terminal during an operation state of the wireless reception circuit of the own wireless terminal ;
When the transmission request receiving means receives the transmission request, a reception confirmation signal transmitting means for transmitting a reception confirmation signal to the first other wireless terminal by setting the wireless transmission circuit of its own wireless terminal to an operating state;
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Data receiving means for receiving data from the first other wireless terminal ;
Time correction means for correcting the own wireless terminal time based on the time correction information when the data is received;
When the data is received, a relay time measuring unit that starts a relay time measurement timer of the own wireless terminal to relay the data and measures a relay time in the own wireless terminal;
When receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, a second possible direct communication between a position to and the radio terminal to the lower of the downlink communication path than the radio terminal other waits to receive the state of the beacon from the radio terminal, when receiving the beacon in the period, the radio terminal said by the radio transmission circuit to an operation state of said second other said a beacon source A transmission request transmission means for transmitting a transmission request to the wireless terminal of
A reception confirmation signal receiving means for receiving a reception confirmation signal from the second other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon Data transmission means for transmitting data including the elapsed time obtained by adding the elapsed time of
A data confirmation signal for receiving a data confirmation signal transmitted from the second other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means Receiving means.
上記目的を達成するために本発明の時刻補正方法は、データを無線にて送信する無線送信回路と、無線で送信されたデータを受信する無線受信回路とを有する複数の無線端末で構成される無線通信ネットワークシステムにおいて、一つの収集装置となる無線端末と、該収集装置となる無線端末からの下り通信経路に位置する複数の中継装置となる無線端末とを含んで成る無線通信ネットワークシステムにおける時刻補正方法であって、
収集装置となる前記無線端末は、
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信し、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信し、
該受信確認信号を受信したら、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信し、
該データ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信し、
一方、中継装置となる前記無線端末は、
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にして前記ビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信し、
該送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信し、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信し、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正すると共に前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測し、さらに該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信して、前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信し、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信し、
該データ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信するようにしたものである。
Time correction method of the present invention in order to achieve the above object is constructed as a radio transmitting circuit for transmitting data wirelessly, a plurality of wireless end end and a radio receiving circuit for receiving data transmitted wirelessly in that wireless communication network system, and a wireless terminal which is one of the collection device, in a wireless communication network system comprising a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device A time correction method,
The wireless terminal serving as a collection device is:
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein Send a transmission request to the other wireless terminal that is the source of the beacon,
Receiving the reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is a transmission partner of the reception confirmation signal. Send data containing the elapsed time from the time of the transmission event to the time of data transmission,
After the data transmission, the wireless reception circuit of its own wireless terminal is put into an operating state, and a data confirmation signal transmitted from the other wireless terminal that is the transmission partner of the data is received,
On the other hand, the wireless terminal as a relay device is
Intermittently at a fixed period, and the wireless transmission circuit of the radio terminal to the operating state transmitting the beacon, in the operating state the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal Also receives a transmission request transmitted from the first other wireless terminal located above the downlink communication path and capable of direct communication with the own wireless terminal ,
When the transmission request is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and a reception confirmation signal is transmitted to the first other wireless terminal,
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Receiving data from the first other wireless terminal ;
When receiving the data, measures a relay time in the radio terminal is allowed to the radio terminal starts a relay time measurement timer for relaying the data is corrected on the basis of the own wireless terminal time with the time correction information and, when further receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, capable of communicating directly between the position and and its own radio terminal to the lower of the downlink communication path than the radio terminal second waits to receive the state of the beacon from another wireless terminal such, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein the said is a beacon of sender sends a transmission request to the two other wireless terminals, receiving an acknowledgment signal from said second other wireless terminal which is the source of the beacon,
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon Send the data containing the elapsed time that is added to the elapsed time of
After the data transmission, the wireless reception circuit of the own wireless terminal is set in an operating state to receive a data confirmation signal transmitted from the second other wireless terminal that is the transmission partner of the data.
また本発明の収集装置となる無線端末を制御するコンピュータに実行させるプログラムは、データを無線にて送信する無線送信回路と、無線で送信されたデータを受信する無線受信回路とを有する複数の無線端末で構成される無線通信ネットワークシステムにおいて、一つの収集装置となる無線端末と、該収集装置となる無線端末からの下り通信経路に位置する複数の中継装置となる無線端末とを含んで成る無線通信ネットワークシステムにおける収集装置となる前記無線端末のコンピュータを、
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信する送信要求送信手段、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信する受信確認信号受信手段、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信するデータ送信手段、および、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段、として機能させるようにしたものである。
A program to be executed by a computer that controls a wireless terminal serving as a collection device according to the present invention includes a plurality of wireless communication circuits including a wireless transmission circuit that transmits data wirelessly and a wireless reception circuit that receives data transmitted wirelessly. in a wireless communication network system configured by end end, comprising a wireless terminal which is one of the collecting device, and a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device A computer of the wireless terminal serving as a collection device in a wireless communication network system,
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein A transmission request transmission means for transmitting a transmission request to the other wireless terminal that is the transmission source of the beacon;
A reception confirmation signal receiving means for receiving a reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is the transmission partner of the reception confirmation signal. A data transmission means for transmitting data including the elapsed time from the time of occurrence of the transmission event to the time of data transmission; and
A data confirmation signal receiving means for receiving a data confirmation signal transmitted from the other wireless terminal which is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal in an operating state after data transmission by the data transmission means; It is made to function as.
また本発明の中継装置となる無線端末を制御するコンピュータに実行させるプログラムは、データを無線にて送信する無線送信回路と、無線で送信されたデータを受信する無線受信回路とを有する複数の無線端末で構成される無線通信ネットワークシステムにおいて、一つの収集装置となる無線端末と、該収集装置となる無線端末からの下り通信経路に位置する複数の中継装置となる無線端末とを含んで成る無線通信ネットワークシステムにおける中継装置となる前記無線端末のコンピュータを、
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にして前記ビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信できるようにする間欠動作制御手段、
自無線端末の前記無線受信回路の動作状態中に前記第１の他の無線端末から送信された送信要求を受信する送信要求受信手段、
該送信要求受信手段が前記送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信する受信確認信号送信手段、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信するデータ受信手段、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正する時刻補正手段、
該データを受信した場合に、前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測する中継時間計測手段と、
該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信する受信確認信号受信手段、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信するデータ送信手段、および、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段、として機能させるようにしたものである。
A program to be executed by a computer that controls a wireless terminal serving as a relay device according to the present invention includes a plurality of wireless devices including a wireless transmission circuit that transmits data wirelessly and a wireless reception circuit that receives data transmitted wirelessly. in a wireless communication network system configured by end end, comprising a wireless terminal which is one of the collecting device, and a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device A computer of the wireless terminal serving as a relay device in a wireless communication network system,
Intermittently at a fixed period, and the wireless transmission circuit of the radio terminal to the operating state transmitting the beacon, in the operating state the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal Intermittent operation control means for receiving a transmission request transmitted from a first other wireless terminal that is located above the downlink communication path and can communicate directly with the own wireless terminal ,
A transmission request receiving means for receiving a transmission request transmitted from the first other wireless terminal during an operation state of the wireless reception circuit of the own wireless terminal ;
A reception confirmation signal transmission means for transmitting a reception confirmation signal to the first other wireless terminal by setting the wireless transmission circuit of its own wireless terminal in an operating state when the transmission request receiving means receives the transmission request;
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Data receiving means for receiving data from the first other wireless terminal ;
Time correction means for correcting the time of the own wireless terminal based on the time correction information when the data is received;
When the data is received, a relay time measuring unit that starts a relay time measurement timer of the own wireless terminal to relay the data and measures a relay time in the own wireless terminal;
When receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, a second possible direct communication between a position to and the radio terminal to the lower of the downlink communication path than the radio terminal other waits to receive the state of the beacon from the radio terminal, when receiving the beacon in the period, the radio terminal said by the radio transmission circuit to an operation state of said second other said a beacon source A transmission request transmission means for transmitting a transmission request to the wireless terminal of
A reception confirmation signal receiving means for receiving a reception confirmation signal from the second other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon A data transmission means for transmitting data including an elapsed time obtained by adding the elapsed time of
A data confirmation signal for receiving a data confirmation signal transmitted from the second other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means It is made to function as a receiving means.
本発明によれば、一つの収集装置となる無線端末と、複数の中継装置となる無線端末を含んで成る無線通信ネットワークシステムにおける収集装置の下り通信において時刻補正情報を付加し、付加された時刻補正情報に基づいて各端末が時刻を補正するだけなので、無線通信ネットワークシステムにおける時刻同期の構成を簡易化することができる。 According to the present invention, time correction information is added in downlink communication of a collection device in a wireless communication network system including a wireless terminal serving as one collection device and wireless terminals serving as a plurality of relay devices. Since each terminal only corrects the time based on the correction information, the configuration of time synchronization in the wireless communication network system can be simplified.
また本発明の収集装置は、従来のような時刻補正処理をしなくて済むため、収集装置の構成を簡易化することができる。 In addition, since the collecting apparatus of the present invention does not need to perform time correction processing as in the prior art, the configuration of the collecting apparatus can be simplified.
以下、本発明の実施の形態について、詳細に説明する。
図１は、本発明の実施形態に係る無線通信ネットワークシステムの構成例を示す図である。図１において、本発明の実施形態に係る無線通信ネットワークシステムは、例えば、メッシュを構成する各端末ＡないしＦが目的の端末へパケットを中継するためのネットワーク構成情報をあらかじめ作成し各端末に保持しているものとする。すなわち、
図１（ａ）は、端末ＡないしＦがメッシュ状に配置された無線通信ネットワークシステムを示すものである。なお、図示の実線は、端末間が無線で直接通信可能であることを示し、実線が接続されていない端末間は、他の端末を中継することで通信が行うことができるものである。そして図１（ａ）に示す本発明の実施形態に係る無線通信ネットワークシステムは、使用環境を選ばないため、無線による監視制御装置を構成するうえで非常に有効である。
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a diagram illustrating a configuration example of a wireless communication network system according to an embodiment of the present invention. In FIG. 1, the wireless communication network system according to the embodiment of the present invention, for example, creates in advance network configuration information for each terminal A to F configuring a mesh to relay a packet to a target terminal and holds the network configuration information in each terminal. Suppose you are. That is,
FIG. 1A shows a wireless communication network system in which terminals A to F are arranged in a mesh shape. The solid line shown in the figure indicates that the terminals can directly communicate with each other by radio, and the terminals that are not connected to the solid line can perform communication by relaying other terminals. The wireless communication network system according to the embodiment of the present invention shown in FIG. 1 (a) is very effective in configuring a wireless monitoring control device because it does not select a use environment.
図１（ａ）に示す本発明の実施形態に係る無線通信ネットワークシステムを構成する各端末は、インターフェース（後述する）を介してセンサ等の計器、パソコンや上位装置（図示省略）などと接続可能にされており、所定の通信シーケンスに基づいた他の端末からの要求により自端末に係るセンサ等の計器から取り込んだ情報をメッシュ状に配置された他の端末を中継しながら目的の端末に送信するものである。 Each terminal constituting the wireless communication network system according to the embodiment of the present invention shown in FIG. 1A can be connected to an instrument such as a sensor, a personal computer, a host device (not shown), etc. via an interface (described later). The information taken from the measuring instrument such as the sensor related to its own terminal is transmitted to the target terminal while relaying the other terminals arranged in a mesh form in response to a request from the other terminal based on a predetermined communication sequence. To do.
なお、各端末は、ネットワークトポロジーにおける自己位置を公知の存在確認パケット（図示せず）を相互に遣り取りして把握し、相互に遣り取りして更新した位置情報を通信開始前にそれぞれ図１（ｂ），（ｃ）に示す構成情報テーブルに保存している。図１（ｂ）は上記のように存在確認パケット（図示せず）を相互に遣り取りして把握した端末Ａ自身の構成情報テーブルの内容の一例を示すものであり、また図１（ｃ）は、端末Ａで把握されている隣接する他の端末Ｂ，Ｃ，Ｄの構成情報テーブルの内容の一例を示すものである。なお、構成情報テーブル自体は既に公知であり、これ以上の説明を省くものとする。 Each terminal grasps its own location in the network topology by exchanging known presence confirmation packets (not shown) with each other, and exchanges the location information exchanged with each other before the start of communication. ) And (c) are stored in the configuration information table. 1 (b) is intended showing an example of the content of the terminal A own configuration information table grasped by exchanging the existence confirmation packet (not shown) to each other as described above, and FIG. 1 (c) FIG. 4 shows an example of the contents of the configuration information table of other adjacent terminals B, C, and D recognized by the terminal A. FIG. Note that the configuration information table itself is already known, and further explanation is omitted.
図２は、本発明の実施形態に係る無線端末の構成を示す機能ブロック図である。図２に示すように、本発明の実施形態に係る無線端末１１は、情報の送受信の制御を行う制御部１２、無線部１３内にあって、情報を無線にて送信する無線送信回路１４及び無線で送信された情報を受信する無線受信回路１５、情報送受信の切り替えを行う切り替え部１６、情報を電波として空間に送出したり受信したりするアンテナ１７、制御部１２と無線部１３と間欠動作制御部２０に電源を供給する直流電源(例．電池)１８、不図示の上位装置と情報のやり取りを行うインターフェース１９、タイマ（不図示）が設けられ制御部１２や無線部１３に所定の周期で動作信号を送って制御部１２や無線部１３を間欠的に動作させる間欠動作制御部２０を備えている。 FIG. 2 is a functional block diagram showing the configuration of the wireless terminal according to the embodiment of the present invention. As shown in FIG. 2, a wireless terminal 11 according to an embodiment of the present invention includes a control unit 12 that controls transmission / reception of information, a wireless transmission circuit 14 that transmits information wirelessly, and a wireless unit 13. Wireless receiving circuit 15 for receiving information transmitted wirelessly, switching unit 16 for switching information transmission / reception, antenna 17 for sending and receiving information as a radio wave to space, control unit 12 and wireless unit 13 and intermittent operation A DC power source (eg, battery) 18 for supplying power to the control unit 20, an interface 19 for exchanging information with a host device (not shown), and a timer (not shown) are provided, and the control unit 12 and the radio unit 13 have a predetermined cycle. Is provided with an intermittent operation control unit 20 that sends an operation signal to operate the control unit 12 and the wireless unit 13 intermittently.
なお、インターフェース１９を介して情報のやり取りを行う上位装置としては、例えば、パソコン等の情報処理装置、計装機器を構成するスイッチ、センサ、表示器などを挙げることができる。 Note that examples of the host device that exchanges information via the interface 19 include an information processing device such as a personal computer, a switch, a sensor, and a display that constitute an instrumentation device.
さらに制御部１２には、メモリ３３を内蔵するパケット送受信制御部３２、データ送信部３４、データ受信部３６およびシーケンス制御部３５が設けられている。
ここでパケット送受信制御部３２は、メモリ３３に格納されたパケットデータ（例えば、計測データ、中継データなど）を読取ってデータ送信部３４に渡すとともにデータ受信部３６で受信したパケットをメモリ３３に格納する制御を行う。またシーケンス制御部３５は、パケットの送信および受信、並びに切り替え部１６の切り替え制御を行う。シーケンス制御部３５は適宜、パケット送受信制御部３２と制御信号を遣り取りしパケットの送信、および、受信を所定のシーケンスで実行する。
Further, the control unit 12 is provided with a packet transmission / reception control unit 32 having a built-in memory 33, a data transmission unit 34, a data reception unit 36, and a sequence control unit 35.
Here, the packet transmission / reception control unit 32 reads packet data (for example, measurement data, relay data, etc.) stored in the memory 33 and passes the packet data to the data transmission unit 34 and stores the packet received by the data reception unit 36 in the memory 33. Control. The sequence control unit 35 performs transmission and reception of packets and switching control of the switching unit 16. The sequence control unit 35 exchanges control signals with the packet transmission / reception control unit 32 as appropriate, and executes transmission and reception of packets in a predetermined sequence.
本発明の実施形態に係る無線端末の通信シーケンスで使用する各種制御信号、例えば、同期用ビーコン（ＲＮＯ）、送信要求信号（ＳＲＥＱ）、受信確認信号（ＲＡＣＫ）、データ受信確認信号（ＤＡＣＫ）は、パケット送受信制御部３２内で作成され、シーケンス制御部３５の制御の下に送受信無線端末間で遣り取りを行うようにしている。なお具体的な通信シーケンスについては後述する。 Various control signals used in the communication sequence of the wireless terminal according to the embodiment of the present invention, for example, synchronization beacon (RNO), transmission request signal (SREQ), reception confirmation signal (RACK), and data reception confirmation signal (DACK) are The packet transmission / reception control unit 32 creates and exchanges data between the transmission / reception wireless terminals under the control of the sequence control unit 35. A specific communication sequence will be described later.
パケット送受信制御部３２は、同期用ビーコン（ＲＮＯ）を作成しており、間欠動作制御部２０およびシーケンス制御部３５の制御の下に同期用ビーコン（ＲＮＯ）を定周期に無線送信回路１４を介して送信する。 The packet transmission / reception control unit 32 creates a synchronization beacon (RNO), and the synchronization beacon (RNO) is transmitted through the wireless transmission circuit 14 at regular intervals under the control of the intermittent operation control unit 20 and the sequence control unit 35. To send.
シーケンス制御部３５は、パケットの送受に関する一連のシーケンスに必要な制御信号、すなわち、送信要求信号（ＳＲＥＱ）、その受信確認信号（ＲＡＣＫ）、データ（ＤＡＴＡ）送信に対するデータ受信確認信号（ＤＡＣＫ）の各フォーマットデータの送受信に関与して、無線送信回路１４および無線受信回路１５を介して送受信する。この際、無線受信回路１５で受信した送信要求信号（ＳＲＥＱ）の受信確認信号（ＲＡＣＫ）、データ（ＤＡＴＡ）のデータ受信確認信号（ＤＡＣＫ）は適宜、パケット送受信制御部３２に伝達される。 The sequence control unit 35 receives control signals necessary for a series of sequences related to packet transmission / reception, that is, a transmission request signal (SREQ), a reception confirmation signal (RACK), and a data reception confirmation signal (DACK) for data (DATA) transmission. Involved in transmission / reception of each format data, transmission / reception is performed via the wireless transmission circuit 14 and the wireless reception circuit 15. At this time, the reception confirmation signal (RACK) of the transmission request signal (SREQ) received by the wireless reception circuit 15 and the data reception confirmation signal (DACK) of data (DATA) are appropriately transmitted to the packet transmission / reception control unit 32.
なお間欠動作制御部２０、パケット送受信制御部３２およびシーケンス制御部３５は、例えばＣＰＵ／ＭＰＵ等を含んで構成され、当該ＣＰＵ／ＭＰＵ等が予めメモリ等に記憶されている所定のアプリケーションプログラムを実行することにより所定の制御を行う。特にパケット送受信制御部３２におけるメモリ３３には、上記図１（ｂ）、（ｃ）に示す構成情報等も記憶される。また、メモリ３３には、自端末に予め任意に割り当てられている端末識別ＩＤ（無線端末識別子）が予め（例えば設置の際の初期登録作業等で）登録・記憶される。 The intermittent operation control unit 20, the packet transmission / reception control unit 32, and the sequence control unit 35 are configured to include, for example, a CPU / MPU, and the CPU / MPU executes a predetermined application program stored in advance in a memory or the like. Thus, predetermined control is performed. In particular, the memory 33 in the packet transmission / reception control unit 32 also stores configuration information and the like shown in FIGS. 1 (b) and 1 (c). Further, in the memory 33, a terminal identification ID (wireless terminal identifier) arbitrarily assigned to the own terminal is registered and stored in advance (for example, in initial registration work at the time of installation).
図３は、本発明の実施形態に係る収集装置のパケット送信シーケンスを示す図である。図１に示す本発明の実施形態に係る無線通信ネットワークシステムには、端末ＡないしＦと記載されているだけで、どの端末が“収集装置(集計端末とも呼ばれる)”であるかを明示していないが、複数の端末のうちどれか一つが“収集装置”に設定されることになる。 FIG. 3 is a diagram showing a packet transmission sequence of the collection device according to the embodiment of the present invention. In the wireless communication network system according to the embodiment of the present invention shown in FIG. 1, only the terminals A to F are described, which clearly indicates which terminal is a “collection device (also called a totaling terminal)”. However, one of the plurality of terminals is set as the “collection device”.
図３において収集装置(TMx)は、送信要求が発生(送信事象の発生とも云う)すると、図４の下り通信パケットフォーマットに示すヘッダ部１１０の時刻情報１４０における送信開始時刻（Tstart）部１４１に自己の保持する現在時刻を、また中継時間（Ttrans）部１４２に０(ゼロ)をそれぞれ設定し、同期待ち(同期用ビーコン受信待ち)に移行する。同期待ちへの移行と同時に中継時間計測用タイマ（図示せず）による計測をスタートさせる。なお、上述したように図２に示す制御部１２は、ＣＰＵ／ＭＰＵ等およびメモリ等を含んでおり、上記タイマを“ソフトタイマ”として実現することができる。 In FIG. 3, when a transmission request is generated (also referred to as a transmission event), the collection device (TMx) displays a transmission start time (Tstart) unit 141 in the time information 140 of the header unit 110 shown in the downlink communication packet format of FIG. The current time held by itself is set to 0 (zero) in the relay time (Ttrans) unit 142, respectively, and a transition is made to waiting for synchronization (waiting for receiving a synchronization beacon). Simultaneously with the shift to synchronization waiting, measurement by a relay time measuring timer (not shown) is started. As described above, the control unit 12 shown in FIG. 2 includes a CPU / MPU, a memory, and the like, and the timer can be realized as a “soft timer”.
ここで図４の下り通信パケットフォーマットについてさらに説明すると、下り通信パケットのフォーマットは、ヘッダ部１１０とデータ部１２０に分けられ、ヘッダ部１１０は、更に、宛先情報１３０と時刻情報１４０とに分けられている。 Here, the downlink communication packet format of FIG. 4 will be further described. The format of the downlink communication packet is divided into a header part 110 and a data part 120, and the header part 110 is further divided into destination information 130 and time information 140. ing.
ヘッダ部１１０における時刻情報１４０は、送信開始時刻（Tstart）部１４１と、中継時間（Ttrans）部１４２とから成り、送信開始時刻（Tstart）部１４１は、収集装置が自端末の時刻を設定して送信するための情報領域を表しており、中継時間（Ttrans）部１４２は、各中継端末が中継に要した時間を積算して他の端末に送信するための情報領域を表している。また、下り通信パケットフォーマットのデータ部１２０は、送信されるデータの内容を表す情報領域として送信データ部１５０として設けられている。 The time information 140 in the header part 110 includes a transmission start time (Tstart) part 141 and a relay time (Ttrans) part 142. The transmission start time (Tstart) part 141 sets the time of the own terminal by the collection device. The relay time (Ttrans) unit 142 represents an information area for accumulating the time required for each relay terminal to transmit to other terminals. The data portion 120 in the downlink communication packet format is provided as a transmission data portion 150 as an information area representing the content of data to be transmitted.
なお本実施形態における「送信要求」は、図３や図６に例示するように、収集装置であれば収集装置が発する時刻補正指令、また中継端末であれば上位装置からの送信指令、他の端末から送信された中継情報を受信した際の中継指令などで、それぞれ送信要求が立上る(送信事象の発生となる)。 Note that the “transmission request” in this embodiment is a time correction command issued by the collection device if it is a collection device, a transmission command from a higher-level device if it is a relay terminal, as illustrated in FIG. 3 or FIG. A transmission request is raised by a relay command or the like when receiving relay information transmitted from the terminal (a transmission event occurs).
図３に戻って、本発明の実施形態に係る無線通信ネットワークシステムが例えばセンサネットワークであれば上位の収集装置に計測データを送信することとなる送信端末（TMa）からＲＮＯ（同期用ビーコン）を上位の収集装置が受信する。なお図３に示した端末（TMa）は、図１に示した端末Ａを指すものでない。 Returning to FIG. 3, if the wireless communication network system according to the embodiment of the present invention is, for example, a sensor network, an RNO (synchronization beacon) is transmitted from a transmission terminal (TMa) that transmits measurement data to a higher-level collection device. The higher-level collection device receives it. Note that the terminal (TMa) illustrated in FIG. 3 does not indicate the terminal A illustrated in FIG.
ＲＮＯ（同期用ビーコン）を受信すると、これに応答して収集装置(TMx)は端末（TMa）に送信要求信号（ＳＲＥＱ）を送信する。これを受信すると送信端末（TMa）は、受信確認信号（ＲＡＣＫ）を収集装置(TMx)に送信するので収集装置(TMx)はこれを受信する。収集装置(TMx)は、これに応じてデータ（ＤＡＴＡ）を送信端末（TMa）に送信する。このとき収集装置(TMx)はヘッダ部１１０の中継時間（Ttrans）部１４２を「Ttrans + Tx」に更新して送信する。中継時間（Ttrans）部１４２が更新された下り通信用のパケットに示すデータ（ＤＡＴＡ）を送信端末（TMa）が受信すると、送信端末（TMa）はデータ受信確認信号（ＤＡＣＫ）を送信して、一連の通信シーケンスを終了する。 Upon receiving RNO (synchronization beacon), in response to this, the collection device (TMx) transmits a transmission request signal (SREQ) to the terminal (TMa). When receiving this, the transmitting terminal (TMa) transmits a reception confirmation signal (RACK) to the collecting device (TMx), and thus the collecting device (TMx) receives it. In response to this, the collection device (TMx) transmits data (DATA) to the transmission terminal (TMa). At this time, the collection device (TMx) updates the relay time (Ttrans) part 142 of the header part 110 to “Ttrans + Tx” and transmits it. When the transmission terminal (TMa) receives the data (DATA) indicated in the packet for downlink communication in which the relay time (Ttrans) unit 142 is updated, the transmission terminal (TMa) transmits a data reception confirmation signal (DACK), A series of communication sequences is completed.
ここで収集装置を基点にした時刻補正機能を説明する。上記したように収集装置は、下り通信パケットで図４に示すフォーマットの時刻情報１４０の送信開始時刻（Tstart）部１４１と、中継時間（Ttrans）部１４２に所定の時刻情報を設定した上で送信する。この下り通信パケットを受信した全ての端末は、自端末の時刻を、収集装置が設定した送信開始時刻（Tstart）部１４１に設定してある“Tstart”と、図４に示すフォーマットの時刻情報１４０の中継時間(Ttrans)部１４２に設定している時間にこの下り通信パケットを無線通信ネットワークの中継端末が中継に要した中継時間を加算した時刻とを合算した時刻に変更する。この操作を収集装置との通信シーケンスに関係した宛先の端末だけでなく、中継に携わった全ての中継端末も実施する。これにより各端末が一斉に決められた時刻に計測を行い、計測した情報を上り通信で上位の収集装置に送信することができるようになる。 Here, the time correction function based on the collection device will be described. As described above, the collection device transmits the downlink communication packet after setting predetermined time information in the transmission start time (Tstart) unit 141 and the relay time (Ttrans) unit 142 of the time information 140 in the format shown in FIG. To do. All the terminals that have received this downlink communication packet have their time set to “Tstart” set in the transmission start time (Tstart) unit 141 set by the collection device, and time information 140 in the format shown in FIG. The time set in the relay time (Ttrans) section 142 of the mobile station is changed to a time obtained by adding the time when the downlink communication packet is added to the relay time required for the relay terminal of the wireless communication network to relay. This operation is performed not only on the destination terminal related to the communication sequence with the collection apparatus but also on all the relay terminals involved in the relay. As a result, each terminal can perform measurement at the time determined at the same time, and the measured information can be transmitted to a higher-level collection device by upstream communication.
このように本発明の無線通信ネットワークシステムは、上位の収集装置からの下り通信において、時刻補正情報を付加することにより、下り通信に付加された時刻補正情報を受信した各端末は自端末の時刻を当該時刻補正情報を用いて補正し、補正した時刻に基づいて各端末一斉に決められた時刻に計測を行い、計測したデータを上り通信で上位の収集装置に送信するようにしたものである。 As described above, in the wireless communication network system of the present invention, each terminal that has received the time correction information added to the downlink communication adds the time correction information in the downlink communication from the higher-level collection device, so that the time of its own terminal Is corrected using the time correction information, and measurement is performed at a time determined by all terminals based on the corrected time, and the measured data is transmitted to a higher-level collection device by upstream communication. .
図５は、本発明の実施形態にかかる収集装置の処理フローを示す図である。図５において、収集装置は、ステップＳ５１において、下り通信用パケットを作成し、図４に示す下り通信パケットフォーマットに、送信するパケットの情報を格納する。すなわち、図４の宛先情報１３０にデータの宛先を格納し、送信開始時刻（Tstart）部１４１に現在時刻を格納し、中継時間（Ttrans）部１４２に０（ゼロ）を格納し、送信データ部１５０に、送信したいデータを格納する。 FIG. 5 is a diagram illustrating a processing flow of the collection device according to the embodiment of the present invention. 5, the collection apparatus, in step S51, creates a downlink communication packet, the downlink communication packet format shown in FIG. 4, it stores the information of a packet to be transmitted. That is, the data destination is stored in the destination information 130 of FIG. 4, the current time is stored in the transmission start time (Tstart) unit 141, 0 (zero) is stored in the relay time (Ttrans) unit 142, and the transmission data unit to 150, to store the data that you want to send.
次に、ステップＳ５２において、無線受信を開始する。すなわち、同期用ビーコン受信待ちとなって、同期用ビーコン（ＲＮＯ）が送られてくるのを待ち受ける。
そしてステップＳ５３において、不図示の中継時間計測用タイマによる計測をスタートさせる。
Next, in step S52, wireless reception is started. That is, it waits for reception of a synchronization beacon and waits for a synchronization beacon (RNO) to be sent.
In step S53, measurement by a relay time measuring timer (not shown) is started.
次いで、ステップＳ５４において、ＲＮＯ（同期用ビーコン）を受信したかを判定する。ＲＮＯを受信できるまでループする。受信したならば、ステップＳ５５に進む。そしてステップＳ５５において、送信要求信号（ＳＲＥＱ）を送信する。 Next, in step S54, it is determined whether an RNO (synchronization beacon) has been received. Loop until RNO is received. If received, the process proceeds to step S55. In step S55, a transmission request signal (SREQ) is transmitted.
次いで、ステップＳ５６において、ＲＡＣＫ（受信確認信号）を受信したかを判定する。ＲＡＣＫを受信できるまでループする。受信したならば、ステップＳ５７に進む。
ステップＳ５７においては、下り通信用パケットを編集して、ヘッダ部１１０の時刻情報１４０中の中継時間（Ttrans）部１４２を当初の「０(ゼロ)」から不図示の中継時間計測用タイマが計測した値である「Ta」に更新する。
Next, in step S56, it is determined whether RACK (reception confirmation signal) has been received. Loop until RACK is received. If received, the process proceeds to step S57.
In step S57, the downlink communication packet is edited, and the relay time measurement timer (not shown) measures the relay time (Ttrans) part 142 in the time information 140 of the header part 110 from the initial “0 (zero)”. Update the value to “Ta”.
そしてステップＳ５８において、図４に示される下り通信用パケットのデータ部１２０に送信データが格納されたＤＡＴＡパケットとして送信する。
なお、図４の下り通信パケットは、無線端末が他の無線端末とやりとりする一連のシーケンスに使用される制御信号のうちのデータ（ＤＡＴＡ）に相当し、図４には同期用ビーコン（ＲＮＯ）、送信要求信号（ＳＲＥＱ）、受信確認信号（ＲＡＣＫ）、および、データ受信確認信号（ＤＡＣＫ）の各種フォーマットについては省略している。
In step S58, the data is transmitted as a DATA packet in which transmission data is stored in the data portion 120 of the downlink communication packet shown in FIG.
Note that the downlink communication packet in FIG. 4 corresponds to data (DATA) in a control signal used for a sequence of wireless terminals communicating with other wireless terminals, and FIG. 4 shows a synchronization beacon (RNO). Various formats of the transmission request signal (SREQ), the reception confirmation signal (RACK), and the data reception confirmation signal (DACK) are omitted.
次いで、ステップＳ５９において、ＤＡＣＫ（データ受信確認信号）を受信したかを判定する。ＤＡＣＫを受信できるまでループする。受信したならば、収集装置は待機状態になる。 Next, in step S59, it is determined whether DACK (data reception confirmation signal) has been received. Loop until DACK is received. If received, the collection device enters a standby state.
図６は、本発明の実施形態にかかる下り通信パケットの中継シーケンスを示す図である。図６においては、一例として、端末（TMa）、端末（TMb）および端末（TMc）が、下り通信パケットの中継動作に関わる端末であるとして説明する。なお図６に示した端末（TMa）、端末（TMb）および端末（TMc）は、図１に示した端末Ａ、端末Ｂおよび端末Ｃを指すものでない。 FIG. 6 is a diagram showing a relay sequence of downlink communication packets according to the embodiment of the present invention. In FIG. 6, as an example, a description will be given assuming that the terminal (TMa), the terminal (TMb), and the terminal (TMc) are terminals involved in the relay operation of the downlink communication packet. Note that the terminals (TMa), (TMb), and (TMc) shown in FIG. 6 do not refer to the terminals A, B, and C shown in FIG.
図６において、中継端末（TMa）は、送信要求が発生すると、同期待ち(同期用ビーコン受信待ち)となると共に中継時間計測用タイマ（図示せず）による計測をスタートさせ、中継端末（TMa）における中継待ち時間を上記タイマの計測開始によってカウントする。一方、中継端末（TMb）は、自端末の時間スケジュールに基づいて待機時間が経過したら同期用ビーコン（ＲＮＯ）を送信する。 In FIG. 6, when a transmission request is generated, the relay terminal (TMa) waits for synchronization (waits for reception of a synchronization beacon) and starts measurement by a relay time measuring timer (not shown), thereby repeating the relay terminal (TMa). The relay waiting time is counted at the start of the timer measurement. On the other hand, the relay terminal (TMb) transmits a synchronization beacon (RNO) when the standby time has elapsed based on the time schedule of the terminal itself.
中継端末（TMb）が送信する同期用ビーコン（ＲＮＯ）を中継端末（TMa）が受信したならば、中継端末（TMb）に対して送信要求信号（ＳＲＥＱ）を送信する。中継端末（TMb）は送信要求信号（ＳＲＥＱ）を受信したら、中継端末（TMa）にＲＡＣＫ（受信確認信号）を送信する。ＲＡＣＫ（受信確認信号）を受信できたら中継端末（TMa）は、データ（ＤＡＴＡ）を中継端末（TMb）に送信する。このデータ（ＤＡＴＡ）の送信時、中継端末（TMa）は中継時間計測用タイマ（図示せず）が計数した中継待ち時間（Ta）を図４に示される下り通信パケットフォーマットに示すヘッダ部１１０の中継時間（Ttrans）部１４２を“Ttrans + Ta ”に更新し、中継パケットとして図４に示す下り通信パケットフォーマットに含めて送信する。 When the relay terminal (TMa) receives the synchronization beacon (RNO) transmitted by the relay terminal (TMb), the transmission request signal (SREQ) is transmitted to the relay terminal (TMb). When the relay terminal (TMb) receives the transmission request signal (SREQ), the relay terminal (TMb) transmits RACK (reception confirmation signal) to the relay terminal (TMa). When receiving the RACK (reception confirmation signal), the relay terminal (TMa) transmits data (DATA) to the relay terminal (TMb). At the time of transmission of this data (DATA), the relay terminal (TMa) indicates the relay waiting time (Ta) counted by the relay time measuring timer (not shown) in the header 110 shown in the downlink communication packet format shown in FIG. The relay time (Ttrans) unit 142 is updated to “Ttrans + Ta”, and is transmitted as a relay packet included in the downlink communication packet format shown in FIG.
中継端末（TMb）は中継パケットとしての図４に示す下り通信パケットを受信したら、図４に示される下り通信パケットフォーマットに示すヘッダ部１１０の中継時間（Ttrans）部１４２が中継端末（TMa）によって中継時間（Ttrans + Ta ）に更新されていることから、自端末の時刻を、受信した図４に示す下り通信パケットの「受信パケットの送信開始時刻＋中継時間」に、すなわち、図４の下り通信パケットフォーマットに示されるヘッダ部１１０の時刻情報１４０における送信開始時刻（Tstart）部１４１と中継時間（Ttrans）部１４２に格納されている情報に基づいて編集を行い、「受信パケットの送信開始時刻＋中継時間」に時刻補正する。そのうえで中継端末（TMb）は、端末（TMc）に対するパケットの中継動作を開始する。中継動作を開始する前に、中継端末（TMb）は中継端末（TMa）に対して、ＤＡＣＫ（データ受信確認信号）を送信する。 Relay terminal (TMb) is when receiving a downlink communication packet shown in FIG. 4 as a relay packet, the relay time (Ttrans) 142 of the header section 110 shown in downlink communication packet format relay terminal shown in FIG. 4 ( TMa) is updated to the relay time (Ttrans + Ta), so that the time of its own terminal is set to the “reception packet transmission start time + relay time” of the received downlink communication packet shown in FIG. 4 is edited based on the information stored in the transmission start time (Tstart) part 141 and the relay time (Ttrans) part 142 in the time information 140 of the header part 110 shown in the downlink communication packet format 4. The time is corrected to “transmission start time + relay time”. Then, the relay terminal (TMb) starts a packet relay operation for the terminal (TMc). Before starting the relay operation, the relay terminal (TMb) transmits a DACK (data reception confirmation signal) to the relay terminal (TMa).
次に、中継端末（TMb）は自端末の時刻を補正したら、自身の中継時間計測用タイマ（図示せず）による計測をスタートさせ、中継端末（TMb）における中継待ち時間を上記タイマの計測開始によってカウントする。そして中継端末（TMb）は、ＤＡＣＫ（データ受信確認信号）を中継端末（TMa）に送信したら、同期待ち(同期用ビーコン受信待ち)となる。 Next, when the relay terminal (TMb) corrects the time of its own terminal, the relay terminal (TMb) starts measuring the relay waiting time at the relay terminal (TMb) by starting measurement by its relay time measuring timer (not shown). Count by. When the relay terminal (TMb) transmits DACK (data reception confirmation signal) to the relay terminal (TMa), the relay terminal (TMb) waits for synchronization (waits for reception of synchronization beacons).
一方、中継端末（TMc）は、自端末の時間スケジュールに基づいて待機時間が経過したら同期用ビーコン（ＲＮＯ）を中継端末（TMb）に送信する。中継端末（TMb）は中継端末（TMc）から同期用ビーコン（ＲＮＯ）を受信したら、中継端末（TMc）に対して送信要求信号（ＳＲＥＱ）を送信する。 On the other hand, the relay terminal (TMc) transmits a synchronization beacon (RNO) to the relay terminal (TMb) when the standby time has elapsed based on the time schedule of the terminal itself. When the relay terminal (TMb) receives the synchronization beacon (RNO) from the relay terminal (TMc), the relay terminal (TMb) transmits a transmission request signal (SREQ) to the relay terminal (TMc).
中継端末（TMc）は送信要求信号（ＳＲＥＱ）を受信したら、中継端末（TMb）にＲＡＣＫ（受信確認信号）を送信する。ＲＡＣＫ（受信確認信号）を受信したら、中継端末（TMb）は、データ（ＤＡＴＡ）を中継端末（TMc）に送信する。このとき中継端末（TMb）は中継時間計測用タイマ（図示せず）が計測した中継待ち時間（Tb）を図４の下り通信パケットフォーマットに示すヘッダ部１１０の中継時間（Ttrans）部１４２を“Ttrans + Tb ”に更新し、中継パケットとして図４に示す下り通信パケットフォーマットに含めて送信する。中継端末（TMc）は、中継端末（TMb）からデータ（ＤＡＴＡ）を受信したら、ＤＡＣＫ（データ受信確認信号）を中継端末（TMb）に送信し、待機状態になる。 When the relay terminal (TMc) receives the transmission request signal (SREQ), the relay terminal (TMc) transmits RACK (reception confirmation signal) to the relay terminal (TMb). When receiving the RACK (reception confirmation signal), the relay terminal (TMb) transmits data (DATA) to the relay terminal (TMc). At this time, the relay terminal (TMb) sets the relay waiting time (Tb) measured by the relay time measuring timer (not shown) to the relay time (Ttrans) unit 142 of the header unit 110 shown in the downlink communication packet format of FIG. Update to Ttrans + Tb ", and transmit as a relay packet included in the downlink communication packet format shown in FIG. When receiving the data (DATA) from the relay terminal (TMb), the relay terminal (TMc) transmits DACK (data reception confirmation signal) to the relay terminal (TMb) and enters a standby state.
以上のように図４の下り通信パケットフォーマットに示すヘッダ部１１０の中継時間（Ttrans）部１４２には、中継端末が計測した中継待ち時間（=中継時間）が合算されていくので、その合算時間を考慮して各端末が一斉に同時刻で計測可能となるタイミングで計測データを計測することが可能となる。 As described above, the relay waiting time (= relay time) measured by the relay terminal is added to the relay time (Ttrans) portion 142 of the header portion 110 shown in the downlink communication packet format of FIG. Considering the above, it becomes possible to measure the measurement data at a timing at which the terminals can measure at the same time all at once.
図７Ａ及び図７Ｂは、本発明の実施形態にかかる中継端末の処理フローを示す図である。図６を参照しながら図７Ａから順に説明すると、図７Ａにおいて中継端末（TMb）は、ステップＳ６１において、自端末の時間スケジュールに基づいて待機時間が経過したかを監視し、待機時間が経過したらステップＳ６２において同期用ビーコン（ＲＮＯ）を送信する。 7A and 7B are diagrams showing a processing flow of the relay terminal according to the embodiment of the present invention. Referring to FIG. 6 in order from FIG. 7A, in FIG. 7A, in step S61, the relay terminal (TMb) monitors whether the standby time has elapsed based on the time schedule of its own terminal. In step S62, a synchronization beacon (RNO) is transmitted.
ついでステップＳ６３で、中継端末（TMb）は、送信要求信号（ＳＲＥＱ）を受信したかを監視する。送信要求信号（ＳＲＥＱ）を受信したら、ステップＳ６４で、受信確認信号（ＲＡＣＫ）を送信する。 In step S63, the relay terminal (TMb) monitors whether a transmission request signal (SREQ) has been received. When the transmission request signal (SREQ) is received, a reception confirmation signal (RACK) is transmitted in step S64.
次にステップＳ６５で中継端末（TMb）は中継パケットを示すデータ（ＤＡＴＡ）を受信するまで監視を続け、データ（ＤＡＴＡ）を受信したら、中継端末（TMb）はステップＳ６６で、データ（ＤＡＴＡ）の内容である図４に示される下り通信パケットフォーマットを参照して、自端末時刻を受信したパケットの送信開始時刻に中継時間（=中継待ち時間）を加算した値に設定する。そして中継端末（TMb）はステップＳ６７で、中継時間計測用タイマ(不図示)による計測をスタートさせる。その後、ステップＳ６８において、データ受信確認信号（ＤＡＣＫ）を中継端末（TMa）に送信する。 Next, in step S65, the relay terminal (TMb) continues monitoring until it receives data (DATA) indicating the relay packet. When data (DATA) is received, the relay terminal (TMb) receives the data (DATA) in step S66. With reference to the downlink communication packet format shown in FIG. 4 which is the content, a value obtained by adding the relay time (= relay waiting time) to the transmission start time of the packet having received the own terminal time is set. In step S67, the relay terminal (TMb) starts measurement by a relay time measuring timer (not shown). Thereafter, in step S68, a data reception confirmation signal (DACK) is transmitted to the relay terminal (TMa).
ここで図７Ｂに移って、ステップＳ６９において、中継端末（TMb）は無線受信を開始する。すなわち同期用ビーコン（ＲＮＯ）受信待ちとなって、同期用ビーコンが送られてくるのを待ち受ける。そして、ステップＳ７０において中継端末（TMb）は中継端末（TMc）からの同期用ビーコン（ＲＮＯ）の受信を監視する。 Turning now to FIG. 7B, in step S69, the relay terminal (TMb) starts wireless reception. That is, it waits for a synchronization beacon (RNO) reception and waits for a synchronization beacon to be sent. In step S70, the relay terminal (TMb) monitors reception of the synchronization beacon (RNO) from the relay terminal (TMc).
同期用ビーコン（ＲＮＯ）が受信されたら、ステップＳ７１において中継端末（TMb）は送信要求信号（ＳＲＥＱ）を送信する。次いでステップＳ７２において中継端末（TMc）からの受信確認信号（ＲＡＣＫ）の受信を監視する。 When the synchronization beacon (RNO) is received, the relay terminal (TMb) transmits a transmission request signal (SREQ) in step S71. In step S72, reception of a reception confirmation signal (RACK) from the relay terminal (TMc) is monitored.
中継端末（TMb）がステップＳ７２で受信確認信号（ＲＡＣＫ）を受信したら、ステップＳ７３に進み、ステップＳ７３において中継端末（TMb）は、下り通信用パケットの編集を行う。ここでの下り通信用パケットの編集は、中継端末（TMb）の中継時間計測用タイマで計測したタイマ値を図４に示される下り通信パケットフォーマット中の中継時間（Ttrans）部１４２の値に加算することである。 When the relay terminal (TMb) receives the reception confirmation signal (RACK) in step S72, the process proceeds to step S73, and in step S73, the relay terminal (TMb) edits the downlink communication packet. Here, the editing of the packet for downlink communication is performed by adding the timer value measured by the timer for measuring the relay time of the relay terminal (TMb) to the value of the relay time (Ttrans) unit 142 in the downlink communication packet format shown in FIG. It is to be.
そしてステップＳ７４に進み、ステップＳ７４において中継端末（TMb）は、中継端末（TMa）から受信した中継パケットを、中継端末（TMc）にデータ（ＤＡＴＡ）として送信する。そしてステップＳ７５においてデータ受信確認信号（ＤＡＣＫ）の受信を監視し、受信できたならば待機状態に移行することで一連の中継動作を終了する。 In step S74, the relay terminal (TMb) transmits the relay packet received from the relay terminal (TMa) to the relay terminal (TMc) as data (DATA). In step S75, the reception of the data reception confirmation signal (DACK) is monitored, and if it can be received, a series of relay operations is completed by shifting to a standby state.
以上のようにして、各中継端末は中継時間を更新しながら目的の端末まで上記と同様に中継を行うことで目的の端末にデータ（ＤＡＴＡ）を届けることができる。
そして全ての端末に時刻補正情報が付加されたデータ（ＤＡＴＡ）を届けたあとは各端末が自端末の時刻を上記時刻補正情報に基づいて補正することで、計測周期に基づく所定の時間後に、例えば３０分後に、各端末が一斉に同時刻にセンスしたデータを上り通信パケットに含ませて収集装置に送信するので、収集装置は全ての端末が同時刻にセンスしたデータを収集することが可能となる。つまり、従前のような収集装置が各端末から送信されたデータの時刻補正を行う必要を無くし、収集装置が同時刻でセンスしたデータを正確に収集することが可能となるものである。
As described above, each relay terminal can deliver data (DATA) to the target terminal by relaying to the target terminal in the same manner as described above while updating the relay time.
And after delivering the data (DATA) with time correction information added to all terminals, each terminal corrects the time of its own terminal based on the time correction information, and after a predetermined time based on the measurement cycle, For example, after 30 minutes, the data sensed by each terminal at the same time is included in the upstream communication packet and sent to the collection device, so the collection device can collect the data sensed by all terminals at the same time It becomes. That is, it is not necessary for the conventional collecting device to correct the time of the data transmitted from each terminal, and the data sensed by the collecting device at the same time can be collected accurately.
１１ 無線端末
１２ 制御部
１３ 無線部
１４ 無線送信回路
１５ 無線受信回路
１６ 切り替え部
１７ アンテナ
１８ 直流電源
１９ インターフェース
２０ 間欠動作制御部
３２ パケット送受信制御部
３３ メモリ
３４ データ送信部
３５ シーケンス制御部
３６ データ受信部
１１０ ヘッダ部
１２０ データ部
１３０ 宛先情報
１４０ 時刻情報
１４１ 送信開始時刻(Tstart)部
１４２ 中継時間(Ttrans)部
１５０ 送信データ部
DESCRIPTION OF SYMBOLS 11 Wireless terminal 12 Control part 13 Wireless part 14 Wireless transmission circuit 15 Wireless reception circuit 16 Switching part 17 Antenna 18 DC power supply 19 Interface 20 Intermittent operation control part 32 Packet transmission / reception control part 33 Memory 34 Data transmission part 35 Sequence control part 36 Data reception Unit 110 header unit 120 data unit 130 destination information 140 time information 141 transmission start time (Tstart) unit 142 relay time (Ttrans) unit 150 transmission data unit
Claims (7)
収集装置となる前記無線端末は、
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信したら、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有し、
中継装置となる前記無線端末は、
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にして前記ビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信できるようにする間欠動作制御手段と、
自無線端末の前記無線受信回路の動作状態中に前記第１の他の無線端末から送信された送信要求を受信する送信要求受信手段と、
該送信要求受信手段が前記送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信する受信確認信号送信手段と、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信するデータ受信手段と、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正する時刻補正手段と、
該データを受信した場合に、前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測する中継時間計測手段と、
該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自端末装置の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有することを特徴とする無線通信ネットワークシステム。 A wireless transmission circuit for transmitting the data wirelessly, in a wireless communication network system including a plurality of wireless end end and a radio receiving circuit for receiving data transmitted by radio, the wireless communication network system may include one includes a wireless terminal as the One collection device, and a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device,
The wireless terminal serving as a collection device is:
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein A transmission request transmission means for transmitting a transmission request to the other wireless terminal that is the transmission source of the beacon;
A reception confirmation signal receiving means for receiving a reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is a transmission partner of the reception confirmation signal. Data transmission means for transmitting data including the elapsed time from the time of occurrence of the transmission event to the time of data transmission;
Data confirmation signal receiving means for receiving a data confirmation signal transmitted from the other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means; Have
The wireless terminal serving as a relay device is:
Intermittently at a fixed period, and the wireless transmission circuit of the radio terminal to the operating state transmitting the beacon, in the operating state the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal An intermittent operation control means for receiving a transmission request transmitted from a first other wireless terminal located above the downlink communication path and capable of direct communication with the own wireless terminal ;
A transmission request receiving means for receiving a transmission request transmitted from the first other wireless terminal during an operation state of the wireless reception circuit of the own wireless terminal ;
When the transmission request receiving means receives the transmission request, a reception confirmation signal transmitting means for transmitting a reception confirmation signal to the first other wireless terminal by setting the wireless transmission circuit of its own wireless terminal to an operating state;
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Data receiving means for receiving data from the first other wireless terminal ;
Time correction means for correcting the own wireless terminal time based on the time correction information when the data is received;
When the data is received, a relay time measuring unit that starts a relay time measurement timer of the own wireless terminal to relay the data and measures a relay time in the own wireless terminal;
When receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, a second possible direct communication between a position to and the radio terminal to the lower of the downlink communication path than the radio terminal other waits to receive the state of the beacon from the radio terminal, when receiving the beacon in the period, the self above with a radio transmitter circuit to an operation state of the terminal device, the second other said a beacon source A transmission request transmission means for transmitting a transmission request to the wireless terminal of
A reception confirmation signal receiving means for receiving a reception confirmation signal from the second other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon Data transmission means for transmitting data including the elapsed time obtained by adding the elapsed time of
A data confirmation signal for receiving a data confirmation signal transmitted from the second other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means And a wireless communication network system.
収集装置となる前記無線端末は、
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有することを特徴とする収集装置となる無線端末。 A wireless transmission circuit for transmitting the data wirelessly, in a wireless communication network system including a plurality of wireless end end and a radio receiving circuit for receiving data transmitted by radio, the wireless communication network system may include one a wireless terminal as the One collection device, comprises a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device,
The wireless terminal serving as a collection device is:
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein A transmission request transmission means for transmitting a transmission request to the other wireless terminal that is the transmission source of the beacon;
A reception confirmation signal receiving means for receiving a reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is the transmission partner of the reception confirmation signal. Data transmission means for transmitting data including the elapsed time from the time of occurrence of the transmission event to the time of data transmission;
Data confirmation signal receiving means for receiving a data confirmation signal transmitted from the other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means; , A wireless terminal serving as a collection device.
中継装置となる前記無線端末は、
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にしてビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信できるようにする間欠動作制御手段と、
自無線端末の前記無線受信回路の動作状態中に前記第１の他の無線端末から送信された送信要求を受信する送信要求受信手段と、
該送信要求受信手段が前記送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信する受信確認信号送信手段と、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信するデータ受信手段と、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正する時刻補正手段と、
該データを受信した場合に、前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測する中継時間計測手段と、
該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信する受信確認信号受信手段と、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信するデータ送信手段と、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段と、を有することを特徴とする中継装置となる無線端末。 A wireless transmission circuit for transmitting the data wirelessly, in a wireless communication network system including a plurality of wireless end end and a radio receiving circuit for receiving data transmitted by radio, the wireless communication network system may include one a wireless terminal as the One collection device, comprises a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device,
The wireless terminal serving as a relay device is:
Intermittently at a fixed period, the own the radio terminal by the radio transmission circuit in an operating state send a bi bacon, and the operating state of the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal An intermittent operation control means for receiving a transmission request transmitted from a first other wireless terminal located above the downlink communication path and capable of direct communication with the own wireless terminal ;
A transmission request receiving means for receiving a transmission request transmitted from the first other wireless terminal during an operation state of the wireless reception circuit of the own wireless terminal ;
When the transmission request receiving means receives the transmission request, a reception confirmation signal transmitting means for transmitting a reception confirmation signal to the first other wireless terminal by setting the wireless transmission circuit of its own wireless terminal to an operating state;
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Data receiving means for receiving data from the first other wireless terminal ;
Time correction means for correcting the own wireless terminal time based on the time correction information when the data is received;
When the data is received, a relay time measuring unit that starts a relay time measurement timer of the own wireless terminal to relay the data and measures a relay time in the own wireless terminal;
When receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, a second possible direct communication between a position to and the radio terminal to the lower of the downlink communication path than the radio terminal other waits to receive the state of the beacon from the radio terminal, when receiving the beacon in the period, the radio terminal said by the radio transmission circuit to an operation state of said second other said a beacon source A transmission request transmission means for transmitting a transmission request to the wireless terminal of
A reception confirmation signal receiving means for receiving a reception confirmation signal from the second other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon Data transmission means for transmitting data including the elapsed time obtained by adding the elapsed time of
A data confirmation signal for receiving a data confirmation signal transmitted from the second other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means A wireless terminal serving as a relay device.
収集装置となる前記無線端末は、
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信し、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信し、
該受信確認信号を受信したら、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信し、
該データ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信し、
一方、中継装置となる前記無線端末は、
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にして前記ビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信し、
該送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信し、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信し、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正すると共に前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測し、さらに該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信して、前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信し、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信し、
該データ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信する時刻補正方法。 A wireless transmission circuit for transmitting the data wirelessly, in a wireless communication network system including a plurality of wireless end end and a radio receiving circuit for receiving data transmitted by radio, the radio terminal as the single collecting device When, a time correction method in a wireless communication network system comprising a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device,
The wireless terminal serving as a collection device is:
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein Send a transmission request to the other wireless terminal that is the source of the beacon,
Receiving the reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is a transmission partner of the reception confirmation signal. Send data containing the elapsed time from the time of the transmission event to the time of data transmission,
After the data transmission, the wireless reception circuit of its own wireless terminal is put into an operating state, and a data confirmation signal transmitted from the other wireless terminal that is the transmission partner of the data is received,
On the other hand, the wireless terminal as a relay device is
Intermittently at a fixed period, and the wireless transmission circuit of the radio terminal to the operating state transmitting the beacon, in the operating state the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal Also receives a transmission request transmitted from the first other wireless terminal located above the downlink communication path and capable of direct communication with the own wireless terminal ,
When the transmission request is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and a reception confirmation signal is transmitted to the first other wireless terminal,
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Receiving data from the first other wireless terminal ;
When receiving the data, measures a relay time in the radio terminal is allowed to the radio terminal starts a relay time measurement timer for relaying the data is corrected on the basis of the own wireless terminal time with the time correction information and, when further receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, capable of communicating directly between the position and and its own radio terminal to the lower of the downlink communication path than the radio terminal second waits to receive the state of the beacon from another wireless terminal such, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein the said is a beacon of sender sends a transmission request to the two other wireless terminals, receiving an acknowledgment signal from said second other wireless terminal which is the source of the beacon,
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon Send the data containing the elapsed time that is added to the elapsed time of
A time correction method for receiving a data confirmation signal transmitted from the second other wireless terminal that is a transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after the data transmission.
時刻補正情報を下り通信パケットに付加するための送信事象が発生すると、所定の期間、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記他の無線端末に送信要求を送信する送信要求送信手段、
該送信要求を受信した前記ビーコンの送信元である前記他の無線端末からの受信確認信号を受信する受信確認信号受信手段、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記他の無線端末に対して、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを送信するデータ送信手段、および、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段、として機能させる為のプログラム。 A wireless transmission circuit for transmitting the data wirelessly, in a wireless communication network system including a plurality of wireless end end and a radio receiving circuit for receiving data transmitted by radio, the radio terminal as the single collecting device And a computer of the wireless terminal that is a collection device in a wireless communication network system including a plurality of wireless terminals that are relay devices located in a downlink communication path from the wireless terminal that is the collection device,
When the transmission event for adding the time correction information to downlink communication packet is generated, the predetermined time period, and the radio receiving circuit of the radio terminal into operation, than the radio terminals located in the lower of the downlink communication path and it waits to receive the state of a beacon from another wireless terminal that can communicate directly between the own radio terminal, upon receiving the beacon in the period, by the radio transmission circuit of its own radio terminal into operation, wherein A transmission request transmission means for transmitting a transmission request to the other wireless terminal that is the transmission source of the beacon;
A reception confirmation signal receiving means for receiving a reception confirmation signal from the other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the transmission start time and the time correction information are transmitted to the other wireless terminal that is the transmission partner of the reception confirmation signal. A data transmission means for transmitting data including the elapsed time from the time of occurrence of the transmission event to the time of data transmission; and
A data confirmation signal receiving means for receiving a data confirmation signal transmitted from the other wireless terminal which is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal in an operating state after data transmission by the data transmission means; Program to function as.
一定周期で間欠的に、自無線端末の前記無線送信回路を動作状態にして前記ビーコンを送信し、前記ビーコンを送信した後に自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の上位に位置し且つ自無線端末との間で直接通信可能な第１の他の無線端末から送信される送信要求を受信できるようにする間欠動作制御手段、
自無線端末の前記無線受信回路の動作状態中に前記第１の他の無線端末から送信された送信要求を受信する送信要求受信手段、
該送信要求受信手段が前記送信要求を受信したら、自無線端末の前記無線送信回路を動作状態にして前記第１の他の無線端末に受信確認信号を送信する受信確認信号送信手段、
該受信確認信号を送信した場合に、自無線端末の前記無線受信回路を動作状態にして、前記時刻補正情報として送信開始時刻と前記送信事象の発生時点からデータ送信時点までの経過時間を内包するデータを前記第１の他の無線端末から受信するデータ受信手段、
該データを受信した場合に、自無線端末時刻を前記時刻補正情報に基づいて補正する時刻補正手段、
該データを受信した場合に、前記データを中継するために自無線端末の中継時間計測タイマをスタートさせて自無線端末における中継時間を計測する中継時間計測手段と、
該データを受信した場合に、自無線端末の前記無線受信回路を動作状態にして、自無線端末よりも前記下り通信経路の下位に位置し且つ自無線端末との間で直接通信可能な第２の他の無線端末からのビーコンの受信待ち状態となり、該期間中に前記ビーコンを受信すると、自無線端末の前記無線送信回路を動作状態にして、前記ビーコンの送信元である前記第２の他の無線端末に送信要求を送信する送信要求送信手段と、
該送信要求を受信した前記ビーコンの送信元である前記第２の他の無線端末からの受信確認信号を受信する受信確認信号受信手段、
該受信確認信号を受信すると、自無線端末の前記無線送信回路を動作状態にして、前記受信確認信号の送信相手である前記第２の他の無線端末に対して、前記時刻補正情報として、前記収集装置となる前記無線端末が設定した送信開始時刻と前記データの受信時点から前記ビーコンの送信元である前記第２の他の無線端末に対するデータ送信時点までの経過時間と前記データを受信した時点の経過時間とを加算した経過時間を内包するデータを送信するデータ送信手段、および、
該データ送信手段によるデータ送信後に自無線端末の前記無線受信回路を動作状態にして、前記データの送信相手である前記第２の他の無線端末から送信されるデータ確認信号を受信するデータ確認信号受信手段、として機能させる為のプログラム。 A wireless transmission circuit for transmitting the data wirelessly, in a wireless communication network system including a plurality of wireless end end and a radio receiving circuit for receiving data transmitted by radio, the radio terminal as the single collecting device When the computer of the wireless terminal as the relay apparatus in a wireless communication network system comprising a wireless terminal comprising a plurality of relay devices located downstream communication path from the wireless terminal as the the collection device,
Intermittently at a fixed period, and the wireless transmission circuit of the radio terminal to the operating state transmitting the beacon, in the operating state the radio receiving circuit of the radio terminal after transmitting the beacon, from the radio terminal Intermittent operation control means for receiving a transmission request transmitted from a first other wireless terminal that is located above the downlink communication path and can communicate directly with the own wireless terminal ,
A transmission request receiving means for receiving a transmission request transmitted from the first other wireless terminal during an operation state of the wireless reception circuit of the own wireless terminal ;
A reception confirmation signal transmission means for transmitting a reception confirmation signal to the first other wireless terminal by setting the wireless transmission circuit of its own wireless terminal in an operating state when the transmission request receiving means receives the transmission request;
When the reception confirmation signal is transmitted, the wireless reception circuit of the own wireless terminal is put into an operation state, and the transmission correction time includes the transmission start time and the elapsed time from the occurrence of the transmission event to the data transmission time. Data receiving means for receiving data from the first other wireless terminal ;
Time correction means for correcting the time of the own wireless terminal based on the time correction information when the data is received;
When the data is received, a relay time measuring unit that starts a relay time measurement timer of the own wireless terminal to relay the data and measures a relay time in the own wireless terminal;
When receiving the data, the self above with the wireless receiver circuit to an operation state of the wireless terminal, a second possible direct communication between a position to and the radio terminal to the lower of the downlink communication path than the radio terminal other waits to receive the state of the beacon from the radio terminal, when receiving the beacon in the period, the radio terminal said by the radio transmission circuit to an operation state of said second other said a beacon source A transmission request transmission means for transmitting a transmission request to the wireless terminal of
A reception confirmation signal receiving means for receiving a reception confirmation signal from the second other wireless terminal that is the transmission source of the beacon that has received the transmission request;
When the reception confirmation signal is received, the wireless transmission circuit of the own wireless terminal is set in an operating state, and the second other wireless terminal that is the transmission partner of the reception confirmation signal is used as the time correction information . time when the transmission start time the wireless terminal set to a collecting device from the reception time of the data received the data and the elapsed time until the data transmission time for the second other wireless terminal which is the source of the beacon A data transmission means for transmitting data including an elapsed time obtained by adding the elapsed time of
A data confirmation signal for receiving a data confirmation signal transmitted from the second other wireless terminal that is the transmission partner of the data by setting the wireless reception circuit of the own wireless terminal to an operating state after data transmission by the data transmission means A program for functioning as a receiving means.
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