JP2005006207A - Radio network connecting method and master unit of radio network connection system - Google Patents

Radio network connecting method and master unit of radio network connection system Download PDF

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JP2005006207A
JP2005006207A JP2003169863A JP2003169863A JP2005006207A JP 2005006207 A JP2005006207 A JP 2005006207A JP 2003169863 A JP2003169863 A JP 2003169863A JP 2003169863 A JP2003169863 A JP 2003169863A JP 2005006207 A JP2005006207 A JP 2005006207A
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connection request
connection
unit
state
response signal
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Yoshimichi Kishine
桂路 岸根
Kenji Kawai
健治 川合
Akiko Oteru
晶子 大輝
Kazuhiko Terada
和彦 寺田
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Nippon Telegraph and Telephone Corp
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Nippon Telegraph and Telephone Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

<P>PROBLEM TO BE SOLVED: To shorten a time required for connection establishment at the time of radio connection about a radio network connecting method and a master unit of a radio network connection system when a slave unit such as a portable information terminal which is operated by a battery power source, can be carried and moved and which performs radio data communication such as radio LAN communication performs radio data communication with the master unit connected to a wired network such as Ethernet (R). <P>SOLUTION: In a slave unit's connection requesting state (state 2 in the figure), the slave unit receives a connection request response signal from the master unit within a period between the point of time of shift to the connection requesting state and the elapse of a prescribed time, measures and stores the receiving power of each connection request response signal (state 3 in the figure), stops the connection requesting state at the point of time when the prescribed time Taw elapses after the shift to the connection requesting state (state 4 in the figure), selects the master unit to connect on the basis of the stored power of the connection request response signal (state 5 in the figure) and starts connection with the master unit (state 6 in the figure). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、電池電源で動作し携帯して移動することが可能な、無線ＬＡＮ通信等の無線データ通信を行う、携帯情報端末等の子機が、イーサネット（登録商標）等の有線ネットワークに接続された親機と無線データ通信を行うときの、無線ネットワーク接続方法及び無線ネットワーク接続システムの親機に関する。
【０００２】
【従来の技術】
従来のこの種のシステムとしてコードレス電話装置がある（例えば、特許文献１参照。）。特許文献１には、複数の親機に登録できる子機で、親機とリンクを確立する際、優先順位に従って親機を選択するコードレス電話装置が記載されている。
【０００３】
【特許文献１】
特開平９−３３１５７５号公報
【０００４】
【発明が解決しようとする課題】
上述した従来のコードレス電話装置では、親機−子機間通信における接続開始時において、子機に登録された接続親機の優先順位に基づき、優先順位の高い親機から順にチャネルをスキャンし、当該親機情報が取得された場合に、親機との接続を開始する。
【０００５】
この方法により、子機は、最初に受け取った当該親機情報が検知されない場合、次に優先順位の高い親機のチャネルをスキャンするため、子機は、親機の情報を検知するまで、チャネルを切り替えスキャンする必要があり、優先順位の高い親機情報が検知されない場合、親機との接続確立までに要する時間が長くなり、またそのために消費電力が増大するという問題があった。
【０００６】
本発明はこのような事情に鑑みてなされたものであり、無線接続する際の接続確立に要する時間の短縮を図った無線ネットワーク接続方法及び無線ネットワーク接続システムの親機を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記目的を達成するために請求項１に記載の発明は、複数の親機がネットワークに接続され、子機と前記複数の親機のうちの１つの親機との間で無線によるデータ伝送を行うとともに、子機が親機を介してネットワークにアクセス可能に構成された無線ネットワーク接続方法において、子機が前記複数の親機に対して無線接続を要求する接続要求信号をブロードキャストし、前記接続要求信号を受信した親機は、前記子機に対して接続要求信号に対する応答信号である接続要求応答信号を出力し、前記子機は、前記接続要求信号をブロードキャストした時点から所定時間内に前記接続要求応答信号を受信した場合には、該接続要求応答信号を送信した何れか１つの親機との接続を開始することを特徴とする。
【０００８】
また、請求項２に記載の発明は、請求項１に記載の無線ネットワーク接続方法において、前記子機は、無線通信が行われない状態を確認した場合は、親機への接続を要求する接続要求信号を複数の親機にブロードキャストし、親機からの接続要求応答信号の受信を待つ、接続要求状態に遷移し、この時点から前記接続要求応答信号が受信されずに所定時間が経過した場合には、必要最小限の機能部のみに電源供給が行われるパワーダウン状態に遷移するとともに、該接続要求状態に遷移した時点から所定時間経過した時点で接続要求状態を終了し、接続要求状態にある時間内に接続要求応答信号を受信した親機の中の１つの親機との接続を開始することを特徴とする。
【０００９】
また、請求項３に記載の発明は、請求項１または２のいずれかに記載の無線ネットワーク接続方法において、前記子機は、無線通信が行われていることを検知した場合には、必要最小限の機能部のみに電源供給が行われるパワーダウン状態に遷移し、この状態を所定時間だけ継続させることを特徴とする。
【００１０】
また、請求項４に記載の発明は、請求項１乃至３のいずれかに記載の無線ネットワーク接続方法において、前記子機は、前記接続要求状態に遷移した時点から所定時間が経過するまでに親機から受信した各接続要求応答信号のパワーを測定・記憶し、接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、前記記憶した接続要求応答信号パワーに基づき、最も受信パワーの大きい接続要求応答信号を送出した親機と接続を開始することを特徴とする。
【００１１】
また、請求項５に記載の発明は、請求項１乃至３のいずれかに記載の無線ネットワーク接続方法において、前記子機は、接続する親機の優先順位データベースを有し、接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、優先順位データベースに基づき、前記接続要求状態に遷移した時点から所定時間が経過するまでに接続要求応答信号を受信した親機の中で、優先順位の高い親機と接続を開始することを特徴とする。
【００１２】
また、請求項６に記載の発明は、請求項１乃至３のいずれかに記載の無線ネットワーク接続方法において、前記子機は、前記接続要求状態に遷移した時点から所定時間が経過するまでに親機から受信した各接続要求応答信号のエラーレートを測定・記憶し、接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、前記記憶したエラーレートに基づき、最もエラーレートの小さい接続要求応答信号を送出した親機と接続を開始することを特徴とする。
【００１３】
また、請求項７に記載の発明は、複数の親機がネットワークに接続され、子機と前記複数の親機のうちの１つの親機との間で無線によるデータ伝送を行うとともに、子機が親機を介してネットワークにアクセス可能に構成された無線ネットワーク接続システムの親機において、無線信号の送受信を行う無線部と、親機のリンク動作を制御するリンク動作制御部と、前記無線部から入力された受信無線信号のうち、接続中の子機からの受信無線データ信号に対して、無線データ信号処理を施し、受信データ信号としてネットワークインタフェース部に出力し、ネットワークインタフェース部から入力された接続中の子機への送信データ信号に対して、無線データ信号処理を施し、送信無線信号として無線部に出力する無線信号処理部と、ネットワークから入力された、接続中の子機への送信データ信号を無線信号処理部に出力し、無線信号処理部から受信データ信号を入力し、ネットワークに送信するネットワークインタフェース部とを有することを特徴とする。
【００１４】
【発明の実施の形態】
以下、本発明の実施形態を、図面を参照して詳細に説明する。
図１に本発明の実施形態に係る無線ネットワーク接続システムにおける子機と親機との無線接続時の動作タイミングチャートを示す。本発明の実施形態に係る無線ネットワーク接続システムは、複数の親機がネットワークに接続され、子機と前記複数の親機のうちの１つの親機との間で無線によるデータ伝送を行うとともに、子機が親機を介してネットワークにアクセス可能に構成されている。
【００１５】
同図に示すように、子機が親機とのデータ通信が許可されていない未接続状態では、子機では、キャリアセンスを時間Ｔｃｓだけ行い、その後親機に対して接続要求信号をブロードキャストする。
各親機１〜３では、同時に子機からの接続要求信号を受信し、それぞれ、接続要求信号の受信時点から時間Ｔｄ１，Ｔｄ２、Ｔｄ３がそれぞれ，経過した時点で接続要求応答信号１〜３を送信する。
【００１６】
子機は、親機１〜３より接続要求応答信号１〜３を受信し、これらの親機１〜３のうちの１つの親機と接続を開始する。なお、本実施形態に係る無線ネットワーク接続システムでは、子機が親機とのデータ通信が許可されていない未接続状態と、親機とのデータ通信が許可されている接続状態とを有している。
【００１７】
次に、本発明の第１実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを図２に示す。
第１実施形態に係る無線ネットワーク接続システムでは、子機が前記複数の親機に対して無線接続を要求する接続要求信号をブロードキャストし、前記接続要求信号を受信した親機は、前記子機に対して接続要求信号に対する応答信号である接続要求応答信号を出力し、前記子機は、前記接続要求信号をブロードキャストした時点から所定時間内に前記接続要求応答信号を受信した場合には、該接続要求応答信号を送信した何れか１つの親機との接続を開始することを特徴としている。
【００１８】
図２において、子機が、無線通信が行われていないかどうかを検知し（図２：状態０）、無線通信が行われている状態を検知した場合には、ランダムな時間Ｔｄａだけ子機における必要最小限の機能部にのみ電源供給が行われるパワーダウン状態に遷移し（図２：状態６）、無線通信が行われていないことを確認した場合には、子機情報を含み親機への接続を要求する接続要求信号を親機に送信する（図２：状態１）。
【００１９】
接続要求信号を親機に送信した後、親機からの接続要求応答信号の受信を待つ接続要求状態に遷移し（図２：状態２）、
接続要求応答信号が受信されずに所定時間Ｔａｗが経過した場合、パワーダウン状態に遷移する（図２：状態７）。
予め定められた最小パワーダウン時間Ｔｐｄｍｉｎ２から予め定められた最大パワーダウン時間Ｔｐｄｍａｘ２（Ｔｐｄｍａｘ２＞Ｔｐｄｍｉｎ２）の範囲内でランダムな時間Ｔｄａ２だけパワーダウン状態を継続し、その後、状態０に遷移する。
【００２０】
接続要求状態に遷移してから所定時間Ｔａｗが経過した時点で、接続要求状態を終了し（図２：状態４）、接続要求応答信号を受信した親機の中の、１つの親機との接続を開始する（図２：状態５）。
【００２１】
次に、本発明の第２実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを図３に示す。本実施形態では、子機は、接続要求状態に遷移した時点から所定時間が経過するまでに親機から受信した各接続要求応答信号のパワーを測定・記憶し、接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、前記記憶した接続要求応答信号パワーに基づき、最も受信パワーの大きい接続要求応答信号を送出した親機と接続を開始することを特徴としている。
【００２２】
本発明の第１実施形態における子機の接続要求状態において（図３：状態２）、 子機が、接続要求状態に遷移した時点から所定時間が経過するまでの期間内に、親機からの接続要求応答信号を受信し、各接続要求応答信号の受信パワーを測定、記憶し（図３：状態３）、接続要求状態に遷移してから所定時間Ｔａｗが経過した時点で、接続要求状態を終了し（図３：状態４）、記憶した接続要求応答信号のパワーに基づき接続する親機を選択し（図３：状態５）、当該親機と接続を開始する（図３：状態６）。
【００２３】
次に、本発明の第３実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを図４に示す。本実施形態では、子機は、接続する親機の優先順位データベースを有し、接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、優先順位データベースに基づき、前記接続要求状態に遷移した時点から所定時間が経過するまでに接続要求応答信号を受信した親機の中で、優先順位の高い親機と接続を開始することを特徴としている。
【００２４】
本発明の第１実施形態において子機が、未接続状態において、接続する親機の優先順位データベースを有し、接続要求状態に遷移してから所定時間Ｔａｗが経過した時点で接続要求状態を終了する（図４：状態２〜４）。
次いで、優先順位データベースに基づき、接続要求状態に遷移してから所定時間Ｔａｗが経過するまでの期間内に接続要求応答信号を受信した親機の中で優先順位の高い親機を選択し（図４：状態５）、接続を開始する（図４：状態６）。
【００２５】
次に、本発明の第４実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを図５に示す。本実施形態では、子機は、前記接続要求状態に遷移した時点から所定時間が経過するまでに親機から受信した各接続要求応答信号のエラーレートを測定・記憶し、接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、前記記憶したエラーレートに基づき、最もエラーレートの小さい接続要求応答信号を送出した親機と接続を開始することを特徴としている。
【００２６】
本発明の第１実施形態における子機の接続要求状態において（図５：状態２）、
子機が、接続要求状態に遷移してから所定時間Ｔａｗが経過するまでの期間内に受信した各接続要求応答信号のエラーレートを測定・記憶し（図５：状態３）、接続要求状態に遷移してから所定時間Ｔａｗが経過した時点で、接続要求状態を終了し（図５：状態４）、記憶した各接続要求応答信号のエラーレートに基づき記憶した、最もエラーレートの小さい接続要求応答信号を送出した親機を選択し（図５：状態５）、当該親機と接続を開始する（図５：状態６）、
【００２７】
次に、本発明の実施形態に係る無線ネットワーク接続システムの親機の構成を図６に示す。この親機は、第１〜第４実施形態を実施するために使用される無線ネットワーク接続システムの親機である。同図において、本実施形態に係る無線ネットワーク接続システムの親機は、イーサネット（登録商標）等の有線のネットワーク１００に接続されており、無線部１０と、リンク動作制御部１２と、無線信号処理部１４と、ネットワークインタフェース部１６とを有している。
【００２８】
本実施形態に係る無線ネットワーク接続システムでは、複数の親機がネットワークに接続され、子機と前記複数の親機のうちの１つの親機との間で無線によるデータ伝送を行うとともに、子機が親機を介してネットワークにアクセス可能に構成されている。
無線部１０は、無線信号の送受信を行う機能を有している。
リンク動作制御部１２は、親機のリンク動作を制御する機能を有する。
【００２９】
無線信号処理部１４は、前記無線部から入力された受信無線信号のうち、接続中の子機からの受信無線データ信号に対して、無線データ信号処理を施し、受信データ信号としてネットワークインタフェース部１６に出力し、ネットワークインタフェース部１６から入力された接続中の子機への送信データ信号に対して、無線データ信号処理を施し、信無線信号として無線部１０に出力する機能を有する。
【００３０】
ネットワークインタフェース部１６は、ネットワーク１００から入力された、接続中の子機への送信データ信号を無線信号処理部１４に出力し、無線信号処理部１４から受信データ信号を入力し、ネットワーク１００に送信する機能を有する。
【００３１】
【発明の効果】
以上説明したように、請求項１乃至７に係る本発明によれば、
接続開始にあたり、子機が複数の親機に対し、接続要求信号をブロードキャストし、親機からの接続要求応答信号をある一定の時間内に受信するために、受信可能な親機が一定時間内に検知可能で、接続までの時間が大幅に短縮できる。
【００３２】
さらに請求項４に係る発明によれば、受信パワーの大きい親機と接続するため、
より障害の少ない通信が可能となる。
また、請求項５に係る発明によれば、接続優先度の高い親機を、あらかじめ任意に設定可能で、より柔軟なワイヤレスネットワークの構築が可能となる。
さらに、請求項６に係る発明によれば、最もエラーレートの小さい親機と接続するために、通信品質の向上が図れる。
【図面の簡単な説明】
【図１】本発明の実施形態に係る無線ネットワーク接続システムにおける子機と親機との無線接続時の動作状態を示すタイミングチャート。
【図２】本発明の第１実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを示す図。
【図３】本発明の第２実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを示す図。
【図４】本発明の第３実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを示す図。
【図５】本発明の第４実施形態に係る無線ネットワーク接続システムの子機と親機との接続シーケンスを示す図。
【図６】本発明の実施形態に係る無線ネットワーク接続システムの親機の構成を示すブロック図。
【符号の説明】
１０…無線部
１２…リンク動作制御部
１４…無線信号処理部
１６…ネットワークインタフェース部
１００…ネットワーク[0001]
BACKGROUND OF THE INVENTION
In the present invention, a handset such as a portable information terminal that operates on a battery power source and can be carried and moved and wireless data communication such as wireless LAN communication is connected to a wired network such as Ethernet (registered trademark). The present invention relates to a wireless network connection method and a parent device of a wireless network connection system when performing wireless data communication with a parent device.
[0002]
[Prior art]
As a conventional system of this type, there is a cordless telephone device (for example, see Patent Document 1). Patent Document 1 describes a cordless telephone device that is a slave unit that can be registered with a plurality of master units and selects a master unit according to priority when establishing a link with the master unit.
[0003]
[Patent Document 1]
JP-A-9-331575 [0004]
[Problems to be solved by the invention]
In the conventional cordless telephone device described above, at the start of connection in the communication between the parent device and the child device, the channels are scanned in order from the parent device having the highest priority based on the priority order of the connecting parent device registered in the child device, When the parent device information is acquired, connection with the parent device is started.
[0005]
By this method, if the parent device information received first is not detected, the child device scans the channel of the parent device having the next highest priority. When the parent device information having a high priority is not detected, it takes a long time to establish a connection with the parent device, which increases the power consumption.
[0006]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a wireless network connection method and a base unit of a wireless network connection system that reduce the time required for establishing a connection when wirelessly connecting. To do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a plurality of master units are connected to a network, and wireless data transmission is performed between a slave unit and one of the plurality of master units. And performing a connection request signal for requesting a wireless connection to the plurality of parent devices in the wireless network connection method configured such that the child device can access the network via the parent device, and the connection The master unit that has received the request signal outputs a connection request response signal that is a response signal to the connection request signal to the slave unit, and the slave unit transmits the connection request signal within a predetermined time from the point in time of broadcasting. When a connection request response signal is received, the connection with any one parent device that has transmitted the connection request response signal is started.
[0008]
The invention according to claim 2 is the wireless network connection method according to claim 1, wherein the slave unit requests connection to the master unit when it is confirmed that wireless communication is not performed. When a request signal is broadcast to a plurality of master units, waiting for reception of a connection request response signal from the master unit, transitioning to a connection request state, and a predetermined time elapses without receiving the connection request response signal from this point In the power-down state in which power is supplied only to the minimum necessary functional units, and the connection request state is terminated when a predetermined time has elapsed since the transition to the connection request state. It is characterized in that the connection with one of the parent devices that have received the connection request response signal within a certain time is started.
[0009]
Further, the invention according to claim 3 is the wireless network connection method according to claim 1 or 2, wherein when the slave unit detects that wireless communication is being performed, the minimum required A transition is made to a power-down state in which power is supplied only to a limited number of functional units, and this state is continued for a predetermined time.
[0010]
According to a fourth aspect of the present invention, there is provided the wireless network connection method according to any one of the first to third aspects, wherein the slave unit is connected to the parent device before a predetermined time elapses from the time when the state is changed to the connection request state. The power of each connection request response signal received from the machine is measured and stored, and when a predetermined time has elapsed since the transition to the connection request state, the connection request state is terminated and based on the stored connection request response signal power. The connection is started with the base unit that has transmitted the connection request response signal with the highest received power.
[0011]
Further, the invention according to claim 5 is the wireless network connection method according to any one of claims 1 to 3, wherein the slave unit has a priority database of a master unit to be connected, and transitions to a connection request state. When the predetermined time has elapsed, the connection request state is terminated, and based on the priority order database, the master unit that has received the connection request response signal until the predetermined time has elapsed since the transition to the connection request state. Among them, it is characterized by starting a connection with a parent device having a high priority.
[0012]
Further, the invention according to claim 6 is the wireless network connection method according to any one of claims 1 to 3, wherein the slave unit is connected to a parent device before a predetermined time elapses from the time when the connection request state is entered. The error rate of each connection request response signal received from the machine is measured and stored, and when the predetermined time has elapsed since the transition to the connection request state, the connection request state is terminated, and based on the stored error rate, A connection is started with a base unit that has transmitted a connection request response signal with a low error rate.
[0013]
According to a seventh aspect of the present invention, a plurality of master units are connected to a network, wireless data transmission is performed between the slave unit and one of the plurality of master units, and the slave unit In a base unit of a wireless network connection system configured to be accessible to a network via the base unit, a radio unit that transmits and receives radio signals, a link operation control unit that controls link operation of the base unit, and the radio unit Radio data signal processing is performed on the received radio data signal from the connected slave unit among the received radio signals input from, and output to the network interface unit as the received data signal, and input from the network interface unit A wireless signal processing unit that performs wireless data signal processing on the transmission data signal to the connected slave unit and outputs the transmission data signal to the wireless unit; and a network A network interface unit that outputs a transmission data signal input from the network to the connected slave unit to the radio signal processing unit, inputs a reception data signal from the radio signal processing unit, and transmits the received data signal to the network. Features.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an operation timing chart at the time of wireless connection between a slave unit and a master unit in a wireless network connection system according to an embodiment of the present invention. In a wireless network connection system according to an embodiment of the present invention, a plurality of parent devices are connected to a network, and wireless data transmission is performed between a child device and one parent device of the plurality of parent devices, The slave unit is configured to be accessible to the network via the master unit.
[0015]
As shown in the figure, in a non-connected state in which the slave unit is not permitted to perform data communication with the master unit, the slave unit performs carrier sense for a time Tcs and then broadcasts a connection request signal to the master unit. .
Each of the parent devices 1 to 3 receives the connection request signal from the child device at the same time, and receives the connection request response signals 1 to 3 when the times Td1, Td2, and Td3 have elapsed from the time when the connection request signal was received, respectively. Send.
[0016]
The slave unit receives connection request response signals 1 to 3 from the master units 1 to 3 and starts connection with one of the master units 1 to 3. Note that the wireless network connection system according to the present embodiment has an unconnected state in which the child device is not permitted to perform data communication with the parent device, and a connected state in which data communication with the parent device is permitted. Yes.
[0017]
Next, FIG. 2 shows a connection sequence between the slave unit and the master unit of the wireless network connection system according to the first embodiment of the present invention.
In the wireless network connection system according to the first embodiment, the slave unit broadcasts a connection request signal for requesting a wireless connection to the plurality of master units, and the master unit that has received the connection request signal transmits the connection request signal to the slave unit. A connection request response signal that is a response signal to the connection request signal is output, and when the slave unit receives the connection request response signal within a predetermined time from when the connection request signal is broadcast, The connection is started with any one of the parent devices that transmitted the request response signal.
[0018]
In FIG. 2, when the slave unit detects whether or not wireless communication is performed (FIG. 2: state 0), and detects the state where wireless communication is performed, the slave unit is set for a random time Tda. Transition to a power-down state in which power is supplied only to the minimum necessary functional units in FIG. 2 (FIG. 2: state 6), and confirming that wireless communication is not being performed, A connection request signal for requesting connection to is transmitted to the parent device (FIG. 2: state 1).
[0019]
After transmitting the connection request signal to the parent device, the state transits to a connection request state waiting for reception of a connection request response signal from the parent device (FIG. 2: state 2).
When the predetermined time Taw elapses without receiving the connection request response signal, a transition is made to the power-down state (FIG. 2: state 7).
The power-down state is continued for a random time Tda2 within a range from a predetermined minimum power-down time Tpdmin2 to a predetermined maximum power-down time Tpdmax2 (Tpdmax2> Tpdmin2).
[0020]
When a predetermined time Taw elapses after the transition to the connection request state, the connection request state is terminated (FIG. 2: state 4), and one of the parent units that received the connection request response signal Connection is started (FIG. 2: state 5).
[0021]
Next, FIG. 3 shows a connection sequence between the slave unit and the master unit of the wireless network connection system according to the second embodiment of the present invention. In this embodiment, the slave unit measures and stores the power of each connection request response signal received from the master unit until a predetermined time elapses after the transition to the connection request state, and after transitioning to the connection request state When a predetermined time has elapsed, the connection request state is terminated, and based on the stored connection request response signal power, connection is started with the parent device that has transmitted the connection request response signal with the highest reception power. .
[0022]
In the connection request state of the slave unit in the first embodiment of the present invention (FIG. 3: state 2), the slave unit receives a request from the master unit within a period until a predetermined time elapses after the slave unit transitions to the connection request state. The connection request response signal is received, and the reception power of each connection request response signal is measured and stored (FIG. 3: state 3). When a predetermined time Taw has elapsed since the transition to the connection request state, the connection request state is changed. End (FIG. 3: State 4), select a parent device to be connected based on the stored power of the connection request response signal (FIG. 3: State 5), and start connection with the parent device (FIG. 3: State 6) .
[0023]
Next, FIG. 4 shows a connection sequence between the slave unit and the master unit of the wireless network connection system according to the third embodiment of the present invention. In the present embodiment, the slave unit has a priority database of the master unit to be connected, and when the predetermined time has elapsed since the transition to the connection request state, the slave unit ends the connection request state, and based on the priority database, A connection is started with a parent device having a higher priority among the parent devices that have received a connection request response signal until a predetermined time elapses after the transition to the connection request state.
[0024]
In the first embodiment of the present invention, the slave unit has a priority database of the master unit to be connected in the unconnected state, and ends the connection request state when a predetermined time Taw elapses after transitioning to the connection request state. (FIG. 4: states 2 to 4).
Next, based on the priority database, a parent device having a higher priority is selected from the parent devices that have received the connection request response signal within a period from when the state transitions to the connection request state until a predetermined time Taw elapses (see FIG. 4: State 5), connection is started (FIG. 4: state 6).
[0025]
Next, FIG. 5 shows a connection sequence between the slave unit and the master unit of the wireless network connection system according to the fourth embodiment of the present invention. In this embodiment, the slave unit measures and stores the error rate of each connection request response signal received from the master unit until a predetermined time elapses after the transition to the connection request state, and transitions to the connection request state. When a predetermined time elapses, the connection request state is terminated, and based on the stored error rate, connection is started with the parent device that has transmitted the connection request response signal with the lowest error rate.
[0026]
In the connection request state of the slave unit in the first embodiment of the present invention (FIG. 5: state 2),
The slave unit measures and stores the error rate of each connection request response signal received within a period from when the slave unit transitions to the connection request state until a predetermined time Taw elapses (FIG. 5: state 3), and enters the connection request state. When a predetermined time Taw has elapsed since the transition, the connection request state is terminated (FIG. 5: state 4), and the connection request response with the lowest error rate stored based on the error rate of each stored connection request response signal. Select the parent device that sent the signal (FIG. 5: state 5), and start connection with the parent device (FIG. 5: state 6).
[0027]
Next, FIG. 6 shows the configuration of the master unit of the wireless network connection system according to the embodiment of the present invention. This parent device is a parent device of a wireless network connection system used to implement the first to fourth embodiments. In the figure, the base unit of the wireless network connection system according to the present embodiment is connected to a wired network 100 such as Ethernet (registered trademark), and includes a wireless unit 10, a link operation control unit 12, and wireless signal processing. Section 14 and a network interface section 16.
[0028]
In the wireless network connection system according to the present embodiment, a plurality of parent devices are connected to a network, wireless data transmission is performed between the child device and one of the plurality of parent devices, and the child device Is configured to be accessible to the network via the parent device.
The wireless unit 10 has a function of transmitting and receiving wireless signals.
The link operation control unit 12 has a function of controlling the link operation of the parent device.
[0029]
The radio signal processing unit 14 performs radio data signal processing on the received radio data signal from the connected slave unit among the received radio signals input from the radio unit, and the network interface unit 16 as a received data signal. The transmission data signal to the connected slave unit input from the network interface unit 16 is subjected to radio data signal processing and output to the radio unit 10 as a radio signal.
[0030]
The network interface unit 16 outputs a transmission data signal input from the network 100 to the connected slave unit to the wireless signal processing unit 14, inputs a reception data signal from the wireless signal processing unit 14, and transmits it to the network 100. It has the function to do.
[0031]
【The invention's effect】
As described above, according to the present invention according to claims 1 to 7,
When a connection is started, the slave unit broadcasts a connection request signal to a plurality of master units and receives a connection request response signal from the master unit within a certain period of time. Can be detected quickly, and the time to connection can be greatly reduced.
[0032]
Furthermore, according to the invention which concerns on Claim 4, in order to connect with the main | base station with large receiving power,
Communication with fewer failures is possible.
According to the fifth aspect of the present invention, a parent device having a high connection priority can be arbitrarily set in advance, and a more flexible wireless network can be constructed.
Furthermore, according to the invention which concerns on Claim 6, since it connects with the main | base station with the lowest error rate, the improvement of communication quality can be aimed at.
[Brief description of the drawings]
FIG. 1 is a timing chart showing an operation state at the time of wireless connection between a slave unit and a master unit in a wireless network connection system according to an embodiment of the present invention.
FIG. 2 is a diagram showing a connection sequence between a slave unit and a master unit of the wireless network connection system according to the first embodiment of the present invention.
FIG. 3 is a diagram showing a connection sequence between a slave unit and a master unit of a wireless network connection system according to a second embodiment of the present invention.
FIG. 4 is a diagram showing a connection sequence between a slave unit and a master unit of a wireless network connection system according to a third embodiment of the present invention.
FIG. 5 is a diagram showing a connection sequence between a slave unit and a master unit of a wireless network connection system according to a fourth embodiment of the present invention.
FIG. 6 is a block diagram showing a configuration of a base unit of the wireless network connection system according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Radio | wireless part 12 ... Link operation control part 14 ... Radio signal processing part 16 ... Network interface part 100 ... Network

Claims (7)

複数の親機がネットワークに接続され、子機と前記複数の親機のうちの１つの親機との間で無線によるデータ伝送を行うとともに、子機が親機を介してネットワークにアクセス可能に構成された無線ネットワーク接続方法において、
子機が前記複数の親機に対して無線接続を要求する接続要求信号をブロードキャストし、
前記接続要求信号を受信した親機は、前記子機に対して接続要求信号に対する応答信号である接続要求応答信号を出力し、
前記子機は、前記接続要求信号をブロードキャストした時点から所定時間内に前記接続要求応答信号を受信した場合には、該接続要求応答信号を送信した何れか１つの親機との接続を開始することを特徴とする無線ネットワーク接続方法。Multiple master units are connected to the network, wireless data transmission is performed between the slave unit and one of the master units, and the slave unit can access the network via the master unit In the configured wireless network connection method,
A slave unit broadcasts a connection request signal requesting a wireless connection to the plurality of master units,
The master unit that has received the connection request signal outputs a connection request response signal that is a response signal to the connection request signal to the slave unit,
When the slave unit receives the connection request response signal within a predetermined time from when the connection request signal is broadcast, the slave unit starts connection with any one of the master units that transmitted the connection request response signal. A wireless network connection method. 前記子機は、
無線通信が行われない状態を確認した場合は、親機への接続を要求する接続要求信号を複数の親機にブロードキャストし、親機からの接続要求応答信号の受信を待つ、接続要求状態に遷移し、この時点から前記接続要求応答信号が受信されずに所定時間が経過した場合には、必要最小限の機能部のみに電源供給が行われるパワーダウン状態に遷移するとともに、
該接続要求状態に遷移した時点から所定時間経過した時点で接続要求状態を終了し、接続要求状態にある時間内に接続要求応答信号を受信した親機の中の１つの親機との接続を開始することを特徴とする請求項１に記載の無線ネットワーク接続方法。The slave is
When it is confirmed that wireless communication is not performed, a connection request signal for requesting connection to the parent device is broadcast to a plurality of parent devices, and a connection request response signal is received from the parent device. When a predetermined time has passed without receiving the connection request response signal from this point, the state transitions to a power-down state in which power is supplied only to the minimum necessary function unit,
The connection request state is terminated when a predetermined time has elapsed since the transition to the connection request state, and the connection with one of the parent units that received the connection request response signal within the time in the connection request state is established. The wireless network connection method according to claim 1, wherein the wireless network connection method is started. 前記子機は、
無線通信が行われていることを検知した場合には、
必要最小限の機能部のみに電源供給が行われるパワーダウン状態に遷移し、この状態を所定時間だけ継続させることを特徴とする請求項１または２のいずれかに記載の無線ネットワーク接続方法。The slave is
If it detects that wireless communication is taking place,
3. The wireless network connection method according to claim 1, wherein a transition is made to a power-down state in which power is supplied only to a minimum necessary function unit, and this state is continued for a predetermined time. 前記子機は、
前記接続要求状態に遷移した時点から所定時間が経過するまでに親機から受信した各接続要求応答信号のパワーを測定・記憶し、
接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、
前記記憶した接続要求応答信号パワーに基づき、最も受信パワーの大きい接続要求応答信号を送出した親機と接続を開始することを特徴とする請求項１乃至３のいずれかに記載の無線ネットワーク接続方法。The slave is
Measure and store the power of each connection request response signal received from the master unit until a predetermined time has elapsed since the transition to the connection request state,
When a predetermined time has elapsed since the transition to the connection request state, the connection request state is terminated,
The wireless network connection method according to any one of claims 1 to 3, wherein a connection is started with a base unit that has transmitted a connection request response signal having the highest reception power based on the stored connection request response signal power. . 前記子機は、
接続する親機の優先順位データベースを有し、
接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、
優先順位データベースに基づき、前記接続要求状態に遷移した時点から所定時間が経過するまでに接続要求応答信号を受信した親機の中で、優先順位の高い親機と接続を開始することを特徴とする請求項１乃至３のいずれかに記載の無線ネットワーク接続方法。The slave is
It has a priority database of the base unit to be connected,
When a predetermined time has elapsed since the transition to the connection request state, the connection request state is terminated,
Based on a priority database, a connection is started with a parent device having a higher priority among the parent devices that have received a connection request response signal until a predetermined time has elapsed since the transition to the connection request state. The wireless network connection method according to any one of claims 1 to 3. 前記子機は、
前記接続要求状態に遷移した時点から所定時間が経過するまでに親機から受信した各接続要求応答信号のエラーレートを測定・記憶し、
接続要求状態に遷移してから所定時間が経過した時点で、接続要求状態を終了し、
前記記憶したエラーレートに基づき、最もエラーレートの小さい接続要求応答信号を送出した親機と接続を開始することを特徴とする請求項１乃至３のいずれかに記載の無線ネットワーク接続方法。The slave is
Measure and store the error rate of each connection request response signal received from the master unit until a predetermined time has elapsed since the transition to the connection request state,
When a predetermined time has elapsed since the transition to the connection request state, the connection request state is terminated,
The wireless network connection method according to any one of claims 1 to 3, wherein a connection is started with a base unit that has transmitted a connection request response signal with the lowest error rate based on the stored error rate. 複数の親機がネットワークに接続され、子機と前記複数の親機のうちの１つの親機との間で無線によるデータ伝送を行うとともに、子機が親機を介してネットワークにアクセス可能に構成された無線ネットワーク接続システムの親機において、
無線信号の送受信を行う無線部と、
親機のリンク動作を制御するリンク動作制御部と、
前記無線部から入力された受信無線信号のうち、接続中の子機からの受信無線データ信号に対して、無線データ信号処理を施し、受信データ信号としてネットワークインタフェース部に出力し、ネットワークインタフェース部から入力された接続中の子機への送信データ信号に対して、無線データ信号処理を施し、送信無線信号として無線部に出力する無線処理部と、
ネットワークから入力された、接続中の子機への送信データ信号を無線信号処理部に出力し、無線信号処理部から受信データ信号を入力し、ネットワークに送信するネットワークインタフェース部と、
を有することを特徴とする無線ネットワーク接続システムの親機。Multiple master units are connected to the network, wireless data transmission is performed between the slave unit and one of the master units, and the slave unit can access the network via the master unit In the base unit of the configured wireless network connection system,
A radio unit for transmitting and receiving radio signals;
A link operation control unit for controlling the link operation of the master unit;
Of the received radio signals input from the radio unit, the radio data signal processing is performed on the received radio data signal from the connected slave unit, and is output to the network interface unit as a received data signal. A radio processing unit that performs radio data signal processing on the input transmission data signal to the connected slave unit, and outputs the transmission data signal to the radio unit as a transmission radio signal;
A network interface unit that is input from the network, outputs a transmission data signal to the connected slave unit to the wireless signal processing unit, inputs a reception data signal from the wireless signal processing unit, and transmits to the network;
A base unit of a wireless network connection system, comprising:
JP2003169863A 2003-06-13 2003-06-13 Radio network connecting method and master unit of radio network connection system Pending JP2005006207A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008072418A (en) * 2006-09-14 2008-03-27 Shimadzu Corp Network connection type analyzer control system
JP2009296184A (en) * 2008-06-04 2009-12-17 Ricoh Co Ltd Radio communication network system, access point selection program, and storage medium having access point selection program stored therein
CN103747135A (en) * 2013-12-23 2014-04-23 宇龙计算机通信科技(深圳)有限公司 Non-signal state-based contact method and system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008072418A (en) * 2006-09-14 2008-03-27 Shimadzu Corp Network connection type analyzer control system
JP2009296184A (en) * 2008-06-04 2009-12-17 Ricoh Co Ltd Radio communication network system, access point selection program, and storage medium having access point selection program stored therein
CN103747135A (en) * 2013-12-23 2014-04-23 宇龙计算机通信科技(深圳)有限公司 Non-signal state-based contact method and system
CN103747135B (en) * 2013-12-23 2016-06-08 宇龙计算机通信科技(深圳)有限公司 Contact method and system based on no signal condition

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