JP2015142241A - Wireless communication system, wireless terminal, and wireless communication method - Google Patents

Wireless communication system, wireless terminal, and wireless communication method Download PDF

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JP2015142241A
JP2015142241A JP2014013923A JP2014013923A JP2015142241A JP 2015142241 A JP2015142241 A JP 2015142241A JP 2014013923 A JP2014013923 A JP 2014013923A JP 2014013923 A JP2014013923 A JP 2014013923A JP 2015142241 A JP2015142241 A JP 2015142241A
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義行 谷川
Yoshiyuki Tanigawa
義行 谷川
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Kyocera Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a wireless communication system, wireless terminal, and wireless communication method for making it possible to recognize when and where another wireless terminal (or, another user) has been located, without accessing a wide area communication network.SOLUTION: A representative configuration of a wireless communication system according to this invention is a wireless communication system 100 which includes a plurality of wireless terminals 102a, 102b, 102c which acquire their own position information from a GPS satellite 104. The wireless terminals 102a, 102b, 102c comprise a short range communication function for performing direct wireless communication with another wireless terminal; acquire ID information on the other wireless terminal by using short range communication, when passing by the other wireless terminal; and store passing-by information including position information, time information, and ID information at the time of passing by the other wireless terminal, as history data 130, in their storage unit 124.

Description

本発明は、ＧＰＳ衛星から自身の位置情報を取得する複数の無線端末を有する無線通信システムと、それに用いられる無線端末および無線通信方法に関する。   The present invention relates to a wireless communication system having a plurality of wireless terminals that acquire position information from a GPS satellite, and a wireless terminal and a wireless communication method used therefor.

従来、無線端末のユーザ（検索者）が、他のユーザ（検索対象者）の位置情報を取得する方法として、検索対象者の無線端末のＧＰＳ情報を利用することが知られている。この場合、検索者がサーバを介して検索対象者の無線端末に指示を送信し、検索対象者の無線端末は自身の位置を緯度、経度、高度で表すＧＰＳ情報をサーバに送信し、サーバは受信したＧＰＳ情報を住所表記の位置情報に変換して検索者の端末に送信する。なおＧＰＳ情報に代えて、検索対象者の無線端末が位置登録した基地局の位置情報が用いられる場合もある。   Conventionally, it is known that a user (searcher) of a wireless terminal uses GPS information of a wireless terminal of a search target person as a method of acquiring position information of another user (search target person). In this case, the searcher sends an instruction to the search target person's wireless terminal via the server, and the search target person's wireless terminal sends GPS information representing the position of the user in terms of latitude, longitude, and altitude to the server. The received GPS information is converted into address information and transmitted to the searcher's terminal. Note that the location information of the base station registered by the wireless terminal of the search target person may be used instead of the GPS information.

特許文献１には、ＧＰＳ情報を用いることなく移動無線機の位置推定を行う位置推定システムが開示されている。この位置推定システムでは、移動無線機が移動先ですれちがった他の移動無線機との間で近距離無線通信を行って互いの機器ＩＤを交換する機能を有しているとしている。また、移動無線機は、近くの接続局を介して位置推定装置に交差履歴データをアップロードし、位置推定装置の交差履歴データベースには、所定のエリア内を移動している複数の移動無線機の交差履歴データが蓄積されるとしている。特許文献１によれば、この交差履歴データを利用して、所定のエリア内を移動している移動無線機の位置の推定が行うことができるとしている。   Patent Document 1 discloses a position estimation system that estimates the position of a mobile wireless device without using GPS information. In this position estimation system, it is assumed that the mobile radio has a function of exchanging each other's device ID by performing short-range radio communication with another mobile radio that has passed at the destination. In addition, the mobile radio uploads the intersection history data to the position estimation device via a nearby connection station, and the intersection history database of the position estimation device has a plurality of mobile radio devices moving within a predetermined area. Crossing history data is accumulated. According to Patent Document 1, it is assumed that the position of a mobile wireless device moving within a predetermined area can be estimated using the intersection history data.

ところで近年、携帯型ゲーム機において、他のユーザのゲーム機との間で情報を交換したり、他のユーザのゲーム機のキャラクタと対戦したりできるようにしたものがある。その通信方法として、アドホックモードによって直接無線通信を行う、いわゆる「すれちがい通信」が知られている。   By the way, in recent years, some portable game machines can exchange information with game machines of other users or play against characters of game machines of other users. As such a communication method, so-called “passing communication” in which direct wireless communication is performed in an ad hoc mode is known.

例えば、特許文献２には、複数の情報処理装置が接近した場合、これまでに情報交換をしたことのない情報処理装置を優先して情報交換をすることができる情報処理装置および情報処理方法が開示されている。   For example, Patent Document 2 discloses an information processing apparatus and an information processing method capable of exchanging information with priority given to an information processing apparatus that has not exchanged information so far when a plurality of information processing apparatuses approach. It is disclosed.

特開２００８−２９８６８９号公報JP 2008-298689 A 特開２００７−１４２６１３号公報JP 2007-142613 A

しかしながら、上記のようにＧＰＳ情報を広域の通信網を介して位置情報として取得する場合、災害発生などで輻輳や中間ノードに障害が発生した場合、アクセスが急増して、所望の相手方の現在位置を取得することが困難であった。また、悪化している通信状態をさらに悪化させる原因にもつながってしまう。   However, when GPS information is acquired as location information via a wide-area communication network as described above, if congestion or a failure occurs in an intermediate node due to a disaster or the like, access increases rapidly, and the current location of the desired opponent It was difficult to get. Moreover, it will also lead to the cause of further worsening the deteriorated communication state.

この点は、特許文献１のように接続局を介して交差履歴データを取得して移動無線機の位置の推定を行う場合であっても同様である。   This is the same even when the position of the mobile radio is estimated by acquiring the intersection history data via the connecting station as in Patent Document 1.

一方、特許文献２の情報交換装置は、同じ相手とばかり情報交換してしまうことを避けるため、情報交換履歴リストに過去に情報交換したことのある端末機の識別コードと情報交換日時を記録するだけであり、すれちがい時の位置情報を記録するものではなかった。   On the other hand, in order to avoid exchanging information only with the same partner, the information exchanging apparatus of Patent Document 2 records the identification code and information exchanging date and time of the terminal that has exchanged information in the past in the information exchanging history list. However, the position information at the time of passing was not recorded.

本発明は、このような課題に鑑み、広域の通信網にアクセスすることなく、他の無線端末（すなわち他のユーザ）がいつどこにいたのかを知ることが可能な無線通信システム、無線端末および無線通信方法を提供することを目的とする。   In view of such problems, the present invention provides a wireless communication system, a wireless terminal, and a wireless terminal capable of knowing when and where other wireless terminals (that is, other users) are located without accessing a wide-area communication network. An object is to provide a communication method.

上記課題を解決するために、本発明にかかる無線通信システムの代表的な構成は、GPS衛星から自身の位置情報を取得する複数の無線端末を有する無線通信システムにおいて、無線端末は、他の無線端末と直接無線通信を行う近距離通信の機能を備え、他の無線端末とすれちがった時に、近距離通信によって他の無線端末のＩＤ情報を取得するとともに、すれちがった時の位置情報、時刻情報およびＩＤ情報を含むすれちがい情報を履歴データとして自端末の記憶部に記憶することを特徴とする。   In order to solve the above problems, a typical configuration of a wireless communication system according to the present invention is a wireless communication system having a plurality of wireless terminals that acquire position information of itself from GPS satellites. It has a short-range communication function for performing direct wireless communication with a terminal, and when passing by another wireless terminal, it acquires ID information of the other wireless terminal by short-range communication, and when passing, position information, time information and The passing information including the ID information is stored as history data in the storage unit of the terminal itself.

上記無線端末は、他の無線端末とすれちがった時に、近距離通信によって他の無線端末の記憶部が記憶している履歴データを取得するとよい。   The wireless terminal may acquire history data stored in a storage unit of another wireless terminal by short-range communication when passing by another wireless terminal.

上記無線通信システムが、さらにネットワークに接続されたサーバを有し、無線端末は、通信網のトラフィックが低い場合に、履歴データをネットワーク上のサーバに送信し、サーバはネットワークを介して他の無線端末が履歴データを参照可能とするとよい。   The wireless communication system further includes a server connected to the network, and the wireless terminal transmits history data to a server on the network when the traffic of the communication network is low, and the server transmits other wireless data via the network. It is preferable that the terminal can refer to the history data.

上記課題を解決するために、本発明にかかる無線端末の代表的な構成は、GPS衛星から自身の位置情報を取得する無線端末において、他の無線端末と直接無線通信を行う近距離通信の機能を備え、他の無線端末とすれちがった時に、近距離通信によって他の無線端末のＩＤ情報を取得するとともに、すれちがった時の位置情報、時刻情報およびＩＤ情報を含むすれちがい情報を履歴データとして自端末の記憶部に記憶することを特徴とする。   In order to solve the above problems, a typical configuration of a wireless terminal according to the present invention is a wireless terminal that acquires its own position information from a GPS satellite, and a short-range communication function that performs direct wireless communication with another wireless terminal. And when acquiring the ID information of the other wireless terminal by short-range communication when passing the other wireless terminal, the passing information including the position information, the time information and the ID information at the time of passing is used as history data. It memorize | stores in the memory | storage part.

上記課題を解決するために、本発明にかかる無線通信方法の代表的な構成は、GPS衛星から自身の位置情報を取得する無線端末同士の無線通信方法において、無線端末は、他の無線端末と直接無線通信を行う近距離通信の機能を備え、他の無線端末とすれちがった時に、近距離通信によって他の無線端末のＩＤ情報を取得するステップと、すれちがった時の位置情報、時刻情報およびＩＤ情報を含むすれちがい情報を履歴データとして記憶するステップとを含むことを特徴とする。   In order to solve the above-described problem, a representative configuration of a wireless communication method according to the present invention is a wireless communication method between wireless terminals that acquires its own position information from a GPS satellite. The wireless terminal is connected to another wireless terminal. A function of short-range communication that performs direct wireless communication, and when passing with another wireless terminal, acquiring ID information of the other wireless terminal by short-range communication, and position information, time information and ID when passing Storing passing information including information as history data.

本発明によれば、広域の通信網にアクセスすることなく、他の無線端末（すなわち他のユーザ）がいつどこにいたのかを知ることが可能な無線通信システム、無線端末および無線通信方法を提供することができる。   According to the present invention, it is possible to provide a wireless communication system, a wireless terminal, and a wireless communication method capable of knowing when and where other wireless terminals (that is, other users) are located without accessing a wide area communication network. be able to.

無線通信システムの構成を示す機能ブロック図である。It is a functional block diagram which shows the structure of a radio | wireless communications system. 無線通信システムの動作を例示する概念図である。It is a conceptual diagram which illustrates operation | movement of a radio | wireless communications system. 無線通信システムの動作を例示するシーケンス図である。It is a sequence diagram which illustrates operation | movement of a radio | wireless communications system. 記憶部に保存されたすれちがい情報の履歴データを例示する図である。It is a figure which illustrates the historical data of the passing information preserve | saved at the memory | storage part.

以下に添付図面を参照しながら、本発明の好適な実施形態について詳細に説明する。かかる実施形態に示す寸法、材料、その他具体的な数値などは、発明の理解を容易とするための例示にすぎず、特に断る場合を除き、本発明を限定するものではない。なお、本明細書および図面において、実質的に同一の機能、構成を有する要素については、同一の符号を付することにより重複説明を省略し、また本発明に直接関係のない要素は図示を省略する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

図１は、無線通信システム１００の構成を例示する機能ブロック図である。無線通信システム１００は、ＧＰＳ衛星１０４から自身の位置情報を取得する複数の無線端末１０２ａ、１０２ｂ、１０２ｃを有している。図１では、無線通信システム１００が無線端末を３つだけ有する場合を例示しているが、実際にはさらに多数の無線端末を有している。   FIG. 1 is a functional block diagram illustrating the configuration of the wireless communication system 100. The wireless communication system 100 includes a plurality of wireless terminals 102 a, 102 b, 102 c that acquire their own position information from the GPS satellite 104. Although FIG. 1 illustrates the case where the wireless communication system 100 has only three wireless terminals, the wireless communication system 100 actually has a larger number of wireless terminals.

無線端末１０２ｂおよび無線端末１０２ｃは、それぞれ無線端末１０２ａと同一の構成を有している。そのため、以下、代表例として無線端末１０２ａの構成についてのみ説明し、他の無線端末１０２ｂ,１０２ｃについても同一の符号を用いて説明する。   Each of the wireless terminal 102b and the wireless terminal 102c has the same configuration as that of the wireless terminal 102a. Therefore, hereinafter, only the configuration of the wireless terminal 102a will be described as a representative example, and the other wireless terminals 102b and 102c will be described using the same reference numerals.

無線端末１０２ａは、ＧＰＳ衛星１０４からＧＰＳ情報を受信するＧＰＳ受信部１１０と、通常の音声通信やデータ通信を行うための無線通信部１１２およびベースバンド部１１４と、近距離通信の機能を発揮する近距離通信部１１６および通信モード切替部１１８とを備えている。   The wireless terminal 102a exhibits a short-range communication function with a GPS receiving unit 110 that receives GPS information from a GPS satellite 104, a wireless communication unit 112 and a baseband unit 114 for performing normal voice communication and data communication. A short-range communication unit 116 and a communication mode switching unit 118 are provided.

ここで、ＧＰＳ情報とは、無線端末１０２ａ自身の位置を緯度、経度、高度で表す情報であり、近距離通信の機能とは、他の無線端末（本実施形態では無線端末１０２ｂ、１０２ｃ）と基地局を介さずに直接無線通信を行う機能である。なお近距離通信の機能の例としては、無線ＬＡＮ(IEEE802.11)やBlueTooth（登録商標）、ZigBee（登録商標）、RFID(Radio Frequency IDentification)などを利用することができる。   Here, the GPS information is information representing the position of the wireless terminal 102a itself by latitude, longitude, and altitude, and the short-range communication function is the other wireless terminals (wireless terminals 102b and 102c in the present embodiment). This function performs direct wireless communication without going through a base station. As examples of short-range communication functions, wireless LAN (IEEE802.11), BlueTooth (registered trademark), ZigBee (registered trademark), RFID (Radio Frequency IDentification), and the like can be used.

無線端末１０２ａは、さらに、他の無線端末のＩＤなどのユーザ情報を登録する端末情報登録部１２０と、ＧＰＳ情報を位置情報に変換する位置情報変換部１２２と、すれちがい情報などを履歴データ１３０として記憶する記憶部１２４と、ユーザが情報を入力するための入力部１２６と、無線端末１０２ａの動作を制御する制御部１２８と、自端末の周辺に他の無線端末が存在するかどうかを監視する周辺端末監視部１３２とを備えている。   The wireless terminal 102 a further includes, as history data 130, a terminal information registration unit 120 that registers user information such as IDs of other wireless terminals, a position information conversion unit 122 that converts GPS information into position information, and passing information. A storage unit 124 that stores information, an input unit 126 for a user to input information, a control unit 128 that controls the operation of the wireless terminal 102a, and monitors whether there are other wireless terminals around the terminal. And a peripheral terminal monitoring unit 132.

図２は、無線通信システム１００の動作を例示する概念図である。図３は、無線通信システム１００の動作を例示するシーケンス図である。以下、図１〜図３を参照しながら、無線通信システム１００の具体的な動作について説明する。   FIG. 2 is a conceptual diagram illustrating the operation of the wireless communication system 100. FIG. 3 is a sequence diagram illustrating the operation of the wireless communication system 100. Hereinafter, a specific operation of the wireless communication system 100 will be described with reference to FIGS.

無線端末１０２ａ,１０２ｂ,１０２ｃには、機器固有の端末ＩＤ（ＩＭＥＩなど）やユーザが予め入力部１２６によって入力しておいた氏名などを含むユーザ情報が端末情報登録部１２０に登録されている。そして、無線端末１０２ａ,１０２ｂ,１０２ｃのユーザが、それぞれ入力部１２６を操作して災害モードにすると、無線端末１０２ａ,１０２ｂ,１０２ｃの通信モード切替部１１８が近距離通信をオンにして、周辺端末監視部１３２が周辺端末監視を開始する（ステップＳ１００）。なお災害モードへの移行はユーザによる操作に限らず、基地局からの指示信号によって切り替えを行ってもよい。   In the wireless terminals 102a, 102b, and 102c, user information including a device-specific terminal ID (such as IMEI) and a name that the user has input in advance using the input unit 126 is registered in the terminal information registration unit 120. When the users of the wireless terminals 102a, 102b, and 102c operate the input unit 126 to enter the disaster mode, the communication mode switching unit 118 of the wireless terminals 102a, 102b, and 102c turns on the near field communication, and the peripheral terminal The monitoring unit 132 starts peripheral terminal monitoring (step S100). Note that the transition to the disaster mode is not limited to the operation by the user, but may be switched by an instruction signal from the base station.

この状態では、無線端末１０２ａ,１０２ｂ,１０２ｃは接続可能信号（相手を特定せずにブロードキャスト送信するビーコン信号）を出力しながら、同時に待ち受け状態となっている。   In this state, the wireless terminals 102a, 102b, and 102c are in a standby state at the same time while outputting a connectable signal (a beacon signal that is broadcast without specifying a partner).

例えば、図２において無線端末１０２ａが実線のように移動して他の無線端末１０２ｂとすれちがったとする。そして図３に示すように、無線端末１０２ｂが接続可能信号を送信し、これを無線端末１０２ａが受信したとする（ステップＳ１０２）。接続可能信号を受信した無線端末１０２ａは、制御部１２８において生成した認証要求通知を無線端末１０２ｂに送信する（ステップＳ１０４）。   For example, in FIG. 2, it is assumed that the wireless terminal 102a moves as shown by a solid line and passes the other wireless terminal 102b. Then, as shown in FIG. 3, it is assumed that the wireless terminal 102b transmits a connectable signal and the wireless terminal 102a receives it (step S102). The wireless terminal 102a that has received the connectable signal transmits an authentication request notification generated by the control unit 128 to the wireless terminal 102b (step S104).

一方、無線端末１０２ｂは、無線端末１０２ａの認証要求通知を受信し、制御部１２８が生成した認証成功応答を無線端末１０２ａに返信する（ステップＳ１０６）。これで無線端末１０２ａ、１０２ｂの接続が確立する。続いて、無線端末１０２ｂは、自身の端末ＩＤ情報を含むユーザ情報を、制御部１２８から無線端末１０２ａに送信する（ステップＳ１０８）。   On the other hand, the wireless terminal 102b receives the authentication request notification from the wireless terminal 102a, and returns an authentication success response generated by the control unit 128 to the wireless terminal 102a (step S106). This establishes a connection between the wireless terminals 102a and 102b. Subsequently, the wireless terminal 102b transmits user information including its own terminal ID information from the control unit 128 to the wireless terminal 102a (step S108).

一方、無線端末１０２ａは、無線端末１０２ｂのユーザ情報を受信し、このユーザ情報と、すれちがった時の位置情報、時刻情報とを含むすれちがい情報を履歴データ１３０として記憶部１２４に記憶する（ステップＳ１１０）。   On the other hand, the wireless terminal 102a receives the user information of the wireless terminal 102b, and stores the passing information including the user information, the position information at the time of passing, and the time information as the history data 130 in the storage unit 124 (step S110). ).

なお、「位置情報」とは、無線端末１０２ａがＧＰＳ情報（端末の位置を緯度、経度、高度で示した情報）をＧＰＳ受信部１１０によって受信し、位置情報変換部１２２によって位置情報（端末の位置を住所で示した情報）に変換したものである。   The “location information” means that the wireless terminal 102a receives GPS information (information indicating the location of the terminal in latitude, longitude, and altitude) by the GPS receiving unit 110, and the location information converting unit 122 receives the location information (terminal information). The information is converted into the information indicated by the address.

次に、図２において破線で示すように、無線端末１０２ａがさらに移動して他の無線端末１０２ｃとすれちがったとする。そして図３に示すように、無線端末１０２ａが送信した接続可能信号を、無線端末１０２ｃが受信したとする（ステップＳ１１２）。接続可能信号を受信した無線端末１０２ｃは、制御部１２８において生成した認証要求通知を無線端末１０２ａに送信する（ステップＳ１１４）。   Next, as shown by a broken line in FIG. 2, it is assumed that the wireless terminal 102a further moves and passes the other wireless terminal 102c. As shown in FIG. 3, it is assumed that the wireless terminal 102c receives the connectable signal transmitted by the wireless terminal 102a (step S112). The wireless terminal 102c that has received the connectable signal transmits the authentication request notification generated by the control unit 128 to the wireless terminal 102a (step S114).

一方、無線端末１０２ａは、無線端末１０２ｃの認証要求通知を受信し、制御部１２８が生成した認証成功応答を無線端末１０２ｃに返信する（ステップＳ１１６）。これで無線端末１０２ａ、１０２ｃの接続が確立する。続いて、無線端末１０２ａは、自身の端末ＩＤなどを含むユーザ情報を、制御部１２８によって無線端末１０２ｃに送信する（ステップＳ１１８）。また、無線端末１０２ａは、ステップＳ１１０の段階で自身の記憶部１２４に記憶しておいた他の無線端末１０２ｂとのすれちがい情報の履歴データ１３０も無線端末１０２ｃに送信する（ステップＳ１２０）。   On the other hand, the wireless terminal 102a receives the authentication request notification of the wireless terminal 102c, and returns the authentication success response generated by the control unit 128 to the wireless terminal 102c (step S116). This establishes the connection between the wireless terminals 102a and 102c. Subsequently, the wireless terminal 102a transmits user information including its own terminal ID and the like to the wireless terminal 102c by the control unit 128 (step S118). Further, the wireless terminal 102a also transmits to the wireless terminal 102c the history data 130 of the passing information with the other wireless terminal 102b stored in its storage unit 124 at the stage of step S110 (step S120).

一方、無線端末１０２ｃは、無線端末１０２ａのユーザ情報を受信し、このユーザ情報と、その時点での位置情報および時刻情報とを含むすれちがい情報を履歴データとして記憶部１２４に記憶する（ステップＳ１２２）。また、無線端末１０２ａから受信した無線端末１０２ａと無線端末１０２ｂのすれちがい情報の履歴データ１３０も記憶部１２４に記憶する（ステップＳ１２４）。   On the other hand, the wireless terminal 102c receives the user information of the wireless terminal 102a, and stores the passing information including the user information and the current position information and time information in the storage unit 124 as history data (step S122). . Further, the history data 130 of the passing information of the wireless terminal 102a and the wireless terminal 102b received from the wireless terminal 102a is also stored in the storage unit 124 (step S124).

このように、無線端末１０２ａ,１０２ｂ,１０２ｃは、互いにすれちがった時に近距離通信を行い、すれちがい情報を記憶する。そのため、無線端末１０２ａ,１０２ｂ,１０２ｃのユーザは、自身の保有する無線端末に記憶されたすれちがい情報を参照して、他の無線端末がいつどこにいたのかを知ることが可能である。   In this way, the wireless terminals 102a, 102b, and 102c perform near field communication when passing each other and store the passing information. Therefore, the users of the wireless terminals 102a, 102b, and 102c can know when and where the other wireless terminals were by referring to the passing information stored in the wireless terminals that they own.

さらに他の端末の履歴データも相互にやりとりすることによって、履歴データを累積的に共有することができる。記憶部１２４はデータベースのようになっている。図４は、記憶部１２４に保存されたすれちがい情報の履歴データを例示する図である。この例では、ユーザ情報の端末ＩＤに基づいてすれちがったユーザを識別し、「ユーザ１」および「ユーザ２」の欄に誰と誰がすれちがったかを時系列で記憶している。すれちがった位置情報は「場所」の欄に住所表示で記憶し、すれちがった時刻情報は「日時」の欄に記憶している。   Furthermore, the history data can be shared cumulatively by exchanging the history data of other terminals with each other. The storage unit 124 is like a database. FIG. 4 is a diagram illustrating history data of passing information stored in the storage unit 124. In this example, a user who has passed by is identified based on the terminal ID of the user information, and who and who passed by are stored in a time series in the “user 1” and “user 2” fields. The passing position information is stored in the “place” column as an address display, and the passing time information is stored in the “date and time” column.

ユーザは、無線端末にこのように記憶されたすれちがい情報またはその履歴データに対して、入力部１２６を操作してユーザＩＤや電話番号を入力して必要なデータを検索することも可能である。すなわち、複数の無線端末が履歴データを累積的に共有することにより、自身がすれ違っていない無線端末についても、いつどこにいたのかを知ることが可能になる。この累積的な履歴データを参照することにより、あるユーザの足跡を追跡することが可能となる。   The user can search for necessary data by operating the input unit 126 and inputting a user ID or a telephone number for the passing information or history data stored in the wireless terminal in this way. That is, when a plurality of wireless terminals cumulatively share history data, it is possible to know when and where a wireless terminal that has not passed by itself is also present. By referring to this cumulative history data, it becomes possible to track the footprint of a certain user.

以上のように、上記構成によれば、無線端末のユーザは、広域の通信網にアクセスすることなく、他の無線端末（すなわち他のユーザ）がいつどこにいたのかを知ることが可能となる。したがって災害発生などで通信状態が悪化している場合であっても、他のユーザの安否を確認することが可能で、悪化している通信状態をさらに悪化させることもない。   As described above, according to the above configuration, a user of a wireless terminal can know when and where another wireless terminal (that is, another user) was located without accessing a wide area communication network. Therefore, even if the communication state is deteriorated due to the occurrence of a disaster or the like, it is possible to confirm the safety of other users, and the deteriorated communication state is not further deteriorated.

なお、本実施形態において、無線通信システム１００がさらにネットワークに接続されたサーバを有し、無線端末１０２ａ,１０２ｂ,１０２ｃが、通信網のトラフィックが低い場合に、履歴データをネットワーク上のサーバに送信するように構成してもよい。例えば災害発生地において履歴データを蓄積し、災害発生地外に移動した無線端末があった場合に、その無線端末から携帯電話網などを通じてサーバに履歴データを送信する。サーバはネットワークを介して他の端末が履歴データを参照可能とする。   In this embodiment, the wireless communication system 100 further includes a server connected to the network, and the wireless terminals 102a, 102b, and 102c transmit history data to the server on the network when the communication network traffic is low. You may comprise. For example, history data is accumulated in a disaster occurrence area, and when there is a wireless terminal that has moved outside the disaster occurrence area, the history data is transmitted from the wireless terminal to a server through a mobile phone network or the like. The server allows other terminals to refer to the history data via the network.

この場合、インターネットなどのネットワーク（有線か無線かを問わない）を介して、パーソナルコンピュータやスマートフォンなどの他の様々な通信端末（無線端末を含む）から履歴データを参照することが可能となる。したがって近距離通信ができない遠隔地からも知人や家族の安否確認をすることが可能となる。   In this case, history data can be referred to from various other communication terminals (including wireless terminals) such as a personal computer and a smartphone via a network such as the Internet (whether wired or wireless). Therefore, it is possible to confirm the safety of acquaintances and family members from remote locations where short-range communication is not possible.

以上、添付図面を参照しながら本発明の好適な実施形態について説明したが、本発明はかかる例に限定されないことは言うまでもない。当業者であれば、特許請求の範囲に記載された範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

本発明は、ＧＰＳ衛星から自身の位置情報を取得する複数の無線端末を有する無線通信システムと、それに用いられる無線端末および無線通信方法として利用可能である。   INDUSTRIAL APPLICABILITY The present invention can be used as a wireless communication system having a plurality of wireless terminals that acquire its own position information from GPS satellites, and the wireless terminals and wireless communication methods used therefor.

１００…無線通信システム、１０４…ＧＰＳ衛星、１１０…ＧＰＳ受信部、１１６…近距離通信部、１１８…通信モード切替部、１２０…端末情報登録部、１２２…位置情報変換部、１２４…記憶部、１２６…入力部、１２８…制御部、１３０…履歴データ、１３２…周辺端末監視部、１０２ａ,１０２ｂ,１０２ｃ…無線端末 DESCRIPTION OF SYMBOLS 100 ... Wireless communication system, 104 ... GPS satellite, 110 ... GPS receiving part, 116 ... Short-range communication part, 118 ... Communication mode switching part, 120 ... Terminal information registration part, 122 ... Position information conversion part, 124 ... Memory | storage part, 126 ... Input unit, 128 ... Control unit, 130 ... History data, 132 ... Peripheral terminal monitoring unit, 102a, 102b, 102c ... Wireless terminal

Claims (5)

ＧＰＳ衛星から自身の位置情報を取得する複数の無線端末を有する無線通信システムにおいて、
前記無線端末は、他の無線端末と直接無線通信を行う近距離通信の機能を備え、前記他の無線端末とすれちがった時に、前記近距離通信によって前記他の無線端末のＩＤ情報を取得するとともに、前記すれちがった時の位置情報、時刻情報および前記ＩＤ情報を含むすれちがい情報を履歴データとして自端末の記憶部に記憶することを特徴とする無線通信システム。 In a wireless communication system having a plurality of wireless terminals that acquire position information from GPS satellites,
The wireless terminal has a short-range communication function for performing direct wireless communication with another wireless terminal, and acquires ID information of the other wireless terminal by the short-range communication when passing by the other wireless terminal. A wireless communication system characterized by storing passing information including position information, time information, and ID information when passing, as history data in a storage unit of the terminal itself. 前記無線端末は、前記他の無線端末とすれちがった時に、前記近距離通信によって前記他の無線端末の記憶部が記憶している前記履歴データを取得することを特徴とする請求項１に記載の無線通信システム。 The said radio | wireless terminal acquires the said log | history data which the memory | storage part of the said other radio | wireless terminal memorize | stores by the said short-range communication, when passing by the said other radio | wireless terminal. Wireless communication system. さらにネットワークに接続されたサーバを有し、
前記無線端末は、通信網のトラフィックが低い場合に、前記履歴データをネットワーク上の前記サーバに送信し、
前記サーバは前記ネットワークを介して前記他の無線端末が前記履歴データを参照可能とすることを特徴とする請求項１または請求項２に記載の無線通信システム。 In addition, it has a server connected to the network,
The wireless terminal transmits the history data to the server on the network when the traffic of the communication network is low,
The wireless communication system according to claim 1, wherein the server allows the other wireless terminal to refer to the history data via the network. ＧＰＳ衛星から自身の位置情報を取得する無線端末において、
他の無線端末と直接無線通信を行う近距離通信の機能を備え、前記他の無線端末とすれちがった時に、前記近距離通信によって前記他の無線端末のＩＤ情報を取得するとともに、前記すれちがった時の位置情報、時刻情報および前記ＩＤ情報を含むすれちがい情報を履歴データとして自端末の記憶部に記憶することを特徴とする無線端末。 In a wireless terminal that acquires its position information from a GPS satellite,
When a short-range communication function for performing direct wireless communication with another wireless terminal is obtained, and when passing with the other wireless terminal, the ID information of the other wireless terminal is acquired by the short-range communication, and when the passing A wireless terminal that stores passing information including position information, time information, and the ID information as history data in a storage unit of the terminal itself. ＧＰＳ衛星から自身の位置情報を取得する無線端末同士の無線通信方法において、
前記無線端末は、他の無線端末と直接無線通信を行う近距離通信の機能を備え、前記他の無線端末とすれちがった時に、前記近距離通信によって前記他の無線端末のＩＤ情報を取得するステップと、前記すれちがった時の位置情報、時刻情報および前記ＩＤ情報を含むすれちがい情報を履歴データとして記憶するステップとを含むことを特徴とする無線通信方法。 In a wireless communication method between wireless terminals that acquire own position information from GPS satellites,
The wireless terminal has a short-range communication function of directly performing wireless communication with another wireless terminal, and obtains ID information of the other wireless terminal by the short-range communication when passing by the other wireless terminal. And a step of storing the passing information including the positional information, the time information and the ID information at the time of passing as history data.
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