JP6095111B2

JP6095111B2 - Wireless communication system

Info

Publication number: JP6095111B2
Application number: JP2013051204A
Authority: JP
Inventors: 育実和田; 伊藤　哲也; 哲也伊藤; 幸宏原; 真則高岡; 優仁岩井; 貴宏長谷川
Original assignee: NEC Communication Systems Ltd
Current assignee: NEC Communication Systems Ltd
Priority date: 2013-03-14
Filing date: 2013-03-14
Publication date: 2017-03-15
Anticipated expiration: 2033-03-14
Also published as: JP2014179717A

Description

本発明は、無線通信システムにかかり、特に、無線端末の位置を推定することができる無線通信システムに関する。 The present invention relates to a wireless communication system, and more particularly to a wireless communication system capable of estimating the position of a wireless terminal.

スマートフォンやタブレット端末、ノートＰＣのような、携帯可能で無線ＬＡＮ通信機能を持つ装置について、セキュリティ管理や動態把握を目的として、その位置を推定したいという市場要求が存在する。屋外での測位については、ＧＰＳ（ＧｌｏｂａｌＰｏｓｉｔｉｏｎｉｎｇＳｙｓｔｅｍ）などの衛星測位技術により十分な精度で持って位置を推定することが可能である。しかし、屋内ではＧＰＳを利用できないため、無線通信信号を利用して装置の位置を指定する方式を用いることが考えられている。 There is a market demand for a portable device having a wireless LAN communication function, such as a smartphone, a tablet terminal, and a notebook PC, for the purpose of estimating the position for the purpose of security management and dynamic grasping. As for outdoor positioning, it is possible to estimate the position with sufficient accuracy by satellite positioning technology such as GPS (Global Positioning System). However, since GPS cannot be used indoors, it is considered to use a method of specifying the position of the apparatus using a wireless communication signal.

一般に無線信号を用いて位置推定を行う方式として、ＴＤＯＡ（ＴｉｍｅＤｉｆｆｅｒｅｎｃｅＯｆＡｒｒｉｖａｌ）方式、ＡＯＡ（ＡｎｇｌｅＯｆＡｒｒｉｖａｌ）方式、及びＲＳＳＩ（ＲｅｃｅｉｖｅＳｉｇｎａｌＳｔｒｅｎｇｔｈＩｎｄｉｃａｔｏｒ）方式を用いる方式がある。 In general, as a method of performing position estimation using a radio signal, there are a method using a TDOA (Time Difference Of Arrival) method, an AOA (Angle Of Arrival) method, and a RSSI (Receive Signal Strength Indicator) method.

ＴＤＯＡ方式は、無線信号の到達時間差から位置の推定を行う方式であり、比較的高精度に測位可能な方式である。しかし、推定精度は端末間の時刻同期精度に依存し、高精度な時刻同期は一般に高価な専用装置を用いなければ困難である。 The TDOA method is a method for estimating a position from the arrival time difference of radio signals, and is a method capable of positioning with relatively high accuracy. However, the estimation accuracy depends on the time synchronization accuracy between terminals, and high-accuracy time synchronization is generally difficult unless an expensive dedicated device is used.

ＡＯＡ方式は、無線信号の到来方向から位置の推定を行う方式であり、比較的高精度に測位可能な方式である。しかし推定精度は到来角の検出精度に依存し、高精度な到来角の検出には一般に高価で、かつ大型な専用装置を用いなければ困難である。 The AOA method is a method for estimating a position from the arrival direction of a radio signal, and is a method capable of positioning with relatively high accuracy. However, the estimation accuracy depends on the detection accuracy of the arrival angle, and it is generally difficult to detect the arrival angle with high accuracy unless an expensive and large dedicated device is used.

ＲＳＳＩ方式は、受信した信号の強さから位置を推定する方式である。ＲＳＳＩの測定は比較的容易であり、またその機能が既に通信機に含まれている場合が多く、既存の通信基盤を用いて位置推定システムを容易に構築することができる（例えば、特許文献１）。 The RSSI method is a method for estimating a position from the strength of a received signal. The measurement of RSSI is relatively easy, and the function is often already included in the communication device, and a position estimation system can be easily constructed using an existing communication infrastructure (for example, Patent Document 1). ).

特開２００８−０３９６０３号公報JP 2008-039603 A

しかしながら、無線端末の位置推定の際に、上述したＲＳＳＩ方式であっても、下記の問題が存在する。 However, when the position of the wireless terminal is estimated, the following problems exist even with the above-described RSSI method.

受信装置の設置密度：ＲＳＳＩは送信機と受信機間の距離の二乗に反比例する。そのため、ＲＳＳＩ方式による位置推定を行う場合、端末とＡＰ間の距離が遠くなると精度が悪化する。ところが、一般に無線ＬＡＮシステムは、サービスエリアが重複しないようにＡＰ（ＡｃｃｅｓｓＰｏｉｎｔ：基地局）を十分に離して設置するため、無線ＬＡＮ通信そのまま利用してＲＳＳＩ方式による位置推定を行うことは望ましくない。更に、ＡＰは接続する端末を管理し、通信するため比較的消費電力が高く、下げることも難しい。そのため、仮にＡＰを密に設置すると位置推定システム全体の消費電力が問題となる。また、価格についても同様である。 Installation density of receivers: RSSI is inversely proportional to the square of the distance between the transmitter and the receiver. Therefore, when performing position estimation by the RSSI method, the accuracy deteriorates as the distance between the terminal and the AP increases. However, in general, in a wireless LAN system, APs (Access Points: base stations) are installed sufficiently apart so that service areas do not overlap. Therefore, it is not desirable to perform position estimation by the RSSI method using wireless LAN communication as it is. . Furthermore, since the AP manages the terminal to be connected and communicates, the power consumption is relatively high and it is difficult to reduce it. Therefore, if APs are densely installed, the power consumption of the entire position estimation system becomes a problem. The same applies to the price.

発信源の識別：位置推定を行うためには、到来した信号がどの端末から発せられたものであるか識別する必要がる。しかし、発信元識別情報を無線ＬＡＮパケットへ通信データとして乗せると、観測装置において無線ＬＡＮ信号を復調及び復号する必要がある。無線ＬＡＮ信号の復調及び復号は複雑な信号処理を必要とするため、受信装置が複雑化する。一方で位置推定を行うための信号を、より復調及び復号が容易な無線方式で送信する場合、位置推定用信号を送信する専用の追加回路が必要となり、すでに市場に存在する無線ＬＡＮ機器による位置推定が困難となる。 Identification of transmission source: In order to perform position estimation, it is necessary to identify from which terminal an incoming signal originated. However, if the transmission source identification information is put on the wireless LAN packet as communication data, the observation device needs to demodulate and decode the wireless LAN signal. Since demodulation and decoding of a wireless LAN signal requires complicated signal processing, the receiving apparatus becomes complicated. On the other hand, when a signal for position estimation is transmitted by a wireless system that is easier to demodulate and decode, a dedicated additional circuit for transmitting the position estimation signal is required, and the position by a wireless LAN device that already exists in the market is required. Estimation becomes difficult.

複数チャネルの観測：一般に無線ＬＡＮシステムは、隣接するＡＰ間の干渉を回避するため、異なるチャネルを使用する。また、端末もＡＰに応じて異なるチャネルを使用する。よって、移動する端末の位置を連続的に推定するような場合、複数チャネルを同時に観測できることが望まれる。しかし、既存システムでは観測しようとするチャネルと同数の観測装置が必要であり、システム全体のコストが増大する。 Multiple channel observation: Generally, wireless LAN systems use different channels to avoid interference between adjacent APs. Also, the terminal uses a different channel depending on the AP. Therefore, when continuously estimating the position of a moving terminal, it is desired that a plurality of channels can be observed simultaneously. However, the existing system requires the same number of observation devices as the number of channels to be observed, increasing the cost of the entire system.

以上のように、ＲＳＳＩ方式によって無線端末の位置推定を行う場合には、位置推定の精度の低下、消費電力の増加、コストの増大という問題が生じる。 As described above, when the position of a wireless terminal is estimated by the RSSI method, there are problems such as a decrease in position estimation accuracy, an increase in power consumption, and an increase in cost.

このため、本発明の目的は、上述した課題である、無線端末の位置推定を行う場合における位置推定の精度の低下、消費電力の増加、コストの増大という問題を解決することにある。 For this reason, an object of the present invention is to solve the problems described above, such as a decrease in position estimation accuracy, an increase in power consumption, and an increase in cost when performing position estimation of a wireless terminal.

本発明の一形態である無線通信システムは、
移動体である無線通信端末と、所定範囲に設置され前記無線通信端末から送信された無線信号を受信する複数の受信装置と、前記複数の受信装置と接続され前記無線通信端末の位置推定を行う位置推定装置と、を備え、
前記無線通信端末は、当該無線通信端末を識別する識別情報に対応する信号特性を有する無線信号を送信する無線信号送信部を備え、
前記受信装置は、前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出する端末情報受信部と、前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて前記位置推定装置に送信する端末情報送信部と、を備え、
前記位置推定装置は、前記受信装置から受信した前記無線通信端末の識別情報及び前記受信情報の識別情報に基づいて、前記無線通信端末の位置を推定する端末位置推定部を備えた、
という構成をとる。 A wireless communication system according to an aspect of the present invention includes:
A wireless communication terminal that is a mobile body, a plurality of reception devices that are installed in a predetermined range and receive wireless signals transmitted from the wireless communication terminal, and are connected to the plurality of reception devices to estimate the position of the wireless communication terminal A position estimation device,
The wireless communication terminal includes a wireless signal transmission unit that transmits a wireless signal having signal characteristics corresponding to identification information for identifying the wireless communication terminal,
The reception device receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, and detects terminal information reception that detects identification information of the radio communication terminal based on the detected signal characteristic A terminal information transmission unit that associates the identification information of the wireless communication terminal with the identification information that identifies the reception device that is the device, and transmits the identification information to the position estimation device.
The position estimation device includes a terminal position estimation unit that estimates the position of the wireless communication terminal based on the identification information of the wireless communication terminal received from the reception device and the identification information of the reception information.
The configuration is as follows.

また、本発明の他の形態である位置推定方法は、
移動体である無線通信端末と、所定範囲に設置され前記無線通信端末から送信された無線信号を受信する複数の受信装置と、前記複数の受信装置と接続され前記無線通信端末の位置推定を行う位置推定装置と、を備えた無線通信システムにより、前記無線通信端末の位置を推定する位置推定方法であって、
前記無線通信端末が、当該無線通信端末を識別する識別情報に対応する信号特性を有する無線信号を送信し、
前記受信装置が、前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出し、前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて前記位置推定装置に送信し、
前記位置推定装置が、前記受信装置から受信した前記無線通信端末の識別情報及び前記受信情報の識別情報に基づいて、前記無線通信端末の位置を推定する、
という構成をとる。 In addition, the position estimation method according to another aspect of the present invention includes:
A wireless communication terminal that is a mobile body, a plurality of reception devices that are installed in a predetermined range and receive wireless signals transmitted from the wireless communication terminal, and are connected to the plurality of reception devices to estimate the position of the wireless communication terminal A position estimation method for estimating a position of the wireless communication terminal by a wireless communication system comprising a position estimation device,
The wireless communication terminal transmits a wireless signal having signal characteristics corresponding to identification information for identifying the wireless communication terminal;
The receiving device receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, detects identification information of the radio communication terminal based on the detected signal characteristic, and In association with the identification information of the communication terminal and the identification information for identifying the receiving device that is itself is transmitted to the position estimation device,
The position estimation device estimates the position of the wireless communication terminal based on the identification information of the wireless communication terminal and the identification information of the reception information received from the reception device;
The configuration is as follows.

また、本発明の他の形態である受信装置は、
所定範囲に複数設置され、移動体である無線通信端末から送信された無線信号を受信する受信装置であって、
前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出する端末情報受信部と、
前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて、前記無線通信端末の位置推定を行う位置推定装置に送信する端末情報送信部と、
を備えた、
という構成をとる。 In addition, a receiving apparatus according to another aspect of the present invention is
A receiving device that is installed in a predetermined range and receives a radio signal transmitted from a radio communication terminal that is a mobile body,
A terminal information receiving unit that receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, and detects identification information of the radio communication terminal based on the detected signal characteristic;
A terminal information transmission unit for associating identification information of the wireless communication terminal with identification information for identifying the receiving device that is itself, and transmitting the information to a position estimation device that performs position estimation of the wireless communication terminal;
With
The configuration is as follows.

また、本発明の他の形態であるプログラムは、
所定範囲に複数設置され、移動体である無線通信端末から送信された無線信号を受信する受信装置に、
前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出する端末情報受信部と、
前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて、前記無線通信端末の位置推定を行う位置推定装置に送信する端末情報送信部と、
を実現させるためのプログラムである。 Moreover, the program which is the other form of this invention is:
In a receiving device that is installed in a predetermined range and receives a radio signal transmitted from a radio communication terminal that is a mobile body,
A terminal information receiving unit that receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, and detects identification information of the radio communication terminal based on the detected signal characteristic;
A terminal information transmission unit for associating identification information of the wireless communication terminal with identification information for identifying the receiving device that is itself, and transmitting the information to a position estimation device that performs position estimation of the wireless communication terminal;
It is a program for realizing.

本発明は、以上のように構成されることにより、無線通信システムにおいて無線端末の位置推定を行う場合における、位置推定の精度の向上、消費電力の低下、コストの低下、を図ることができる。 By configuring as described above, the present invention can improve the accuracy of position estimation, reduce power consumption, and reduce costs when performing position estimation of a wireless terminal in a wireless communication system.

本発明の実施形態１における無線通信システムの全体構成を示す図である。It is a figure which shows the whole structure of the radio | wireless communications system in Embodiment 1 of this invention. 本発明の実施形態１における無線通信システムの構成の概略をブロック図である。1 is a block diagram illustrating an outline of a configuration of a wireless communication system according to Embodiment 1 of the present invention. 図２に開示した無線通信システムの動作を示すシーケンス図である。FIG. 3 is a sequence diagram illustrating an operation of the wireless communication system disclosed in FIG. 2. 本発明の実施形態２における無線通信システムの構成の概略をブロック図である。It is a block diagram for the outline of a structure of the radio | wireless communications system in Embodiment 2 of this invention. 図４に開示した無線通信システムの動作を示すシーケンス図である。FIG. 5 is a sequence diagram illustrating an operation of the wireless communication system disclosed in FIG. 4.

＜実施形態１＞
本発明の第１の実施形態を、図１乃至図３を参照して説明する。図１乃至図２は、無線通信システムの構成を示す図であり、図３は、無線通信システムの動作を示す図である。 <Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. 1 and 2 are diagrams illustrating a configuration of a wireless communication system, and FIG. 3 is a diagram illustrating an operation of the wireless communication system.

図１に示すように、無線通信システムは、ユーザが所持する移動体である無線端末１と、当該無線端末１と無線通信を行う無線ＬＡＮ基地局２と、無線端末１から送信された無線ＬＡＮ信号を受信する複数の受信機３と、を備えている。また、無線通信システムは、図示しない有線又は無線のネットワークを介して複数の受信機３及び無線ＬＡＮ基地局２に接続され、無線端末１の位置推定を行う位置推定装置４を備えている。以下、各構成について詳述する。 As shown in FIG. 1, a wireless communication system includes a wireless terminal 1 that is a mobile body possessed by a user, a wireless LAN base station 2 that performs wireless communication with the wireless terminal 1, and a wireless LAN transmitted from the wireless terminal 1. And a plurality of receivers 3 for receiving signals. The wireless communication system includes a position estimation device 4 that is connected to a plurality of receivers 3 and the wireless LAN base station 2 via a wired or wireless network (not shown) and estimates the position of the wireless terminal 1. Hereinafter, each configuration will be described in detail.

上記無線端末１（無線通信端末）は、例えば、ＩＥＥＥ８０２．１１規格に準拠した無線ＬＡＮ通信機能を具備した情報処理端末である。具体例としては、スマートフォン、タブレット、ノートＰＣ、携帯ゲーム機などである。そして、無線端末１は、無線ＬＡＮ基地局２による無線ＬＡＮ通信に帰属しており、当該無線ＬＡＮ基地局２が定める通信チャネルにて無線ＬＡＮ通信可能なよう設定されている。 The wireless terminal 1 (wireless communication terminal) is, for example, an information processing terminal having a wireless LAN communication function compliant with the IEEE 802.11 standard. Specific examples include smartphones, tablets, notebook PCs, and portable game machines. The wireless terminal 1 belongs to wireless LAN communication by the wireless LAN base station 2 and is set to be able to perform wireless LAN communication on a communication channel defined by the wireless LAN base station 2.

また、無線端末１は、図２に示すように、装備された演算装置にプログラムが組み込まれることで構築された無線信号送信部１１を備えている。無線信号送信部１１は、上述した無線ＬＡＮ基地局２に対する予め定められた通信チャネルの無線ＬＡＮ信号を生成して送信する。このとき、無線信号送信部１１は、自端末である無線端末１に割り当てられた識別情報である無線端末ＩＤに応じた信号特性を有する無線ＬＡＮ信号を生成する。具体的に、無線信号送信部１１は、無線端末ＩＤに応じた長さのフレームを有する無線ＬＡＮ信号の組である測位信号セットを生成し、当該測位信号セットを無線ＬＡＮ基地局２に送信する。上記無線端末ＩＤに応じたフレーム長の無線信号を生成して送信する技術については、特開２０１２−１７５５４４に記載されている。 Further, as shown in FIG. 2, the wireless terminal 1 includes a wireless signal transmission unit 11 that is constructed by incorporating a program into an equipped arithmetic device. The wireless signal transmission unit 11 generates and transmits a wireless LAN signal of a predetermined communication channel for the wireless LAN base station 2 described above. At this time, the wireless signal transmission unit 11 generates a wireless LAN signal having signal characteristics corresponding to the wireless terminal ID that is identification information assigned to the wireless terminal 1 that is the terminal itself. Specifically, the wireless signal transmission unit 11 generates a positioning signal set that is a set of wireless LAN signals having a frame having a length corresponding to the wireless terminal ID, and transmits the positioning signal set to the wireless LAN base station 2. . A technique for generating and transmitting a wireless signal having a frame length corresponding to the wireless terminal ID is described in JP 2012-175544 A.

なお、無線信号送信部１１は、上述した無線ＬＡＮ信号の組である測位信号セットを無線ＬＡＮ信号に対して送信しているが、後述するように、当該無線ＬＡＮ信号の到達範囲１０内に存在する受信機３にも送信されることとなる。但し、無線信号送信部１１は、上記無線ＬＡＮ信号とは異なる無線信号として、自端末の無線端末ＩＤに応じた信号特性を有する受信機用無線信号を生成して送信してもよい。 The wireless signal transmission unit 11 transmits a positioning signal set, which is a set of the above-described wireless LAN signals, to the wireless LAN signal. However, as will be described later, the wireless signal transmission unit 11 exists within the wireless LAN signal reachable range 10. It is also transmitted to the receiver 3. However, the wireless signal transmission unit 11 may generate and transmit a receiver wireless signal having signal characteristics corresponding to the wireless terminal ID of the terminal as a wireless signal different from the wireless LAN signal.

また、無線端末１は、自端末の移動を検出する移動検出センサ（移動検出部）（図示せず）を備えており、移動を検出すると、その旨を無線信号送信部１１に通知する。無線信号送信部１１は、移動検出センサから移動検出の通知を受けると、上述した無線ＬＡＮ信号を送信する。 In addition, the wireless terminal 1 includes a movement detection sensor (movement detection unit) (not shown) that detects the movement of the terminal itself. When the movement is detected, the wireless terminal 1 notifies the wireless signal transmission unit 11 to that effect. When receiving a movement detection notification from the movement detection sensor, the wireless signal transmission unit 11 transmits the wireless LAN signal described above.

ここで、移動検出センサは、例えば、加速度センサやＧＰＳなどであり、これらからの検出値に基づいて、無線信号送信部１１が、無線端末１が移動したか否かを判断し、移動したと判断すると無線ＬＡＮ信号を送信する。なお、上記移動検出センサは、上述したものに限定されず、無線端末１が移動したか否かを判断できるデータを取得できる装置であれば、いかなる装置であってもよい。また、上記では、無線信号送信部１１は、移動検出を契機に無線ＬＡＮ信号を送信することを説明したが、一定の時間間隔で送信したり、外部から所定の入力があった場合に送信するなど、いかなるタイミングで無線ＬＡＮ信号を送信してもよい。 Here, the movement detection sensor is, for example, an acceleration sensor, a GPS, or the like. Based on the detection values from these, the wireless signal transmission unit 11 determines whether the wireless terminal 1 has moved, and has moved. If determined, a wireless LAN signal is transmitted. The movement detection sensor is not limited to the above-described sensor, and may be any apparatus as long as it can acquire data that can determine whether the wireless terminal 1 has moved. In the above description, it has been described that the wireless signal transmission unit 11 transmits the wireless LAN signal in response to the movement detection. However, the wireless signal transmission unit 11 transmits the signal at a constant time interval or when there is a predetermined input from the outside. The wireless LAN signal may be transmitted at any timing.

次に、受信機３（受信装置）について説明する。受信機３は、図１に示すように所定範囲に複数設置されており、特に、無線ＬＡＮ基地局２の設置密度よりも高い密度で設置されている。そして、受信機３は、装備された演算装置にプログラムが組み込まれることで構築された、端末情報受信部３１と、端末情報送信部３２と、を備えている。 Next, the receiver 3 (receiving device) will be described. As shown in FIG. 1, a plurality of receivers 3 are installed in a predetermined range, and in particular, are installed at a density higher than the installation density of the wireless LAN base stations 2. And the receiver 3 is provided with the terminal information receiving part 31 and the terminal information transmission part 32 which were constructed | assembled by incorporating a program in the equipped arithmetic unit.

上記端末情報受信部３１は、複数の通信チャネルの無線ＬＡＮ信号を受信可能であり、無線端末１から送信された無線ＬＡＮ信号を受信する。そして、端末情報受信部３１は、受信した無線ＬＡＮ信号の信号特性を検出し、検出した信号特性に対応する無線端末ＩＤを検出する。具体的に、端末情報受信部３１は、受信した無線ＬＡＮ信号を包絡線検波することで当該無線ＬＡＮ信号のフレーム長を検出し、この検出したフレーム長に対応する無線端末ＩＤを検出する。なお、包絡線検波を用いて無線ＬＡＮ信号のフレーム長から無線端末ＩＤを検出する技術については、特開２０１２−１７５５４４に記載されている。但し、端末情報受信部３１は、受信した無線ＬＡＮ信号の信号特性として、フレーム長とは異なる他の信号特性を検出し、かかる信号特性から無線端末ＩＤを検出してもよい。 The terminal information receiving unit 31 can receive wireless LAN signals of a plurality of communication channels, and receives wireless LAN signals transmitted from the wireless terminal 1. Then, the terminal information receiving unit 31 detects the signal characteristic of the received wireless LAN signal, and detects the wireless terminal ID corresponding to the detected signal characteristic. Specifically, the terminal information receiving unit 31 detects the frame length of the wireless LAN signal by performing envelope detection on the received wireless LAN signal, and detects the wireless terminal ID corresponding to the detected frame length. A technique for detecting the wireless terminal ID from the frame length of the wireless LAN signal using envelope detection is described in JP 2012-175544 A. However, the terminal information receiving unit 31 may detect another signal characteristic different from the frame length as the signal characteristic of the received wireless LAN signal, and detect the wireless terminal ID from the signal characteristic.

以上のように、端末情報受信部３１は、無線ＬＡＮ信号を復調及び復号することなく、当該無線ＬＡＮ信号の信号特性から無線端末ＩＤを検出可能である。このため、端末情報受信部３１は、無線ＬＡＮ基地局２が備える無線信号の受信機能、つまり、無線ＬＡＮ信号を復調及び復号して当該信号の内容を認識する機能を備える必要はない。これに伴い、受信機３は、上述したように複数の通信チャネルの無線ＬＡＮ信号を受信可能となり、特定の通信チャネルの信号のみを取り出すＢＰＦ（ＢａｎｄＰａｓｓＦｉｌｔｅｒ）を備える必要が無い。従って、受信機３の構成が簡易となる。 As described above, the terminal information receiving unit 31 can detect the wireless terminal ID from the signal characteristics of the wireless LAN signal without demodulating and decoding the wireless LAN signal. For this reason, the terminal information receiving unit 31 does not need to have a function of receiving a wireless signal provided in the wireless LAN base station 2, that is, a function of demodulating and decoding the wireless LAN signal and recognizing the content of the signal. Accordingly, the receiver 3 can receive wireless LAN signals of a plurality of communication channels as described above, and does not need to have a BPF (Band Pass Filter) that extracts only signals of a specific communication channel. Therefore, the configuration of the receiver 3 is simplified.

また、端末情報受信部３１は、受信した無線ＬＡＮ信号の受信強度を表すＲＳＳＩ（ＲｅｃｅｉｖｅｄＳｉｇｎａｌＳｔｒｅｎｇｔｈＩｎｄｉｃａｔｉｏｎ）を検出する機能を有する。そして、端末情報受信部３１は、上述したように検出した無線端末ＩＤ及びＲＳＳＩを、端末情報送信部３２に渡す。 In addition, the terminal information receiving unit 31 has a function of detecting an RSSI (Received Signal Strength Indication) indicating the reception strength of the received wireless LAN signal. Then, the terminal information receiving unit 31 passes the wireless terminal ID and RSSI detected as described above to the terminal information transmitting unit 32.

受信機３が備える上記端末情報送信部３２は、端末情報受信部３１から渡された無線端末ＩＤ及びＲＳＳＩを、ネットワークを介して位置推定装置４に送信する。このとき、端末情報送信部３１は、自装置に予め割当てられた識別情報である受信機ＩＤに、上記無線端末ＩＤ及びＲＳＳＩを関連付けた端末関連情報として、位置推定装置４に送信する。なお、端末情報送信部３２は、必ずしもＲＳＳＩを送信しなくてもよく、受信機ＩＤに、端末情報受信部３１から渡された無線端末ＩＤのみを関連付けた端末関連情報を、位置推定装置４に送信してもよい。これに伴い、上記端末情報受信部３１は、ＲＳＳＩを検出する機能を備えていなくてもよい。 The terminal information transmission unit 32 included in the receiver 3 transmits the wireless terminal ID and RSSI passed from the terminal information reception unit 31 to the position estimation device 4 via the network. At this time, the terminal information transmission part 31 transmits to the position estimation apparatus 4 as terminal relevant information which linked | related the said radio | wireless terminal ID and RSSI to receiver ID which is the identification information previously allocated to the own apparatus. The terminal information transmission unit 32 does not necessarily need to transmit the RSSI, and terminal-related information in which only the wireless terminal ID passed from the terminal information reception unit 31 is associated with the receiver ID is transmitted to the position estimation device 4. You may send it. Accordingly, the terminal information receiving unit 31 may not have a function of detecting RSSI.

次に、位置推定装置４について説明する。位置推定装置４は、演算装置及び記憶装置を備えた情報処理装置であり、装備された演算装置にプログラムが組み込まれることで構築された端末位置推定部４１を備えている。端末位置推定部４１は、複数の受信機３からそれぞれ送信された端末関連情報、つまり、受信機３が受信した無線ＬＡＮ信号から検出した「無線端末ＩＤ」及び「ＲＳＳＩ」と、その受信機３の「受信機ＩＤ」と、が関連付けられた端末関連情報を取得する。そして、端末位置推定部４１は、取得した端末関連情報に基づいて、無線端末の位置を推定する計算処理を行う。 Next, the position estimation device 4 will be described. The position estimation device 4 is an information processing device including an arithmetic device and a storage device, and includes a terminal position estimation unit 41 constructed by incorporating a program into the arithmetic device equipped. The terminal position estimation unit 41 includes terminal-related information transmitted from each of the plurality of receivers 3, that is, “wireless terminal ID” and “RSSI” detected from the wireless LAN signal received by the receiver 3, and the receiver 3 Terminal-related information associated with the “receiver ID” is acquired. And the terminal position estimation part 41 performs the calculation process which estimates the position of a radio | wireless terminal based on the acquired terminal relevant information.

具体的に、端末位置推定部４１は、まず、受信した端末関連情報のうち、同じ「無線端末ＩＤ」を含む端末関連情報を抽出し、これら端末関連情報に含まれている「ＲＳＳＩ」の値を調べる。そして、「ＲＳＳＩ」の値が最も高い端末関連情報を特定し、当該端末関連情報に含まれる「受信機ＩＤ」を特定する。さらに、「受信機ＩＤ」に対応する受信機３を特定し、この受信機３の位置を無線端末１の位置として推定する。なお、これに伴い、位置推定装置４は、予め受信機ＩＤと受信機３の位置情報とを関連付けて記憶している。 Specifically, the terminal position estimation unit 41 first extracts terminal related information including the same “wireless terminal ID” from the received terminal related information, and the value of “RSSI” included in these terminal related information Check out. Then, the terminal-related information having the highest “RSSI” value is specified, and the “receiver ID” included in the terminal-related information is specified. Further, the receiver 3 corresponding to the “receiver ID” is specified, and the position of the receiver 3 is estimated as the position of the wireless terminal 1. Along with this, the position estimation device 4 stores the receiver ID and the position information of the receiver 3 in association with each other in advance.

ここで、上述した端末位置推定部４１による処理は一例であって、他の方法により無線端末１の位置を推定してもよい。例えば、上述したように特定した受信機３の位置を「ＲＳＳＩ」の値に基づいて補正したり、「ＲＳＳＩ」を距離に変換した後に最小二乗誤差法を用いて無線端末１の位置を推定してもよい。あるいは、端末位置推定部４１は、「ＲＳＳＩ」の値が高い順に複数の受信機３を特定し、これら複数の受信機３の位置から無線端末１の位置を推定してもよい。 Here, the processing by the terminal position estimation unit 41 described above is an example, and the position of the wireless terminal 1 may be estimated by another method. For example, the position of the wireless terminal 1 is estimated using the least square error method after correcting the position of the receiver 3 identified as described above based on the value of “RSSI” or converting “RSSI” into a distance. May be. Alternatively, the terminal position estimation unit 41 may specify a plurality of receivers 3 in descending order of the “RSSI” value, and estimate the position of the wireless terminal 1 from the positions of the plurality of receivers 3.

また、端末位置推定部４１は、受信機３から取得した端末関連情報に「ＲＳＳＩ」が含まれていない場合、つまり、受信機３が無線端末ＩＤと受信機ＩＤの情報しか送信してこなかった場合には、当該取得した情報に含まれる受信機ＩＤの位置情報に基づいて無線端末１の位置を推定してもよい。例えば、無線端末ＩＤと受信機ＩＤとの端末関連情報を送信してきた受信機３が１つのみの場合には、かかる受信機３の位置を無線端末１の位置として推定してもよく、受信機３が複数の場合には、これら複数の受信機３の位置から無線端末１の位置を推定してもよい。 In addition, the terminal position estimation unit 41, when “RSSI” is not included in the terminal related information acquired from the receiver 3, that is, the receiver 3 has transmitted only the information of the wireless terminal ID and the receiver ID. In the case, the position of the wireless terminal 1 may be estimated based on the position information of the receiver ID included in the acquired information. For example, when there is only one receiver 3 that has transmitted the terminal-related information between the wireless terminal ID and the receiver ID, the position of the receiver 3 may be estimated as the position of the wireless terminal 1 and received. When there are a plurality of devices 3, the position of the wireless terminal 1 may be estimated from the positions of the plurality of receivers 3.

次に、上述した無線通信システムの動作を、図３のシーケンスを参照して説明する。まず、無線端末１は、装備された移動検出センサで自端末が移動したか否かを検出する（ステップＳ１）。無線端末１は、移動を検出したことを契機に、自身に割り当てられている無線端末ＩＤに応じた特定の長さを持つ無線ＬＡＮ信号の組である測位信号セットを生成して送信する（ステップＳ２）。 Next, the operation of the above-described wireless communication system will be described with reference to the sequence of FIG. First, the wireless terminal 1 detects whether or not the own terminal has moved by the equipped movement detection sensor (step S1). The wireless terminal 1 generates and transmits a positioning signal set, which is a set of wireless LAN signals having a specific length corresponding to the wireless terminal ID assigned to the wireless terminal 1 when the movement is detected (step) S2).

すると、無線端末１が送信した上記測位信号セット（無線ＬＡＮ信号）の到達範囲内に位置する全ての受信機３が、当該無線端末１が送信した測位信号セットを受信する。そして、各受信機３は、それぞれ受信した無線ＬＡＮ信号の組である測位信号セットを包絡線検波し、その結果として得られた信号長の組から、無線端末ＩＤを得る（ステップＳ３）。また、受信機３は、無線ＬＡＮ信号を受信した際における受信強度であるＲＳＳＩを測定する（ステップＳ３）。そして、各受信機３は、検出した無線端末ＩＤ及びＲＳＳＩと、自身である受信機３の受信機ＩＤと、を組にして関連付けた端末関連情報を、位置推定装置４にそれぞれ送信する（ステップＳ４）。 Then, all the receivers 3 positioned within the reach of the positioning signal set (wireless LAN signal) transmitted by the wireless terminal 1 receive the positioning signal set transmitted by the wireless terminal 1. Each receiver 3 then envelope-detects a positioning signal set that is a set of received wireless LAN signals, and obtains a wireless terminal ID from the set of signal lengths obtained as a result (step S3). Further, the receiver 3 measures RSSI that is the reception intensity when the wireless LAN signal is received (step S3). Each receiver 3 transmits terminal-related information associated with the detected wireless terminal ID and RSSI and the receiver ID of the receiver 3 as a set to the position estimation device 4 (step). S4).

そして、位置推定装置４は、複数の受信機３からそれぞれ受信した上記端末関連情報から、まず、同一の無線端末ＩＤを含むものを抽出する。そして、抽出した端末関連情報に含まれる「ＲＳＳＩ」が最も強い端末関連情報を特定し、当該端末関連情報に含まれる受信機ＩＤの位置を読み出して、その受信機３の位置付近に無線端末１が存在すると推定する（ステップＳ５）。その後、位置推定装置４は、無線端末１の位置の推定結果を、無線ＬＡＮ基地局２及び当該無線ＬＡＮ基地局２を介して無線端末１に通知する（ステップＳ６，Ｓ７）。 Then, the position estimation device 4 first extracts information including the same wireless terminal ID from the terminal related information received from each of the plurality of receivers 3. Then, the terminal-related information having the strongest “RSSI” included in the extracted terminal-related information is identified, the position of the receiver ID included in the terminal-related information is read, and the wireless terminal 1 is located near the position of the receiver 3. (Step S5). Thereafter, the position estimation device 4 notifies the wireless terminal 1 of the position estimation result of the wireless terminal 1 via the wireless LAN base station 2 and the wireless LAN base station 2 (steps S6 and S7).

以上のように、本発明によると、まず、位置を推定する対象となる無線端末１に特別な装置や機能を追加することなく、ＩＥＥＥ８０２．１１規格に準拠した端末、及び、任意の長さの信号を連続して送信することが可能な無線通信規格に準拠する端末であれば、その位置を推定することができる。 As described above, according to the present invention, first, a terminal conforming to the IEEE 802.11 standard and an arbitrary length without adding a special device or function to the wireless terminal 1 whose position is to be estimated. If the terminal conforms to a wireless communication standard capable of continuously transmitting the above signal, the position can be estimated.

また、センサによる無線端末１の移動の検出等をトリガとして、無線信号を送信することで、不要な信号の送信を抑制できる。その結果、無線端末１の消費電力を削減できる。 Moreover, transmission of an unnecessary signal can be suppressed by transmitting a wireless signal triggered by detection of movement of the wireless terminal 1 by a sensor or the like. As a result, the power consumption of the wireless terminal 1 can be reduced.

また、受信機３は、無線信号の復調及び復号をすることなく、送信元である無線端末１を識別することができる。従って、簡易に受信機３を構成できる。また、無線信号自身に暗号化が行われていても、送信元の識別が可能である。これに伴い、低コストにて受信機３の設置密度の向上を図ることができ、無線端末１の測位精度の向上を図ることができる。 Further, the receiver 3 can identify the wireless terminal 1 that is the transmission source without demodulating and decoding the wireless signal. Therefore, the receiver 3 can be simply configured. Further, even if the wireless signal itself is encrypted, the transmission source can be identified. Accordingly, the installation density of the receivers 3 can be improved at low cost, and the positioning accuracy of the wireless terminal 1 can be improved.

また、単一の受信機３で全通信チャネルを同時に受信できるため、無線端末１が使用している通信チャネルに依存せずに位置推定を行うことができる。 Further, since all communication channels can be received simultaneously by the single receiver 3, position estimation can be performed without depending on the communication channel used by the wireless terminal 1.

＜実施形態２＞
次に、本発明の第２の実施形態を、図４乃至図５を参照して説明する。図４は、本実施形態における無線通信システムの構成を示すブロック図であり、図５は、無線通信システムの動作を示すシーケンス図である。 <Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a block diagram showing the configuration of the wireless communication system in the present embodiment, and FIG. 5 is a sequence diagram showing the operation of the wireless communication system.

本実施形態における無線通信システムは、上述した実施形態１で説明したものとほぼ同様の構成を有する。但し、以下の点で、実施形態１のものとは異なる。以下、実施形態１とは異なる点を主に説明する。 The wireless communication system according to the present embodiment has substantially the same configuration as that described in the first embodiment. However, the following points are different from those of the first embodiment. Hereinafter, differences from the first embodiment will be mainly described.

まず、本実施形態における無線端末１が備える無線信号送信部１１は、無線端末１に装備されたセンサにて検出されたセンサ検出情報を無線ＬＡＮ信号に含めて発信する機能（センサ検出情報送信部）を有する。例えば、無線信号送信部１１は、上述したように移動検出センサである加速度センサで検出されたデータをセンサ検出情報として、無線ＬＡＮ信号の実データに含めて送信する。このとき、無線信号送信部１１は、後述するように無線ＬＡＮ基地局２にて送信元を認識できるよう、無線ＬＡＮ信号の実データに無線端末ＩＤも含めて送信する。なお、無線信号送信部１１が送信する無線ＬＡＮ信号のフレーム長は、上述同様に、無線端末１を特定する無線端末ＩＤに対応している。 First, the wireless signal transmission unit 11 included in the wireless terminal 1 according to the present embodiment includes a function of transmitting sensor detection information detected by a sensor installed in the wireless terminal 1 in a wireless LAN signal (sensor detection information transmission unit). ). For example, as described above, the wireless signal transmission unit 11 transmits data detected by an acceleration sensor, which is a movement detection sensor, as sensor detection information included in actual data of a wireless LAN signal. At this time, the wireless signal transmitting unit 11 transmits the wireless LAN signal including the wireless terminal ID so that the wireless LAN base station 2 can recognize the transmission source as will be described later. Note that the frame length of the wireless LAN signal transmitted by the wireless signal transmitter 11 corresponds to the wireless terminal ID that identifies the wireless terminal 1 as described above.

そして、無線端末１から送信されたセンサ検出情報を含む無線ＬＡＮ信号は、無線ＬＡＮ基地局２と複数の受信機３にて受信される。無線ＬＡＮ基地局２は、受信した無線ＬＡＮ信号を復調及び復号し、実データ内に含まれている無線端末ＩＤ及びセンサ検出情報を取得する。そして、取得した無線端末ＩＤ及びセンサ検出情報を、位置推定装置４にネットワークを介して送信する。なお、無線ＬＡＮ基地局２は、無線端末ＩＤ及びセンサ検出情報を位置推定装置４に送信する機能として、装備された演算装置にプログラムが組み込まれることで構築されたセンサ検出情報送信部２１を備える。 A wireless LAN signal including sensor detection information transmitted from the wireless terminal 1 is received by the wireless LAN base station 2 and the plurality of receivers 3. The wireless LAN base station 2 demodulates and decodes the received wireless LAN signal, and acquires the wireless terminal ID and sensor detection information included in the actual data. Then, the acquired wireless terminal ID and sensor detection information are transmitted to the position estimation device 4 via the network. Note that the wireless LAN base station 2 includes a sensor detection information transmission unit 21 constructed by incorporating a program into the equipped arithmetic device as a function of transmitting the wireless terminal ID and sensor detection information to the position estimation device 4. .

さらに、本実施形態における位置推定装置４が備える端末位置推定部４１は、無線ＬＡＮ基地局２から送信された無線端末ＩＤ及びセンサ検出情報を取得すると共に、実施形態１と同様に受信機３から送信された端末関連情報を取得し、これらの情報に基づいて無線端末１の位置を推定する。例えば、端末位置推定部４１は、まず、実施形態１で説明したように端末関連情報から、最も強い「ＲＳＳＩ」を受信した受信機３を特定し、当該受信機３の位置を無線端末１の仮の位置として推定する。そして、無線端末１の仮の位置を、センサ検出情報に基づいて補正する。一例として、センサ検出情報が加速度センサの検出値である場合には、無線端末１の移動方向や移動ベクトルを表す情報を取得して、移動している方向や距離に応じて無線端末１の仮の位置を補正し、最終的な位置を推定する。 Furthermore, the terminal position estimation unit 41 included in the position estimation device 4 in the present embodiment acquires the wireless terminal ID and sensor detection information transmitted from the wireless LAN base station 2 and from the receiver 3 as in the first embodiment. The transmitted terminal related information is acquired, and the position of the wireless terminal 1 is estimated based on the information. For example, the terminal position estimation unit 41 first identifies the receiver 3 that has received the strongest “RSSI” from the terminal-related information as described in the first embodiment, and determines the position of the receiver 3 of the wireless terminal 1. Estimated as a temporary position. And the temporary position of the radio | wireless terminal 1 is correct | amended based on sensor detection information. As an example, when the sensor detection information is a detection value of an acceleration sensor, information indicating the movement direction or movement vector of the wireless terminal 1 is acquired, and the provisional information of the wireless terminal 1 is obtained according to the moving direction or distance. Is corrected and the final position is estimated.

なお、位置推定装置４による位置の推定処理方法は、上述した方法に限定されない。また、上述した無線端末１にて検出されるセンサ検出情報は、上述した情報に限定されず、いかなるセンサで検出された情報であってもよい。 Note that the position estimation processing method performed by the position estimation device 4 is not limited to the above-described method. The sensor detection information detected by the wireless terminal 1 described above is not limited to the information described above, and may be information detected by any sensor.

次に、上述した無線通信システムの動作を、図５のシーケンスを参照して説明する。まず、無線端末１は、装備された移動検出センサで自端末が移動したか否かを検出する（ステップＳ１１）。無線端末１は、移動を検出したことを契機に、自身に割り当てられている無線端末ＩＤに応じた特定の長さを持つ無線ＬＡＮ信号の組である測位信号セットを生成する。このとき、無線端末１は、移動検出センサなどで検出したセンサ検出情報と、自端末の無線端末ＩＤとを、無線ＬＡＮ信号の実データに含める。そして、無線端末１は、無線ＬＡＮ信号を送信する（ステップＳ１２）。 Next, the operation of the above-described wireless communication system will be described with reference to the sequence of FIG. First, the wireless terminal 1 detects whether or not the terminal itself has moved using the equipped movement detection sensor (step S11). The wireless terminal 1 generates a positioning signal set that is a set of wireless LAN signals having a specific length according to the wireless terminal ID assigned to the wireless terminal 1 when the movement is detected. At this time, the wireless terminal 1 includes sensor detection information detected by a movement detection sensor or the like and the wireless terminal ID of the terminal itself in the actual data of the wireless LAN signal. Then, the wireless terminal 1 transmits a wireless LAN signal (step S12).

すると、無線端末１が送信した上記測位信号セット（無線ＬＡＮ信号）の到達範囲内に位置する全ての受信機３、及び、無線ＬＡＮ基地局２が、当該無線端末１が送信した測位信号セットを受信する。但し、無線ＬＡＮ基地局２は、無線端末１が送信した通信チャネルに対応した無線ＬＡＮ基地局２のみが受信する。 Then, all the receivers 3 and the wireless LAN base station 2 that are located within the reach of the positioning signal set (wireless LAN signal) transmitted by the wireless terminal 1 use the positioning signal set transmitted by the wireless terminal 1. Receive. However, the wireless LAN base station 2 receives only the wireless LAN base station 2 corresponding to the communication channel transmitted by the wireless terminal 1.

無線ＬＡＮ基地局２は、受信した無線ＬＡＮ信号を復調及び復号し、実データ内に含まれている無線端末ＩＤ及びセンサ検出情報を取得する。そして、取得した無線端末ＩＤ及びセンサ検出情報を、位置推定装置４にネットワークを介して送信する（ステップＳ１３）。 The wireless LAN base station 2 demodulates and decodes the received wireless LAN signal, and acquires the wireless terminal ID and sensor detection information included in the actual data. Then, the acquired wireless terminal ID and sensor detection information are transmitted to the position estimation device 4 via the network (step S13).

また、各受信機３は、それぞれ受信した無線ＬＡＮ信号の組である測位信号セットを包絡線検波し、その結果として得られた信号長の組から無線端末ＩＤを得る（ステップＳ１４）。また、受信機３は、無線ＬＡＮ信号を受信した際における受信強度であるＲＳＳＩを測定する（ステップＳ１４）。そして、各受信機３は、検出した無線端末ＩＤ及びＲＳＳＩと、自身である受信機３の受信機ＩＤと、を組にして関連付けた端末関連情報を、位置推定装置４にそれぞれ送信する（ステップＳ１５）。 Each receiver 3 envelope-detects a positioning signal set that is a set of received wireless LAN signals, and obtains a wireless terminal ID from a set of signal lengths obtained as a result (step S14). Further, the receiver 3 measures RSSI that is the reception intensity when the wireless LAN signal is received (step S14). Each receiver 3 transmits terminal-related information associated with the detected wireless terminal ID and RSSI and the receiver ID of the receiver 3 as a set to the position estimation device 4 (step). S15).

位置推定装置４は、複数の受信機３からそれぞれ受信した上記端末関連情報から、同一の無線端末ＩＤを含むもののうち、「ＲＳＳＩ」が最も強い端末関連情報を特定し、当該端末関連情報に含まれる受信機ＩＤの位置を、無線端末１の仮の位置として推定する。そして、位置推定装置４は、無線ＬＡＮ基地局２からセンサ検出情報を用いて、無線端末１の仮の位置を補正し、最終的な位置を推定する（ステップＳ１６）。その後、位置推定装置４は、無線端末１の位置の推定結果を、無線ＬＡＮ基地局２及び当該無線ＬＡＮ基地局２を介して無線端末１に通知する（ステップＳ１７，Ｓ１８）。 The position estimation device 4 identifies the terminal-related information having the strongest “RSSI” among those including the same wireless terminal ID from the terminal-related information received from each of the plurality of receivers 3 and includes the information in the terminal-related information. The position of the received receiver ID is estimated as the temporary position of the wireless terminal 1. And the position estimation apparatus 4 correct | amends the temporary position of the radio | wireless terminal 1 using sensor detection information from the wireless LAN base station 2, and estimates a final position (step S16). Thereafter, the position estimation device 4 notifies the wireless terminal 1 of the position estimation result of the wireless terminal 1 via the wireless LAN base station 2 and the wireless LAN base station 2 (steps S17 and S18).

以上のように、本発明によると、上述したように、無線通信システムにおいて無線端末の位置推定を行う場合における、位置推定の精度の向上、消費電力の低下、コストの低下、を図ることができる。 As described above, according to the present invention, as described above, when estimating the position of a wireless terminal in a wireless communication system, it is possible to improve the accuracy of position estimation, reduce power consumption, and reduce cost. .

また、無線端末１が送信する無線ＬＡＮ信号に、所定のセンサにて検出した情報や他の情報を含めて無線ＬＡＮ基地局２に送信することができるため、通信効率の低下を抑制することができる。 In addition, since the wireless LAN signal transmitted by the wireless terminal 1 can be transmitted to the wireless LAN base station 2 including information detected by a predetermined sensor and other information, it is possible to suppress a decrease in communication efficiency. it can.

以上説明した通信システムは、例えば、以下のようなサービスを提供する際に利用することができる。
・在庫管理、入退室管理などの物や人の位置を把握し管理するサービス
・「事前に登録された装置を持つ人のみが、その場所の機器を利用できる」といった、セキュリティ管理サービスのような、物と場所を紐づけたサービス
・「ある地点における室温はｎ度」といった、情報と場所を紐づけたサービス The communication system described above can be used, for example, when providing the following services.
・ Services for grasping and managing the location of objects and people such as inventory management and entrance / exit management ・ Security management services such as “Only people with pre-registered devices can use the equipment at that location”・ Services that link objects and places ・ Services that link information and places, such as “room temperature at a certain point is n degrees”

＜付記＞
上記実施形態の一部又は全部は、以下の付記のようにも記載されうる。以下、本発明における無線通信システム、位置推定方法、受信装置、プログラムの構成の概略を説明する。但し、本発明は、以下の構成に限定されない。 <Appendix>
Part or all of the above-described embodiment can be described as in the following supplementary notes. Hereinafter, an outline of the configuration of the wireless communication system, the position estimation method, the receiving apparatus, and the program according to the present invention will be described. However, the present invention is not limited to the following configuration.

（付記１）
移動体である無線通信端末と、所定範囲に設置され前記無線通信端末から送信された無線信号を受信する複数の受信装置と、前記複数の受信装置と接続され前記無線通信端末の位置推定を行う位置推定装置と、を備え、
前記無線通信端末は、当該無線通信端末を識別する識別情報に対応する信号特性を有する無線信号を送信する無線信号送信部を備え、
前記受信装置は、前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出する端末情報受信部と、前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて前記位置推定装置に送信する端末情報送信部と、を備え、
前記位置推定装置は、前記受信装置から受信した前記無線通信端末の識別情報及び前記受信情報の識別情報に基づいて、前記無線通信端末の位置を推定する端末位置推定部を備えた、
無線通信システム。 (Appendix 1)
A wireless communication terminal that is a mobile body, a plurality of reception devices that are installed in a predetermined range and receive wireless signals transmitted from the wireless communication terminal, and are connected to the plurality of reception devices to estimate the position of the wireless communication terminal A position estimation device,
The wireless communication terminal includes a wireless signal transmission unit that transmits a wireless signal having signal characteristics corresponding to identification information for identifying the wireless communication terminal,
The reception device receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, and detects terminal information reception that detects identification information of the radio communication terminal based on the detected signal characteristic A terminal information transmission unit that associates the identification information of the wireless communication terminal with the identification information that identifies the reception device that is the device, and transmits the identification information to the position estimation device.
The position estimation device includes a terminal position estimation unit that estimates the position of the wireless communication terminal based on the identification information of the wireless communication terminal received from the reception device and the identification information of the reception information.
Wireless communication system.

（付記２）
付記１に記載の無線通信システムであって、
前記受信装置の前記端末情報受信部は、前記無線通信端末から送信された無線信号の信号特性に基づいて前記無線通信端末の識別情報を検出すると共に、当該無線信号の受信強度を検出し、
前記受信装置の前記端末情報送信部は、検出した前記無線通信端末の識別情報及び受信強度を、自身である前記受信装置を識別する識別情報と関連付けて前記位置推定装置に送信し、
前記位置推定装置の前記端末位置推定部は、前記受信装置から受信した相互に関連付けられた、当該受信装置の識別情報と、前記無線通信端末の識別情報及び受信強度と、に基づいて、前記無線通信端末の位置を推定する、
無線通信システム。 (Appendix 2)
The wireless communication system according to attachment 1, wherein
The terminal information receiving unit of the receiving device detects identification information of the wireless communication terminal based on signal characteristics of a wireless signal transmitted from the wireless communication terminal, and detects reception intensity of the wireless signal,
The terminal information transmission unit of the reception device transmits the detected identification information and reception intensity of the wireless communication terminal to the position estimation device in association with identification information for identifying the reception device that is itself,
The terminal position estimation unit of the position estimation device is based on identification information of the reception device, identification information and reception strength of the wireless communication terminal, which are associated with each other, received from the reception device. Estimating the location of the communication terminal,
Wireless communication system.

（付記３）
付記２に記載の無線通信システムであって、
前記位置推定装置の前記端末位置推定部は、前記受信装置から受信した前記無線通信端末の識別情報が同一である情報のうち、前記受信強度に基づいて選定した当該受信強度に関連付けられている識別情報に対応する前記受信装置の位置に基づいて、前記無線通信端末の位置を推定する、
無線通信システム。 (Appendix 3)
The wireless communication system according to attachment 2, wherein
The terminal position estimation unit of the position estimation device has an identification associated with the reception strength selected based on the reception strength among pieces of information having the same identification information of the wireless communication terminal received from the reception device Estimating the position of the wireless communication terminal based on the position of the receiving device corresponding to the information;
Wireless communication system.

（付記４）
付記１乃至３のいずれかに記載の無線通信システムであって、
前記無線通信端末の前記無線信号送信部は、当該無線通信端末の識別情報に対応するフレーム長を有する無線信号を送信し、
前記受信装置の前記端末情報受信部は、前記無線通信端末から送信された無線信号のフレーム長に基づいて当該無線通信端末の識別情報を検出する、
無線通信システム。 (Appendix 4)
A wireless communication system according to any one of appendices 1 to 3,
The wireless signal transmission unit of the wireless communication terminal transmits a wireless signal having a frame length corresponding to the identification information of the wireless communication terminal;
The terminal information receiving unit of the receiving device detects identification information of the wireless communication terminal based on a frame length of a wireless signal transmitted from the wireless communication terminal;
Wireless communication system.

（付記５）
付記１乃至４のいずれかに記載の無線通信システムであって、
前記受信装置は、複数の通信チャネルの無線信号を同時に受信可能である、
無線通信システム。 (Appendix 5)
The wireless communication system according to any one of appendices 1 to 4,
The receiving device can simultaneously receive radio signals of a plurality of communication channels.
Wireless communication system.

（付記６）
付記１乃至５のいずれかに記載の無線通信システムであって、
前記無線通信端末は、自端末の移動を検出する移動検出部を備え、
前記無線通信端末の前記無線信号送信部は、前記移動検出部にて自端末の移動を検出したときに前記無線信号を前記受信装置に送信する、
無線通信システム。 (Appendix 6)
The wireless communication system according to any one of appendices 1 to 5,
The wireless communication terminal includes a movement detection unit that detects movement of the own terminal,
The wireless signal transmitting unit of the wireless communication terminal transmits the wireless signal to the receiving device when the movement detecting unit detects the movement of the own terminal;
Wireless communication system.

（付記７）
付記１乃至６のいずれかに記載の無線通信システムであって、
前記無線通信端末と無線通信を行う無線基地局を備え、
前記無線通信端末の前記無線信号送信部は、当該無線通信端末が装備する所定のセンサにて検出したセンサ検出情報を、当該無線通信端末の識別情報と共に、前記受信装置又は前記無線基地局に送信し、
前記位置推定装置の前記端末位置推定部は、前記受信装置から受信した情報と、前記無線通信端末から受信した情報とに基づいて、前記無線通信端末の位置を推定する、
無線通信システム。 (Appendix 7)
The wireless communication system according to any one of appendices 1 to 6,
A wireless base station that performs wireless communication with the wireless communication terminal,
The wireless signal transmission unit of the wireless communication terminal transmits sensor detection information detected by a predetermined sensor equipped in the wireless communication terminal together with the identification information of the wireless communication terminal to the reception device or the wireless base station. And
The terminal position estimation unit of the position estimation device estimates the position of the wireless communication terminal based on information received from the reception device and information received from the wireless communication terminal;
Wireless communication system.

（付記８）
移動体である無線通信端末と、所定範囲に設置され前記無線通信端末から送信された無線信号を受信する複数の受信装置と、前記複数の受信装置と接続され前記無線通信端末の位置推定を行う位置推定装置と、を備えた無線通信システムにより、前記無線通信端末の位置を推定する位置推定方法であって、
前記無線通信端末が、当該無線通信端末を識別する識別情報に対応する信号特性を有する無線信号を送信し、
前記受信装置が、前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出し、前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて前記位置推定装置に送信し、
前記位置推定装置が、前記受信装置から受信した前記無線通信端末の識別情報及び前記受信情報の識別情報に基づいて、前記無線通信端末の位置を推定する、
位置推定方法。 (Appendix 8)
A wireless communication terminal that is a mobile body, a plurality of reception devices that are installed in a predetermined range and receive wireless signals transmitted from the wireless communication terminal, and are connected to the plurality of reception devices to estimate the position of the wireless communication terminal A position estimation method for estimating a position of the wireless communication terminal by a wireless communication system comprising a position estimation device,
The wireless communication terminal transmits a wireless signal having signal characteristics corresponding to identification information for identifying the wireless communication terminal;
The receiving device receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, detects identification information of the radio communication terminal based on the detected signal characteristic, and In association with the identification information of the communication terminal and the identification information for identifying the receiving device that is itself is transmitted to the position estimation device,
The position estimation device estimates the position of the wireless communication terminal based on the identification information of the wireless communication terminal and the identification information of the reception information received from the reception device;
Position estimation method.

（付記８−２）
付記８に記載の位置推定方法であって、
前記受信装置が、前記無線通信端末から送信された無線信号の信号特性に基づいて前記無線通信端末の識別情報を検出すると共に、当該無線信号の受信強度を検出し、検出した前記無線通信端末の識別情報及び受信強度を、自身である前記受信装置を識別する識別情報と関連付けて前記位置推定装置に送信し、
前記位置推定装置が、前記受信装置から受信した相互に関連付けられた、当該受信装置の識別情報と、前記無線通信端末の識別情報及び受信強度と、に基づいて、前記無線通信端末の位置を推定する、
位置推定方法。 (Appendix 8-2)
The position estimation method according to attachment 8, wherein
The receiving device detects identification information of the wireless communication terminal based on signal characteristics of a wireless signal transmitted from the wireless communication terminal, detects reception intensity of the wireless signal, and detects the detected wireless communication terminal. The identification information and the reception intensity are transmitted to the position estimation device in association with the identification information for identifying the reception device that is itself,
The position estimation device estimates the position of the wireless communication terminal based on the identification information of the reception device, the identification information of the wireless communication terminal, and the reception strength that are associated with each other received from the reception device. To
Position estimation method.

（付記９）
所定範囲に複数設置され、移動体である無線通信端末から送信された無線信号を受信する受信装置であって、
前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出する端末情報受信部と、
前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて、前記無線通信端末の位置推定を行う位置推定装置に送信する端末情報送信部と、
を備えた受信装置。 (Appendix 9)
A receiving device that is installed in a predetermined range and receives a radio signal transmitted from a radio communication terminal that is a mobile body,
A terminal information receiving unit that receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, and detects identification information of the radio communication terminal based on the detected signal characteristic;
A terminal information transmission unit for associating identification information of the wireless communication terminal with identification information for identifying the receiving device that is itself, and transmitting the information to a position estimation device that performs position estimation of the wireless communication terminal;
A receiving device.

（付記９−２）
付記９に記載の受信装置であって、
前記端末情報受信部は、前記無線通信端末から送信された無線信号の信号特性に基づいて前記無線通信端末の識別情報を検出すると共に、当該無線信号の受信強度を検出し、
前記端末情報送信部は、検出した前記無線通信端末の識別情報及び受信強度を、自身である前記受信装置を識別する識別情報と関連付けて前記位置推定装置に送信する、
受信装置。 (Appendix 9-2)
The receiving device according to attachment 9, wherein
The terminal information receiving unit detects identification information of the wireless communication terminal based on signal characteristics of a wireless signal transmitted from the wireless communication terminal, and detects reception intensity of the wireless signal,
The terminal information transmitting unit transmits the detected identification information and reception intensity of the wireless communication terminal to the position estimation device in association with identification information for identifying the receiving device which is the device itself;
Receiver device.

（付記１０）
所定範囲に複数設置され、移動体である無線通信端末から送信された無線信号を受信する受信装置に、
前記無線通信端末から送信された無線信号を受信して当該無線信号の信号特性を検出し、当該検出した信号特性に基づいて前記無線通信端末の識別情報を検出する端末情報受信部と、
前記無線通信端末の識別情報と自身である前記受信装置を識別する識別情報とを関連付けて、前記無線通信端末の位置推定を行う位置推定装置に送信する端末情報送信部と、
を実現させるためのプログラム。 (Appendix 10)
In a receiving device that is installed in a predetermined range and receives a radio signal transmitted from a radio communication terminal that is a mobile body,
A terminal information receiving unit that receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, and detects identification information of the radio communication terminal based on the detected signal characteristic;
A terminal information transmission unit for associating identification information of the wireless communication terminal with identification information for identifying the receiving device that is itself, and transmitting the information to a position estimation device that performs position estimation of the wireless communication terminal;
A program to realize

（付記１０−２）
付記１０に記載のプログラムであって、
前記端末情報受信部は、前記無線通信端末から送信された無線信号の信号特性に基づいて前記無線通信端末の識別情報を検出すると共に、当該無線信号の受信強度を検出し、
前記端末情報送信部は、検出した前記無線通信端末の識別情報及び受信強度を、自身である前記受信装置を識別する識別情報と関連付けて前記位置推定装置に送信する、
プログラム。 (Appendix 10-2)
The program according to attachment 10, wherein
The terminal information receiving unit detects identification information of the wireless communication terminal based on signal characteristics of a wireless signal transmitted from the wireless communication terminal, and detects reception intensity of the wireless signal,
The terminal information transmitting unit transmits the detected identification information and reception intensity of the wireless communication terminal to the position estimation device in association with identification information for identifying the receiving device which is the device itself;
program.

なお、上述したプログラムは、記憶装置に記憶されていたり、コンピュータが読み取り可能な記録媒体に記録されている。例えば、記録媒体は、フレキシブルディスク、光ディスク、光磁気ディスク、及び、半導体メモリ等の可搬性を有する媒体である。 Note that the above-described program is stored in a storage device or recorded on a computer-readable recording medium. For example, the recording medium is a portable medium such as a flexible disk, an optical disk, a magneto-optical disk, and a semiconductor memory.

以上、上記実施形態等を参照して本願発明を説明したが、本願発明は、上述した実施形態に限定されるものではない。本願発明の構成や詳細には、本願発明の範囲内で当業者が理解しうる様々な変更をすることができる。 Although the present invention has been described with reference to the above-described embodiment and the like, the present invention is not limited to the above-described embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

１無線端末
１１無線信号送信部
２無線ＬＡＮ基地局
２１センサ検出情報送信部
３受信機
３１端末情報受信部
３２端末情報送信部
４位置推定装置
４１端末位置推定部
DESCRIPTION OF SYMBOLS 1 Wireless terminal 11 Wireless signal transmission part 2 Wireless LAN base station 21 Sensor detection information transmission part 3 Receiver 31 Terminal information reception part 32 Terminal information transmission part 4 Location estimation apparatus 41 Terminal location estimation part

Claims

A wireless communication terminal that is a mobile body, a plurality of reception devices that are installed in a predetermined range and receive wireless signals transmitted from the wireless communication terminal, and are connected to the plurality of reception devices to estimate the position of the wireless communication terminal A position estimation device, and a wireless base station that performs wireless communication with the wireless communication terminal ,
The wireless communication terminal includes a wireless signal transmission unit that transmits a wireless signal having signal characteristics corresponding to identification information for identifying the wireless communication terminal,
The reception device receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, and detects terminal information reception that detects identification information of the radio communication terminal based on the detected signal characteristic A terminal information transmission unit that associates the identification information of the wireless communication terminal with the identification information that identifies the reception device that is the device, and transmits the identification information to the position estimation device.
The position estimation device based on the identification information of the wireless communication terminal identification information and the receiving apparatus received from the receiving apparatus, Bei give a terminal position estimating unit that estimates a position of the wireless communication terminal,
further,
The wireless signal transmission unit of the wireless communication terminal receives a wireless signal including sensor detection information detected by a predetermined sensor equipped in the wireless communication terminal and identification information of the wireless communication terminal, and the reception device and While transmitting to the radio base station, the radio signal has a frame length corresponding to the identification information of the radio communication terminal,
The terminal information receiving unit of the receiving device detects identification information of the wireless communication terminal based on a frame length of the wireless signal transmitted from the wireless communication terminal, and detects reception intensity of the wireless signal,
The terminal information transmission unit of the reception device transmits the detected identification information and reception intensity of the wireless communication terminal to the position estimation device in association with identification information for identifying the reception device that is itself,
The radio base station acquires identification information of the radio communication terminal and the sensor detection information included in a radio signal transmitted from the radio communication terminal, and transmits the acquired information to the position estimation device.
The terminal position estimation unit of the position estimation device is based on identification information of the reception device, identification information and reception strength of the wireless communication terminal, which are associated with each other, received from the reception device. The temporary position of the communication terminal is estimated, and the temporary position of the wireless communication terminal is corrected based on the identification information of the wireless communication terminal received from the wireless base station and the sensor detection information, and finally Estimating the position,
Wireless communication system.

The wireless communication system according to claim 1 ,
The terminal position estimation unit of the position estimation device has an identification associated with the reception strength selected based on the reception strength among pieces of information having the same identification information of the wireless communication terminal received from the reception device Estimating the position of the wireless communication terminal based on the position of the receiving device corresponding to the information;
Wireless communication system.

The wireless communication system according to claim 1 or 2 ,
The receiving device can simultaneously receive radio signals of a plurality of communication channels.
Wireless communication system.

A wireless communication system according to any one of claims 1 to 3 ,
The wireless communication terminal includes a movement detection unit that detects movement of the own terminal,
The wireless signal transmitting unit of the wireless communication terminal transmits the wireless signal to the receiving device when the movement detecting unit detects the movement of the own terminal;
Wireless communication system.

A wireless communication terminal that is a mobile body, a plurality of reception devices that are installed in a predetermined range and receive wireless signals transmitted from the wireless communication terminal, and are connected to the plurality of reception devices to estimate the position of the wireless communication terminal A position estimation method for estimating a position of the wireless communication terminal by a wireless communication system including a position estimation device and a wireless base station that performs wireless communication with the wireless communication terminal,
The wireless communication terminal transmits a wireless signal having signal characteristics corresponding to identification information for identifying the wireless communication terminal;
The receiving device receives a radio signal transmitted from the radio communication terminal, detects a signal characteristic of the radio signal, detects identification information of the radio communication terminal based on the detected signal characteristic, and In association with the identification information of the communication terminal and the identification information for identifying the receiving device that is itself is transmitted to the position estimation device,
The position estimation device estimates the position of the wireless communication terminal based on the identification information of the wireless communication terminal received from the reception device and the identification information of the reception device ,
further,
The wireless communication terminal transmits a wireless signal including sensor detection information detected by a predetermined sensor equipped in the wireless communication terminal and identification information of the wireless communication terminal to the receiving device and the wireless base station. And the radio signal has a frame length corresponding to the identification information of the radio communication terminal,
The receiving device detects the identification information of the wireless communication terminal based on the frame length of the wireless signal transmitted from the wireless communication terminal, and detects the reception strength of the wireless signal,
The reception device transmits the detected identification information and reception intensity of the wireless communication terminal to the position estimation device in association with the identification information for identifying the reception device that is itself,
The wireless base station acquires the identification information of the wireless communication terminal and the sensor detection information included in the wireless signal transmitted from the wireless communication terminal, and transmits to the position estimation device,
Based on the identification information of the reception device, the identification information of the wireless communication terminal, and the reception strength, which are associated with each other, received by the position estimation device from the reception device, And estimating the temporary position of the wireless communication terminal based on the identification information of the wireless communication terminal received from the wireless base station and the sensor detection information to estimate the final position,
Position estimation method.