JPH0870481A - Terminal position management system for digital cordless communication system - Google Patents
Terminal position management system for digital cordless communication systemInfo
- Publication number
- JPH0870481A JPH0870481A JP6204810A JP20481094A JPH0870481A JP H0870481 A JPH0870481 A JP H0870481A JP 6204810 A JP6204810 A JP 6204810A JP 20481094 A JP20481094 A JP 20481094A JP H0870481 A JPH0870481 A JP H0870481A
- Authority
- JP
- Japan
- Prior art keywords
- base station
- terminal
- electric field
- zone
- base stations
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0252—Radio frequency fingerprinting
- G01S5/02521—Radio frequency fingerprinting using a radio-map
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、事業所等の構内で使用
されるデジタルコードレス通信システムに関し、特に端
末の位置を特定する端末位置管理方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital cordless communication system used in a premises such as an office, and more particularly to a terminal location management system for identifying the location of a terminal.
【０００２】[0002]
【従来の技術】従来例としては、特開平２−４４９２９
号公報に記載される移動体位置検出方法がある。この方
法は、基地局送信波の移動局における電界強度レベルと
電界強度地図とを照合して、エリア内に存在する移動局
の位置を検出することにより、大きな設備投資をせず
に、移動局の位置を無線ゾーン単位よりも高精度に検出
可能にするものである。2. Description of the Related Art As a conventional example, Japanese Patent Laid-Open No. 2-44929 is known.
There is a moving body position detection method described in Japanese Patent Publication No. This method detects the position of a mobile station existing in the area by comparing the electric field strength level of the base station transmitted wave in the mobile station with the electric field strength map, and thus the mobile station does not require a large capital investment. The position can be detected with higher accuracy than in units of wireless zones.
【０００３】しかしながら、この例の方法は自動車電話
方式等の移動体通信方式のように基地局等の出力が大き
い場合に適用可能であると考えられる。上記移動体位置
検出方法による従来例を図２に示し、以下にその説明を
行う。However, it is considered that the method of this example is applicable to the case where the output of the base station or the like is large as in a mobile communication system such as a car telephone system. A conventional example of the moving body position detecting method is shown in FIG. 2 and will be described below.
【０００４】基地局（Ｂ１）２１、基地局（Ｂ２）２
２、基地局（Ｂ３）２３は互いに隣接する基地局として
設置されており、各基地局２１〜２３について予め電界
強度（例えば３０，５０，…ｄＢμＶ／ｍ）の等電界曲
線が求められている。この等電界曲線は各基地局２１〜
２３と移動局１０の間で電波を実際に受信して求める。Base station (B1) 21 and base station (B2) 2
2. The base station (B3) 23 is installed as a base station adjacent to each other, and an isoelectric field curve of electric field strength (for example, 30, 50, ... dB μV / m) is obtained in advance for each of the base stations 21 to 23. . This isoelectric field curve is calculated by each base station 21-
The radio wave is actually received between the mobile station 23 and the mobile station 10 to obtain it.
【０００５】移動局１０がある位置にいるとき、移動局
１０において基地局（Ｂ１）２１からの受信電界レベル
と基地局（Ｂ２）２２からの受信電界レベルと基地局
（Ｂ３）２３からの受信電界レベルとを測定し、それぞ
れの基地局からの受信電界レベルの測定結果を最寄りの
基地局に送信する。When the mobile station 10 is at a certain position, the mobile station 10 receives the electric field level from the base station (B1) 21, the electric field level from the base station (B2) 22, and the electric field from the base station (B3) 23. The electric field level is measured, and the measurement result of the electric field level received from each base station is transmitted to the nearest base station.
【０００６】測定結果を得た結果を予め算出してある等
電界曲線に照らし合わせることで移動局１０の位置が判
明するが、測定結果は位置管理センター（図示せず）か
らの移動局１０への着信により位置管理センターへ送ら
れるか、移動局１０から位置管理センターへの発信によ
り位置管理センターに送られる。The position of the mobile station 10 is found by comparing the obtained measurement result with a pre-calculated isoelectric field curve. The measurement result is sent to the mobile station 10 from a location management center (not shown). Is sent to the location management center by an incoming call, or sent from the mobile station 10 to the location management center.
【０００７】以上述べた従来の位置管理方式は、自動車
電話に代表される移動体通信方式のように、基地局の出
力が大きく、ゾーンのカバーする範囲が広く、位置の特
定精度が粗い状況でもよい場合に有効である。The conventional position management system described above, even when the output of the base station is large, the range covered by the zone is wide, and the position specifying accuracy is rough, like the mobile communication system represented by a car telephone. Effective when good.
【０００８】しかしながら、事業所等の構内で使用する
デジタルコードレス通信システムでは、基地局等の出力
が小さく、ゾーンのカバーする範囲も狭いため、位置の
特定精度が密である必要がある。さらに、屋内等におい
ては建物の構造やインテリアによりゾーンが円形となら
ない場合が大半であり、等電界曲線による位置予測では
位置を細かく確定できないという欠点がある。However, in a digital cordless communication system used in a premises such as a business office, the output of the base station is small and the range covered by the zone is narrow, so that it is necessary to have a high position specifying accuracy. Further, in most cases, the zone is not circular due to the structure and interior of the building indoors, and there is a drawback that the position cannot be finely determined by position prediction based on the isoelectric field curve.
【０００９】また、従来の方式では、移動局で測定結果
を蓄積する方法であるため、位置管理センターから移動
局の呼び出しないし移動局から管理センターへの呼び出
しを行わない限り、測定結果がタイムリーに入手できな
いという欠点があった。Further, since the conventional method is a method of accumulating the measurement results in the mobile station, unless the location management center calls the mobile station or the mobile station calls the management center, the measurement result is timely. It had the drawback that it was not available.
【００１０】[0010]
【発明が解決しようとする課題】以上述べたように、従
来の位置管理方式は、自動車電話方式等の移動体通信方
式に採用されるもので、基地局等の出力が大きく、ゾー
ンのカバーする範囲が広く、位置の特定精度が粗い状況
でもよい場合に限られ、構内に構築されたデジタルコー
ドレス通信システムのように、基地局等の出力が小さ
く、ゾーンのカバーする範囲も狭く、位置の特定精度が
密である必要のあるシステムには適用できないという欠
点があった。As described above, the conventional position management system is adopted in the mobile communication system such as the car telephone system and has a large output from the base station and covers the zone. Limited to situations where the range is wide and the position identification accuracy is rough, the output of the base station etc. is small and the range covered by the zone is narrow, such as in a digital cordless communication system built on the premises. It has a drawback that it cannot be applied to a system that requires high precision.
【００１１】さらに、屋内等においては建物の構造やイ
ンテリアによりゾーンが円形とならない場合が大半であ
り、等電界曲線による位置予測では位置を細かく確定で
きないという欠点があった。Further, in most cases indoors, the zone is not circular due to the structure and interior of the building, and there is a drawback that the position cannot be finely determined by the position prediction based on the isoelectric field curve.
【００１２】また、移動局で測定結果を蓄積する方法で
あるため、管理センターから移動局の呼び出しないし移
動局から管理センターへの呼び出しを行わない限り、測
定結果がタイムリーに入手できないという欠点があっ
た。Further, since the mobile station stores the measurement results, the measurement results cannot be obtained in a timely manner unless the management center calls the mobile station or the mobile station calls the management center. there were.
【００１３】本発明は上記の課題を解決するためになさ
れたもので、構内に構築されたシステムであっても、端
末の位置特定精度を密にして細かく確定することがで
き、しかも位置確定のための電界強度測定結果をタイム
リーに入手可能なデジタルコードレス通信システムの端
末位置管理方式を提供することを目的とする。The present invention has been made in order to solve the above problems. Even in a system built on a premises, it is possible to finely determine the position identification accuracy of a terminal and to determine the position. It is an object of the present invention to provide a terminal location management method for a digital cordless communication system, in which the electric field strength measurement results can be obtained in a timely manner.
【００１４】[0014]
【課題を解決するための手段】上記目的を達成するため
に本発明に係るデジタルコードレス通信システムの端末
位置管理方式は、構内に分散して配置され、デジタルコ
ードレスにより端末との通信を行う複数の基地局と、こ
れらの複数の基地局間の通信及び外部との通信を制御す
る交換機とを備えるデジタルコードレス通信システムに
おいて、前記複数の基地局は、それぞれ前記端末が電源
オン時に登録される基地局を中心に他の隣接する基地局
の電波が十分に受信できる程度に電波状況が互いに重な
り合うように配置され、前記端末は、電源オン時に登録
される基地局及び他の隣接する基地局の電波を受信して
それぞれの基地局からの電界強度レベルを測定し、制御
チャネルを介して各基地局へ送出する機能を備え、前記
複数の基地局は、それぞれ前記端末で測定された電界強
度レベルを前記交換機に送出する機能を備え、前記交換
機は、予め各基地局がカバーするゾーン内の実測結果を
収容するデータベースを備え、各基地局からの測定結果
について前記データベースを参照して前記端末の位置の
確認をする機能を備えるようにしたものである。In order to achieve the above-mentioned object, a terminal location management system for a digital cordless communication system according to the present invention has a plurality of terminals which are dispersed in a premises and communicate with terminals by digital cordless. In a digital cordless communication system including a base station and an exchange that controls communication between the plurality of base stations and communication with the outside, each of the plurality of base stations is a base station registered when the terminal is powered on. Is placed so that the radio wave conditions overlap each other to the extent that the radio waves of other adjacent base stations can be sufficiently received, and the terminal monitors the radio waves of the base station and other adjacent base stations registered when the power is turned on. It has a function of receiving and measuring the electric field strength level from each base station, and sending out to each base station via a control channel, the plurality of base stations, Each of the terminals has a function of sending the electric field strength level measured by the terminal to the exchange, and the exchange has a database for accommodating the actual measurement result in the zone covered by each base station in advance, With respect to the measurement result, a function of confirming the position of the terminal with reference to the database is provided.
【００１５】[0015]
【作用】上記構成によるデジタルコードレス通信システ
ムの端末位置管理方式では、端末側でそれぞれの基地局
からの電界強度を測定して各基地局を介して交換機に送
出し、交換機側で予め電界強度地図が登録されたデータ
ベースを参照することにより、端末の位置を特定するよ
うにしている。In the terminal location management system of the digital cordless communication system having the above-mentioned configuration, the terminal side measures the electric field strength from each base station and sends it to the exchange through each base station, and the exchange side preliminarily maps the electric field strength. The location of the terminal is specified by referring to the registered database.
【００１６】[0016]
【実施例】以下、図１を参照して本発明の一実施例を詳
細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIG.
【００１７】図１は本発明に係る端末位置管理方式を用
いたデジタルコードレス通信システムの構成を示すもの
である。交換機４は、端末（ＰＳ）との通信用に基地局
（ＢＳ）を有している。仮に、交換機４にはＡゾーン基
地局１、Ｂゾーン基地局２、Ｃゾーン基地局３が接続さ
れ、端末５はＢゾーン内Ｂ０点に存在するものとし、端
末５の電源オン時にＢゾーン基地局２に登録されるもの
とする。また、交換機４は、予め端末５の位置を特定す
るためのデータベース６を有している。FIG. 1 shows the configuration of a digital cordless communication system using the terminal location management system according to the present invention. The exchange 4 has a base station (BS) for communication with a terminal (PS). It is assumed that the exchange 4 is connected to the A-zone base station 1, the B-zone base station 2, and the C-zone base station 3, and the terminal 5 is present at the B0 point in the B-zone. It shall be registered at station 2. Further, the exchange 4 has a database 6 for specifying the position of the terminal 5 in advance.
【００１８】データベース６は基地局１〜３の置局設計
時に、例えばオフィス内の部屋等をメッシュ状に分けて
各ポイントにおける電界強度を測定し、このポイント毎
に基地局１〜３の各電界強度の値を収容する構成となっ
ている。The database 6 measures the electric field strength at each point by dividing a room in an office into a mesh shape when designing station placement of the base stations 1 to 3, and each electric field of the base stations 1 to 3 is measured at each point. It is configured to accommodate the strength value.
【００１９】ここで、Ｂ０点は、Ａゾーン基地局１、Ｂ
ゾーン基地局２、Ｃゾーン基地局３から十分電界強度を
測定できる電波状況が重なってる範囲とする。Here, the B0 point is the A zone base station 1, B
It is set as a range in which the radio wave conditions in which the electric field strengths can be sufficiently measured overlap from the zone base station 2 and the C zone base station 3.
【００２０】端末５は、着信による電源オン時に、登録
されたＢゾーン基地局２を中心に隣接するゾーンを含め
たＡゾーン基地局１、Ｂゾーン基地局２、Ｃゾーン基地
局３からの各電波を受信し、それぞれから受信した電界
強度を測定する。When the terminal 5 is powered on by the incoming call, each of the A zone base station 1, the B zone base station 2, and the C zone base station 3 including the adjacent zones centering on the registered B zone base station 2 is used. Radio waves are received, and the electric field strength received from each is measured.
【００２１】仮にＡゾーン基地局１から受信する電波の
電界強度が２０ｄＢ、Ｂゾーン基地局２から受信する電
波の電界強度が４０ｄＢ、Ｃゾーン基地局３から受信す
る電波の電界強度が５ｄＢであったとすると、端末５は
それぞれの基地局１〜３から受信した電界強度レベルを
それぞれの基地局に対して送出する。It is assumed that the electric field strength of the electric wave received from the A zone base station 1 is 20 dB, the electric field strength of the electric wave received from the B zone base station 2 is 40 dB, and the electric field strength of the electric wave received from the C zone base station 3 is 5 dB. Then, the terminal 5 sends the electric field strength levels received from the respective base stations 1 to 3 to the respective base stations.
【００２２】電界強度レベルを受信した基地局１〜３
は、それぞれ受信したレベルを交換機４に送出する。交
換機４は、端末５の位置を特定するためのデータベース
６に従い、Ａゾーン電界強度２０ｄＢ、Ｂゾーン電界強
度４０ｄＢ、Ｃゾーン電界強度５ｄＢに相当する位置を
検索する。これによって、端末５がＢゾーン内Ｂ０地点
に存在することを特定することができる。Base stations 1 to 3 that have received the electric field strength level
Sends the received levels to the exchange 4. The exchange 4 searches the position corresponding to the A zone electric field strength 20 dB, the B zone electric field strength 40 dB, and the C zone electric field strength 5 dB according to the database 6 for specifying the position of the terminal 5. As a result, it can be specified that the terminal 5 exists at the B0 point in the B zone.
【００２３】したがって、上記構成による端末位置管理
方式を採用すれば、無線ゾーン内の各ポイントにおける
電界強度の実測値についてデータベースに収容される電
界強度値を参照するようにしているので、より正確に端
末位置を確認特定することができる。Therefore, if the terminal position management system having the above-mentioned configuration is adopted, the electric field strength value stored in the database is referred to for the actual measured value of the electric field strength at each point in the wireless zone. The terminal position can be confirmed and specified.
【００２４】また、端末における各基地局の電界強度の
測定を着信時に行う方式をとっているので、測定のため
の特別な発信、着信が不要となり、交換機側の不要なト
ラヒックは発生しないという効果が得られる。Further, since the electric field strength of each base station in the terminal is measured at the time of incoming call, no special outgoing or incoming call for measurement is required, and unnecessary traffic on the exchange side does not occur. Is obtained.
【００２５】さらに、測定時間は着信時に端末が応答に
要する時間のみであり、必ず端末の使用者が現地にいる
時であるから、位置情報をタイムリーに知ることができ
る。さらにまた、端末が電界強度を測定した際に基地局
がデータを吸い上げる方式であるので、端末内に電界強
度測定結果を収容するメモリ及びこのデータを保持する
ためのバックアップ電池を設ける必要がなく、測定結果
が電池切れ等により消失することがないという利点もあ
る。Furthermore, the measurement time is only the time required for the terminal to respond when an incoming call arrives, and since the user of the terminal is always on site, the position information can be known in a timely manner. Furthermore, since the base station absorbs the data when the terminal measures the electric field strength, it is not necessary to provide a memory for accommodating the electric field strength measurement result and a backup battery for holding this data in the terminal, There is also an advantage that the measurement result does not disappear due to battery exhaustion.
【００２６】尚、本発明は上記実施例に限定されるもの
ではなく、本発明の要旨を逸脱しない範囲で種々変形し
ても同様に実施可能であることはいうまでもない。Needless to say, the present invention is not limited to the above-mentioned embodiments, and can be similarly implemented even if various modifications are made without departing from the gist of the present invention.
【００２７】[0027]
【発明の効果】以上述べたように本発明によれば、構内
に構築されたシステムであっても、端末の位置特定精度
を密にして細かく確定することができ、しかも位置確定
のための電界強度測定結果をタイムリーに入手可能なデ
ジタルコードレス通信システムの端末位置管理方式を提
供することができる。As described above, according to the present invention, even in a system built on a premises, it is possible to finely determine the position identification accuracy of a terminal and to determine an electric field for position determination. It is possible to provide a terminal location management system for a digital cordless communication system in which strength measurement results can be obtained in a timely manner.
【図１】本発明の一実施例に係る端末位置管理方式を用
いたデジタルコードレス通信システムを示すシステム構
成図である。FIG. 1 is a system configuration diagram showing a digital cordless communication system using a terminal location management system according to an embodiment of the present invention.
【図２】従来の移動体通信システムに用いられる位置管
理方式の原理説明図である。FIG. 2 is an explanatory diagram of the principle of a position management system used in a conventional mobile communication system.
１ Ａゾーン基地局 ２ Ｂゾーン基地局 ３ Ｃゾーン基地局 ４ 交換機 ５ 端末 ６ データベース １０ 移動局 ２１ 基地局Ｂ１ ２２ 基地局Ｂ２ ２３ 基地局Ｂ３ 1 A-zone base station 2 B-zone base station 3 C-zone base station 4 Switch 5 Terminal 6 Database 10 Mobile station 21 Base station B1 22 Base station B2 23 Base station B3
Claims (2)
ドレスにより端末との通信を行う複数の基地局と、これ
らの複数の基地局間の通信及び外部との通信を制御する
交換機とを備えるデジタルコードレス通信システムの端
末位置管理方式において、 前記複数の基地局は、それぞれ前記端末が電源オン時に
登録される基地局を中心に他の隣接する基地局の電波が
十分に受信できる程度に電波状況が互いに重なり合うよ
うに配置され、 前記端末は、電源オン時に登録される基地局及び他の隣
接する基地局の電波を受信してそれぞれの基地局からの
電界強度レベルを測定し、制御チャネルを介して各基地
局へ送出する機能を備え、 前記複数の基地局は、それぞれ前記端末で測定された電
界強度レベルを前記交換機に送出する機能を備え、 前記交換機は、予め各基地局がカバーするゾーン内の実
測結果を収容するデータベースを備え、各基地局からの
測定結果について前記データベースを参照して前記端末
の位置の確認をする機能を備えることを特徴とするデジ
タルコードレス通信システムの端末位置管理方式。1. A digital system comprising a plurality of base stations distributed in a premises and communicating with terminals in a digital cordless manner, and a switchboard for controlling communication between the plurality of base stations and communication with the outside. In the terminal location management system of the cordless communication system, the plurality of base stations have radio wave conditions such that the radio waves of other adjacent base stations centering on the base station registered when the terminal is powered on are sufficiently received. The terminals are arranged so as to be overlapped with each other, the terminal receives radio waves of the base station and other adjacent base stations registered when the power is turned on, measures the electric field strength level from each base station, and transmits via the control channel. A plurality of base stations, each of the plurality of base stations having a function of transmitting the electric field strength level measured by the terminal to the exchange; The machine is provided with a database for accommodating actual measurement results in a zone covered by each base station in advance, and is provided with a function for confirming the position of the terminal by referring to the database for the measurement result from each base station. Terminal location management method for digital cordless communication system.
を着信時に行うようにしたことを特徴とする請求項１記
載のデジタルコードレス通信システムの端末位置管理方
式。2. The terminal location management system for a digital cordless communication system according to claim 1, wherein the terminal measures the electric field strength of each base station when receiving a call.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6204810A JPH0870481A (en) | 1994-08-30 | 1994-08-30 | Terminal position management system for digital cordless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6204810A JPH0870481A (en) | 1994-08-30 | 1994-08-30 | Terminal position management system for digital cordless communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0870481A true JPH0870481A (en) | 1996-03-12 |
Family
ID=16496751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6204810A Withdrawn JPH0870481A (en) | 1994-08-30 | 1994-08-30 | Terminal position management system for digital cordless communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0870481A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11211807A (en) * | 1998-01-29 | 1999-08-06 | Nippon Telegr & Teleph Corp <Ntt> | Moving route identifying method, system, and memory medium storing moving route identifying program |
| EP1022578A2 (en) * | 1999-01-20 | 2000-07-26 | Matsushita Electric Industrial Co., Ltd. | Apparatus utilizing radio signal strength for estimating current position of the mobile |
| JP2009044394A (en) * | 2007-08-08 | 2009-02-26 | Hitachi Plant Technologies Ltd | Radio information communication system |
-
1994
- 1994-08-30 JP JP6204810A patent/JPH0870481A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11211807A (en) * | 1998-01-29 | 1999-08-06 | Nippon Telegr & Teleph Corp <Ntt> | Moving route identifying method, system, and memory medium storing moving route identifying program |
| EP1022578A2 (en) * | 1999-01-20 | 2000-07-26 | Matsushita Electric Industrial Co., Ltd. | Apparatus utilizing radio signal strength for estimating current position of the mobile |
| EP1022578A3 (en) * | 1999-01-20 | 2003-01-02 | Matsushita Electric Industrial Co., Ltd. | Apparatus utilizing radio signal strength for estimating current position of the mobile |
| JP2009044394A (en) * | 2007-08-08 | 2009-02-26 | Hitachi Plant Technologies Ltd | Radio information communication system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011106 |