JP3379079B2 - Microcell mobile communication system portable terminal position detection method - Google Patents
Microcell mobile communication system portable terminal position detection methodInfo
- Publication number
- JP3379079B2 JP3379079B2 JP19454196A JP19454196A JP3379079B2 JP 3379079 B2 JP3379079 B2 JP 3379079B2 JP 19454196 A JP19454196 A JP 19454196A JP 19454196 A JP19454196 A JP 19454196A JP 3379079 B2 JP3379079 B2 JP 3379079B2
- Authority
- JP
- Japan
- Prior art keywords
- base station
- portable terminal
- wireless
- wireless base
- mobile terminal
- 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.)
- Expired - Lifetime
Links
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、マイクロセル無
線方式の移動通信における携帯端末の位置を検出する方
法に関するものである。
【０００２】
【従来の技術】図５は、マイクロセル無線方式を用いた
移動通信システムにおいて、携帯端末の位置を検出する
従来の方法を実行するシステムの構成を示す。マイクロ
セル方式は、周波数有効利用のため無線ゾーン（セル）
半径を数１００ｍ程度として同一周波数を繰り返し使用
する方式であり、無線基地局が携帯端末に回線接続する
ためには携帯端末との距離は数１００ｍ程度以内である
必要があり、携帯端末が無線ゾーン（セル）を出た場合
には移動先無線ゾーン（セル）の無線基地局を使って接
続しなければならない。このため携帯端末に回線接続す
ることにより接続した無線基地局の設置位置を知ること
により携帯端末の位置を検出できる。
【０００３】図５において無線基地局１Ａは自無線ゾー
ン２Ａ内に位置する携帯端末３Ａとの間の通信を行うも
のであり、無線電波を送受信することにより音声データ
および制御データの送受信を行う。接続装置４内のイン
ターフェース回路５は、公衆網６と無線回線制御回路７
との接続を行うものであり、無線回線制御回路７は、携
帯端末３からの発呼により携帯端末３と公衆網６を接続
し、公衆網６からの着呼により携帯端末３を呼び出して
接続するものである。呼出制御回路８は一定時間おきに
複数の無線基地局１Ａ，１Ｂ…を順次使うことにより携
帯端末３を呼出し、携帯端末３に電波が届いて応答があ
った場合にその受信無線基地局１の無線ゾーン２に携帯
端末３が位置することを検出する。この関係を記憶回路
９に記憶し、記憶回路９は、複数の無線基地局および複
数の携帯端末を番号管理し、携帯端末に接続可能な無線
基地局番号を記憶する。携帯端末が位置する無線ゾーン
は表示回路１０に表示される。
【０００４】図５では、携帯端末３Ａが無線基地局１Ａ
の無線ゾーン２Ａに位置し無線基地局１Ａとは通話可能
距離で、無線基地局１Ｂとは通話不能である場合を示し
ている。無線基地局１Ａから携帯端末３Ａを呼び出し携
帯端末３Ａから応答があった場合には、記憶回路９は無
線基地局１Ａが携帯端末３Ａと接続でき無線基地局１Ａ
の位置する無線ゾーン（マイクロセル）２Ａに携帯端末
３Ａが位置することを記憶する。次に無線基地局１Ｂか
ら携帯端末３Ａを呼び出して応答が無かった場合には、
記憶回路９は、無線基地局１Ｂが携帯端末３Ａと接続で
きなかったことを記憶する。
【０００５】次に、図５中の携帯端末３ＡＢは、無線基
地局１Ａおよび無線基地局１Ｂの両無線ゾーン２Ａ，２
Ｂ内に位置する場合であり、無線基地局１Ａおよび無線
基地局１Ｂとも携帯端末３ＡＢに通話可能距離に位置す
る。この場合は、記憶回路９は無線基地局１Ａおよび無
線基地局１Ｂともに携帯端末３ＡＢに接続できたことを
記憶する。従って携帯端末３ＡＢは、無線基地局１Ａお
よび無線基地局１Ｂのどちらかの無線ゾーンに位置する
ことは検出できるがどちらに近いかは特定できないため
正確な位置検出ができなかった。
【０００６】
【発明が解決しようとする課題】一般にマイクロセル無
線方式では、電波の不感地帯を無くすため無線ゾーンを
オーバーラップさせることにより、無線基地局から離れ
た無線ゾーンの周辺で携帯端末の受信入力が弱くなり、
無線基地局との回線接続ができなくなった場合に他の無
線基地局に接続できるようにされてある。図５の構成
で、携帯端末３ＡＢは無線ゾーン２Ａ，２Ｂの中間位置
に移動しているため、携帯端末３ＡＢには無線基地局１
Ａおよび無線基地局１Ｂの両方から接続できる。このた
め、従来の構成では、携帯端末に接続できる無線基地局
として複数台の無線基地局が検出される場合があるが、
携帯端末がいずれの無線基地局に最も近いかは特定でき
なかった。
【０００７】この発明の目的は、マイクロセル無線方式
において携帯端末の位置を高精度に検出することができ
る方法を提供することにある。
【０００８】
【課題を解決するための手段】この発明は、複数の無線
基地局を介して携帯端末を順次呼び出し、送信データ信
号と無線基地局で受信される受信データ信号とを比較し
て送受遅延時間を測定して記憶することにより、接続可
能な複数の無線基地局と、無線基地局および携帯端末間
の伝搬遅延時間からの距離を算出し携帯端末の位置検出
をする。
【０００９】
【発明の実施の形態】参考例のシステム構成を図１に示
し、図５と対応する部分に同一符号を付けてある。無線
基地局１Ａ，１Ｂはそれぞれ送信機１１、受信機１２、
変調器１３、復調器１４、ベースバンド回路１５および
伝搬遅延時間測定回路２１により構成される。３は携帯
端末であり、無線基地局と無線回線により通信データを
送受信する。
【００１０】一例として無線基地局１Ａから携帯端末３
Ａを呼び出して応答があった場合には無線基地局１Ａの
無線ゾーン２Ａに携帯端末３Ａが位置するものと検出す
る。その際、無線基地局１Ａの伝搬遅延時間測定回路２
１は、送信データと携帯端末３Ａより送信されて受信し
た受信データとを比較して携帯端末３Ａと無線基地局１
Ａの伝搬遅延時間を測定する。記憶回路２２は、複数の
無線基地局および複数の携帯端末を番号管理し、携帯端
末に接続可能な無線基地局番号と通話中の携帯端末の伝
搬遅延時間を記憶する。記憶回路２２に書き込まれた無
線基地局の管理番号に対応する位置から伝搬遅延時間に
相当する距離を考慮して携帯端末の位置を演算回路２３
で演算して求める。
【００１１】図２は、伝搬遅延時間を測定するＰＨＳの
場合のフレーム構成の説明図である。ＰＨＳは、送信４
タイムスロットＴＸ１〜ＴＸ４、受信４タイムスロット
ＲＸ１〜ＲＸ４の４チャネルＴＤＭＡ−ＴＤＤ方式であ
り、ＴＤＭＡフレーム長は５ｍｓである。１携帯端末と
の通信には送信バースト、例えばＴＸ１と、その送信バ
ーストＴＸ１から２．５ｍｓの送受遅延時間を有する受
信バーストＲＸ１を使用する。携帯端末では、無線基地
局の送信バーストＴＸ１を受信してＴＤＭＡフレームの
タイミングを検出して２．５ｍｓ遅延させて無線基地局
に向けてＲＸ１のタイムスロットで送信する。無線基地
局では、送信バーストＴＸ１と受信バーストＲＸ１の遅
延時間差は、２．５ｍｓ送受遅延時間と無線基地局と携
帯端末の伝搬遅延時間の往復分だけ遅延する。このため
送受信バーストＴＸ１とＲＸ１のデータを比較すること
により伝搬遅延時間を測定できる。ＴＸ２〜ＴＸ４およ
びＲＸ２〜ＲＸ４は別の携帯端末で使用する送受信タイ
ムスロットである。
【００１２】図３は、ＰＨＳの通話用スロットのフレー
ム構成を示し、過渡応答用ランプタイムＲを先頭に、ス
タートシンボルＳＳ、プリアンプルＰＲ、同期ワード
（ユニークワード）ＵＷ、情報ビットＩ、誤り検出符号
ＣＲＣよりなる。送受信データに含まれているユニーク
ワードパタンＵＷを一致比較してユニークワード位置を
検出して送受遅延時間を測定することにより伝搬遅延時
間を測定できる。
【００１３】図４は、この発明の実施例を示し、図１と
対応する部分に同一符号を付けてある。無線基地局１Ａ
は、送信機３１と、受信機３２と、光電気（Ｏ／Ｅ）変
換器４１と、電気光（Ｅ／Ｏ）変換器４２とから構成さ
れ、集中制御局２０と光ファイバで接続され、集中制御
局２０は変調器３３と、復調器３４と、ベースバンド処
理回路３５、伝搬遅延時間を測定する遅延測定器２１、
光電気（Ｏ／Ｅ）変換器４１と、電気光（Ｅ／Ｏ）変換
器４２から構成される。遅延時間測定を集中制御局で行
うことができるため、無線基地局と記憶回路２２の間で
遅延データ信号を伝送する制御線が不要であることが参
考例と異なる。
【００１４】
【発明の効果】以上説明したように、この発明は、複数
の無線基地局を介して携帯端末を順次呼出し通信を行い
無線基地局で受信される受信データを送信データと比較
することにより伝搬遅延時間を測定して接続可能な複数
の無線基地局からの距離を測定し携帯端末の位置を高精
度に位置検出することができる。Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for detecting the position of a portable terminal in mobile communication using a microcell radio system. 2. Description of the Related Art FIG. 5 shows a configuration of a system for executing a conventional method for detecting a position of a portable terminal in a mobile communication system using a microcell radio system. The microcell method uses a wireless zone (cell) for effective use of frequency.
This method uses the same frequency repeatedly with a radius of about several hundred meters. In order for a wireless base station to connect to a line with a mobile terminal, the distance from the mobile terminal must be within several hundred meters. When leaving the (cell), a connection must be made using the wireless base station in the destination wireless zone (cell). For this reason, the position of the mobile terminal can be detected by knowing the installation position of the connected wireless base station by connecting the line to the mobile terminal. [0005] In FIG. 5, a radio base station 1A communicates with a portable terminal 3A located in its own radio zone 2A, and transmits and receives voice data and control data by transmitting and receiving radio waves. The interface circuit 5 in the connection device 4 includes a public network 6 and a radio line control circuit 7.
The wireless line control circuit 7 connects the mobile terminal 3 to the public network 6 by calling from the mobile terminal 3, and calls and connects the mobile terminal 3 by an incoming call from the public network 6. Is what you do. The call control circuit 8 calls the portable terminal 3 by sequentially using the plurality of radio base stations 1A, 1B,... At predetermined time intervals, and when a radio wave reaches the portable terminal 3 and there is a response, the reception radio base station 1 It detects that the portable terminal 3 is located in the wireless zone 2. This relationship is stored in the storage circuit 9, and the storage circuit 9 manages the numbers of the plurality of wireless base stations and the plurality of mobile terminals, and stores the numbers of the wireless base stations connectable to the mobile terminals. The wireless zone where the portable terminal is located is displayed on the display circuit 10. In FIG. 5, a portable terminal 3A is a wireless base station 1A.
Is located in a wireless zone 2A of the wireless base station 1A, and is in a communicable distance with the wireless base station 1A, and cannot communicate with the wireless base station 1B. When the mobile terminal 3A is called from the radio base station 1A and a response is received from the mobile terminal 3A, the storage circuit 9 stores the radio base station 1A in a state where the radio base station 1A can connect to the mobile terminal 3A.
The fact that the portable terminal 3A is located in the wireless zone (micro cell) 2A in which is located is stored. Next, when there is no response after calling the mobile terminal 3A from the wireless base station 1B,
The storage circuit 9 stores that the wireless base station 1B could not connect to the mobile terminal 3A. [0005] Next, the portable terminal 3AB in FIG. 5 includes two radio zones 2A, 2A of the radio base station 1A and the radio base station 1B.
B, and both the wireless base station 1A and the wireless base station 1B are located within a communicable distance of the portable terminal 3AB. In this case, the storage circuit 9 stores that both the wireless base station 1A and the wireless base station 1B have been connected to the portable terminal 3AB. Accordingly, the mobile terminal 3AB can detect that the mobile terminal 3AB is located in one of the wireless zones of the wireless base station 1A and the wireless base station 1B, but cannot determine which one is closer to the wireless base station 1A or the wireless base station 1B. [0006] Generally, in the microcell radio system, the radio zones are overlapped in order to eliminate the dead zone of the radio wave, so that the reception of the portable terminal in the vicinity of the radio zone distant from the radio base station. The input becomes weaker,
When a line connection with a wireless base station becomes impossible, it can be connected to another wireless base station. In the configuration of FIG. 5, the mobile terminal 3AB has moved to an intermediate position between the wireless zones 2A and 2B.
A can be connected from both A and the wireless base station 1B. For this reason, in the conventional configuration, a plurality of wireless base stations may be detected as wireless base stations that can be connected to the mobile terminal.
It was not possible to identify which wireless base station the mobile terminal was closest to. An object of the present invention is to provide a method capable of detecting a position of a portable terminal with high accuracy in a microcell radio system. According to the present invention, a portable terminal is sequentially called via a plurality of radio base stations, and a transmission data signal is compared with a reception data signal received by the radio base station for transmission / reception. By measuring and storing the delay time, the distance from the plurality of connectable wireless base stations and the propagation delay time between the wireless base station and the portable terminal is calculated, and the position of the portable terminal is detected. FIG. 1 shows a system configuration of a reference example, and portions corresponding to FIG. 5 are denoted by the same reference numerals. The radio base stations 1A and 1B respectively include a transmitter 11, a receiver 12,
It comprises a modulator 13, a demodulator 14, a baseband circuit 15, and a propagation delay time measuring circuit 21. A mobile terminal 3 transmits and receives communication data to and from a wireless base station via a wireless line. As an example, the wireless base station 1A to the portable terminal 3
If A is called and a response is received, it is detected that the mobile terminal 3A is located in the wireless zone 2A of the wireless base station 1A. At this time, the propagation delay time measuring circuit 2 of the radio base station 1A
1 compares the transmission data with the reception data transmitted and received from the mobile terminal 3A and compares the mobile terminal 3A with the wireless base station 1
The propagation delay time of A is measured. The storage circuit 22 manages the numbers of the plurality of wireless base stations and the plurality of mobile terminals, and stores the number of the wireless base station connectable to the mobile terminal and the propagation delay time of the mobile terminal during a call. The arithmetic circuit 23 calculates the position of the mobile terminal in consideration of the distance corresponding to the propagation delay time from the position corresponding to the management number of the wireless base station written in the storage circuit 22.
Calculate with. FIG. 2 is an explanatory diagram of a frame configuration in the case of a PHS for measuring a propagation delay time. PHS sends 4
This is a four-channel TDMA-TDD system of time slots TX1 to TX4 and four reception time slots RX1 to RX4, and the TDMA frame length is 5 ms. For communication with one portable terminal, a transmission burst, for example, TX1, and a reception burst RX1 having a transmission / reception delay time of 2.5 ms from the transmission burst TX1 are used. The mobile terminal receives the transmission burst TX1 of the radio base station, detects the timing of the TDMA frame, delays it by 2.5 ms, and transmits it to the radio base station in the RX1 time slot. In the radio base station, the delay time difference between the transmission burst TX1 and the reception burst RX1 is delayed by a round-trip time of 2.5 ms transmission / reception delay time and a propagation delay time between the radio base station and the portable terminal. Therefore, the propagation delay time can be measured by comparing the data of the transmission / reception bursts TX1 and RX1. TX2 to TX4 and RX2 to RX4 are transmission / reception time slots used in another mobile terminal. FIG. 3 shows a frame structure of a PHS communication slot, with a start symbol SS, a preamble PR, a synchronization word (unique word) UW, an information bit I, an error detection, starting from a ramp time R for transient response. It consists of a code CRC. The propagation delay time can be measured by measuring the transmission / reception delay time by detecting the unique word position by comparing and comparing the unique word patterns UW included in the transmission / reception data. [0013] Figure 4 shows the actual施例of the invention, are given the same reference numerals corresponding to those in FIG. Wireless base station 1A
Is composed of a transmitter 31, a receiver 32, an optical-electrical (O / E) converter 41, and an electric-optical (E / O) converter 42, and is connected to the central control station 20 by an optical fiber . The central control station 20 includes a modulator 33, a demodulator 34, a baseband processing circuit 35, a delay measuring device 21 for measuring a propagation delay time,
It comprises an opto-electric (O / E) converter 41 and an electro-optical (E / O) converter 42. Since the delay time measurement can be performed by the central control station, it is noted that a control line for transmitting a delay data signal between the radio base station and the storage circuit 22 is not required.
Considered examples and different. As described above, according to the present invention, a portable terminal is sequentially called and communicated through a plurality of radio base stations, and received data received by the radio base station is compared with transmitted data. Thus, the propagation delay time is measured, the distance from a plurality of connectable wireless base stations is measured, and the position of the portable terminal can be detected with high accuracy.
【図面の簡単な説明】
【図１】参考例が適用されるシステム構成を示すブロッ
ク図。
【図２】ＴＤＭＡフレーム構成を説明する図。
【図３】ＴＤＭＡの１スロットの構成を示す図。
【図４】この発明の実施例が適用されるシステムの構成
を示すブロック図。
【図５】従来の携帯端末位置検出方法が適用されるシス
テムの構成を示すブロック図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a system configuration to which a reference example is applied. FIG. 2 is a diagram illustrating a TDMA frame configuration. FIG. 3 is a diagram showing a configuration of one slot of TDMA. 4 is a block diagram showing the configuration of a system in which real施例of the invention is applied. FIG. 5 is a block diagram showing a configuration of a system to which a conventional mobile terminal position detection method is applied.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−115229（ＪＰ，Ａ) 特開 平５−211469（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 7/24 - 7/26 102 H04Q 7/00 - 7/38 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-115229 (JP, A) JP-A-5-211469 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H04B 7/24-7/26 102 H04Q 7/00-7/38
Claims (1)
の無線ゾーンに分割し、 その各無線ゾーンごとにそれぞれ設けた無線基地局を通
じて、その無線ゾーン内に存在する携帯端末と無線電波
の送受信を行うようにしたマイクロセル移動通信方式に
おいて、 呼出制御部から上記複数の無線基地局を通じて携帯端末
を順次呼出し、応答が受信された無線基地局の無線ゾー
ンにその応答携帯端末が位置していることを検出する方
法であって、 上記呼出制御部の近くに上記各無線基地局に対し送受す
る集中制御部を集中して設け、 各無線基地局を携帯端末の呼出しを上記集中制御部を介
して行い、 上記各集中制御部では上記呼出し信号に対する上記携帯
端末よりの応答信号の遅延時間を測定し、 その測定時間を上記呼出制御部へ通知し、 上記呼出制御部は同一携帯端末からの応答が複数の無線
基地局で受信された場合に、その測定遅延時間の最小の
無線基地局の無線ゾーンにその携帯端末が位置すると判
定することを特徴とするマイクロセル移動通信方式の携
帯端末位置検出方法。(57) [Claims] [Claim 1] A service area is divided into a plurality of wireless zones while partially overlapping with each other, and the service area exists in each wireless zone through a wireless base station provided for each wireless zone. In the micro-cell mobile communication system configured to transmit and receive radio waves to and from the mobile terminal, the mobile terminal sequentially calls the mobile terminal from the call control unit through the plurality of radio base stations and places the call in the radio zone of the radio base station where the response is received. A method for detecting that a response portable terminal is located, wherein a centralized control unit for transmitting and receiving to and from each of the wireless base stations is provided near the paging control unit, and each wireless base station is connected to the portable terminal. A call is made via the centralized control unit. Each of the centralized control units measures a delay time of a response signal from the portable terminal to the call signal, and uses the measured time as the call control time. And when the response from the same portable terminal is received by a plurality of wireless base stations, the call control unit determines that the portable terminal is located in the wireless zone of the wireless base station having the smallest measured delay time. A method for detecting the position of a mobile terminal in a micro-cell mobile communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19454196A JP3379079B2 (en) | 1996-07-24 | 1996-07-24 | Microcell mobile communication system portable terminal position detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19454196A JP3379079B2 (en) | 1996-07-24 | 1996-07-24 | Microcell mobile communication system portable terminal position detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1042343A JPH1042343A (en) | 1998-02-13 |
| JP3379079B2 true JP3379079B2 (en) | 2003-02-17 |
Family
ID=16326256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19454196A Expired - Lifetime JP3379079B2 (en) | 1996-07-24 | 1996-07-24 | Microcell mobile communication system portable terminal position detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3379079B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000244967A (en) * | 1999-02-24 | 2000-09-08 | Mitsubishi Electric Corp | Mobile communication system, mobile unit and base station configuring the system and method for detecting position of the mobile unit in the system |
| JP3413833B2 (en) | 2000-05-18 | 2003-06-09 | 日本電気株式会社 | Access control method and base station device |
| JP2002337689A (en) * | 2001-05-18 | 2002-11-27 | Nec Corp | Traffic guiding method, and traffic guiding system and program |
| US7299063B2 (en) | 2002-07-01 | 2007-11-20 | Sony Corporation | Wireless communication system, wireless communication device and wireless communication method, and computer program |
| CN101390422A (en) * | 2006-02-27 | 2009-03-18 | 日本电气株式会社 | Mobile communication system, base station, and inter-cell interference reduction method |
| CN103358436A (en) * | 2013-08-02 | 2013-10-23 | 昆山科海模具有限公司 | Improved mold ejector pin structure |
-
1996
- 1996-07-24 JP JP19454196A patent/JP3379079B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1042343A (en) | 1998-02-13 |
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