JP2003174662A - Method for locating position of mobile communication terminal, and base station - Google Patents
Method for locating position of mobile communication terminal, and base stationInfo
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- JP2003174662A JP2003174662A JP2001372758A JP2001372758A JP2003174662A JP 2003174662 A JP2003174662 A JP 2003174662A JP 2001372758 A JP2001372758 A JP 2001372758A JP 2001372758 A JP2001372758 A JP 2001372758A JP 2003174662 A JP2003174662 A JP 2003174662A
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- Prior art keywords
- mobile communication
- communication terminal
- base station
- signal
- response signal
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無線通信システム
の移動通信端末の位置標定方法および基地局に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position locating method for a mobile communication terminal of a wireless communication system and a base station.
【０００２】[0002]
【従来の技術】無線通信システムにおける位置標定につ
いては、特開２００１−１０３５４０号公報に開示され
たように、予めＧＰＳ（Ｇｒｏｂａｌ Ｐｏｓｉｔｉｏ
ｎｉｎｇ Ｓｙｓｔｅｍ）等で航法的位置情報（緯度、
経度、標高）のデータが得られている３つの基地局から
位置が移動する移動通信端末に向けて同時に位置標定信
号を送信し、移動通信端末で各位置標定信号の到来時間
の差を測定し、この時間差と基地局の緯度経度情報から
移動通信端末の位置情報を得るものがある。2. Description of the Related Art Regarding position location in a wireless communication system, as disclosed in Japanese Patent Application Laid-Open No. 2001-103540, GPS (Global Position) is previously set.
Ning System) and other navigational information (latitude,
The three base stations for which the data of longitude and altitude) have been obtained simultaneously transmit the position locating signal to the mobile communication terminal whose position is moving, and the mobile communication terminal measures the difference in the arrival time of each position locating signal. There is one that obtains the position information of the mobile communication terminal from this time difference and the latitude and longitude information of the base station.
【０００３】その他、図１０に示されたように、既に位
置情報が確定している２つの基地局１ａおよび１ｂが移
動通信端末４からの電波到来方向をそれぞれ測定し、基
地局１ａおよび１ｂ間の距離と図中の角Ｄおよび角Ｅか
ら、三角測量の原理を用いて移動通信端末の位置を確定
する方法などがある。なお、基地局に方向探知器ではな
く、移動通信端末４からの電波の伝搬遅延時間を測定す
る機能を持たせても伝搬遅延時間から移動通信端末３と
基地局１ａおよび１ｂとの各距離を確定することで、移
動通信端末４と基地局１ａおよび１ｂで形成される三角
形の全ての辺の長さが確定し、移動通信端末３の位置を
確定する方法もある。In addition, as shown in FIG. 10, two base stations 1a and 1b whose position information has already been determined respectively measure the directions of arrival of radio waves from the mobile communication terminal 4, and between the base stations 1a and 1b. There is a method of determining the position of the mobile communication terminal by using the principle of triangulation from the distance and the angles D and E in the figure. Even if the base station has a function of measuring the propagation delay time of the radio wave from the mobile communication terminal 4 instead of the direction finder, the distance between the mobile communication terminal 3 and the base stations 1a and 1b can be calculated from the propagation delay time. There is also a method of determining the position of the mobile communication terminal 3 by determining the lengths of all sides of the triangle formed by the mobile communication terminal 4 and the base stations 1a and 1b.
【０００４】このように従来の方法では、基地局と移動
通信端末からなる三角形の辺または角度を計算するため
に、移動通信端末の通信可能範囲に複数の基地局が必要
であったが、例えば、携帯電話などのシステムでは通信
可能範囲に一つの基地局しかないのが普通であり、一波
の測定のみによっては、移動通信端末の位置を特定する
ことができない。その場合、移動通信端末の位置特定の
ためには、ＧＰＳ装置などの独立航法装置などと組み合
わせたシステムとなるため移動通信端末が高価となり、
ＧＰＳ衛星からの電波を受信しなければならないという
問題点があった。As described above, the conventional method requires a plurality of base stations within the communicable range of the mobile communication terminal in order to calculate the sides or angles of the triangle formed by the base station and the mobile communication terminal. In a system such as a mobile phone, there is usually only one base station in the communication range, and the position of the mobile communication terminal cannot be specified only by measuring one wave. In that case, in order to identify the position of the mobile communication terminal, the system is combined with an independent navigation device such as a GPS device, so that the mobile communication terminal becomes expensive,
There is a problem that radio waves from GPS satellites must be received.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、以上のよう
な問題点を解決するためになされたものであり、移動通
信端末の位置確定に一つの基地局がこの移動通信端末の
電波を測定するのみで移動通信端末の位置を特定する方
法を提供することを目的とする。The present invention has been made to solve the above problems, and one base station measures the radio wave of a mobile communication terminal to determine the position of the mobile communication terminal. It is an object of the present invention to provide a method for specifying the position of a mobile communication terminal only by performing the following.
【０００６】[0006]
【課題を解決するための手段】本発明に係わる移動通信
端末の位置標定方法は、基地局から移動通信端末に向け
て無線送信信号を送信するステップと、前記無線送信信
号を受信した前記移動通信端末が前記基地局に応答信号
を返信するステップと、前記基地局において、前記無線
送信信号の発信時刻と前記応答信号の到達時刻との時間
差から、前記基地局と前記移動通信端末間の距離を測定
するステップと、前記応答信号の到来方向を測定するス
テップとを備えるものである。A method of locating a mobile communication terminal according to the present invention comprises a step of transmitting a radio transmission signal from a base station to the mobile communication terminal, and the mobile communication receiving the radio transmission signal. When the terminal returns a response signal to the base station, and in the base station, the distance between the base station and the mobile communication terminal is calculated from the time difference between the transmission time of the wireless transmission signal and the arrival time of the response signal. It comprises a step of measuring and a step of measuring the arrival direction of the response signal.
【０００７】また、前記基地局は少なくとも２つの無指
向性アンテナを備え、前記各無指向性アンテナに到来す
る前記応答信号の時間差から前記応答信号の到来方向を
測定するものである。Further, the base station is provided with at least two omnidirectional antennas, and measures the arrival direction of the response signal from the time difference between the response signals arriving at the respective omnidirectional antennas.
【０００８】また、前記基地局は複数の指向性アンテナ
を備え、前記各指向性アンテナに到来する前記応答信号
の入感電力を比較して前記応答信号の到来方向を測定す
るものである。Further, the base station is provided with a plurality of directional antennas, and the incoming power of the response signal is measured by comparing the input power of the response signal arriving at each directional antenna.
【０００９】また、前記送信信号は送信データであるも
のである。Further, the transmission signal is transmission data.
【００１０】また、前記応答信号は、前記信号を受信し
てから一定の遅延時間経過後に返信するものである。Further, the response signal is returned after a lapse of a fixed delay time after receiving the signal.
【００１１】また、本発明に係わる基地局は、移動通信
端末に向けて無線送信信号を送信する送信機と、前記移
動通信端末から発せられた前記無線送信信号に対する応
答信号を受信する受信機と、前記送信信号の発信時刻と
前記応答信号の到達時刻との時間差から自己と前記移動
通信端末間の距離を測定する距離測定手段と、前記応答
信号の到来方向を測定する方向探知手段を備えるもので
ある。A base station according to the present invention includes a transmitter for transmitting a radio transmission signal to a mobile communication terminal, and a receiver for receiving a response signal to the radio transmission signal transmitted from the mobile communication terminal. A distance measuring means for measuring a distance between itself and the mobile communication terminal from a time difference between a transmission time of the transmission signal and an arrival time of the response signal, and a direction detecting means for measuring an arrival direction of the response signal Is.
【００１２】[0012]
【発明の実施の形態】実施の形態１．以下、本発明の実
施の形態１について説明する。図１は本発明の実施の形
態１に係わる移動通信システムの構成を表す図である。
図において、基地局１は、移動通信端末４の距離を測定
する距離測定手段と方位を測定するための方位測定機２
ａを備え、また、距離および方位を測定するための位置
標定信号を送信する送受信装置３を備えている。基地局
１は、例えば、ＰＤＣ、ＰＨＳ、ＩＭＴ−２０００等の
携帯電話用の基地局や自動車電話用基地局であって、こ
こで、位置標定信号は専用の信号であっても良いが、実
際に通信されるユーザデータなどであってもよい。ま
た、移動通信端末４は、基地局１からの位置標定信号を
検出し、それに対して応答信号を返信するように送信機
に指示する信号検出回路を備えている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. The first embodiment of the present invention will be described below. FIG. 1 is a diagram showing the configuration of a mobile communication system according to the first embodiment of the present invention.
In the figure, a base station 1 comprises a distance measuring means for measuring a distance of a mobile communication terminal 4 and an azimuth measuring device 2 for measuring an azimuth.
In addition, the transmission / reception device 3 is provided, and the transmission / reception device 3 transmits a position locating signal for measuring the distance and the azimuth. The base station 1 is, for example, a mobile phone base station such as a PDC, PHS, or IMT-2000, or a mobile phone base station. Here, the position location signal may be a dedicated signal. It may be user data or the like communicated to the user. The mobile communication terminal 4 also includes a signal detection circuit that detects the position location signal from the base station 1 and instructs the transmitter to return a response signal to the position location signal.
【００１３】また、図２は基地局１の装置構成例を表す
図である。図において、５は距離測定手段６を含み、基
地局１内の各装置を制御する制御部、７ａ、７ｂ、７
ｃ、７ｄ、７ｅはそれぞれアンテナである。８ａ、８
ｂ、８ｃ、８ｄはそれぞれ受信機、９ａはアンテナ７ａ
とアンテナ７ｂで受信された受信信号の位相を比較する
位相比較器、９ｂはアンテナ７ｃとアンテナ７ｄで受信
された受信信号の位相を比較する位相比較器、１０ａ、
１０ｂはそれぞれＡ／Ｄ換器、１１は位相比較器９ａ、
９ｂの出力から受信信号の到来方向を測定する方位測定
機、１２はアンテナ７ｅと接続され、データ送受信や通
話を行うための処理を行う送受信装置である。FIG. 2 is a diagram showing a device configuration example of the base station 1. In the figure, 5 includes a distance measuring means 6 and a control unit 7a, 7b, 7 for controlling each device in the base station 1.
c, 7d, and 7e are antennas, respectively. 8a, 8
b, 8c and 8d are receivers respectively, and 9a is an antenna 7a.
And a phase comparator for comparing the phases of the reception signals received by the antenna 7b, 9b for comparing the phases of the reception signals received by the antennas 7c and 7d, 10a,
10b is an A / D converter, 11 is a phase comparator 9a,
An azimuth measuring machine for measuring the arrival direction of the received signal from the output of 9b, and 12 is a transmission / reception device that is connected to the antenna 7e and performs processing for data transmission / reception and communication.
【００１４】また、図３は移動通信端末４の装置構成例
を表す図である。図において、７ｆはアンテナ、８ｅは
受信機、１３は受信機８ｅと送信機１４とを切替える送
受信切替器、１５は信号検出手段１６を含んだ制御部で
ある。FIG. 3 is a diagram showing a device configuration example of the mobile communication terminal 4. In the figure, 7f is an antenna, 8e is a receiver, 13 is a transmission / reception switcher for switching between the receiver 8e and the transmitter 14, and 15 is a control unit including a signal detection means 16.
【００１５】次に、本発明の移動体端末の位置標定シス
テムの位置標定方法について説明する。図１のような移
動体通信システムにおいて、移動通信端末４の位置を測
定するために、まず基地局１の送受信装置１２から移動
通信端末４に向けて位置標定信号を送受信装置３から送
信する。その際、距離測定手段６では、位置標定信号の
送信タイミングを記憶しておく。Next, a position locating method of the position locating system for mobile terminals of the present invention will be described. In the mobile communication system as shown in FIG. 1, in order to measure the position of the mobile communication terminal 4, first, the transmitter / receiver 12 of the base station 1 transmits a position location signal to the mobile communication terminal 4 from the transmitter / receiver 3. At that time, the distance measuring means 6 stores the transmission timing of the position location signal.
【００１６】移動通信端末４でこの位置標定信号を受信
すると、信号検出回路１６で受信信号が位置標定信号か
否かを判定し、位置標定信号であると識別した場合は、
直ちに送信機１４に基地局１に対して応答信号を返信す
るよう指示する。移動通信端末４の送信機１４から基地
局１に向けて応答信号が返信されると、基地局１のアン
テナ７ａ、７ｂ、７ｃ、７ｄで受信された受信信号は受
信機８ａ、８ｂ、８ｃ、８ｄで無線周波数から中間周波
数に変換され、受信機８ａおよび８ｂの出力は位相比較
器９ａに入力され、アンテナ７ａおよび７ｂで受信した
受信信号の位相を比較し、その位相差を出力する。When the mobile communication terminal 4 receives the position locating signal, the signal detecting circuit 16 determines whether the received signal is the position locating signal, and when it is identified as the position locating signal,
Immediately, the transmitter 14 is instructed to return a response signal to the base station 1. When a response signal is returned from the transmitter 14 of the mobile communication terminal 4 to the base station 1, the reception signals received by the antennas 7a, 7b, 7c, 7d of the base station 1 are received by the receivers 8a, 8b, 8c, The radio frequency is converted to an intermediate frequency by 8d, the outputs of the receivers 8a and 8b are input to the phase comparator 9a, the phases of the reception signals received by the antennas 7a and 7b are compared, and the phase difference is output.
【００１７】ここで、本発明の実施の形態１における方
位測定方法について説明する。図４は本実施の形態１に
おける方位測定の原理を示す図である。アンテナ７ａお
よび７ｂは無指向性アンテナであって、距離ｄの間隔を
保って設置されている。今、到来電波１７がアンテナ７
ａおよび７ｂを結んだ直線から角度Ａをなす方向からア
ンテナ７ａおよび７ｂに到達したとすると、アンテナ７
ａの方が、アンテナ７ｂよりも距離ｄｓｉｎＡだけ遠い
ため、その分だけ位相のずれが生じる。電波の到来速度
ｃおよび波長λは既知であり、位相差をδとすると到来
時間差τは、τ＝λδ／２πであり、よって、ｄｓｉｎ
Ａ＝ｃ・τから角度Ａが求まり、電波の到来方向を測定
することができる。Now, the azimuth measuring method according to the first embodiment of the present invention will be described. FIG. 4 is a diagram showing the principle of azimuth measurement in the first embodiment. The antennas 7a and 7b are omnidirectional antennas, and are installed at a distance of d. The incoming radio wave 17 is now antenna 7
Suppose that the antennas 7a and 7b are reached from a direction that forms an angle A from a straight line connecting a and 7b.
Since the distance a is farther from the antenna 7b by the distance dsinA, a phase shift correspondingly occurs. The arrival speed c and the wavelength λ of the radio wave are known, and the arrival time difference τ is τ = λδ / 2π, where d is the phase difference.
The angle A can be obtained from A = c · τ, and the arrival direction of the radio wave can be measured.
【００１８】なお、以上では位相差を測定することで電
波到来方向を測定する方法を示したが、当然のことなが
ら、電波の到達時間差を直接求めて電波到来方向を測定
してもよい。Although the method of measuring the arrival direction of the radio wave by measuring the phase difference has been described above, the arrival direction of the radio wave may be measured by directly obtaining the arrival time difference of the radio waves.
【００１９】また、距離の差ｄｓｉｎＡは角度Ａおよび
−Ａで同じ値を持つため、同じ時間差でも２つの方位が
考えられ、無指向性アンテナ２つだけでは方位が不確定
である。そこで、たとえば、９０度異なる位置にもう一
組の無指向性のアンテナ７ｃおよび７ｄを設けること
で、この問題を解決できる。Since the distance difference dsinA has the same value at the angles A and -A, two azimuths are possible even with the same time difference, and the azimuth is uncertain with only two omnidirectional antennas. Therefore, this problem can be solved by providing another pair of omnidirectional antennas 7c and 7d at positions different by 90 degrees, for example.
【００２０】このように位相比較器９ａおよび９ｂで
は、各アンテナに到来した電波の位相が比較され、Ａ／
Ｄ変換器１０ａおよび１０ｂでデジタル信号に変換さ
れ、方位測定機１１に位相差のデジタル信号が入力され
る。方位測定機１１では、既に説明したような方法で位
相差から方位の計算を行い、その結果を出力する。Thus, in the phase comparators 9a and 9b, the phases of the radio waves arriving at the respective antennas are compared, and A / A
The digital signals are converted into digital signals by the D converters 10a and 10b, and the phase difference digital signals are input to the azimuth measuring machine 11. The azimuth measuring machine 11 calculates the azimuth from the phase difference by the method already described and outputs the result.
【００２１】一方、アンテナ７ｅに到来した受信信号の
電波は、送受信装置１２に入力され、この受信信号が位
置標定信号に対する応答信号であった場合は、距離測定
手段６に応答信号の受信タイミングが記憶され、あらか
じめ測定された各装置の動作に伴う遅延時間等が除かれ
て、位置標定信号の送信タイミングとの時間差が計算さ
れる。そして、この時間差と電波の伝搬速度から両者の
距離が測定される。On the other hand, the radio wave of the received signal arriving at the antenna 7e is input to the transmitter / receiver 12, and when the received signal is a response signal to the position locating signal, the distance measuring means 6 receives the response signal. The time difference from the transmission timing of the position locating signal is calculated by removing the delay time and the like that are stored and measured in advance and that accompany the operation of each device. Then, the distance between the two is measured from this time difference and the propagation velocity of the radio wave.
【００２２】上記したように位置標定信号は独立した特
定の信号であってもよいが、例えば、パケット通信を行
う移動体通信システムであれば、通話音声データの含ま
れたパケットのヘッダ部に位置標定信号であることを示
す識別符号を付加し、当該識別符号が付加されたパケッ
トの先頭ビットの送受信時刻から距離測定のための時間
差を測定してもよい。As described above, the position locating signal may be an independent specific signal. For example, in the case of a mobile communication system that performs packet communication, the position locating signal is located in the header portion of the packet containing the call voice data. It is also possible to add an identification code indicating that it is the orientation signal and measure the time difference for distance measurement from the transmission / reception time of the first bit of the packet to which the identification code is added.
【００２３】また、方位測定機２ａと送受信装置３は、
別々のアンテナによって電波を受信する例について説明
したが、方位測定機２の無指向性アンテナを送受信装置
３のアンテナとして共用する構成としてもよい。Further, the azimuth measuring device 2a and the transmitting / receiving device 3 are
The example in which the radio waves are received by the separate antennas has been described, but the omnidirectional antenna of the azimuth measuring device 2 may be shared as the antenna of the transmission / reception device 3.
【００２４】また、位置標定信号を受信した移動通信端
末４は直ちに応答信号を返信する例を示したが、例え
ば、基地局および移動通信端末が一つの周波数を使用す
るような場合に、すぐに移動通信端末が応答すると基地
局の送信中に移動通信端末が送信する場合も考えられ、
基地局は移動通信端末の応答信号を受信できない。この
ような場合には、予め決められた時間応答を行わない固
定遅延を保って移動通信端末が応答信号を返信する。こ
の関係を図５に示す。１９ａは基地局１の送信信号であ
り、１９ｂは基地局１からの位置標定信号に対する応答
信号、２０は基地局１と移動通信端末４との間の距離に
基く伝搬遅延、２１は固定遅延である。図５（ａ）は時
間遅延２１がなく基地局の送信中に移動通信端末からの
応答信号１９ｂが基地局に到達した場合であり、図５
（ｂ）は一定の固定遅延２１を設けて基地局１と移動通
信端末４との信号の衝突を避けた場合の図である。この
ように一定の固定遅延２１の後、位置標定信号に対する
応答信号１９ｂを返信する場合は、距離測定のために測
定した時間差から、この一定の固定遅延２１の分を差し
引いて距離の計算を行う。Although the mobile communication terminal 4 which receives the position location signal immediately returns the response signal has been shown, for example, when the base station and the mobile communication terminal use one frequency, the mobile communication terminal 4 immediately returns the response signal. When the mobile communication terminal responds, it is possible that the mobile communication terminal may transmit while the base station is transmitting,
The base station cannot receive the response signal of the mobile communication terminal. In such a case, the mobile communication terminal returns a response signal with a fixed delay in which no response is made for a predetermined time. This relationship is shown in FIG. Reference numeral 19a is a transmission signal of the base station 1, 19b is a response signal to the position location signal from the base station 1, 20 is a propagation delay based on the distance between the base station 1 and the mobile communication terminal 4, and 21 is a fixed delay. is there. FIG. 5A shows a case where the response signal 19b from the mobile communication terminal reaches the base station during the transmission of the base station without the time delay 21.
(B) is a diagram in the case where a fixed delay 21 is provided to avoid collision of signals between the base station 1 and the mobile communication terminal 4. Thus, when the response signal 19b to the position location signal is returned after the fixed fixed delay 21, the distance is calculated by subtracting the fixed fixed delay 21 from the time difference measured for distance measurement. .
【００２５】以上のように、本発明の実施の形態１で
は、移動通信端末の位置標定方法において、基地局から
移動通信端末に向けて位置標定信号を送信し、位置標定
信号の送信時からこの位置標定信号に対する移動通信端
末の応答信号が基地局に到達するまでの時間を測定する
ことで距離を算出し、また、この応答信号の到来方向を
複数の無指向性アンテナを用いて測定するため、移動通
信端末の位置を１つの基地局のみで測定することがで
き、また、移動通信端末へ付加する回路はほとんど無い
ため安価な位置標定方法を提供する。As described above, according to the first embodiment of the present invention, in the position locating method for the mobile communication terminal, the position locating signal is transmitted from the base station to the mobile communication terminal, and the position locating signal is transmitted from the time of transmitting the position locating signal. To calculate the distance by measuring the time required for the response signal of the mobile communication terminal to reach the base station to the position location signal, and to measure the arrival direction of this response signal using multiple omnidirectional antennas. Since the position of the mobile communication terminal can be measured by only one base station and there is almost no circuit added to the mobile communication terminal, an inexpensive position locating method is provided.
【００２６】実施の形態２．上記の実施の形態１では電
波の到来方向を測定する方法として、無指向性アンテナ
を少なくとも４本用いる方法を示したが、本実施の形態
２では、複数の指向性アンテナの入感電力の組み合わせ
によって電波の到来方向を測定する。なお、それ以外の
送受信装置や距離測定手段などは実施の形態１と同様の
装置を用いる。Embodiment 2. Although a method of using at least four omnidirectional antennas has been shown as a method of measuring the arrival direction of a radio wave in the above-described first embodiment, in the second embodiment, a combination of input power of a plurality of directional antennas is used. To measure the arrival direction of radio waves. Other devices, such as the transmitting / receiving device and the distance measuring means, are the same as those in the first embodiment.
【００２７】図６は本発明の実施の形態２の電波の到来
方向の測定方法の原理を示す図である。図では例えば４
つの指向性アンテナ１８ａ、１８ｂ、１８ｃ、１８ｄを
それぞれ直角方向に配置し、そこに到来電波１７が入射
してきた場合である。アンテナ１８ｂおよび１８ｃは、
それぞれ点ＢおよびＣにおけるアンテナ感度で到来電波
を検知している。FIG. 6 is a diagram showing the principle of the method of measuring the direction of arrival of a radio wave according to the second embodiment of the present invention. In the figure, for example, 4
This is a case where the two directional antennas 18a, 18b, 18c, and 18d are arranged at right angles, and the incoming radio wave 17 is incident on them. The antennas 18b and 18c are
The incoming radio waves are detected by the antenna sensitivities at points B and C, respectively.
【００２８】図７は、横軸を角度、縦軸を入感電力に取
った指向性アンテナ１８ａ、１８ｂ、１８ｃ、１８ｄの
特性を表す図である。図ではアンテナ１８ｂの主ビーム
方向を０度とし、右回りを正方向とした場合の図であ
る。図７の点ＢおよびＣは図６では、同様に点Ｂおよび
Ｃで示した部分に当たり、電波到来方向が変わるに従っ
て各アンテナの入感電力の組み合わせが変化する。その
ためこのように各指向性アンテナ１８ａ、１８ｂ、１８
ｃ、１８ｄの入感電力を測定し、その組み合わせから電
波の到来方向を測定することができる。FIG. 7 is a diagram showing the characteristics of the directional antennas 18a, 18b, 18c, 18d in which the horizontal axis is the angle and the vertical axis is the input power. In the figure, the main beam direction of the antenna 18b is 0 degree, and the clockwise direction is the positive direction. Similarly, points B and C in FIG. 7 correspond to the portions indicated by points B and C in FIG. 6, and the combinations of the input powers of the respective antennas change as the arrival direction of the radio wave changes. Therefore, each directional antenna 18a, 18b, 18
The incoming power of c and 18d can be measured, and the arrival direction of the radio wave can be measured from the combination thereof.
【００２９】図８は、指向性アンテナ１８ａ、１８ｂ、
１８ｃ、１８ｄを用いた場合の方位測定機２ｂの構成を
表すブロック図である。実施の形態１の図２と同じ構成
要素には同じ符号を付す。各指向性アンテナ１８ａ、１
８ｂ、１８ｃ、１８ｄで受信された到来電波は、それぞ
れ受信機８ａ、８ｂ、８ｃ、８ｄで無線周波数から中間
周波数に変換され、Ａ／Ｄ変換されて方位測定機１１ｂ
に入力される。方位測定機１１ｂでは、上記したような
原理から各アンテナの入感電力の組み合わせから角度の
測定を行う。FIG. 8 shows directional antennas 18a, 18b,
It is a block diagram showing the structure of the azimuth measuring machine 2b when using 18c, 18d. The same components as those in FIG. 2 of the first embodiment are designated by the same reference numerals. Each directional antenna 18a, 1
The incoming radio waves received by 8b, 18c, and 18d are converted from radio frequencies to intermediate frequencies by receivers 8a, 8b, 8c, and 8d, respectively, A / D converted, and the azimuth measuring device 11b.
Entered in. The azimuth measuring device 11b measures the angle from the combination of the input powers of the antennas based on the principle described above.
【００３０】なお、方位測定に精度がさほど必要とされ
ない場合は、図９に示したように入感電力が最大の指向
性アンテナの主ビーム方向を電波到来方向として用いて
もよい。図９ではアンテナ１８ｃの入感電力が最大とな
るため、アンテナ１８ｃの主ビーム方向を電波到来方向
として用いる場合についてである。If the azimuth measurement is not required to be highly accurate, the main beam direction of the directional antenna having the maximum entry power may be used as the arrival direction of the radio wave as shown in FIG. In FIG. 9, since the input power of the antenna 18c is maximum, the main beam direction of the antenna 18c is used as the radio wave arrival direction.
【００３１】また、方位測定機２ｂと送受信装置３は、
別々のアンテナによって電波を受信する例について説明
したが、方位測定機２ｂの指向性アンテナを送受信装置
３のアンテナとして共用する構成としてもよい。Further, the azimuth measuring device 2b and the transmitting / receiving device 3 are
Although an example in which radio waves are received by separate antennas has been described, the directional antenna of the azimuth measuring device 2b may be shared as the antenna of the transmitting / receiving device 3.
【００３２】また、上記実施の形態１でも示したよう
に、基地局と移動通信端末とが一つの周波数を用いて通
信を行う場合に、通信の衝突を避けるために一定時間応
答を行わない固定遅延を設けて位置標定信号に対する応
答信号を返信する構成としてもよい。Further, as shown in the first embodiment, when the base station and the mobile communication terminal communicate with each other using one frequency, in order to avoid a collision of the communication, the response is not fixed for a fixed time. A configuration may be employed in which a response signal to the position location signal is returned with a delay.
【００３３】以上のように、本発明の実施の形態１で
は、移動通信端末の位置標定方法において、基地局から
移動通信端末に向けて位置標定信号を送信し、位置標定
信号の送信時からこの位置標定信号に対する移動通信端
末の応答信号が基地局に到達するまでの時間を測定する
ことで距離を算出し、また、この応答信号の到来方向を
複数の指向性アンテナを用いて測定するため、移動通信
端末の位置を１つの基地局のみで測定することができ、
また、移動通信端末へ付加する回路はほとんど無いため
安価な位置標定方法を提供する。As described above, according to the first embodiment of the present invention, in the position locating method for the mobile communication terminal, the position locating signal is transmitted from the base station to the mobile communication terminal, and the position locating signal is transmitted from the time of transmitting the position locating signal. To calculate the distance by measuring the time until the response signal of the mobile communication terminal to the position location signal reaches the base station, and to measure the arrival direction of this response signal using a plurality of directional antennas, The position of the mobile communication terminal can be measured by only one base station,
Further, since there is almost no circuit added to the mobile communication terminal, an inexpensive position locating method is provided.
【００３４】[0034]
【発明の効果】以上のように、本発明に係わる移動通信
端末の位置標定方法は、基地局から移動通信端末に向け
て無線送信信号を送信するステップと、前記無線送信信
号を受信した前記移動通信端末が前記基地局に応答信号
を返信するステップと、前記基地局において、前記無線
送信信号の発信時刻と前記応答信号の到達時刻との時間
差から、前記基地局と前記移動通信端末間の距離を測定
するステップと、前記応答信号の到来方向を測定するス
テップとを備えたため、移動通信端末の位置を１つの基
地局のみで測定することができ、また、移動通信端末へ
付加する回路はほとんど無いため安価である。As described above, the method for locating a mobile communication terminal according to the present invention comprises the steps of transmitting a radio transmission signal from the base station to the mobile communication terminal, and the mobile station receiving the radio transmission signal. A step in which the communication terminal returns a response signal to the base station; and, in the base station, a distance between the base station and the mobile communication terminal from a time difference between a transmission time of the wireless transmission signal and an arrival time of the response signal. And the step of measuring the arrival direction of the response signal, the position of the mobile communication terminal can be measured by only one base station, and most circuits added to the mobile communication terminal are It's cheap because it doesn't exist.
【図１】 本発明の実施の形態１に係わる移動通信シス
テムの構成図である。FIG. 1 is a configuration diagram of a mobile communication system according to a first embodiment of the present invention.
【図２】 本発明の実施の形態１に係わる基地局の装置
構成図である。FIG. 2 is a device configuration diagram of a base station according to the first embodiment of the present invention.
【図３】 本発明の実施の形態１に係わる移動通信端末
の装置構成図である。FIG. 3 is a device configuration diagram of a mobile communication terminal according to the first embodiment of the present invention.
【図４】 本発明の実施の形態１に係わる方位測定の原
理を表す図である。FIG. 4 is a diagram showing a principle of direction measurement according to the first embodiment of the present invention.
【図５】 一定の時間遅延を設けた場合の送受信タイミ
ングを表す図である。
（ａ）一定の時間遅延を設けず、送受信信号が衝突して
しまう場合の図である。
（ｂ）一定の時間遅延を設け、送受信信号の衝突を避け
た場合の図である。FIG. 5 is a diagram showing a transmission / reception timing when a certain time delay is provided. (A) It is a figure in the case where a transmission / reception signal collides without providing a fixed time delay. (B) A diagram in the case where a certain time delay is provided to avoid collision of transmitted and received signals.
【図６】 本発明の実施の形態２に係わる方位測定の原
理を表す図である。FIG. 6 is a diagram showing the principle of azimuth measurement according to the second embodiment of the present invention.
【図７】 本発明の実施の形態２に係わる各指向性アン
テナの特性を表す図である。FIG. 7 is a diagram showing characteristics of each directional antenna according to the second embodiment of the present invention.
【図８】 本発明の実施の形態２に係わる基地局の装置
構成図である。FIG. 8 is a device configuration diagram of a base station according to the second embodiment of the present invention.
【図９】 本発明の実施の形態２に係わる方位測定法の
一例を表す図である。FIG. 9 is a diagram showing an example of an azimuth measuring method according to a second embodiment of the present invention.
【図１０】 従来の位置標定方法を表す図である。FIG. 10 is a diagram showing a conventional position locating method.
１ 基地局、 ２ 方位測定機、３ 送受信装置、
４ 移動通信端末、５ 基地局の制御部、 ６ 距
離測定手段、７ａ、７ｂ、７ｃ、７ｄ、７ｅ 無指向性
アンテナ、８ａ、８ｂ、８ｃ、８ｄ 受信機、 ９
ａ、９ｂ 位相比較器、１０ａ、１０ｂ Ａ／Ｄ変換
器、 １１ａ 方位測定機、１２ 送受信装置、
１３ 送受信切替器、 １４ 送信機、１５ 制御
部、 １６ 信号検出手段、 １７ 到来電波、１
８ａ、１８ｂ、１８ｃ、１８ｄ、１８ｅ 指向性アンテ
ナ、１９ａ 基地局１の送信信号、 １９ｂ 移動通
信端末４の応答信号、２０ 伝搬遅延、 ２１ 固定
遅延。1 base station, 2 azimuth measuring device, 3 transceiver device,
4 Mobile Communication Terminals, 5 Base Station Control Units, 6 Distance Measuring Means, 7a, 7b, 7c, 7d, 7e Omnidirectional Antennas, 8a, 8b, 8c, 8d Receivers, 9
a, 9b Phase comparator, 10a, 10b A / D converter, 11a Direction measuring machine, 12 Transmitting / receiving device,
13 transmitter / receiver switch, 14 transmitter, 15 controller, 16 signal detecting means, 17 incoming radio wave, 1
8a, 18b, 18c, 18d, 18e Directive antenna, 19a Transmission signal of base station 1, 19b Response signal of mobile communication terminal 4, 20 Propagation delay, 21 Fixed delay.
Claims (6)
信信号を送信するステップと、 前記無線送信信号を受信した前記移動通信端末が前記基
地局に応答信号を返信するステップと、 前記基地局において、前記無線送信信号の発信時刻と前
記応答信号の到達時刻との時間差から、前記基地局と前
記移動通信端末間の距離を測定するステップと、 前記応答信号の到来方向を測定するステップとを備える
ことを特徴とする移動通信端末の位置標定方法。1. A step of transmitting a wireless transmission signal from a base station to a mobile communication terminal; a step of causing the mobile communication terminal receiving the wireless transmission signal to return a response signal to the base station; In, the step of measuring the distance between the base station and the mobile communication terminal from the time difference between the transmission time of the wireless transmission signal and the arrival time of the response signal, and the step of measuring the arrival direction of the response signal. A method for locating a position of a mobile communication terminal, comprising:
アンテナを備え、前記各無指向性アンテナに到来する前
記応答信号の時間差から前記応答信号の到来方向を測定
することを特徴とする請求項１記載の移動通信端末の位
置標定方法。2. The base station comprises at least two omnidirectional antennas, and measures the arrival direction of the response signal from the time difference between the response signals arriving at the respective omnidirectional antennas. 1. A method for locating a position of a mobile communication terminal according to 1.
え、前記各指向性アンテナに到来する前記応答信号の入
感電力を比較して前記応答信号の到来方向を測定するこ
とを備えることを特徴とする移動通信端末の位置標定方
法。3. The base station comprises a plurality of directional antennas, and comprises comparing the input power of the response signal arriving at each of the directional antennas to measure the arrival direction of the response signal. A characteristic method for locating a mobile communication terminal.
特徴とする請求項１記載の移動通信端末の位置標定方
法。4. The method for locating a position of a mobile communication terminal according to claim 1, wherein the transmission signal is transmission data.
ら一定の遅延時間経過後に返信することを特徴とする請
求項１記載の移動通信端末の位置標定方法。5. The position locating method for a mobile communication terminal according to claim 1, wherein the response signal is returned after a lapse of a certain delay time after the signal is received.
信する送信機と、 前記移動通信端末から発せられた前記無線送信信号に対
する応答信号を受信する受信機と、 前記送信信号の発信時刻と前記応答信号の到達時刻との
時間差から自己と前記移動通信端末間の距離を測定する
距離測定手段と、 前記応答信号の到来方向を測定する方向探知手段を備え
ることを特徴とする基地局。6. A transmitter for transmitting a radio transmission signal to a mobile communication terminal, a receiver for receiving a response signal to the radio transmission signal emitted from the mobile communication terminal, and a transmission time of the transmission signal. A base station comprising distance measuring means for measuring a distance between itself and the mobile communication terminal based on a time difference between arrival times of the response signals and direction finding means for measuring an arrival direction of the response signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001372758A JP2003174662A (en) | 2001-12-06 | 2001-12-06 | Method for locating position of mobile communication terminal, and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001372758A JP2003174662A (en) | 2001-12-06 | 2001-12-06 | Method for locating position of mobile communication terminal, and base station |
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| Publication Number | Publication Date |
|---|---|
| JP2003174662A true JP2003174662A (en) | 2003-06-20 |
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ID=19181592
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|---|---|---|---|
| JP2001372758A Pending JP2003174662A (en) | 2001-12-06 | 2001-12-06 | Method for locating position of mobile communication terminal, and base station |
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| Country | Link |
|---|---|
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