JP3370926B2

JP3370926B2 - Mobile station position estimation method in cellular mobile communication, base station apparatus and mobile station apparatus

Info

Publication number: JP3370926B2
Application number: JP06010498A
Authority: JP
Inventors: 真司上林; 公士大野; 誠蔵尾上
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 1997-03-14
Filing date: 1998-03-11
Publication date: 2003-01-27
Anticipated expiration: 2018-03-11
Also published as: JPH10322752A

Description

Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、移動局と基地局の
間で通信を行うセルラ移動通信において移動局の位置を
推定する移動局位置推定方法および該位置推定方法を実
施する基地局装置と移動局装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station position estimating method for estimating the position of a mobile station in cellular mobile communication in which a mobile station and a base station communicate with each other, and a base station apparatus for carrying out the position estimating method. The present invention relates to a mobile station device.

【０００２】[0002]

【従来の技術】従来のセルラ移動通信システムでは、通
信している移動局の位置を推定することはできなかっ
た。そのため、緊急電話（日本の１１０番、１１９番、
米国の９１１番等）の発信者の位置が特定できない等の
問題が指摘されていた。2. Description of the Related Art In a conventional cellular mobile communication system, the position of a mobile station with which it is communicating cannot be estimated. Therefore, emergency calls (110, 119 in Japan,
It has been pointed out that there is a problem such as the location of the sender (911 in the United States) cannot be specified.

【０００３】無線により位置を推定する技術は、船舶、
航空機の電波航法（ビーコン、ロラン、マイクロ波着陸
装置等）がよく知られている。しかし、これらの技術は
セルラ移動通信には適さない。A technique for wirelessly estimating a position is known as a ship,
Radio navigation of aircraft (beacon, loran, microwave landing gear, etc.) is well known. However, these techniques are not suitable for cellular mobile communications.

【０００４】ビーコンは、移動機に方向探知機能が必要
となり、小型化に適さない。ロラン等の双曲線位置線方
式は、基地局間の同期が必要である。一般にセルラ移動
通信の基地局は互いに同期していないため本方式は適用
できない（米国ＥＬＡ／ＴＩＡ標準のＩＳ−９５方式
は、例外的に基地局間が同期しているためこの種の方式
が適用できる）。マイクロ波着陸装置は、特殊な指向性
のアンテナを用い、特定のエリアの航空機の位置を高い
精度で測定できるが、簡易な無線設備で任意の位置の移
動局を測定することは困難である。The beacon is not suitable for miniaturization because the mobile device requires a direction finding function. The hyperbolic position line method such as Loran requires synchronization between base stations. Generally, the base stations for cellular mobile communication are not synchronized with each other and therefore this method cannot be applied (this type of method is applied to the IS-95 method of the US ELA / TIA standard because the base stations are exceptionally synchronized. it can). The microwave landing gear can measure the position of an aircraft in a specific area with high accuracy by using a special directional antenna, but it is difficult to measure a mobile station at an arbitrary position with simple wireless equipment.

【０００５】最近、衛星を用いた位置測定方式ＧＰＳ
（Global Positioning System ）が普及しているが、こ
れも衛星局間は高精度で同期したシステムであり、上記
ＩＳ−９５方式には応用可能だが、一般のセルラ移動通
信システムは非同期システムであり、本方式は適用でき
ない。Recently, a GPS for position measurement system using satellites
(Global Positioning System) is widespread, but this is also a system in which satellite stations are synchronized with high accuracy and can be applied to the above IS-95 system, but a general cellular mobile communication system is an asynchronous system, This method cannot be applied.

【０００６】[0006]

【発明が解決しようとする課題】上述したように、従来
の無線を用いた位置推定技術は、移動機、基地局の無線
機の小型化が困難であるとともに、または基地局間同期
が必要等のため、一般のセルラ移動通信には適さないと
いう問題があった。As described above, according to the conventional position estimation technique using radio, it is difficult to miniaturize the radio of the mobile unit and the base station, or the synchronization between the base stations is required. Therefore, there is a problem that it is not suitable for general cellular mobile communication.

【０００７】本発明は、上記に鑑みてなされたもので、
その目的とするところは、基地局間が非同期の一般のセ
ルラ移動通信において簡易に移動局の位置を推定するこ
とができるセルラ移動通信における移動局位置推定方法
および基地局装置と移動局装置を提供することにある。The present invention has been made in view of the above,
An object of the present invention is to provide a mobile station position estimation method, a base station device and a mobile station device in cellular mobile communication, which can easily estimate the position of a mobile station in general cellular mobile communication in which base stations are asynchronous. To do.

【０００８】[0008]

【課題を解決するための手段】上記目的を達成するた
め、本発明は、移動局と基地局の間で通信を行うセルラ
移動通信において、（ａ）基地局と移動局の間で、該移
動局に対し固有に予め決められた第１の信号系列と第２
の信号系列をやり取りし、（ｂ）基地局と移動局の内の
一方の局において、前記第１の信号系列と前記第２の信
号系列の位相差を求め、該位相差に基づいて基地局と移
動局の間の推定距離を算出して移動局の位置を推定する
ことを特徴とする移動局位置推定方法を提供する。In order to achieve the above object, the present invention relates to a cellular mobile communication in which a mobile station and a base station communicate with each other. A first signal sequence and a second signal sequence that are uniquely predetermined for the station.
(B) one of the base station and the mobile station calculates the phase difference between the first signal series and the second signal series, and the base station based on the phase difference. There is provided a mobile station position estimation method characterized by calculating an estimated distance between the mobile station and the mobile station to estimate the position of the mobile station.

【０００９】また、本発明では、前記ステップ（ａ）に
おいて、前記一方の局は前記第１の信号系列を基地局と
移動局の内の他方の局に送信し、前記他方の局は受信し
た前記第１の信号系列に同期して前記第２の信号系列を
前記一方の局に送信し、前記ステップ（ｂ）において、
前記一方の局は送信した前記第１の信号系列と受信した
前記第２の信号系列の位相を比較して前記位相差を求め
ることを特徴とする。Further, in the present invention, in the step (a), the one station transmits the first signal sequence to the other station of the base station and the mobile station, and the other station receives it. Transmitting the second signal sequence to the one station in synchronization with the first signal sequence, and in the step (b),
It is characterized in that the one station compares the phases of the transmitted first signal sequence and the received second signal sequence to obtain the phase difference.

【００１０】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記他方
の局は最も遅延時間の短いパスから受信した前記第１の
信号系列に同期して前記第２の信号系列を送信すること
を特徴とする。Further, in the present invention, when a multipath signal is received in the step (a), the other station synchronizes with the first signal sequence received from the path having the shortest delay time. It is characterized in that the second signal sequence is transmitted.

【００１１】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記ステ
ップ（ｂ）において前記一方の局は最も遅延時間の短い
パスから受信した前記第２の信号系列を使用して前記位
相差を求めることを特徴とする。Further, in the present invention, when the multipath signal is received in the step (a), the one station receives the second path received from the path having the shortest delay time in the step (b). It is characterized in that the phase difference is obtained using a signal sequence.

【００１２】また、本発明では、前記ステップ（ａ）に
おいて、前記一方の局は前記第１の信号系列を基地局と
移動局の内の他方の局に送信し、前記他方の局は受信し
た前記第１の信号系列と送信する前記第２の信号系列の
位相を比較して第１の位相差を求め、該第１の位相差の
情報と前記第２の信号系列を前記一方の局に送信し、前
記ステップ（ｂ）において、前記一方の局は送信した前
記第１の信号系列と受信した前記第２の信号系列の位相
を比較して第２の位相差を求め、前記第１の位相差と該
第２の位相差を用いて前記推定距離を算出することを特
徴とする。In the present invention, in the step (a), the one station transmits the first signal sequence to the other station of the base station and the mobile station, and the other station receives the first signal sequence. The first phase difference is obtained by comparing the phases of the first signal series and the second signal series to be transmitted, and the information of the first phase difference and the second signal series are sent to the one station. Transmitting, in the step (b), the one station compares the phases of the transmitted first signal sequence and the received second signal sequence to obtain a second phase difference, It is characterized in that the estimated distance is calculated using the phase difference and the second phase difference.

【００１３】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記他方
の局は最も遅延時間の短いパスから受信した前記第１の
信号系列を使用して前記第１の位相差を求めることを特
徴とする。In the present invention, when the multipath signal is received in the step (a), the other station uses the first signal sequence received from the path having the shortest delay time. It is characterized in that the first phase difference is obtained.

【００１４】また、本発明では、前記ステップ（ａ）に
おいてマルチパスの信号を受信した場合には、前記ステ
ップ（ｂ）において前記一方の局は最も遅延時間の短い
パスから受信した前記第２の信号系列を使用して前記第
２の位相差を求めることを特徴とする。Further, in the present invention, when a multipath signal is received in the step (a), the one station receives the second path received from the path having the shortest delay time in the step (b). It is characterized in that the second phase difference is obtained using a signal sequence.

【００１５】また、本発明では、前記セルラ移動通信は
ＣＤＭＡ方式の移動通信であって、前記第１の信号系列
と前記第２の信号系列はＣＤＭＡ方式の拡散符号である
ことを特徴とする。Further, according to the present invention, the cellular mobile communication is a CDMA mobile communication, and the first signal sequence and the second signal sequence are CDMA spreading codes.

【００１６】また、本発明では、前記セルラ移動通信は
各基地局が全移動局に対して報知する情報を送信する報
知チャネルを有するものであり、前記一方の局は基地局
であって、前記ステップ（ａ）において基地局は前記第
１の信号系列を該報知チャネルで送信することを特徴と
する。In the present invention, the cellular mobile communication has a broadcast channel for transmitting information broadcast by each base station to all mobile stations, and the one station is a base station, In step (a), the base station transmits the first signal sequence on the broadcast channel.

【００１７】また、本発明では、前記ステップ（ａ）に
おいて、移動局は複数の基地局の各々と前記第１の信号
系列と前記第２の信号系列のやり取りを行い、前記ステ
ップ（ｂ）は該複数の基地局に対する移動局の推定距離
を各々算出し、得られた該複数の基地局に対する移動局
の推定距離を総合して移動局の位置を推定することを特
徴とする。Further, in the present invention, in the step (a), the mobile station exchanges the first signal sequence and the second signal sequence with each of a plurality of base stations, and the step (b) is performed. It is characterized in that the estimated distances of the mobile stations to the plurality of base stations are respectively calculated, and the positions of the mobile stations are estimated by integrating the obtained estimated distances of the mobile stations to the plurality of base stations.

【００１８】また、本発明では、前記ステップ（ａ）に
おいて、移動局は前記複数の基地局に対して送信する信
号を符号多重して同時にマルチコード送信することを特
徴とする。Further, in the present invention, in the step (a), the mobile station code-multiplexes signals to be transmitted to the plurality of base stations and simultaneously performs multi-code transmission.

【００１９】また、本発明では、前記ステップ（ａ）に
おいて、移動局は前記複数の基地局に対して送信する信
号をフレーム構成のチャネルに時分割多重して送信する
ことを特徴とする。Further, in the present invention, in the step (a), the mobile station time-division-multiplexes a signal to be transmitted to the plurality of base stations into a frame-structured channel and transmits the signal.

【００２０】また、本発明では、前記一方の局は移動局
であり、前記ステップ（ａ）において、基地局は移動局
が前記第１の信号系列を基地局に送信する前に、移動局
に対して固有に予め決められた第３の信号系列を報知チ
ャネルで送信し、移動局は受信した前記第３の信号系列
に同期して前記第１の信号系列を基地局に送信すること
を特徴とする。Further, in the present invention, the one station is a mobile station, and in the step (a), the base station transmits to the mobile station before the mobile station transmits the first signal sequence to the base station. On the other hand, a third predetermined signal sequence uniquely transmitted is transmitted through a broadcast channel, and the mobile station transmits the first signal sequence to the base station in synchronization with the received third signal sequence. And

【００２１】また、本発明では、前記一方の局は移動局
であり、前記ステップ（ａ）において、基地局は移動局
が前記第１の信号系列を基地局に送信する前に、移動局
に対して固有に予め決められた第３の信号系列を報知チ
ャネルで送信し、移動局は受信した前記第３の信号系列
と送信する前記第１の信号系列の位相を比較して第１の
位相差を求め、該第１の位相差の情報と前記第２の信号
系列を基地局に送信し、基地局は受信した前記第１の信
号系列と送信した前記第３の信号系列の位相を比較して
第２の位相差を求め、前記第１の位相差と該第２の位相
差から基地局と移動局の第１の推定距離を算出し、受信
した前記第１の信号系列と送信する前記第２の信号系列
の位相を比較して第３の位相差を求め、該第３の位相差
の情報と前記第１の推定距離の情報と前記第２の信号系
列を移動局に送信し、前記ステップ（ｂ）において、移
動局は送信した前記第１の信号系列と受信した前記第２
の信号系列の位相を比較して第４の位相差を求め、前記
第３の位相差と前記第４の位相差から基地局と移動局の
第２の推定距離を算出し、前記第１の推定距離と該第２
の推定距離から前記推定距離を算出することを特徴とす
る。Further, in the present invention, the one station is a mobile station, and in the step (a), the base station transmits to the mobile station before the mobile station transmits the first signal sequence to the base station. On the other hand, a third predetermined signal sequence uniquely transmitted is transmitted through a broadcast channel, and the mobile station compares the received third signal sequence with the phase of the first signal sequence to be transmitted to determine the first position. Obtaining a phase difference, transmitting the information of the first phase difference and the second signal sequence to a base station, and the base station compares the phase of the received first signal sequence and the phase of the transmitted third signal sequence. Then, a second phase difference is obtained, a first estimated distance between the base station and the mobile station is calculated from the first phase difference and the second phase difference, and the calculated first distance is transmitted with the received first signal sequence. A third phase difference is obtained by comparing the phases of the second signal series, and the information of the third phase difference and the first phase difference are obtained. Transmits the information and the second signal sequence of the estimated distance to the mobile station, wherein step (b), the mobile station the second received and transmitted by the first signal sequence
Of the signal sequences are compared to obtain a fourth phase difference, a second estimated distance between the base station and the mobile station is calculated from the third phase difference and the fourth phase difference, and the first phase difference is calculated. Estimated distance and the second
The estimated distance is calculated from the estimated distance of 1.

【００２２】また、本発明では、前記ステップ（ｂ）
は、基地局のサービスエリア内で基地局から前記推定距
離離れた位置に対し所定の誤差を考慮して得られる推定
位置エリア内を移動局の位置と推定し、前記ステップ
（ａ）において移動局が複数の基地局の各々と前記第１
の信号系列と前記第２の信号系列のやり取りを行う場合
には、前記ステップ（ｂ）は、該複数の基地局に対する
移動局の推定距離を各々算出し、得られた該複数の基地
局に対する移動局の推定距離から得られる複数の推定位
置エリアが重複するエリア内を移動局の位置と推定する
ことを特徴とする。In the present invention, the step (b)
Estimates the position of the mobile station within the estimated position area obtained by considering a predetermined error with respect to the position away from the base station within the service area of the base station, and in the step (a), the mobile station Each of the plurality of base stations and the first
In the case of exchanging the second signal sequence with the second signal sequence, the step (b) calculates the estimated distances of the mobile stations to the plurality of base stations, and obtains the obtained distances to the plurality of base stations. It is characterized in that the position of the mobile station is estimated in an area where a plurality of estimated position areas obtained from the estimated distance of the mobile station overlap.

【００２３】また、本発明では、前記ステップ（ｂ）
は、基地局の移動局と通信中のセクタ内で基地局から前
記推定距離離れた位置に対し所定の誤差を考慮して得ら
れる推定位置エリア内を移動局の位置と推定し、前記ス
テップ（ａ）において移動局が複数の基地局の各々と前
記第１の信号系列と前記第２の信号系列のやり取りを行
う場合には、前記ステップ（ｂ）は、該複数の基地局に
対する移動局の推定距離を各々算出し、得られた該複数
の基地局に対する移動局の推定距離から得られる複数の
推定位置エリアが重複するエリア内を移動局の位置と推
定することを特徴とする。In the present invention, the step (b)
Estimates the position of the mobile station within an estimated position area obtained by considering a predetermined error with respect to the position distant from the base station by the estimated distance in the sector communicating with the mobile station of the base station, and the step ( When the mobile station exchanges the first signal sequence and the second signal sequence with each of a plurality of base stations in a), the step (b) includes the steps of the mobile station for the plurality of base stations. Each of the estimated distances is calculated, and an area in which a plurality of estimated position areas obtained from the obtained estimated distances of the mobile station to the plurality of base stations overlap is estimated as the position of the mobile station.

【００２４】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局が送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、移動局に対して固有に予め決められた第２の信号系
列を、前記受信手段で受信した前記第１の信号系列に同
期して移動局に送信して、移動局が前記第１の信号系列
と前記第２の信号系列の位相差に基づいて基地局と移動
局の間の推定距離を算出して移動局の位置を推定できる
ようにする送信手段と、を有することを特徴とする基地
局装置を提供する。Further, according to the present invention, a base station device in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, which is predetermined by the mobile station and is unique to the mobile station. Receiving means for receiving the first signal sequence and a second signal sequence predetermined for the mobile station in synchronization with the first signal sequence received by the receiving means. And transmitting so that the mobile station can estimate the position of the mobile station by calculating the estimated distance between the base station and the mobile station based on the phase difference between the first signal sequence and the second signal sequence. A base station apparatus comprising: a transmitting unit.

【００２５】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列に同
期して前記第２の信号系列を送信することを特徴とす
る。Further, in the present invention, when the receiving means receives a multipath signal, the transmitting means synchronizes with the second signal sequence received from the path having the shortest delay time. Is transmitted.

【００２６】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、基地局が送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、移動局に対して固有に予め決められた第２の信号系
列を、前記受信手段で受信した前記第１の信号系列に同
期して基地局に送信して、基地局が前記第１の信号系列
と前記第２の信号系列の位相差に基づいて基地局と移動
局の間の推定距離を算出して移動局の位置を推定できる
ようにする送信手段と、を有することを特徴とする移動
局装置を提供する。Further, according to the present invention, a mobile station device in a mobile station of a cellular mobile communication system for communicating between a mobile station and a base station, which is predetermined by the base station and is unique to the mobile station. Receiving means for receiving the first signal sequence and a second signal sequence predetermined for the mobile station in synchronization with the first signal sequence received by the receiving means to the base station. And transmitting so that the base station can estimate the position of the mobile station by calculating the estimated distance between the base station and the mobile station based on the phase difference between the first signal sequence and the second signal sequence. A mobile station device comprising: a transmitting unit.

【００２７】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列に同
期して前記第２の信号系列を送信することを特徴とす
る。Further, in the present invention, when the receiving means receives a multipath signal, the transmitting means synchronizes with the second signal sequence received from the path having the shortest delay time. Is transmitted.

【００２８】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局に対し固有に予め決められた
第１の信号系列を移動局に送信する送信手段と、移動局
が送信する、移動局に対して固有に予め決められた第２
の信号系列を受信する受信手段と、前記送信手段で送信
した前記第１の信号系列と前記受信手段で受信した前記
第２の信号系列の位相を比較して位相差を求め、該位相
差に基づいて基地局と移動局の間の推定距離を算出して
移動局の位置を推定する位置推定手段と、を有すること
を特徴とする基地局装置を提供する。Further, according to the present invention, there is provided a base station device in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, the first signal sequence being predetermined for the mobile station. To the mobile station, and a second predetermined unit unique to the mobile station, which is transmitted by the mobile station.
And a phase difference between the first signal series transmitted by the transmitting means and the second signal series received by the receiving means to obtain a phase difference. And a position estimation means for estimating the position of the mobile station by calculating an estimated distance between the base station and the mobile station on the basis of the base station device.

【００２９】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記位相差を求めることを特徴とする。Further, in the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to obtain the position. The feature is that the phase difference is obtained.

【００３０】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、移動局に対し固有に予め決められた
第１の信号系列を基地局に送信する送信手段と、基地局
が送信する、移動局に対して固有に予め決められた第２
の信号系列を受信する受信手段と、前記送信手段で送信
した前記第１の信号系列と前記受信手段で受信した前記
第２の信号系列の位相を比較して位相差を求め、該位相
差に基づいて基地局と移動局の間の推定距離を算出して
移動局の位置を推定する位置推定手段と、を有すること
を特徴とする移動局装置を提供する。Further, according to the present invention, there is provided a mobile station device in a mobile station of a cellular mobile communication system for performing communication between a mobile station and a base station, the first signal sequence being predetermined for the mobile station. To the base station, and a second predetermined predetermined for the mobile station, which is transmitted by the base station.
And a phase difference between the first signal series transmitted by the transmitting means and the second signal series received by the receiving means to obtain a phase difference. And a position estimating means for estimating the position of the mobile station by calculating an estimated distance between the base station and the mobile station on the basis of the mobile station device.

【００３１】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記位相差を求めることを特徴とする。Further, in the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to obtain the position. The feature is that the phase difference is obtained.

【００３２】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局に対し固有に予め決められた
第１の信号系列を移動局に送信する送信手段と、移動局
が送信する、移動局に対して固有に予め決められた第２
の信号系列と、移動局において求められた前記第１の信
号系列と第２の信号系列の位相差を示す第１の位相差の
情報を受信する受信手段と、前記送信手段で送信した前
記第１の信号系列と前記受信手段で受信した前記第２の
信号系列の位相を比較して第２の位相差を求め、前記受
信手段で受信した前記第１の位相差と該第２の位相差に
基づいて基地局と移動局の間の推定距離を算出して移動
局の位置を推定する位置推定手段と、を有することを特
徴とする基地局装置を提供する。Further, according to the present invention, there is provided a base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein a first signal sequence predetermined to the mobile station is predetermined. To the mobile station, and a second predetermined unit unique to the mobile station, which is transmitted by the mobile station.
Receiving the information of the first phase difference indicating the phase difference between the first signal series and the second signal series obtained in the mobile station, and the first transmitting the transmitting section. 1 signal sequence and the phase of the second signal sequence received by the receiving means are compared to obtain a second phase difference, and the first phase difference received by the receiving means and the second phase difference. And a position estimation means for estimating the position of the mobile station by calculating an estimated distance between the base station and the mobile station based on the above.

【００３３】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記第２の位相差を求めることを特徴とす
る。Further, in the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to perform the second signal sequence. It is characterized in that a phase difference of 2 is obtained.

【００３４】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、移動局に対し固有に予め決められた
第１の信号系列を基地局に送信する送信手段と、基地局
が送信する、移動局に対して固有に予め決められた第２
の信号系列と、基地局において求められた前記第１の信
号系列と第２の信号系列の位相差を示す第１の位相差の
情報を受信する受信手段と、前記送信手段で送信した前
記第１の信号系列と前記受信手段で受信した前記第２の
信号系列の位相を比較して第２の位相差を求め、前記受
信手段で受信した前記第１の位相差と該第２の位相差に
基づいて基地局と移動局の間の推定距離を算出して移動
局の位置を推定する位置推定手段と、を有することを特
徴とする移動局装置を提供する。Further, according to the present invention, there is provided a mobile station device in a mobile station of a cellular mobile communication system for performing communication between a mobile station and a base station, the first signal sequence being predetermined for the mobile station. To the base station, and a second predetermined predetermined for the mobile station, which is transmitted by the base station.
Receiving the information of the first phase difference indicating the phase difference between the first signal sequence and the second signal sequence obtained in the base station, and the first signal transmitted by the transmitting means. 1 signal sequence and the phase of the second signal sequence received by the receiving means are compared to obtain a second phase difference, and the first phase difference received by the receiving means and the second phase difference. And a position estimating means for estimating the position of the mobile station by calculating an estimated distance between the base station and the mobile station based on the above.

【００３５】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記位置推定手段は最
も遅延時間の短いパスから受信した前記第２の信号系列
を使用して前記第２の位相差を求めることを特徴とす
る。Further, in the present invention, when the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to perform the second signal sequence. It is characterized in that a phase difference of 2 is obtained.

【００３６】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの基地局における基
地局装置であって、移動局が送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、前記受信手段で受信した前記第１の信号系列と移動
局に対して固有に予め決められた第２の信号系列の位相
を比較して第１の位相差を求め、前記第２の信号系列と
該第１の位相差の情報を移動局に送信して、移動局が前
記第１の信号系列と前記第２の信号系列の位相を比較し
て第２の位相差を求め、前記第１の位相差と該第２の位
相差に基づいて基地局と移動局の間の推定距離を算出し
て移動局の位置を推定できるようにする送信手段と、を
有することを特徴とする基地局装置を提供する。Further, according to the present invention, a base station apparatus in a base station of a cellular mobile communication system for communicating between a mobile station and a base station, which is predetermined by the mobile station and is unique to the mobile station. The receiving means for receiving the first signal sequence, the phase of the first signal sequence received by the receiving means, and the second signal sequence predetermined in advance for the mobile station, Of the second signal sequence and the information of the first phase difference are transmitted to the mobile station, and the mobile station compares the phases of the first signal sequence and the second signal sequence. A second phase difference is obtained, and an estimated distance between the base station and the mobile station is calculated based on the first phase difference and the second phase difference so that the position of the mobile station can be estimated. And a base station apparatus.

【００３７】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列を使
用して前記第１の位相差を求めることを特徴とする。Further, in the present invention, when the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path having the shortest delay time to perform the first signal sequence. It is characterized in that the phase difference of is obtained.

【００３８】また、本発明では、移動局と基地局の間で
通信を行うセルラ移動通信システムの移動局における移
動局装置であって、基地局か送信する、移動局に対し固
有に予め決められた第１の信号系列を受信する受信手段
と、前記受信手段で受信した前記第１の信号系列と移動
局に対して固有に予め決められた第２の信号系列の位相
を比較して第１の位相差を求め、前記第２の信号系列と
該第１の位相差の情報を基地局に送信して、基地局が前
記第１の信号系列と前記第２の信号系列の位相を比較し
て第２の位相差を求め、前記第１の位相差と該第２の位
相差に基づいて基地局と移動局の間の推定距離を算出し
て移動局の位置を推定できるようにする送信手段と、を
有することを特徴とする移動局装置を提供する。Further, according to the present invention, a mobile station device in a mobile station of a cellular mobile communication system for communicating between the mobile station and the base station, which is predetermined by the base station and is unique to the mobile station. The receiving means for receiving the first signal sequence, the phase of the first signal sequence received by the receiving means, and the second signal sequence predetermined in advance for the mobile station, Of the second signal sequence and the information of the first phase difference are transmitted to the base station, and the base station compares the phases of the first signal sequence and the second signal sequence. A second phase difference is obtained, and an estimated distance between the base station and the mobile station is calculated based on the first phase difference and the second phase difference so that the position of the mobile station can be estimated. And a mobile station apparatus.

【００３９】また、本発明では、前記受信手段がマルチ
パスの信号を受信した場合には、前記送信手段は最も遅
延時間の短いパスから受信した前記第１の信号系列を使
用して前記第１の位相差を求めることを特徴とする。Further, in the present invention, when the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path having the shortest delay time to perform the first signal sequence. It is characterized in that the phase difference of is obtained.

【００４０】[0040]

【発明の実施の形態】以下、図面を用いて本発明の実施
の形態について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

【００４１】図１は、本発明の第１の実施形態に係る移
動通信における移動局位置推定方法を実施する移動局装
置１００および基地局装置２００の構成を示すブロック
図である。本実施形態は、移動局装置１００が基地局装
置２００からの距離を測定して位置を推定するものであ
る。FIG. 1 is a block diagram showing configurations of a mobile station apparatus 100 and a base station apparatus 200 for implementing a mobile station position estimation method in mobile communication according to the first embodiment of the present invention. In the present embodiment, the mobile station device 100 estimates the position by measuring the distance from the base station device 200.

【００４２】移動局装置１００は、送信信号を生成する
送信信号生成部１０３、第１の固有の信号系列ＰＮ１を
発生するＰＮ１発生部１０１、第２の固有の信号系列Ｐ
Ｎ２を発生するＰＮ２発生部１０２、送信信号生成部１
０３からの送信信号とＰＮ１発生部１０１からの第１の
固有の信号系列ＰＮ１を使った所定のフォーマットの移
動局送信信号を求める送信信号処理部１０４、該送信信
号処理部１０４からの移動局送信信号をアンテナ１１１
を介して基地局に送信する送信部１０５、アンテナ１１
１を介して基地局からの基地局送信信号を受信する受信
部１０６、受信信号の位相を検出する位相検出部１０
７、受信信号と移動局送信信号の位相を比較して位相差
を算出する位相比較部１０８、位相比較部１０８からの
位相差に基づいて移動局装置１００と基地局装置２００
の間の距離を算出する距離算出部１０９、およびこの算
出された距離に基づいて移動局装置１００の位置を推定
する位置推定部１１０から構成されている。Mobile station apparatus 100 has transmission signal generating section 103 for generating a transmission signal, PN1 generating section 101 for generating a first unique signal sequence PN1, and second unique signal sequence P.
PN2 generating section 102 for generating N2, transmission signal generating section 1
A transmission signal processing unit 104 for obtaining a mobile station transmission signal of a predetermined format using the transmission signal from H.03 and the first peculiar signal sequence PN1 from the PN1 generation unit 101, the mobile station transmission from the transmission signal processing unit 104 Signal to antenna 111
The transmitting unit 105 and the antenna 11 for transmitting to the base station via the
1, a reception unit 106 that receives a base station transmission signal from the base station, and a phase detection unit 10 that detects the phase of the reception signal.
7. A phase comparison unit 108 that compares the phases of the received signal and the transmission signal of the mobile station to calculate the phase difference, and the mobile station apparatus 100 and the base station apparatus 200 based on the phase difference from the phase comparison unit 108.
A distance calculation unit 109 that calculates the distance between the two and a position estimation unit 110 that estimates the position of the mobile station device 100 based on the calculated distance.

【００４３】また、基地局装置２００は、アンテナ２１
１を介して移動局からの移動局送信信号を受信する受信
部２０６、該受信部で受信した受信信号の位相を検出す
る位相検出部２０７、第１の固有の信号系列ＰＮ１を発
生するＰＮ１発生部２０１、第２の固有の信号系列ＰＮ
２を発生するＰＮ２発生部２０２、送信信号を生成する
送信信号生成部２０３、基地局の位置情報を生成する基
地局位置情報生成部２０８、送信信号生成部２０３から
の送信信号とＰＮ２発生部２０２からの第２の固有の信
号系列ＰＮ２と基地局位置情報生成部２０８からの位置
情報を使った所定のフォーマットの基地局送信信号を求
める送信信号処理部２０４、移動局からの受信信号に同
期して基地局送信信号を移動局に送信する同期送信部２
０５から構成されている。In addition, the base station device 200 has the antenna 21.
1, a reception unit 206 that receives a mobile station transmission signal from the mobile station via 1, a phase detection unit 207 that detects the phase of the reception signal received by the reception unit, and a PN1 generation that generates a first unique signal sequence PN1. Section 201, second unique signal sequence PN
2, a PN2 generation unit 202 that generates a transmission signal, a transmission signal generation unit 203 that generates a transmission signal, a base station position information generation unit 208 that generates position information of a base station, a transmission signal from the transmission signal generation unit 203, and a PN2 generation unit 202. A transmission signal processing unit 204 for obtaining a base station transmission signal in a predetermined format using the second unique signal sequence PN2 from the base station and the position information from the base station position information generating unit 208, in synchronization with the reception signal from the mobile station. Transmission unit 2 for transmitting a base station transmission signal to a mobile station
It is composed of 05.

【００４４】なお、第１の固有の信号系列ＰＮ１と第２
の固有の信号系列ＰＮ２は各移動局毎に予め決められて
いる信号系列である。The first unique signal sequence PN1 and the second unique signal sequence PN1
The unique signal sequence PN2 is a signal sequence predetermined for each mobile station.

【００４５】以上のように構成される移動局装置および
基地局装置において、移動局の位置を推定するのは、例
えば移動局が緊急電話を発信したとき、移動局のユーザ
が自分の位置を確認したいとき、固定網または別の移動
局のユーザが本移動局の位置を確認したいとき等が考え
られる。移動局が緊急電話を発信したときは、発信の手
順の中で以下の手順により位置推定を行うことができ
る。移動局のユーザが自分の位置を確認したいときは、
ユーザが移動局装置に位置確認要求信号を出す。移動局
装置は、この位置確認要求信号を受信すると以下の手順
を開始する。固定網または別の移動局のユーザが本移動
局の位置を確認したいときは、位置確認要求信号が、本
移動局と通信中の基地局から送信される。本移動局はこ
の位置確認要求信号を受信すると以下の手順を開始す
る。In the mobile station apparatus and the base station apparatus configured as described above, the position of the mobile station is estimated by, for example, when the mobile station makes an emergency call, the user of the mobile station confirms its own position. It is possible that the user of the fixed network or another mobile station wants to confirm the position of the mobile station. When the mobile station makes an emergency call, the position can be estimated by the following procedure in the procedure of making a call. When the mobile station user wants to confirm his / her position,
The user issues a position confirmation request signal to the mobile station device. When the mobile station device receives this position confirmation request signal, the mobile station device starts the following procedure. When the user of the fixed network or another mobile station wants to confirm the position of the mobile station, a position confirmation request signal is transmitted from the base station communicating with the mobile station. Upon receiving this position confirmation request signal, the mobile station starts the following procedure.

【００４６】移動局装置１００は、位置確認の要求を受
け取ると、位置推定のための第１の固有の信号系列ＰＮ
１をＰＮ１発生部１０１で発生する。送信信号処理部１
０４は、必要に応じてその他の送信信号と併せてこの信
号系列ＰＮ１を所定の信号フォーマットに変換する。送
信部１０５はこの信号をアンテナ１１１を介して基地局
装置２００へ送信する。この信号を位置推定基準信号と
呼ぶ。When the mobile station device 100 receives the position confirmation request, the first unique signal sequence PN for position estimation is received.
1 is generated by the PN1 generating unit 101. Transmission signal processing unit 1
04 converts this signal series PN1 into a predetermined signal format together with other transmission signals as necessary. The transmission unit 105 transmits this signal to the base station device 200 via the antenna 111. This signal is called a position estimation reference signal.

【００４７】基地局装置２００の受信部２０６は、移動
局から位置推定基準信号をアンテナ２１１を介して受信
すると、ＰＮ１発生部２０１で信号系列ＰＮ１を発生
し、位相検出部２０７で受信した基準信号のＰＮ１の位
相を検出する。次にＰＮ２発生部２０２で第２の固有の
信号系列ＰＮ２を発生し、送信信号処理部２０４で、基
地局位置情報生成部２０８が発生した位置情報と送信信
号生成部２０３が生成したその他の送信信号と併せてＰ
Ｎ２を所定の信号フォーマットに変換し、同期送信部２
０５で受信したＰＮ１の位相に同期して移動局装置１０
０へ送信する。この信号を位置推定応答信号と呼ぶ。基
地局位置情報は、例えば、基地局の緯度、経度、海抜高
度の情報である。When receiving the position estimation reference signal from the mobile station via the antenna 211, the receiving section 206 of the base station apparatus 200 generates the signal sequence PN1 in the PN1 generating section 201 and receives the reference signal in the phase detecting section 207. The phase of PN1 is detected. Next, the PN2 generation unit 202 generates a second unique signal sequence PN2, and the transmission signal processing unit 204 generates the position information generated by the base station position information generation unit 208 and other transmissions generated by the transmission signal generation unit 203. P along with the signal
N2 is converted into a predetermined signal format, and the synchronous transmitter 2
Mobile station device 10 in synchronization with the phase of PN1 received in 05.
Send to 0. This signal is called a position estimation response signal. The base station position information is, for example, information on latitude, longitude, and altitude above sea level of the base station.

【００４８】移動局装置１００の受信部１０６は、基地
局から位置推定応答信号を受信すると、ＰＮ２発生部１
０２で信号系列ＰＮ２を発生し、位相検出部１０７で受
信した応答信号のＰＮ２の位相を検出する。位相比較部
１０８は、送信部１０５が送信した基準信号のＰＮ１の
位相と、受信した応答信号のＰＮ２の位相を比較し、位
相差を検出する。距離算出部１０９は、この位相差か
ら、基地局装置２００と移動局装置１００の間の距離を
算出する。位置推定部１１０は、距離算出部１０９が算
出した距離と、受信部１０６が受信した基地局装置２０
０の位置情報から移動局の位置を推定する。When receiving the position estimation response signal from the base station, the receiving unit 106 of the mobile station device 100 receives the PN2 generating unit 1
A signal sequence PN2 is generated at 02, and the phase of PN2 of the response signal received by the phase detector 107 is detected. The phase comparison unit 108 compares the phase of PN1 of the reference signal transmitted by the transmission unit 105 with the phase of PN2 of the received response signal to detect a phase difference. The distance calculation unit 109 calculates the distance between the base station device 200 and the mobile station device 100 from this phase difference. The position estimating unit 110 calculates the distance calculated by the distance calculating unit 109 and the base station device 20 received by the receiving unit 106.
The position of the mobile station is estimated from the position information of 0.

【００４９】図２は、図１の実施形態により基地局と移
動局の間の距離を算出する原理を説明するためのタイミ
ングチャートである。同図は、固有の信号系列ＰＮ１，
ＰＮ２の周期が等しい場合の例である。ＰＮ１，ＰＮ２
は伝搬時間を測定するためのマーカ信号であり、位置推
定期間中常時連続送信する必要はない。例えば、フレー
ム同期信号のように周期的に送信する信号をＰＮ１，Ｐ
Ｎ２として使用することができる。移動局装置１００が
送信した位置推定基準信号は上り伝搬路の伝搬時間だけ
遅延して基地局装置２００に受信される。基地局装置２
００は、受信した基準信号に同期して位置推定応答信号
を送信する。移動局装置１００は、この応答信号を、下
り伝搬路の伝搬時間だけ遅延して受信し、送信した基準
信号の位相と受信した応答信号の位相を比較する。ここ
で、測定した位相差を時間に換算してａ［ｓｅｃ］とす
る。ａは往復の伝搬遅延時間である。従って、移動局装
置１００と基地局装置２００の間の距離Ｄは、Ｄ＝ａｃ／２［ｍ］但しｃは光速（約３×１０⁸ｍ／ｓ）、である。FIG. 2 is a timing chart for explaining the principle of calculating the distance between the base station and the mobile station according to the embodiment of FIG. This figure shows a unique signal sequence PN1,
This is an example when the cycle of PN2 is the same. PN1, PN2
Is a marker signal for measuring the propagation time and does not need to be continuously transmitted during the position estimation period. For example, a signal to be transmitted periodically such as a frame synchronization signal is PN1, P
It can be used as N2. The position estimation reference signal transmitted by the mobile station device 100 is delayed by the propagation time of the uplink propagation path and received by the base station device 200. Base station device 2
00 transmits the position estimation response signal in synchronization with the received reference signal. The mobile station device 100 receives this response signal after delaying it by the propagation time of the downlink propagation path, and compares the phase of the transmitted reference signal with the phase of the received response signal. Here, the measured phase difference is converted into time to be a [sec]. a is a round trip propagation delay time. Therefore, the distance D between the mobile station device 100 and the base station device 200 is D = ac / 2 [m], where c is the speed of light (about 3 × 10 ⁸ m / s).

【００５０】図３は、本実施形態により移動局の位置を
推定する方法を説明するための図である。移動局装置１
００は、基地局装置２００から距離Ｄの円弧上に存在す
ると推定できる。実際には、位相差の測定には誤差が含
まれる。例えば、時間に換算した位相差の誤差を考慮し
てａ±α［ｓｅｃ］とすると、距離Ｄは（ａ±α）ｃ＝Ｄ±αｃ＝Ｄ±δ となる。但し、δ＝αｃである。この場合の推定位置
は、図３のハッチング部分になる。FIG. 3 is a diagram for explaining a method for estimating the position of a mobile station according to this embodiment. Mobile station device 1
It can be estimated that 00 exists on the arc of the distance D from the base station apparatus 200. In reality, the measurement of the phase difference includes an error. For example, if a ± α [sec] is considered in consideration of the phase difference error converted into time, the distance D is (a ± α) c = D ± αc = D ± δ. However, δ = αc. The estimated position in this case is the hatched portion in FIG.

【００５１】移動局が複数の基地局との間の距離を測定
すれば、推定位置の精度の向上が期待できる。図４は、
２局の基地局からの距離が測定できたときの例である。
移動局装置１００は、まず基地局装置２００との間で上
記手順により距離を測定する。移動局装置１００と基地
局装置２００の間の距離が誤差を含めてＤ₁±δ
₁［ｍ］とすると、第１の推定エリア（基地局装置２０
０を中心とする円弧状の薄いハッチングエリア）が得ら
れる。次に基地局装置３００との間で同様の手順により
距離を測定する。移動局装置１００と基地局装置３００
の間の測定距離が誤差を含めてＤ₂±δ₂［ｍ］とする
と、第２の推定エリア（基地局装置３００を中心とする
円弧状の薄いハッチングエリア）が得られる。移動局装
置１００の推定位置は、第１の推定エリアと第２の推定
エリアの重なる部分（ダブルハッチングエリア）にな
る。If the mobile station measures the distances between a plurality of base stations, the accuracy of the estimated position can be expected to improve. Figure 4
This is an example when the distance from two base stations can be measured.
The mobile station apparatus 100 first measures the distance with the base station apparatus 200 by the above procedure. The distance between the mobile station device 100 and the base station device 200 includes D ₁ ± δ including an error.
_{If 1} [m], the first estimated area (base station device 20
A thin arc-shaped hatching area centered at 0 is obtained. Next, the distance is measured with the base station device 300 by the same procedure. Mobile station apparatus 100 and base station apparatus 300
If the measurement distance between the _two is D ₂ ± δ ₂ [m] including an error, a second estimated area (a thin arc-shaped hatching area centering on the base station device 300) is obtained. The estimated position of the mobile station device 100 is a portion where the first estimation area and the second estimation area overlap (double hatching area).

【００５２】また、基地局装置２００，３００が複数の
セクタによりセルをカバーしている場合には、図５およ
び図６に示すように、基地局装置２００，３００の通信
中のセクタ内において移動局装置１００の位置推定を行
うことで、推定位置の精度の向上が期待できる。When the base station devices 200 and 300 cover a cell with a plurality of sectors, as shown in FIGS. 5 and 6, the base station devices 200 and 300 move within the communicating sector. By estimating the position of the station device 100, the accuracy of the estimated position can be expected to improve.

【００５３】図７は、本発明の第２の実施形態に係る移
動通信における移動局位置推定方法を実施する移動局装
置１００と基地局装置２００の構成を示すブロック図で
ある。本発明の第２の実施形態は、移動局装置１００の
構成が図１に示したものと同じであり、基地局装置２０
０の構成が図１に示したものに対して位相比較部２０９
が新たに設けられている点と送信部２０５が同期送信を
行うものでない点のみが異なるものであり、同じ構成要
素には同じ符号が付されている。FIG. 7 is a block diagram showing the configurations of mobile station apparatus 100 and base station apparatus 200 that implement the mobile station position estimation method in mobile communication according to the second embodiment of the present invention. In the second embodiment of the present invention, the configuration of the mobile station device 100 is the same as that shown in FIG.
The phase comparison unit 209 has a configuration of 0 as shown in FIG.
Is newly provided and the point that the transmission unit 205 does not perform synchronous transmission, and the same components are denoted by the same reference numerals.

【００５４】本実施形態では、移動局装置１００の最初
の動作は第１の実施形態の場合と同じである。すなわ
ち、移動局装置１００は、位置確認の要求を受け取ると
位置推定のための第１の固有の信号系列ＰＮ１をＰＮ１
発生部１０１で発生する。送信信号処理部１０４は必要
に応じてその他の信号と併せてこの信号系列ＰＮ１を所
定の信号フォーマットに変換する。送信部１０５は、こ
の信号をアンテナ１１１を介して基地局装置２００に送
信する。この信号を位置推定基準信号と呼ぶ。In this embodiment, the first operation of the mobile station device 100 is the same as that in the first embodiment. That is, when the mobile station device 100 receives the position confirmation request, the mobile station device 100 transmits the first unique signal sequence PN1 for position estimation to PN1.
It is generated by the generation unit 101. The transmission signal processing unit 104 converts this signal series PN1 into a predetermined signal format together with other signals as necessary. The transmitting unit 105 transmits this signal to the base station device 200 via the antenna 111. This signal is called a position estimation reference signal.

【００５５】基地局装置２００の受信部２０６は、移動
局から位置推定基準信号を受信すると、ＰＮ１発生部２
０１で信号系列ＰＮ１を発生し、位相検出部２０７で受
信した基準信号のＰＮ１の位相を検出する。次に位相比
較部２０９で、送信する信号にのせる第２の固有の信号
系列ＰＮ２の位相と、検出した基準信号のＰＮ１の位相
を比較し、第１の位相差を求める。送信信号処理部２０
４は、この第１の位相差の情報と信号系列ＰＮ２と、基
地局の位置情報と、その他の送信信号を併せて所定の信
号フォーマットに変換する。送信部２０５は、この信号
をアンテナ２１１を介して移動局装置１００へ送信す
る。この信号を位置推定応答信号と呼ぶ。Upon receiving the position estimation reference signal from the mobile station, the receiving unit 206 of the base station device 200 receives the PN1 generating unit 2
A signal sequence PN1 is generated at 01, and the phase of the reference signal PN1 received by the phase detector 207 is detected. Next, the phase comparison unit 209 compares the phase of the second unique signal sequence PN2 to be placed on the signal to be transmitted with the phase of the detected reference signal PN1 to obtain the first phase difference. Transmission signal processing unit 20
Reference numeral 4 collectively converts the information of the first phase difference, the signal sequence PN2, the position information of the base station, and other transmission signals into a predetermined signal format. The transmission unit 205 transmits this signal to the mobile station device 100 via the antenna 211. This signal is called a position estimation response signal.

【００５６】移動局装置１００の受信部１０６は、基地
局から位置推定応答信号を受信すると、ＰＮ２発生部１
０２で信号系列ＰＮ２を発生し、位相検出部１０７で受
信した応答信号のＰＮ２の位相を検出する。位相比較部
１０８は、送信部１０５が送信した基準信号のＰＮ１の
位相と受信した応答信号のＰＮ２の位相を比較し、第２
の位相差を算出する。距離算出部１０９は、位相比較部
１０８が求めた第２の位相差の情報と受信部１０６が受
信した第１の位相差の情報から基地局と移動局の間の距
離を算出する。位置推定部１１０は、距離算出部１０９
が算出した距離と、受信部１０６が受信した基地局の位
置情報から、移動局装置１００の位置を推定する。Upon receiving the position estimation response signal from the base station, the receiving unit 106 of the mobile station device 100 receives the PN2 generating unit 1
A signal sequence PN2 is generated at 02, and the phase of PN2 of the response signal received by the phase detector 107 is detected. The phase comparing unit 108 compares the phase of PN1 of the reference signal transmitted by the transmitting unit 105 with the phase of PN2 of the response signal received, and outputs the second signal.
Calculate the phase difference of. The distance calculation unit 109 calculates the distance between the base station and the mobile station from the information on the second phase difference obtained by the phase comparison unit 108 and the information on the first phase difference received by the reception unit 106. The position estimation unit 110 uses the distance calculation unit 109.
The position of the mobile station device 100 is estimated from the distance calculated by the above and the position information of the base station received by the receiving unit 106.

【００５７】図８は、図７の実施形態により基地局と移
動局の間の距離を算出する原理を説明するためのタイミ
ングチャートである。移動局装置１００が送信した位置
推定基準信号が、上り伝搬路の伝搬時間だけ遅延して基
地局装置２００に受信されるのは、第１の実施形態の場
合と同じである。しかし、本実施形態では、基地局は受
信した基準信号に同期することなく、独立のタイミング
で位置推定応答信号を送信する。但し、送信する応答信
号と受信した基準信号の位相差（第１の位相差）を測定
し、その情報を応答信号にのせる。移動局は、この応答
信号を下り伝搬路の伝搬時間だけ遅延して受信し、送信
した基準信号の位相と受信した応答信号の位相の位相差
（第２の位相差）を測定する。ここで、第１の位相差と
第２の位相差をそれぞれ時間に換算してａ［ｓｅｃ］，
ｂ［ｓｅｃ］とする。また、固有の信号系列ＰＮ１とＰ
Ｎ２の周期を等しくし、ｇ［ｓｅｃ］とする。このと
き、ｄ（＝（ａ＋ｂ）−ｇ）は、往復の伝搬遅延時間に
なる。従って、移動局と基地局の間の距離Ｄは、Ｄ＝ｃｄ／２［ｍ］となる。移動局と基地局の間の距離がわかれば、移動局
の位置を推定する方法は第１の実施形態と同じである。FIG. 8 is a timing chart for explaining the principle of calculating the distance between the base station and the mobile station according to the embodiment of FIG. The position estimation reference signal transmitted by the mobile station apparatus 100 is received by the base station apparatus 200 after being delayed by the propagation time of the uplink propagation path, as in the case of the first embodiment. However, in this embodiment, the base station transmits the position estimation response signal at an independent timing without synchronizing with the received reference signal. However, the phase difference (first phase difference) between the transmitted response signal and the received reference signal is measured, and the information is placed on the response signal. The mobile station receives the response signal after delaying it by the propagation time of the downlink propagation path, and measures the phase difference (second phase difference) between the phase of the transmitted reference signal and the phase of the received response signal. Here, the first phase difference and the second phase difference are each converted into time, and a [sec],
b [sec]. In addition, unique signal sequences PN1 and P
The period of N2 is made equal and g [sec] is set. At this time, d (= (a + b) -g) is the round trip propagation delay time. Therefore, the distance D between the mobile station and the base station is D = cd / 2 [m]. If the distance between the mobile station and the base station is known, the method of estimating the position of the mobile station is the same as in the first embodiment.

【００５８】本発明の位置推定方法は、無線伝送路の伝
送速度が速いほど、位相差測定の精度が高くなり有効で
ある。ＣＤＭＡの拡散符号は、情報の伝送速度が遅いと
きも速いチップレートを提供するため、本発明の固有の
信号系列としてＣＤＭＡの拡散符号を用いる方法が考え
られる。この場合、図１および図７のそれぞれの移動局
装置、基地局装置の送信信号処理部は、固有の信号系列
であるＣＤＭＡの拡散符号により基地局位置情報または
その他の送信信号（送信信号がない場合はダミー信号）
を拡散する処理を行い、これを位置推定基準信号，位置
推定応答信号として送信部から送信するか、または所定
のフォーマットの位置推定基準信号，位置推定応答信号
の中に固有の信号系列であるＣＤＭＡの拡散符号を含め
て送信部から送信する。The position estimation method of the present invention is effective because the higher the transmission speed of the wireless transmission path, the higher the accuracy of phase difference measurement. Since the CDMA spreading code provides a high chip rate even when the information transmission rate is slow, a method of using the CDMA spreading code as a unique signal sequence of the present invention can be considered. In this case, the transmission signal processing units of the mobile station apparatus and the base station apparatus of FIG. 1 and FIG. 7 respectively use the CDMA spreading code, which is a unique signal sequence, for the base station position information or other transmission signals (there is no transmission signal). In case of dummy signal)
Is transmitted from the transmitter as a position estimation reference signal and a position estimation response signal, or a CDMA which is a unique signal sequence in the position estimation reference signal and the position estimation response signal of a predetermined format. It is transmitted from the transmitter including the spread code of.

【００５９】上記の２つの実施形態では、移動局装置が
距離を測定し位置を推定したが、基地局装置と移動局装
置を読み替えれば基地局が距離を測定し位置を推定する
方法も同様にできることがわかる。但し、このとき複数
の基地局を用いて位置を推定する場合は、基地局間で情
報の送受信を行い、各基地局の測定距離、位置情報を集
めて推定位置を求めなければならない。基地局装置が距
離を測定する方法は、基地局の負担が大きくなるが、無
線区間の信号量を低減できる。すなわち、一般のセルラ
移動通信では、基地局は規制情報、チャネルの構造の情
報等を報知チャネルを使って送信している。この報知チ
ャネルに固有の信号系列をのせれば、位置推定のために
必要な無線信号は移動局が送信する１信号のみとなり効
率的である。ＣＤＭＡ移動通信で固有の信号系列として
拡散符号を使う場合は、これは元々報知チャネルで送信
される情報中に含まれているため、報知チャネルに新た
な情報要素を追加することすら不要である。In the above-mentioned two embodiments, the mobile station device measures the distance and estimates the position. However, if the base station device and the mobile station device are replaced, the base station measures the distance and estimates the position. You can see that However, at this time, when estimating the position using a plurality of base stations, it is necessary to transmit and receive information between the base stations and collect the measured distance and position information of each base station to obtain the estimated position. The method in which the base station device measures the distance increases the load on the base station, but can reduce the signal amount in the wireless section. That is, in general cellular mobile communication, the base station transmits regulation information, channel structure information and the like using the broadcast channel. If a signal sequence specific to this broadcast channel is placed, the wireless signal required for position estimation is efficient because only one signal is transmitted by the mobile station. When a spreading code is used as a unique signal sequence in CDMA mobile communication, since it is originally included in the information transmitted on the broadcast channel, it is not necessary to add a new information element to the broadcast channel.

【００６０】また、位置推定のために往復の信号を用意
する場合も報知チャネルを利用することで推定精度を向
上できる。図９は本発明の第３の実施形態の無線区間の
送受信信号を示す図である。基地局は報知情報に固有の
信号系列ＰＮ３をのせて放送している。この基地局と通
信可能な全ての移動局はこの報知チャネルを受信でき
る。移動局は、受信した報知チャネルの信号系列ＰＮ３
の位相と、送信する位置推定基準信号にのせる固有の信
号系列ＰＮ１の位相の位相差（第１の位相差）ａを測定
し、位置推定基準信号にａとＰＮ１をのせて送信する。
基地局は、受信した基準信号のＰＮ１の位相と送信した
報知情報のＰＮ３の位相の位相差（第２の位相差）ｂお
よび受信した基準信号のＰＮ１の位相と送信する位置推
定応答信号の固有の信号系列ＰＮ２の位相の位相差（第
３の位相差）ｅを測定し、ａとｂから推定距離ｄ₁を算
出する。また、応答信号に、ｅ，ｄ₁，ＰＮ２をのせて
送信する。移動局は、受信した応答信号のＰＮ２の位相
と送信した基準信号のＰＮ１の位相の位相差（第４の位
相差）ｆを測定し、ｅとｆから推定距離ｄ₂を算出す
る。得られたｄ₁とｄ₂を平均して推定距離とする。ｄ
₁とｄ₂の信頼度を求め重み付平均を取る方法もある。
ＰＮ２とＰＮ３の位相に関連がある場合、ｄ₂を求める
ときａ，ｂの情報を使うこともできる。Also, when a round trip signal is prepared for position estimation, the estimation accuracy can be improved by using the broadcast channel. FIG. 9 is a diagram showing transmission / reception signals in a wireless section according to the third embodiment of the present invention. The base station broadcasts by putting a unique signal sequence PN3 on the broadcast information. All mobile stations that can communicate with this base station can receive this broadcast channel. The mobile station receives the signal sequence PN3 of the received broadcast channel.
And the phase difference (first phase difference) a of the phase of the unique signal sequence PN1 placed on the position estimation reference signal to be transmitted are measured, and a and PN1 are placed on the position estimation reference signal and transmitted.
The base station determines the phase difference (second phase difference) b between the phase of PN1 of the received reference signal and the phase of PN3 of the broadcast information transmitted, and the phase of PN1 of the received reference signal and the position estimation response signal to be transmitted. The phase difference (third phase difference) e between the phases of the signal sequence PN2 of ₁ is measured, and the estimated distance d ₁ is calculated from a and b. Also, e, d ₁ and PN2 are added to the response signal and transmitted. The mobile station measures the phase difference (fourth retardation) f of PN1 of the phase of the reference signal transmitted with PN2 phase of the received response signal, and calculates the estimated distance d ₂ from e and f. The obtained d ₁ and d ₂ are averaged to obtain an estimated distance. d
There is also a method of obtaining the reliability of ₁ and d ₂ and taking a weighted average.
If there is a relationship between the phases of PN2 and PN3, the information of a and b can be used when obtaining d ₂ .

【００６１】図１０は、図９の実施形態により基地局と
移動局の間の距離を算出する方法を説明するためのタイ
ミングチャートである。各信号はすでに説明しているの
で、ここでは説明しない。基地局は、時間に換算した位
相差情報ａ，ｂを用い、伝搬遅延時間ｄ₁、移動局−基
地局間距離Ｄ₁を次式により計算する。FIG. 10 is a timing chart for explaining a method of calculating the distance between the base station and the mobile station according to the embodiment of FIG. Each signal has already been described and will not be described here. The base station calculates the propagation delay time d ₁ and the mobile station-base station distance D ₁ by the following equations using the phase difference information a and b converted into time.

【００６２】ｄ₁＝（ａ＋ｂ）−ｇＤ₁＝ｃｄ₁／２移動局は、時間に換算した、位相差情報ｅ，ｆを用い、
伝搬遅延時間ｄ₂、移動局−基地局間距離Ｄ₂を次式に
より計算する。[0062] _{d 1 = (a + b)} -g D 1 = cd 1/2 mobile station in terms of time, using the phase difference information e, f,
The propagation delay time d ₂ and the mobile station-base station distance D ₂ are calculated by the following equations.

【００６３】ｄ₂＝（ｅ＋ｆ）−ｇＤ₂＝ｃｄ₂／２移動局は、Ｄ₁とＤ₂を平均して推定距離Ｄとする。Ｄ＝（Ｄ₁＋Ｄ₂）／２実際には、各無線信号の受信レベルが異なり、またマル
チパスの発生状況等も異なるため、ａ，ｂ，ｅ，ｆは信
頼度が異なる。そこで、Ｄ₁とＤ₂の信頼度を求め、重
み付き平均を求める方法もある。[0063] _{d 2 = (e + f)} -g D 2 = cd 2/2 mobile station, the estimated distance D by averaging the D ₁ and D _2. D = (D ₁ + D ₂ ) / 2 Actually, the reception level of each radio signal is different, and the occurrence status of multipath is also different. Therefore, the reliability of a, b, e, and f is different. Therefore, there is also a method of obtaining the weighted average by obtaining the reliability of D ₁ and D ₂ .

【００６４】本実施形態では、移動局は報知チャネルの
ＰＮ３と送信信号のＰＮ１の位相差を測定したが、第１
の実施形態と同様に、移動局はＰＮ３に同期してＰＮ１
を送信してもよい。その場合の距離算出方法は第１の実
施形態と同じになる。In this embodiment, the mobile station measures the phase difference between PN3 of the broadcast channel and PN1 of the transmission signal.
The mobile station synchronizes with PN3 and PN1.
May be sent. The distance calculation method in that case is the same as that in the first embodiment.

【００６５】複数の基地局を使って位置推定を行う場
合、移動局は、個々の基地局との間でそれぞれ、位置推
定基準信号、位置推定応答信号の送受信が必要であり、
無線区間の信号が増大する。また、距離測定の時刻がず
れるため、位置推定精度が劣化する場合がある。そこ
で、移動局が各基地局へ送信する信号を複数チャネル符
号多重して同時にマルチコード送信とする方法が有効で
ある。また、送信チャネルをスロットに分割し、各基地
局へ送信する信号をフレーム構成のチャネルに時分割多
重して送信する方法もある。When position estimation is performed using a plurality of base stations, the mobile station needs to transmit and receive a position estimation reference signal and a position estimation response signal to and from the individual base stations, respectively.
The signal in the wireless section increases. Further, since the time of distance measurement is shifted, the position estimation accuracy may be deteriorated. Therefore, it is effective to use a method in which signals transmitted from a mobile station to each base station are code-multiplexed in a plurality of channels to simultaneously perform multi-code transmission. There is also a method in which a transmission channel is divided into slots, and a signal to be transmitted to each base station is time-division multiplexed into a channel having a frame structure and then transmitted.

【００６６】実際には、受信信号は複数の伝搬路（マル
チパス）を経た信号が重畳されている。本発明の方法
は、直接波の位相を測定できたときに正確な位置推定が
可能である。マルチパス環境では、最も遅延時間の短い
信号を抽出し、位相を測定することで誤差を小さくでき
る。従って、図１および図７の移動局装置および基地局
装置の位相検出部は、最も遅延時間の短い信号の受信タ
イミング情報を受信部から受け取り位相を検出する。Ｃ
ＤＭＡ移動通信でＲＡＫＥ受信機を使用する場合は、最
も遅延時間の短いフィンガのタイミングを使用する。但
し、位相の確認、信号の判定等はＲＡＫＥ合成後の信号
を用いてもよい。In reality, the received signal is a superposition of signals that have passed through a plurality of propagation paths (multipaths). The method of the present invention enables accurate position estimation when the phase of the direct wave can be measured. In a multipath environment, the error can be reduced by extracting the signal with the shortest delay time and measuring the phase. Therefore, the phase detection units of the mobile station apparatus and the base station apparatus of FIGS. 1 and 7 receive the reception timing information of the signal with the shortest delay time from the reception unit and detect the phase. C
When using a RAKE receiver in DMA mobile communication, the finger timing with the shortest delay time is used. However, the signal after RAKE combining may be used for confirmation of the phase, determination of the signal, and the like.

【００６７】[0067]

【発明の効果】以上説明したように、本発明によれば、
基地局と移動局の一方の局から送信された第１の固有の
信号系列に同期して他方の局は第２の固有の信号系列を
送信し、一方の局は第１および第２の固有の信号系列の
位相差に基づいて基地局と移動局との間の推定距離を算
出して移動局の位置を推定するので、基地局間が同期し
ていないセルラ移動通信においても移動局の位置を簡易
に推定することができる。As described above, according to the present invention,
The other station transmits a second unique signal sequence in synchronization with the first unique signal sequence transmitted from one of the base station and the mobile station, and the other station transmits the first unique signal sequence and the second unique signal sequence. Since the position of the mobile station is estimated by calculating the estimated distance between the base station and the mobile station based on the phase difference of the signal sequence of, the position of the mobile station is also used in the cellular mobile communication where the base stations are not synchronized. Can be estimated easily.

【００６８】また、本発明によれば、基地局と移動局の
一方の局は他方の局へ第１の固有の信号系列を送信し、
他方の局は第１の固有の信号系列と送信する第２の固有
の信号系列の第１の位相差を算出し、この第１の位相差
の情報と第２の固有の信号系列を第１の固有の信号系列
に同期させることなく一方の局に送信し、一方の局は第
１の固有の信号系列と受信した第２の固有の信号系列の
第２の位相差を算出し、第１の位相差と第２の位相差の
情報を用いて基地局と移動局との間の推定距離を算出し
て移動局の位置を推定するので、基地局間が同期してい
ないセルラ移動通信においても移動局の位置を簡易に推
定することができる。Further, according to the present invention, one of the base station and the mobile station transmits the first unique signal sequence to the other station,
The other station calculates a first phase difference between the first unique signal sequence and the second unique signal sequence to be transmitted, and uses this first phase difference information and the second unique signal sequence as the first difference. Of the first unique signal sequence and the second phase difference between the first unique signal sequence and the received second unique signal sequence. Since the position of the mobile station is estimated by calculating the estimated distance between the base station and the mobile station using the information of the phase difference between the base station and the second phase difference, in the cellular mobile communication in which the base stations are not synchronized with each other. Can easily estimate the position of the mobile station.

[Brief description of drawings]

【図１】本発明の第１の実施形態に係る移動通信におけ
る移動局位置推定方法を実施する移動局装置と基地局装
置の構成を示すブロック図。FIG. 1 is a block diagram showing configurations of a mobile station apparatus and a base station apparatus that implement a mobile station position estimation method in mobile communication according to a first embodiment of the present invention.

【図２】図１に示す第１の実施形態において基地局と移
動局の間の距離を算出する原理を説明するためのタイミ
ングチャート。FIG. 2 is a timing chart for explaining the principle of calculating the distance between a base station and a mobile station in the first embodiment shown in FIG.

【図３】図１に示す第１の実施形態において移動局の位
置を推定する方法の一例を説明するための図。FIG. 3 is a diagram for explaining an example of a method for estimating the position of a mobile station in the first embodiment shown in FIG.

【図４】図１に示す第１の実施形態において２局の基地
局からの距離が測定できたときの移動局の位置を推定す
る方法の一例を説明するための図。FIG. 4 is a diagram for explaining an example of a method for estimating the position of a mobile station when the distances of two stations from the base station can be measured in the first embodiment shown in FIG.

【図５】図１に示す第１の実施形態において移動局の位
置を推定する方法の他の例を説明するための図。FIG. 5 is a diagram for explaining another example of the method for estimating the position of a mobile station in the first embodiment shown in FIG.

【図６】図１に示す第１の実施形態において２局の基地
局からの距離が測定できたときの移動局の位置を推定す
る方法の他の例を説明するための図。FIG. 6 is a diagram for explaining another example of the method for estimating the position of the mobile station when the distances of the two stations from the base station can be measured in the first embodiment shown in FIG.

【図７】本発明の第２の実施形態に係る移動通信におけ
る移動局位置推定方法を実施する移動局装置と基地局装
置の構成を示すブロック図。FIG. 7 is a block diagram showing configurations of a mobile station apparatus and a base station apparatus that implement a mobile station position estimation method in mobile communication according to a second embodiment of the present invention.

【図８】図７に示す第２の実施形態において基地局と移
動局装置の間の距離を算出する原理を説明するためのタ
イミングチャート。FIG. 8 is a timing chart for explaining the principle of calculating the distance between the base station and the mobile station device in the second embodiment shown in FIG.

【図９】本発明の第３の実施形態に係る移動通信におけ
る移動局位置推定方法を説明するための無線区間の送受
信信号を示す図。FIG. 9 is a diagram showing transmission / reception signals in a wireless section for explaining a mobile station position estimation method in mobile communication according to a third embodiment of the present invention.

【図１０】図９に示す第３の実施形態において基地局と
移動局の間の距離を算出する原理を説明するためのタイ
ミングチャート。FIG. 10 is a timing chart for explaining the principle of calculating the distance between a base station and a mobile station in the third embodiment shown in FIG.

[Explanation of symbols]

１００移動局装置１０１，２０１ＰＮ１発生部１０２，２０２ＰＮ２発生部１０３，２０３送信信号生成部１０４，２０４送信信号処理部１０５，２０５送信部（同期送信部）１０６，２０６受信部１０７，２０７位相検出部１０８，２０９位相比較部１０９距離算出部１１０位置推定部１１１，２１１アンテナ２００，３００基地局装置２０８基地局位置情報生成部 100 mobile station device 101,201 PN1 generator 102,202 PN2 generator 103, 203 Transmission signal generation unit 104, 204 Transmission signal processing unit 105, 205 transmitter (synchronous transmitter) 106,206 receiver 107, 207 Phase detector 108,209 Phase comparator 109 distance calculator 110 Position estimation unit 111,211 antenna 200,300 Base station equipment 208 Base Station Position Information Generation Unit

───────────────────────────────────────────────────── フロントページの続き (56)参考文献特開平７−181242（ＪＰ，Ａ) 特開平８−86855（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 front page (56) References JP-A-7-181242 (JP, A) JP-A-8-86855 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04B 7/24-7/26 102 H04Q 7/00-7/38

Claims

(57) [Claims]

1. In cellular mobile communication for performing communication between a mobile station and a base station, (a) a first signal sequence predetermined between the base station and the mobile station, which is unique to the mobile station. Exchanging a second signal sequence, (b) in one of the base station and the mobile station, obtain the phase difference between the first signal sequence and the second signal sequence, and based on the phase difference A mobile station position estimation method for estimating the position of a mobile station by calculating an estimated distance between a base station and a mobile station, wherein in the step (a), the one station is the first station.
The signal sequence of is transmitted to the other station of the base station and the mobile station,
The other station obtains a first phase difference by comparing the phases of the received first signal sequence and the second signal sequence to be transmitted, and obtains the information of the first phase difference and the second signal. Transmitting a sequence to the one station, and in the step (b), the one station compares the phases of the transmitted first signal sequence and the received second signal sequence to obtain a second phase difference. Is calculated, and the estimated distance is calculated using the first phase difference and the second phase difference.

2. When a multipath signal is received in step (a), the other station uses the first signal sequence received from the path with the shortest delay time to perform the first signal sequence. The phase difference is obtained.
The described mobile station position estimation method.

3. When the multipath signal is received in the step (a), the one station uses the second signal sequence received from the path having the shortest delay time in the step (b). The mobile station position estimating method according to claim 1, wherein the second phase difference is obtained by performing the following.

4. In cellular mobile communication for performing communication between a mobile station and a base station, (a) a first signal sequence predetermined between the base station and the mobile station, which is unique to the mobile station. Exchanging a second signal sequence, (b) in one of the base station and the mobile station, obtain the phase difference between the first signal sequence and the second signal sequence, and based on the phase difference A mobile station position estimation method for estimating the position of a mobile station by calculating an estimated distance between a base station and a mobile station, wherein the cellular mobile communication transmits information that each base station reports to all mobile stations. Has a broadcast channel to
The mobile station position estimation method, wherein the one station is a base station, and the base station transmits the first signal sequence on the broadcast channel in step (a).

5. In cellular mobile communication in which communication is performed between a mobile station and a base station, (a) a first signal sequence predetermined between the base station and the mobile station, which is unique to the mobile station. Exchanging a second signal sequence, (b) in one of the base station and the mobile station, obtain the phase difference between the first signal sequence and the second signal sequence, and based on the phase difference A mobile station position estimation method for estimating the position of a mobile station by calculating an estimated distance between the base station and the mobile station, wherein in the step (a), the mobile station includes each of a plurality of base stations and the first base station. And the second signal sequence are exchanged, and in step (b), the estimated distances of the mobile stations to the plurality of base stations are calculated, and the obtained estimation of the mobile stations to the plurality of base stations is performed. Estimate the position of the mobile station by integrating the distance, , The mobile station is the mobile station position estimation method, characterized by multi-code transmission at the same time by code multiplexing a signal to be transmitted to the plurality of base stations.

6. In cellular mobile communication for performing communication between a mobile station and a base station, (a) between a base station and a mobile station, and a first signal sequence predetermined in advance for the mobile station. Exchanging a second signal sequence, (b) in one of the base station and the mobile station, obtain the phase difference between the first signal sequence and the second signal sequence, and based on the phase difference A mobile station position estimation method for estimating the position of a mobile station by calculating an estimated distance between the base station and the mobile station, wherein in the step (a), the mobile station includes each of a plurality of base stations and the first base station. And the second signal sequence are exchanged, and in step (b), the estimated distances of the mobile stations to the plurality of base stations are calculated, and the obtained estimation of the mobile stations to the plurality of base stations is performed. Estimate the position of the mobile station by integrating the distance, , The mobile station is the mobile station position estimation method, characterized by transmitting the time division multiplexed signals to be transmitted to the plurality of base stations to the channel of the frame structure.

7. In cellular mobile communication in which communication is performed between a mobile station and a base station, (a) a first signal sequence predetermined between the base station and the mobile station, which is unique to the mobile station. Exchanging a second signal sequence, (b) in one of the base station and the mobile station, obtain the phase difference between the first signal sequence and the second signal sequence, and based on the phase difference A mobile station position estimation method for estimating the position of a mobile station by calculating an estimated distance between the base station and the mobile station, wherein the one station is a mobile station, and in the step (a), the base station is Before the mobile station transmits the first signal sequence to the base station, a third predetermined signal sequence unique to the mobile station is transmitted on the broadcast channel, and the mobile station receives the third signal sequence. A mobile station, characterized in that the first signal sequence is transmitted to a base station in synchronization with the signal sequence. Location estimation method.

8. In cellular mobile communication for performing communication between a mobile station and a base station, (a) between a base station and a mobile station, and a first signal sequence that is predetermined for the mobile station. Exchanging a second signal sequence, (b) in one of the base station and the mobile station, obtain the phase difference between the first signal sequence and the second signal sequence, and based on the phase difference A mobile station position estimation method for estimating the position of a mobile station by calculating an estimated distance between the base station and the mobile station, wherein the one station is a mobile station, and in the step (a), the base station is Before the mobile station transmits the first signal sequence to the base station, a third predetermined signal sequence unique to the mobile station is transmitted on the broadcast channel, and the mobile station receives the third signal sequence. Comparing the phases of the signal sequence and the first signal sequence to be transmitted to obtain a first phase difference, The information on the phase difference of 1 and the second signal sequence are transmitted to the base station, and the base station compares the phases of the received first signal sequence and the transmitted third signal sequence to determine the second position. A phase difference is obtained, a first estimated distance between a base station and a mobile station is calculated from the first phase difference and the second phase difference, and the received first signal sequence and the second signal sequence to be transmitted. And transmitting a third phase difference information, the first estimated distance information, and the second signal sequence to the mobile station, the step (b) In, the mobile station obtains a fourth phase difference by comparing the phases of the first signal sequence transmitted and the second signal sequence received, and from the third phase difference and the fourth phase difference, A second estimated distance between the base station and the mobile station is calculated, and the estimated distance is calculated from the first estimated distance and the second estimated distance. A mobile station position estimation method characterized by the following.

9. The cellular mobile communication is a CDMA mobile communication, and the first signal series and the second signal series are CDMA spreading codes. A mobile station position estimation method according to any one of the above.

10. A base station apparatus in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein a first signal sequence uniquely predetermined for the mobile station is sent to the mobile station. Transmitting means for transmitting, a second signal sequence which is predetermined by the mobile station and which is unique to the mobile station, and the positions of the first signal sequence and the second signal sequence obtained in the mobile station A receiving means for receiving information on a first phase difference indicating a phase difference; and a second means for comparing the phases of the first signal series transmitted by the transmitting means and the second signal series received by the receiving means. A position for estimating the position of the mobile station by calculating the estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference received by the receiving means. An estimator, and a base station device.

11. When the receiving means receives a multipath signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to obtain the second phase difference. The base station apparatus according to claim 10, wherein

12. The cellular mobile communication is a CDMA mobile communication, and the first signal sequence and the second signal sequence are CDMA spreading codes. The base station device according to 1.

13. A mobile station apparatus in a mobile station of a cellular mobile communication system for performing communication between a mobile station and a base station, wherein a first signal sequence uniquely predetermined for the mobile station is sent to the base station. Transmitting means for transmitting, a second signal sequence uniquely predetermined for the mobile station, transmitted by the base station, and the positions of the first signal sequence and the second signal sequence obtained by the base station. A receiving means for receiving information on a first phase difference indicating a phase difference; and a second means for comparing the phases of the first signal series transmitted by the transmitting means and the second signal series received by the receiving means. A position for estimating the position of the mobile station by calculating the estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference received by the receiving means. A mobile station device comprising: an estimating unit.

14. When the receiving means receives a multi-path signal, the position estimating means uses the second signal sequence received from the path having the shortest delay time to obtain the second phase difference. 14. The mobile station device according to claim 13, wherein

15. The cellular mobile communication is CDMA mobile communication, and the first signal sequence and the second signal sequence are CDMA spreading codes. The mobile station device according to 1.

16. A base station device in a base station of a cellular mobile communication system for performing communication between a mobile station and a base station, comprising: The receiving means for receiving a signal sequence and the first signal sequence received by the receiving means are compared with the phase of the second signal sequence predetermined in advance for the mobile station to determine the first phase difference. Then, the information of the second signal sequence and the first phase difference is transmitted to the mobile station, and the mobile station compares the phases of the first signal sequence and the second signal sequence to obtain the second signal sequence. Transmitting means for obtaining a phase difference, calculating an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference, and estimating the position of the mobile station; A base station device having.

17. When the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path having the shortest delay time to perform the first signal sequence.
17. The base station apparatus according to claim 16, wherein the phase difference between the two is calculated.

18. The cellular mobile communication is a CDMA mobile communication, and the first signal sequence and the second signal sequence are spreading codes of a CDMA system. The base station device according to 1.

19. A mobile station apparatus in a mobile station of a cellular mobile communication system for communicating between a mobile station and a base station, the mobile station apparatus transmitting from the base station, which is predetermined for the mobile station. The receiving means for receiving a signal sequence and the first signal sequence received by the receiving means are compared with the phase of the second signal sequence predetermined in advance for the mobile station to determine the first phase difference. Then, the information of the second signal sequence and the first phase difference is transmitted to the base station, and the base station compares the phases of the first signal sequence and the second signal sequence to obtain a second signal sequence. Transmitting means for obtaining a phase difference, calculating an estimated distance between the base station and the mobile station based on the first phase difference and the second phase difference, and estimating the position of the mobile station; A mobile station device characterized by having.

20. When the receiving means receives a multipath signal, the transmitting means uses the first signal sequence received from the path having the shortest delay time to perform the first signal sequence.
20. The mobile station apparatus according to claim 19, wherein the phase difference between the two is calculated.

21. The cellular mobile communication is a CDMA mobile communication, and the first signal sequence and the second signal sequence are CDMA spreading codes. The mobile station device according to 1.