JP2002281541A - Wireless position calculating device - Google Patents
Wireless position calculating deviceInfo
- Publication number
- JP2002281541A JP2002281541A JP2001077421A JP2001077421A JP2002281541A JP 2002281541 A JP2002281541 A JP 2002281541A JP 2001077421 A JP2001077421 A JP 2001077421A JP 2001077421 A JP2001077421 A JP 2001077421A JP 2002281541 A JP2002281541 A JP 2002281541A
- Authority
- JP
- Japan
- Prior art keywords
- base station
- information
- terminal
- station information
- distance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、無線によって端末
と特定の信号発生源あるいは受信装置間の距離を測定
し、その測距結果から端末の位置を計算する装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring a distance between a terminal and a specific signal source or a receiving apparatus by radio, and calculating the position of the terminal from the distance measurement result.
【０００２】[0002]
【従来の技術】特開平７−１８１２４２には、セルラ方
式で各基地局がＧＰＳ同期したＣＤＭＡ方式を用いてい
るシステムにおいて、各基地局から届くパイロット信号
の受信タイミングを観測することで端末と基地局間の測
距を行い、複数の端末―基地局間の測距結果から端末位
置を計算する方法が開示されている。この従来例では、
基地局の位置情報を、位置計算を行う度に無線端末がサ
ーバ装置に要求して基地局情報を取り込み、その基地局
情報を全て使用して位置計算を行っている。2. Description of the Related Art In a system using a CDMA system in which each base station is GPS-synchronized in a cellular system, Japanese Patent Application Laid-Open No. 7-182242 discloses a terminal and a base station by observing the reception timing of a pilot signal from each base station. A method of performing distance measurement between stations and calculating a terminal position from a result of distance measurement between a plurality of terminals and a base station is disclosed. In this conventional example,
Each time the position information of the base station is calculated, the wireless terminal requests the server device to fetch the base station information, and performs the position calculation using all the base station information.
【０００３】[0003]
【発明が解決しようとする課題】上記従来例では、端末
は位置計算を行う度に基地局の位置情報をサーバ装置に
要求して基地局情報を取り込んでいるため、通信路のト
ラフィックが大きくなると共に、端末の消費電力も大き
くなる。また、基地局情報を全て使用して位置計算を実
施することによっても端末の消費電力が大きくなる。従
って、通信路のトラフィックと端末装置の消費電力の低
減が課題である。In the above-described conventional example, the terminal requests the location information of the base station from the server device and fetches the base station information every time the location is calculated, so that the traffic on the communication path becomes large. At the same time, the power consumption of the terminal increases. In addition, the power consumption of the terminal is increased by performing the position calculation using all the base station information. Therefore, reduction of the traffic on the communication path and the power consumption of the terminal device is an issue.
【０００４】[0004]
【課題を解決するための手段】上記課題は、基地局の情
報を蓄積するサーバ装置と、特定信号を発信する基地局
装置と、基地局装置の信号を受信し、その受信タイミン
グから測距を行う無線端末からなる無線位置計算装置に
おいて、基地局情報を蓄積する基地局情報蓄積手段と、
新たに必要となる基地局を判断する基地局情報選択手段
と、端末が蓄積している基地局情報と測距結果をもと
に、さらに位置計算に使用する基地局の情報を選択する
基地局選択使用手段を具備し、サーバ装置に上記基地局
情報選択手段の選択した基地局情報を要求し、サーバ装
置から端末が必要としている基地局情報を転送すること
を特徴とする無線位置計算装置により解決される。The object of the present invention is to provide a server device for storing information of a base station, a base station device for transmitting a specific signal, a signal for receiving a signal from the base station device, and distance measurement based on the reception timing. In a wireless position calculation device comprising a wireless terminal to perform, base station information storage means for storing base station information,
Base station information selecting means for determining a newly required base station, and a base station for further selecting base station information to be used for position calculation based on the base station information and ranging results accumulated by the terminal. A wireless position calculating device comprising a selecting and using means, requesting the base station information selected by the base station information selecting means from the server device, and transferring the base station information required by the terminal from the server device. Will be resolved.
【０００５】上記解決手段によれば、端末はサーバ装置
に対して必要以上に基地局情報の要求を行わないことか
ら、通信路のトラフィックと端末の消費電力が低減さ
れ、さらに基地局情報を全て使わずに一部だけ使用して
位置計算を行うことによって、蓄積されている基地局情
報へのアクセスが減少することから端末の消費電力は低
減される。[0005] According to the above solution, the terminal does not request the server device for base station information more than necessary, so that the traffic on the communication path and the power consumption of the terminal are reduced. By performing the position calculation using only a part of the terminal without using it, access to the stored base station information is reduced, so that the power consumption of the terminal is reduced.
【０００６】また、上記本発明の無線位置計算装置は、
測距結果と基地局の位置情報から端末の位置を計算する
位置計算手段と、位置計算手段によって算出された端末
の位置と上記基地局情報蓄積手段に蓄積されている基地
局の位置情報から端末−各基地局間の距離を計算する距
離算出手段を具備し、上記基地局情報選択手段は、端末
−基地局間の距離が最も短い基地局の識別情報から新た
に必要となる基地局を判断する基地局情報選択手段であ
ることを特徴とする構成であってもよい。[0006] The wireless position calculating apparatus of the present invention includes:
Position calculating means for calculating the position of the terminal from the distance measurement result and the position information of the base station; and a terminal based on the position of the terminal calculated by the position calculating means and the position information of the base station stored in the base station information storing means. A distance calculating means for calculating a distance between the base stations, wherein the base station information selecting means determines a new required base station from the identification information of the base station having the shortest distance between the terminal and the base station; It may be a configuration characterized in that it is a base station information selecting means.
【０００７】また、上記本発明の無線位置計算装置は、
端末がサーバ装置に基地局情報を要求するときに、端末
が蓄積している基地局情報をサーバ装置に通知する蓄積
情報通知手段と、端末が蓄積していない基地局情報をサ
ーバ装置が選択的に転送する選択転送手段を具備するこ
とを特徴とする構成であってもよい。[0007] Further, the wireless position calculating apparatus of the present invention includes:
When the terminal requests the base station information from the server device, the storage device notification means for notifying the server device of the base station information stored by the terminal, and the server device selectively selects the base station information not stored by the terminal. A configuration may be provided that includes a selective transfer unit that transfers the data to a computer.
【０００８】また、上記本発明の無線位置計算装置は、
端末が蓄積している基地局情報と測距結果をもとに、さ
らに位置計算に使用する基地局の情報を選択する基地局
選択使用手段を具備することを特徴とする構成であって
もよい。[0008] The wireless position calculating apparatus of the present invention includes:
Based on the base station information accumulated by the terminal and the distance measurement result, the terminal may further comprise a base station selecting and using means for selecting information of the base station to be used for position calculation. .
【０００９】また、上記本発明の無線位置計算装置は、
上記基地局選択使用手段は遅延プロファイルの解析によ
り得られる各基地局−端末間の信号の信号対雑音電力比
（ＳＮＲ）が大きい順に複数の基地局を選択することを
特徴とする構成であってもよい。[0009] Further, the wireless position calculating apparatus of the present invention includes:
The base station selecting and using means selects a plurality of base stations in descending order of signal-to-noise ratio (SNR) of a signal between each base station and a terminal obtained by analyzing a delay profile. Is also good.
【００１０】また、上記本発明の無線位置計算装置は、
上記基地局選択使用手段は位置計算結果と基地局情報か
ら得られる各基地局−端末間の距離が短い順に複数の基
地局を選択することを特徴とする構成であってもよい。[0010] Further, the wireless position calculating apparatus of the present invention includes:
The base station selection and use means may be configured to select a plurality of base stations in ascending order of the distance between each base station and the terminal obtained from the position calculation result and the base station information.
【００１１】また、上記本発明の無線位置計算装置は、
上記基地局選択使用手段は各基地局−端末間の距離と測
距結果（擬似距離）の差である測距誤差が小さい順に複
数の基地局を選択することを特徴とする構成であっても
よい。[0011] Further, the wireless position calculating apparatus of the present invention includes:
The base station selection and use means may select a plurality of base stations in ascending order of a ranging error, which is a difference between a distance between each base station and a terminal and a ranging result (pseudorange). Good.
【００１２】[0012]
【発明の実施の形態】図１は本発明の第１の実施例とし
ての端末機２００の装置構成を示す。本装置２００は、
複数の基地局装置２１，２２，２３から送信される信号
をアンテナ１で受信した信号から遅延プロファイルを作
成する遅延プロファイル作成手段２と、遅延プロファイ
ル解析から端末−各基地局間を伝搬した受信信号の信号
対雑音電力比（ＳＮＲ）を計算するＳＮＲ算出手段３
と、遅延プロファイル解析から端末−各基地局間の距離
を測定する測距手段４と、サーバ１０から供給される基
地局情報を持った信号を処理する基地局情報処理手段５
と、位置計算に用いるために基地局情報を蓄積しておく
基地局情報蓄積手段６と、蓄積されている基地局の位置
情報と端末の位置計算結果から擬似距離を計算する擬似
距離算出手段７と、測距結果と基地局情報から端末の位
置を計算する端末位置算出手段８と、ＳＮＲが最大また
は擬似距離が最短の基地局を監視して、ＳＮＲが最大ま
たは擬似距離が最短の基地局に変化があった場合に基地
局情報の蓄積を参照し、更新が必要な基地局情報をサー
バ装置１０に要求する基地局情報選択手段９により構成
される。また、この端末機２００とは別に、周辺の基地
局情報を保有し、端末２００からの要求により必要な基
地局情報を端末に提供するサーバ装置１０が用意されて
いる。FIG. 1 shows the configuration of a terminal 200 as a first embodiment of the present invention. The present device 200
Delay profile creation means 2 for creating a delay profile from signals received from a plurality of base station apparatuses 21, 22, 23 using signals received by antenna 1, and a received signal propagated between a terminal and each base station based on delay profile analysis Calculating means 3 for calculating the signal-to-noise power ratio (SNR) of
Distance measuring means 4 for measuring a distance between a terminal and each base station from delay profile analysis; and base station information processing means 5 for processing a signal having base station information supplied from server 10.
Base station information storing means 6 for storing base station information for use in position calculation, and pseudo distance calculating means 7 for calculating a pseudo distance from the stored base station position information and terminal position calculation results. A terminal position calculating means 8 for calculating the position of the terminal from the ranging result and the base station information; The base station information selecting means 9 requests the server device 10 for base station information that needs to be updated by referring to the accumulation of base station information when there is a change in the base station information. In addition to the terminal 200, a server device 10 is provided which holds peripheral base station information and provides necessary base station information to the terminal in response to a request from the terminal 200.
【００１３】遅延プロファイル作成手段２は、既知の相
関信号を用いたスライディング相関器などに基地局から
送信される信号を通すことによって実現される。詳細は
前記従来例に示されているため、ここでは説明を省略す
る。The delay profile creation means 2 is realized by passing a signal transmitted from a base station through a sliding correlator using a known correlation signal. Since the details are shown in the above-mentioned conventional example, the description is omitted here.
【００１４】基地局情報蓄積手段６は、各基地局の緯
距、経距、基地局ＩＤ、送信タイミング補償情報など、
位置計算に必要な情報をＲＡＭなどの記憶装置に記録す
る。The base station information accumulating means 6 stores information such as latitude and distance, base distance, base station ID, and transmission timing compensation information of each base station.
Information necessary for position calculation is recorded in a storage device such as a RAM.
【００１５】擬似距離算出手段７は、前回の位置計算結
果または位置計算の初期値と、基地局情報蓄積手段６に
蓄積されている各基地局間の距離を算出する。The pseudo distance calculating means 7 calculates the result of the previous position calculation or the initial value of the position calculation and the distance between the base stations stored in the base station information storing means 6.
【００１６】端末位置算出手段８は、位置計算に使用す
る基地局を選択する基地局選択使用手段を具備し、基地
局をＳＮＲの大きい順、または擬似距離の小さい順、ま
たは測距誤差の小さい順に位置計算に使用する基地局を
選択する機能を持つ。The terminal position calculating means 8 comprises a base station selecting and using means for selecting a base station to be used for position calculation. The terminal positions are calculated in the order of the SNR, the order of the pseudorange, or the range of the pseudorange. It has a function of selecting base stations to be used for position calculation in order.
【００１７】基地局情報選択手段９は、ＳＮＲが最大ま
たは擬似距離が最短の基地局に変化が生じたとき、まず
端末が蓄積している基地局情報を参照し、サーバが新た
に提供できる基地局情報と照らし合わせて、必要なもの
だけをサーバ装置に要求する。When a change occurs in the base station having the largest SNR or the shortest pseudo distance, the base station information selecting means 9 first refers to the base station information accumulated by the terminal, and the base station information which can be newly provided by the server. Only the necessary information is requested from the server device in comparison with the station information.
【００１８】図２は本発明の第２の実施例としての端末
機２００の装置構成を示す。本装置は、複数の基地局装
置２１，２２，２３から送信される信号を端末２００の
アンテナ１で受信した信号から遅延プロファイルを作成
する遅延プロファイル作成手段２と、遅延プロファイル
解析から端末−各基地局間を伝搬した受信信号のＳＮＲ
を計算するＳＮＲ算出手段３と、遅延プロファイル解析
から端末−各基地局間の距離を測定する測距手段４と、
サーバから供給される基地局情報を持った信号を処理す
る基地局情報処理手段５と、位置計算に用いるために基
地局情報を蓄積しておく基地局情報蓄積手段６と、蓄積
されている基地局の位置情報と端末の位置計算結果から
擬似距離を計算する擬似距離算出手段７と、測距結果と
基地局情報から端末の位置を計算する端末位置算出手段
８と、ＳＮＲが最大または擬似距離が最短の基地局を監
視して、ＳＮＲが最大または擬似距離が最短の基地局に
変化があった場合に基地局情報の蓄積をサーバ装置１０
に通知する蓄積情報通知手段１１と、周辺の基地局情報
を保有するサーバ装置１０と、端末２００から送信され
た基地局の蓄積情報とサーバ装置１０が持つ基地局情報
を照らし合わせて、端末が必要とする基地局情報だけを
サーバ装置１０から端末２００に転送する選択転送手段
１２により構成される。FIG. 2 shows a device configuration of a terminal 200 as a second embodiment of the present invention. This apparatus includes a delay profile creation unit 2 for creating a delay profile from a signal transmitted from a plurality of base station apparatuses 21, 22, and 23 by a signal received by antenna 1 of terminal 200, and a terminal-each base station based on delay profile analysis. SNR of received signal propagated between stations
SNR calculating means 3 for calculating the distance, and distance measuring means 4 for measuring the distance between the terminal and each base station from the delay profile analysis,
A base station information processing unit 5 for processing a signal having base station information supplied from a server; a base station information storage unit 6 for storing base station information for use in position calculation; Pseudo distance calculating means 7 for calculating the pseudo distance from the position information of the station and the position calculation result of the terminal; terminal position calculating means 8 for calculating the position of the terminal from the distance measurement result and the base station information; Monitors the shortest base station, and stores the base station information when the SNR is the largest or the pseudo distance is the shortest.
, The server device 10 holding the peripheral base station information, and comparing the stored information of the base station transmitted from the terminal 200 with the base station information held by the server device 10, It comprises a selective transfer unit 12 for transferring only necessary base station information from the server device 10 to the terminal 200.
【００１９】本発明によれば、上記実施例のように、基
地局情報を常にサーバ装置に要求するのではなく、必要
に応じて選択的にやりとりすることで、通信路のトラフ
ィックと端末の消費電力を軽減できる。また、位置計算
を実施する際に使用する基地局数を減らすことで基地局
情報蓄積手段へのアクセスが減少することから端末の消
費電力を軽減することができる。According to the present invention, as in the above embodiment, base station information is not always requested from the server device, but is selectively exchanged as needed, so that traffic on the communication path and terminal consumption are reduced. Power can be reduced. Also, by reducing the number of base stations used when performing the position calculation, access to the base station information storage means is reduced, so that power consumption of the terminal can be reduced.
【００２０】[0020]
【発明の効果】本発明によれば、端末はサーバ装置に対
して必要以上に基地局情報の要求を行わないことから、
通信路のトラフィックと端末の消費電力が低減され、さ
らに基地局情報を全て使わずに一部だけ使用して位置計
算を行うことによって、蓄積されている基地局情報への
アクセスが減少することから、端末の消費電力を低減す
ることができる。According to the present invention, since the terminal does not request the base station information more than necessary to the server device,
The traffic on the communication channel and the power consumption of the terminal are reduced, and the access to the stored base station information is reduced by performing location calculation using only part of the base station information instead of using all of the base station information. Therefore, the power consumption of the terminal can be reduced.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の第１の実施例の無線位置計算装置を示
すブロック図。FIG. 1 is a block diagram showing a wireless position calculating apparatus according to a first embodiment of the present invention.
【図２】本発明の第２の実施例の無線位置計算装置を示
すブロック図。FIG. 2 is a block diagram showing a wireless position calculating apparatus according to a second embodiment of the present invention.
１…アンテナ、２…遅延プロファイル作成手段、３…Ｓ
ＮＲ算出手段、４…測距手段、５…基地局情報処理手
段、６…基地局情報蓄積手段、７…擬似距離算出手段、
８…端末位置算出手段、９…基地局情報選択手段、１０
…サーバ装置、１１…蓄積情報通知手段、１２…選択転
送手段、２１，２２，２３…基地局装置。DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Delay profile creation means, 3 ... S
NR calculating means, 4 ... distance measuring means, 5 ... base station information processing means, 6 ... base station information storing means, 7 ... pseudo distance calculating means,
8 ... terminal position calculating means, 9 ... base station information selecting means, 10
... server device, 11 ... storage information notification means, 12 ... selection transfer means, 21, 22, 23 ... base station device.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5J062 AA08 AA09 BB05 CC11 CC18 5K067 AA12 AA43 BB02 BB21 DD19 DD20 EE02 EE10 EE16 EE24 FF03 GG01 GG11 HH22 HH23 JJ52 JJ54 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5J062 AA08 AA09 BB05 CC11 CC18 5K067 AA12 AA43 BB02 BB21 DD19 DD20 EE02 EE10 EE16 EE24 FF03 GG01 GG11 HH22 HH23 JJ52 JJ54
Claims (7)
定信号を発信する基地局装置と、基地局装置の信号を受
信し、その受信タイミングから測距を行う無線端末から
なる無線位置計算装置において、上記無線端末は、基地
局情報を蓄積する基地局情報蓄積手段と、蓄積された基
地局情報と最も受信信号強度が大きい基地局の識別情報
から新たに必要となる基地局を判断する基地局情報選択
手段を具備し、上記基地局情報選択手段の選択した基地
局の情報を上記サーバ装置に要求し、サーバ装置から必
要な基地局情報が転送されることを特徴とする無線位置
計算装置。1. A wireless position calculator comprising: a server device for storing information of a base station; a base station device for transmitting a specific signal; and a wireless terminal for receiving a signal from the base station device and performing distance measurement from the reception timing. In the apparatus, the wireless terminal determines a new required base station based on base station information storage means for storing base station information and identification information of the stored base station information and the base station having the largest received signal strength. Wireless position calculation comprising base station information selection means, requesting the server apparatus for information on the base station selected by the base station information selection means, and transferring necessary base station information from the server apparatus. apparatus.
て、測距結果と基地局の位置情報から端末の位置を計算
する位置計算手段と、位置計算手段によって算出された
端末の位置と上記基地局情報蓄積手段に蓄積されている
基地局の位置情報から端末−各基地局間の距離を計算す
る距離算出手段を具備し、上記基地局情報選択手段は、
端末−基地局間の距離が最も短い基地局の識別情報から
新たに必要となる基地局を判断する基地局情報選択手段
であることを特徴とする無線位置計算装置。2. The wireless position calculating device according to claim 1, wherein the position of the terminal is calculated from the distance measurement result and the position information of the base station. The information processing apparatus further includes a distance calculation unit that calculates a distance between the terminal and each base station from the position information of the base station stored in the station information storage unit.
A wireless position calculating device, which is a base station information selecting means for determining a newly required base station from identification information of a base station having a shortest distance between a terminal and a base station.
て、端末がサーバ装置に基地局情報を要求するときに、
端末が蓄積している基地局情報をサーバ装置に通知する
蓄積情報通知手段と、端末が蓄積していない基地局情報
をサーバ装置が選択的に転送する選択転送手段を具備す
ることを特徴とする無線位置計算装置。3. The wireless position calculating device according to claim 1, wherein when the terminal requests the base station information from the server device,
It is characterized by comprising storage information notifying means for notifying the base station information stored in the terminal to the server device, and selective transfer means for selectively transferring the base station information not stored in the terminal to the server device. Wireless position calculator.
て、上記端末位置計算手段は、端末が蓄積している基地
局情報と測距結果をもとに、さらに位置計算に使用する
基地局の情報を選択する基地局選択使用手段を具備する
ことを特徴とする無線位置計算装置。4. A wireless position calculating apparatus according to claim 1, wherein said terminal position calculating means further calculates a base station used for position calculation based on base station information and ranging results accumulated by the terminal. A wireless position calculating device comprising a base station selecting and using means for selecting information.
て、上記基地局選択使用手段は遅延プロファイルの解析
により得られる各基地局−端末間の信号の信号対雑音電
力比（ＳＮＲ）が大きい順に複数の基地局を選択するこ
とを特徴とする無線位置計算装置。5. The wireless position calculating apparatus according to claim 4, wherein said base station selection and use means is arranged in ascending order of a signal-to-noise power ratio (SNR) of each base station-terminal signal obtained by analyzing a delay profile. A wireless position calculating device for selecting a plurality of base stations.
て、上記基地局選択使用手段は位置計算結果と基地局情
報から得られる各基地局−端末間の距離が短い順に複数
の基地局を選択することを特徴とする無線位置計算装
置。6. The wireless position calculating apparatus according to claim 4, wherein said base station selecting and using means selects a plurality of base stations in ascending order of a distance between each base station and a terminal obtained from a position calculation result and base station information. A wireless position calculation device.
て、上記基地局選択使用手段は各基地局−端末間の距離
と測距結果（擬似距離）の差である測距誤差が小さい順
に複数の基地局を選択することを特徴とする無線位置計
算装置。7. The radio position calculating apparatus according to claim 4, wherein said base station selecting and using means comprises a plurality of base station selecting and using means in order of ascending distance error, which is a difference between a distance between each base station and a terminal and a distance measurement result (pseudo distance). A wireless position calculating apparatus, wherein the base station is selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001077421A JP2002281541A (en) | 2001-03-19 | 2001-03-19 | Wireless position calculating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001077421A JP2002281541A (en) | 2001-03-19 | 2001-03-19 | Wireless position calculating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002281541A true JP2002281541A (en) | 2002-09-27 |
Family
ID=18934182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001077421A Pending JP2002281541A (en) | 2001-03-19 | 2001-03-19 | Wireless position calculating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002281541A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006214934A (en) * | 2005-02-04 | 2006-08-17 | Seiko Epson Corp | Positioning system, terminal device, control method of terminal device, control program of terminal device, and computer readable recording medium having recorded control program of terminal device |
| JP2009218894A (en) * | 2008-03-11 | 2009-09-24 | Nippon Telegr & Teleph Corp <Ntt> | Radio communication method, radio communication system, base station, and radio terminal |
| JP2011099809A (en) * | 2009-11-09 | 2011-05-19 | Mitsubishi Electric Corp | Radio positioning system, radio positioning method, and program |
| JP2020101568A (en) * | 2020-03-25 | 2020-07-02 | カシオ計算機株式会社 | Positioning device, positioning control method and program |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993653A (en) * | 1995-09-25 | 1997-04-04 | Nippon Telegr & Teleph Corp <Ntt> | Terminal equipment with position information display function |
| JPH114474A (en) * | 1997-06-13 | 1999-01-06 | Mitsubishi Electric Corp | Portable terminal equipment and information service system |
-
2001
- 2001-03-19 JP JP2001077421A patent/JP2002281541A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993653A (en) * | 1995-09-25 | 1997-04-04 | Nippon Telegr & Teleph Corp <Ntt> | Terminal equipment with position information display function |
| JPH114474A (en) * | 1997-06-13 | 1999-01-06 | Mitsubishi Electric Corp | Portable terminal equipment and information service system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006214934A (en) * | 2005-02-04 | 2006-08-17 | Seiko Epson Corp | Positioning system, terminal device, control method of terminal device, control program of terminal device, and computer readable recording medium having recorded control program of terminal device |
| JP2009218894A (en) * | 2008-03-11 | 2009-09-24 | Nippon Telegr & Teleph Corp <Ntt> | Radio communication method, radio communication system, base station, and radio terminal |
| JP2011099809A (en) * | 2009-11-09 | 2011-05-19 | Mitsubishi Electric Corp | Radio positioning system, radio positioning method, and program |
| JP2020101568A (en) * | 2020-03-25 | 2020-07-02 | カシオ計算機株式会社 | Positioning device, positioning control method and program |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8472968B1 (en) | Location-based detection of interference in cellular communications systems | |
| US7839814B2 (en) | Method and system for adjusting inter-scan period of a mobile station | |
| US7200392B2 (en) | Wireless communication network measurement data collection using infrastructure overlay-based handset location systems | |
| JP4100320B2 (en) | Position detection system and apparatus | |
| US6222483B1 (en) | GPS location for mobile phones using the internet | |
| US20110244859A1 (en) | Communication control apparatus, communication control method, program, terminal equipment and wireless communication system | |
| JP3959997B2 (en) | Vehicle traffic monitoring system and method | |
| US6999778B2 (en) | Multipath assistance for pilot phase measurement processes | |
| US6002936A (en) | System and method for informing network of terminal-based positioning method capabilities | |
| KR101160855B1 (en) | System and method to obtain signal acquisition assistance data | |
| KR100583010B1 (en) | Method for determining the location of a gps receiver using an estimated reference time | |
| RU2466510C2 (en) | Method, system and device to detect blind area | |
| US6973316B1 (en) | Position detecting method and apparatus | |
| EP1617693A1 (en) | Position information providing system, base station and position information providing method for use therewith | |
| US9056767B2 (en) | Dynamic access point based positioning | |
| US20010051527A1 (en) | Wireless position measurement terminal and wireless position measurement system | |
| WO2000075684A1 (en) | Positioning device using cellular communication | |
| MX2007005097A (en) | Determining a mobile station position based on pertinent location fingerprint data. | |
| JP2003207556A (en) | Terminal and server device in terminal position information system | |
| US9513362B2 (en) | Method for enhancing positioning measurement and communications apparatus utilizing the same | |
| CN101379854A (en) | Orientation supporting mobile terminal | |
| EP2542002A2 (en) | Location requests and measurement responses in wireless communications networks | |
| JP2002281541A (en) | Wireless position calculating device | |
| EP4298836A1 (en) | Discovery procedure for sidelink positioning | |
| JP2014020887A (en) | System and method for positioning radio terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040323 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050728 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050823 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20051220 |