WO2009119545A1 - 基地局配置設計支援システム、基地局配置設計支援方法及びプログラム - Google Patents
基地局配置設計支援システム、基地局配置設計支援方法及びプログラム Download PDFInfo
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- WO2009119545A1 WO2009119545A1 PCT/JP2009/055751 JP2009055751W WO2009119545A1 WO 2009119545 A1 WO2009119545 A1 WO 2009119545A1 JP 2009055751 W JP2009055751 W JP 2009055751W WO 2009119545 A1 WO2009119545 A1 WO 2009119545A1
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- the present invention is based on the priority claim of Japanese Patent Application: Japanese Patent Application No. 2008-076049 (filed on Mar. 24, 2008), the entire contents of which are incorporated herein by reference. Shall.
- the present invention relates to a base station arrangement design support system, a base station arrangement design support method, and a program that support the arrangement design of base stations in a mobile communication system.
- a countermeasure target point for which the radio quality is to be improved is given, and by extracting a station candidate point (improveable station candidate point) that can improve the radio quality of the countermeasure target point from a plurality of station candidate points
- the present invention relates to a base station arrangement design support system, a base station arrangement design support method, and a program for facilitating determination of an arrangement position of a base station.
- base station layout design using a base station layout design system having a radio wave propagation simulation function is being performed.
- one or a plurality of base stations are arranged at base station arrangement candidate points on the design target area, and an area that can be served by the base station group Estimate the ratio (area coverage) of the (service area) to the entire design target area.
- the area coverage is evaluated for other base station arrangement patterns, and evaluation is repeated until a base station arrangement pattern that achieves the desired area coverage is obtained.
- Patent Document 1 it is optimal to use a genetic algorithm so that the ratio of the area where the received power at the point of quality evaluation is a certain value or more is a predetermined value or more and the number of base stations is the minimum.
- a method of performing the conversion is disclosed.
- Patent Document 2 the installation position of the wireless LAN terminal is specified, and based on the specifications of the wireless LAN terminal and the wireless base station, the position and the number of wireless base stations for covering the specified wireless LAN terminal are described. A cell design method for calculation is disclosed.
- Patent Documents 1 and 2 are incorporated herein by reference. The following analysis is given from the perspective of the present invention.
- a place where a new base station is installed is considered using a station arrangement design system.
- station location candidate points that can improve the radio wave quality at the countermeasure target point (improveable station location candidate points) and those that are not Candidate points are considered to be mixed.
- the station location candidate points that cannot improve the radio wave quality at the countermeasure target point are excluded from the station location candidates at that time because they cannot satisfy the design requirements. Therefore, the simulation results at points other than the countermeasure target points are not used. This can be considered as a wasteful calculation as a result.
- Patent Document 1 is effective in a normal case where the coverage of the entire service area is an evaluation parameter for optimization, but in the above-described case where only a limited point is an evaluation parameter. Less effective. For this reason, it is still difficult to efficiently extract location candidates that can be improved.
- the method of Patent Document 2 seeks an arrangement layout of radio base stations that can be covered with a smaller number of terminals under the condition that the arrangement of terminals is substantially determined. Further, the method described in the publication is based on whether or not all wireless LAN terminals are covered within a circle centered on the wireless base station, with the wireless base station as a transmission point and the wireless LAN terminal as a reception point. It is a method of judging while increasing the number of installed. For this reason, when it is desired to obtain a better position from among a large number of radio base station installation position candidates (station position candidate points), it is wasteful and cannot be said to be an efficient method.
- the present invention has been made in view of the above-described circumstances, and the object of the present invention is to provide a countermeasure target point for which radio wave quality is to be improved, and among a plurality of station location candidate points, the radio wave quality of the countermeasure target point is provided.
- the following base station arrangement design support system for a mobile communication system uses an estimation means for estimating radio wave propagation characteristics at a plurality of station location candidate points with a point (measurement target point) where radio wave quality of a mobile communication system needs to be improved as a transmission point; Extraction means for extracting, from the plurality of station location candidate points, improvable station location candidate points that can improve the radio wave quality at the countermeasure target point, according to the estimation result obtained by the estimation unit.
- a base station arrangement design support method for a mobile communication system using a computer and a plurality of points (measurement target points) where radio wave quality needs to be improved are used as transmission points.
- the estimation step for estimating the radio wave propagation characteristic at the station location candidate point and the estimation result obtained by the estimation means the radio wave quality at the countermeasure target point can be improved from among the plurality of station location candidate points.
- An extraction step for extracting improvable station position candidate points is provided.
- a point (measurement target point) where radio wave quality needs to be improved is transmitted.
- radio wave quality of the countermeasure target point from the plurality of station location candidate points
- a program for causing the computer to execute extraction processing for extracting improvable station location candidate points can be recorded on a computer-readable storage medium.
- the present invention it is possible to efficiently select station location candidate points to be selected from a plurality of station location candidate points.
- the reason is that using the reversibility of radio wave propagation that the radio wave propagation characteristics do not change even if the positions of the transmission point and reception point are switched, the radio wave propagation characteristics are estimated using the target point to be improved as the transmission point.
- a configuration is adopted in which station location candidate points that can improve the radio wave quality are extracted from a plurality of station location candidate points.
- FIG. 1 is a functional block diagram of the base station arrangement design support system according to the first embodiment of this invention.
- a base station arrangement design support system according to a first embodiment of the present invention includes a memory 60 that stores object data 10 and countermeasure target point data 20, a radio wave propagation characteristic estimation unit (estimation unit) 30, And a control unit 50 functioning as an improvable station location candidate point extracting means (extracting means) 40.
- the object data 10 is data in which coordinate data indicating the position and shape of indoor and outdoor structures (objects) such as buildings and indoor equipment is stored.
- the countermeasure target point data 20 is coordinate data of a point where the radio wave quality needs to be improved, such as a place where a quality improvement request is reported from a service user in a wireless communication system or a place having high publicity.
- the radio wave propagation characteristic estimation means 30 has a function of estimating the radio wave propagation characteristic in the design target area using the countermeasure target point indicated in the countermeasure target point data 20 as a base point.
- the improvable station position candidate point extraction means 40 extracts station position candidate points (improveable station position candidate points) that can improve the radio wave quality of the countermeasure target point according to the estimation result obtained by the radio wave propagation characteristic estimation means 30. It has the function to do.
- the control unit 50 is a CPU that is operated by a computer program and functions as a radio wave propagation characteristic estimation unit (estimation unit) 30 and an improvable station location candidate point extraction unit (extraction unit) 40.
- the memory 60 is realized by various storage devices that also function as a working memory of the control unit 50 in addition to storing the object data 10, the countermeasure target point data 20, and a program to be executed by the control unit 50.
- FIG. 2 is a flowchart showing the operation of the base station arrangement design support system of the first embodiment.
- the radio wave propagation characteristic estimation means 30 sets station location candidate points using the object data 10.
- the center point is set as a candidate location point. Or it is good also as a gravity center of the building which exists in the area made into a design object.
- the height of the station location candidate point from the ground is a value obtained by adding the height of the building and the height of the antenna to be used.
- the radio wave propagation characteristic estimation means 30 estimates the propagation characteristic of the radio wave from the specific countermeasure target point included in the countermeasure target point data 20 to the station location candidate point (step S100 in FIG. 2). ).
- the ray launching method is used as the radio wave propagation estimation method, but other methods can also be used.
- a statistical path loss model considering the average building height in the propagation path can be applied.
- the improvable station position candidate point extraction unit 40 extracts improvable station position candidate points from a plurality of station position candidate points according to the estimation result obtained in step S100 (step S110 in FIG. 2). ).
- the improvable station location candidate point extraction means 40 evaluates the radio wave quality at the station location candidate point of interest.
- the radio wave propagation characteristics in space usually have reversibility even if the transmitter and the receiver are exchanged. Using this property, if a station candidate point that satisfies a predetermined radio wave quality is assumed to have placed a base station there, it is determined that the radio wave quality at the target point can be improved, and the station position candidate point that can be improved And
- the improvable station position candidate point extraction means 40 may evaluate the radio wave quality using the propagation loss with the gain added to the gain due to the directivity of the antenna used for the base station. For example, if it is preferable to extract including station location candidate points that can improve the radio wave quality only within a certain limited azimuth range, countermeasure target points from the station location candidate points can be set The direction in which the gain corresponding to the direction is the maximum value is set as the direction of the antenna at the station location candidate point.
- the improvable station position candidate point extraction unit 40 determines the position where the gain corresponding to the direction from the station position candidate point to the countermeasure target point is the smallest value among the settable antenna directions. Let it be the direction of the antenna at the candidate point.
- the radio wave quality can be evaluated for each settable azimuth, and only the station location candidate points satisfying the predetermined radio wave quality in all the azimuths can be set as improveable station location candidate points.
- a station location candidate point that can be improved is extracted.
- step S100 the propagation of radio waves from the countermeasure target point corresponding to the reception side, which is the opposite direction to the conventional radio wave propagation estimation method, to the station location candidate point corresponding to the transmission side. Estimate the characteristics.
- the conventional method it is necessary to repeat the simulation for the number of station location candidate points.
- the processing time can be greatly reduced as a result.
- FIG. 5 is a functional block diagram of the base station arrangement design support system according to the second embodiment of the present invention.
- a display unit 51 is added to the configuration of the first embodiment.
- the object data 11 to improvable station location candidate point extraction means 41 and control unit 61 to memory 71 in FIG. 5 are the object data 10 to improvable station location candidate point extraction means 40 and control unit of the first embodiment of the present invention. The description is omitted because it is the same as 50 to the memory 60.
- the display means 51 has a function of highlighting and displaying improvable station location candidate points.
- FIG. 6 is a flowchart showing the operation of the base station arrangement design support system of the second exemplary embodiment of the present invention.
- the improvable station position candidate point extraction unit 41 extracts improvable station position candidate points using the same method as in the first embodiment (step S111 in FIG. 6).
- the display means 51 highlights and displays the improvable station location candidate points obtained in step S111 (step S121 in FIG. 6).
- step S121 A specific display method in step S121 will be described. For example, it is possible to use a method in which the display unit 51 colors a grid that includes improvable station location candidate points.
- the display means 51 blinks a grid including improvable station position candidate points or an improvable station position candidate point.
- a method in which the display unit 51 displays a pattern on the entire building on the improvable station location candidate point can also be used.
- the designer can clearly recognize the improvable station position candidate points.
- the improvable station position candidate point extraction unit 41 sets the station position candidate points that satisfy the predetermined radio wave quality as the improvable station position candidate points that can improve the radio wave quality of the countermeasure target point. .
- the improvable station position candidate point extraction unit 41 sets the second radio wave quality (preset) having a value lower than the predetermined radio wave quality (first radio wave quality).
- the satisfied station location candidate points are determined and set as improvable station location candidate points.
- step S121 the display means 51 highlights the improvable station location candidate point and displays the value obtained by subtracting the first radio wave quality from the radio wave quality of the station location candidate point. Display in the vicinity of.
- the improvable station position candidate point extraction unit 41 obtains the second radio wave quality having a value lower than the predetermined radio wave quality (first radio wave quality). A station location candidate point that satisfies the second radio wave quality is determined and determined as a station location candidate point that can be improved. Then, in the subsequent step S121, the display means 51 displays a value obtained by subtracting the first radio wave quality from the radio wave quality of the station location candidate point in the vicinity of the improvable station location candidate point.
- FIG. 9 is a flowchart showing the operation of the base station arrangement design support system of the fourth exemplary embodiment of the present invention.
- the radio wave propagation characteristic estimation means 31 uses the same method as in the second embodiment to set a station location candidate point, and then estimates the radio wave propagation characteristics from a specific countermeasure target point to the station location candidate point. (Step S102).
- the radio wave propagation characteristic estimation means 31 similarly executes the estimation process of step S102 for the second and subsequent countermeasure target points (step S112).
- the improvable station location candidate point extraction unit 41 uses the same method as in step S111 of the second embodiment. Then, an improvable station location candidate point is extracted for each countermeasure target point (step S122).
- the display unit 51 highlights and displays the improvable station location candidate points obtained in step S122 (step S132). At this time, when the number of new base stations that can be arranged is one, the display means 51 highlights only the station position candidate points that can improve the radio wave quality of all the countermeasure target points as the improvable station position candidate points. To do.
- the display means 51 provides a display for grasping the degree of improvement for all countermeasure target points for each improvable station candidate point.
- a base station is arranged at a specific station candidate point and its station candidate point. By doing so, it may be displayed with a line connected to a countermeasure target point that can improve the radio wave quality.
- step S132 when there are a plurality of new base stations that can be arranged, a display for grasping the degree of improvement with respect to all countermeasure target points is performed for each improveable station candidate point.
- the present invention is applicable to uses such as station placement design in mobile communications.
- the improvement of the radio wave quality at the countermeasure target point is a necessary condition for the design
- the necessary condition can be satisfied, so that the design work can be performed efficiently.
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Abstract
Description
本発明は、日本国特許出願:特願2008-076049号(2008年 3月24日出願)の優先権主張に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
本発明は、移動通信システムの基地局の配置設計を支援する基地局配置設計支援システム、基地局配置設計支援方法及びプログラム関する。特に、電波品質を改善したい対策対象地点が与えられ、複数の置局候補点のうち、対策対象地点の電波品質を改善可能な置局候補点(改善可能置局候補点)を抽出することにより、基地局の配置位置の決定を容易にするための基地局配置設計支援システム、基地局配置設計支援方法及びプログラムに関する。
以下の分析は、本発明の観点から与えられる。
新たにサービスエリアを拡張する場合のほか、無線通信システムのサービス利用者から品質改善要求が報告された場所や、公共性が高い場所など(対策対象地点)の電波品質を改善するために、基地局配置設計システムを用いて新規基地局を設置する場所を検討する場合がある。
20 対策対象地点データ
30 電波伝搬特性推定手段
40 改善可能置局候補点抽出手段
50 制御部
60 メモリ
11 オブジェクトデータ
21 対策対象地点データ
31 電波伝搬特性推定手段
41 改善可能置局候補点抽出手段
51 表示手段
61 制御部
71 メモリ
図1は、本発明の第1の実施形態の基地局配置設計支援システムの機能ブロック図である。図1を参照すると、本発明の第1の実施形態の基地局配置設計支援システムは、オブジェクトデータ10及び対策対象地点データ20を記憶するメモリ60と、電波伝搬特性推定手段(推定手段)30及び改善可能置局候補点抽出手段(抽出手段)40として機能する制御部50と、を含んで構成される。
続いて、本発明の第2の実施形態について図面を参照して詳細に説明する。
続いて、本発明の第3の実施形態について図面を参照して詳細に説明する。本発明の第3の実施形態は、上記した第2の実施形態と同様の構成にて実現することができる(図5参照)。また、動作においても、図6のフローチャートのステップS111における具体的な改善可能置局候補点抽出方法とステップS121における具体的な表示方法が、上記本発明の第2の実施形態と異なるのみであるので、以下、図5、図6を用いてその相違点を説明する。
続いて、複数の対策対象地点の電波品質を同時に改善できるようにした本発明の第4の実施形態について図面を参照して詳細に説明する。本発明の第4の実施形態は、上記した第2の実施形態と同様の構成にて実現することができる(図5参照)。以下、図9を用いてその動作上の相違点を説明する。
なお、前述の特許文献等の各開示を、本書に引用をもって繰り込むものとする。本発明の全開示(請求の範囲を含む)の枠内において、さらにその基本的技術思想に基づいて、実施形態ないし実施例の変更・調整が可能である。また、本発明の請求の範囲の枠内において種々の開示要素の多様な組み合わせないし選択が可能である。すなわち、本発明は、請求の範囲を含む全開示、技術的思想にしたがって当業者であればなし得るであろう各種変形、修正を含むことは勿論である。
Claims (14)
- 移動通信システムにおける電波品質の改善の必要がある地点(対策対象地点)を送信点として、複数の置局候補点における電波伝搬特性を推定する推定手段と、
前記推定手段で得られた推定結果に応じて、前記複数の置局候補点の中から、前記対策対象地点の電波品質を改善可能な改善可能置局候補点を抽出する抽出手段と、を含むことを特徴とする基地局配置設計支援システム。 - 前記抽出手段において、前記推定手段で得られた推定結果を用いて前記置局候補点における電波品質を評価し、前記置局候補点における前記電波品質が前記所定の電波品質を満たす場合には前記置局候補点を前記改善可能置局候補点とする請求項1に記載の基地局配置設計支援システム。
- 前記抽出手段は、前記推定手段で得られた推定結果にアンテナの指向性によるゲインを付加して電波品質を評価する請求項1または2に記載の基地局配置設計支援システム。
- 前記抽出手段は、前記アンテナの指向性によるゲインを付加する際に、当該置局候補点において設定可能なアンテナの方位の中で前記置局候補点から対策対象地点の方向に対応するゲインが最も大きくなる方位を採用する請求項3に記載の基地局配置設計支援システム。
- 前記抽出手段は、前記アンテナの指向性によるゲインを付加する際に、当該置局候補点において設定可能なアンテナの方位の中で前記置局候補点から対策対象地点の方向に対応するゲインが最も小さくなる方位を採用する請求項3に記載の基地局配置設計支援システム。
- 前記抽出手段は、当該置局候補点において設定可能なアンテナの方位ごとに電波品質を評価し、すべての方位で所定の電波品質を満たした前記置局候補点のみを前記改善可能置局候補点として抽出する請求項3に記載の基地局配置設計支援システム。
- 前記対策対象地点が複数ある場合に、前記推定手段は、前記対策対象地点ごとに電波伝搬特性を推定し、前記抽出手段は、前記対策対象地点ごとに前記改善可能置局候補点を抽出する請求項1乃至6いずれか一に記載の基地局配置設計支援システム。
- 所定の地図上に、前記改善可能置局候補点を強調して表示する請求項1乃至7いずれか一に記載の基地局配置設計支援システム。
- 所定の電波品質(第1の電波品質)よりも低い値を持つ第2の電波品質を定め、前記第2の電波品質を満たした置局候補点を改善可能置局候補点とし、該改善可能置局候補点を表した地図上に、当該置局候補点の電波品質から第1の電波品質を差し引いた値を改善可能置局候補点の近傍に表示する請求項1乃至8いずれか一に記載の基地局配置設計支援システム。
- 所定の地図上に、複数の対策対象地点と、前記複数の対策対象地点のすべての電波品質を改善可能な改善可能置局候補点を強調して表示する請求項7乃至9いずれか一に記載の基地局配置設計支援システム。
- 電波品質を改善可能な前記対策対象地点の数により、所定の地図上の、前記改善可能置局候補点を色分け表示することを特徴とする請求項7乃至10いずれか一に記載の基地局配置設計支援システム。
- 改善可能置局候補点と、当該改善可能置局候補点が電波品質を改善可能な対策対象地点とを対応付けて表示する請求項7乃至10いずれか一に記載の基地局配置設計支援システム。
- コンピュータを用いた移動通信システムの基地局配置設計支援方法であって、
電波品質の改善の必要がある地点(対策対象地点)を送信点として、複数の置局候補点における電波伝搬特性を推定する推定ステップと、
前記推定手段で得られた推定結果に応じて、前記複数の置局候補点の中から、前記対策対象地点の電波品質を改善可能な改善可能置局候補点を抽出する抽出ステップと、を含む基地局配置設計支援方法。 - 移動通信システムの基地局配置設計支援システムを構成するコンピュータに実行させるプログラムであって、
電波品質の改善の必要がある地点(対策対象地点)を送信点として、複数の置局候補点における電波伝搬特性を推定する推定処理と、
前記推定手段で得られた推定結果に応じて、前記複数の置局候補点の中から、前記対策対象地点の電波品質を改善可能な改善可能置局候補点を抽出する抽出処理と、を前記コンピュータに実行させるプログラム。
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2011234091A (ja) * | 2010-04-27 | 2011-11-17 | Nippon Telegr & Teleph Corp <Ntt> | 置局設計方法、置局設計装置、及び置局設計プログラム |
JP2013046362A (ja) * | 2011-08-26 | 2013-03-04 | Nippon Telegr & Teleph Corp <Ntt> | 置局設計方法、置局設計プログラムおよび置局設計装置 |
WO2013128613A1 (ja) * | 2012-03-01 | 2013-09-06 | 富士通株式会社 | 管理装置、通信品質改善候補特定方法、通信品質改善候補特定プログラム、通信経路特定装置、通信経路特定方法、通信経路特定プログラム、及び無線通信システム |
JP2014179734A (ja) * | 2013-03-14 | 2014-09-25 | Toshiba Corp | 制御装置、代表基地局、無線通信システム及び基地局制御方法 |
JP2018056771A (ja) * | 2016-09-28 | 2018-04-05 | ソフトバンク株式会社 | シミュレーション装置および制御プログラム |
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JPWO2021199151A1 (ja) * | 2020-03-30 | 2021-10-07 |
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KR102084968B1 (ko) * | 2018-07-30 | 2020-03-05 | 주식회사 엘지유플러스 | 무선 통신 서비스 제공 장치의 설치 위치를 판단하는 장치 및 방법 |
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JP2011234091A (ja) * | 2010-04-27 | 2011-11-17 | Nippon Telegr & Teleph Corp <Ntt> | 置局設計方法、置局設計装置、及び置局設計プログラム |
JP2013046362A (ja) * | 2011-08-26 | 2013-03-04 | Nippon Telegr & Teleph Corp <Ntt> | 置局設計方法、置局設計プログラムおよび置局設計装置 |
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JP2014179734A (ja) * | 2013-03-14 | 2014-09-25 | Toshiba Corp | 制御装置、代表基地局、無線通信システム及び基地局制御方法 |
KR101548856B1 (ko) | 2013-03-14 | 2015-08-31 | 가부시끼가이샤 도시바 | 제어 장치, 대표 기지국 및 기지국 제어 방법 |
JP2018056771A (ja) * | 2016-09-28 | 2018-04-05 | ソフトバンク株式会社 | シミュレーション装置および制御プログラム |
WO2020004171A1 (ja) * | 2018-06-27 | 2020-01-02 | 日本電気株式会社 | 配置変更管理装置、配置変更管理方法、及び、配置変更管理プログラムが格納された記録媒体 |
JPWO2020004171A1 (ja) * | 2018-06-27 | 2021-07-08 | 日本電気株式会社 | 配置変更管理装置、配置変更管理方法、及び、配置変更管理プログラム |
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JP7294339B2 (ja) | 2018-06-27 | 2023-06-20 | 日本電気株式会社 | 配置変更管理装置、配置変更管理方法、及び、配置変更管理プログラム |
JPWO2021199151A1 (ja) * | 2020-03-30 | 2021-10-07 | ||
WO2021199151A1 (ja) * | 2020-03-30 | 2021-10-07 | 日本電信電話株式会社 | 置局支援方法、置局支援装置、及び置局支援プログラム |
JP7307389B2 (ja) | 2020-03-30 | 2023-07-12 | 日本電信電話株式会社 | 置局支援方法、置局支援装置、及び置局支援プログラム |
Also Published As
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JPWO2009119545A1 (ja) | 2011-07-21 |
US20110003596A1 (en) | 2011-01-06 |
US8718712B2 (en) | 2014-05-06 |
JP5234105B2 (ja) | 2013-07-10 |
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