JP4598662B2 - Wireless information collection system - Google Patents

Wireless information collection system Download PDF

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JP4598662B2
JP4598662B2 JP2005339898A JP2005339898A JP4598662B2 JP 4598662 B2 JP4598662 B2 JP 4598662B2 JP 2005339898 A JP2005339898 A JP 2005339898A JP 2005339898 A JP2005339898 A JP 2005339898A JP 4598662 B2 JP4598662 B2 JP 4598662B2
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distribution
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wireless terminal
reception state
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昇男 佐藤
隆国 道関
賢司 鈴木
恒夫 束原
充 原田
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Nippon Telegraph and Telephone Corp
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本発明は、通信障害の分布を検出する無線情報収集システムに関するものである。   The present invention relates to a wireless information collection system for detecting a distribution of communication failures.

従来より、無線ネットワーク制御装置と、無線ネットワーク制御装置に収容され無線エリアを管轄する無線基地局と、無線基地局の無線エリア内を移動する無線端末装置とを有する移動通信システムがある。このような移動通信システムでは、複数の無線基地局を統括する無線ネットワーク制御装置が無線基地局および無線端末装置に対して受信レベル測定や干渉レベル測定、その他のモニタ要求を行い、受信したモニタ結果を基に、送信電力制御用基準レベルの設定やハンドオーバを行うかどうかの判定を行っていた（例えば特許文献１参照）。   2. Description of the Related Art Conventionally, there is a mobile communication system that includes a radio network control device, a radio base station that is accommodated in the radio network control device and controls a radio area, and a radio terminal device that moves within the radio area of the radio base station. In such a mobile communication system, a wireless network control device that controls a plurality of wireless base stations performs reception level measurement, interference level measurement, and other monitoring requests to the wireless base station and wireless terminal device, and the received monitoring results Based on the above, it is determined whether to set a reference level for transmission power control and whether to perform a handover (for example, see Patent Document 1).

特開２００４−２３５７２５号公報JP 2004-235725 A

しかしながら、従来の移動通信システムでは、個々の無線端末装置と無線基地局との間の受信レベルを調べることはできるが、通信サービスエリア内における通信障害の分布を検出することはできないという問題点があった。このような通信障害の分布を作成することができれば、通信障害の復旧対策や通信障害の回避に役立てることができる。しかし、通信障害の分布を調べるためには、専用のセンサ等を広い通信サービスエリアにわたって配置する必要があり、システムの規模が増大する。   However, in the conventional mobile communication system, it is possible to check the reception level between each wireless terminal device and the wireless base station, but it is impossible to detect the distribution of communication failures in the communication service area. there were. If such a distribution of communication faults can be created, it can be used for measures for recovering from communication faults and avoiding communication faults. However, in order to examine the distribution of communication failures, it is necessary to arrange dedicated sensors or the like over a wide communication service area, which increases the scale of the system.

本発明は、上記課題を解決するためになされたもので、システム規模の増大を抑えつつ、広いエリアにわたって通信障害の分布を検出することができる無線情報収集システムを提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wireless information collection system that can detect the distribution of communication failures over a wide area while suppressing an increase in system scale.

本発明の無線情報収集システムは、複数の無線端末装置と、前記無線端末装置と通信し、前記無線端末装置との間の送受信状態を示す送受信状態情報を無線端末装置毎に取得する無線基地局と、各無線端末装置の位置情報を取得する位置情報取得手段と、前記無線基地局が取得した無線端末装置毎の送受信状態情報と前記位置情報取得手段が取得した無線端末装置毎の位置情報とに基づいて、前記無線端末装置と前記無線基地局とが通信可能なエリアにおける通信障害の二次元的配置を示す通信障害分布を作成する分布作成手段とを有し、前記分布作成手段は、前記無線端末装置毎の送受信状態情報と位置情報とから、前記通信可能エリアにおける前記送受信状態の状況を示す送受信状態分布を作成する統計処理部と、前記送受信状態分布に基づいて前記通信障害分布を作成する判定部とを備え、前記送受信状態情報は、前記無線端末装置から受信した電波の復調可否情報を含み、前記統計処理部は、前記送受信状態分布として前記通信可能エリアにおける復調不可地点を示す復調不可地点分布を作成し、前記判定部は、前記復調不可地点の総面積が所定のしきい値より大きい場合、この復調不可地点に広帯域電磁雑音が発生していると判定し、この広帯域電磁雑音の有無を示す分布を前記通信障害分布として作成することを特徴とするものである。
また、本発明の無線情報収集システムの１構成例において、前記判定部は、前記復調不可地点の総面積が所定のしきい値より大きく、かつ前記復調不可地点内に存在する無線端末装置の台数を前記復調不可地点の所定の面積で割った無線端末装置の密度が所定の台数しきい値より大きい場合に、広帯域電磁雑音が発生していると判定することを特徴とするものである。 The wireless information collection system of the present invention includes a plurality of wireless terminal devices, a wireless base station that communicates with the wireless terminal device and acquires transmission / reception state information indicating a transmission / reception state between the wireless terminal devices for each wireless terminal device Position information acquisition means for acquiring position information of each wireless terminal apparatus, transmission / reception state information for each wireless terminal apparatus acquired by the wireless base station, position information for each wireless terminal apparatus acquired by the position information acquisition means, based on, possess a distribution creation means and said radio terminal apparatus and the radio base station to create a communication failure distribution indicating a two-dimensional arrangement of the communication failure in a communicable area, the distribution generation unit, the A statistical processing unit that creates a transmission / reception state distribution indicating the state of the transmission / reception state in the communicable area from the transmission / reception state information and position information for each wireless terminal device, and the transmission / reception state distribution And the transmission / reception state information includes demodulating propriety information of radio waves received from the wireless terminal device, and the statistical processing unit is capable of the communication as the transmission / reception state distribution. A non-demodulable point distribution indicating a non-demodulable point in the area is created, and the determination unit generates a broadband electromagnetic noise at the non-demodulable point when the total area of the non-demodulable point is larger than a predetermined threshold. And a distribution indicating the presence or absence of the broadband electromagnetic noise is created as the communication failure distribution .
Further, in one configuration example of the wireless information collection system of the present invention, the determination unit is configured such that the total area of the non-demodulable points is larger than a predetermined threshold and the number of wireless terminal devices existing in the non-demodulable points Is divided by a predetermined area of the non-demodulable point and the density of the wireless terminal device is larger than a predetermined number threshold, it is determined that broadband electromagnetic noise is generated .

また、本発明の無線情報収集システムは、複数の無線端末装置と、前記無線端末装置と通信し、前記無線端末装置との間の送受信状態を示す送受信状態情報を無線端末装置毎に取得する無線基地局と、各無線端末装置の位置情報を取得する位置情報取得手段と、前記無線基地局が取得した無線端末装置毎の送受信状態情報と前記位置情報取得手段が取得した無線端末装置毎の位置情報とに基づいて、前記無線端末装置と前記無線基地局とが通信可能なエリアにおける通信障害の二次元的配置を示す通信障害分布を作成する分布作成手段とを有し、前記分布作成手段は、前記無線端末装置毎の送受信状態情報と位置情報とから、前記通信可能エリアにおける前記送受信状態の状況を示す送受信状態分布を作成する統計処理部と、前記送受信状態分布を記憶する記憶部と、前記統計処理部が作成した現時点の送受信状態分布と前記記憶部に記憶された過去の送受信状態分布とから、前記通信可能エリアにおける前記送受信状態の変位を示す変位分布を作成し、この変位分布に基づいて前記通信障害分布を作成する判定部とを備え、前記送受信状態情報は、前記無線端末装置から受信した電波の復調可否情報を含み、前記統計処理部は、前記送受信状態分布として前記通信可能エリアにおける復調不可地点を示す復調不可地点分布を作成し、前記判定部は、前記統計処理部が作成した現時点の復調不可地点分布と前記記憶部に記憶された過去の復調不可地点分布とから、前記通信可能エリアにおける復調不可地点の変位分布を作成し、前記復調不可地点の変位分布の総面積が所定のしきい値より大きい場合、この復調不可地点に広帯域電磁雑音が発生していると判定し、この広帯域電磁雑音の有無を示す分布を前記通信障害分布として作成することを特徴とするものである。
また、本発明の無線情報収集システムの１構成例において、前記判定部は、前記復調不可地点の変位分布の総面積が所定のしきい値より大きく、かつ前記復調不可地点内に存在する無線端末装置の台数を前記復調不可地点の変位分布の所定の面積で割った無線端末装置の密度が所定の台数しきい値より大きい場合に、広帯域電磁雑音が発生していると判定することを特徴とするものである。
また、本発明の無線情報収集システムは、複数の無線端末装置と、前記無線端末装置と通信し、前記無線端末装置との間の送受信状態を示す送受信状態情報を無線端末装置毎に取得する無線基地局と、各無線端末装置の位置情報を取得する位置情報取得手段と、前記無線基地局が取得した無線端末装置毎の送受信状態情報と前記位置情報取得手段が取得した無線端末装置毎の位置情報とに基づいて、前記無線端末装置と前記無線基地局とが通信可能なエリアにおける通信障害の二次元的配置を示す通信障害分布を作成する分布作成手段とを有し、前記分布作成手段は、前記無線端末装置毎の送受信状態情報と位置情報とから、前記通信可能エリアにおける前記送受信状態の状況を示す送受信状態分布を作成する統計処理部と、前記送受信状態分布を記憶する記憶部と、前記統計処理部が作成した現時点の送受信状態分布と前記記憶部に記憶された過去の送受信状態分布とから、前記通信可能エリアにおける前記送受信状態の変位を示す変位分布を作成し、この変位分布に基づいて前記通信障害分布を作成する判定部とを備え、前記送受信状態情報は、受信電波強度の情報を含み、前記統計処理部は、前記送受信状態分布として受信電波強度分布を作成し、前記判定部は、前記統計処理部が作成した現時点の受信電波強度分布と前記記憶部に記憶された過去の受信電波強度分布とから、前記通信可能エリアにおける受信電波強度の変位分布を作成し、前記受信電波強度の変位が負で、かつ変位の絶対値が所定のしきい値より大きい状態が所定の時間継続している地点が存在する場合、この地点に広帯域電磁雑音が発生していると判定し、この広帯域電磁雑音の有無を示す分布を前記通信障害分布として作成することを特徴とするものである。 In addition, the wireless information collection system of the present invention communicates with a plurality of wireless terminal devices and the wireless terminal device, and obtains transmission / reception state information indicating a transmission / reception state between the wireless terminal devices for each wireless terminal device. A base station, position information acquisition means for acquiring position information of each wireless terminal apparatus, transmission / reception state information for each wireless terminal apparatus acquired by the wireless base station, and position for each wireless terminal apparatus acquired by the position information acquisition means Distribution creating means for creating a communication failure distribution indicating a two-dimensional arrangement of communication failures in an area where the wireless terminal device and the wireless base station can communicate based on information, and the distribution creating means A statistical processing unit that creates a transmission / reception state distribution indicating a state of the transmission / reception state in the communicable area from the transmission / reception state information and position information for each wireless terminal device; and the transmission / reception state Displacement distribution indicating displacement of the transmission / reception state in the communicable area from a storage unit for storing cloth, a current transmission / reception state distribution created by the statistical processing unit, and a past transmission / reception state distribution stored in the storage unit And a determination unit that creates the communication failure distribution based on the displacement distribution, the transmission / reception state information includes information on whether radio waves received from the wireless terminal device can be demodulated, and the statistical processing unit includes: A non-demodulable point distribution indicating a non-demodulable point in the communicable area is created as the transmission / reception state distribution, and the determination unit is the current non-demodulable point distribution created by the statistical processing unit and the past stored in the storage unit A displacement distribution of non-demodulable points in the communicable area is created from the distribution of non-demodulable points, and the total area of the displacement distribution of the non-demodulable points is a predetermined threshold. Greater than, broadband electromagnetic noise is determined to be generated in the demodulation impossible point, it is characterized in that to create a distribution indicating the presence or absence of the wide-band electromagnetic noise as the communication failure distribution.
Moreover, in one configuration example of the wireless information collection system of the present invention, the determination unit includes a wireless terminal that has a total area of displacement distribution of the non-demodulable point larger than a predetermined threshold value and exists in the non-demodulable point. When the density of the wireless terminal device obtained by dividing the number of devices by a predetermined area of the displacement distribution of the non-demodulable point is larger than a predetermined number threshold, it is determined that broadband electromagnetic noise is generated. To do .
In addition, the wireless information collection system of the present invention communicates with a plurality of wireless terminal devices and the wireless terminal device, and obtains transmission / reception state information indicating a transmission / reception state between the wireless terminal devices for each wireless terminal device. A base station, position information acquisition means for acquiring position information of each wireless terminal apparatus, transmission / reception state information for each wireless terminal apparatus acquired by the wireless base station, and position for each wireless terminal apparatus acquired by the position information acquisition means Distribution creating means for creating a communication failure distribution indicating a two-dimensional arrangement of communication failures in an area where the wireless terminal device and the wireless base station can communicate based on information, and the distribution creating means A statistical processing unit that creates a transmission / reception state distribution indicating a state of the transmission / reception state in the communicable area from the transmission / reception state information and position information for each wireless terminal device; and the transmission / reception state Displacement distribution indicating displacement of the transmission / reception state in the communicable area from a storage unit for storing cloth, a current transmission / reception state distribution created by the statistical processing unit, and a past transmission / reception state distribution stored in the storage unit And a determination unit that generates the communication failure distribution based on the displacement distribution, the transmission / reception state information includes information on received radio wave intensity, and the statistical processing unit receives the received radio wave as the transmission / reception state distribution. An intensity distribution is created, and the determination unit determines the received radio wave intensity in the communicable area from the current received radio wave intensity distribution created by the statistical processing unit and the past received radio wave intensity distribution stored in the storage unit. When a displacement distribution is created, and there is a point where the displacement of the received radio wave intensity is negative and the state where the absolute value of the displacement is greater than a predetermined threshold continues for a predetermined time, Point determines that broadband electromagnetic noise is generated in the, it is characterized in that to create a distribution indicating the presence or absence of the wide-band electromagnetic noise as the communication failure distribution.

また、本発明の無線情報収集システムの１構成例において、前記位置情報取得手段は、前記無線端末装置と少なくとも１つの前記無線基地局との通信により前記無線端末装置の位置を特定して、前記位置情報を取得するものである。
また、本発明の無線情報収集システムの１構成例において、前記位置情報取得手段は、前記無線端末装置から送信された前記位置情報を前記無線基地局を介して取得するものである。
また、本発明の無線情報収集システムの１構成例において、前記無線基地局は、前記送受信状態情報を複数の無線周波数について求めるものである。
また、本発明の無線情報収集システムの１構成例において、前記無線基地局は、前記通信可能エリア内に複数配置され、前記分布作成手段は、前記通信障害分布を無線基地局毎に作成するものである。 Further, in one configuration example of the wireless information collection system of the present invention, the position information acquisition unit specifies the position of the wireless terminal device by communication between the wireless terminal device and at least one of the wireless base stations, and The position information is acquired.
Moreover, in one configuration example of the wireless information collection system of the present invention, the position information acquisition means acquires the position information transmitted from the wireless terminal device via the wireless base station.
In one configuration example of the wireless information collection system of the present invention, the wireless base station obtains the transmission / reception state information for a plurality of wireless frequencies.
Further, in one configuration example of the wireless information collection system of the present invention, a plurality of the wireless base stations are arranged in the communicable area, and the distribution creating means creates the communication failure distribution for each wireless base station. It is.

本発明によれば、無線基地局が取得した無線端末装置毎の送受信状態情報と位置情報取得手段が取得した無線端末装置毎の位置情報とに基づいて、通信可能エリアにおける通信障害の二次元的配置を示す通信障害分布を作成することができる。また、本発明では、専用のセンサを用いることなく通信障害分布を作成することができるので、システム規模の増大を抑えることができる。   According to the present invention, based on the transmission / reception state information for each wireless terminal apparatus acquired by the wireless base station and the position information for each wireless terminal apparatus acquired by the position information acquisition unit, the two-dimensional communication failure in the communicable area is achieved. A communication failure distribution indicating the arrangement can be created. In the present invention, since a communication failure distribution can be created without using a dedicated sensor, an increase in system scale can be suppressed.

また、本発明では、無線端末装置毎の送受信状態情報と位置情報とから、通信可能エリアにおける送受信状態分布を作成することにより、この送受信状態分布に基づいて通信障害分布を作成することができる。   Also, in the present invention, a communication failure distribution can be created based on this transmission / reception state distribution by creating a transmission / reception state distribution in the communicable area from the transmission / reception state information and position information for each wireless terminal device.

また、本発明では、無線端末装置毎の送受信状態情報と位置情報とから、通信可能エリアにおける送受信状態分布を作成し、現時点の送受信状態分布と過去の送受信状態分布とから通信可能エリアにおける送受信状態の変位分布を作成することにより、この変位分布に基づいて通信障害分布を作成することができる。   In the present invention, a transmission / reception state distribution in the communicable area is created from the transmission / reception state information and position information for each wireless terminal device, and the transmission / reception state in the communicable area is determined from the current transmission / reception state distribution and the past transmission / reception state distribution. By creating the displacement distribution, it is possible to create a communication failure distribution based on this displacement distribution.

また、本発明では、送受信状態分布として通信可能エリアにおける復調不可地点を示す復調不可地点分布を作成し、この復調不可地点分布と所定のしきい値を比較することにより、広帯域電磁雑音を検出することができる。
また、本発明では、送受信状態分布として通信可能エリアにおける復調不可地点分布を作成し、現時点の復調不可地点分布と過去の復調不可地点分布とから復調不可地点の変位分布を作成し、この変位分布と所定のしきい値を比較することにより、広帯域電磁雑音を検出することができる。
また、本発明では、復調不可地点の総面積又は復調不可地点の変位分布の総面積が所定のしきい値より大きく、かつ復調不可地点内に存在する無線端末装置の台数を復調不可地点の所定の面積又は復調不可地点の変位分布の所定の面積で割った無線端末装置の密度が所定の台数しきい値より大きい場合のみ、広帯域電磁雑音が発生していると判定することにより、広帯域電磁雑音の検出の確度を向上させることができる。 In the present invention, a non-demodulable point distribution indicating a non-demodulable point distribution in a communicable area is created as a transmission / reception state distribution, and broadband electromagnetic noise is detected by comparing this non-demodulable point distribution with a predetermined threshold. be able to.
Further, in the present invention, a non-demodulable point distribution in the communicable area is created as a transmission / reception state distribution, and a displacement distribution of non-demodulable points is created from the current non-demodulable point distribution and the past non-demodulable point distribution. And a predetermined threshold value, broadband electromagnetic noise can be detected.
In the present invention, the total area of the non-demodulable points or the total area of the displacement distribution of the non-demodulable points is larger than a predetermined threshold value, and the number of wireless terminal devices existing in the non-demodulable points is determined as the predetermined non-demodulable points. By determining that broadband electromagnetic noise is generated only when the density of the wireless terminal device divided by the predetermined area of the displacement distribution of the area or the non-demodulable point distribution is larger than the predetermined number threshold, The accuracy of detection can be improved.

また、本発明では、送受信状態分布として受信電波強度分布を作成し、現時点の受信電波強度分布と過去の受信電波強度分布とから通信可能エリアにおける受信電波強度の変位分布を作成し、この変位分布と所定のしきい値を比較することにより、通信障害分布を作成することができる。   Further, in the present invention, a received radio wave intensity distribution is created as a transmission / reception state distribution, and a displacement distribution of a received radio wave intensity in a communicable area is created from a current received radio wave intensity distribution and a past received radio wave intensity distribution. And a predetermined threshold value can be compared to create a communication failure distribution.

また、本発明では、送受信状態分布として受信電波強度分布を作成し、現時点の受信電波強度分布と過去の受信電波強度分布とから通信可能エリアにおける受信電波強度の変位分布を作成し、この変位分布と所定のしきい値を比較することにより、広帯域電磁雑音を検出することができる。   Further, in the present invention, a received radio wave intensity distribution is created as a transmission / reception state distribution, and a displacement distribution of a received radio wave intensity in a communicable area is created from a current received radio wave intensity distribution and a past received radio wave intensity distribution. And a predetermined threshold value, broadband electromagnetic noise can be detected.

また、本発明では、無線端末装置と少なくとも１つの無線基地局との通信により無線端末装置の位置を特定することにより、無線端末装置の位置情報を取得することができる。   In the present invention, the position information of the wireless terminal device can be acquired by specifying the position of the wireless terminal device through communication between the wireless terminal device and at least one wireless base station.

また、本発明では、無線端末装置から送信された位置情報を無線基地局を介して受信することにより、無線端末装置の位置情報を取得することができる。   In the present invention, the position information of the wireless terminal device can be acquired by receiving the position information transmitted from the wireless terminal device via the wireless base station.

また、本発明では、送受信状態情報を複数の無線周波数について求めることにより、広帯域電磁雑音の検出精度を向上させることができる。   In the present invention, the detection accuracy of broadband electromagnetic noise can be improved by obtaining transmission / reception state information for a plurality of radio frequencies.

また、通信障害分布を無線基地局毎に作成することにより、複数の無線基地局がカバーする広い通信可能エリアにわたって通信障害分布を作成することができる。   Also, by creating a communication failure distribution for each radio base station, it is possible to create a communication failure distribution over a wide communicable area covered by a plurality of radio base stations.

［第１の実施の形態］
以下、本発明の実施の形態について図面を参照して説明する。図１は本発明の第１の実施の形態となる無線情報収集システムの構成を示すブロック図である。本実施の形態の無線情報収集システムは、例えば携帯電話機等の複数の無線端末装置１と、無線端末装置１と通信し、無線端末装置１との間の送受信状態を示す送受信状態情報を無線端末装置毎に取得する無線基地局２と、無線端末装置１と相手端末とを固定電話網等の公衆網６又は無線基地局２を介して接続する移動通信交換局３と、各無線端末装置１の位置情報を記憶する位置データベース４と、無線基地局２が取得した無線端末装置毎の送受信状態情報と無線端末装置１の位置情報とに基づいて、通信可能エリアにおける通信障害の二次元的配置を示す通信障害分布を作成する統計処理装置５（分布作成手段）とから構成される。 [First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a wireless information collecting system according to the first embodiment of the present invention. The wireless information collection system according to the present embodiment communicates with a plurality of wireless terminal devices 1 such as mobile phones and the wireless terminal device 1, and transmits / receives transmission / reception state information indicating a transmission / reception state between the wireless terminal devices 1 to the wireless terminal A wireless base station 2 acquired for each device, a mobile communication switching center 3 that connects the wireless terminal device 1 and a counterpart terminal via a public network 6 such as a fixed telephone network or the wireless base station 2, and each wireless terminal device 1 Based on the location database 4 for storing the location information, the transmission / reception state information for each wireless terminal device acquired by the wireless base station 2, and the location information of the wireless terminal device 1, the two-dimensional arrangement of communication failures in the communicable area And a statistical processing device 5 (distribution creating means) for creating a communication failure distribution indicating

図１において、７はセルであり、各無線基地局２がカバーする領域、すなわち無線基地局２からの電波が届く領域である。移動通信交換局３と位置データベース４とは、各無線端末装置１の位置情報を取得する位置情報取得手段を構成している。   In FIG. 1, reference numeral 7 denotes a cell, which is an area covered by each radio base station 2, that is, an area where radio waves from the radio base station 2 reach. The mobile communication switching center 3 and the position database 4 constitute position information acquisition means for acquiring the position information of each wireless terminal device 1.

図２は無線基地局２の構成例を示すブロック図である。無線基地局２は、アンテナ２０と、アンテナ２０を介して無線端末装置１からの電波を受信する受信部２１と、アンテナ２０を介して無線端末装置１に電波を送信する送信部２２と、無線端末装置毎の送受信状態情報を取得する電波状態取得部２３とを有する。   FIG. 2 is a block diagram illustrating a configuration example of the radio base station 2. The radio base station 2 includes an antenna 20, a receiving unit 21 that receives radio waves from the radio terminal device 1 via the antenna 20, a transmission unit 22 that transmits radio waves to the radio terminal device 1 via the antenna 20, And a radio wave state acquisition unit 23 that acquires transmission / reception state information for each terminal device.

図３は統計処理装置５の構成例を示すブロック図である。統計処理装置５は、無線端末装置毎の送受信状態情報と位置情報とから通信可能エリアにおける送受信状態分布を作成する統計処理部５０と、統計処理部５０が作成した送受信状態分布を記憶する記憶部５１と、統計処理部５０が作成した現時点の送受信状態分布と記憶部５１に記憶された過去の送受信状態分布とから通信可能エリアにおける送受信状態の変位分布を作成し、この変位分布に基づいて通信障害分布を作成する判定部５２とを有する。   FIG. 3 is a block diagram illustrating a configuration example of the statistical processing device 5. The statistical processing device 5 includes a statistical processing unit 50 that creates a transmission / reception state distribution in a communicable area from transmission / reception state information and position information for each wireless terminal device, and a storage unit that stores the transmission / reception state distribution created by the statistical processing unit 50 51, a transmission / reception state displacement distribution in the communicable area is created from the current transmission / reception state distribution created by the statistical processing unit 50 and the past transmission / reception state distribution stored in the storage unit 51, and communication is performed based on the displacement distribution. And a determination unit 52 that creates a failure distribution.

以下、本実施の形態の無線情報収集システムの動作を説明する。ここでは、１例として使用周波数を３００ＭＨｚ帯、１つの無線基地局２に割り当てられた領域であるセル７の大きさを５ｋｍ四方として説明する。
無線端末装置１と無線基地局２とは、無線端末装置１と相手端末とが音声データ等の通信情報をやり取りする通話時だけでなく、通話時以外の場合においても一定時間毎（例えば１秒毎）に通信を行っている。 Hereinafter, the operation of the wireless information collection system of this embodiment will be described. Here, as an example, the description will be made assuming that the use frequency is 300 MHz, and the size of the cell 7 that is an area allocated to one radio base station 2 is 5 km square.
The wireless terminal device 1 and the wireless base station 2 are not only at the time of a call in which communication information such as voice data is exchanged between the wireless terminal device 1 and the partner terminal, but also at regular intervals (for example, 1 second). Every).

無線基地局２の受信部２１は、アンテナ２０を介して受信した無線端末装置１からの電波を復調し、復調後の通信情報を移動通信交換局３に送信する。無線基地局２の電波状態取得部２３は、受信部２１が受信した無線端末装置１からの電波の強度を計測し、計測した受信電波強度を表すＲＳＳＩ（Received Signal Strength Indicator）と自局の識別番号（以下、基地局ＩＤとする）と無線端末装置１の電話番号等の識別番号（以下、端末ＩＤとする）とを含む送受信状態情報を移動通信交換局３に送信する。なお、通信情報と送受信状態情報とを例えば時分割多重して１つの通信回線により移動通信交換局３に送信するようにしてもよい。   The receiving unit 21 of the radio base station 2 demodulates the radio wave received from the radio terminal device 1 received via the antenna 20 and transmits the demodulated communication information to the mobile communication switching center 3. The radio wave state acquisition unit 23 of the radio base station 2 measures the intensity of the radio wave received from the radio terminal device 1 received by the reception unit 21, and the RSSI (Received Signal Strength Indicator) representing the measured received radio wave intensity and the identification of the own station. Transmission / reception state information including a number (hereinafter referred to as a base station ID) and an identification number (hereinafter referred to as a terminal ID) such as a telephone number of the wireless terminal device 1 is transmitted to the mobile communication switching center 3. The communication information and the transmission / reception state information may be time-division multiplexed, for example, and transmitted to the mobile communication switching center 3 through one communication line.

移動通信交換局３は、通話時に無線端末装置１と相手端末とを公衆網６又は無線基地局２を介して接続し、無線端末装置１から受信した通信情報を公衆網６又は無線基地局２を介して相手端末に送信すると共に、相手端末から受信した通信情報を無線基地局２を介して無線端末装置１に送信する。   The mobile communication switching center 3 connects the wireless terminal device 1 and the partner terminal via the public network 6 or the wireless base station 2 during a call, and transmits the communication information received from the wireless terminal device 1 to the public network 6 or the wireless base station 2. The communication information received from the counterpart terminal is transmitted to the radio terminal device 1 via the radio base station 2.

また、移動通信交換局３は、受信した送受信状態情報から端末ＩＤと基地局ＩＤを取得して、端末ＩＤに対応する無線端末装置１が基地局ＩＤに対応する無線基地局２のセル内に存在することを示す位置情報を位置データベース４に登録すると共に、送受信状態情報を統計処理装置５に送信する。移動通信交換局３は、このような位置データベース４の更新を送受信状態情報に応じて一定時間毎に行う。   Further, the mobile communication switching center 3 acquires the terminal ID and the base station ID from the received transmission / reception status information, and the wireless terminal device 1 corresponding to the terminal ID is in the cell of the wireless base station 2 corresponding to the base station ID. The position information indicating the presence is registered in the position database 4, and the transmission / reception state information is transmitted to the statistical processing device 5. The mobile communication switching center 3 updates such a location database 4 at regular intervals according to transmission / reception state information.

なお、ここでは１つの無線基地局２からの送受信状態情報に基づいて無線端末装置１の位置を特定しているが、複数の無線基地局２からの送受信状態情報に基づいて無線端末装置１の位置を特定してもよい。この場合、移動通信交換局３は、複数の無線基地局２から受信した送受信状態情報からそれぞれ端末ＩＤと基地局ＩＤを取得して、同一の端末ＩＤの無線端末装置１から受信した電波が最も強い無線基地局２を各送受信状態情報に含まれるＲＳＳＩに基づいて特定し、この無線基地局２のセル内に無線端末装置１が存在することを示す位置情報を位置データベース４に登録する。あるいは、移動通信交換局３は、同一の端末ＩＤの無線端末装置１から電波を受信した複数の無線基地局２のセルが重なる地点に無線端末装置１が存在するものと判断して、セルが重なる地点に無線端末装置１が存在することを示す位置情報を位置データベース４に登録してもよい。   Here, the position of the wireless terminal device 1 is specified based on the transmission / reception state information from one wireless base station 2, but the wireless terminal device 1's position is determined based on the transmission / reception state information from a plurality of wireless base stations 2. The position may be specified. In this case, the mobile communication switching center 3 acquires the terminal ID and the base station ID from the transmission / reception state information received from the plurality of radio base stations 2, respectively, and the radio wave received from the radio terminal device 1 with the same terminal ID is the most. A strong radio base station 2 is identified based on RSSI included in each transmission / reception state information, and location information indicating that the radio terminal device 1 exists in the cell of the radio base station 2 is registered in the location database 4. Alternatively, the mobile communication switching center 3 determines that the wireless terminal device 1 exists at a point where cells of a plurality of wireless base stations 2 that have received radio waves from the wireless terminal device 1 having the same terminal ID overlap, and the cell is Position information indicating that the wireless terminal device 1 exists at the overlapping point may be registered in the position database 4.

また、移動通信交換局３は、複数の無線基地局２から受信した送受信状態情報に含まれるＲＳＳＩにより、同一の端末ＩＤの無線端末装置１について各無線基地局２で計測された受信電波強度を取得し、この受信電波強度の大小関係から無線端末装置１と各無線基地局２との距離の大小関係を求めることにより、セル内の無線端末装置１の位置をより詳細に検出して、位置情報を位置データベース４に登録してもよい。   Also, the mobile communication switching center 3 uses the RSSI included in the transmission / reception state information received from the plurality of radio base stations 2 to obtain the received radio wave intensity measured at each radio base station 2 for the radio terminal device 1 with the same terminal ID. The position of the radio terminal device 1 in the cell is detected in more detail by obtaining the magnitude relationship of the distance between the radio terminal device 1 and each radio base station 2 from the magnitude relationship of the received radio wave intensity. Information may be registered in the position database 4.

また、無線端末装置１が自装置の位置（緯度、経度）を検出するＧＰＳ（Global Positioning System ）を備えている場合には、無線端末装置１から無線基地局２に対して位置情報を送信してもよい。この場合、無線基地局２が無線端末装置１から受信した位置情報を含む送受信状態情報を移動通信交換局３に送信することにより、移動通信交換局３が受信した位置情報を位置データベース４に登録する。   In addition, when the wireless terminal device 1 includes a GPS (Global Positioning System) that detects the position (latitude, longitude) of the device itself, the wireless terminal device 1 transmits position information to the wireless base station 2. May be. In this case, the radio base station 2 registers the position information received by the mobile communication switching center 3 in the position database 4 by transmitting the transmission / reception state information including the position information received from the radio terminal device 1 to the mobile communication switching center 3. To do.

また、各無線基地局２がそれぞれ送受信方向の異なる複数の指向性アンテナ２０を備え、無線基地局２から見た無線端末装置１の方向を割り出すようにしてもよい。この場合、無線基地局２は、無線端末装置１の方向情報を含む送受信状態情報を移動通信交換局３に送信する。移動通信交換局３は、１つ又は複数の無線基地局２から受信した送受信状態情報に含まれる方向情報からセル内の無線端末装置１の位置をより詳細に検出して、無線端末装置１の位置情報を位置データベース４に登録する。   In addition, each radio base station 2 may be provided with a plurality of directional antennas 20 having different transmission / reception directions, and the direction of the radio terminal device 1 viewed from the radio base station 2 may be determined. In this case, the radio base station 2 transmits transmission / reception state information including direction information of the radio terminal device 1 to the mobile communication switching center 3. The mobile communication switching center 3 detects the position of the wireless terminal device 1 in the cell in more detail from the direction information included in the transmission / reception state information received from one or a plurality of wireless base stations 2, and The position information is registered in the position database 4.

次に、統計処理装置５の統計処理部５０は、移動通信交換局３から送受信状態情報を受信し、この送受信状態情報に含まれる端末ＩＤに対応する無線端末装置１の位置情報を位置データベース４から取得して、送受信状態情報のＲＳＳＩが表す受信電波強度と無線端末装置１の位置とを単位時間（例えば１分）で平均化する。統計処理部５０は、このような受信電波強度の平均化と位置の平均化を端末ＩＤ毎およびセル毎（無線基地局毎）に行う。   Next, the statistical processing unit 50 of the statistical processing device 5 receives the transmission / reception state information from the mobile communication switching center 3, and stores the position information of the wireless terminal device 1 corresponding to the terminal ID included in the transmission / reception state information in the position database 4. The received radio wave intensity represented by the RSSI of the transmission / reception state information and the position of the wireless terminal device 1 are averaged in unit time (for example, 1 minute). The statistical processing unit 50 performs such reception radio wave intensity averaging and position averaging for each terminal ID and each cell (for each radio base station).

そして、統計処理部５０は、無線端末装置毎の平均受信電波強度と平均位置に基づいて、本システムの通信可能エリア（少なくとも１つの無線基地局２から電波が届く地域、すなわち無線端末装置１が携帯電話機の場合は通信サービス提供が可能な地域）内の受信電波強度を等高線で表した受信電波強度分布をセル毎に作成する。   Then, based on the average received radio wave intensity and the average position for each radio terminal device, the statistical processing unit 50 communicates with the communication area of this system (the area where radio waves reach from at least one radio base station 2, that is, the radio terminal device 1 In the case of a cellular phone, a reception radio wave intensity distribution in which the received radio wave intensity within a region where a communication service can be provided is represented by contour lines is created for each cell.

統計処理装置５の記憶部５１は、統計処理部５０が作成した受信電波強度分布を記憶する。図４に記憶部５１に記憶された時刻Ｔ１の受信電波強度分布Ｅ（Ｔ１）の１例を示す。図４において、同心円状の等高線の上に記載された１，１／４，１／９，１／１６，１／３２の各数値は、ある受信電波強度を１として各受信電波強度を正規化した値である。なお、図４の例では、１つの無線基地局２のセル内について同心円状の受信電波強度分布を示しているが、実際の受信電波強度分布は同心円状とは限らないことは言うまでもない。   The storage unit 51 of the statistical processing device 5 stores the received radio wave intensity distribution created by the statistical processing unit 50. FIG. 4 shows an example of the received radio wave intensity distribution E (T1) at time T1 stored in the storage unit 51. In FIG. 4, the numerical values of 1, 1/4, 1/9, 1/16, and 1/32 written on the concentric contour lines are normalized with each received radio wave intensity being set to 1. It is the value. In the example of FIG. 4, a concentric received radio wave intensity distribution is shown in the cell of one radio base station 2, but it goes without saying that the actual received radio wave intensity distribution is not necessarily concentric.

次に、統計処理装置５の判定部５２は、統計処理部５０が作成した現時刻Ｔ２の受信電波強度分布Ｅ（Ｔ２）と記憶部５１に記憶された１単位時間前の受信電波強度分布Ｅ（Ｔ１）とを同一のセル毎に演算処理して、受信電波強度の変位分布Ｅ（Ｔ２）／（Ｔ１）をセル毎に作成する。図５に現時刻Ｔ２の受信電波強度分布Ｅ（Ｔ２）の１例を示す。受信電波強度Ｅ（Ｔ２）とＥ（Ｔ１）とを演算処理（本実施の形態ではＥ（Ｔ２）とＥ（Ｔ１）との比を求める除算処理）した結果得られる変位分布Ｅ（Ｔ２）／（Ｔ１）は図６のようになる。図６の例では、無線基地局２のセル内において受信電波強度が１／２に変位したことを示している。   Next, the determination unit 52 of the statistical processing device 5 receives the received radio wave intensity distribution E (T2) at the current time T2 created by the statistical processing unit 50 and the received radio wave intensity distribution E one unit time before stored in the storage unit 51. (T1) is calculated for each cell, and a displacement distribution E (T2) / (T1) of received radio wave intensity is created for each cell. FIG. 5 shows an example of the received radio wave intensity distribution E (T2) at the current time T2. Displacement distribution E (T2) / obtained as a result of arithmetic processing (in this embodiment, division processing for obtaining the ratio of E (T2) and E (T1)) of received radio wave intensity E (T2) and E (T1) (T1) is as shown in FIG. In the example of FIG. 6, it is shown that the received radio wave intensity is displaced by half in the cell of the radio base station 2.

続いて、判定部５２は、受信電波強度の変位分布Ｅ（Ｔ２）／（Ｔ１）と所定のしきい値とを比較することにより、通信可能エリア内の通信障害の分布を推定する。すなわち、判定部５２は、通信可能エリア内の各位置における受信電波強度の時間軸上の変位としきい値との比較を単位時間毎および位置毎に行い、受信電波強度の変位が負で、かつ変位の絶対値がしきい値より大きい地点が存在する場合、この地点に通信障害が発生していると推定する。このような推定により、判定部５２は、通信障害の有無を示す分布を作成する。通信障害の原因としては、雲、雨、霧、雷、あられ、雹、煙、光化学スモッグ、建築物、妨害電波などのうち少なくとも１つが考えられる。   Subsequently, the determination unit 52 estimates the distribution of communication failures in the communicable area by comparing the received radio field intensity displacement distribution E (T2) / (T1) with a predetermined threshold value. That is, the determination unit 52 compares the displacement of the received radio wave intensity on the time axis at each position in the communicable area with the threshold value for each unit time and for each position, and the displacement of the received radio wave intensity is negative. If there is a point where the absolute value of the displacement is greater than the threshold value, it is estimated that a communication failure has occurred at this point. Based on such estimation, the determination unit 52 creates a distribution indicating the presence or absence of a communication failure. Possible causes of communication failure include at least one of clouds, rain, fog, lightning, hail, hail, smoke, photochemical smog, buildings, jamming waves, and the like.

以上のように、本実施の形態では、無線端末装置毎の送受信状態情報と位置情報とに基づいて受信電波強度分布を作成し、現時点の受信電波強度分布と過去の受信電波強度分布とから受信電波強度の変位分布を作成して、この変位分布をしきい値と比較することにより、広い通信可能エリアにわたって通信障害分布を作成することができる。このような通信障害分布を作成することができれば、通信障害の復旧対策や通信障害の回避に役立てることができる。また、本実施の形態では、移動通信システムの無線端末装置１と無線基地局２と移動通信交換局３を利用することができるので、新規に設置する装置を減らして、システム規模の増大を抑えることができる。   As described above, in this embodiment, a received radio wave intensity distribution is created based on transmission / reception state information and position information for each wireless terminal device, and received from the current received radio wave intensity distribution and the past received radio wave intensity distribution. By creating a displacement distribution of radio wave intensity and comparing this displacement distribution with a threshold value, a communication failure distribution can be created over a wide communicable area. If such a communication failure distribution can be created, it can be used for communication failure recovery measures and communication failure avoidance. Moreover, in this Embodiment, since the radio | wireless terminal apparatus 1, the radio base station 2, and the mobile communication switching center 3 of a mobile communication system can be utilized, the apparatus newly installed is reduced and the increase in a system scale is suppressed. be able to.

なお、本実施の形態では、受信電波強度の変位分布を求める演算処理で過去の受信電波強度分布として１単位時間前の受信電波強度分布を用いたが、過去の受信電波強度分布の平均値を用いてもよい。   In the present embodiment, the received radio wave intensity distribution of one unit time ago is used as the past received radio wave intensity distribution in the calculation process for obtaining the received radio wave intensity displacement distribution, but the average value of the past received radio wave intensity distributions is used. It may be used.

また、本実施の形態では、受信電波強度の変位分布を求める演算処理として受信電波強度分布の比を求める除算処理を用いているが、現時刻の受信電波強度分布と過去の受信電波強度分布との差を変位分布とする減算処理を用いてもよい。   Further, in the present embodiment, division processing for obtaining the ratio of the received radio wave intensity distribution is used as the calculation process for obtaining the displacement distribution of the received radio wave intensity, but the received radio wave intensity distribution at the current time and the past received radio wave intensity distribution are Subtraction processing using the difference between the two as a displacement distribution may be used.

また、本実施の形態では、主として１つの無線基地局２からの送受信状態情報に基づいて受信電波強度分布を作成する例を説明しているが、他の無線基地局２についても同様に無線基地局毎（セル毎）に受信電波強度分布を作成すればよい。図７にセル毎に作成した受信電波強度分布の１例を示す。図７の例では、各無線基地局２−Ａ，２−Ｂ，２−Ｃのセル毎に受信電波強度分布ＥＡ（Ｔ１），ＥＢ（Ｔ１），ＥＣ（Ｔ１）が作成されている。各セルの受信電波強度分布ＥＡ（Ｔ１），ＥＢ（Ｔ１），ＥＣ（Ｔ１）は、それぞれ中心の無線基地局２−Ａ，２−Ｂ，２−Ｃから見た受信電波強度分布となる。   In the present embodiment, an example in which a received radio wave intensity distribution is created mainly based on transmission / reception state information from one radio base station 2 has been described. The received radio wave intensity distribution may be created for each station (each cell). FIG. 7 shows an example of the received radio wave intensity distribution created for each cell. In the example of FIG. 7, received radio wave intensity distributions EA (T1), EB (T1), and EC (T1) are created for each cell of each of the radio base stations 2-A, 2-B, and 2-C. The received radio wave intensity distributions EA (T1), EB (T1), and EC (T1) of each cell are the received radio wave intensity distributions viewed from the central radio base stations 2-A, 2-B, and 2-C, respectively.

また、受信電波強度は自局のセルに属する無線端末装置１についてのみ計測されるものではなく、各無線基地局２は、他局のセルに属する無線端末装置１についても受信電波強度を計測して、この無線端末装置１の送受信状態情報を移動通信交換局３に送信するようにしてもよい。例えば、図８に示すような状況では、無線端末装置１からの電波を無線基地局２−Ａと２−Ｂで受信することができる。   In addition, the received radio wave intensity is not measured only for the radio terminal apparatus 1 belonging to the cell of its own station, and each radio base station 2 measures the received radio wave intensity of the radio terminal apparatus 1 belonging to the cell of another station. Then, the transmission / reception status information of the wireless terminal device 1 may be transmitted to the mobile communication switching center 3. For example, in the situation shown in FIG. 8, radio waves from the wireless terminal device 1 can be received by the wireless base stations 2-A and 2-B.

［第２の実施の形態］
第１の実施の形態によれば、例えばセル単位あるいはセル内の特定の位置で局所的に発生した通信障害を検出することができるが、より広範囲かつ広帯域に発生する通信障害もある。このような通信障害の原因としては、地殻や地盤の変動に起因する電磁波がある。この電磁波の発生は、地震の前兆現象の可能性がある。本実施の形態では、このような電磁波の発生を検出する。本実施の形態においても、無線情報収集システムとしての構成は第１の実施の形態と同様であるので、図１〜図３の符号を用いて本実施の形態の動作を説明する。 [Second Embodiment]
According to the first embodiment, for example, a communication failure that occurs locally in a cell unit or at a specific position in a cell can be detected, but there is also a communication failure that occurs in a wider range and in a wider band. As a cause of such a communication failure, there is an electromagnetic wave caused by a change in the crust or the ground. The generation of this electromagnetic wave may be a precursor of an earthquake. In the present embodiment, the generation of such an electromagnetic wave is detected. Also in the present embodiment, since the configuration as the wireless information collecting system is the same as that of the first embodiment, the operation of the present embodiment will be described using the reference numerals of FIGS.

前述のように、地震の前兆現象としてパルス状の広帯域電磁雑音が広い地域にわたって発生することがある。このような広帯域電磁雑音が発生したときに、無線基地局２で無線端末装置１からの受信電波強度を観測したとすると、無線端末装置１からの電波には図９に示すように受信信号ＲＳの他に広帯域電磁雑音Ｎが重畳している。   As described above, pulsed broadband electromagnetic noise may occur over a wide area as a precursor of an earthquake. If the radio base station 2 observes the received radio wave intensity from the radio terminal device 1 when such broadband electromagnetic noise occurs, the radio signal from the radio terminal device 1 receives the received signal RS as shown in FIG. In addition, broadband electromagnetic noise N is superimposed.

一方、広帯域電磁雑音Ｎの強度が大きい場合、広帯域電磁雑音Ｎの発生地域の近くに無線端末装置１が存在する場合、あるいは無線端末装置１が無線基地局２から離れている場合は、図１０に示すように受信信号ＲＳと広帯域電磁雑音Ｎとの強度差が小さくなり、受信信号ＲＳが広帯域電磁雑音Ｎに埋もれる。このような場合、受信信号ＲＳを復調できない可能性がある。本実施の形態では、このような復調の可否を検出して、広帯域電磁雑音を検出する。   On the other hand, when the intensity of the broadband electromagnetic noise N is large, when the wireless terminal device 1 exists near the area where the broadband electromagnetic noise N is generated, or when the wireless terminal device 1 is away from the wireless base station 2, FIG. As shown in FIG. 3, the difference in intensity between the received signal RS and the broadband electromagnetic noise N is reduced, and the received signal RS is buried in the broadband electromagnetic noise N. In such a case, there is a possibility that the received signal RS cannot be demodulated. In this embodiment, whether or not such demodulation is possible is detected to detect broadband electromagnetic noise.

第１の実施の形態と同様に、無線基地局２の電波状態取得部２３は、受信部２１が受信した無線端末装置１からの電波の強度を計測する。そして、電波状態取得部２３は、計測した受信電波強度を表すＲＳＳＩと自局の基地局ＩＤと無線端末装置１の端末ＩＤとを含む送受信状態情報を移動通信交換局３に送信する。通信情報と送受信状態情報とを多重化して１つの通信回線により移動通信交換局３に送信してもよい。   Similarly to the first embodiment, the radio wave state acquisition unit 23 of the radio base station 2 measures the intensity of radio waves from the radio terminal device 1 received by the reception unit 21. Then, the radio wave state acquisition unit 23 transmits transmission / reception state information including RSSI indicating the measured received radio wave intensity, the base station ID of the local station, and the terminal ID of the wireless terminal device 1 to the mobile communication switching center 3. The communication information and the transmission / reception status information may be multiplexed and transmitted to the mobile communication switching center 3 through one communication line.

第１の実施の形態と同様に、移動通信交換局３は、位置データベース４に登録された無線端末装置１の位置情報を一定時間毎に更新すると共に、無線基地局２から受信した送受信状態情報を統計処理装置５に送信する。   Similar to the first embodiment, the mobile communication switching center 3 updates the position information of the wireless terminal device 1 registered in the position database 4 at regular intervals, and transmits / receives transmission / reception state information received from the wireless base station 2. Is transmitted to the statistical processing device 5.

第１の実施の形態と同様に、統計処理装置５の統計処理部５０は、移動通信交換局３から送受信状態情報を受信し、この送受信状態情報に含まれる端末ＩＤに対応する無線端末装置１の位置情報を位置データベース４から取得して、送受信状態情報のＲＳＳＩが表す受信電波強度の平均化と無線端末装置１の位置の平均化を端末ＩＤ毎およびセル毎に行う。そして、統計処理部５０は、無線端末装置毎の平均受信電波強度と平均位置に基づいて、通信可能エリア内の受信電波強度分布をセル毎に作成する。   Similar to the first embodiment, the statistical processing unit 50 of the statistical processing device 5 receives the transmission / reception state information from the mobile communication switching center 3, and the wireless terminal device 1 corresponding to the terminal ID included in the transmission / reception state information. Is obtained from the position database 4 and the received radio wave intensity represented by the RSSI of the transmission / reception state information and the position of the wireless terminal device 1 are averaged for each terminal ID and each cell. Then, the statistical processing unit 50 creates a received radio wave intensity distribution in the communicable area for each cell based on the average received radio wave intensity and the average position for each wireless terminal device.

統計処理装置５の記憶部５１は、受信電波強度分布を記憶する。次に、統計処理装置５の判定部５２は、統計処理部５０が作成した現時刻Ｔ２の受信電波強度分布Ｅ（Ｔ２）と記憶部５１に記憶された１単位時間前の受信電波強度分布Ｅ（Ｔ１）とを同一のセル毎に演算処理して、受信電波強度の変位分布Ｅ（Ｔ２）／（Ｔ１）をセル毎に作成する。このときの演算処理は、受信電波強度分布の比を求める除算処理でもよいし、受信電波強度分布の差を求める減算処理でもよい。   The storage unit 51 of the statistical processing device 5 stores the received radio wave intensity distribution. Next, the determination unit 52 of the statistical processing device 5 receives the received radio wave intensity distribution E (T2) at the current time T2 created by the statistical processing unit 50 and the received radio wave intensity distribution E one unit time before stored in the storage unit 51. (T1) is calculated for each cell, and a displacement distribution E (T2) / (T1) of received radio wave intensity is created for each cell. The calculation process at this time may be a division process for obtaining a ratio of received radio wave intensity distributions or a subtraction process for obtaining a difference of received radio wave intensity distributions.

続いて、判定部５２は、受信電波強度の変位分布Ｅ（Ｔ２）／（Ｔ１）と所定のしきい値とを比較することにより、広帯域電磁雑音を検出する。すなわち、判定部５２は、通信可能エリア内の各位置における受信電波強度の時間軸上の変位としきい値との比較を単位時間毎および位置毎に行い、受信電波強度の変位が負で、かつ変位の絶対値がしきい値より大きい状態が所定の時間継続している地点が存在する場合、この地点に広帯域電磁雑音が発生していると推定する。このような推定により、判定部５２は、広帯域電磁雑音の有無を示す分布を作成する。前述のように、広帯域電磁雑音の発生原因としては、地殻や地盤の変動が考えられる。   Subsequently, the determination unit 52 detects broadband electromagnetic noise by comparing the displacement distribution E (T2) / (T1) of the received radio wave intensity with a predetermined threshold value. That is, the determination unit 52 compares the displacement of the received radio wave intensity on the time axis at each position in the communicable area with the threshold value for each unit time and for each position, and the displacement of the received radio wave intensity is negative. If there is a point where a state where the absolute value of the displacement is greater than the threshold value continues for a predetermined time, it is estimated that broadband electromagnetic noise is generated at this point. Based on such estimation, the determination unit 52 creates a distribution indicating the presence or absence of broadband electromagnetic noise. As described above, the cause of the generation of broadband electromagnetic noise is considered to be fluctuations in the crust and ground.

以上のように、本実施の形態では、無線端末装置毎の送受信状態情報と位置情報とに基づいて受信電波強度分布を作成し、現時点の受信電波強度分布と過去の受信電波強度分布とから受信電波強度の変位分布を作成して、この変位分布をしきい値と比較することにより、広範囲かつ広帯域に発生する広帯域電磁雑音を検出することができる。広帯域電磁雑音を検出することができれば、広帯域電磁雑音の発生情報を地震の予知情報として活用することができる。また、本実施の形態では、移動通信システムの無線端末装置１と無線基地局２と移動通信交換局３を利用することができるので、新規に設置する装置を減らして、システム規模の増大を抑えることができる。   As described above, in this embodiment, a received radio wave intensity distribution is created based on transmission / reception state information and position information for each wireless terminal device, and received from the current received radio wave intensity distribution and the past received radio wave intensity distribution. By creating a displacement distribution of radio wave intensity and comparing this displacement distribution with a threshold value, it is possible to detect broadband electromagnetic noise generated in a wide range and in a wide band. If broadband electromagnetic noise can be detected, information on the generation of broadband electromagnetic noise can be used as earthquake prediction information. Moreover, in this Embodiment, since the radio | wireless terminal apparatus 1, the radio base station 2, and the mobile communication switching center 3 of a mobile communication system can be utilized, the apparatus newly installed is reduced and the increase in a system scale is suppressed. be able to.

なお、本実施の形態では、受信電波強度の変位分布を求める演算処理で過去の受信電波強度分布として１単位時間前の受信電波強度分布を用いたが、過去の受信電波強度分布の平均値を用いてもよい。   In the present embodiment, the received radio wave intensity distribution of one unit time ago is used as the past received radio wave intensity distribution in the calculation process for obtaining the received radio wave intensity displacement distribution, but the average value of the past received radio wave intensity distributions is used. It may be used.

また、本実施の形態では、主として１つの無線基地局２からの送受信状態情報に基づいて受信電波強度分布を作成する例を説明しているが、他の無線基地局２についても同様に無線基地局毎（セル毎）に受信電波強度分布を作成すればよい。また、受信電波強度は自局のセルに属する無線端末装置１についてのみ計測されるものではなく、各無線基地局２は、他局のセルに属する無線端末装置１についても受信電波強度を計測して、この無線端末装置１の送受信状態情報を移動通信交換局３に送信するようにしてもよい。   In the present embodiment, an example in which a received radio wave intensity distribution is created mainly based on transmission / reception state information from one radio base station 2 has been described. The received radio wave intensity distribution may be created for each station (each cell). In addition, the received radio wave intensity is not measured only for the radio terminal apparatus 1 belonging to the cell of its own station, and each radio base station 2 measures the received radio wave intensity of the radio terminal apparatus 1 belonging to the cell of another station. Then, the transmission / reception status information of the wireless terminal device 1 may be transmitted to the mobile communication switching center 3.

［第３の実施の形態］
第２の実施の形態では、受信電波強度分布を用いて広帯域電磁雑音を検出したが、通信可能エリアにおける復調不可地点を示す復調不可地点分布を用いて広帯域電磁雑音を検出するようにしてもよい。本実施の形態においても、無線情報収集システムとしての構成は第１の実施の形態と同様であるので、図１〜図３の符号を用いて本実施の形態の動作を説明する。 [Third Embodiment]
In the second embodiment, the broadband electromagnetic noise is detected using the received radio wave intensity distribution. However, the broadband electromagnetic noise may be detected using a non-demodulable point distribution indicating a non-demodulable point in the communicable area. . Also in the present embodiment, since the configuration as the wireless information collecting system is the same as that of the first embodiment, the operation of the present embodiment will be described using the reference numerals of FIGS.

本実施の形態の無線基地局２の電波状態取得部２３は、計測した受信電波強度を表すＲＳＳＩと、自局の基地局ＩＤと、無線端末装置１の端末ＩＤと、無線端末装置１から受信した電波の復調可否を示す復調可否情報とを含む送受信状態情報を移動通信交換局３に送信する。移動通信交換局３の動作は第１の実施の形態と同じである。   The radio wave state acquisition unit 23 of the radio base station 2 according to the present embodiment receives the RSSI representing the measured received radio wave intensity, the base station ID of the own station, the terminal ID of the radio terminal device 1, and the radio terminal device 1. The transmission / reception state information including the demodulation propriety information indicating whether the radio wave is demodulated is transmitted to the mobile communication switching center 3. The operation of the mobile switching center 3 is the same as that in the first embodiment.

第１の実施の形態と同様に、統計処理装置５の統計処理部５０は、移動通信交換局３から送受信状態情報を受信し、この送受信状態情報に含まれる端末ＩＤに対応する無線端末装置１の位置情報を位置データベース４から取得して、送受信状態情報のＲＳＳＩが表す受信電波強度の平均化と無線端末装置１の位置の平均化を端末ＩＤ毎およびセル毎に行う。そして、統計処理部５０は、無線端末装置毎の平均受信電波強度と平均位置に基づいて、通信可能エリア内の受信電波強度分布をセル毎に作成する。   Similar to the first embodiment, the statistical processing unit 50 of the statistical processing device 5 receives the transmission / reception state information from the mobile communication switching center 3, and the wireless terminal device 1 corresponding to the terminal ID included in the transmission / reception state information. Is obtained from the position database 4 and the received radio wave intensity represented by the RSSI of the transmission / reception state information and the position of the wireless terminal device 1 are averaged for each terminal ID and each cell. Then, the statistical processing unit 50 creates a received radio wave intensity distribution in the communicable area for each cell based on the average received radio wave intensity and the average position for each wireless terminal device.

統計処理装置５の記憶部５１は、受信電波強度分布を記憶する。図１１に記憶部５１に記憶された時刻Ｔ１の受信電波強度分布Ｅ（Ｔ１）の１例を示す。
続いて、統計処理装置５の統計処理部５０は、記憶部５１に記憶された受信電波強度分布Ｅ（Ｔ１）と送受信状態情報に含まれる復調可否情報に基づいて、通信可能エリアにおける復調不可地点を示す復調不可地点分布Ｆ（Ｔ１）をセル毎に作成する。すなわち、統計処理部５０は、受信電波強度分布Ｅ（Ｔ１）において、復調可否情報が復調不可を示す無線端末装置１の受信電波強度だけを残すことにより、復調不可地点分布Ｆ（Ｔ１）を作成する。 The storage unit 51 of the statistical processing device 5 stores the received radio wave intensity distribution. FIG. 11 shows an example of the received radio wave intensity distribution E (T1) at time T1 stored in the storage unit 51.
Subsequently, the statistical processing unit 50 of the statistical processing device 5 is based on the received radio wave intensity distribution E (T1) stored in the storage unit 51 and the demodulation propriety information included in the transmission / reception state information. A non-demodulable point distribution F (T1) indicating is generated for each cell. That is, the statistical processing unit 50 creates the non-demodulable point distribution F (T1) by leaving only the received radio wave intensity of the wireless terminal device 1 whose demodulation availability information indicates that demodulation is impossible in the received radio wave intensity distribution E (T1). To do.

図１２に復調不可地点分布Ｆ（Ｔ１）の１例を示す。図１２の例では、無線端末装置１−ａ，１−ｂ，１−ｃ，１−ｄからの電波が復調不可となっため、無線端末装置１−ａ，１−ｂ，１−ｃ，１−ｄからの受信電波強度だけを残すことにより、復調不可地点分布Ｆ（Ｔ１）が作成される。   FIG. 12 shows an example of the non-demodulable point distribution F (T1). In the example of FIG. 12, since radio waves from the radio terminal devices 1-a, 1-b, 1-c, 1-d cannot be demodulated, the radio terminal devices 1-a, 1-b, 1-c, 1 By leaving only the received radio wave intensity from -d, a non-demodulable point distribution F (T1) is created.

次に、判定部５２は、復調不可地点分布Ｆ（Ｔ１）と所定のしきい値とを比較することにより、広帯域電磁雑音を検出する。すなわち、判定部５２は、復調不可地点の総面積が所定のしきい値より大きい場合、この復調不可地点に広帯域電磁雑音が発生していると判定する。このような判定により、判定部５２は、広帯域電磁雑音の有無を示す分布を作成する。   Next, the determination unit 52 detects wideband electromagnetic noise by comparing the non-demodulable spot distribution F (T1) with a predetermined threshold value. That is, the determination unit 52 determines that broadband electromagnetic noise is generated at the non-demodulable point when the total area of the non-demodulable point is larger than a predetermined threshold. Based on such determination, the determination unit 52 creates a distribution indicating the presence or absence of broadband electromagnetic noise.

以上のように、本実施の形態では、無線端末装置毎の送受信状態情報と位置情報と復調可否情報に基づいて復調不可地点分布を作成し、この復調不可地点分布をしきい値と比較することにより、局所的に発生する妨害電波と広範囲に発生する広帯域電磁雑音とを区別することができ、第２の実施の形態と同様の効果を得ることができる。   As described above, in the present embodiment, a non-demodulable spot distribution is created based on transmission / reception state information, position information, and demodulator availability information for each wireless terminal device, and this non-demodulable spot distribution is compared with a threshold value. Thus, it is possible to distinguish between locally disturbing radio waves and wide-band electromagnetic noises generated in a wide range, and the same effect as in the second embodiment can be obtained.

なお、第３の実施の形態において、統計処理装置５の判定部５２は、統計処理部５０が作成した現時刻の復調不可地点分布と記憶部５１に記憶された過去の復調不可地点分布とを同一のセル毎に演算処理して、復調不可地点の変位分布をセル毎に作成してもよい。このときの演算処理は、復調不可地点分布の差を求める減算処理でよい。この場合、判定部５２は、復調不可地点の変位分布の総面積が所定のしきい値より大きい場合、この復調不可地点に広帯域電磁雑音が発生していると判定する。   In the third embodiment, the determination unit 52 of the statistical processing device 5 uses the current non-demodulable point distribution created by the statistical processing unit 50 and the past non-demodulable point distribution stored in the storage unit 51. It is also possible to perform a calculation process for each same cell and create a displacement distribution of the points that cannot be demodulated for each cell. The calculation process at this time may be a subtraction process for obtaining a difference between the non-demodulable point distributions. In this case, when the total area of the displacement distribution of the non-demodulable point is larger than a predetermined threshold, the determining unit 52 determines that broadband electromagnetic noise is generated at the non-demodulable point.

また、判定部５２は、復調不可地点の総面積又は復調不可地点の変位分布の総面積が所定のしきい値より大きく、かつ復調不可地点内に存在する無線端末装置１の台数を復調不可地点の所定の面積又は復調不可地点の変位分布の所定の面積で割った無線端末装置の密度が所定の台数しきい値より大きい場合に、復調不可地点に広帯域電磁雑音が発生していると判定してもよい。このように台数しきい値を導入することにより、復調不可地点内に存在する無線端末装置１の台数が少ない場合、すなわち検出の確度が低い場合を除外することができ、広帯域電磁雑音の検出の確度を向上させることができる。   Further, the determination unit 52 determines whether the total area of the non-demodulable points or the total area of the displacement distribution of the non-demodulable points is larger than a predetermined threshold, If the density of the wireless terminal device divided by the predetermined area of the predetermined area or the predetermined area of the displacement distribution of the non-demodulable point is larger than the predetermined number threshold, it is determined that broadband electromagnetic noise is generated at the non-demodulable point. May be. By introducing the number threshold in this way, it is possible to exclude the case where the number of the wireless terminal devices 1 existing in the non-demodulable point is small, that is, the case where the detection accuracy is low. Accuracy can be improved.

また、第２、第３の実施の形態において、無線端末装置１と無線基地局２との通信を複数の無線周波数を用いて行い、無線端末装置毎の送受信状態情報を複数の無線周波数について求めるようにしてもよい。このとき、無線端末装置１からの電波には図１３に示すように複数の無線周波数の受信信号ＲＳが含まれる。そして、無線周波数毎の送受信状態情報を用いて復調不可地点分布を作成すれば、広帯域電磁雑音の検出精度を向上させることができる。   In the second and third embodiments, communication between the radio terminal device 1 and the radio base station 2 is performed using a plurality of radio frequencies, and transmission / reception status information for each radio terminal device is obtained for the plurality of radio frequencies. You may do it. At this time, the radio waves from the wireless terminal device 1 include reception signals RS of a plurality of radio frequencies as shown in FIG. If the non-demodulable point distribution is created using the transmission / reception state information for each radio frequency, the detection accuracy of the broadband electromagnetic noise can be improved.

また、第１〜第３の実施の形態では、送受信状態情報を受信電波強度と復調可否情報を含むものとしているが、送受信状態情報として電波到達時間差、ビット誤り率、Ｓ／Ｎ比を用いるようにしてもよい。
また、第１〜第３の実施の形態では、無線端末装置１の例として携帯電話機を例に挙げて説明したが、これに限るものではなく、無線端末装置１として所望の期間、位置が固定された端末装置を使用してもよい。 In the first to third embodiments, the transmission / reception state information includes the received radio wave intensity and the demodulation availability information. However, the radio wave arrival time difference, the bit error rate, and the S / N ratio are used as the transmission / reception state information. It may be.
In the first to third embodiments, a mobile phone has been described as an example of the wireless terminal device 1. However, the present invention is not limited to this, and a desired period and position are fixed as the wireless terminal device 1. You may use the terminal device made.

本発明は、無線情報収集システムに適用することができる。   The present invention can be applied to a wireless information collection system.

本発明の第１の実施の形態となる無線情報収集システムの構成を示すブロック図である。It is a block diagram which shows the structure of the radio | wireless information collection system used as the 1st Embodiment of this invention. 本発明の第１の実施の形態における無線基地局の構成例を示すブロック図である。It is a block diagram which shows the structural example of the radio base station in the 1st Embodiment of this invention. 本発明の第１の実施の形態における統計処理装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the statistical processing apparatus in the 1st Embodiment of this invention. 本発明の第１の実施の形態における統計処理装置の記憶部に記憶された受信電波強度分布の１例を示す図である。It is a figure which shows one example of the received radio wave intensity distribution memorize | stored in the memory | storage part of the statistical processing apparatus in the 1st Embodiment of this invention. 本発明の第１の実施の形態における統計処理装置の統計処理部が作成した現時刻の受信電波強度分布の１例を示す図である。It is a figure which shows an example of the received radio wave intensity distribution of the present time which the statistical processing part of the statistical processing apparatus in the 1st Embodiment of this invention produced. 本発明の第１の実施の形態における受信電波強度の変位分布の１例を示す図である。It is a figure which shows one example of the displacement distribution of the received radio wave intensity | strength in the 1st Embodiment of this invention. 本発明の第１の実施の形態においてセル毎に作成した受信電波強度分布の１例を示す図である。It is a figure which shows one example of the received radio wave intensity distribution produced for every cell in the 1st Embodiment of this invention. 無線端末装置からの電波を複数の無線基地局で受信する場合の動作を説明するための図である。It is a figure for demonstrating operation | movement in the case of receiving the electromagnetic wave from a radio | wireless terminal apparatus in several radio base stations. 広帯域電磁雑音が発生したときの無線基地局における受信電波強度の周波数特性の１例を示す図である。It is a figure which shows an example of the frequency characteristic of the received radio wave intensity in a wireless base station when a broadband electromagnetic noise generate | occur | produces. 広帯域電磁雑音が発生したときの無線基地局における受信電波強度の周波数特性の他の例を示す図である。It is a figure which shows the other example of the frequency characteristic of the received radio wave intensity in a wireless base station when broadband electromagnetic noise generate | occur | produces. 本発明の第３の実施の形態における統計処理装置の記憶部に記憶された受信電波強度分布の１例を示す図である。It is a figure which shows an example of the received radio wave intensity distribution memorize | stored in the memory | storage part of the statistical processing apparatus in the 3rd Embodiment of this invention. 本発明の第３の実施の形態における統計処理装置の判定部が作成した復調不可地点分布の１例を示す図である。It is a figure which shows an example of the non-demodulable spot distribution which the determination part of the statistical processing apparatus in the 3rd Embodiment of this invention produced. 複数の無線周波数を用いる場合の無線基地局における受信電波強度の周波数特性の１例を示す図である。It is a figure which shows one example of the frequency characteristic of the received radio wave intensity in the radio base station in the case of using a plurality of radio frequencies.

符号の説明Explanation of symbols

１…無線端末装置、２…無線基地局、３…移動通信交換局、４…位置データベース、５…統計処理装置、６…公衆網、７…セル、２０…アンテナ、２１…受信部、２２…送信部、２３…電波状態取得部、５０…統計処理部、５１…記憶部、５２…判定部。   DESCRIPTION OF SYMBOLS 1 ... Wireless terminal device, 2 ... Wireless base station, 3 ... Mobile communication switching center, 4 ... Location database, 5 ... Statistical processing device, 6 ... Public network, 7 ... Cell, 20 ... Antenna, 21 ... Reception part, 22 ... Transmission unit, 23 ... Radio wave state acquisition unit, 50 ... Statistical processing unit, 51 ... Storage unit, 52 ... Determination unit.

Claims (9)

複数の無線端末装置と、
前記無線端末装置と通信し、前記無線端末装置との間の送受信状態を示す送受信状態情報を無線端末装置毎に取得する無線基地局と、
各無線端末装置の位置情報を取得する位置情報取得手段と、
前記無線基地局が取得した無線端末装置毎の送受信状態情報と前記位置情報取得手段が取得した無線端末装置毎の位置情報とに基づいて、前記無線端末装置と前記無線基地局とが通信可能なエリアにおける通信障害の二次元的配置を示す通信障害分布を作成する分布作成手段とを有し、
前記分布作成手段は、
前記無線端末装置毎の送受信状態情報と位置情報とから、前記通信可能エリアにおける前記送受信状態の状況を示す送受信状態分布を作成する統計処理部と、
前記送受信状態分布に基づいて前記通信障害分布を作成する判定部とを備え、
前記送受信状態情報は、前記無線端末装置から受信した電波の復調可否情報を含み、
前記統計処理部は、前記送受信状態分布として前記通信可能エリアにおける復調不可地点を示す復調不可地点分布を作成し、
前記判定部は、前記復調不可地点の総面積が所定のしきい値より大きい場合、この復調不可地点に広帯域電磁雑音が発生していると判定し、この広帯域電磁雑音の有無を示す分布を前記通信障害分布として作成することを特徴とする無線情報収集システム。 A plurality of wireless terminal devices;
A wireless base station that communicates with the wireless terminal device and acquires transmission / reception state information indicating a transmission / reception state with the wireless terminal device for each wireless terminal device;
Position information acquisition means for acquiring position information of each wireless terminal device;
Based on the transmission / reception state information for each wireless terminal apparatus acquired by the wireless base station and the position information for each wireless terminal apparatus acquired by the position information acquisition unit, the wireless terminal apparatus and the wireless base station can communicate with each other. It possesses a distribution creation means for creating a communication failure distribution indicating a two-dimensional arrangement of the communication failure in the area,
The distribution creating means includes
A statistical processing unit that creates a transmission / reception state distribution indicating the state of the transmission / reception state in the communicable area from the transmission / reception state information and position information for each wireless terminal device;
A determination unit that creates the communication failure distribution based on the transmission / reception state distribution;
The transmission / reception state information includes radio wave demodulation propriety information received from the wireless terminal device,
The statistical processing unit creates a non-demodulable point distribution indicating non-demodulable points in the communicable area as the transmission / reception state distribution,
When the total area of the non-demodulable points is larger than a predetermined threshold, the determination unit determines that wide-band electromagnetic noise is generated at the non-demodulable points, and distributes the distribution indicating presence / absence of the wide-band electromagnetic noises. A wireless information collection system created as a communication failure distribution . 請求項１記載の無線情報収集システムにおいて、
前記判定部は、前記復調不可地点の総面積が所定のしきい値より大きく、かつ前記復調不可地点内に存在する無線端末装置の台数を前記復調不可地点の所定の面積で割った無線端末装置の密度が所定の台数しきい値より大きい場合に、広帯域電磁雑音が発生していると判定することを特徴とする無線情報収集システム。 The wireless information collection system according to claim 1,
The determination unit is a wireless terminal device in which the total area of the non-demodulable points is larger than a predetermined threshold value and the number of wireless terminal devices existing in the non-demodulable points is divided by the predetermined area of the non-demodulable points A wireless information collecting system , wherein when the density of the signal is larger than a predetermined number threshold, it is determined that broadband electromagnetic noise is generated . 複数の無線端末装置と、
前記無線端末装置と通信し、前記無線端末装置との間の送受信状態を示す送受信状態情報を無線端末装置毎に取得する無線基地局と、
各無線端末装置の位置情報を取得する位置情報取得手段と、
前記無線基地局が取得した無線端末装置毎の送受信状態情報と前記位置情報取得手段が取得した無線端末装置毎の位置情報とに基づいて、前記無線端末装置と前記無線基地局とが通信可能なエリアにおける通信障害の二次元的配置を示す通信障害分布を作成する分布作成手段とを有し、
前記分布作成手段は、
前記無線端末装置毎の送受信状態情報と位置情報とから、前記通信可能エリアにおける前記送受信状態の状況を示す送受信状態分布を作成する統計処理部と、
前記送受信状態分布を記憶する記憶部と、
前記統計処理部が作成した現時点の送受信状態分布と前記記憶部に記憶された過去の送受信状態分布とから、前記通信可能エリアにおける前記送受信状態の変位を示す変位分布を作成し、この変位分布に基づいて前記通信障害分布を作成する判定部とを備え、
前記送受信状態情報は、前記無線端末装置から受信した電波の復調可否情報を含み、
前記統計処理部は、前記送受信状態分布として前記通信可能エリアにおける復調不可地点を示す復調不可地点分布を作成し、
前記判定部は、前記統計処理部が作成した現時点の復調不可地点分布と前記記憶部に記憶された過去の復調不可地点分布とから、前記通信可能エリアにおける復調不可地点の変位分布を作成し、前記復調不可地点の変位分布の総面積が所定のしきい値より大きい場合、この復調不可地点に広帯域電磁雑音が発生していると判定し、この広帯域電磁雑音の有無を示す分布を前記通信障害分布として作成することを特徴とする無線情報収集システム。 A plurality of wireless terminal devices;
A wireless base station that communicates with the wireless terminal device and acquires transmission / reception state information indicating a transmission / reception state with the wireless terminal device for each wireless terminal device;
Position information acquisition means for acquiring position information of each wireless terminal device;
Based on the transmission / reception state information for each wireless terminal apparatus acquired by the wireless base station and the position information for each wireless terminal apparatus acquired by the position information acquisition unit, the wireless terminal apparatus and the wireless base station can communicate with each other. A distribution creating means for creating a communication failure distribution indicating a two-dimensional arrangement of communication failures in the area;
The distribution creating means includes
A statistical processing unit that creates a transmission / reception state distribution indicating the state of the transmission / reception state in the communicable area from the transmission / reception state information and position information for each wireless terminal device;
A storage unit for storing the transmission / reception state distribution;
A displacement distribution indicating the displacement of the transmission / reception state in the communicable area is created from the current transmission / reception state distribution created by the statistical processing unit and the past transmission / reception state distribution stored in the storage unit, and the displacement distribution is And a determination unit that creates the communication failure distribution based on
The transmission / reception state information includes radio wave demodulation propriety information received from the wireless terminal device,
The statistical processing unit creates a non-demodulable point distribution indicating non-demodulable points in the communicable area as the transmission / reception state distribution,
The determination unit creates a displacement distribution of non-demodulable points in the communicable area from the current non-demodulable point distribution created by the statistical processing unit and the past non-demodulable point distribution stored in the storage unit, When the total area of the displacement distribution of the non-demodulable point is larger than a predetermined threshold, it is determined that broadband electromagnetic noise is generated at the non-demodulable point, and the distribution indicating the presence or absence of the broadband electromagnetic noise is determined as the communication failure. A wireless information collection system characterized by being created as a distribution . 請求項３記載の無線情報収集システムにおいて、
前記判定部は、前記復調不可地点の変位分布の総面積が所定のしきい値より大きく、かつ前記復調不可地点内に存在する無線端末装置の台数を前記復調不可地点の変位分布の所定の面積で割った無線端末装置の密度が所定の台数しきい値より大きい場合に、広帯域電磁雑音が発生していると判定することを特徴とする無線情報収集システム。 The wireless information collection system according to claim 3 ,
The determination unit is configured such that a total area of the displacement distribution at the non-demodulable point is larger than a predetermined threshold and the number of wireless terminal devices existing in the non-demodulable point is a predetermined area of the displacement distribution at the non-demodulable point. A wireless information collecting system , wherein when the density of wireless terminal devices divided by 1 is larger than a predetermined number threshold, it is determined that broadband electromagnetic noise is generated . 複数の無線端末装置と、
前記無線端末装置と通信し、前記無線端末装置との間の送受信状態を示す送受信状態情報を無線端末装置毎に取得する無線基地局と、
各無線端末装置の位置情報を取得する位置情報取得手段と、
前記無線基地局が取得した無線端末装置毎の送受信状態情報と前記位置情報取得手段が取得した無線端末装置毎の位置情報とに基づいて、前記無線端末装置と前記無線基地局とが通信可能なエリアにおける通信障害の二次元的配置を示す通信障害分布を作成する分布作成手段とを有し、
前記分布作成手段は、
前記無線端末装置毎の送受信状態情報と位置情報とから、前記通信可能エリアにおける前記送受信状態の状況を示す送受信状態分布を作成する統計処理部と、
前記送受信状態分布を記憶する記憶部と、
前記統計処理部が作成した現時点の送受信状態分布と前記記憶部に記憶された過去の送受信状態分布とから、前記通信可能エリアにおける前記送受信状態の変位を示す変位分布を作成し、この変位分布に基づいて前記通信障害分布を作成する判定部とを備え、
前記送受信状態情報は、受信電波強度の情報を含み、
前記統計処理部は、前記送受信状態分布として受信電波強度分布を作成し、
前記判定部は、前記統計処理部が作成した現時点の受信電波強度分布と前記記憶部に記憶された過去の受信電波強度分布とから、前記通信可能エリアにおける受信電波強度の変位分布を作成し、前記受信電波強度の変位が負で、かつ変位の絶対値が所定のしきい値より大きい状態が所定の時間継続している地点が存在する場合、この地点に広帯域電磁雑音が発生していると判定し、この広帯域電磁雑音の有無を示す分布を前記通信障害分布として作成することを特徴とする無線情報収集システム。 A plurality of wireless terminal devices;
A wireless base station that communicates with the wireless terminal device and acquires transmission / reception state information indicating a transmission / reception state with the wireless terminal device for each wireless terminal device;
Position information acquisition means for acquiring position information of each wireless terminal device;
Based on the transmission / reception state information for each wireless terminal apparatus acquired by the wireless base station and the position information for each wireless terminal apparatus acquired by the position information acquisition unit, the wireless terminal apparatus and the wireless base station can communicate with each other. A distribution creating means for creating a communication failure distribution indicating a two-dimensional arrangement of communication failures in the area;
The distribution creating means includes
A statistical processing unit that creates a transmission / reception state distribution indicating the state of the transmission / reception state in the communicable area from the transmission / reception state information and position information for each wireless terminal device;
A storage unit for storing the transmission / reception state distribution;
A displacement distribution indicating the displacement of the transmission / reception state in the communicable area is created from the current transmission / reception state distribution created by the statistical processing unit and the past transmission / reception state distribution stored in the storage unit, and the displacement distribution is And a determination unit that creates the communication failure distribution based on
The transmission / reception state information includes information on received radio wave intensity,
The statistical processing unit creates a received radio wave intensity distribution as the transmission / reception state distribution,
The determination unit creates a displacement distribution of the received radio wave intensity in the communicable area from the current received radio wave intensity distribution created by the statistical processing unit and the past received radio wave intensity distribution stored in the storage unit, When there is a point where the displacement of the received radio wave intensity is negative and the state where the absolute value of the displacement is greater than a predetermined threshold continues for a predetermined time, broadband electromagnetic noise is generated at this point. A wireless information collection system that determines and creates a distribution indicating the presence or absence of the broadband electromagnetic noise as the communication failure distribution . 請求項１乃至５のいずれか１項に記載の無線情報収集システムにおいて、
前記位置情報取得手段は、前記無線端末装置と少なくとも１つの前記無線基地局との通信により前記無線端末装置の位置を特定して、前記位置情報を取得することを特徴とする無線情報収集システム。 In the radio | wireless information collection system of any one of Claims 1 thru | or 5 ,
The position information acquisition unit specifies the position of the wireless terminal device through communication between the wireless terminal device and at least one of the wireless base stations, and acquires the position information . 請求項１乃至５のいずれか１項に記載の無線情報収集システムにおいて、
前記位置情報取得手段は、前記無線端末装置から送信された前記位置情報を前記無線基地局を介して取得することを特徴とする無線情報収集システム。 In the radio | wireless information collection system of any one of Claims 1 thru | or 5 ,
The position information acquisition unit acquires the position information transmitted from the wireless terminal device via the wireless base station . 請求項１乃至７のいずれか１項に記載の無線情報収集システムにおいて、
前記無線基地局は、前記送受信状態情報を複数の無線周波数について求めることを特徴とする無線情報収集システム。 In the radio | wireless information collection system of any one of Claims 1 thru | or 7 ,
The radio base station obtains the transmission / reception state information for a plurality of radio frequencies . 請求項１乃至８のいずれか１項に記載の無線情報収集システムにおいて、
前記無線基地局は、前記通信可能エリア内に複数配置され、
前記分布作成手段は、前記通信障害分布を無線基地局毎に作成することを特徴とする無線情報収集システム。 In the radio | wireless information collection system of any one of Claims 1 thru | or 8 ,
A plurality of the radio base stations are arranged in the communicable area,
The distribution creation means creates the communication failure distribution for each radio base station .
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