JP5072407B2

JP5072407B2 - COMMUNICATION CONTROL METHOD, COMMUNICATION SYSTEM AND COMMUNICATION CONTROL DEVICE

Info

Publication number: JP5072407B2
Application number: JP2007089102A
Authority: JP
Inventors: 智春山崎; 空悟守田
Original assignee: Kyocera Corp
Current assignee: Kyocera Corp
Priority date: 2007-03-29
Filing date: 2007-03-29
Publication date: 2012-11-14
Anticipated expiration: 2027-03-29
Also published as: JP2008252334A

Description

本発明は、通信制御方法、通信システムおよび通信制御装置に関するものである。 The present invention relates to a communication control method, a communication system, and a communication control apparatus.

従来、移動体通信システムとして、セルラーシステムが知られており、また、最近では、例えば、ＷｉＭＡＸ(Worldwide Interoperability for Microwave Access)などの高速無線通信の規格化も進められている。 Conventionally, a cellular system is known as a mobile communication system, and recently, standardization of high-speed wireless communication such as WiMAX (Worldwide Interoperability for Microwave Access) has been promoted.

セルラーシステムにおいては、隣接する無線基地局で異なる周波数帯域を用いることにより、隣接する無線基地局からの電波が干渉しないようにしている。このため、セルラーシステムでは、異なる複数の周波数帯域を使用して、無線通信網を構築している。 In a cellular system, radio waves from adjacent radio base stations are prevented from interfering with each other by using different frequency bands in adjacent radio base stations. For this reason, in the cellular system, a wireless communication network is constructed using a plurality of different frequency bands.

これに対し、ＷｉＭＡＸにおいては、同一周波数上で、上りおよび下りを時間分割して送受信するＴＤＤ(Time Division Duplexing)を採用している。このため、ＷｉＭＡＸでは、無線基地局間におけるフレーム構造を同期させることにより、他の端末からの送信波が、他の無線基地局と通信している端末の、無線基地局送信波の干渉波とならないようにしている。 On the other hand, WiMAX employs TDD (Time Division Duplexing) in which uplink and downlink are time-divided and transmitted / received on the same frequency. For this reason, in WiMAX, by synchronizing the frame structure between the radio base stations, the transmission wave from the other terminal becomes the interference wave of the radio base station transmission wave of the terminal communicating with the other radio base station. I try not to be.

しかしながら、ＷｉＭＡＸのような広帯域の周波数を使用する無線通信システムでは、有限な周波数の有効利用の観点から、セルラーシステムのように、隣接する無線基地局に異なる周波数帯域を割り当てることは困難になることが想定される。このため、隣接する無線基地局間において同一周波数帯域を用いると、無線基地局間がフレーム同期していることから、隣接する無線基地局間に通信干渉領域が生じることになる。 However, in a wireless communication system using a wideband frequency such as WiMAX, it is difficult to assign different frequency bands to adjacent wireless base stations as in a cellular system from the viewpoint of effective use of a finite frequency. Is assumed. For this reason, when the same frequency band is used between adjacent radio base stations, the radio base stations are frame-synchronized, so that a communication interference region is generated between adjacent radio base stations.

このように、通信干渉領域が生じると、この領域に存在する端末は、隣接する無線基地局からの送信波を同時に受信することになるため、それぞれの受信強度が同程度となる領域では、各々の送信波を分離することが困難となって、隣接する無線基地局にハンドオーバできず、不通状態になることが懸念される。 As described above, when a communication interference area occurs, terminals existing in this area receive transmission waves from adjacent radio base stations at the same time. It is difficult to separate the transmitted waves, and there is a concern that the radio waves cannot be handed over to an adjacent radio base station and become disconnected.

なお、干渉による不感領域を低減するものとして、複数の無線基地局アンテナにアダプティブアレーを適用して、複数の無線基地局の方向にヌルを形成するようにしたものが提案されている（例えば、特許文献１参照）。
特開平１１−３０８０３７号公報 In order to reduce the insensitive area due to interference, an adaptive array is applied to a plurality of radio base station antennas to form nulls in the direction of the plurality of radio base stations (for example, Patent Document 1).
JP-A-11-308037

しかし、上記特許文献１に開示のものは、複数の無線基地局から同時送信した電波を端末で合成して伝送品質を高める複局同時送受信のサイトダイバーシチ方式に関するもので、端末が一つの無線基地局と通信するシステムには適用できない。 However, the one disclosed in Patent Document 1 relates to a site diversity system for simultaneous transmission / reception of multiple stations that combines radio waves transmitted simultaneously from a plurality of radio base stations at a terminal to improve transmission quality. Not applicable to systems communicating with stations.

したがって、かかる事情に鑑みてなされた本発明の目的は、隣接する無線基地局に干渉されることなく、安定して通信できる通信制御方法、通信システムおよび通信制御装置を提供することにある。 Therefore, an object of the present invention made in view of such circumstances is to provide a communication control method, a communication system, and a communication control apparatus capable of stably communicating without being interfered by adjacent radio base stations.

上記目的を達成する請求項１に係る通信制御方法の発明は、アダプティブアレイアンテナを備えた複数の無線基地局を通信制御装置により制御する通信システムにおける通信制御方法であって、
前記複数の無線基地局のうち、互いに隣接する第１無線基地局および第２無線基地局による干渉領域を示す位置情報と、前記干渉領域に前記第１無線基地局がビームを向けるための第１重み係数と、前記干渉領域に前記第２無線基地局がビームを向けるための第２重み係数と、を対応させて干渉テーブルに記憶する記憶ステップと、
前記第１無線基地局が無線通信装置と通信中に、前記第１無線基地局および前記第２無線基地局がそれぞれ適用している重み係数を取得して、これら取得した重み係数と前記干渉テーブルに記憶されている前記第１重み係数および前記第２重み係数との比較に基づいて、前記無線通信装置が前記第２無線基地局との干渉領域に位置するか否かを判定するステップと、
その結果、前記無線通信装置が干渉領域に位置する場合には、前記無線通信装置に対して、前記第２無線基地局の送信波が干渉しないように、当該第２無線基地局におけるビーム生成を制御するステップと、を含み、
前記記憶ステップは、
前記第１無線基地局と無線接続された無線通信装置に要求される通信品質に関する情報を取得するステップと、
前記取得した通信品質に関する情報に基づいて、前記無線通信装置に要求される通信品質が所定の品質を満たすか否かを判断する判断ステップと、
前記判断の結果、前記通信品質が所定の品質を満たさない場合に、当該無線通信装置を干渉領域確認対象装置として、該干渉領域確認対象装置から取得した位置情報に基づいて、前記第２無線基地局のビームを前記干渉領域確認対象装置に向けるための第２重み係数を算出する第２重み係数算出ステップと、
前記算出された第２重み係数に基づいて、前記第２無線基地局がビームを生成した後、前記第１無線基地局が前記干渉領域確認対象装置からの信号を取得したか否かを把握する信号取得把握ステップと、を含み、
前記把握の結果、前記第１無線基地局が前記干渉領域確認対象装置からの信号を取得していない場合に、前記干渉領域確認対象装置は、前記第１無線基地局と前記第２無線基地局との干渉領域に位置するとして、前記第１無線基地局が前記干渉領域確認対象装置にビームを向けるのに使用している前記第１重み係数と、前記第２重み係数算出ステップで算出した第２重み係数と、前記干渉領域確認対象装置から取得した位置情報とを対応させて干渉テーブルに記憶する、
ことを特徴とするものである。 An invention of a communication control method according to claim 1 for achieving the above object is a communication control method in a communication system in which a plurality of radio base stations equipped with an adaptive array antenna are controlled by a communication control device,
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area and weighting factors, a storing step of the second radio base station to the interference region to store a second weighting factor for directing the beam, the interference table in association with,
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. a step of, based on a comparison between the first weighting factor is stored and the second weighting factor, the wireless communication device to determine whether located in the interference region between the second radio base station,
As a result, when the radio communication device is located in an interference area, beam generation in the second radio base station is performed so that the transmission wave of the second radio base station does not interfere with the radio communication device. Controlling , and
The storing step includes
Obtaining information on communication quality required for a wireless communication device wirelessly connected to the first wireless base station;
A determination step of determining whether or not a communication quality required for the wireless communication device satisfies a predetermined quality based on the acquired information on the communication quality;
As a result of the determination, when the communication quality does not satisfy a predetermined quality, the second radio base station is set as the interference area confirmation target apparatus based on the position information acquired from the interference area confirmation target apparatus. A second weighting factor calculating step for calculating a second weighting factor for directing a station beam to the interference area confirmation target device;
Based on the calculated second weighting factor, it is determined whether the first radio base station has acquired a signal from the interference area confirmation target device after the second radio base station has generated a beam. A signal acquisition grasping step,
As a result of the grasping, when the first radio base station has not acquired a signal from the interference area confirmation target apparatus, the interference area confirmation target apparatus includes the first radio base station and the second radio base station. The first weighting factor used by the first radio base station to direct the beam toward the interference region confirmation target apparatus and the second weighting factor calculating step. 2 corresponding to the weighting factor and the position information acquired from the interference area confirmation target device, and stored in the interference table,
It is characterized by this.

さらに、上記目的を達成する請求項２に係る通信制御方法の発明は、アダプティブアレイアンテナを備えた複数の無線基地局を通信制御装置により制御する通信システムにおける通信制御方法であって、
前記複数の無線基地局のうち、互いに隣接する第１無線基地局および第２無線基地局による干渉領域を示す位置情報と、前記干渉領域に前記第１無線基地局がビームを向けるための第１重み係数と、前記干渉領域に前記第２無線基地局がビームを向けるための第２重み係数と、を対応させて干渉テーブルに記憶する記憶ステップと、
前記第１無線基地局が無線通信装置と通信中に、前記第１無線基地局および前記第２無線基地局がそれぞれ適用している重み係数を取得して、これら取得した重み係数と前記干渉テーブルに記憶されている前記第１重み係数および前記第２重み係数との比較に基づいて、前記無線通信装置が前記第２無線基地局との干渉領域に位置するか否かを判定するステップと、
その結果、前記無線通信装置が干渉領域に位置する場合には、前記無線通信装置に対して、前記第２無線基地局の送信波が干渉しないように、当該第２無線基地局におけるビーム生成を制御するステップと、を含み、
前記記憶ステップは、
前記第１無線基地局と無線接続された無線通信装置から取得した位置情報が、前記干渉テーブルに記憶されているか否かを判定するステップと、
前記判定の結果、前記無線通信装置から取得した位置情報が、前記干渉テーブルに記憶されていない場合に、前記無線通信装置に要求される通信品質に関する情報を取得するステップと、
前記取得した通信品質に関する情報に基づいて、前記無線通信装置に要求される通信品質が所定の品質を満たすか否かを判断する判断ステップと、
前記判断の結果、前記通信品質が所定の品質を満たさない場合に、当該無線通信装置を干渉領域確認対象装置として、該干渉領域確認対象装置から取得した位置情報に基づいて、前記第２無線基地局のビームを前記干渉領域確認対象装置に向けるための第２重み係数を算出する第２重み係数算出ステップと、
前記算出された第２重み係数に基づいて、前記第２無線基地局がビームを生成した後、前記第１無線基地局が前記干渉領域確認対象装置からの信号を取得したか否かを把握する信号取得把握ステップと、を含み、
前記把握の結果、前記第１無線基地局が前記干渉領域確認対象装置からの信号を取得していない場合に、前記干渉領域確認対象装置は、前記第１無線基地局と前記第２無線基地局との干渉領域に位置するとして、前記第１無線基地局が前記干渉領域確認対象装置にビームを向けるのに使用している前記第１重み係数と、前記第２重み係数算出ステップで算出した第２重み係数と、前記干渉領域確認対象装置から取得した位置情報とを対応させて干渉テーブルに記憶する、ことを特徴とするものである。 Furthermore, the invention of the communication control method according to claim 2 that achieves the above object is a communication control method in a communication system in which a plurality of radio base stations including an adaptive array antenna are controlled by a communication control device,
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area Storing a weighting factor in association with a second weighting factor for directing the beam to the interference area in the interference table;
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. Determining whether the radio communication device is located in an interference area with the second radio base station based on a comparison between the first weight coefficient and the second weight coefficient stored in
As a result, when the radio communication device is located in an interference area, beam generation in the second radio base station is performed so that the transmission wave of the second radio base station does not interfere with the radio communication device. Controlling, and
The storing step includes
Determining whether position information acquired from a wireless communication device wirelessly connected to the first wireless base station is stored in the interference table;
As a result of the determination, when position information acquired from the wireless communication device is not stored in the interference table, obtaining information related to communication quality required for the wireless communication device;
A determination step of determining whether or not a communication quality required for the wireless communication device satisfies a predetermined quality based on the acquired information on the communication quality;
As a result of the determination, when the communication quality does not satisfy a predetermined quality, the second radio base station is set as the interference area confirmation target apparatus based on the position information acquired from the interference area confirmation target apparatus. A second weighting factor calculating step for calculating a second weighting factor for directing a station beam to the interference area confirmation target device;
Based on the calculated second weighting factor, it is determined whether the first radio base station has acquired a signal from the interference area confirmation target device after the second radio base station has generated a beam. A signal acquisition grasping step,
As a result of the grasping, when the first radio base station has not acquired a signal from the interference area confirmation target apparatus, the interference area confirmation target apparatus includes the first radio base station and the second radio base station. The first weighting factor used by the first radio base station to direct the beam toward the interference region confirmation target apparatus and the second weighting factor calculating step. The two weighting factors are associated with the position information acquired from the interference area confirmation target device and stored in the interference table.

請求項３に係る発明は、請求項１または２に記載の通信制御方法において、
前記干渉領域確認対象装置に対して、通信品質に対応した帯域を確保するとともに、干渉領域確認のための帯域を割り当てることを特徴とするものである。 The invention according to claim 3 is the communication control method according to claim 1 or 2 ,
A band corresponding to communication quality is allocated to the interference area confirmation target device, and a band for interference area confirmation is allocated.

さらに、上記目的を達成する請求項４に係る通信システムの発明は、アダプティブアレイアンテナを備えた複数の無線基地局と、当該複数の無線基地局を制御する通信制御装置とを含む通信システムであって、
前記複数の無線基地局の各々は、
ビーム生成に適用している重み係数を前記通信制御装置へ送信するとともに、前記通信制御装置からの重み係数を受信する通信制御装置通信手段を有し、
前記通信制御装置は、
前記各無線基地局から送信された前記重み係数を受信する受信手段と、
前記複数の無線基地局のうち、互いに隣接する第１無線基地局および第２無線基地局による干渉領域を示す位置情報と、前記干渉領域に前記第１無線基地局がビームを向けるための第１重み係数と、前記干渉領域に前記第２無線基地局がビームを向けるための第２重み係数と、を対応して記憶する干渉テーブルと、
前記第１無線基地局が無線通信装置と通信中に、前記第１無線基地局および前記第２無線基地局がそれぞれ適用している重み係数を取得して、これら取得した重み係数と前記干渉テーブルに記憶されている前記第１重み係数および前記第２重み係数との比較に基づいて、前記無線通信装置が前記第２無線基地局との干渉領域に位置するか否かを判定する干渉領域判定手段と、
前記干渉領域判定手段により、前記無線通信装置が前記干渉領域に位置すると判定された場合に、前記受信手段で受信した前記第１無線基地局の重み係数に基づいて、前記無線通信装置に対して、前記第２無線基地局の送信波が干渉しないように、当該第２無線基地局のビーム生成を制御するための第３重み係数を算出する重み係数算出手段と、
前記算出された第３重み係数を前記第２無線基地局へ送信する送信手段と、を有し、
前記干渉テーブルに記憶される前記位置情報は、前記第１無線基地局と無線接続された無線通信装置に要求される通信品質が所定の品質を満たさない場合に、当該無線通信装置を干渉領域確認対象装置として、該干渉領域確認対象装置から取得される位置情報であり、
前記干渉テーブルに記憶される前記第２重み係数は、前記干渉領域確認対象装置から取得される位置情報に基づいて、前記第２無線基地局のビームを前記干渉領域確認対象装置に向けるための重み係数であり、
前記干渉テーブルに記憶される前記第１重み係数は、前記第２重み係数に基づいて前記第２無線基地局がビームを生成し、前記第１無線基地局が前記干渉領域確認対象装置からの信号を取得していない場合に、前記第１無線基地局が前記干渉領域確認対象装置にビームを向けるのに使用している重み係数であり、
前記通信制御装置から送信された前記第３重み係数に基づいて、前記第２無線基地局におけるビーム生成を制御するように構成したことを特徴とするものである。 Furthermore, an invention of a communication system according to claim 4 that achieves the above object is a communication system that includes a plurality of radio base stations including an adaptive array antenna and a communication control device that controls the plurality of radio base stations. And
Each of the plurality of radio base stations
A communication control device communication means for transmitting a weighting factor applied to beam generation to the communication control device and receiving a weighting factor from the communication control device;
The communication control device includes:
Receiving means for receiving the weighting factor transmitted from each radio base station;
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area An interference table that stores a weighting factor and a second weighting factor for causing the second radio base station to direct the beam to the interference area;
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. An interference area determination that determines whether or not the wireless communication device is located in an interference area with the second radio base station based on a comparison between the first weight coefficient and the second weight coefficient stored in Means,
When the interference area determination means determines that the wireless communication apparatus is located in the interference area, based on the weighting factor of the first wireless base station received by the reception means, the wireless communication apparatus Weight coefficient calculation means for calculating a third weight coefficient for controlling beam generation of the second radio base station so that the transmission waves of the second radio base station do not interfere with each other;
Transmitting means for transmitting the calculated third weighting coefficient to the second radio base station,
The location information stored in the interference table indicates that the wireless communication device is in an interference area confirmation when the communication quality required for the wireless communication device wirelessly connected to the first wireless base station does not satisfy a predetermined quality. Position information acquired from the interference area confirmation target device as the target device,
The second weight coefficient stored in the interference table is a weight for directing the beam of the second radio base station to the interference area confirmation target device based on position information acquired from the interference area confirmation target device. Coefficient,
The first weighting factor stored in the interference table is a signal generated by the second radio base station based on the second weighting factor, and the first radio base station receives a signal from the interference area confirmation target device. Is a weighting factor used by the first radio base station to direct the beam to the interference area confirmation target device,
The beam generation in the second radio base station is controlled based on the third weighting factor transmitted from the communication control device.

さらに、上記目的を達成する請求項５に係る通信制御装置の発明は、アダプティブアレイアンテナを備えた複数の無線基地局を制御する通信制御装置であって、
前記複数の無線基地局の各々から、ビーム生成に適用している重み係数を取得する重み係数取得手段と、
前記複数の無線基地局のうち、互いに隣接する第１無線基地局および第２無線基地局による干渉領域を示す位置情報と、前記干渉領域に前記第１無線基地局がビームを向けるための第１重み係数と、前記干渉領域に前記第２無線基地局がビームを向けるための第２重み係数と、を対応して記憶する干渉テーブルと、
前記第１無線基地局が無線通信装置と通信中に、前記第１無線基地局および前記第２無線基地局がそれぞれ適用している重み係数を取得して、これら取得した重み係数と前記干渉テーブルに記憶されている前記第１重み係数および前記第２重み係数との比較に基づいて、前記無線通信装置が前記第２無線基地局との干渉領域に位置するか否かを判定する干渉領域判定手段と、
前記干渉領域判定手段により、前記無線通信装置が前記干渉領域に位置すると判定された場合に、前記重み係数取得手段で取得した前記第１無線基地局の重み係数に基づいて、前記無線通信装置に対して、前記第２無線基地局の送信波が干渉しないように、当該第２無線基地局のビーム生成を制御するための第３重み係数を算出する重み係数算出手段と、
前記算出された第３重み係数を前記第２無線基地局へ送信する送信手段と、を備え、
前記干渉テーブルに記憶される前記位置情報は、前記第１無線基地局と無線接続された無線通信装置に要求される通信品質が所定の品質を満たさない場合に、当該無線通信装置を干渉領域確認対象装置として、該干渉領域確認対象装置から取得される位置情報であり、
前記干渉テーブルに記憶される前記第２重み係数は、前記干渉領域確認対象装置から取得される位置情報に基づいて、前記第２無線基地局のビームを前記干渉領域確認対象装置に向けるための重み係数であり、
前記干渉テーブルに記憶される前記第１重み係数は、前記第２重み係数に基づいて前記第２無線基地局がビームを生成し、前記第１無線基地局が前記干渉領域確認対象装置からの信号を取得していない場合に、前記第１無線基地局が前記干渉領域確認対象装置にビームを向けるのに使用している重み係数である、
ことを特徴とするものである。
Further, the invention of a communication control apparatus according to claim 5 to achieve the above object, there is provided a communication control apparatus which controls a plurality of radio base stations having adaptive array antennas,
Weight coefficient acquisition means for acquiring a weight coefficient applied to beam generation from each of the plurality of radio base stations;
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area An interference table that stores a weighting factor and a second weighting factor for causing the second radio base station to direct the beam to the interference area;
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. An interference area determination that determines whether or not the wireless communication device is located in an interference area with the second radio base station based on a comparison between the first weight coefficient and the second weight coefficient stored in Means,
When the interference area determination means determines that the wireless communication apparatus is located in the interference area, the interference area determination means determines whether the wireless communication apparatus is based on the weight coefficient of the first radio base station acquired by the weight coefficient acquisition means. On the other hand, weight coefficient calculation means for calculating a third weight coefficient for controlling beam generation of the second radio base station so that the transmission waves of the second radio base station do not interfere with each other,
Transmitting means for transmitting the calculated third weighting coefficient to the second radio base station,
The location information stored in the interference table indicates that the wireless communication device is in an interference area confirmation when the communication quality required for the wireless communication device wirelessly connected to the first wireless base station does not satisfy a predetermined quality. Position information acquired from the interference area confirmation target device as the target device,
The second weight coefficient stored in the interference table is a weight for directing the beam of the second radio base station to the interference area confirmation target device based on position information acquired from the interference area confirmation target device. Coefficient,
The first weighting factor stored in the interference table is a signal generated by the second radio base station based on the second weighting factor, and the first radio base station receives a signal from the interference area confirmation target device. Is a weighting factor used by the first radio base station to direct a beam toward the interference area confirmation target device,
It is characterized by this.

本発明によれば、互いに隣接する第１無線基地局および第２無線基地局による干渉領域を示す位置情報と、この干渉領域に、第１無線基地局がビームを向けるための第１重み係数と、第２無線基地局がビームを向けるための第２重み係数と、を対応させて干渉テーブルに記憶し、第１無線基地局が無線通信装置と通信中に、第１無線基地局および第２無線基地局がそれぞれ適用している重み係数を取得して、干渉テーブルに記憶されている第１重み係数および第２重み係数と比較することにより、無線通信装置が第２無線基地局との干渉領域に位置するか否かを判定し、干渉領域に位置する場合には、無線通信装置に対して、第２無線基地局の送信波が干渉しないように、当該第２無線基地局におけるビーム生成を制御するようにしたので、隣接する無線基地局間に生じる干渉領域を、各々の無線基地局の重み係数と関連させて取得することができ、隣接する無線基地局に干渉されることなく、安定して通信することが可能となる。 According to the present invention, position information indicating an interference area by the first radio base station and the second radio base station adjacent to each other, and a first weighting factor for the first radio base station to direct a beam to the interference area, A second weighting factor for directing the beam by the second radio base station is stored in the interference table in correspondence with the first radio base station and the second radio base station while the first radio base station is communicating with the radio communication device. By acquiring the weighting factor applied by each radio base station and comparing it with the first weighting factor and the second weighting factor stored in the interference table, the radio communication apparatus interferes with the second radio base station. It is determined whether or not it is located in an area, and if it is located in an interference area, beam generation in the second radio base station is performed so that the transmission wave of the second radio base station does not interfere with the radio communication apparatus. So that Interference area generated between adjacent radio base stations can be acquired in association with the weighting factor of each radio base station, and stable communication can be performed without interference from adjacent radio base stations. Become.

以下、本発明の実施の形態について、図を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の一実施の形態に係る通信システムの原理を説明するための図である。図１に示す通信システムは、複数の無線基地局１−１，１−２，・・・と、これらを制御する通信制御装置２とを有している。各無線基地局１−１，１−２，・・・（以下、一つの無線基地局を指す場合には、無線基地局１とも記す）は、同一周波数帯域を使用して、無線基地局間でフレーム同期したＴＤＤにより、当該無線基地局１の通信エリアに存在する端末（無線通信装置）３と無線通信するようになっているとともに、各無線基地局１は、複数のアンテナを有し、通信している端末３に対して、アンテナの指向性を制御してリンク状況を改善するアダプティブアレイアンテナを採用している。また、端末３は、ＧＰＳ等の位置検出機能を有している。 FIG. 1 is a diagram for explaining the principle of a communication system according to an embodiment of the present invention. The communication system shown in FIG. 1 includes a plurality of radio base stations 1-1, 1-2,... And a communication control apparatus 2 that controls these. Each radio base station 1-1, 1-2,... (Hereinafter, also referred to as a radio base station 1 when referring to one radio base station) uses the same frequency band, The wireless base station 1 is configured to wirelessly communicate with a terminal (wireless communication device) 3 existing in the communication area of the wireless base station 1 by TDD synchronized with the frame, and each wireless base station 1 has a plurality of antennas. For the communicating terminal 3, an adaptive array antenna that controls the directivity of the antenna to improve the link status is adopted. The terminal 3 has a position detection function such as GPS.

本実施の形態の通信システムでは、通信制御装置２に、後述するように、干渉テーブルを設け、この干渉テーブルに、互いに隣接する無線基地局１−１および無線基地局１−２による干渉領域を示す位置情報と、該干渉領域に無線基地局１−１がビームを向けるための第１重み係数Ｗ１と、無線基地局１−２がビームを向けるための第２重み係数Ｗ２とを対応して記憶する。 In the communication system according to the present embodiment, the communication control device 2 is provided with an interference table as will be described later, and the interference table is provided with interference areas due to the radio base station 1-1 and the radio base station 1-2 adjacent to each other. Corresponding position information to indicate, the first weighting factor W1 for the radio base station 1-1 to direct the beam to the interference area, and the second weighting factor W2 for the radio base station 1-2 to direct the beam Remember.

また、本実施の形態では、隣接する一方の無線基地局が、干渉領域にビームを向けた際の重み係数（Ｗ１またはＷ２）に基づいて、他方の無線基地局が、干渉領域を避けて、一方の無線基地局の不感領域を補間するビームを生成するための重み係数（第３重み係数）Ｗ３を算出し、この算出した第３重み係数Ｗ３を干渉テーブルに記憶する。 Further, in the present embodiment, based on the weighting factor (W1 or W2) when one adjacent radio base station directs the beam to the interference area, the other radio base station avoids the interference area, A weighting factor (third weighting factor) W3 for generating a beam for interpolating the dead area of one radio base station is calculated, and the calculated third weighting factor W3 is stored in the interference table.

このようにして、例えば、図１（ａ）に示すように、無線基地局１−１が端末３と通信する場合には、無線基地局１−１は、通信中に端末３から位置情報を取得して、通信制御装置２に送信する。また、無線基地局１−１は、端末３からの受信信号に基づいて、その受信強度が最大となる重み係数ｗ１を算出し、その重み係数ｗ１を受信信号に合成するとともに、送信信号に合成するようにして、端末３にビームを向けるようにアンテナの指向性を制御する、すなわち端末３の方向に指向性を有するビームを生成するようにしているので、ここで適用されている実際の重み係数ｗ１を、通信制御装置２に送信する。 Thus, for example, as shown in FIG. 1A, when the radio base station 1-1 communicates with the terminal 3, the radio base station 1-1 receives the position information from the terminal 3 during communication. Obtain and transmit to the communication control device 2. In addition, the radio base station 1-1 calculates a weighting coefficient w1 that maximizes the reception intensity based on the received signal from the terminal 3, combines the weighting coefficient w1 with the received signal, and combines it with the transmission signal. Thus, the directivity of the antenna is controlled so that the beam is directed to the terminal 3, that is, a beam having directivity in the direction of the terminal 3 is generated, so that the actual weight applied here The coefficient w1 is transmitted to the communication control device 2.

通信制御装置２では、無線基地局１−１から取得した通信中の端末３の位置情報に基づいて、干渉テーブルから対応する位置情報の有無を検索する。 In the communication control device 2, the presence / absence of corresponding position information is searched from the interference table based on the position information of the communicating terminal 3 acquired from the radio base station 1-1.

ここで、干渉テーブルから対応する位置情報が検索されれば、端末３は無線基地局１−２との干渉領域に位置している可能性があるので、端末３の位置情報を取得した時点において、無線基地局１−１および無線基地局１−２がそれぞれ実際に適用している重み係数ｗ１およびｗ２を取得し、これら取得した重み係数ｗ１およびｗ２と、干渉テーブルに記憶されている第１重み係数Ｗ１および第２重み係数Ｗ２との比較に基づいて、同じ組み合わせがあるか否かを判断する。 Here, if the corresponding position information is searched from the interference table, the terminal 3 may be located in the interference area with the radio base station 1-2, so at the time when the position information of the terminal 3 is acquired. The wireless base station 1-1 and the wireless base station 1-2 obtain the weighting factors w1 and w2 that are actually applied, respectively, and the obtained weighting factors w1 and w2 and the first stored in the interference table Based on the comparison between the weighting coefficient W1 and the second weighting coefficient W2, it is determined whether or not there is the same combination.

その結果、同じ組み合わせがあれば、端末３は無線基地局１−２との干渉領域に位置していると判定して、この場合には、干渉テーブルから、無線基地局１−１のビームによる不感領域を、無線基地局１−２が補間するビームを生成するため第３重み係数Ｗ３を取得して、無線基地局１−２に送信する。 As a result, if there is the same combination, it is determined that the terminal 3 is located in the interference area with the radio base station 1-2, and in this case, from the interference table, the beam of the radio base station 1-1 is used. A third weighting factor W3 is acquired in order to generate a beam in which the radio base station 1-2 interpolates the dead area, and is transmitted to the radio base station 1-2.

これにより、隣接する無線基地局１−２では、通信制御装置２から受信した第３重み係数Ｗ３に基づいて、無線基地局１−１の不感領域を補うように、ビームを生成して、図１（ａ）に示すように、無線基地局１−１と通信している端末３が、隣接する無線基地局１−２と干渉せず、かつ、無線基地局１−１による不感領域を、無線基地局１−２により補間するようにする。 As a result, the adjacent radio base station 1-2 generates a beam so as to compensate for the dead area of the radio base station 1-1 based on the third weighting coefficient W3 received from the communication control device 2, As shown in 1 (a), the terminal 3 communicating with the radio base station 1-1 does not interfere with the adjacent radio base station 1-2, and the insensitive area by the radio base station 1-1 is Interpolation is performed by the radio base station 1-2.

なお、無線基地局１−１および無線基地局１−２から取得した実際の重み係数ｗ１およびｗ２と、干渉テーブルに記憶されている第１重み係数Ｗ１および第２重み係数Ｗ２とに、同じ組み合わせがなければ、端末３は無線基地局１−２との干渉領域に位置していないと判定して、通信制御装置２による無線基地局１−２のビーム生成制御は行わないようにする。 Note that the actual weighting factors w1 and w2 acquired from the radio base station 1-1 and the radio base station 1-2 and the first weighting factor W1 and the second weighting factor W2 stored in the interference table are the same combination. If not, it is determined that the terminal 3 is not located in the interference area with the radio base station 1-2, and the beam generation control of the radio base station 1-2 by the communication control device 2 is not performed.

一方、無線基地局１−１から取得した通信中の端末３の位置情報が干渉テーブルから検索されなかった場合には、通信制御装置２は、端末３に要求される通信品質が所定の品質を満たすか否かを判断し、所定の品質を満たさない場合には、端末３を干渉領域確認対象端末として、該端末３から取得した位置情報に基づいて、隣接する無線基地局１−２が端末３にビームを向けるための重み係数Ｗ２を算出する。この算出した重み係数Ｗ２は、無線基地局１−２へ送信し、これにより無線基地局１−２において、図１（ｂ）に示すように、端末３に向けるビームを生成させる。 On the other hand, when the position information of the communicating terminal 3 acquired from the radio base station 1-1 is not retrieved from the interference table, the communication control device 2 determines that the communication quality required for the terminal 3 is a predetermined quality. If the predetermined quality is not satisfied, the terminal 3 is set as the interference area confirmation target terminal, and the adjacent radio base station 1-2 is based on the position information acquired from the terminal 3, and the terminal 3 A weighting factor W2 for directing the beam to 3 is calculated. The calculated weighting factor W2 is transmitted to the radio base station 1-2, thereby causing the radio base station 1-2 to generate a beam directed to the terminal 3 as shown in FIG.

その後、通信制御装置２は、無線基地局１−１に対して、端末３からの送信信号が受信できたか否かを問い合わせ、受信できなかった場合には、端末３は、隣接する無線基地局１−２による干渉領域に位置しているとして、無線基地局１−１から取得した重み係数ｗ１を第１重み係数Ｗ１、通信制御装置２で算出した重み係数Ｗ２を第２重み係数Ｗ２として、これら第１重み係数Ｗ１および第２重み係数Ｗ２と、無線基地局１−１から取得した端末３の位置情報とを対応させて干渉テーブルに記憶する。さらに、無線基地局１−１の重み係数ｗ１に基づいて、無線基地局１−２が、干渉領域を避けて、無線基地局１−１の不感領域を補間するビームを生成するための第３重み係数Ｗ３を算出し、この算出した第３重み係数Ｗ３を干渉テーブルに記憶する。 Thereafter, the communication control device 2 inquires of the radio base station 1-1 whether or not the transmission signal from the terminal 3 has been received. 1-2, assuming that the weighting factor w1 acquired from the radio base station 1-1 is the first weighting factor W1, and the weighting factor W2 calculated by the communication control device 2 is the second weighting factor W2. The first weighting factor W1 and the second weighting factor W2 are associated with the location information of the terminal 3 acquired from the radio base station 1-1 and stored in the interference table. Furthermore, based on the weighting factor w1 of the radio base station 1-1, the radio base station 1-2 generates a third beam for interpolating the dead area of the radio base station 1-1 while avoiding the interference area. A weighting factor W3 is calculated, and the calculated third weighting factor W3 is stored in the interference table.

なお、図１では、説明を簡略化するため、端末３と通信している無線基地局１−１の不感領域を、隣接する一つの無線基地局１−２で補間するようにしたが、隣接する複数の無線基地局で補間する場合もある。 In FIG. 1, in order to simplify the description, the insensitive area of the radio base station 1-1 communicating with the terminal 3 is interpolated by one adjacent radio base station 1-2. In some cases, interpolation is performed by a plurality of radio base stations.

図２は、図１に示す通信システムにおける各無線基地局１および通信制御装置２の要部の概略構成を示す機能ブロック図である。各無線基地局１は、同様に構成されており、端末と無線通信する端末通信手段１１と、通信制御装置２と有線または無線により通信する通信制御装置通信手段１２と、全体の動作を制御する制御手段１３とを有している。端末通信手段１１は、通信中の端末からの受信信号に基づいて算出される重み係数ｗ１や、通信制御装置２から受信した重み係数Ｗ２または第３重み係数Ｗ３に基づいて、アンテナの指向性を制御するビーム生成手段１５を有している。 FIG. 2 is a functional block diagram showing a schematic configuration of a main part of each radio base station 1 and communication control apparatus 2 in the communication system shown in FIG. Each wireless base station 1 is configured in the same manner, and controls the overall operation of a terminal communication unit 11 that communicates wirelessly with a terminal, a communication control device communication unit 12 that communicates with the communication control device 2 in a wired or wireless manner. And control means 13. The terminal communication unit 11 determines the antenna directivity based on the weighting factor w1 calculated based on the received signal from the terminal in communication, the weighting factor W2 received from the communication control device 2, or the third weighting factor W3. It has beam generating means 15 to be controlled.

通信制御装置２は、無線基地局１と通信する無線基地局通信手段２１と、隣接無線基地局抽出手段２２と、干渉テーブル２３と、重み係数算出手段２４と、全体を制御する制御手段２５とを有している。 The communication control apparatus 2 includes a radio base station communication unit 21 that communicates with the radio base station 1, an adjacent radio base station extraction unit 22, an interference table 23, a weight coefficient calculation unit 24, and a control unit 25 that controls the whole. have.

以下、図３に示すフローチャートを参照して、本実施の形態の具体的動作について説明する。なお、図３は、干渉テーブル２３の生成処理を示している。 The specific operation of the present embodiment will be described below with reference to the flowchart shown in FIG. FIG. 3 shows the generation process of the interference table 23.

例えば、無線基地局１−１が端末３と通信している場合には、無線基地局１−１は、端末通信手段１１により、端末３から当該端末３が位置している位置情報を取得して、その位置情報を、通信制御装置通信手段１２により通信制御装置２に送信する。また、無線基地局１−１は、端末通信手段１１のビーム生成手段１５がビーム生成に適用する、端末３からの受信信号に基づいて算出した重み係数ｗ１を、通信制御装置通信手段１２により通信制御装置２に送信する。無線基地局１−２を含む他の無線基地局についても、同様に、現在のビーム生成に適用している重み係数を通信制御装置２に送信するとともに、通信中の端末があれば、その位置情報も通信制御装置２に送信する。 For example, when the radio base station 1-1 communicates with the terminal 3, the radio base station 1-1 acquires the position information where the terminal 3 is located from the terminal 3 by the terminal communication unit 11. Then, the position information is transmitted to the communication control device 2 by the communication control device communication means 12. Also, the radio base station 1-1 communicates the weighting factor w1 calculated based on the received signal from the terminal 3 that is applied to the beam generation by the beam generation unit 15 of the terminal communication unit 11 through the communication control device communication unit 12. It transmits to the control apparatus 2. Similarly, for other radio base stations including the radio base station 1-2, the weighting factor applied to the current beam generation is transmitted to the communication control apparatus 2, and if there is a terminal in communication, its position Information is also transmitted to the communication control device 2.

通信制御装置２においては、図３に示すように、先ず、無線基地局通信手段２１を介して、無線基地局１−１から送信される端末３の位置情報を取得するとともに（ステップＳ３１）、無線基地局１−１が端末３に対するビーム生成に適用している第１重み係数ｗ１を取得する（ステップＳ３２）。 In the communication control device 2, as shown in FIG. 3, first, the location information of the terminal 3 transmitted from the radio base station 1-1 is acquired via the radio base station communication means 21 (step S31). The first weighting factor w1 applied to the beam generation for the terminal 3 by the radio base station 1-1 is acquired (step S32).

その後、通信制御装置２は、制御手段２５により、無線基地局１−１から取得した位置情報が干渉テーブル２３に登録済みであるか否かを検索する（ステップＳ３３）。ここで、登録済みであれば、端末３は無線基地局１−２との干渉領域に位置している可能性があるので、上述したように、端末３の位置情報を取得した時点において、無線基地局１−１および無線基地局１−２がそれぞれ実際に適用している重み係数ｗ１およびｗ２を取得して、干渉テーブル２３に同じ組み合わせの第１重み係数Ｗ１および第２重み係数Ｗ２があるかを検索して、端末３が干渉領域に位置するか否かを判定する。 Thereafter, the communication control apparatus 2 searches the control unit 25 to determine whether or not the position information acquired from the radio base station 1-1 has been registered in the interference table 23 (step S33). Here, if registered, since the terminal 3 may be located in an interference area with the radio base station 1-2, as described above, when the position information of the terminal 3 is acquired, the terminal 3 The weighting factors w1 and w2 that are actually applied by the base station 1-1 and the radio base station 1-2 are acquired, and the interference table 23 has the same combination of the first weighting factor W1 and the second weighting factor W2. It is determined whether or not the terminal 3 is located in the interference area.

その結果、端末３が無線基地局１−２との干渉領域に位置していると判定された場合には、干渉テーブル２３から、無線基地局１−１のビームによる不感領域を、無線基地局１−２が補間するビームを生成するため第３重み係数Ｗ３を取得して、無線基地局通信手段２１を介して無線基地局１−２に送信する。これにより、図１（ａ）に示したように、端末３は、隣接する無線基地局１−２の送信波に干渉されず、かつ、無線基地局１−１による不感領域は、無線基地局１−２により補間される。 As a result, when it is determined that the terminal 3 is located in the interference area with the radio base station 1-2, the insensitive area due to the beam of the radio base station 1-1 is determined from the interference table 23 as the radio base station 1-1. In order to generate a beam to be interpolated by 1-2, a third weighting factor W3 is acquired and transmitted to the radio base station 1-2 via the radio base station communication means 21. Thereby, as shown in FIG. 1A, the terminal 3 is not interfered with the transmission wave of the adjacent radio base station 1-2, and the insensitive area by the radio base station 1-1 is the radio base station. Interpolated by 1-2.

一方、無線基地局１−１から取得した通信中の端末３の位置情報が、干渉テーブル２３に登録されていない場合には、制御手段２５は、端末３に要求される通信品質が所定の品質を満たすか否かを判断し（ステップＳ３４）、所定の品質を満たさない場合には、端末３を干渉領域確認対象端末として（ステップＳ３５）、該端末３から取得した位置情報に基づいて、隣接する無線基地局１−２が端末３にビームを向けるための重み係数Ｗ２を算出する（ステップＳ３６）。 On the other hand, when the position information of the terminal 3 in communication acquired from the radio base station 1-1 is not registered in the interference table 23, the control unit 25 determines that the communication quality required for the terminal 3 is a predetermined quality. If the predetermined quality is not satisfied (step S34), the terminal 3 is set as the interference area confirmation target terminal (step S35), and the adjacent information is obtained based on the position information acquired from the terminal 3. The weighting factor W2 for the radio base station 1-2 to direct the beam to the terminal 3 is calculated (step S36).

ここで、ステップＳ３４では、例えば、端末３が行っている通信の優先度（プライオリティ）に基づいて、通信品質を判定する。例えば、プライオリティがリアルタイム性の低い通信（Ｗｅｂアクセスなど）の場合には、端末３を干渉領域確認のための対象端末とする。 Here, in step S34, for example, the communication quality is determined based on the priority (priority) of communication performed by the terminal 3. For example, in the case of communication with low real-time priority (such as Web access), the terminal 3 is set as a target terminal for checking the interference area.

また、プライオリティが、リアルタイム性が要求される通信（例えば、ＶｏＩＰなど）の場合であっても、無線基地局１−１の端末３に対する帯域割り当てに余裕がある場合には、端末３を干渉領域確認のための対象端末とする。例えば、ＶｏＩＰ通信の場合には、２０ｍｓ間隔でＲＴＰパケットが送出されるが、例えば、ＷｉＭＡＸの場合には、フレームが５ｍｓであるので、無線通信上において、ＶｏＩＰの１パケットが１回破棄されたとしても、次のＶｏＩＰパケットの送出までの間に再送処理にて、補間することが可能である。したがって、この場合には、端末３を干渉領域確認のための対象端末とする。 Even if the priority is communication (for example, VoIP, etc.) that requires real-time characteristics, if there is a margin in bandwidth allocation to the terminal 3 of the radio base station 1-1, the terminal 3 is moved to the interference area. The target terminal for confirmation. For example, in the case of VoIP communication, RTP packets are sent at intervals of 20 ms. For example, in the case of WiMAX, since the frame is 5 ms, one VoIP packet is discarded once in wireless communication. However, it is possible to interpolate by retransmission processing until the next VoIP packet is sent. Therefore, in this case, the terminal 3 is a target terminal for checking the interference area.

この場合、後述するステップＳ３７において、端末３が無線基地局１−２により干渉を受けたか否かを確認する際は、通信制御装置２から干渉確認タイミング後のフレームにて、無線基地局１−１から端末３への再送用の帯域確保を要求しておき、もし、干渉確認タイミングにて、端末３からの送信が無線基地局１−１にて受信できなかった場合には、前もって確保していた再送タイミングで送信するように要求する。なお、干渉確認タイミングにて、端末３からの送信が無線基地局１−１にて受信できた場合には、前もって確保していた再送用の帯域は、破棄するか、あるいは、他の端末にて必要と判断した場合には、他の端末に割り当てる。 In this case, when confirming whether or not the terminal 3 has received interference from the radio base station 1-2 in step S37 described later, the radio base station 1- 1 is requested to secure a bandwidth for retransmission from the terminal 3 and if the transmission from the terminal 3 cannot be received by the radio base station 1-1 at the interference confirmation timing, the bandwidth is secured in advance. Request transmission at the retransmit timing. When the transmission from the terminal 3 can be received by the radio base station 1-1 at the interference confirmation timing, the retransmission band reserved in advance is discarded or is transmitted to another terminal. If it is judged necessary, it is assigned to another terminal.

また、ステップＳ３６では、隣接無線基地局抽出手段２２により、端末３の位置情報を中心とし、通信可能距離を半径とする円に含まれる無線基地局を、隣接する無線基地局として抽出し（接続中の無線基地局１−１は除く）、抽出された隣接する無線基地局について、端末３の位置情報に基づいて、重み係数算出手段２４により、端末３に対して通信の干渉要因となるように重み係数Ｗ２を算出する。なお、隣接する無線基地局が複数抽出された場合には、距離の短い方から重み係数Ｗ２を算出し、干渉テーブル２３には、同一位置において、未計算の無線基地局がある旨を保持しておき、同一位置（距離が一定値以下）の場合、未計算の基地局を優先して演算を行う。 In step S36, the adjacent radio base station extracting means 22 extracts radio base stations included in a circle centered on the position information of the terminal 3 and having a communicable distance as a radius as adjacent radio base stations (connections). And the extracted adjacent radio base station becomes an interference factor of communication with the terminal 3 by the weighting factor calculation means 24 based on the position information of the terminal 3. The weight coefficient W2 is calculated. When a plurality of adjacent radio base stations are extracted, the weighting factor W2 is calculated from the shorter distance, and the interference table 23 holds that there are uncalculated radio base stations at the same position. In the case of the same position (distance is equal to or less than a certain value), calculation is performed with priority given to uncalculated base stations.

重み係数Ｗ２を算出したら、これを無線基地局通信手段２１から対応する無線基地局（ここでは、無線基地局１−２）へ送信し、これにより無線基地局１−２において、ビーム生成手段１５により、図１（ｂ）に示したように、端末３にビームを向けるように制御する。 When the weighting factor W2 is calculated, it is transmitted from the radio base station communication means 21 to the corresponding radio base station (here, the radio base station 1-2), whereby the beam generation means 15 is transmitted to the radio base station 1-2. Thus, as shown in FIG. 1B, control is performed so that the beam is directed toward the terminal 3.

その後、通信制御装置２は、無線基地局１−１に対して、端末３からの送信信号が受信できたか否かを問い合わせ（ステップＳ３７）、受信できた旨のメッセージを無線基地局１−１から受信した場合には、端末３に対する干渉はないものとして、干渉テーブル２３に記憶することなく処理を終了する。これに対し、無線基地局１−１から端末３からの送信信号が受信できなかった旨のメッセージを受信した場合には、端末３は、無線基地局１−２の送信波に干渉されているものとして、無線基地局１−１から取得した重み係数ｗ１を第１重み係数Ｗ１とし、通信制御装置２の重み係数算出手段２４で算出した重み係数Ｗ２を第２重み係数Ｗ２とし、無線基地局１−１から取得した端末３の位置情報を干渉領域を示す位置情報として、これらを対応させて、例えば図４に示す記録フォーマットで、干渉テーブル２３に保存する（ステップＳ３８）。 Thereafter, the communication control device 2 inquires of the radio base station 1-1 whether or not the transmission signal from the terminal 3 has been received (step S37), and sends a message indicating that the transmission has been received to the radio base station 1-1. Is received, the processing is terminated without storing in the interference table 23 on the assumption that there is no interference with the terminal 3. On the other hand, when the message indicating that the transmission signal from the terminal 3 cannot be received from the radio base station 1-1, the terminal 3 is interfered with the transmission wave of the radio base station 1-2. The weighting factor w1 acquired from the radio base station 1-1 is the first weighting factor W1, the weighting factor W2 calculated by the weighting factor calculating means 24 of the communication control device 2 is the second weighting factor W2, and the radio base station The position information of the terminal 3 acquired from 1-1 is stored as position information indicating the interference area in the interference table 23 in correspondence with the position information, for example, in the recording format shown in FIG. 4 (step S38).

図４に示す記録フォーマットは、位置情報に対して、関連する無線基地局数と、無線基地局数に応じた識別子と、データポインタとを有している。各々の無線基地局の重み係数は、識別子に続くデータポインタが示すアドレスに記憶する。例えば、アドレスＰ１，Ｐ２で示すように、基地局識別子、位置情報、搬送波帯域情報、アンテナ数、データポインタを保持したアドレスを設け、そのデータポインタに、アドレスＰ３，Ｐ４で示すように、対応する無線基地局に配されたアンテナの識別子と対応させて重み係数を記憶する。なお、別に無線基地局の識別子毎のインディックスファイルを生成し、個々の無線基地局に関係する重み係数を有する情報にリンクできるようにしてもよい。例えば、無線基地局の識別子１に対して、重み情報として、アドレスＰ１をリンクさせる。 The recording format shown in FIG. 4 has the number of radio base stations related to the position information, an identifier corresponding to the number of radio base stations, and a data pointer. The weighting factor of each radio base station is stored at the address indicated by the data pointer following the identifier. For example, as shown by addresses P1 and P2, an address holding a base station identifier, position information, carrier band information, the number of antennas, and a data pointer is provided, and the data pointer corresponds as shown by addresses P3 and P4. The weighting factor is stored in association with the identifier of the antenna arranged in the radio base station. In addition, an index file for each identifier of the radio base station may be generated separately and linked to information having a weighting factor related to each radio base station. For example, the address P1 is linked to the identifier 1 of the radio base station as weight information.

本実施の形態では、端末３と通信中の無線基地局の重み係数に対して、端末３が干渉領域に位置するか否かを判定するため、端末３と通信中の無線基地局から、該当する第１重み係数が存在するかを容易に検索できるようにするため、好ましくは、無線基地局毎にデータポインタ（例えば、アドレスＰ１）を集めた集合を作っておく。また、伝搬特性は、搬送波周波数に応じて異なるので、搬送波周波数に応じて、探索の分岐ができるように構造化しておく。 In the present embodiment, in order to determine whether the terminal 3 is located in the interference area with respect to the weighting factor of the radio base station in communication with the terminal 3, the radio base station in communication with the terminal 3 In order to make it possible to easily search for the presence of the first weighting factor, a set of data pointers (for example, addresses P1) is preferably created for each radio base station. In addition, since the propagation characteristics vary depending on the carrier frequency, the propagation characteristics are structured so that the search can be branched according to the carrier frequency.

さらに、本実施の形態では、ステップＳ３８において、干渉領域の位置情報と対応させて無線基地局１−１の第１重み係数Ｗ１と、無線基地局１−２の第２重み係数Ｗ２とを干渉テーブル２３に記憶するのに合わせて、重み係数算出手段２４において、第１重み係数Ｗ１に基づいて、無線基地局１−２が、この干渉領域を避けて、無線基地局１−１の不感領域を補間するビームを生成するための第３重み係数Ｗ３を算出し、その算出した第３重み係数を、当該位置情報あるいは第１重み係数Ｗ１に対応させて、干渉テーブル２３に記憶する。 Further, in the present embodiment, in step S38, the first weighting factor W1 of the radio base station 1-1 and the second weighting factor W2 of the radio base station 1-2 are interfered with each other in correspondence with the position information of the interference area. In accordance with the storage in the table 23, in the weighting factor calculation means 24, based on the first weighting factor W1, the radio base station 1-2 avoids this interference region, and the dead region of the radio base station 1-1. The third weighting factor W3 for generating a beam for interpolating the first weighting factor W3 is calculated, and the calculated third weighting factor is stored in the interference table 23 in association with the position information or the first weighting factor W1.

したがって、本実施の形態において、通信制御装置２の無線基地局通信手段２１が受信手段、送信手段および重み係数取得手段を構成し、制御手段２５が干渉領域判定手段を構成している。 Therefore, in the present embodiment, the radio base station communication means 21 of the communication control device 2 constitutes reception means, transmission means, and weight coefficient acquisition means, and the control means 25 constitutes interference area determination means.

以下、通信制御装置２の重み係数算出手段２４で算出する第３重み係数の算出処理の一例について説明する。第３重み係数を算出するにあたっては、先ず、無線基地局１−１の不感領域を探索する。不感領域を探索するには、例えば、地図情報をボクセル空間上に配置して、ボクセル空間上に地図情報に基づいた（反射係数を有する）建造物を構成する。また、無線基地局１−１を含む隣接する各無線基地局１のアンテナ配置情報を取得して、端末３と通信中の無線基地局１−１については、端末３に対する重み付け（第１重み係数）を優先して設定し、他端末と無線接続されない無線基地局については、アンテナを無指向性に設定する。 Hereinafter, an example of the third weighting factor calculation process calculated by the weighting factor calculation unit 24 of the communication control device 2 will be described. In calculating the third weighting factor, first, a dead area of the radio base station 1-1 is searched. In order to search the insensitive area, for example, map information is arranged on the voxel space, and a building (having a reflection coefficient) based on the map information is configured on the voxel space. Also, the antenna arrangement information of each adjacent radio base station 1 including the radio base station 1-1 is acquired, and the radio base station 1-1 in communication with the terminal 3 is weighted with respect to the terminal 3 (first weighting factor). ) Is set with priority, and for a radio base station that is not wirelessly connected to other terminals, the antenna is set to be omnidirectional.

例えば、図５に示すように、無線基地局１−１〜１−３が設置されたエリアに、端末３および端末４が存在し、端末３は無線基地局１−１と通信し、端末４は待ち受け状態にある場合には、無線基地局１−２および無線基地局１−３は、いずれの端末とも通信を行っていないので、それぞれのアンテナを無指向性に設定し、端末３と通信中の無線基地局１−１については、端末３との通信に使用されているアンテナは、端末３に対する重み付けを優先し、通信に関与しないアンテナは無指向性に設定する。 For example, as illustrated in FIG. 5, the terminal 3 and the terminal 4 exist in the area where the radio base stations 1-1 to 1-3 are installed. The terminal 3 communicates with the radio base station 1-1, and the terminal 4 Is in a standby state, the radio base station 1-2 and the radio base station 1-3 are not communicating with any of the terminals, so that each antenna is set to be non-directional and communicates with the terminal 3. For the radio base station 1-1 in the middle, the antenna used for communication with the terminal 3 gives priority to weighting for the terminal 3, and the antenna not involved in communication is set to be non-directional.

この状態で、各無線基地局１の送信電力特性を算出して、各無線基地局１を中心として送信電力特性を均等に膨張する。ここで、送信電力特性をボクセル空間上で膨張させる場合、建造物などに衝突した場合には、その衝突点における反射特性に応じて、膨張方向を変更する。 In this state, the transmission power characteristic of each radio base station 1 is calculated, and the transmission power characteristic is uniformly expanded around each radio base station 1. Here, when the transmission power characteristic is expanded in the voxel space, when the vehicle collides with a building or the like, the expansion direction is changed according to the reflection characteristic at the collision point.

送信電力特性の膨張ステップを繰り返し、端末３と通信中の無線基地局１−１と、隣接する無線基地局１−２との送信電力特性が接した場合には、膨張ステップを停止し、その状態で、無線基地局１−１と、隣接する無線基地局１−２および無線基地局１−３とのそれぞれの送信電力特性に包含されない領域を、無線基地局１−１の不感領域Ｂとして設定する。 The expansion step of the transmission power characteristic is repeated, and when the transmission power characteristic of the radio base station 1-1 communicating with the terminal 3 and the adjacent radio base station 1-2 is in contact, the expansion step is stopped, In this state, an area that is not included in the transmission power characteristics of the radio base station 1-1 and the adjacent radio base station 1-2 and radio base station 1-3 is defined as a dead area B of the radio base station 1-1. Set.

このようにして無線基地局１−１の不感領域Ｂを探索したら、隣接する無線基地局１−２および無線基地局１−３について、それぞれ端末の通信に関与しないアンテナを用いて不感領域Ｂを包含する重み付け（第３重み係数）を算出する。 After searching the insensitive area B of the radio base station 1-1 in this way, the insensitive area B is detected for each of the adjacent radio base station 1-2 and radio base station 1-3 by using an antenna not involved in terminal communication. An inclusion weight (third weighting factor) is calculated.

次に、不感領域Ｂの重み付けを算出する処理の一例について説明する。先ず、図６に示すように、ボクセル空間内で、任意の不感領域Ｂを目的領域Ｃとして、その目的領域Ｃの任意の点を代表点Ｄとして算出する。次に、代表点から全方向に光線追跡法による光線を走らせる。光線は、建築物５などに衝突した場合、衝突点の反射特性（例えば、ランバート反射）、法線ベクトルに基づいて、予め定めた拡散本数分、拡散させる。 Next, an example of processing for calculating the weight of the insensitive area B will be described. First, as shown in FIG. 6, an arbitrary insensitive area B is calculated as a target area C and an arbitrary point of the target area C is calculated as a representative point D in the voxel space. Next, the light ray by the ray tracing method is run in all directions from the representative point. When the light beam collides with the building 5 or the like, the light beam is diffused by a predetermined number of diffusions based on the reflection characteristic (for example, Lambertian reflection) of the collision point and the normal vector.

光線の進行距離に応じた減衰特性を設定して、光線の生存値が一定値以下になった場合には、当該光線を消滅（追跡を終了）させる。ここで、光線の生存値は、送信電力の減衰特性に基づいて算出する。すなわち、送信された電力は、距離の２乗に反比例して減衰するので、距離Ｒを半径する球面上の微小面積ΔＳを通過する電力Ｐ（Ｒ）は、元の送信電力をＰとすると、Ｐ(Ｒ)＝ΔＳ／（４πＲ^２）×Ｐ、となる。したがって、生存値Ｐ（Ｒ）が、一定値以下になった場合には、当該光線を消滅させる。なお、この場合の元の送信電力Ｐは、好ましくは、最後に隣接する無線基地局（図５では、無線基地局１−２）から、代表点Ｄを含む不感領域Ｃに対してビームを向けることを考慮して、ビームを向けた際の無線基地局１−２の送信電力とする。 Attenuation characteristics are set according to the travel distance of the light beam, and when the survival value of the light beam is below a certain value, the light beam is extinguished (tracking is terminated). Here, the survival value of the light beam is calculated based on the attenuation characteristic of the transmission power. That is, since the transmitted power attenuates in inverse proportion to the square of the distance, the power P (R) that passes through a small area ΔS on the spherical surface that radiates the distance R is P. P (R) = ΔS / (4πR ² ) × P. Therefore, when the survival value P (R) becomes a certain value or less, the light beam is extinguished. In addition, the original transmission power P in this case preferably directs the beam from the adjacent radio base station (radio base station 1-2 in FIG. 5) to the dead area C including the representative point D. Considering this, the transmission power of the radio base station 1-2 when the beam is directed is used.

光線が隣接する無線基地局１−２に到達した場合には、その時の光路および反射に応じた値（光路長Ｌおよび反射によって減衰した電力）を、当該代表点Ｄにおける電界特性として、加算し、その光線の追跡を終了する。 When the light beam reaches the adjacent radio base station 1-2, the value corresponding to the optical path and the reflection at that time (the optical path length L and the power attenuated by the reflection) is added as the electric field characteristic at the representative point D. , End the ray tracing.

その後、隣接する無線基地局１−２のアンテナへの光線の到来角度φ、光線の生存値に基づいて、仮想送信電力特性を形成する。この場合のアンテナのビーム方向は、無線基地局１−２に到達した光線のうち、光線の到達時の電力が最も大きい方向とする。ただし、最も大きい値を有する光線が複数ある場合には、各光線の光路長Ｌｎと搬送波周波数ｆとから、位相差（Ｌｎ／（１／ｆ））を算出し、位相差を特定角度で区分して、その時のヒストグラムを取った場合に、最も個数の多い区分に含まれる光線を有効として、その光線の方向にビームを向ける。 Thereafter, the virtual transmission power characteristic is formed based on the arrival angle φ of the light beam to the antenna of the adjacent radio base station 1-2 and the survival value of the light beam. The beam direction of the antenna in this case is the direction in which the power at the time of the arrival of the light beam is the largest among the light beams that have reached the radio base station 1-2. However, when there are a plurality of light beams having the largest value, the phase difference (Ln / (1 / f)) is calculated from the optical path length Ln of each light beam and the carrier frequency f, and the phase difference is classified by a specific angle. Then, when the histogram at that time is taken, the light ray included in the segment with the largest number is made effective, and the beam is directed in the direction of the light ray.

光線が、隣接する１つの無線基地局ではなく、隣接する複数の無線基地局に到達した場合には、各々の無線基地局においてビームを決定した光線による電力合計（１つの光線のみの場合は、その光線が基地局に到達した際の電力、複数の光線を選択した場合はその合計）を比較し、最も電力合計が大きい無線基地局を選択して、その選択した無線基地局のみが、その代表点にビームを向けるようにする。 When a light beam arrives at a plurality of adjacent radio base stations instead of one adjacent radio base station, the total power by the light beam determined by each radio base station (in the case of only one light beam, Compare the power when the light beam reaches the base station, or the total when multiple light beams are selected), select the radio base station with the largest total power, and only the selected radio base station Direct the beam to the representative point.

その後、仮想送信電力特性から、生存値の高い方向にビームのピークが合い、生存値の低い方向にヌルが合うように第３重み係数を算出する。 Thereafter, from the virtual transmission power characteristics, the third weighting coefficient is calculated so that the beam peak is aligned in the higher survival value direction and null is aligned in the lower survival value direction.

なお、このようにして算出した第３重み係数を用いて、隣接する無線基地局１−２のビームを生成しても、端末３と通信中の無線基地局１−１から、端末３からの送信信号が受信できない旨のメッセージを受けた場合には、例えば、代表点Ｄからの（異なる方向への）光線数を増加（例えば、２倍）にしたり、反射点における拡散する光線数を増加（例えば、２倍）にしたり、ボクセルを細分化（例えば、ボクセルの１辺の長さを実空間における１０ｍから５ｍに半分に）したりして、前回の重み係数算出時の条件よりも、高分解能の条件下で、第３重み係数を詳細に算出する。 Even if the beam of the adjacent radio base station 1-2 is generated using the third weighting coefficient calculated in this way, the radio base station 1-1 in communication with the terminal 3 can transmit the signal from the terminal 3. When a message indicating that the transmission signal cannot be received is received, for example, the number of rays from the representative point D (in a different direction) is increased (for example, doubled), or the number of rays diffused at the reflection point is increased. (For example, 2 times), or subdividing the voxel (for example, the length of one side of the voxel is halved from 10 m to 5 m in the real space) The third weighting factor is calculated in detail under high resolution conditions.

以上のように、本実施の形態では、干渉テーブル２３に、互いに隣接する無線基地局１−１および無線基地局１−２による干渉領域を示す位置情報と、この干渉領域に、無線基地局１−１がビームを向けるための第１重み係数Ｗ１と、無線基地局１−２がビームを向けるための第２重み係数Ｗ２と、を対応させて記憶するとともに、一方の無線基地局が干渉領域に位置する端末３と通信中は、他方の無線基地局が、この干渉領域を避けて、一方の無線基地局の不感領域を補間するようにビームを生成するための第３重み係数Ｗ３を記憶し、例えば、無線基地局１−１が端末３と通信中には、無線基地局１−１および無線基地局１−２がそれぞれ適用している重み係数ｗ１およびｗ２を取得して、干渉テーブル２３に同じ組み合わせの第１重み係数Ｗ１および第２重み係数Ｗ２があるか否かによって、端末３が干渉領域に位置するか否かを判定し、干渉領域に位置する場合には、第３重み係数Ｗ３を無線基地局１−２に適用して、端末３に対して、無線基地局１−２の送信波が干渉しないようにビーム生成を制御するようにしたので、隣接する無線基地局１−１，１−２間に生じる干渉領域を、各々の無線基地局の重み係数と関連させて取得することができる。したがって、隣接する無線基地局間において、干渉領域および不感領域を低減した重み係数を設定することができ、隣接する無線基地局１−２に干渉されることなく、安定して通信することができる。 As described above, in the present embodiment, the interference table 23 includes the position information indicating the interference area between the radio base station 1-1 and the radio base station 1-2 adjacent to each other, and the radio base station 1 in the interference area. -1 stores the first weighting factor W1 for directing the beam and the second weighting factor W2 for directing the beam by the radio base station 1-2, and stores one radio base station in the interference region. During the communication with the terminal 3 located in the location, the other radio base station stores a third weighting factor W3 for generating a beam so as to interpolate the dead area of one radio base station while avoiding this interference area For example, while the radio base station 1-1 is communicating with the terminal 3, the weighting factors w1 and w2 applied by the radio base station 1-1 and the radio base station 1-2 are obtained, and the interference table is obtained. 23 first weight of the same combination Whether or not the terminal 3 is located in the interference area is determined based on whether or not the number W1 and the second weight coefficient W2 are present. If the terminal 3 is located in the interference area, the third weight coefficient W3 is set to the radio base station 1- 2, the beam generation is controlled so that the transmission wave of the radio base station 1-2 does not interfere with the terminal 3, so that between the adjacent radio base stations 1-1 and 1-2. The resulting interference area can be obtained in association with the weighting factor of each radio base station. Therefore, it is possible to set a weighting coefficient with reduced interference area and dead area between adjacent radio base stations, and to stably communicate without being interfered by the adjacent radio base station 1-2. .

なお、本発明は、上記実施の形態にのみ限定されるものではなく、幾多の変形または変更が可能である。例えば、上記実施の形態では、隣接する無線基地局が同一周波数帯域を使用するものとしたが、使用周波数帯域が異なる場合でも、隣接する無線基地局からの送信波が妨害波となるような場合には、本発明を有効に適用することができる。また、端末３が干渉領域に位置する場合に、隣接する無線基地局のビーム生成を制御する第３重み係数Ｗ３は、不感領域が他の隣接する無線基地局のビームにも影響されるので、干渉テーブル２３に記憶することなく、端末３と通信中の無線基地局から取得した重み係数ｗ１および隣接する各無線基地局から取得した重み係数に基づいて、その都度算出して、適用することもできる。 In addition, this invention is not limited only to the said embodiment, Many deformation | transformation or a change is possible. For example, in the above embodiment, adjacent radio base stations use the same frequency band. However, even when the used frequency band is different, the transmission wave from the adjacent radio base station becomes an interference wave. The present invention can be applied effectively. In addition, when the terminal 3 is located in the interference area, the third weighting factor W3 for controlling the beam generation of the adjacent radio base station is affected by the beam of the other adjacent radio base station in the dead area. Without being stored in the interference table 23, it may be calculated and applied each time based on the weighting coefficient w1 acquired from the radio base station in communication with the terminal 3 and the weighting coefficient acquired from each adjacent radio base station. it can.

本発明の一実施の形態に係る通信システムの原理を説明するための図である。It is a figure for demonstrating the principle of the communication system which concerns on one embodiment of this invention. 図１に示す通信システムにおける各無線基地局および通信制御装置の要部の概略構成を示す機能ブロック図である。It is a functional block diagram which shows schematic structure of the principal part of each radio base station and communication control apparatus in the communication system shown in FIG. 図１に示す干渉テーブルの生成処理を説明するためのフローチャートである。It is a flowchart for demonstrating the production | generation process of the interference table shown in FIG. 図２に示す干渉テーブルの記録フォーマットの一例を示す図である。FIG. 3 is a diagram illustrating an example of a recording format of an interference table illustrated in FIG. 2. 無線基地局の不感領域の探索処理を説明するための図である。It is a figure for demonstrating the dead area search process of a wireless base station. 不感領域に対する重み係数の算出処理を説明するための図である。It is a figure for demonstrating the calculation process of the weighting coefficient with respect to a dead area.

Explanation of symbols

１−１〜１−３無線基地局
２通信制御装置
３，４端末（無線通信装置）
５建築物
１１端末通信手段
１２通信制御装置通信手段
１３制御手段
１５ビーム生成手段
２１無線基地局通信手段
２２干渉領域判定手段
２３干渉テーブル
２４重み係数算出手段
２５制御手段 1-1 to 1-3 Wireless base station 2 Communication control device 3, 4 Terminal (wireless communication device)
DESCRIPTION OF SYMBOLS 5 Building 11 Terminal communication means 12 Communication control apparatus communication means 13 Control means 15 Beam generation means 21 Radio base station communication means 22 Interference area determination means 23 Interference table 24 Weight coefficient calculation means 25 Control means

Claims

A communication control method in a communication system for controlling a plurality of radio base stations equipped with an adaptive array antenna by a communication control device,
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area and weighting factors, a storing step of the second radio base station to the interference region to store a second weighting factor for directing the beam, the interference table in association with,
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. a step of, based on a comparison between the first weighting factor is stored and the second weighting factor, the wireless communication device to determine whether located in the interference region between the second radio base station,
As a result, when the radio communication device is located in an interference area, beam generation in the second radio base station is performed so that the transmission wave of the second radio base station does not interfere with the radio communication device. Controlling , and
The storing step includes
Obtaining information on communication quality required for a wireless communication device wirelessly connected to the first wireless base station;
A determination step of determining whether or not a communication quality required for the wireless communication device satisfies a predetermined quality based on the acquired information on the communication quality;
As a result of the determination, when the communication quality does not satisfy a predetermined quality, the second radio base station is set as the interference area confirmation target apparatus based on the position information acquired from the interference area confirmation target apparatus. A second weighting factor calculating step for calculating a second weighting factor for directing a station beam to the interference area confirmation target device;
Based on the calculated second weighting factor, it is determined whether the first radio base station has acquired a signal from the interference area confirmation target device after the second radio base station has generated a beam. A signal acquisition grasping step,
As a result of the grasping, when the first radio base station has not acquired a signal from the interference area confirmation target apparatus, the interference area confirmation target apparatus includes the first radio base station and the second radio base station. The first weighting factor used by the first radio base station to direct the beam toward the interference region confirmation target apparatus and the second weighting factor calculating step. 2 corresponding to the weighting factor and the position information acquired from the interference area confirmation target device, and stored in the interference table,
A communication control method characterized by the above.

A communication control method in a communication system for controlling a plurality of radio base stations equipped with an adaptive array antenna by a communication control device,
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area Storing a weighting factor in association with a second weighting factor for directing the beam to the interference area in the interference table;
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. Determining whether the radio communication device is located in an interference area with the second radio base station based on a comparison between the first weight coefficient and the second weight coefficient stored in
As a result, when the radio communication device is located in an interference area, beam generation in the second radio base station is performed so that the transmission wave of the second radio base station does not interfere with the radio communication device. Controlling, and
The storing step includes
Determining whether position information acquired from a wireless communication device wirelessly connected to the first wireless base station is stored in the interference table;
As a result of the determination, when position information acquired from the wireless communication device is not stored in the interference table, obtaining information related to communication quality required for the wireless communication device;
A determination step of determining whether or not a communication quality required for the wireless communication device satisfies a predetermined quality based on the acquired information on the communication quality;
As a result of the determination, when the communication quality does not satisfy a predetermined quality, the second radio base station is set as the interference area confirmation target apparatus based on the position information acquired from the interference area confirmation target apparatus. A second weighting factor calculating step for calculating a second weighting factor for directing a station beam to the interference area confirmation target device;
Based on the calculated second weighting factor, it is determined whether the first radio base station has acquired a signal from the interference area confirmation target device after the second radio base station has generated a beam. A signal acquisition grasping step,
As a result of the grasping, when the first radio base station has not acquired a signal from the interference area confirmation target apparatus, the interference area confirmation target apparatus includes the first radio base station and the second radio base station. The first weighting factor used by the first radio base station to direct the beam toward the interference region confirmation target apparatus and the second weighting factor calculating step. 2 corresponding to the weighting factor and the position information acquired from the interference area confirmation target device, and stored in the interference table,
A communication control method characterized by the above.

The relative interference region confirmation target device, while securing the band corresponding to the communication quality, the communication control method according to claim 1 or 2, characterized in that allocating a bandwidth for the interference region confirmation.

A communication system including a plurality of radio base stations provided with an adaptive array antenna and a communication control device for controlling the plurality of radio base stations,
Each of the plurality of radio base stations
A communication control device communication means for transmitting a weighting factor applied to beam generation to the communication control device and receiving a weighting factor from the communication control device;
The communication control device includes:
Receiving means for receiving the weighting factor transmitted from each radio base station;
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area An interference table that stores a weighting factor and a second weighting factor for causing the second radio base station to direct the beam to the interference area;
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. An interference area determination that determines whether or not the wireless communication device is located in an interference area with the second radio base station based on a comparison between the first weight coefficient and the second weight coefficient stored in Means,
When the interference area determination means determines that the wireless communication apparatus is located in the interference area, based on the weighting factor of the first wireless base station received by the reception means, the wireless communication apparatus Weight coefficient calculation means for calculating a third weight coefficient for controlling beam generation of the second radio base station so that the transmission waves of the second radio base station do not interfere with each other;
Transmitting means for transmitting the calculated third weighting coefficient to the second radio base station,
The location information stored in the interference table indicates that the wireless communication device is in an interference area confirmation when the communication quality required for the wireless communication device wirelessly connected to the first wireless base station does not satisfy a predetermined quality. Position information acquired from the interference area confirmation target device as the target device,
The second weight coefficient stored in the interference table is a weight for directing the beam of the second radio base station to the interference area confirmation target device based on position information acquired from the interference area confirmation target device. Coefficient,
The first weighting factor stored in the interference table is a signal generated by the second radio base station based on the second weighting factor, and the first radio base station receives a signal from the interference area confirmation target device. Is a weighting factor used by the first radio base station to direct the beam to the interference area confirmation target device,
A communication system configured to control beam generation in the second radio base station based on the third weighting factor transmitted from the communication control apparatus.

A plurality of communication control unit for controlling the radio base station having an adaptive array antenna,
Weight coefficient acquisition means for acquiring a weight coefficient applied to beam generation from each of the plurality of radio base stations;
Among the plurality of radio base stations, position information indicating an interference area by a first radio base station and a second radio base station adjacent to each other, and a first for the first radio base station to direct a beam to the interference area An interference table that stores a weighting factor and a second weighting factor for causing the second radio base station to direct the beam to the interference area;
While the first radio base station is communicating with the radio communication device, the weight coefficients applied by the first radio base station and the second radio base station are acquired, and the acquired weight coefficients and the interference table are acquired. An interference area determination that determines whether or not the wireless communication device is located in an interference area with the second radio base station based on a comparison between the first weight coefficient and the second weight coefficient stored in Means,
When the interference area determination means determines that the wireless communication apparatus is located in the interference area, the interference area determination means determines whether the wireless communication apparatus is based on the weight coefficient of the first radio base station acquired by the weight coefficient acquisition means. On the other hand, weight coefficient calculation means for calculating a third weight coefficient for controlling beam generation of the second radio base station so that the transmission waves of the second radio base station do not interfere with each other,
Transmitting means for transmitting the calculated third weighting coefficient to the second radio base station,
The location information stored in the interference table indicates that the wireless communication device is in an interference area confirmation when the communication quality required for the wireless communication device wirelessly connected to the first wireless base station does not satisfy a predetermined quality. Position information acquired from the interference area confirmation target device as the target device,
The second weight coefficient stored in the interference table is a weight for directing the beam of the second radio base station to the interference area confirmation target device based on position information acquired from the interference area confirmation target device. Coefficient,
The first weighting factor stored in the interference table is a signal generated by the second radio base station based on the second weighting factor, and the first radio base station receives a signal from the interference area confirmation target device. Is a weighting factor used by the first radio base station to direct a beam toward the interference area confirmation target device,
A communication control device.