JP4831572B2 - Mobile communication system - Google Patents

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JP4831572B2
JP4831572B2 JP2006192564A JP2006192564A JP4831572B2 JP 4831572 B2 JP4831572 B2 JP 4831572B2 JP 2006192564 A JP2006192564 A JP 2006192564A JP 2006192564 A JP2006192564 A JP 2006192564A JP 4831572 B2 JP4831572 B2 JP 4831572B2
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英延 井上
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本発明は、通信中の携帯電話機等の無線端末の移動経路を予測可能とする移動通信システムに関する。   The present invention relates to a mobile communication system that can predict a movement route of a wireless terminal such as a mobile phone in communication.

複数の無線基地局が、それぞれのサービスエリアが一部重なるように分散配置され、或る無線基地局との間で通信中の無線端末が、その無線基地局のサービスエリアを外れる方向に移動する場合、通信を継続する為には、移動先の無線基地局に切替える処理が必要である。しかし、移動先の無線基地局に於いて、通信を行う上で必要となるリソース、例えば、輻輳等により無線チャネルの確保ができない事態が発生すると、無線端末は通信を継続することができなくなる。   A plurality of radio base stations are distributed and arranged so that their service areas partially overlap, and a radio terminal communicating with a radio base station moves in a direction away from the service area of the radio base station In this case, in order to continue communication, it is necessary to perform processing for switching to the destination radio base station. However, if a situation occurs in which a radio channel cannot be secured due to resources required for communication, for example, congestion, etc., at the destination radio base station, the radio terminal cannot continue communication.

このような問題を解決する為に、従来、無線基地局に、例えば、指向性アンテナによる無線端末からの受信レベルの変化により、電波の入射角度の変化を検出し、無線端末の位置とその変化とを求めて、無線端末の移動速度と移動方向とを示す位置情報を検出し、この位置情報を、無線基地局の上位の制御局に於いて収集し、その制御局に於いて無線端末の移動先を予測し、その予測した無線基地局に対してリソース確保を指示するシステムが提案されている（例えば、特許文献１参照）。   In order to solve such a problem, conventionally, a radio base station detects, for example, a change in the incident angle of a radio wave due to a change in a reception level from a radio terminal by a directional antenna, and a position of the radio terminal and the change thereof. The position information indicating the moving speed and direction of the wireless terminal is detected, and this position information is collected at a control station higher than the wireless base station, and the wireless terminal There has been proposed a system for predicting a destination and instructing the predicted radio base station to secure resources (see, for example, Patent Document 1).

又ＣＤＭＡ方式を提供したシステムに於いて、無線基地局の上位の制御局は、無線端末の位置情報を無線基地局から収集して、無線端末の現在位置と、移動速度と、移動方向とを算出し、地図情報を基に、予め必要なパス数を定めたパス数マップを参照して、必要とするパスを設定する無線基地局を決定するシステムが提案されている（例えば、特許文献２参照）。   In the system that provides the CDMA system, the upper control station of the radio base station collects the location information of the radio terminal from the radio base station, and determines the current location of the radio terminal, the moving speed, and the moving direction. A system has been proposed in which a wireless base station that sets a required path is determined by referring to a path number map in which a required number of paths is determined in advance based on map information (for example, Patent Document 2). reference).

又無線端末に、ＧＰＳ（Ｇｌｏｂａｌ Ｐｏｓｉｔｉｏｎｉｎｇ Ｓｙｓｔｅｍ）ユニットを設け、測位した位置情報とその時点の時刻情報とを基地局に送信し、この基地局を介して移動予測装置に転送し、位置情報の変化と時刻情報とを基に、移動速度と移動方向とを求め、地図情報による道路や鉄道等の移動経路情報を参照して、無線端末の移動経路を予測し、現在通信中の無線基地局から、隣接した無線基地局と通信可能となるサービスエリアに到達する時間を予測して、移動先の無線基地局に対して無線チャネルの予約と、無線端末に対して移動先無線基地局及び無線チャネル情報を通知するシステムが提案されている（例えば、特許文献３参照）。
特開平１１−１０３４７９号公報 特開２０００−２１７１３８号公報 特開２００４−２２８８８１号公報 In addition, a GPS (Global Positioning System) unit is provided in the wireless terminal, and the position information obtained by positioning and the time information at that time are transmitted to the base station, transferred to the movement prediction device via this base station, and the change in position information. Based on the time information and the travel speed, the travel speed and the travel direction are obtained, the travel route information such as roads and railways based on the map information is referred to, the travel route of the wireless terminal is predicted, and the current wireless base station is communicating. Predicting the time to reach a service area that can communicate with an adjacent radio base station, reserving a radio channel for a destination radio base station, and a destination radio base station and radio channel for a radio terminal A system for notifying information has been proposed (see, for example, Patent Document 3).
Japanese Patent Laid-Open No. 11-103479 JP 2000-217138 A JP 2004-228881 A

無線端末の移動予測を行って、移動先の無線基地局のリソース確保を行うことにより、高速で移動する無線端末に対しても、通信の継続を維持するように制御することが可能となる。その場合、無線端末の位置情報の時間経過による変化により、移動方向と移動速度とを求めることが可能であり、前述の特許文献１〜３にも説明されている。一般的に、無線端末の移動経路は、例えば、道路に沿って移動する場合、現在位置から複数存在するものであり、従って、移動方向予測精度を向上する為には、短い時間間隔で位置情報を取得する必要がある。又無線端末は、通信中に於いて、停止状態或いは移動速度が極めて低い場合があり、従って、通信終了まで、同一の無線基地局との間で通信し、隣接の無線基地局への切替えが行われない場合もある。   By performing the movement prediction of the wireless terminal and securing the resources of the movement-destination wireless base station, it is possible to control the wireless terminal moving at high speed so as to maintain the continuation of communication. In that case, it is possible to obtain the moving direction and the moving speed based on the change of the position information of the wireless terminal over time, which is also described in Patent Documents 1 to 3 described above. In general, when moving along a road, for example, there are a plurality of movement paths of a wireless terminal from the current position. Therefore, in order to improve movement direction prediction accuracy, position information is acquired at short time intervals. Need to get. In addition, the wireless terminal may be stopped or moving at a very low speed during communication. Therefore, until the end of communication, the wireless terminal communicates with the same wireless base station and can switch to the adjacent wireless base station. Sometimes not done.

前述の従来例に於いては、無線端末の移動先の予測手段は、無線端末が高速移動する場合、精度を向上する為に、位置情報の取得時間間隔を短くすることが必要となる。しかし、それによって無線端末と無線基地局との間及び無線基地局と制御局との間のトラフィックが増加し、通常の通信の為のトラフィックを圧迫する問題と、短い時間間隔で位置情報を送信することから、無線端末の消費電力の増大の問題とがある。   In the above-described conventional example, when the wireless terminal moves at high speed, the wireless terminal movement destination predicting means needs to shorten the position information acquisition time interval in order to improve accuracy. However, this increases the traffic between the wireless terminal and the wireless base station and between the wireless base station and the control station, and the problem of squeezing traffic for normal communication and transmission of location information at short time intervals Therefore, there is a problem of increase in power consumption of the wireless terminal.

本発明は、従来の問題点を解決するものであり、経済的に無線端末の移動経路を予測するものであり、その予測に基づく渋滞予測も可能とするものである。   The present invention solves the conventional problems, and predicts the movement route of a wireless terminal economically, and also enables congestion prediction based on the prediction.

本発明の移動通信システムは、無線端末の現在位置を示す位置情報と、前記無線端末の移動速度情報と、前記無線端末の移動方向情報とを含む移動情報を求めて保持する無線端末と、前記無線端末の前記移動情報を継続して収集することにより前記無線端末の移動経路を予測する移動予測機能部を備え、前記移動予測機能部が予測する前記移動経路上にあって前記無線端末の移動先と予測される無線基地局が、前記移動先と予測される無線基地局に於けるリソース使用状況に基づいて前記無線端末に対するリソースを予約する構成を備えている。 The mobile communication system of the present invention is a wireless terminal that obtains and holds movement information including position information indicating a current position of a wireless terminal, movement speed information of the wireless terminal, and movement direction information of the wireless terminal, moving includes moving prediction function unit for predicting a movement path of the wireless terminal by gathering continues the movement information of the wireless terminal, be on the moving path the moving prediction function unit predicts the wireless terminal The radio base station predicted to be the destination has a configuration for reserving resources for the radio terminal based on the resource usage status in the radio base station predicted to be the destination .

又前記無線端末は、前記移動予測機能部からの送信要求又は送信条件指示に従って、保持している前記移動情報を前記無線基地局と前記基地局制御局とを介して前記移動予測機能部へ送信する構成を備えている。   The wireless terminal transmits the held movement information to the movement prediction function unit via the wireless base station and the base station control station in accordance with a transmission request or transmission condition instruction from the movement prediction function unit. It has a configuration to do.

又前記移動予測機能部は、前記無線端末からの移動情報を基に該無線端末の移動経路を予測し、予測できない時に該無線端末に継続して移動情報送信を指示し、移動経路を予測した時は、該移動経路に沿った移動先の無線基地局がリソース不足の時に、リソース予約を前記基地局制御局に通知する構成を備えている。   The movement prediction function unit predicts a movement path of the wireless terminal based on movement information from the wireless terminal, and when the prediction cannot be performed, continuously instructs the wireless terminal to transmit movement information, and predicts the movement path. In some cases, the mobile station has a configuration for notifying the base station control station of resource reservation when the destination radio base station along the movement path is short of resources.

又前記無線端末と前記無線基地局と前記基地局制御局と前記移動予測機能部とを含む前記移動通信システムに、渋滞予測機能部を設け、該渋滞予測機能部は、前記移動予測機能部に於いて収集した前記無線端末の移動情報に含まれる移動速度情報が所定の速度以下に低下したことを示す無線端末数を基に、前記無線端末の移動方向の渋滞予測を行う構成を備えている。   The mobile communication system including the wireless terminal, the wireless base station, the base station control station, and the movement prediction function unit is provided with a traffic congestion prediction function unit, and the traffic congestion prediction function unit is provided in the movement prediction function unit. The mobile terminal has a configuration for performing congestion prediction in the moving direction of the wireless terminal based on the number of wireless terminals indicating that the moving speed information included in the collected movement information of the wireless terminal has decreased to a predetermined speed or less. .

又前記渋滞予測機能部は、前記無線端末の移動方向の渋滞予測により、前記無線端末に渋滞予測情報又は迂回経路情報を通知する構成を備えている。   The traffic jam prediction function unit is configured to notify the radio terminal of traffic jam prediction information or detour route information based on traffic jam prediction in the moving direction of the radio terminal.

無線端末は、位置情報と移動速度と移動方向とを含む移動情報について、移動情報通知条件に従って送信するものであり、例えば、移動速度と移動方向とが変化する無線端末からは、移動情報を所定の間隔で継続的に送信することになるが、移動しない無線端末は、移動情報を継続的に送信する必要がなく、又一定速度且つ一定方向に移動する無線端末は、移動予測機能部に於いて移動予測ができた段階で、継続的に移動情報を送信する必要がなくなり、従って、無用なトラフィックを低減することができる利点がある。又移動予測機能部は、無線端末からの移動情報は、位置情報と、速度情報と、方向情報とを含むから、現在位置の無線端末の移動経路予測を迅速に行うことが可能となり、高速移動する無線端末の移動先となる無線基地局に於けるリソース確保等の通知も迅速に行うことが可能となる。それにより、無線端末は、高速移動する場合も、通信を継続することが可能となる利点がある。   The wireless terminal transmits the movement information including the position information, the movement speed, and the movement direction in accordance with the movement information notification condition. For example, the movement information is transmitted from the wireless terminal in which the movement speed and the movement direction are changed. However, a wireless terminal that does not move does not need to transmit movement information continuously, and a wireless terminal that moves at a constant speed and in a certain direction Therefore, there is no need to continuously transmit the movement information at the stage where the movement prediction has been made, and there is an advantage that unnecessary traffic can be reduced. In addition, since the movement information from the wireless terminal includes position information, speed information, and direction information, the movement prediction function unit can quickly make a movement path prediction of the wireless terminal at the current position, and move at high speed. It is also possible to promptly notify the resource securing etc. at the radio base station that is the destination of the radio terminal to be moved. Thereby, even when the wireless terminal moves at a high speed, there is an advantage that communication can be continued.

更に、移動予測機能部による無線端末の移動予測情報を基に、渋滞予測機能部により、無線端末の移動経路の渋滞予測が可能となり、渋滞発生の予測を行った場合、その地点に対して移動予測した無線端末に対する渋滞予測情報又は迂回経路情報を通知することが可能となる利点がある。   Further, based on the movement prediction information of the wireless terminal by the movement prediction function unit, the traffic congestion prediction function unit can predict the traffic route of the wireless terminal, and when the occurrence of the traffic congestion is predicted, the movement to the point There is an advantage that it is possible to notify congestion prediction information or detour route information for the predicted wireless terminal.

本発明の移動通信システムは、図１を参照すると、複数の無線基地局２−１，２−２の無線エリアを移動可能の無線端末１と、無線基地局２−１，２−２の上位の基地局制御局３とを含む移動通信システムに於いて、無線端末１は、位置情報と、移動速度と、移動方向とを含む移動情報を求めて保持する手段を備え、無線基地局２−１，２−２と基地局制御局３とを介して、無線端末１の保持している移動情報を収集する手段を含む移動予測機能部４を備え、この移動予測機能部４は、無線端末１から収集した移動情報を基に、無線端末１の移動経路を予測し、この無線端末１の移動先の無線基地局に対するリソース予約を可能とする手段を備えている。   Referring to FIG. 1, the mobile communication system of the present invention includes a wireless terminal 1 that can move in wireless areas of a plurality of wireless base stations 2-1 and 2-2, and a higher rank of the wireless base stations 2-1 and 2-2. In the mobile communication system including the base station control station 3, the wireless terminal 1 includes means for obtaining and holding movement information including position information, a movement speed, and a movement direction. The mobile prediction function unit 4 includes means for collecting the movement information held by the wireless terminal 1 via 1 and 2-2 and the base station control station 3, and the movement prediction function unit 4 includes the wireless terminal 1 1 is provided on the basis of the movement information collected from No. 1 so as to predict the movement path of the wireless terminal 1 and to reserve resources for the wireless base station to which the wireless terminal 1 is moving.

図１は、本発明の実施例１の説明図であり、１は無線端末、２−１，２−２は無線基地局、３は基地局制御局、４は移動予測機能部、５は無線端末対応の位置情報、移動速度情報、移動方向情報を保持する無線端末対応情報保持部、６は無線基地局対応のリソース等の情報を保持する無線基地局対応情報保持部、７は無線端末対応情報の要求や無線基地局対応情報取得等の判断及び制御処理を行う予測処理部を示す。なお、移動予測機能部４を構成するメモリによる無線端末対応情報保持部５と、無線基地局対応情報保持部６と、プロセッサ等による判断処理や制御処理の機能手段を、無線基地局の上位の基地局制御局３の制御処理機能の一部として構成することも可能である。   FIG. 1 is an explanatory diagram of Embodiment 1 of the present invention, where 1 is a wireless terminal, 2-1, 2-2 are wireless base stations, 3 is a base station control station, 4 is a movement prediction function unit, and 5 is wireless Wireless terminal compatible information holding unit for holding terminal-compatible position information, moving speed information, and moving direction information, 6 is a wireless base station compatible information holding unit for holding information such as resources for wireless base stations, and 7 is wireless terminal compatible A prediction processing unit that performs determination and control processing such as information request and acquisition of wireless base station correspondence information is shown. Note that the wireless terminal correspondence information holding unit 5 by the memory constituting the movement prediction function unit 4, the wireless base station correspondence information holding unit 6, and the determination processing and control processing function means by a processor or the like are provided at the upper level of the wireless base station. It is also possible to configure as part of the control processing function of the base station control station 3.

又無線端末１は、機能向上が著しく、各種のアプリケーションプログラムの実行が可能の構成が一般的となっている。又通常の無線通信の手段と共に、現在位置の位置情報の取得手段と、その位置情報の時間の経過による移動距離又は移動速度と移動方向とを求める手段とを含む構成を備えている。この位置情報の取得手段は、例えば、ＧＰＳ衛星からの電波を受信するＧＰＳユニットによる位置情報取得手段が一般的であり、携帯電話機等の無線端末に実装された構成も知られている。又無線基地局の識別情報と電波の受信電力等とよる無線基地局を基準とした位置情報取得手段等の既に知られている手段を適用することができる。又道路に沿って配置された距離ポストからの電波を受信して、基準点からの位置を識別する手段を適用することも可能である。   The wireless terminal 1 is remarkably improved in function and generally has a configuration capable of executing various application programs. In addition to the normal wireless communication means, there is provided a configuration including position information acquisition means for the current position, and means for obtaining a moving distance or moving speed and moving direction over time of the position information. As this position information acquisition means, for example, a position information acquisition means by a GPS unit that receives radio waves from a GPS satellite is generally used, and a configuration implemented in a wireless terminal such as a mobile phone is also known. Also, known means such as position information acquisition means based on the wireless base station based on the identification information of the wireless base station and the received power of the radio wave can be applied. It is also possible to apply means for receiving a radio wave from a distance post arranged along a road and identifying a position from a reference point.

又無線端末１は、現在の位置情報と、移動速度情報と、移動方向情報とを含む移動情報を保持し、通信開始時又は移動予測機能部４から基地局制御局３と無線基地局２−１，２−２を介した要求又は通知された送信条件に従って、無線端末１の識別情報と移動情報とを含む無線端末対応情報を移動予測機能部４に送信する。即ち、無線端末１の識別情報と移動情報とを含む無線端末対応情報は、移動予測機能部４に於いて、移動予測が必要の場合のみ、無線端末１から送信するものであるから、通常のトラフィックには影響を及ぼさないことになる。   The wireless terminal 1 holds movement information including the current position information, movement speed information, and movement direction information, and starts the communication from the movement prediction function unit 4 to the base station control station 3 and the wireless base station 2- The wireless terminal correspondence information including the identification information of the wireless terminal 1 and the movement information is transmitted to the movement prediction function unit 4 according to the request via 1 or 2 or the notified transmission condition. That is, since the wireless terminal correspondence information including the identification information and movement information of the wireless terminal 1 is transmitted from the wireless terminal 1 only when movement prediction is necessary in the movement prediction function unit 4, It will not affect traffic.

又移動予測機能部４は、無線基地局と通信中の無線端末１の情報を、基地局制御局３から収集し、その通信開始の無線端末１の無線端末対応情報を取得し、その無線端末対応情報を、無線端末対応情報保持部５に保持し、又無線基地局２−１，２−２の無線チャネル等のリソース使用状況を含む無線基地局対応情報を収集して、無線基地局対応情報部６に保持する。又予測処理部７は、地図情報を有し、無線端末対応情報を、通信開始の無線端末１から収集し、無線端末１の現在の位置情報と、移動速度情報と、移動方向情報とを基に、隣接した無線基地局のサービスエリアに移動するか否かを予測する。例えば、無線端末１の現在位置が、無線基地局２−１のサービスエリアのほぼ中央で、移動速度は停止状態を示す場合、その無線端末１は、隣接無線基地局のサービスエリアに移動する可能性は殆ど零であり、従って、移動通信継続時間が長い場合でも、位置情報が変化しなければ、移動情報を送信しない送信条件とすることができる。又通信中の無線端末１が移動する場合は、位置情報が変化し、移動速度も変化する場合があり、このような変化があった場合は、位置情報と移動速度情報と移動方向情報とを含む移動情報を移動予測機能部４へ送信する送信条件とする。   Further, the movement prediction function unit 4 collects information on the wireless terminal 1 in communication with the wireless base station from the base station control station 3, acquires the wireless terminal correspondence information of the wireless terminal 1 whose communication is started, and the wireless terminal Correspondence information is held in the wireless terminal correspondence information holding unit 5, and wireless base station correspondence information including resource usage statuses such as wireless channels of the wireless base stations 2-1 and 2-2 is collected to support the wireless base station. It is held in the information unit 6. The prediction processing unit 7 has map information, collects wireless terminal correspondence information from the wireless terminal 1 that has started communication, and based on the current position information, moving speed information, and moving direction information of the wireless terminal 1. Next, it is predicted whether or not to move to the service area of the adjacent radio base station. For example, when the current position of the wireless terminal 1 is approximately in the center of the service area of the wireless base station 2-1 and the moving speed indicates a stopped state, the wireless terminal 1 can move to the service area of the adjacent wireless base station. Therefore, even if the mobile communication duration is long, if the position information does not change, a transmission condition in which the mobile information is not transmitted can be set. When the wireless terminal 1 in communication moves, the position information may change and the moving speed may also change. If such a change occurs, the position information, the moving speed information, and the moving direction information are displayed. It is assumed that the movement information included is a transmission condition for transmitting to the movement prediction function unit 4.

又移動予測機能部４は、無線端末１の移動速度が高速である場合、現在の位置情報と、移動方向情報とを基に、隣接無線基地局のサービスエリアに移動可能か否かを判定し、その無線基地局のサービスエリアに移動する可能性が高い場合、その移動先の無線基地局のリソース使用状況を含む無線基地局対応情報により、移動可能性の高い無線端末に対するリソース確保を、移動先の無線基地局で実施できるように、基地局制御局３に指示する。それにより、無線端末１は、移動経路に沿った複数の無線基地局に対して順次切替接続する処理を円滑に実施することが可能となる。   The movement prediction function unit 4 determines whether or not the mobile terminal 1 can move to the service area of the adjacent radio base station based on the current position information and the movement direction information when the moving speed of the wireless terminal 1 is high. When there is a high possibility of moving to the service area of the radio base station, the radio base station correspondence information including the resource usage status of the radio base station of the move destination secures resources for radio terminals with high mobility. The base station control station 3 is instructed so that it can be implemented in the previous radio base station. As a result, the wireless terminal 1 can smoothly perform the process of sequentially switching connection to a plurality of wireless base stations along the movement route.

図２は、無線端末に於ける位置情報と移動速度情報と移動方向情報とを求める処理のフローチャートを示し、ＧＰＳやその他の手段により、無線端末の現在の位置情報取得を行い（Ａ１）、前回の位置情報と同一か否かを判定する（Ａ２）。前回の位置情報と同一の場合は、無線端末は移動していない状態であるから、この処理を終了又は最初のステップ（Ａ１）に戻るものである。又前回の位置情報と異なる場合は、無線端末が移動した場合であり、又は通信開始前は、位置情報を取得していない場合を含めると、通信開始により取得した位置情報は、前回、位置情報無しの状態であるから、前回と今回との位置情報は異なることになる。この場合の前回と今回との位置情報の差は、予め設定した値以上の場合に、移動したと判定することができる。   FIG. 2 shows a flowchart of processing for obtaining position information, moving speed information, and moving direction information in the wireless terminal, and the current position information of the wireless terminal is acquired by GPS or other means (A1). It is determined whether it is the same as the position information (A2). If the position information is the same as the previous position information, the wireless terminal is not moving, so this process ends or returns to the first step (A1). If the position information is different from the previous position information, the wireless terminal has moved, or if the position information is not acquired before the start of communication, the position information acquired by the start of communication is the previous position information. Since there is no state, the position information between the previous time and this time is different. In this case, if the difference between the previous position information and the current position information is equal to or greater than a preset value, it can be determined that the position information has moved.

前回の位置情報と今回の位置情報とが異なる場合、位置情報を基にして移動距離算出と移動方向算出とを行う（Ａ３）。この算出した移動距離と前回と今回との間の時間情報を基に移動速度を算出し（Ａ４）、移動速度と移動方向との移動情報が前回と異なるか否かを判定する（Ａ５）。前回の移動情報と今回の移動情報とが同一の場合、位置情報のみが変化した場合で、同一速度で同一方向に移動している場合であって、この位置情報のみを更新する（Ａ８）。又移動情報が異なる場合は、位置情報と移動距離と移動方向とを無線基地局を介して移動予測機能部４に送信する（Ａ６）。そして、送信した内容をセーブする（Ａ７）。なお、この場合の移動距離の情報を、ステップ（Ａ４）に於いて算出した移動速度の情報とすることができる。   If the previous position information is different from the current position information, the movement distance and the movement direction are calculated based on the position information (A3). A moving speed is calculated based on the calculated moving distance and time information between the previous time and the current time (A4), and it is determined whether the moving information between the moving speed and the moving direction is different from the previous time (A5). When the previous movement information and the current movement information are the same, only the position information is changed, and the movement information is moving in the same direction at the same speed, and only this position information is updated (A8). If the movement information is different, the position information, the movement distance, and the movement direction are transmitted to the movement prediction function unit 4 via the radio base station (A6). Then, the transmitted content is saved (A7). Note that the information on the moving distance in this case can be the information on the moving speed calculated in step (A4).

図３は、移動予測機能部の処理を示すフローチャートであり、無線端末からの移動情報を取得すると（Ｂ１）、この移動情報としての位置情報と移動方向情報と移動距離情報とを基に移動経路予測を行う（Ｂ２）。その場合に、移動経路の予測ができない時は、無線端末に対して、移動情報の継続送信を要求し（Ｂ６）、この処理を終了し、移動情報取得のステップ（Ｂ１）に移行する。又ステップ（Ｂ２）に於いて移動経路の予測ができた時は、無線基地局の切替えを予測し（Ｂ３）、無線基地局の切替えによる移動先無線基地局に於けるリソース不足が予測されるか否かを判定する（Ｂ４）。この移動先無線基地局と通信中の無線端末が少なく、リソース不足が発生しないと予測できた時は、この処理を終了し、リソース不足が予測される場合は、移動先の無線基地局のリソース予約が必要であることを基地局制御局に通知して（Ｂ５）、この処理を終了する。   FIG. 3 is a flowchart showing the process of the movement prediction function unit. When movement information from a wireless terminal is acquired (B1), the movement route is based on position information, movement direction information, and movement distance information as the movement information. Prediction is performed (B2). In this case, when the movement route cannot be predicted, the wireless terminal is requested to continue transmission of movement information (B6), the process is terminated, and the process proceeds to the movement information acquisition step (B1). When the movement path can be predicted in step (B2), the switching of the radio base station is predicted (B3), and the shortage of resources in the destination radio base station due to the radio base station switching is predicted. (B4). When it is predicted that there will be no shortage of resources and there are few radio terminals communicating with this destination radio base station, this process is terminated, and if the resource shortage is predicted, the resources of the destination radio base station The base station control station is notified that reservation is necessary (B5), and this process is terminated.

図４は、無線端末の移動経路の予測説明図であり、無線端末（乗用車等の道路走行車両に搭載）が移動すると予想される経路が、例えば、経路１、経路２として示すように複数存在する場合、移動経路を特定する為には、継続して無線端末の移動情報が必要となる。そして、経路１に沿った移動が予測された場合は、無線エリアＡ、Ｂ、Ｃを通過することになるから、無線端末の位置情報に従って、無線エリアＡから無線エリアＣに移動する前に、無線基地局Ｃに於けるリソース不足が予測されるか否かを判定し、リソース不足が予測される場合は、無線基地局Ｃに於けるリソース予約が必要であることを、基地局制御局に通知し、基地局制御局から無線基地局Ｃに対して、リソース予約を通知する。それにより、無線端末は、無線エリアＡから無線エリアＣに移動しても通信を継続することが可能となる。   FIG. 4 is a prediction explanatory diagram of the movement route of the wireless terminal, and there are a plurality of routes that the wireless terminal (mounted on a road vehicle such as a passenger car) is expected to move, as shown as route 1 and route 2, for example. In order to specify the movement route, the movement information of the wireless terminal is required continuously. And when movement along the route 1 is predicted, it will pass through the wireless areas A, B, C, so before moving from the wireless area A to the wireless area C according to the position information of the wireless terminal, It is determined whether or not a resource shortage at the radio base station C is predicted, and if a resource shortage is predicted, the base station controller determines that resource reservation at the radio base station C is necessary. The base station control station notifies the radio base station C of the resource reservation. As a result, the wireless terminal can continue communication even after moving from the wireless area A to the wireless area C.

又経路２に沿った移動が予測された場合は、無線エリアＣを通過しないので、無線エリアＡから無線エリアＢに移動する前に、前述の場合と同様に、無線基地局Ｂに於けるリソース不足が予測されるか否かを判定し、リソース不足が予測される場合は、前述の場合と同様に、無線基地局Ｂに於けるリソースを確保し、又リソース不足が予測されない場合は、そのままとする。従って、経路２に沿って移動する場合も、無線端末は、無線エリアＡから通信しながら無線エリアＢを移動することが可能となる。   If movement along the route 2 is predicted, the wireless area C does not pass through, and therefore, before moving from the wireless area A to the wireless area B, the resources in the wireless base station B are the same as described above. It is determined whether or not a shortage is predicted, and if a shortage of resources is predicted, as in the case described above, resources are secured in the radio base station B, and if a shortage of resources is not predicted, And Accordingly, even when moving along the route 2, the wireless terminal can move in the wireless area B while communicating from the wireless area A.

図５は、本発明の実施例２の説明図であり、図１と同一符号は同一名称部分を示し、８は渋滞予測機能部、９は交通量検出システムを示す。移動予測機能部４は、前述のように、無線端末対応情報保持部５と、無線基地局対応情報保持部６と、予測処理部７とを含む構成を有し、無線端末１の移動情報を収集して、移動経路予測を行うものである。又交通量検出システム９は、既に実用化されている高速道路等の幹線道路の交通量を検出するシステムに相当し、又渋滞予測機能部８は、移動予測機能部４からの無線端末１の移動情報と、交通量検出システム９からの交通量情報とを基に、渋滞発生予測を行うものである。この渋滞予測機能部８により、渋滞が予測された地点に向かう無線端末に対して、例えば、渋滞予測情報を通知し、又渋滞予測地点を迂回できる経路がある場合は、迂回経路情報を通知する。なお、交通量検出システム９の交通量情報は、専用のネットワーク又は汎用のネットワークを介して、渋滞予測機能部８に転送することができるものであり、又渋滞予測機能部８が必要に応じて、予測判定する範囲内の交通量情報を、交通量検出システム９に要求する構成とすることもできる。又渋滞予測機能部８と移動予測機能部４との主要部を共通化し、且つ基地局制御局３に設けることも可能である。   FIG. 5 is an explanatory diagram of Embodiment 2 of the present invention, where the same reference numerals as those in FIG. 1 denote the same name parts, 8 denotes a traffic jam prediction function unit, and 9 denotes a traffic volume detection system. As described above, the movement prediction function unit 4 has a configuration including the wireless terminal correspondence information holding unit 5, the wireless base station correspondence information holding unit 6, and the prediction processing unit 7. It collects and performs movement route prediction. The traffic volume detection system 9 corresponds to a system for detecting the traffic volume of an arterial road such as an expressway that has already been put into practical use. The traffic congestion prediction function unit 8 is a function of the wireless terminal 1 from the movement prediction function unit 4. Based on the movement information and the traffic volume information from the traffic volume detection system 9, the occurrence of traffic jam is predicted. By this traffic jam prediction function unit 8, for example, traffic jam prediction information is notified to a wireless terminal heading to a location where traffic jam is predicted, and when there is a route that can bypass the traffic jam prediction point, the bypass route information is notified. . The traffic volume information of the traffic volume detection system 9 can be transferred to the traffic jam prediction function unit 8 via a dedicated network or a general-purpose network. The traffic volume information within the prediction determination range may be requested to the traffic volume detection system 9. It is also possible to make the main part of the traffic jam prediction function unit 8 and the movement prediction function unit 4 in common and to be provided in the base station control station 3.

図６は、本発明の実施例２の渋滞予測機能部のフローチャートであり、交通量検出システム９からの交通量情報、又は移動予測機能部４からの無線端末１の移動情報を基に、或る地点の通行車両数が、速度低下により渋滞が発生すると予想される台数に達したか否かを判定し（Ｃ１）、予想台数に達していない場合は、処理を終了し、又予想台数に達した場合は、移動予測機能部４に対して、無線基地局のエリア内に移動した無線端末の移動情報通知条件を送信するように要求する（Ｃ２）。例えば、無線端末１の移動速度が５０ｋｍ／ｈ以下に低下した場合に、その無線端末は、移動情報を送信する条件を通知する。   FIG. 6 is a flowchart of the traffic jam prediction function unit according to the second embodiment of the present invention, based on the traffic volume information from the traffic volume detection system 9 or the movement information of the wireless terminal 1 from the movement prediction function unit 4 or It is determined whether or not the number of vehicles passing the vehicle has reached the number that is expected to cause traffic congestion due to a decrease in speed (C1). If it has been reached, it requests the movement prediction function unit 4 to transmit the movement information notification condition of the wireless terminal that has moved into the area of the wireless base station (C2). For example, when the moving speed of the wireless terminal 1 is reduced to 50 km / h or less, the wireless terminal notifies the condition for transmitting the movement information.

それにより、渋滞予測機能部８は、移動速度が低下した無線端末からの移動情報を受信収集し（Ｃ３）、移動速度が低下した無線端末数、即ち、速度低下の車両数が予め設定した台数を超えたか否か、即ち、渋滞が予測されるか否かを判定し（Ｃ４）、渋滞が予測されない場合は、ステップ（Ｃ３）に移行し、速度低下の車両数が予め設定した台数を超えた場合は、渋滞発生を予測し（Ｃ５）、前述のように、渋滞予測情報又は迂回経路情報を、渋滞発生予測地点に向かう無線端末に対して通知する。   Thereby, the traffic jam prediction function unit 8 receives and collects movement information from the wireless terminals whose movement speed has decreased (C3), and the number of wireless terminals whose movement speed has decreased, that is, the number of vehicles whose speed reduction has been set in advance. It is determined whether or not a traffic jam is predicted, that is, whether or not a traffic jam is predicted (C4). If a traffic jam is not predicted, the process proceeds to step (C3), and the number of vehicles whose speed decreases exceeds a preset number. If the traffic jam occurs, the occurrence of the traffic jam is predicted (C5), and as described above, the traffic jam prediction information or the detour route information is notified to the wireless terminal heading for the traffic jam occurrence predicted point.

図７は、移動経路の説明図であり、無線基地局Ａ，Ｂ，Ｃのそれぞれの無線エリアＡ，Ｂ，Ｃと、経路１，２とについて示すもので、道路走行中の１台の車両の速度低下を要因として、後続の複数の車両の速度低下を誘引し、特に、経路１，２の合流地点に於ける渋滞状態を引き起こすことになる。そこで、或る地点の所定の範囲内、例えば、前述の合流地点の前方の所定の距離範囲内に於ける複数車両の速度低下を、無線端末の移動情報を基に検出する。それによって、前述のように、合流地点に向かう車両の渋滞を予測することができる。渋滞予測によって、迂回路情報を通知して、実際の渋滞発生を回避することも可能となる。又無線端末に対する移動情報の送信要求は、渋滞予測を行う場合であり、従って、トラフィック増大のおそれは発生しない。   FIG. 7 is an explanatory diagram of the moving route, showing the wireless areas A, B, and C of the wireless base stations A, B, and C, and the routes 1 and 2, respectively. This causes a decrease in the speed of a plurality of subsequent vehicles due to the decrease in the speed of the vehicle, and in particular causes a traffic jam at the junction of the routes 1 and 2. Therefore, a decrease in speed of a plurality of vehicles within a predetermined range at a certain point, for example, within a predetermined distance range in front of the above-described junction point is detected based on the movement information of the wireless terminal. Thereby, as described above, it is possible to predict the traffic jam of the vehicle heading to the meeting point. It is possible to notify the detour information by the traffic jam prediction and to avoid the actual traffic jam occurrence. Further, the movement information transmission request to the wireless terminal is a case where a traffic jam is predicted, and therefore there is no fear of increasing traffic.

本発明の実施例１の説明図である。It is explanatory drawing of Example 1 of this invention. 本発明の実施例１の無線端末のフローチャートである。It is a flowchart of the radio | wireless terminal of Example 1 of this invention. 本発明の実施例１の移動予測機能部のフローチャートである。It is a flowchart of the movement prediction function part of Example 1 of this invention. 本発明の実施例１の移動経路の予測説明図である。It is prediction explanatory drawing of the movement path | route of Example 1 of this invention. 本発明の実施例２の説明図である。It is explanatory drawing of Example 2 of this invention. 本発明の実施例２の渋滞予測機能部のフローチャートである。It is a flowchart of the traffic congestion prediction function part of Example 2 of this invention. 本発明の実施例２の移動経路の説明図である。It is explanatory drawing of the movement path | route of Example 2 of this invention.

符号の説明Explanation of symbols

１ 無線端末
２−１，２−２ 無線基地局
３ 基地局制御局
４ 移動予測機能部
５ 無線端末対応情報保持部
６ 無線基地局対応情報保持部
７ 予測処理部 DESCRIPTION OF SYMBOLS 1 Wireless terminal 2-1 and 2-2 Wireless base station 3 Base station control station 4 Movement prediction function part 5 Wireless terminal corresponding | compatible information holding part 6 Wireless base station corresponding | compatible information holding part 7 Prediction processing part

Claims (8)

無線端末の現在位置を示す位置情報と、前記無線端末の移動速度情報と、前記無線端末の移動方向情報とを含む移動情報を求めて保持する無線端末と、
前記無線端末の前記移動情報を継続して収集することにより前記無線端末の移動経路を予測する移動予測機能部を備え、
前記移動予測機能部が予測する前記移動経路上にあって前記無線端末の移動先と予測される無線基地局が、前記移動先と予測される無線基地局に於けるリソース使用状況に基づいて前記無線端末に対するリソースを予約する
ことを特徴とする移動通信システム。 A wireless terminal that obtains and holds movement information including position information indicating a current position of the wireless terminal, movement speed information of the wireless terminal, and movement direction information of the wireless terminal;
A movement prediction function unit that predicts a movement route of the wireless terminal by continuously collecting the movement information of the wireless terminal ;
A radio base station that is on the movement path predicted by the movement prediction function unit and is predicted to be the destination of the wireless terminal is based on the resource usage status in the radio base station that is predicted to be the destination. A mobile communication system, wherein a resource for a radio terminal is reserved . 前記無線端末は、前記移動予測機能部からの送信要求又は送信条件指示に従って、保持している前記移動情報を前記移動予測機能部へ送信する構成を備えたことを特徴とする請求項１記載の移動通信システム。 The said wireless terminal is equipped with the structure which transmits the said movement information currently hold | maintained to the said movement prediction function part according to the transmission request or transmission condition instruction | indication from the said movement prediction function part. Mobile communication system. 前記移動予測機能部は、前記無線端末からの移動情報を予測できない時に該無線端末に継続して移動情報送信を指示し、移動経路を予測した時は、該移動経路に沿った移動先の無線基地局がリソース不足の時に、リソース予約を前記無線基地局の上位局である基地局制御局に通知する構成を備えたことを特徴とする請求項１記載の移動通信システム。 The movement prediction function unit, said continue to the wireless terminal tells the movement information transmitted when the unpredictable movement information from the wireless terminal, when the predicted moving path, the destination radio along the travel path The mobile communication system according to claim 1, further comprising a configuration for notifying a resource reservation to a base station control station that is a higher-order station of the radio base station when the base station is short of resources. 前記移動予測機能部に於いて収集した前記無線端末の移動情報に含まれる前記移動速度情報と前記移動方向情報とに基づいて、所定の速度以下に低下した同一の移動方向の無線端末数が所定数を超えたかを判定して前記無線端末の移動方向の渋滞予測を行う渋滞予測機能部を備えたことを特徴とする請求項１記載の移動通信システム。 Based on the movement speed information and the movement direction information included in the movement information of the wireless terminals collected by the movement prediction function unit, the number of wireless terminals in the same movement direction that have fallen below a predetermined speed is predetermined. The mobile communication system according to claim 1, further comprising a traffic jam prediction function unit that judges whether or not the number exceeds a traffic jam in the moving direction of the wireless terminal. 前記渋滞予測機能部は、前記無線端末の移動方向の渋滞予測により、前記無線端末に渋滞予測情報又は迂回経路情報を通知する構成を備えたことを特徴とする請求項４記載の移動通信システム。   5. The mobile communication system according to claim 4, wherein the traffic jam prediction function unit is configured to notify the radio terminal of traffic jam prediction information or detour route information based on traffic jam prediction in the movement direction of the radio terminal. 前記移動予測機能部は、前記移動先と予測される無線基地局に於けるリソース使用状況を示すリソース使用状況情報を継続して収集し、前記リソース使用状況情報に基づいて前記移動先と予測される無線基地局に於けるリソース不足を推定する構成を備えたことを特徴とする請求項１記載の移動通信システム。The movement prediction function unit continuously collects resource usage status information indicating a resource usage status in the radio base station predicted to be the destination, and is predicted as the destination based on the resource usage status information. The mobile communication system according to claim 1, further comprising a configuration for estimating a shortage of resources in a wireless base station. 前記移動予測機能部は、前記移動先と予測される無線基地局に於けるリソース不足と予測される場合に、前記移動先と予測される無線基地局は前記無線端末に対するリソースを予約する構成を備えたことを特徴とする請求項６記載の移動通信システム。The movement prediction function unit is configured to reserve a resource for the wireless terminal when the wireless base station predicted to be the movement destination is predicted to have a shortage of resources in the wireless base station predicted to be the movement destination. The mobile communication system according to claim 6, further comprising: 前記移動予測機能部は、前記移動先と予測される無線基地局に於いてリソース不足と予測される場合に、前記移動先と予測される無線基地局に対して、前記無線端末に対するリソースを予約することを通知することを特徴とする請求項７記載の移動通信システム。The movement prediction function unit reserves a resource for the wireless terminal to the wireless base station predicted to be the movement destination when a shortage of resources is predicted in the wireless base station predicted to be the movement destination. 8. The mobile communication system according to claim 7, wherein the mobile communication system is notified.
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