JP3376444B2 - Base station apparatus and timing adjustment method for wireless communication system - Google Patents
Base station apparatus and timing adjustment method for wireless communication systemInfo
- Publication number
- JP3376444B2 JP3376444B2 JP2000206110A JP2000206110A JP3376444B2 JP 3376444 B2 JP3376444 B2 JP 3376444B2 JP 2000206110 A JP2000206110 A JP 2000206110A JP 2000206110 A JP2000206110 A JP 2000206110A JP 3376444 B2 JP3376444 B2 JP 3376444B2
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- Prior art keywords
- base station
- frame
- delay
- station device
- route
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Small-Scale Networks (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一つの本部局装置
にツリー状に接続された複数の基地局装置を有する無線
通信システムにおいて、複局同時送受信を可能とする基
地局装置及びタイミング調整方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base station apparatus and a timing adjusting method capable of performing multi-station simultaneous transmission / reception in a radio communication system having a plurality of base station apparatuses connected in a tree form to one head office apparatus. It is about.
【０００２】[0002]
【従来の技術】一つの本部局装置にツリー状にリンク接
続された複数の基地局装置から同時刻に無線信号を送信
する複局同時送信を可能とする場合、ＧＰＳ（Global P
ositioning System ）の時刻に同期させて送信する方法
がある（例えば、特開平８−３０７９３２号公報）。2. Description of the Related Art In the case of enabling multi-station simultaneous transmission in which radio signals are transmitted at the same time from a plurality of base station devices linked in a tree form to one central station device, GPS (Global P
ositioning System), and there is a method of transmitting in synchronization with the time (for example, Japanese Patent Laid-Open No. 8-307932).
【０００３】また、一つの移動局装置から発信された電
波を複数の基地局装置で受信する場合、リンク間の上り
伝送遅延を制御することによって、複数の基地局装置に
よるダイバーシチ受信（サイトダイバーシチ）を可能と
することができる。Further, when a plurality of base station devices receive radio waves transmitted from one mobile station device, by controlling uplink transmission delay between links, a plurality of base station devices receive diversity (site diversity). Can be possible.
【０００４】なお、ここでいうツリー状とは、本部局装
置を最上位とする有階位網であり、ある基地局装置に着
目した場合、その上位局は１つであるのに対し、下位局
はｎ（１≦ｎ）局あり、下位方路にのみ分岐が可能な網
をいう。[0006] The tree-like structure mentioned here is a stepped network in which the headquarter station device is at the top, and when a certain base station device is focused on, there is only one higher station, but there is a lower station. There are n (1 ≦ n) stations, which means a network that can branch only to lower routes.
【０００５】[0005]
【発明が解決しようとする課題】しかし、従来のよう
に、ＧＰＳ時刻に従属同期して無線送信する場合、ＧＰ
Ｓ時刻と同じ１秒周期のパルス信号を基地局装置内で発
生させる必要があり、相応のＧＰＳ観測時間や同期維持
手段が必要であった。However, in the case of wireless transmission in the subordinate synchronization with GPS time as in the conventional case, GP is used.
It was necessary to generate a pulse signal with the same one second period as the S time in the base station device, and a corresponding GPS observation time and synchronization maintaining means were required.
【０００６】また、複局同時受信によるサイトダイバー
シチを行うにあたり、スター型の上り回線のタイミング
の補正方法をそのままツリー状でトーナメント方式を行
うシステムに適用すると、余計な処理時間を生じたり、
基地局装置の増設やリンク回線の経路変更の際に、基地
局装置の配置や遅延時間が大きく変化した場合、多大な
設定コストを生じるという課題があった。Further, when performing site diversity by simultaneous reception of multiple stations, if the star-type uplink timing correction method is directly applied to a system which performs a tournament system in a tree form, an extra processing time may occur.
There has been a problem in that, when the base station device is added or the route of the link line is changed, when the arrangement of the base station device or the delay time is changed significantly, a large setting cost is generated.
【０００７】また、基地局装置をツリー状に接続するシ
ステムでは、下りは分配するだけでよいが、上りは方路
がトーナメント式に絞られるため、もし移動局装置から
送信された上りフレームが複数存在した場合、多重化で
きなければどの方路から到達した上りフレームを上位局
に中継するかを選択する必要があるが、このとき少しで
も先に到達した上りフレームを選択して中継する方法で
は、本部局装置に近い基地局装置で受信した上りフレー
ムの方が中継されやすくなるため、下位局でより良好な
状態で受信された上りフレームを本部局へ中継できなく
なるという課題があった。Further, in the system in which the base station devices are connected in a tree form, it is only necessary to distribute the downlink, but since the route is narrowed down to the tournament type in the uplink, if the uplink frames transmitted from the mobile station device are plural. If it exists, if it cannot be multiplexed, it is necessary to select from which route the upstream frame that arrives is relayed to the upper station. The uplink frame received by the base station device closer to the head office device is more likely to be relayed, so that there is a problem that the uplink frame received by the lower station in a better state cannot be relayed to the head office station.
【０００８】本発明は、このような従来の課題を解決す
るためになされたもので、複局同時送受信を実現するう
えで、基地局装置間のタイミング調整を自動化し、定期
的なタイミング補正や基地局装置の増設を容易にすると
共に、良好な回線品質を確立することができる無線通信
システムの基地局装置及びタイミング調整方法を提供す
るものである。The present invention has been made in order to solve such a conventional problem. In order to realize multi-station simultaneous transmission / reception, timing adjustment between base station devices is automated, and periodic timing correction and The present invention provides a base station device and a timing adjustment method for a wireless communication system that can easily add a base station device and establish good line quality.
【０００９】[0009]
【課題を解決するための手段】本発明の無線通信システ
ムの基地局装置は、本部局装置とツリー状に接続された
複数の基地局装置間で一定周期のフレーム単位でディジ
タル信号を伝送する無線通信システムにおいて、本部局
装置と基地局装置は、無線通信システム全てに対し同時
刻を認識できる信号を受信する基準信号受信手段と、無
線送信タイミング算出手段と、無線送信遅延手段と、無
線送信手段とを備え、無線送信タイミング算出手段は、
基準信号受信手段から得られた基準信号と本部局装置か
ら送出される下りフレームの到達時間の差を測定して本
部局装置へ通知し、本部局装置から報知される時間差の
最大値以上の一定値から測定した時間差を減じた値を送
信遅延手段における遅延時間とすることで、無線送信手
段が複局同時送信を行う構成を有する。A base station apparatus of a wireless communication system of the present invention is a radio station that transmits a digital signal in frame units of a fixed cycle between a base station apparatus and a plurality of base station apparatuses connected in a tree shape. In the communication system, the head office device and the base station device receive a reference signal receiving unit that receives a signal capable of recognizing the same time for all wireless communication systems, a wireless transmission timing calculation unit, a wireless transmission delay unit, and a wireless transmission unit. And the wireless transmission timing calculation means,
The difference between the arrival time of the reference signal obtained from the reference signal receiving means and the downlink frame transmitted from the head office device is measured and notified to the head office device, and the time difference is not less than the maximum value notified by the head office device. The value obtained by subtracting the measured time difference from the value is used as the delay time in the transmission delay means, and the wireless transmission means performs the multi-station simultaneous transmission.
【００１０】この構成により、各基地局装置は本部局装
置から一斉通知された最大遅延時間から自局の遅延時間
を減じた値を自局の遅延時間と設定することにより、本
部局装置から送出された下りフレームを、この遅延時間
分遅延させた後に無線送信することで全ての基地局装置
から同時刻に送信する複局同時送信を行うことができる
こととなる。With this configuration, each base station device sets the value obtained by subtracting the delay time of its own station from the maximum delay time notified by the head station device at the same time as the delay time of its own station, so that the base station device sends it. By delaying the generated downlink frame by this delay time and then wirelessly transmitting the same, it is possible to perform multi-station simultaneous transmission in which all base station devices transmit at the same time.
【００１１】本発明の無線通信システムの基地局装置
は、本部局装置とツリー状に接続された複数の基地局装
置間で一定周期のフレーム単位でディジタル信号を伝送
する無線通信システムにおいて、基地局装置は、移動局
装置からの電波を受信する無線受信手段と、無線送受信
手段からの受信方路および下位局が接続されている下位
方路からの上りフレームを各方路別に遅延制御する遅延
補正手段と、各方路からの上りフレームタイミングを同
期させるために遅延補正手段の遅延時間を制御するフレ
ーム同期比較手段と、遅延補正手段で遅延した各方路の
フレームを選択して上位局に転送する方路選択手段とを
備え、移動局装置の送信波が複数の基地局装置で同時に
受信された場合に、その複数の上りフレームが下位方路
のある基地局装置において合流時にタイミングを揃える
ことで複局同時受信を行う構成を有する。A base station device of a wireless communication system of the present invention is a base station device in which a digital signal is transmitted in frame units of a fixed cycle between a base station device and a plurality of base station devices connected in a tree shape. The device is a wireless receiver that receives radio waves from a mobile station device, and a delay correction that delay-controls an upstream frame from each of the routes received from the wireless transceiver and the lower route to which the lower station is connected. Means, a frame synchronization comparing means for controlling the delay time of the delay correcting means in order to synchronize the upstream frame timing from each route, and the frame of each route delayed by the delay correcting means is selected and transferred to the upper station. When the transmission wave of the mobile station device is simultaneously received by a plurality of base station devices, the plurality of uplink frames are transmitted to the base station device having a lower route. Having a configuration in which multiple stations simultaneously received by aligning the timing at confluence with are.
【００１２】この構成により、移動局装置の送信波が複
数の基地局装置で同時に受信された場合に、その複数の
上りフレームが下位方路のある基地局装置において合流
時にタイミングを揃えることで複局同時受信が実現でき
ることとなる。With this configuration, when the transmission waves of the mobile station device are simultaneously received by a plurality of base station devices, the plurality of upstream frames are duplicated in the base station device having a lower route by aligning the timings when they join. Simultaneous station reception can be realized.
【００１３】本発明の無線通信システムのタイミング調
整方法は、本部局装置とツリー状に接続された複数の基
地局装置間で一定周期のフレーム単位でディジタル信号
を伝送する無線通信システムにおいて、複数の基地局装
置はそれぞれ任意の基準時刻と下りフレーム到着時刻と
の時間差を測定し、複数の基地局装置のなかで下位方路
のない基地局装置は測定した時間差を遅延情報として本
部局装置に通知し、本部局装置は通知された遅延情報の
なかの最大値を複数の基地局装置へ報知し、複数の基地
局装置は報知された遅延情報の最大値から自局で測定し
た時間差を減じた値を無線送信遅延時間としてそれぞれ
設定し、複数の基地局装置は本部局装置から送出された
フレームを無線送信遅延時間分遅延させた後に送信する
ことで複局同時送信を行うものである。A timing adjusting method for a wireless communication system according to the present invention is a method for transmitting a digital signal in a frame unit of a constant cycle between a base station device and a plurality of base station devices connected in a tree structure. Each of the base station devices measures the time difference between the arbitrary reference time and the arrival time of the downlink frame, and among the plurality of base station devices, the base station device that has no lower route notifies the main station device of the measured time difference as delay information. However, the head office device notifies the maximum value of the notified delay information to the plurality of base station devices, and the plurality of base station devices subtracts the time difference measured at the own station from the maximum value of the notified delay information. A value is set for each wireless transmission delay time, and multiple base station devices transmit multiple frames simultaneously by delaying the frame sent from the central station device by the wireless transmission delay time. And performs.
【００１４】この方法により、各基地局装置は本部局装
置から一斉通知された遅延情報の最大値から自局の遅延
時間を減じた値を自局の遅延時間と設定することによ
り、本部局装置から送出された下りフレームを、この遅
延時間分遅延させた後に無線送信するので、全ての基地
局装置から同時刻に送信できる複局同時送信ができるこ
ととなる。According to this method, each base station apparatus sets the value obtained by subtracting the delay time of its own station from the maximum value of the delay information notified from the head station apparatus at the same time as the delay time of its own station. Since the downlink frame transmitted from the base station device is delayed by this delay time and then wirelessly transmitted, it is possible to perform multi-station simultaneous transmission in which all base station devices can transmit at the same time.
【００１５】本発明の無線通信システムのタイミング調
整方法は、下位方路のない基地局装置が本部局装置に遅
延情報を通知する際に、遅延情報に自局の基地局ＩＤを
付加して上位方路に転送し、下位方路を有する基地局装
置は下位方路のない基地局装置から基地局ＩＤ付き遅延
情報を受けると、これらに自局の基地局ＩＤを付加して
上位方路に転送するものである。According to the timing adjusting method of the wireless communication system of the present invention, when the base station device having no lower path notifies the headquarters device of the delay information, the base station ID of its own station is added to the delay information and the higher order is added. When the base station device having a lower route receives the delay information with the base station ID from the base station device having no lower route, the base station ID of its own station is added to the base station device to the upper route. It is to be transferred.
【００１６】この方法により、本部局装置が遅延情報を
得る際に、同時に基地局装置のトポロジーを認識するこ
とが可能となる。By this method, it becomes possible to recognize the topology of the base station device at the same time when the head office device obtains the delay information.
【００１７】本発明の無線通信システムのタイミング調
整方法は、複数の基地局装置はＧＰＳから得られた位置
情報を自局の基地局ＩＤと共に遅延情報に付加して本部
局装置へ転送し、本部局装置は地図データと照合するこ
とにより、地理的な位置関係も含めた接続状態図を構築
するものである。In the method for adjusting the timing of the wireless communication system of the present invention, the plurality of base station devices add the position information obtained from GPS to the delay information together with the base station ID of the own station and transfer it to the head office device. The station device collates with the map data to build a connection state diagram including a geographical positional relationship.
【００１８】この方法により、各基地局装置は本部局装
置に通知する遅延情報にＧＰＳの位置情報を加えて送る
ことにより、本部局装置は地理的な位置関係も含めた接
続状態を認識することができることとなる。According to this method, each base station device sends the delay information notified to the head office device together with the GPS position information so that the head office device recognizes the connection state including the geographical positional relationship. Will be possible.
【００１９】本発明の無線通信システムのタイミング調
整方法は、本部局装置とツリー状に接続された複数の基
地局装置間で一定周期のフレーム単位でディジタル信号
を伝送する無線通信システムにおいて、下位方路を有す
る基地局装置は各下位方路および自局の無線受信手段で
受信した上りフレームタイミングおよびそのフレーム番
号を比較し、同一のフレーム番号のフレームタイミング
が一致するように各下位方路に設けた遅延補正手段を調
整し、任意または予め優先度を定めた方路の上りフレー
ムを選択して上位局に中継することで複局同時受信を行
う。A timing adjusting method for a wireless communication system according to the present invention is a wireless communication system for transmitting a digital signal in frame units of a constant cycle between a head office device and a plurality of base station devices connected in a tree structure. The base station device having a path compares the upstream frame timing received by the radio receiving means of each lower path and its own station and its frame number, and is provided in each lower path so that the frame timings of the same frame number match. The multi-station simultaneous reception is performed by adjusting the delay correction means and selecting an upstream frame of an arbitrary or a route whose priority is set in advance and relaying it to the upper station.
【００２０】この方法により、複数の基地局装置で移動
局装置の送信波が受信された場合、その上りフレームが
本部局装置に到達するまでにタイミングを揃えられるた
め、複局同時受信が実現することとなる。According to this method, when the transmission waves of the mobile station apparatus are received by the plurality of base station apparatuses, the timings can be aligned before the upstream frames reach the headquarters station apparatus, so that multi-station simultaneous reception is realized. It will be.
【００２１】本発明の無線通信システムのタイミング調
整方法は、下位方路からの上りフレームと自局の無線受
信手段で受信したフレームとを比較して選択する際に、
回線品質が最良と推定された方路の上りフレームを上位
局に中継するものである。The timing adjusting method of the wireless communication system of the present invention compares the upstream frame from the lower route with the frame received by the wireless receiving means of the local station, and selects the frame.
It relays the upstream frame of the route estimated to have the best channel quality to the upper station.
【００２２】この方法により、複局同時受信が可能な状
態において、受信した基地局装置が上りフレームに受信
品質情報を付加し、上りフレームに含まれる受信品質情
報を比較して受信品質の良い上りフレームを選択し、上
位局に中継することで、ある移動局装置からの送信波が
複数の基地局装置で同時に受信された場合に、より受信
品質の良い基地局装置で受信した上りフレームが自動的
に選ばれるサイトダイバーシチが可能となるものであ
る。According to this method, in the state where multi-station simultaneous reception is possible, the received base station device adds the reception quality information to the upstream frame, compares the reception quality information contained in the upstream frame, and receives the upstream signal with good reception quality. By selecting a frame and relaying it to the upper station, when the transmission wave from a certain mobile station device is received by multiple base station devices at the same time, the uplink frame received by the base station device with better reception quality is automatically The site diversity that is specifically selected becomes possible.
【００２３】[0023]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図面を用いて説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００２４】（実施の形態１）図１は、本発明が適用さ
れる無線通信システムの構成図で、一つの本部局装置１
に複数の基地局装置２〜７が専用のディジタルリンク回
線によりツリー状に接続された構成を示している。ま
た、基地局装置２〜７は移動局装置８〜９との間で無線
交信を行うための無線送受信手段を備えており、本部局
装置１および基地局装置２〜７はＧＰＳ衛星装置１０か
らの電波を受信するＧＰＳ受信手段を備えている。そし
て、通信方式として一定周期のフレーム単位でディジタ
ル信号を伝送するＴＤＭＡ（Time Division Multiple A
ccess ）方式を用いている。(Embodiment 1) FIG. 1 is a block diagram of a radio communication system to which the present invention is applied.
2 shows a configuration in which a plurality of base station devices 2 to 7 are connected in a tree shape by a dedicated digital link line. In addition, the base station devices 2 to 7 are provided with a wireless transmission / reception means for performing wireless communication with the mobile station devices 8 to 9, and the head office device 1 and the base station devices 2 to 7 are connected to the GPS satellite device 10. It is equipped with a GPS receiving means for receiving the radio waves. Then, as a communication method, a TDMA (Time Division Multiple A) that transmits a digital signal in frame units with a constant cycle is used.
ccess) method is used.
【００２５】また、この無線通信システムは、具体的に
は本部局装置１の下位に基地局装置２および基地局装置
７が接続され、基地局装置２の下位に基地局装置３およ
び基地局装置６が接続され、基地局装置３の下位に基地
局装置４および基地局装置５が接続されている。各基地
局装置を結ぶリンク回線は上位局に対する従属同期（こ
れを網同期という）とし、リンク回線による伝送遅延に
ついては網同期後は変動しないものとする。In this radio communication system, specifically, the base station device 2 and the base station device 7 are connected to the subordinate of the head office device 1, and the base station device 3 and the base station device are subordinate to the base station device 2. 6 is connected, and the base station device 4 and the base station device 5 are connected below the base station device 3. It is assumed that the link line connecting each base station device is dependent synchronization with the upper station (this is called network synchronization), and the transmission delay by the link line does not change after network synchronization.
【００２６】また、基地局装置２〜７および移動局装置
８〜９間の下り無線回線周波数にはＦ１、上り無線回線
周波数にはＦ２が割当てられており、下りＦ１に同期し
て上りＦ２が送信される。上りおよび下り回線の信号は
フレーム単位で連続的に伝送され、無線送受信手段にお
いては下りフレームに同期して上りフレームが送出され
る。なお、基地局リンク間の上下方向のフレーム同期は
既に確立（下りおよび上り回線の伝送フレームのビット
内容が読み出せる状態をさす）しているものとする。Further, F1 is assigned to the downlink radio line frequency and F2 is assigned to the uplink radio line frequency between the base station devices 2 to 7 and the mobile station devices 8 to 9, and the uplink F2 is synchronized with the downlink F1. Sent. Uplink and downlink signals are continuously transmitted on a frame-by-frame basis, and an uplink frame is transmitted in synchronization with the downlink frame in the wireless transmission / reception means. It is assumed that vertical frame synchronization between base station links has already been established (indicates a state in which the bit contents of downlink and uplink transmission frames can be read).
【００２７】下り回線においては、各基地局装置２〜７
は上位局からの信号を下位方路の基地局に分配するとと
もに無線で送信する。このとき、例えば基地局装置４か
ら移動局装置８への送信波Ｆ１（４−８）と、基地局装
置５から移動局装置８への送信波Ｆ１（５−８）のタイ
ミングがある程度ずれると、Ｆ１（４−８）とＦ１（５
一８）は互いに干渉波となり、移動局装置８では正常に
受信できなくなる可能性があるため、Ｆ１（４−８）と
Ｆ１（５一８）の送信タイミングを同一にしなければな
らない。そのためには、上位局からの信号を下位方路に
送出したタイミングでは無線送信を行わず、下りの伝送
遅延を考慮し、最も下位の基地局装置に到達するまで無
線送信を遅延させることにより、複数の基地局が同じ信
号を同時刻に送信することができる。このように複数の
基地局装置から同一のタイミングで送信波Ｆ１を送信す
ることを複局同時送信という。In the downlink, each base station device 2-7
Distributes the signal from the upper station to the base station in the lower route and transmits it by radio. At this time, for example, if the timing of the transmission wave F1 (4-8) from the base station apparatus 4 to the mobile station apparatus 8 and the timing of the transmission wave F1 (5-8) from the base station apparatus 5 to the mobile station apparatus 8 deviate to some extent. , F1 (4-8) and F1 (5
Since 8) become interference waves with each other and may not be normally received by the mobile station device 8, the transmission timings of F1 (4-8) and F1 (518) must be the same. For that purpose, the wireless transmission is not performed at the timing when the signal from the upper station is sent to the lower route, the transmission delay in the downlink is considered, and the wireless transmission is delayed until reaching the lowest base station device. Multiple base stations can transmit the same signal at the same time. Transmitting the transmission wave F1 from a plurality of base station devices at the same timing in this way is called multi-station simultaneous transmission.
【００２８】上り回線においては、各基地局装置２〜７
は下位局で受信した上り信号または自局で受信した上り
信号を上位局へ中継する。ここで、移動局装置９から上
り信号Ｆ２が送信された場合、基地局装置５で受信した
上り信号をＦ２（９−５）、基地局装置６で受信した上
り信号をＦ２（９−６）とすると、それぞれ基地局装置
で受信したタイミングが同一だったとしても、その上位
局である基地局装置２においては、各ルート毎の伝送遅
延の差によりＦ２（９−５）とＦ２（９−６）の到達タ
イミングがずれる可能性がある。このように到達タイミ
ングがずれた場合において、基地局装置２がＦ２（９−
５）とＦ２（９−６）を同一の上り信号Ｆ２として認識
できる状態を複局同時受信という。In the uplink, each base station device 2-7
Relays the upstream signal received by the lower station or the upstream signal received by the local station to the upper station. Here, when the uplink signal F2 is transmitted from the mobile station apparatus 9, the uplink signal received by the base station apparatus 5 is F2 (9-5) and the uplink signal received by the base station apparatus 6 is F2 (9-6). Then, even if the timings received by the base station devices are the same, in the base station device 2, which is the higher station, due to the difference in transmission delay for each route, F2 (9-5) and F2 (9- The arrival timing of 6) may be deviated. When the arrival timings are deviated in this way, the base station device 2 uses F2 (9-
The state in which 5) and F2 (9-6) can be recognized as the same upstream signal F2 is called multi-station simultaneous reception.
【００２９】この無線通信システムでは、複局同時送信
と複局同時受信を実現するうえで、少ないコストで基地
局装置間のタイミングの調整を自動化し、定期的なタイ
ミング補正や基地局装置の増設を容易にするとともに、
良好な回線品質を確立するようにしている。In this wireless communication system, in order to realize simultaneous multi-station transmission and simultaneous multi-station reception, timing adjustment between base station devices is automated at a low cost, periodic timing correction and base station device expansion are performed. Together with
We try to establish good line quality.
【００３０】図２は、複局同時送信を実現する基地局装
置の構成を示すブロック図で、基地局装置３を例に示し
ている。なお、他の基地局装置２および４〜７も同一の
構成を有している。FIG. 2 is a block diagram showing the configuration of a base station apparatus that realizes multi-station simultaneous transmission, and shows the base station apparatus 3 as an example. The other base station devices 2 and 4 to 7 also have the same configuration.
【００３１】この基地局装置３は、基準信号受信手段と
してＧＰＳ衛星装置１０からの電波を受信するＧＰＳ受
信手段１１と、基準信号に対して本部局装置１から送出
された下りフレームが到達するまでの時間差を測定する
無線送信タイミング算出手段１２と、複局同時送信を行
うために無線送信タイミングを遅延させる無線送信遅延
手段１３と、移動局装置との間で無線送受信を行う無線
送受信手段１４と、自局の無線送受信手段１４または下
位局からの上りフレームのいずれかを選択して上位局へ
送る方路選択手段１６とを備えている。This base station device 3 receives GPS signals from the GPS satellite device 10 as reference signal receiving means, and until the downlink frame sent from the head office device 1 reaches the reference signal. Wireless transmission timing calculation means 12 for measuring the time difference between the two, wireless transmission delay means 13 for delaying the wireless transmission timing for multi-station simultaneous transmission, and wireless transmission / reception means 14 for wireless transmission / reception with the mobile station device. And a route selecting means 16 for selecting either the radio transmitting / receiving means 14 of its own station or the upstream frame from the lower station and sending it to the upper station.
【００３２】上位局である基地局装置２からのフレーム
はＧＰＳ時刻補正手段１２および無線送信遅延手段１３
に供給され、さらに下位局の基地局装置４、５に転送さ
れる構成となっている。The frame from the base station device 2 which is the upper station is a GPS time correction means 12 and a radio transmission delay means 13.
And is further transferred to the base station devices 4 and 5 of the lower station.
【００３３】次に、図３に示す説明図を参照しながら、
本実施の形態による無線通信システムの複局同時送信の
タイミング調整方法について説明する。Next, referring to the explanatory view shown in FIG.
A timing adjustment method for simultaneous multi-station transmission in the wireless communication system according to the present embodiment will be described.
【００３４】まず、本部局装置１は、図３（ａ）〜
（ｂ）に示すように、ＧＰＳ衛星装置１０から受信した
ＧＰＳ信号より得られた任意のＵＴＣ時刻（以下、ＧＰ
Ｓ時刻、という）ｔと、その△ｔ〈０〉秒後に送出する
下りフレーム番号ｎと、１フレームの長さａ秒とから、
ＧＰＳ時刻ｔ＋ｘ秒の直後に本部局装置１から送出する
予定の下りフレーム番号ｍを算出し、各基地局装置ｉ
（ｉ＝２，３，…，７）に測定予定時刻としてｔ＋ｘ、
測定フレーム番号としてｍを通知する。First, the head office device 1 is shown in FIG.
As shown in (b), an arbitrary UTC time obtained from the GPS signal received from the GPS satellite device 10 (hereinafter referred to as GP
S time)), the downlink frame number n sent after Δt <0> seconds, and the length a second of one frame,
Immediately after the GPS time t + x seconds, the downlink frame number m to be transmitted from the headquarter station device 1 is calculated, and each base station device i is calculated.
(I = 2, 3, ..., 7), t + x as the scheduled measurement time,
Notify m as the measurement frame number.
【００３５】ただし、測定予定時刻ｔ＋ｘは、ｔ＋ｘ秒
よりも前に全ての基地局装置が本部局装置１から測定予
定時刻ｔ＋ｘと測定フレーム番号ｍの通知を受信して測
定準備できるのに必要十分な時間とし、測定フレーム番
号ｍは、
ｍ＝ｎ＋ｉｎｔ｛（ｘ−Δｔ〈０〉）／ａ｝
となる。However, the scheduled measurement time t + x is necessary and sufficient so that all the base station devices can receive the notification of the scheduled measurement time t + x and the measurement frame number m from the head office device 1 and prepare for the measurement before t + x seconds. And the measurement frame number m is m = n + int {(x-Δt <0>) / a}.
【００３６】次に、基地局装置ｉに具備した無線送信タ
イミング算出手段１２は、図３（ｃ）に示すように、Ｇ
ＰＳ時刻がｔ＋ｘとなった時点から、下りフレームが自
局に到達するまでの時間差Δｔ〈ｉ〉を測定し、さらに
下位方路に基地局装置がない末端の基地局装置４〜７の
測定結果を本部局装置１へ通知する。Next, the radio transmission timing calculating means 12 provided in the base station device i, as shown in FIG.
The time difference Δt <i> from the time when the PS time becomes t + x until the downlink frame reaches the own station is measured, and the measurement results of the terminal base station devices 4 to 7 that have no base station device in the lower path To the headquarters device 1.
【００３７】本部局装置１は、通知された遅延時間Δｔ
〈ｉ〉から最大値Δｔ〈ｍａｘ〉を求めて各基地局装置
ｉへ通知する。The head office device 1 notifies the notified delay time Δt.
The maximum value Δt <max> is obtained from <i> and notified to each base station device i.
【００３８】各基地局装置ｉの無線送信タイミング算出
手段１２は、通知された最大値Δｔ〈ｍａｘ〉から自局
の遅延時間Δｔ〈ｉ〉を減じた値以上の値を自局の無線
送信遅延手段１３の遅延時間として設定する。これによ
り、図３（ｄ）と図３（ｅ）に示すように、本部局装置
１からの下りフレームは、各基地局装置ｉの無線送信遅
延手段１３で「Δｔ〈ｍａｘ〉−Δｔ〈ｉ〉」遅延され
た後に、無線送受信手段１４から送信されるため、最遠
端の基地局装置の無線送信タイミングに基地局装置ｉの
無線送信タイミングが揃えられ、全ての基地局装置から
複局同時送信がされることとなる。The radio transmission timing calculating means 12 of each base station apparatus i subtracts the delay time Δt <i> of its own station from the notified maximum value Δt <max> of a value equal to or greater than the radio transmission delay of its own station. It is set as the delay time of the means 13. As a result, as shown in FIGS. 3D and 3E, the downlink frame from the head office device 1 is “Δt <max> −Δt <i by the wireless transmission delay means 13 of each base station device i. ＞ ”Since the data is transmitted from the wireless transmission / reception means 14 after being delayed, the wireless transmission timing of the base station device i is aligned with the wireless transmission timing of the farthest end base station device, and all the base station devices simultaneously perform multi-station transmission. It will be sent.
【００３９】なお、本実施の形態では、ＧＰＳ時刻と下
りフレーム到着時刻の差とから遅延時間Δｔ〈ｉ〉を算
出したが、本部局装置１と全ての基地局装置に同時刻で
あることを通知できる電波や光などの信号でありさえす
れば、本部局装置１から各基地局装置へ測定予定時刻と
測定フレーム番号を通知するという手順に変わりがない
ため、ＧＰＳ電波の代用とすることができる。例えばＧ
ＰＳに近いシステムとしては、低軌道周回衛星位置情報
システムがあるが、光ビーコンのようなものでも代用可
能である。In this embodiment, the delay time Δt <i> is calculated from the difference between the GPS time and the arrival time of the downlink frame, but it is confirmed that the same time is found in the head office device 1 and all base station devices. As long as it is a signal such as a radio wave or light that can be notified, there is no change in the procedure of notifying the base station device of the measurement scheduled time and the measurement frame number from the headquarter station device 1, so it can be used as a substitute for GPS radio waves. it can. For example G
As a system close to PS, there is a low earth orbit satellite position information system, but a device such as an optical beacon can be used instead.
【００４０】（実施の形態２）図４は、各基地局装置ｉ
は、自局の下位局がないとき、本部局装置１から自局ま
での下り伝送遅延時間の測定結果「Ｅｉ」を本部局装置
１への上りフレームに載せて通知するが、このとき測定
結果を中継する基地局装置が測定結果に自局の基地局Ｉ
Ｄである「００ｉ」を付加して上りフレームに載せる場
合の実施の形態を示す構成図である。図中、「（ ）」
は各方路における上りフレームの伝送単位、「／」は方
路の分岐を示す記号とする。(Embodiment 2) FIG. 4 shows each base station device i.
When there is no subordinate station of its own station, the measurement result "Ei" of the downlink transmission delay time from the headquarter station device 1 to the own station is placed in the uplink frame to the headquarter station device 1 and notified. The base station device that relays the
It is a block diagram which shows embodiment when adding "00i" which is D, and mounting it in an upstream frame. "()" In the figure
Is a transmission unit of an upstream frame in each route, and “/” is a symbol indicating a branch of the route.
【００４１】この例では、基地局装置４〜７が末端とな
るので、基地局装置４〜７の遅延情報Ｅ４〜Ｅ７に、そ
れぞれ自局の基地局ＩＤである００４〜００７を付加し
て上位局へ送信する状態を示している。In this example, since the base station devices 4 to 7 are the ends, the base station IDs 004 to 007 of the own station are added to the delay information E4 to E7 of the base station devices 4 to 7, respectively. It shows the status of transmission to the station.
【００４２】下位方路を有する基地局装置２〜３では、
下位方路から基地局ＩＤ付きの遅延情報が上って来た場
合、自局の基地局ＩＤを追加して上り回線に転送する
が、下位方路が複数ある基地局装置２〜３の場合は、全
ての方路からの遅延情報が揃うまで待ってから上位局へ
伝送する。In the base station devices 2-3 having the lower routes,
When the delay information with the base station ID comes up from the lower route, the base station ID of the own station is added and transferred to the uplink, but in the case of base station devices 2 to 3 having a plurality of lower routes Waits until the delay information from all the routes is gathered before transmitting to the upper station.
【００４３】例えば基地局装置２は、リンクＬ２からの
遅延情報００３（００４Ｅ４／００５Ｅ５）と、リンク
Ｌ５からの遅延情報００６Ｅ６の両方が揃ってから、０
０２（（００３（００４Ｅ４／００５Ｅ５））／００６
Ｅ６）をリンクＬ１に送出することになる。For example, the base station apparatus 2 sets 0 after the delay information 003 (004E4 / 005E5) from the link L2 and the delay information 006E6 from the link L5 are both available.
02 ((003 (004E4 / 005E5)) / 006
E6) will be sent to the link L1.
【００４４】このように動作することにより、本部局装
置１においては遅延情報を得ると同時に全基地局装置の
トポロジー（接続状態）を認識でき、また下位方路が複
数ある基地装置においてはＩＤなどの情報が衝突したり
重複しないように制御することが可能となる。By operating in this way, the head office device 1 can obtain the delay information and at the same time recognize the topology (connection state) of all the base station devices, and in the base device having a plurality of lower routes, the ID, etc. It is possible to control so that the information of 2 does not collide or overlap.
【００４５】ここで、本部局装置１に伝送される情報
と、各リンクＬ１〜Ｌ６を伝送される情報とを整理して
示しておく。Here, the information transmitted to the head office device 1 and the information transmitted on each of the links L1 to L6 will be summarized and shown.
【００４６】本部局装置：００１((００２((００３（０
０４Ｅ４／００５Ｅ５)))/００６Ｅ６)/００７Ｅ７）
Ｌ１：００２((００３（００４Ｅ４／００５Ｅ５))／０
０６Ｅ６）
Ｌ２：００３（００４Ｅ４／００５Ｅ５）
Ｌ３：００４Ｅ４
Ｌ４：００７Ｅ７
Ｌ５：００６Ｅ６
Ｌ６：００５Ｅ５
また、各基地局装置ｉは本部局装置１に通知する遅延情
報にＧＰＳ受信手段１２から得られた位置情報を加えて
送ることにより、本部局装置１は地理的な位置関係も含
めた接続状態を認識することができる。従って、例えば
基地局装置の設置に際して、得られた位置情報を元に地
図上にプロットすることができるため、基地局間の距離
や設置場所の周辺地形などの確認が容易となる。Headquarters device: 001 ((002 ((003 (0
04E4 / 005E5))) / 006E6) / 007E7) L1: 002 ((003 (004E4 / 005E5))) / 0
06E6) L2: 003 (004E4 / 005E5) L3: 004E4 L4: 007E7 L5: 006E6 L6: 005E5 Further, each base station device i receives the position information obtained from the GPS receiving means 12 in the delay information notified to the head office device 1. By adding and sending, the central station device 1 can recognize the connection state including the geographical positional relationship. Therefore, for example, when installing the base station device, it is possible to plot on the map based on the obtained position information, so that it becomes easy to confirm the distance between the base stations and the surrounding topography of the installation place.
【００４７】（実施の形態３）図５は、複局同時受信を
実現するための基地局装置の構成を示すブロック図であ
る。なお、基地局装置３を例に示しているが、他の基地
局装置２および４〜７も同一の構成を有している。(Third Embodiment) FIG. 5 is a block diagram showing a configuration of a base station apparatus for realizing multi-station simultaneous reception. Although the base station device 3 is shown as an example, the other base station devices 2 and 4 to 7 have the same configuration.
【００４８】この基地局装置３は、無線送受信手段１４
と、無線送受信手段１４からの受信方路および下位局が
接続されている下位方路からの上りフレームのタイミン
グを同期させるためのフレーム同期比較手段１７と、フ
レーム同期比較手段１７によって遅延時間が制御される
各ノード別に具備した遅延補正手段１８と、無線送受信
手段１４からの受信方路および下位局からのフレームを
選択して上位局に転送する方路選択手段１６とを備えて
いる。This base station device 3 has a radio transmitting / receiving means 14
And a frame synchronization comparison unit 17 for synchronizing the timing of the upstream frame from the reception route from the wireless transmission / reception unit 14 and the lower route to which the lower station is connected, and the delay time is controlled by the frame synchronization comparison unit 17. Each node is provided with a delay compensating means 18 and a route selecting means 16 for selecting a receiving route from the radio transmitting / receiving means 14 and a frame from a lower station and transferring the frame to an upper station.
【００４９】次に、図６に示す説明図を参照しながら、
本実施の形態による無線通信システムの複局同時受信の
タイミング調整方法について説明する。なお、図中に示
すＡ１〜Ａ４、Ｂ１〜Ｂ４、Ｃ１〜Ｃ４は、図５に同一
符号で示す位置の信号の発生タイミングを表している。Next, referring to the explanatory view shown in FIG.
A timing adjustment method for multi-station simultaneous reception in the wireless communication system according to the present embodiment will be described. In addition, A1 to A4, B1 to B4, and C1 to C4 shown in the drawing represent generation timings of signals at positions indicated by the same reference numerals in FIG.
【００５０】まず、本部局装置１で生成され各基地局装
置ｉに同報される下りフレームＡ１は、無線送信遅延手
段１３で遅延され、無線送受信手段１４から無線信号Ａ
２として送信される。また、フレームＡ１はリンク回線
を通り下位局である基地局装置４、５にフレームＢ１、
Ｃ１として到達する。First, the downlink frame A1 generated by the head office device 1 and broadcast to each base station device i is delayed by the radio transmission delay means 13 and the radio signal A from the radio transmission / reception means 14.
Sent as 2. Further, the frame A1 passes through the link line and is transmitted to the base station devices 4 and 5 which are the lower stations, by the frame B1,
Reach as C1.
【００５１】無線基地局４に到達したフレームＢ１は、
無線送信遅延手段１３で遅延され、無線送受信手段１４
から無線信号Ｂ２として送信される。無線基地局５に到
達したフレームＣ１も、無線送信遅延手段１３で遅延さ
れ、無線送受信手段１４から無線信号Ｃ２として送信さ
れる。このとき、無線基地局３〜５の各無線送信遅延手
段１３の遅延時間を、前述のように設定しておくことに
より、無線信号Ａ２〜Ｃ２を複局同時送信することがで
きる。The frame B1 reaching the radio base station 4 is
It is delayed by the wireless transmission delay means 13, and the wireless transmission / reception means 14
Is transmitted as a wireless signal B2. The frame C1 that has reached the wireless base station 5 is also delayed by the wireless transmission delay means 13 and transmitted from the wireless transmission / reception means 14 as a wireless signal C2. At this time, by setting the delay time of each wireless transmission delay means 13 of the wireless base stations 3 to 5 as described above, the wireless signals A2 to C2 can be simultaneously transmitted to multiple stations.
【００５２】一方、複局同時送信が可能な状態で、任意
の下りフレームが無線送受信手段１４に到達した時点よ
り一定時間後に上りフレーム同期信号を発生させる。こ
の上りフレーム同期信号に含まれるフレーム番号は、任
意の下りフレームに含まれるフレーム番号と対応させれ
ば、各基地局で同一に設定できる。On the other hand, in a state in which multi-station simultaneous transmission is possible, an upstream frame synchronization signal is generated after a fixed time from the time when an arbitrary downstream frame arrives at the wireless transmission / reception means 14. The frame number included in the upstream frame synchronization signal can be set to be the same in each base station if it corresponds to the frame number included in an arbitrary downlink frame.
【００５３】次に、各基地局装置ｉに具備したフレーム
同期比較手段１７は、各下位方路から到達した上りフレ
ームＡ３〜Ｃ３から同じフレーム番号を含むものを比較
し、一番到着が遅い方路の上りフレームに合わせて他の
上りフレームが揃うように遅延時間を算出する。Next, the frame synchronization comparing means 17 provided in each base station device i compares the upstream frames A3 to C3 having the same frame number, which arrive from each lower route, and compares the upstream frames A3 to C3 with the latest frame. The delay time is calculated so that other upstream frames are aligned with the upstream frame of the road.
【００５４】このように方路毎に算出した遅延時間を各
々の方路に具備した遅延補正手段１８に設定することに
より、遅延補正手段１８を通過した上りフレームＡ４〜
Ｃ４のフレーム同期信号の位置が一致するようになる。
通過した上りフレームＡ４〜Ｃ４は方路選択手段１６に
より予め一定のルールで優先度が決められた方路の上り
フレームが選択され、上位局に中継される。By setting the delay time thus calculated for each route in the delay correcting means 18 provided in each route, the upstream frames A4 through
The positions of the frame synchronization signal of C4 come to coincide.
For the passed upstream frames A4 to C4, the route selection means 16 selects an upstream frame whose route has a priority determined in advance by a certain rule, and is relayed to the upper station.
【００５５】このように動作することにより、最下位局
から順に遅延補正手段１８の遅延時間が決定し、上りフ
レームが合流する基地局装置において上りフレームのタ
イミングが揃えられるため、最後に本部局装置１の遅延
補正手段１８の設定が終わった時点で、複局同時受信が
実現する。By operating in this way, the delay time of the delay correction means 18 is determined in order from the lowest station, and the timings of the upstream frames are aligned in the base station device where the upstream frames merge. When the setting of the delay correction unit 18 of 1 is completed, the multi-station simultaneous reception is realized.
【００５６】また、複局同時受信が可能な状態におい
て、受信した基地局装置が上りフレームに受信品質情報
（受信入力レベルや同期ワードの相関値など）を付加
し、基地局装置に具備した方路選択手段１６が上りフレ
ームに含まれる受信品質情報を比較して、受信品質の良
い上りフレームを選択し、上位局に中継するようにして
もよい。Further, in a state in which multi-station simultaneous reception is possible, the receiving base station apparatus adds reception quality information (reception input level, synchronization word correlation value, etc.) to an upstream frame, and the base station apparatus has it. The route selection means 16 may compare the reception quality information included in the upstream frames, select the upstream frame with good reception quality, and relay the upstream frame to the upper station.
【００５７】例えば、移動局装置９の送信波が基地局装
置５と基地局装置６に受信され（それぞれ順にＦ２（９
−５）、Ｆ２（９−６）と呼ぶ）、Ｆ２（９一６）の受
信品質の方が良い場合、基地局装置３では基地局装置４
からの上りフレームにはＦ２が含まれないため、Ｆ２
（９−５）が上位局である基地局装置２に中継される
が、基地局装置２ではＦ２（９−６）とＦ２（９−５）
の受信品質情報を比較し、Ｆ２（９−６）が本部局装置
１に中継される。For example, the transmission wave of the mobile station device 9 is received by the base station device 5 and the base station device 6 (F2 (9
-5), referred to as F2 (9-6)) and F2 (9-16), the base station device 3 is the base station device 4 when the reception quality is better.
F2 is not included in the upstream frame from
(9-5) is relayed to the base station apparatus 2 which is the higher station, but in the base station apparatus 2, F2 (9-6) and F2 (9-5) are relayed.
F2 (9-6) is relayed to the head office device 1 by comparing the reception quality information of.
【００５８】このように方路選択手段１６が上りフレー
ムに含まれる受信品質情報を比較することにより、ある
移動局装置からの送信波が複数の基地局装置で同時に受
信された場合に、より受信品質の良い基地局装置で受信
した上りフレームが自動的に選ばれるサイトダイバーシ
チが可能となる。In this way, the route selecting means 16 compares the reception quality information contained in the upstream frames, so that when a transmission wave from a mobile station apparatus is simultaneously received by a plurality of base station apparatuses, it is more received. Site diversity in which an uplink frame received by a high quality base station device is automatically selected becomes possible.
【００５９】以上のように本実施の形態によれば、下り
回線においては各基地局装置の無線送信タイミングをＧ
ＰＳ時刻を参照して補正することで複局同時送信が可能
となり、上り回線においては補正された無線送信タイミ
ングに同期した上りフレームが基地局装置を経由して合
流する毎に一番遅い上りフレームタイミングに揃えられ
た後に選択されることで、複局同時受信が可能となるも
のである。As described above, according to the present embodiment, the radio transmission timing of each base station apparatus is set to G in the downlink.
By correcting with reference to the PS time, simultaneous multi-station transmission becomes possible, and in the uplink, the latest upstream frame synchronized with the corrected wireless transmission timing merges via the base station device. By selecting after the timing is aligned, simultaneous reception of multiple stations becomes possible.
【００６０】[0060]
【発明の効果】以上説明したように、本発明は各基地局
装置において本部局装置から一斉通知された遅延情報の
最大値から自局の遅延時間を減じた値を自局の遅延時間
と設定することにより、基地局装置間のタイミング調整
を自動化し、本部局装置から送出された下りフレーム
を、この遅延時間分遅延させた後に無線送信することで
全ての基地局装置から同時刻に送信する複局同時送信が
可能な無線通信システムの基地局装置を提供できるもの
である。As described above, according to the present invention, in each base station device, a value obtained by subtracting the delay time of the own station from the maximum value of the delay information which is simultaneously notified from the head office device is set as the delay time of the own station. By doing so, the timing adjustment between the base station devices is automated, and the downlink frame sent from the head office device is delayed by this delay time and then wirelessly transmitted so that all base station devices transmit at the same time. It is possible to provide a base station device of a wireless communication system capable of simultaneous multi-station transmission.
【図１】本発明が適用される無線通信システムの構成図FIG. 1 is a configuration diagram of a wireless communication system to which the present invention is applied.
【図２】図１に示す基地局装置の構成図FIG. 2 is a block diagram of the base station apparatus shown in FIG.
【図３】複局同時送信のためのタイミング調整方法を示
す説明図FIG. 3 is an explanatory diagram showing a timing adjustment method for multi-station simultaneous transmission.
【図４】遅延情報に自局ＩＤを付加して上位局へ送信す
る無線通信システムの構成図FIG. 4 is a configuration diagram of a wireless communication system that adds a local station ID to delay information and transmits it to a higher station.
【図５】図１に示す基地局装置の構成図FIG. 5 is a block diagram of the base station apparatus shown in FIG.
【図６】複局同時受信のためのタイミング調整方法を示
す説明図FIG. 6 is an explanatory diagram showing a timing adjustment method for simultaneous reception of multiple stations.
１ 本部局装置 ２、３、４、５、６、７ 基地局装置 ８、９ 移動局装置 １０ ＧＰＳ衛星装置 １１ ＧＰＳ受信手段 １２ 無線送信タイミング算出手段 １３ 無線送信遅延手段 １４ 無線送受信手段 １５ スイッチ手段 １６ 方路選択手段 １７ フレーム同期比較手段 １８ 遅延補正手段 1 Headquarters device 2, 3, 4, 5, 6, 7 Base station device Mobile station equipment 10 GPS satellite device 11 GPS receiving means 12 Wireless transmission timing calculation means 13 Wireless transmission delay means 14 Wireless transmission / reception means 15 Switch means 16 way selection means 17 Frame synchronization comparison means 18 Delay correction means
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−291713（ＪＰ，Ａ) 特開 平８−307932（ＪＰ，Ａ) 特開 昭63−115499（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 7/24 - 7/26 102 H04Q 7/00 - 7/38 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-6-291713 (JP, A) JP-A-8-307932 (JP, A) JP-A-63-115499 (JP, A) (58) Field (Int.Cl. 7 , DB name) H04B 7/ 24-7/26 102 H04Q 7/ 00-7/38
Claims (7)
の基地局装置間で一定周期のフレーム単位でディジタル
信号を伝送する無線通信システムにおいて、 前記本部局装置と前記基地局装置は、 前記無線通信システム全てに対し同時刻を認識できる信
号を受信する基準信号受信手段と、 無線送信タイミング算出手段と、 無線送信遅延手段と、 無線送信手段とを備え、 前記無線送信タイミング算出手段は、前記基準信号受信
手段から得られた基準信号と前記本部局装置から送出さ
れる下りフレームの到達時間の差を測定して本部局装置
へ通知し、前記本部局装置から報知される前記時間差の
最大値以上の一定値から前記測定した時間差を減じた値
を前記送信遅延手段における遅延時間とすることで、前
記無線送信手段が複局同時送信を行うことを特徴とする
無線通信システムの基地局装置。1. A wireless communication system for transmitting a digital signal in frame units of a constant cycle between a plurality of base station devices connected to a main station device in a tree structure, wherein the main station device and the base station device are: The wireless transmission system includes a reference signal receiving unit that receives a signal capable of recognizing the same time for all wireless communication systems, a wireless transmission timing calculation unit, a wireless transmission delay unit, and a wireless transmission unit. The difference between the arrival time of the reference frame obtained from the reference signal receiving means and the downlink frame transmitted from the head office device is measured and notified to the head office device, and the maximum value of the time difference reported from the head office device is measured. By setting the value obtained by subtracting the measured time difference from the above constant value as the delay time in the transmission delay means, the wireless transmission means performs the multi-station simultaneous transmission. And a base station device of a wireless communication system.
の基地局装置間で一定周期のフレーム単位でディジタル
信号を伝送する無線通信システムにおいて、 前記基地局装置は、 移動局装置からの電波を受信する無線受信手段と、 前記無線送受信手段からの受信方路および下位局が接続
されている下位方路からの上りフレームを各方路別に遅
延制御する遅延補正手段と、 前記各方路からの上りフレームタイミングを同期させる
ために前記遅延補正手段の遅延時間を制御するフレーム
同期比較手段と、 前記遅延補正手段で遅延した前記各方路のフレームを選
択して上位局に転送する方路選択手段とを備え、 前記移動局装置の送信波が前記複数の基地局装置で同時
に受信された場合に、その複数の上りフレームが下位方
路のある前記基地局装置において合流時にタイミングを
揃えることで複局同時受信を行うことを特徴とする無線
通信システムの基地局装置。2. A wireless communication system for transmitting a digital signal in a frame unit of a constant cycle between a plurality of base station devices connected to a central station device in a tree structure, wherein the base station device is a radio wave from a mobile station device. A radio receiving means for receiving a radio signal, a delay correcting means for delay-controlling, for each route, an upstream frame from a lower route to which a lower station is connected and a receiving route from the wireless transmitting and receiving means, and from each of the routes Frame synchronization comparing means for controlling the delay time of the delay compensating means for synchronizing the upstream frame timing, and route selection for selecting the frame of each of the routes delayed by the delay compensating means and transferring it to the upper station. And a plurality of uplink frames are transmitted to the base station device having a lower route when the transmission waves of the mobile station device are simultaneously received by the plurality of base station devices. A base station device of a wireless communication system, wherein simultaneous reception is performed by arranging timings at the time of merging.
の基地局装置間で一定周期のフレーム単位でディジタル
信号を伝送する無線通信システムにおいて、 前記複数の基地局装置はそれぞれ任意の基準時刻と下り
フレーム到着時刻との時間差を測定し、 前記複数の基地局装置のなかで下位方路のない基地局装
置は測定した時間差を遅延情報として前記本部局装置に
通知し、 前記本部局装置は前記通知された遅延情報のなかの最大
値を前記複数の基地局装置へ報知し、 前記複数の基地局装置は報知された前記遅延情報の最大
値から自局で測定した時間差を減じた値を無線送信遅延
時間としてそれぞれ設定し、 前記複数の基地局装置は前記本部局装置から送出された
フレームを前記無線送信遅延時間分遅延させた後に送信
することで複局同時送信を行うことを特徴とする無線通
信システムのタイミング調整方法。3. A wireless communication system for transmitting a digital signal in frame units of a fixed cycle between a plurality of base station devices connected to a head office device in a tree structure, wherein each of the plurality of base station devices has an arbitrary reference time. And measuring the time difference between the downlink frame arrival time, the base station device without a lower route among the plurality of base station device notifies the measured time difference as delay information to the central station device, the central station device The maximum value among the notified delay information is reported to the plurality of base station devices, the plurality of base station devices is a value obtained by subtracting the time difference measured in the own station from the maximum value of the notified delay information. Each of the base station devices is set as a radio transmission delay time, and the plurality of base station devices delay the frame transmitted from the headquarter station device by the radio transmission delay time and then transmit the frame to transmit the multi-station simultaneous transmission. The timing adjustment method of a wireless communication system and performing.
部局装置に前記遅延情報を通知する際に、前記遅延情報
に自局の基地局ＩＤを付加して上位方路に転送し、下位
方路を有する前記基地局装置は前記下位方路のない基地
局装置から基地局ＩＤ付き遅延情報を受けると、これら
に自局の基地局ＩＤを付加して上位方路に転送すること
を特徴とする請求項３に記載の無線通信システムのタイ
ミング調整方法。4. When the base station device without the lower route notifies the main station device of the delay information, the base station ID of its own station is added to the delay information and transferred to the upper route, When the base station device having the lower route receives the delay information with the base station ID from the base station device having no lower route, the base station device adds the base station ID of its own station to these and transfers it to the upper route. The timing adjusting method for a wireless communication system according to claim 3, wherein
れた位置情報を前記自局の基地局ＩＤと共に前記遅延情
報に付加して前記本部局装置へ転送し、前記本部局装置
は地図データと照合することにより、地理的な位置関係
も含めた接続状態図を構築することを特徴とする請求項
４に記載の無線通信システムのタイミング調整方法。5. The plurality of base station devices add position information obtained from GPS together with the base station ID of the own station to the delay information and transfer the delay information to the head office device. 5. The timing adjusting method for a wireless communication system according to claim 4, wherein a connection state diagram including a geographical positional relationship is constructed by collating with the above.
の基地局装置間で一定周期のフレーム単位でディジタル
信号を伝送する無線通信システムにおいて、 下位方路を有する基地局装置は各下位方路および自局の
無線受信手段で受信した上りフレームタイミングおよび
そのフレーム番号を比較し、 同一のフレーム番号のフレームタイミングが一致するよ
うに各下位方路に設けた遅延補正手段を調整し、 任意または予め優先度を定めた方路の上りフレームを選
択して上位局に中継することで複局同時受信を行うこと
を特徴とする無線通信システムのタイミング調整方法。6. In a wireless communication system for transmitting a digital signal in frame units of a constant cycle between a plurality of base station devices connected to a head office device in a tree structure, each base station device having a lower route is a lower one. The uplink frame timing and its frame number received by the radio receiving means of the route and its own station, and adjust the delay correction means provided in each lower route so that the frame timing of the same frame number matches, A timing adjustment method for a wireless communication system, comprising performing simultaneous multi-station reception by selecting an upstream frame of a route whose priority is set in advance and relaying it to an upper station.
自局の無線受信手段で受信したフレームとを比較して選
択する際に、回線品質が最良と推定された方路の上りフ
レームを上位局に中継することを特徴とする請求項６に
記載の無線通信システムのタイミング調整方法。7. When comparing and selecting an upstream frame from the lower route and a frame received by the radio receiving means of the local station, the upstream frame of the route in which the line quality is estimated to be the best is higher. The timing adjustment method for a wireless communication system according to claim 6, wherein the method is relayed to a station.
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|---|---|---|---|
| JP2000206110A JP3376444B2 (en) | 2000-07-07 | 2000-07-07 | Base station apparatus and timing adjustment method for wireless communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000206110A JP3376444B2 (en) | 2000-07-07 | 2000-07-07 | Base station apparatus and timing adjustment method for wireless communication system |
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| KR100933165B1 (en) * | 2002-07-20 | 2009-12-21 | 삼성전자주식회사 | Information measuring device and method for providing location service in asynchronous mobile communication system |
| JP4258471B2 (en) | 2005-01-13 | 2009-04-30 | セイコーエプソン株式会社 | Time error information providing system, terminal device, terminal device control method, terminal device control program, and computer-readable recording medium recording the terminal device control program |
| JP4655870B2 (en) * | 2005-10-18 | 2011-03-23 | 日本電気株式会社 | Packet transmission / reception system and elapsed time measurement method |
| JP4831628B2 (en) * | 2005-12-07 | 2011-12-07 | 学校法人東京電機大学 | Switching node, communication system, and switching node control method |
| US7711008B2 (en) | 2006-01-23 | 2010-05-04 | Ipwireless, Inc. | Quasi synchronous transmission in cellular networks |
| JP2008002888A (en) * | 2006-06-21 | 2008-01-10 | Fujitsu Ltd | Wireless positioning system |
| JP2008136002A (en) * | 2006-11-29 | 2008-06-12 | Hitachi Kokusai Electric Inc | Radio communication system and radio base station |
| JP4828454B2 (en) * | 2007-03-06 | 2011-11-30 | 三菱電機株式会社 | Wide area wireless communication system and timing adjustment method thereof |
| EP2206316B1 (en) | 2007-10-23 | 2013-08-14 | Koninklijke KPN N.V. | Method and system for synchronizing a group of end-terminals |
| JP5186244B2 (en) * | 2008-02-29 | 2013-04-17 | 株式会社日立国際電気 | Wireless communication system |
| CN101841361B (en) * | 2009-03-18 | 2012-11-07 | 上海贝尔股份有限公司 | Method and device for controlling transmission delay in cooperative multipoint transmission system |
| JPWO2018097073A1 (en) * | 2016-11-24 | 2019-10-17 | 日本電気株式会社 | Information notification apparatus, information notification method and program |
| JP7201073B2 (en) * | 2019-04-01 | 2023-01-10 | 株式会社デンソー | Information processing equipment |
| JP7058694B2 (en) * | 2020-08-20 | 2022-04-22 | 三菱電機株式会社 | Base station equipment and terminal wireless equipment |
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