JP2001339337A - Wireless relay system - Google Patents
Wireless relay systemInfo
- Publication number
- JP2001339337A JP2001339337A JP2000160588A JP2000160588A JP2001339337A JP 2001339337 A JP2001339337 A JP 2001339337A JP 2000160588 A JP2000160588 A JP 2000160588A JP 2000160588 A JP2000160588 A JP 2000160588A JP 2001339337 A JP2001339337 A JP 2001339337A
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- Prior art keywords
- repeater
- radio wave
- signal
- station
- slave
- 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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- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、移動体通信用の無
線中継システムに関し、とくに外部からの電波が到達し
にくいトンネルなどの電波不感地帯に存在する移動局
と、電波不感地帯の外部に存在する移動体通信基地局と
の間の無線通信を確保するための無線中継システムに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio relay system for mobile communication, and more particularly, to a mobile station located in a radio wave insensitive zone such as a tunnel where external radio waves are difficult to reach, and a mobile station located outside a radio wave insensitive zone. The present invention relates to a wireless relay system for securing wireless communication with a mobile communication base station.
【０００２】[0002]
【従来の技術】従来、屋外からの電波が到達しにくいト
ンネルなどの電波不感地帯では、内部に存在する携帯電
話などの移動局と屋外の移動体通信基地局との間で容易
に無線通信が行えるように、無線中継システムを設けて
いた。2. Description of the Related Art Conventionally, in a radio wave blind zone such as a tunnel where radio waves from the outside are difficult to reach, wireless communication between a mobile station such as a mobile phone located inside and a mobile communication base station outside can be easily performed. A wireless relay system was provided to enable this.
【０００３】従来の無線中継システムとしては、例えば
移動体通信基地局からの電波を電波状況が良好な地点に
設置した親局中継器でとらえ、増幅後にトンネル内に設
置した漏洩同軸ケーブルから電波として放射するシステ
ム（例えば特開平９−１３０３２２号公報）と、無線信
号をトンネル内に設置した複数の子局中継器から電波と
して放射するシステム（例えば特開平９−２１４４１３
号公報）があった。[0003] As a conventional wireless relay system, for example, radio waves from a mobile communication base station are captured by a master station repeater installed at a location where radio wave conditions are good, and after amplification, a radio wave is transmitted from a leaky coaxial cable installed in a tunnel. A system that radiates radio signals (for example, Japanese Patent Application Laid-Open No. Hei 9-130322) and a system that radiates radio signals as radio waves from a plurality of slave repeaters installed in a tunnel (for example, Japanese Patent Application Laid-Open No. 9-214413)
Publication).
【０００４】[0004]
【発明が解決しようとする課題】前述した従来例におい
て、漏洩同軸ケーブルを用いた前者の例では、漏洩同軸
ケーブルの損失が大きいため、長距離の伝送が難しく、
中継アンプが大型化し、消費電力が大きくなるという課
題があった。In the above-mentioned conventional example, in the former example using a leaky coaxial cable, long-distance transmission is difficult due to a large loss of the leaky coaxial cable.
There is a problem that the relay amplifier becomes large and power consumption increases.
【０００５】また、列車トンネルのように天井に高圧架
線が張られている電波不感地帯の場合は、トンネルの上
部に漏洩同軸ケーブルや子局中継器を設置することが難
しいため側壁面に設置する必要があった。しかし、列車
トンネルではそれほど長く敷設できないことや、子局中
継器間隔が狭いため、列車がすれ違う際に一方の列車が
他方の列車に対し電波遮蔽物として作用し、子局中継器
と他方の列車内の移動局との間で無線通信ができなくな
るという課題があった。[0005] In the case of a radio wave blind zone where a high-voltage overhead line is stretched on the ceiling, such as a train tunnel, it is difficult to install a leaky coaxial cable or a slave station repeater on the top of the tunnel. Needed. However, because the train tunnel cannot be laid so long and the interval between slave stations is narrow, when trains pass each other, one train acts as a radio wave shield for the other train, and the slave station repeater and the other train There is a problem that wireless communication cannot be performed with a mobile station within the network.
【０００６】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、列車トンネルなどの電波不感
地帯の側壁面に設置した子局中継器と、電波不感地帯内
を移動する移動局との間で良好な無線通信を行うことが
できる無線中継システムを提供するものである。SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and it is an object of the present invention to provide a slave station repeater installed on a side wall of a radio wave insensitive zone such as a train tunnel, and a mobile station moving in a radio wave insensitive zone. An object of the present invention is to provide a wireless relay system capable of performing good wireless communication with a station.
【０００７】[0007]
【課題を解決するための手段】本発明の無線中継システ
ムは、電波不感地帯の外部に設置され移動体通信基地局
との間で信号送受信を行い信号を変換する親局中継器
と、親局中継器に有線伝送路を通じて接続され親局中継
器からの信号を受信し無線信号に変換して輻射すると共
に移動局からの無線信号を受信・変換し有線伝送路を通
じて親局中継器に送信する複数の子局中継器とを備え、
複数の子局中継器が電波不感地帯内の両側壁面に交互に
一定間隔で設置された構成を有している。SUMMARY OF THE INVENTION A radio relay system according to the present invention is provided outside a radio wave insensitive zone, and transmits and receives signals to and from a mobile communication base station and converts a signal. It is connected to the repeater through a wired transmission path, receives a signal from the master repeater, converts it into a radio signal, radiates it, receives and converts a radio signal from the mobile station, and transmits it to the master repeater through a wired transmission path. Comprising a plurality of slave station repeaters,
It has a configuration in which a plurality of slave station repeaters are alternately installed on both side walls in a radio wave insensitive zone at regular intervals.
【０００８】この構成により、例えば電波不感地帯であ
るトンネル内で列車がすれ違った際に、一方の列車が他
方の列車に対して電波遮蔽物として作用しても、電波不
感地帯の両側壁面に複数の子局中継器が設置されている
ので、子局中継器と列車内の移動局との間で良好な無線
通信を行うことができ、また複数の子局中継器を両側壁
面に交互に配置することにより、少ない数の子局中継器
で電波不感地帯内を全てカバーできることとなる。[0008] With this configuration, for example, when trains pass each other in a tunnel which is a radio wave insensitive zone, even if one train acts as a radio wave shield against the other train, a plurality of trains are provided on both side walls of the radio wave insensitive zone. Is installed, so good wireless communication can be performed between the slave station repeater and the mobile station in the train, and multiple slave station repeaters are alternately arranged on both side walls. By doing so, it is possible to cover the entire radio wave insensitive zone with a small number of slave station repeaters.
【０００９】また、本発明の無線中継システムは、電波
不感地帯の外部に設置され移動体通信基地局との間で信
号送受信を行い信号を変換する親局中継器と、親局中継
器に有線伝送路を通じて接続され親局中継器からの信号
を受信し無線信号に変換して輻射すると共に移動局から
の無線信号を受信・変換し有線伝送路を通じて親局中継
器に送信する複数の子局中継器とを備え、複数の子局中
継器が電波不感地帯内の一方の側壁面に一定間隔で設置
され、他方の側壁面に無線信号を反射する電波反射板が
設置された構成を有している。A wireless relay system according to the present invention is provided outside a radio wave insensitive zone, and transmits and receives signals to and from a mobile communication base station and converts a signal. A plurality of slave stations connected through a transmission line to receive a signal from a master station repeater, convert the signal into a radio signal, radiate the signal, receive and convert a radio signal from a mobile station, and transmit the signal to the master station repeater through a wired transmission path. Having a configuration in which a plurality of slave station repeaters are provided at regular intervals on one side wall surface in the radio wave insensitive zone, and a radio wave reflection plate for reflecting a radio signal is installed on the other side wall surface. ing.
【００１０】この構成により、例えば電波不感地帯であ
るトンネル内で列車がすれ違った際に、一方の列車が他
方の列車に対して電波遮蔽物として作用しても、電波不
感地帯の一方の側壁面に複数の子局中継器が設置され、
他方の側壁面に電波反射板が設置されているので、子局
中継器と列車内の移動局との間で良好な無線通信を行う
ことができることとなる。[0010] With this configuration, for example, when trains pass each other in a tunnel that is a radio wave insensitive zone, even if one train acts as a radio wave shield against the other train, one side wall surface of the radio wave insensitive zone Multiple slave station repeaters are installed in
Since the radio wave reflecting plate is provided on the other side wall surface, good wireless communication can be performed between the slave station repeater and the mobile station in the train.
【００１１】また、本発明の無線中継システムは、電波
不感地帯の外部に設置され移動体通信基地局との間で信
号送受信を行い信号を変換する親局中継器と、親局中継
器に有線伝送路を通じて接続され親局中継器からの信号
を受信し無線信号に変換して輻射すると共に移動局から
の無線信号を受信・変換し有線伝送路を通じて親局中継
器に送信する複数の子局中継器とを備え、複数の子局中
継器が電波不感地帯内の一方の側壁面に一定間隔で設置
され、他方の側壁面に無線信号を受信して再送信する無
線中継器が設置された構成を有する。A wireless relay system according to the present invention is provided outside a radio wave insensitive zone, and transmits and receives signals to and from a mobile communication base station and converts signals. A plurality of slave stations connected through a transmission line to receive a signal from a master station repeater, convert the signal into a radio signal, radiate the signal, receive and convert a radio signal from a mobile station, and transmit the signal to the master station repeater through a wired transmission path. A plurality of slave repeaters are installed at regular intervals on one side wall in the radio wave dead zone, and a wireless repeater for receiving and retransmitting a radio signal is installed on the other side wall. Having a configuration.
【００１２】この構成により、例えば電波不感地帯であ
るトンネル内で列車がすれ違った際に、一方の列車が他
方の列車に対して電波遮蔽物として作用しても、電波不
感地帯の一方の側壁面に複数の子局中継器が設置され、
他方の側壁面に無線中継器が設置されているので、子局
中継器と列車内の移動局との間で良好な無線通信を行う
ことができることとなる。With this configuration, for example, when trains pass each other in a tunnel which is a radio wave insensitive zone, even if one train acts as a radio wave shield for the other train, one side wall surface of the radio wave insensitive zone Multiple slave station repeaters are installed in
Since the wireless repeater is installed on the other side wall surface, good wireless communication can be performed between the slave repeater and the mobile station in the train.
【００１３】本発明の無線中継システムは、複数の子局
中継器が電波不感地帯内の一方の側壁面に電波不感地帯
内に存在し得る電波遮蔽物の長さより長い間隔をもって
設置された構成を有している。The radio relay system according to the present invention has a configuration in which a plurality of slave repeaters are installed on one of the side walls in the radio wave dead zone at an interval longer than the length of a radio wave shield that can exist in the radio wave dead zone. Have.
【００１４】この構成により、例えば電波不感地帯であ
るトンネル内で列車がすれ違った際に、一方の列車が他
方の列車に対して電波遮蔽物として作用しても、少なく
とも一方の子局中継器と電波反射板または無線中継器と
の間が見通せるので、子局中継器と他方の列車内の移動
局との間で良好な無線通信を行うことができることとな
る。According to this configuration, for example, when trains pass each other in a tunnel which is a radio wave insensitive zone, even if one train acts as a radio wave shield for the other train, at least one of the slave repeaters is used. Since it is possible to see between the radio wave reflector and the wireless repeater, good wireless communication can be performed between the slave repeater and the mobile station in the other train.
【００１５】本発明の無線中継システムは、電波不感地
帯内の側壁面に一定間隔で設置された複数の子局中継器
の中間位置に、受信専用の受信器が設置された構成を有
している。The radio relay system according to the present invention has a configuration in which a receiver dedicated to reception is installed at an intermediate position between a plurality of slave repeaters installed at regular intervals on a side wall surface in a radio wave insensitive zone. I have.
【００１６】この構成により、子局中継器は送信レベル
を上げることで遠い地点の移動局に対して十分な電波を
送信し、送信レベルを上げにくい移動局からの電波は子
局中継器と受信器とによって受信点を増やすことで十分
な受信レベルを確保することができることとなる。With this configuration, the slave repeater transmits a sufficient radio wave to the mobile station at a distant point by increasing the transmission level, and the radio wave from the mobile station which is difficult to increase the transmission level is received by the slave repeater. By increasing the number of reception points by the device, a sufficient reception level can be ensured.
【００１７】本発明の無線中継システムは、電波不感地
帯の出入口近傍の外側に設置され親局中継器に有線伝送
路を通じて接続された外部中継器を有し、この外部中継
器によって開空間移動体通信基地局エリアとのチャンネ
ル切替領域を形成した構成を有している。The wireless relay system according to the present invention has an external repeater installed outside the entrance / exit of the radio wave blind zone and connected to a master repeater through a wired transmission line. It has a configuration in which a channel switching area with the communication base station area is formed.
【００１８】この構成により、移動局が電波不感地帯の
外部から内部へ、または内部から外部へ移動するとき
に、移動局は移動体通信基地局と外部子局中継器との間
でチャンネル切り替えを行うので、無線通信が中断する
確率が低い状態でスムーズに切り替えることができるこ
ととなる。With this configuration, when the mobile station moves from outside to inside or from inside to outside of the radio wave insensitive zone, the mobile station switches the channel between the mobile communication base station and the external slave station repeater. As a result, the switching can be smoothly performed in a state where the probability of interrupting the wireless communication is low.
【００１９】[0019]
【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。Embodiments of the present invention will be described below with reference to the drawings.
【００２０】（実施の形態１）図１は、本発明による無
線中継システムの実施の形態１を示す構成図である。同
図において、移動体通信基地局１は図示せぬ回線網に接
続されており、電波状況の良好な地点に設置された親局
中継器２との間で無線通信または有線通信が行えるよう
に構成されている。(Embodiment 1) FIG. 1 is a configuration diagram showing Embodiment 1 of a wireless relay system according to the present invention. In FIG. 1, a mobile communication base station 1 is connected to a circuit network (not shown) so that a wireless communication or a wired communication can be performed with a master station repeater 2 installed at a point having a good radio wave condition. It is configured.
【００２１】親局中継器２は電波不感地帯であるトンネ
ル３の外部に設置されており、有線伝送路である光ファ
イバ４ａ、４ｂを通じてトンネル３内の側壁面３ａ、３
ｂに設置された複数の子局中継器５ａ、５ｂに接続され
ている。The master station repeater 2 is installed outside the tunnel 3 which is a radio wave insensitive zone, and receives side walls 3a, 3a in the tunnel 3 through optical fibers 4a and 4b which are wire transmission paths.
b is connected to a plurality of slave station repeaters 5a and 5b installed in the slave station.
【００２２】複数の子局中継器５ａは一方の側壁面３ａ
に一定の間隔で設置されており、複数の子局中継器５ｂ
は他方の側壁面３ｂに、子局中継器５ａの中間位置に位
置するように一定の間隔で設置されている。従って、子
局中継器５ａと子局中継器５ｂとは交互に配置された状
態となっている。A plurality of slave repeaters 5a are provided on one side wall surface 3a.
Are installed at regular intervals, and a plurality of slave repeaters 5b
Are arranged at regular intervals on the other side wall surface 3b so as to be located at an intermediate position of the slave station repeater 5a. Therefore, the slave station repeaters 5a and the slave station repeaters 5b are alternately arranged.
【００２３】そして、複数の子局中継器５ａは光ファイ
バ４ａを通じて親局中継器２に直列に接続されており、
複数の子局中継器５ｂは光ファイバ４ｂを通じて親局中
継器２に直列に接続されている。The plurality of slave repeaters 5a are connected in series to the master repeater 2 through the optical fiber 4a.
The plurality of slave repeaters 5b are connected in series to the master repeater 2 through the optical fiber 4b.
【００２４】この構成において、親局中継器２は移動体
通信基地局１からの電波を受信アンテナで受信すると、
受信信号を電気／光変換器で光信号に変換して光ファイ
バ４ａ、４ｂを通じて子局中継器５ａ、５ｂに伝送す
る。In this configuration, when the master station repeater 2 receives a radio wave from the mobile communication base station 1 with a receiving antenna,
The received signal is converted into an optical signal by an electric / optical converter and transmitted to the local repeaters 5a and 5b through the optical fibers 4a and 4b.
【００２５】子局中継器５ａ、５ｂは光信号を光復調器
で高周波信号に変換し、送信アンテナから輻射すること
で移動体通信基地局１とトンネル３内を移動する列車６
内の移動局７との無線接続を実現する。The local station repeaters 5a and 5b convert the optical signal into a high frequency signal by an optical demodulator, and radiate from a transmitting antenna to thereby make the train 6 move through the mobile communication base station 1 and the tunnel 3.
A wireless connection with the mobile station 7 within is realized.
【００２６】また、子局中継器５ａ、５ｂは移動局７か
らの電波を受信アンテナで受信すると、受信信号を光／
電気変換器で光信号に変換し、光ファイバ４ａ、４ｂを
通じて親局中継器２に伝送する。親局中継器２は光信号
を光復調器で高周波信号に変換し、送信アンテナから輻
射することで、または有線伝送路に出力することで移動
体通信基地局１に送信する。When the mobile station repeaters 5a and 5b receive a radio wave from the mobile station 7 by a receiving antenna, the mobile station repeaters 5a and 5b convert the received signal into an optical signal.
The signal is converted into an optical signal by an electric converter and transmitted to the master station repeater 2 through the optical fibers 4a and 4b. The master station repeater 2 converts the optical signal into a high-frequency signal using an optical demodulator, and transmits the high-frequency signal to the mobile communication base station 1 by radiating the signal from a transmission antenna or outputting the signal to a wired transmission path.
【００２７】このように、トンネル３の側壁面３ａ、３
ｂに子局中継器５ａ、５ｂを設けたことにより、トンネ
ル３内を列車６がすれ違った場合でも、側壁面３ａ側の
列車６内の移動局７は子局中継器５ａとの間で無線接続
され、側壁面３ｂ側の列車６内の移動局７は子局中継器
５ｂとの間で無線接続されることになる。As described above, the side wall surfaces 3a, 3a
b, the mobile stations 7 in the train 6 on the side wall 3a communicate with the mobile station repeaters 5a even if the trains 6 pass each other in the tunnel 3 by providing the mobile station repeaters 5a and 5b. The mobile station 7 in the train 6 on the side wall 3b side is wirelessly connected to the slave station repeater 5b.
【００２８】なお、子局中継器５ａ、５ｂの送信アンテ
ナおよび受信アンテナは、図示のように個別に設けても
よいし、送受信兼用アンテナを用いてもよい。なお、有
線伝送路として光ファイバを示したが、メタル線でも同
様の効果が得られる。The transmitting antennas and the receiving antennas of the slave station repeaters 5a and 5b may be individually provided as shown in the figure, or a transmitting / receiving antenna may be used. Although an optical fiber is shown as a wired transmission path, a similar effect can be obtained with a metal wire.
【００２９】（実施の形態２）図２は、本発明による無
線中継システムの実施の形態２を示す構成図で、前述の
実施の形態と同一の構成部分については同一符号を付し
て説明する。(Embodiment 2) FIG. 2 is a block diagram showing Embodiment 2 of a wireless relay system according to the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals. .
【００３０】本実施の形態は、実施の形態１の変形例で
あり、子局中継器５ａ、５ｂが有線伝送路である光ファ
イバ４を通じて親局中継器２に直列に接続された構成を
示している。This embodiment is a modification of the first embodiment, and shows a configuration in which slave repeaters 5a and 5b are connected in series to master repeater 2 through optical fiber 4 which is a wired transmission line. ing.
【００３１】子局中継器５ａと子局中継器５ｂとの間
は、トンネル３の天井に高圧架線が張ってあって光ファ
イバ４を敷設することができないため、床下に敷設した
光ファイバ４で接続することになる。この構成による
と、実施の形態１に比べて光ファイバ４が１本ですみ、
また、その長さを節約することができる。Since the high-voltage overhead line is stretched on the ceiling of the tunnel 3 and the optical fiber 4 cannot be laid between the slave station repeaters 5a and 5b, the optical fiber 4 laid under the floor is used. Will be connected. According to this configuration, only one optical fiber 4 is required as compared with the first embodiment,
In addition, the length can be saved.
【００３２】この構成においても、トンネル３内で列車
６がすれ違った場合に、トンネル３内の側壁面３ａ、３
ｂに設けた子局中継器５ａ、５ｂと双方の列車６内の移
動局７との間でそれぞれ無線接続されることになる。Also in this configuration, when the trains 6 pass each other in the tunnel 3, the side wall surfaces 3a, 3a
The wireless connection is established between the slave station repeaters 5a and 5b provided for the mobile station 7b and the mobile stations 7 in both trains 6.
【００３３】（実施の形態３）図３は、本発明による無
線中継システムの実施の形態３を示す構成図で、前述の
実施の形態と同一の構成部分については同一符号を付し
て説明する。(Embodiment 3) FIG. 3 is a block diagram showing a third embodiment of the wireless relay system according to the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals. .
【００３４】本実施の形態は、トンネル３の一方の側壁
面３ａに複数の子局中継器５を一定の間隔で設置し、こ
の子局中継器５を有線伝送路である光ファイバ４を通じ
て親局中継器２に直列に接続し、他方の側壁面３ｂに電
波反射板８を設置した構成を有している。また、子局中
継器５の間隔は通過する列車６の車長より長く設定して
ある。In this embodiment, a plurality of slave station repeaters 5 are installed on one side wall surface 3a of the tunnel 3 at regular intervals, and the slave station repeaters 5 are connected to each other through an optical fiber 4 which is a wire transmission line. It has a configuration in which it is connected in series to the station repeater 2 and a radio wave reflector 8 is provided on the other side wall surface 3b. The interval between the slave station repeaters 5 is set to be longer than the length of the passing train 6.
【００３５】この構成において、トンネル３内で列車６
同士がすれ違ったときに、双方の列車６が完全に重なっ
た状態でも、一方の子局中継器５と電波反射板８との間
が見通せるように電波反射板８の長さを設定すれば、側
壁面３ａ側の列車６で電波遮蔽される側壁面３ｂ側の列
車６内の移動局７と無線接続することができる。In this configuration, the train 6 in the tunnel 3
When the trains 6 pass each other, the length of the radio wave reflecting plate 8 is set so that the distance between one of the slave station repeaters 5 and the radio wave reflecting plate 8 can be seen even when both trains 6 are completely overlapped. The mobile station 7 in the train 6 on the side wall 3b which is shielded by the train 6 on the side wall 3a can be wirelessly connected.
【００３６】このように、トンネル３内の一方の側壁面
３ａに子局中継器５を設け、他方の側壁面３ｂに電波反
射板８を設けることにより、トンネル３内ですれ違う双
方の列車６内の移動局７とそれぞれ無線接続されること
になる。As described above, the local station repeater 5 is provided on one side wall 3a of the tunnel 3 and the radio wave reflecting plate 8 is provided on the other side wall 3b. Are wirelessly connected to the mobile station 7.
【００３７】（実施の形態４）図４は、本発明による無
線中継システムの実施の形態４を示す構成図で、前述の
実施の形態と同一の構成部分については同一符号を付し
て説明する。(Embodiment 4) FIG. 4 is a block diagram showing a fourth embodiment of the wireless relay system according to the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals. .
【００３８】本実施の形態は、実施の形態３の変形例で
あり、電波反射板８に代えて複数の無線中継器９を側壁
面３ｂに設置した構成を有している。無線中継器９は２
つの送受信兼用アンテナ９ａ、９ｂを備えており、一方
のアンテナで受信した無線信号を他方のアンテナから輻
射する構成を備えている。This embodiment is a modification of the third embodiment, and has a configuration in which a plurality of radio repeaters 9 are provided on the side wall surface 3b instead of the radio wave reflection plate 8. Radio repeater 9 is 2
It has two transmitting / receiving antennas 9a and 9b, and has a configuration in which a radio signal received by one antenna is radiated from the other antenna.
【００３９】この構成において、トンネル３内で列車６
同士がすれ違ったときに、双方の列車６が完全に重なっ
た状態でも、一方の子局中継器５との間が見通せるよう
に無線中継器９を設置することにより、側壁面３ａ側の
列車６で電波遮蔽される側壁面３ｂ側の列車６内の移動
局７と無線接続することができる。In this configuration, the train 6 in the tunnel 3
When the trains pass each other, even if both trains 6 are completely overlapped with each other, the wireless repeater 9 is installed so that the train repeater 5 can be seen from one of the slave repeaters 5, so that the train 6 on the side wall surface 3a can be seen. Wireless connection with the mobile station 7 in the train 6 on the side wall surface 3b, which is shielded by radio waves.
【００４０】このように、トンネル３内の一方の側壁面
３ａに子局中継器５を設け、他方の側壁面３ｂに無線中
継器９を設けることにより、トンネル３内ですれ違う双
方の列車６内の移動局７とそれぞれ無線接続されること
になる。As described above, the local station repeater 5 is provided on one side wall 3a of the tunnel 3 and the wireless repeater 9 is provided on the other side wall 3b. Are wirelessly connected to the mobile station 7.
【００４１】（実施の形態５）図５は、本発明による無
線中継システムの実施の形態５を示す構成図で、前述の
実施の形態と同一の構成部分については同一符号を付し
て説明する。(Embodiment 5) FIG. 5 is a block diagram showing Embodiment 5 of a wireless relay system according to the present invention. The same components as those in the above-mentioned embodiment are denoted by the same reference numerals. .
【００４２】本実施の形態は、トンネル３の側壁面３ａ
に一定の間隔で複数の子局中継器５を設置し、その中間
点に受信専用の受信中継器１０を設置し、子局中継器５
および受信中継器１０を有線伝送路である光ファイバ４
を通じて親局中継器２に直列に接続した構成を有してい
る。In this embodiment, the side wall 3a of the tunnel 3
A plurality of slave repeaters 5 are installed at regular intervals, and a receive-only receive repeater 10 is installed at an intermediate point between the slave repeaters 5.
And the receiving repeater 10 is connected to the optical fiber 4 as a wired transmission path.
, And connected in series to the master station repeater 2.
【００４３】この構成によると、子局中継器５はある程
度離れた間隔で設置しても送信レベルを上げることで離
れた地点の移動局７に対しても十分な受信レベルの電波
を送信することができ、移動局７は送信レベルを上げに
くいため、子局中継器５の間に受信中継器１０を設ける
ことで子局中継器５側の受信レベルを確保することがで
きる。According to this configuration, even if the slave station repeaters 5 are installed at a certain interval, the transmission level is increased to transmit a radio wave of a sufficient reception level to the mobile station 7 at a distant point. Since it is difficult for the mobile station 7 to increase the transmission level, the reception level of the slave station repeater 5 can be ensured by providing the reception repeater 10 between the slave station repeaters 5.
【００４４】なお、この実施の形態では側壁面３ａ側に
のみ子局中継器５および受信中継器１０を設置した場合
について示したが、側壁面３ｂ側にも子局中継器５およ
び受信中継器１０を設置してもよい。In this embodiment, the case where the slave station repeater 5 and the receiving repeater 10 are installed only on the side wall surface 3a is shown, but the slave station repeater 5 and the receiving repeater are also installed on the side wall surface 3b side. 10 may be installed.
【００４５】（実施の形態６）図６は、本発明による無
線中継システムの実施の形態６を示す構成図で、前述の
実施の形態と同一の構成部分については同一符号を付し
て説明する。(Embodiment 6) FIG. 6 is a block diagram showing a sixth embodiment of the wireless relay system according to the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals. .
【００４６】本実施の形態は、実施の形態５の変形例で
あり、受信中継器１０に代えて受信アンテナ１１を設
け、この受信アンテナ１１を隣接する子局中継器５の一
方にケーブル１２を通じて接続した構成を示している。This embodiment is a modification of the fifth embodiment. A receiving antenna 11 is provided instead of the receiving repeater 10, and the receiving antenna 11 is connected to one of the adjacent local repeaters 5 through a cable 12. This shows a connected configuration.
【００４７】この構成においても、子局中継器５はある
程度離れた間隔で設置しても送信レベルを上げることで
離れた地点の移動局７に対しても十分な受信レベルの電
波を送信することができ、移動局７は送信レベルを上げ
にくいため、子局中継器５の間に受信アンテナ１１を設
けることで子局中継器５側の受信レベルを確保すること
ができる。Even in this configuration, even if the slave station repeaters 5 are installed at a certain distance, the transmission level is increased to transmit radio waves of a sufficient reception level to the mobile station 7 at a distant point. Since the mobile station 7 hardly raises the transmission level, by providing the receiving antenna 11 between the slave repeaters 5, the reception level of the slave repeater 5 can be secured.
【００４８】（実施の形態７）図７は、本発明による無
線中継システムの実施の形態７を示す構成図で、前述の
実施の形態と同一の構成部分については同一符号を付し
て説明する。(Embodiment 7) FIG. 7 is a block diagram showing Embodiment 7 of a wireless relay system according to the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals. .
【００４９】本実施の形態は、電波不感地帯であるトン
ネル３の出入口近傍の外側に外部子局中継器１３を設置
し、有線伝送路である光ファイバ１４を通じて親局中継
器２に接続した構成を有している。その他の構成は実施
の形態１と同一である。In this embodiment, an external slave station repeater 13 is installed outside the entrance / exit of the tunnel 3 which is a radio wave insensitive zone, and is connected to the master station repeater 2 through an optical fiber 14 which is a wire transmission line. have. Other configurations are the same as those of the first embodiment.
【００５０】この構成によると、外部子局中継器１３は
トンネル３の外部と内部との境界を通過する移動局７の
チャンネル切替領域を形成しており、移動局７がトンネ
ル３の外部から内部に、または内部から外部に移動する
ときに、移動体通信基地局１と外部子局中継器１３との
間でチャンネル切り替えを行うので、外部子局中継器１
３が無い場合に比べ、無線通信が中断する確率が低い状
態でスムーズに切り替えることができる。According to this configuration, the external slave station repeater 13 forms a channel switching area of the mobile station 7 that passes through the boundary between the outside and the inside of the tunnel 3. Or when the mobile station moves from the inside to the outside, the channel is switched between the mobile communication base station 1 and the external slave station repeater 13.
Switching can be performed more smoothly in a state where the probability of interruption of wireless communication is lower than in the case where there is no 3.
【００５１】なお、この実施の形態では側壁面３ａ側に
のみ子局中継器５を設置した場合について示したが、側
壁面３ｂ側にも子局中継器５を設置してもよい。In this embodiment, the case where the slave station repeater 5 is installed only on the side wall surface 3a is shown, but the slave station repeater 5 may be installed also on the side wall surface 3b side.
【００５２】[0052]
【発明の効果】以上説明したように、本発明は電波不感
地帯の両側壁面に複数の子局中継器を設けたので、電波
不感地帯を列車のような電波遮蔽物がすれ違っても、子
局中継器と列車内の移動局との間で良好な無線通信を行
うことができ、また複数の子局中継器を両側壁面に交互
に配置することにより、少ない数の子局中継器で電波不
感地帯をカバーできる無線中継システムを提供すること
ができるものである。As described above, according to the present invention, a plurality of slave station repeaters are provided on both side walls of the radio wave insensitive zone. Good wireless communication can be performed between the repeater and mobile stations in the train.Also, by arranging multiple slave repeaters alternately on both side walls, a small number of slave repeaters can reduce the radio wave dead zone. It is possible to provide a wireless relay system that can be covered.
【図１】本発明による無線中継システムの実施の形態１
を示す構成図FIG. 1 is a first embodiment of a wireless relay system according to the present invention;
Configuration diagram showing
【図２】本発明による無線中継システムの実施の形態２
を示す構成図FIG. 2 is a second embodiment of the wireless relay system according to the present invention;
Configuration diagram showing
【図３】本発明による無線中継システムの実施の形態３
を示す構成図FIG. 3 is a wireless relay system according to a third embodiment of the present invention;
Configuration diagram showing
【図４】本発明による無線中継システムの実施の形態４
を示す構成図FIG. 4 is a wireless relay system according to a fourth embodiment of the present invention;
Configuration diagram showing
【図５】本発明による無線中継システムの実施の形態５
を示す構成図FIG. 5 is a wireless relay system according to a fifth embodiment of the present invention;
Configuration diagram showing
【図６】本発明による無線中継システムの実施の形態６
を示す構成図FIG. 6 is a wireless relay system according to a sixth embodiment of the present invention;
Configuration diagram showing
【図７】本発明による無線中継システムの実施の形態７
を示す構成図FIG. 7 is a wireless relay system according to a seventh embodiment of the present invention;
Configuration diagram showing
１ 移動体通信基地局 ２ 親局中継器 ３ トンネル（電波不感地帯） ４、４ａ、４ｂ、１４ 光ファイバ（有線伝送路） ５、５ａ、５ｂ 子局中継器 ６ 列車 ７ 移動局 ８ 電波反射板 ９ 無線中継器 １０ 受信中継器 １１ 受信アンテナ １２ ケーブル １３ 外部子局中継器 Reference Signs List 1 mobile communication base station 2 master station repeater 3 tunnel (radio wave insensitive zone) 4, 4a, 4b, 14 optical fiber (wired transmission line) 5, 5a, 5b slave repeater 6 train 7 mobile station 8 radio wave reflector 9 Wireless repeater 10 Receiving repeater 11 Receiving antenna 12 Cable 13 External slave repeater
───────────────────────────────────────────────────── フロントページの続き (72)発明者 駒木 淳 神奈川県横浜市港北区綱島東四丁目３番１ 号 松下通信工業株式会社内 Ｆターム(参考） 5K067 AA22 BB02 BB43 EE02 EE06 EE10 EE44 5K072 AA29 BB13 BB27 CC02 DD11 DD16 DD17 GG12 GG13 GG14 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Atsushi Komagaki 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 5K067 AA22 BB02 BB43 EE02 EE06 EE10 EE44 5K072 AA29 BB13 BB27 CC02 DD11 DD16 DD17 GG12 GG13 GG14
Claims (6)
信基地局との間で信号送受信を行い信号を変換する親局
中継器と、 前記親局中継器に有線伝送路を通じて接続され前記親局
中継器からの信号を受信し無線信号に変換して輻射する
と共に移動局からの無線信号を受信・変換し前記有線伝
送路を通じて前記親局中継器に送信する複数の子局中継
器とを備え、 前記複数の子局中継器が前記電波不感地帯内の両側壁面
に交互に一定間隔で設置されていることを特徴とする無
線中継システム。1. A master station repeater installed outside a radio wave insensitive zone for transmitting / receiving a signal to / from a mobile communication base station and converting a signal, the master station relay being connected to the master station repeater through a wired transmission line, and A plurality of slave repeaters for receiving signals from the office repeater, converting them to radio signals, radiating the signals, and receiving and converting the radio signals from the mobile stations, and transmitting the received signals to the master repeater through the wired transmission path. A wireless relay system, wherein the plurality of slave repeaters are alternately arranged at constant intervals on both side walls in the radio wave insensitive zone.
信基地局との間で信号送受信を行い信号を変換する親局
中継器と、 前記親局中継器に有線伝送路を通じて接続され前記親局
中継器からの信号を受信し無線信号に変換して輻射する
と共に移動局からの無線信号を受信・変換し前記有線伝
送路を通じて前記親局中継器に送信する複数の子局中継
器とを備え、 前記複数の子局中継器が前記電波不感地帯内の一方の側
壁面に一定間隔で設置され、他方の側壁面に無線信号を
反射する電波反射板が設置されていることを特徴とする
無線中継システム。2. A base station repeater which is installed outside a radio wave insensitive zone and transmits / receives a signal to / from a mobile communication base station and converts a signal, and is connected to the base station repeater via a wired transmission line to connect to the base station repeater. A plurality of slave repeaters for receiving signals from the office repeater, converting them to radio signals, radiating the signals, and receiving and converting the radio signals from the mobile stations, and transmitting the received signals to the master repeater through the wired transmission path. Wherein the plurality of slave station repeaters are installed at regular intervals on one side wall surface in the radio wave insensitive zone, and a radio wave reflecting plate for reflecting a radio signal is installed on the other side wall surface. Wireless relay system.
信基地局との間で信号送受信を行い信号を変換する親局
中継器と、 前記親局中継器に有線伝送路を通じて接続され前記親局
中継器からの信号を受信し無線信号に変換して輻射する
と共に移動局からの無線信号を受信・変換し前記有線伝
送路を通じて前記親局中継器に送信する複数の子局中継
器とを備え、 前記複数の子局中継器が前記電波不感地帯内の一方の側
壁面に一定間隔で設置され、他方の側壁面に無線信号を
受信して再送信する無線中継器が設置されていることを
特徴とする無線中継システム。3. A master station repeater which is installed outside a radio wave insensitive zone and transmits / receives a signal to / from a mobile communication base station and converts a signal, the master station relay being connected to the master station relay via a wired transmission path, and A plurality of slave repeaters for receiving signals from the office repeater, converting them to radio signals, radiating the signals, and receiving and converting the radio signals from the mobile stations, and transmitting the received signals to the master repeater through the wired transmission path. The plurality of slave station repeaters are installed at a constant interval on one side wall surface in the radio wave dead zone, and a wireless repeater that receives and retransmits a radio signal is installed on the other side wall surface. A wireless relay system characterized by the above.
帯内の一方の側壁面に前記電波不感地帯内に存在し得る
電波遮蔽物より長い間隔をもって設置されていることを
特徴とする請求項２または３に記載の無線中継システ
ム。4. The mobile station repeater according to claim 1, wherein the plurality of slave repeaters are installed on one side wall surface in the radio wave insensitive zone at a longer interval than a radio wave shield that may exist in the radio wave insensitive zone. Item 4. The wireless relay system according to item 2 or 3.
で設置された前記複数の子局中継器の中間位置に、受信
専用の受信器が設置されていることを特徴とする請求項
１ないし３いずれか１項に記載の無線中継システム。5. A receiving-only receiver is installed at an intermediate position between the plurality of slave repeaters installed at regular intervals on a side wall surface in the radio wave insensitive zone. 4. The wireless relay system according to any one of claims 3 to 3.
設置され前記親局中継器に有線伝送路を通じて接続され
た外部中継器を有し、前記外部中継器によって開空間移
動体通信基地局エリアとのチャンネル切替領域を形成し
たことを特徴とする請求項１ないし３いずれか１項に記
載の無線中継システム。6. An open space mobile communication base station area which is provided outside the entrance / exit of the radio wave insensitive zone and connected to the master station repeater through a wired transmission line. The wireless relay system according to any one of claims 1 to 3, wherein a channel switching area is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000160588A JP2001339337A (en) | 2000-05-30 | 2000-05-30 | Wireless relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000160588A JP2001339337A (en) | 2000-05-30 | 2000-05-30 | Wireless relay system |
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| Publication Number | Publication Date |
|---|---|
| JP2001339337A true JP2001339337A (en) | 2001-12-07 |
Family
ID=18664755
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000160588A Pending JP2001339337A (en) | 2000-05-30 | 2000-05-30 | Wireless relay system |
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| Country | Link |
|---|---|
| JP (1) | JP2001339337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006186872A (en) * | 2004-12-28 | 2006-07-13 | Japan Telecom Co Ltd | Wireless lan system communicating with train |
-
2000
- 2000-05-30 JP JP2000160588A patent/JP2001339337A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006186872A (en) * | 2004-12-28 | 2006-07-13 | Japan Telecom Co Ltd | Wireless lan system communicating with train |
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