JP5247523B2 - Information transmission system between ground and vehicle - Google Patents

Information transmission system between ground and vehicle Download PDF

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JP5247523B2
JP5247523B2 JP2009036470A JP2009036470A JP5247523B2 JP 5247523 B2 JP5247523 B2 JP 5247523B2 JP 2009036470 A JP2009036470 A JP 2009036470A JP 2009036470 A JP2009036470 A JP 2009036470A JP 5247523 B2 JP5247523 B2 JP 5247523B2
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哲也 高田
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Kyosan Electric Manufacturing Co Ltd
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Description

この発明は、軌道回路を使用しないで無線を利用した列車制御における地上・車上間情報伝送システム、特にネットワーク構築の簡略化に関するものである。   The present invention relates to a ground-on-vehicle information transmission system in train control using radio without using a track circuit, and more particularly to simplification of network construction.

軌道回路を使用しないで無線を利用した列車制御システムにおいては、地上に設けられた基地局と車上装置との間で無線通信により情報を伝送する無線列車制御システムが特許文献１や特許文献２に開示されている。この地上装置と車上装置間の無線通信には、図３（ａ）に示すように、地上装置１に接続される複数のアクセスポイント４ａ〜４ｅに対して列車２に搭載された車上装置３に接続されている車上無線局６を無線リンクで接続し、アクセスポイント４ａ〜４ｅ間を例えば光ケーブルによる有線ネットワークで接続しているシングルホップ接続が広く使用されている。また、アクセスポイント４ａ〜４ｅ間の干渉を抑えるために、図３（ｂ）に示すように、アクセスポイント４ａ〜４ｅのアンテナに代えて漏洩同軸ケーブル（ＬＣＸ）を使用する場合もある。   In a train control system using radio without using a track circuit, a radio train control system that transmits information by radio communication between a base station provided on the ground and an on-board device is disclosed in Patent Literature 1 and Patent Literature 2. Is disclosed. For wireless communication between the ground device and the on-vehicle device, as shown in FIG. 3A, the on-vehicle device mounted on the train 2 with respect to the plurality of access points 4a to 4e connected to the ground device 1. A single-hop connection is widely used in which the on-board wireless station 6 connected to 3 is connected by a wireless link and the access points 4a to 4e are connected by a wired network such as an optical cable. In order to suppress interference between the access points 4a to 4e, a leaky coaxial cable (LCX) may be used instead of the antenna of the access points 4a to 4e as shown in FIG.

一方、メッシュネットワークの構成では、図４に示すように、アクセスポイント４ａ，４ｂ間の接続や中継局５ａ〜５ｃと車上無線局６間の接続も無線リンクで接続し、複数の無線リンクをパケットが中継するマルチホップ接続が使用されている。   On the other hand, in the configuration of the mesh network, as shown in FIG. 4, the connection between the access points 4a and 4b and the connection between the relay stations 5a to 5c and the on-board radio station 6 are also connected by a radio link, and a plurality of radio links are connected. A multi-hop connection that relays packets is used.

列車制御システムで地上装置と車上装置間で情報伝送を行うためにシングルホップ接続を使用した場合、列車が走行する線路に沿ってアクセスポイントの電波到達距離内に次のアクセスポイントを設置し、各アクセスポイントを有線で接続する必要があり、ネットワークを構築することが容易でなかった。   When a single-hop connection is used to transmit information between the ground device and the on-board device in the train control system, the next access point is installed within the radio wave reach of the access point along the track on which the train runs, It was necessary to connect each access point by wire, and it was not easy to construct a network.

また、マルチホップ接続を使用した場合、アクセスポイントと中継局の接続に有線接続は不要であり、ネットワークの構築は容易であるが、中継局の電波到達距離の関係から、図５に示すように、中継局５ａ〜５ｃを列車２が走行する線路に沿って網の目のように設置しなければならなく、中継局の数が多くなるという問題が発生してしまう。   In addition, when multi-hop connection is used, a wired connection is not necessary for connection between the access point and the relay station, and the network is easy to construct. However, as shown in FIG. The relay stations 5a to 5c must be installed like a mesh along the track on which the train 2 travels, which causes a problem that the number of relay stations increases.

この発明は、このような問題を解消し、ネットワークの構築を容易にするとともに中継局の数を増やさずに、地上装置と車上装置間で安定して情報を伝送することができる地上・車上間情報伝送システムを提供することを目的とするものである。   The present invention solves such problems, facilitates the construction of a network, and can stably transmit information between the ground device and the on-board device without increasing the number of relay stations. The object is to provide an upper information transmission system.

この発明の地上・車上間情報伝送システムは、地上装置に有線で接続され、駅毎に設けられた複数のアクセスポイントと、駅の間の中間に設けられた中継局と、列車に搭載された車上装置に接続された車上無線局とで構成され、アクセスポイント同士が中継局を介して漏洩同軸ケーブルで接続され、アクセスポイントが、漏洩同軸ケーブルを介して車上無線局と無線リンクするものであり、車上無線局は、漏洩同軸ケーブルに接続されている少なくとも２つのアクセスポイントに無線リンクすることを特徴とする。 The ground-to-vehicle information transmission system according to the present invention is connected to a ground device in a wired manner, and is mounted on a train, a plurality of access points provided for each station, a relay station provided between the stations, and a train. The access point is connected with a leaky coaxial cable via a relay station , and the access point is wirelessly linked to the onboard radio station via the leaky coaxial cable. The on-board wireless station wirelessly links to at least two access points connected to the leaky coaxial cable .

前記車上無線局のアンテナは、前記漏洩同軸ケーブルに近接して配置され、前記漏洩同軸ケーブルとの間で近接通信することを特徴とする。   The antenna of the on-board radio station is disposed close to the leaky coaxial cable, and performs close proximity communication with the leaky coaxial cable.

この発明は、地上装置に有線で接続されて駅毎に設けられた複数のアクセスポイントと駅の間の中間に設けられた中継局とを漏洩同軸ケーブルで接続し、アクセスポイントと中継局は車上無線局と無線リンクした接続を構築することにより、アクセスポイントと中継局は複数ルーティングパスを確保することができ、障害発生時や電波環境の変化に対して柔軟に地上装置と車上装置間のパスを変更することができ、安定性を高めることができる。 According to the present invention, a plurality of access points connected to a ground device by wire are connected to a relay station provided in the middle between stations by a leaky coaxial cable, and the access point and the relay station are connected to a vehicle. By establishing a wireless link connection with the upper radio station, the access point and relay station can secure multiple routing paths, flexibly between the ground device and the on-board device when a failure occurs or the radio wave environment changes. The path can be changed and stability can be improved.

また、各アクセスポイントと中継局の間を漏洩同軸ケーブルで接続することにより、各アクセスポイント間で確実に通信できる。 Further, by connecting each access point and the relay station with a leaky coaxial cable, it is possible to reliably communicate between each access point .

さらに、車上無線局のアンテナを漏洩同軸ケーブルに近接して設けて、車上無線局のアンテナと漏洩同軸ケーブルの間で近接通信することにより、空間波通信の弱点である外来ノイズの影響を抑えて地上装置と車上装置の間で安定して情報を授受することができる。   In addition, by installing the on-board radio station antenna close to the leaky coaxial cable and performing near field communication between the on-board radio station antenna and the leaky coaxial cable, the effects of external noise, which is a weak point of spatial wave communication, can be reduced. It is possible to stably transfer information between the ground device and the on-board device.

この発明の地上・車上間情報伝送システムの構成図である。It is a block diagram of the information transmission system between the ground and the vehicle of this invention. 車上無線局のアンテナの漏洩同軸ケーブルに対する配置図である。It is an arrangement plan for the leaky coaxial cable of the antenna of the on-board radio station. シングルホップ接続を示す構成図である。It is a block diagram which shows a single hop connection. マルチホップ接続を示す構成図である。It is a block diagram which shows multihop connection. 地上装置と車上装置間の情報伝送に従来のマルチホップ接続を使用した場合の構成図である。It is a block diagram at the time of using the conventional multihop connection for the information transmission between a ground apparatus and a vehicle-mounted apparatus.

図１はこの発明の地上装置１と列車２に搭載された車上装置３との間で軌道回路を使用しないで無線を利用して情報を伝送する地上・車上間情報伝送システムの構成図である。図に示すように、情報伝送システムは、地上装置１に有線で接続され、駅毎に設けられたアクセスポイント（ＡＰ）４ａ，４ｂ，４ｃと、駅の間の中間に設けられた中継局（ＭＷＲ）５ａ，５ｂと、列車２に搭載された車上装置３に接続された車上無線局６とで構成されている。各アクセスポイント４ａ，４ｂ，４ｃと中継局５ａ，５ｂの間は漏洩同軸ケーブル（ＬＣＸ）７で接続され、各アクセスポイント４ａ，４ｂ，４ｃと中継局５ａ，５ｂは漏洩同軸ケーブル７を介して車上無線局６と無線リンクした接続を構築している。 FIG. 1 is a block diagram of a ground-to-vehicle information transmission system that transmits information using radio without using a track circuit between a ground device 1 and an on-vehicle device 3 mounted on a train 2 of the present invention. It is. As shown in the figure, the information transmission system is connected to the ground device 1 by wire, and the access points (AP) 4a, 4b, 4c provided for each station and a relay station (middle between the stations) MWR) 5a and 5b, and an on-board radio station 6 connected to an on-board device 3 mounted on the train 2. Each access point 4a, 4b, 4c and relay station 5a, 5b are connected by a leaky coaxial cable (LCX) 7, and each access point 4a, 4b, 4c and relay station 5a, 5b are connected via a leaky coaxial cable 7. A connection with a radio link with the on-board radio station 6 is established.

車上無線局６のアンテナ８は、図２の車両構造図に示すように、車両９を案内するガイド１０の上部に配置された漏洩同軸ケーブル７に近接して車両９の下部に設けられている。   As shown in the vehicle structure diagram of FIG. 2, the antenna 8 of the on-board radio station 6 is provided in the lower portion of the vehicle 9 in the vicinity of the leaky coaxial cable 7 disposed on the upper portion of the guide 10 that guides the vehicle 9. Yes.

この情報伝送システムで車上装置３は列車位置情報を車上無線局６により地上に送信する。この送信されている列車位置情報は漏洩同軸ケーブル７をアンテナとしてアクセスポイント４で受信して地上装置１で取得する。地上装置１は取得した列車位置情報を基に列車２の間隔を認識して各列車２の進行可能範囲を算出して車上装置３に送信して列車制御を行う。 In this information transmission system, the onboard device 3 transmits train position information to the ground by the onboard radio station 6. The transmitted train position information is received by the access point 4 using the leaky coaxial cable 7 as an antenna and acquired by the ground device 1. The ground device 1 recognizes the interval between the trains 2 on the basis of the acquired train position information, calculates the travelable range of each train 2 and transmits it to the on-board device 3 to perform train control.

この車上装置３と地上装置１で情報を授受するとき、各アクセスポイント４と中継局５は漏洩同軸ケーブル７を介して車上無線局６と無線リンクした接続を構築して、アクセスポイント４と中継局５の間はそれぞれリンクを取る形で設置されているから、アクセスポイント４と中継局５は複数ルーティングパスを確保することができ、漏洩同軸ケーブル７の断線を含む障害発生時や電波環境の変化に対して柔軟に地上装置１と車上装置３間のパスを変更することができ、安定性を高めることができる。 When information is exchanged between the on-board device 3 and the ground device 1, each access point 4 and the relay station 5 establish a connection wirelessly linked to the on-board radio station 6 via the leaky coaxial cable 7, and the access point 4 And the relay station 5 are linked to each other, so that the access point 4 and the relay station 5 can secure a plurality of routing paths. The path between the ground device 1 and the on-vehicle device 3 can be changed flexibly with respect to environmental changes, and stability can be improved.

また、各アクセスポイント４と中継局５の間を漏洩同軸ケーブル７で接続しているから、各アクセスポイント４間で確実に通信できる。 Further, since each access point 4 and the relay station 5 are connected by the leaky coaxial cable 7, it is possible to reliably communicate between each access point 4 .

また、車上無線局６のアンテナ８は漏洩同軸ケーブル７に近接して設けているから、車上無線局６のアンテナ８と漏洩同軸ケーブル７の間で近接通信でき、空間波通信の弱点である外来ノイズの影響を抑えて地上装置１と車上装置３の間で安定して情報を授受することができる。   In addition, since the antenna 8 of the on-board radio station 6 is provided close to the leaky coaxial cable 7, close communication can be performed between the antenna 8 of the on-board radio station 6 and the leaky coaxial cable 7, which is a weak point of space wave communication. Information can be stably exchanged between the ground device 1 and the on-board device 3 while suppressing the influence of certain external noise.

１；地上装置、２；列車、３；車上装置、４；アクセスポイント、５；中継局、６；車上無線局、７；漏洩同軸ケーブル、８；車上無線局のアンテナ。   DESCRIPTION OF SYMBOLS 1; Ground apparatus, 2; Train, 3; On-board apparatus, 4; Access point, 5; Relay station, 6: On-board radio station, 7: Leaky coaxial cable, 8: On-board radio station antenna.

特開２０００−１６５３１２号公報JP 2000-166531 A 特開２００９−１２４８９号公報JP 2009-12489 A

Claims (2)

地上装置に有線で接続され、駅毎に設けられた複数のアクセスポイントと、駅の間の中間に設けられた中継局と、列車に搭載された車上装置に接続された車上無線局とで構成され、
前記アクセスポイント同士が前記中継局を介して漏洩同軸ケーブルで接続され、
前記アクセスポイントが、前記漏洩同軸ケーブルを介して前記車上無線局と無線リンクするものであり、
前記車上無線局は、前記漏洩同軸ケーブルに接続されている少なくとも２つの前記アクセスポイントに無線リンクすることを特徴とする地上・車上間情報伝送システム。 A plurality of access points connected to the ground device by wire, provided at each station, a relay station provided between the stations, and an on-board radio station connected to the on-board device mounted on the train Consists of
The access points are connected by a leaky coaxial cable through the relay station,
The access point is a radio link with the on-board radio station via the leaky coaxial cable,
The on-vehicle wireless station wirelessly links to at least two access points connected to the leaky coaxial cable, and the information transmission system between the ground and the vehicle. 前記車上無線局のアンテナは、前記漏洩同軸ケーブルに近接して配置され、前記漏洩同軸ケーブルとの間で近接通信する請求項１記載の地上・車上間情報伝送システム。   The terrestrial / on-vehicle information transmission system according to claim 1, wherein an antenna of the on-board radio station is disposed in proximity to the leaky coaxial cable and performs close proximity communication with the leaky coaxial cable.
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JP5847451B2 (en) * 2011-06-21 2016-01-20 株式会社東芝 Ground control device, ground control method, and communication method in train control system
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