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JP5238570B2 - Railway vehicle transmission system - Google Patents
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JP5238570B2 - Railway vehicle transmission system - Google Patents

Railway vehicle transmission system Download PDF

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JP5238570B2
JP5238570B2 JP2009073270A JP2009073270A JP5238570B2 JP 5238570 B2 JP5238570 B2 JP 5238570B2 JP 2009073270 A JP2009073270 A JP 2009073270A JP 2009073270 A JP2009073270 A JP 2009073270A JP 5238570 B2 JP5238570 B2 JP 5238570B2
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transmission
data
mode
repeater
received
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JP2010226565A (en
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秀之 高橋
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Toshiba Corp
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Priority to PCT/JP2010/055055 priority patent/WO2010110300A1/en
Priority to CN201080012958.2A priority patent/CN102362466B/en
Priority to DE112010002652.1T priority patent/DE112010002652B4/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40293—Bus for use in transportation systems the transportation system being a train

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Description

本発明は、列車の制御指令は低遅延モードで伝送し、サービス情報データは全二重モードに切り換えて伝送する鉄道車両用伝送システムに関する。   The present invention relates to a railway vehicle transmission system that transmits a train control command in a low-delay mode and transmits service information data by switching to a full-duplex mode.

列車内でネットワークを構築する場合、扱う伝送データは伝送遅延やデータの衝突による再送遅延が許されない列車の制御指令と伝送遅延がある程度許容されるサービス情報データとの２種類に大きく分けられる。伝送遅延が規定されているデータである列車の制御指令としては、列車の走行を制御する力行／ブレーキ指令等が相当する。また、サービス情報データとしては、各機器のモニタリングデータや乗客への案内表示データ等がある。   When a network is built in a train, the transmission data to be handled is roughly divided into two types: a train control command that does not allow retransmission delay due to transmission delay or data collision, and service information data that allows transmission delay to some extent. The train control command, which is data for which transmission delay is specified, corresponds to a power running / brake command for controlling the running of the train. The service information data includes monitoring data for each device, guidance display data for passengers, and the like.

従来の鉄道車両用伝送システムでは、伝送遅延が規定される制御指令については専用の引き通し線を用いたり、伝送路を分離／専用化する等して伝送遅延を短縮する方式がとられているが、これらは引き通し線の増加や伝送チャンネルの追加を招く問題点があり、特に既存のネットワークのソフトウェアの変更だけで対応できる技術の開発が望まれていた。   Conventional transmission systems for railway vehicles use a method for shortening transmission delay by using a dedicated through line or by separating / dedicated transmission lines for control commands that define transmission delay. However, these have problems that lead to an increase in the number of lead-through lines and the addition of transmission channels, and in particular, it has been desired to develop a technology that can be dealt with only by changing the software of the existing network.

一方、例えば、特開２００５−３９７８３号公報（特許文献１）に記載されているシステムのように、汎用のネットワークの代表であるＩＥＥＥ８０２．３規格で規定されるイーサネット（登録商標）、つまりツイストペアケーブルを使用する１０Ｂａｓｅ−Ｔ／１００Ｂａｓｅ−ＴＸ等を鉄道車両に適用する場合、ＣＳＭＡ／ＣＤ方式のイーサネット（登録商標）では、基本的にデータの衝突を許し、衝突発生時にはデータを再送する伝送方式であるため、列車の制御指令のような伝送遅延が許されないシステムへの適用が難しい。また、データの衝突を回避するため回線を全二重とし、スイッチングＨＵＢを使用する方法も用いられているが、その場合にも、スイッチングＨＵＢがストア・アンド・フォワードにて動作するためスイッチングＨＵＢを通過するたびにデータが遅延してしまう問題点があり、列車の制御指令のような伝送遅延が許されないデータを伝送するシステムへの適用が難しかった。   On the other hand, for example, as in the system described in Japanese Patent Application Laid-Open No. 2005-37983 (Patent Document 1), Ethernet (registered trademark) defined by the IEEE 802.3 standard representing a general-purpose network, that is, a twisted pair cable. When using 10Base-T / 100Base-TX, etc., that uses the CSMA / CD, Ethernet (registered trademark) of the CSMA / CD system basically allows data collisions and retransmits data when a collision occurs. Therefore, it is difficult to apply to a system that does not allow transmission delay such as train control commands. Moreover, in order to avoid data collision, a method of using full-duplex lines and a switching HUB is also used. However, in this case, since the switching HUB operates in store-and-forward, the switching HUB is used. There is a problem that data is delayed every time it passes, and it has been difficult to apply it to a system that transmits data such as a train control command that does not allow transmission delay.

特開２００５−３９７８３号公報JP 2005-37983 A

本発明は、上述した従来技術の問題点に鑑みてなされたもので、列車の制御指令のような遅延が許されないデータの伝送には伝送遅延時間を最短にし、ある程度の遅延が許容されるサービス情報データの伝送には伝送回線の帯域を有効に活用することにより、複数種の伝送データをそれらの種類によって最適な伝送モードに切り換えて伝送することができる鉄道車両用伝送システムを提供することを目的とする。   The present invention has been made in view of the above-mentioned problems of the prior art, and is a service in which a transmission delay time is minimized and a certain amount of delay is allowed for transmission of data such as a train control command that does not allow a delay. To provide a transmission system for a railway vehicle that can transmit a plurality of types of transmission data by switching to an optimum transmission mode depending on the type by effectively utilizing the bandwidth of the transmission line for the transmission of information data. Objective.

本発明は、各車両に搭載され他の車両から伝送されてきたデータを受信すると共に、受信したデータを送信する伝送中継器と、前記各車両の伝送中継器間を接続する幹線伝送路と、前記他の車両の伝送中継器とデータの送信を行う幹線伝送送信器及びデータの受信を行う幹線伝送受信器と、隣接する伝送中継器間に送信権の交換と受信データのリピート送信、バッファへのデータの記憶及びバッファに記憶されたデータの送信を行いネットワークを構築する伝送中継器制御装置と、前記伝送中継器制御装置とデータの送受信を行う伝送送受信器と、前記伝送送受信器に接続されデータの授受を行う伝送局とを備えた鉄道車両用伝送システムにおいて、一端の車両の伝送中継器制御装置は、所定の周期で繰り返され、送信権を得た伝送中継器が第１のデータの送信を行なうとともに他の伝送中継器は受信した第１のデータのリピート送信を行なう第１のモードを実行する第１の期間と、この第１の期間に後続し、前記各車両の伝送中継器が任意のタイミングで第２のデータの送受信を行なう第２のモードを実行する第２の期間とを含む送信制御期間のうち、前記第１の期間の開始を指示するための第１のコマンドを送信し、前記第１のコマンドを送信した後、前記第１のモードに設定し、第１のデータの送信が終了すると送信権を隣接する伝送中継器へ送信し、前記第１の期間の終了を示す第２のコマンドを受信すると、前記第２のモードに設定して第２のデータを送受信し、他端の車両の伝送中継制御装置は、前記第１のコマンドを受信すると、前記第１のモードに設定するとともに、前記送信権を得ると第１のデータの送信し、この第１のデータの送信が終了すると、前記一端の車両に伝送中継器に対して前記第１の期間の完了を示す前記第２のコマンドを送信し、この第２のコマンドを送信した後、前記第２のモードに設定して第２のデータを送受信し、前記一端及び他端を除く車両の伝送中継器制御装置は、前記第１のコマンドを受信すると、前記第１のモードに設定するとともに、前記送信権を得ると第１のデータの送信し、この第１のデータの送信が終了すると、前記送信権を隣接する伝送中継器へ送信し、前記第２のコマンドを受信すると、前記第２のモードに設定して第２のデータを送受信する鉄道車両用伝送システムを特徴とする。 The present invention receives data transmitted from other vehicles mounted on each vehicle, and transmits a transmission repeater that transmits the received data; a trunk transmission line that connects between the transmission repeaters of each vehicle; a trunk line transmission receiver that performs trunk transmission transmitters and receivers of the data for transmitting the transmission relay and data of the other vehicles, the repeat transmission of the received data and replacing the transmission right between transmission repeaters adjacent to the buffer Connected to the transmission repeater control device for constructing a network by transmitting data stored in the buffer and data stored in the buffer , a transmission transceiver for transmitting and receiving data to and from the transmission repeater control device, and the transmission transceiver the transmission system for rail vehicles comprising a transmission station for exchanging data, the transmission relay control device for one end of the vehicle is repeated in a predetermined cycle, the transmission relay obtaining the transmission right A first period for executing a first mode in which one data is transmitted and another transmission repeater performs a repeated transmission of the received first data, and each vehicle is followed by the first period. Among the transmission control periods including the second period in which the second transmission repeater performs the second mode in which the second data is transmitted and received at an arbitrary timing, for instructing the start of the first period 1 is transmitted, the first command is transmitted, the first mode is set, and when the transmission of the first data is completed, the transmission right is transmitted to the adjacent transmission repeater, and the first When the second command indicating the end of the period is received, the second mode is set and the second data is transmitted / received, and the vehicle transmission relay control device at the other end receives the first command. And setting to the first mode When the transmission right is obtained, the first data is transmitted. When the transmission of the first data is finished, the second vehicle indicates completion of the first period to the transmission repeater to the one end vehicle. After transmitting the command and transmitting the second command, the transmission repeater control device for the vehicle excluding the one end and the other end is set to the second mode to transmit and receive the second data. When the first command is received, the first mode is set. When the transmission right is obtained, the first data is transmitted. When the transmission of the first data is completed, the transmission right is set to the adjacent transmission relay. When the second command is received, the railway vehicle transmission system sets the second mode and transmits / receives the second data when the second command is received .

本発明の鉄道車両用伝送システムによれば、引き通し線の増加や伝送チャンネルの追加を招くことなく、既存の１つの伝送路で伝送データの種類によって最適な伝送モードを適用することができ、列車の制御指令は伝送遅延時間を最短にする低遅延モードにて伝送し、サービス情報データは回線の帯域を最大限に活用する全二重モードに切り換えて伝送することができる。   According to the railway vehicle transmission system of the present invention, it is possible to apply an optimal transmission mode depending on the type of transmission data in one existing transmission line without causing an increase in the number of lead-through lines or addition of transmission channels. Train control commands are transmitted in a low delay mode that minimizes the transmission delay time, and service information data can be transmitted by switching to a full-duplex mode that maximizes the bandwidth of the line.

本発明の１つの実施の形態の鉄道車両用伝送システムの構成を示すブロック図。The block diagram which shows the structure of the transmission system for railway vehicles of one embodiment of this invention. 上記実施の形態の鉄道車両用伝送システムにおける伝送中継器の構成を示すブロック図。The block diagram which shows the structure of the transmission repeater in the transmission system for rail vehicles of the said embodiment. 上記伝送中継器内の伝送中継器制御装置の構成を示すブロック図。The block diagram which shows the structure of the transmission repeater control apparatus in the said transmission repeater. 上記実施の形態の鉄道車両用伝送システムによる低遅延モードと全二重モードとの切換タイミングを示すタイミングチャート。The timing chart which shows the switching timing of the low delay mode and full-duplex mode by the transmission system for railway vehicles of the said embodiment. 上記実施の形態の鉄道車両用伝送システムによる低遅延モード時の動作説明図その１。Operation | movement explanatory drawing 1 at the time of the low delay mode by the transmission system for railway vehicles of the said embodiment. 上記実施の形態の鉄道車両用伝送システムによる低遅延モード時の動作説明図その２。Operation | movement explanatory drawing 2 at the time of the low delay mode by the transmission system for railway vehicles of the said embodiment. 上記実施の形態の鉄道車両用伝送システムによる全二重モード動作時の動作説明図その１。Operation | movement explanatory drawing 1 at the time of the full duplex mode operation | movement by the transmission system for rail vehicles of the said embodiment. 上記実施の形態の鉄道車両用伝送システムによる全二重モード動作時の動作説明図その２。Operation explanatory drawing 2 at the time of the full-duplex mode operation | movement by the transmission system for rail vehicles of the said embodiment. 上記実施の形態の鉄道車両用伝送システムによる全二重モード動作時の動作説明図その３。Operation explanatory drawing 3 at the time of full-duplex mode operation | movement by the transmission system for rail vehicles of the said embodiment.

以下、本発明の実施の形態を図に基づいて詳説する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１に示すように、本発明の１つの実施の形態の鉄道車両用伝送システムは、鉄道車両の各車両１号車〜ｎ号車それぞれに伝送中継器１ａ，１ｂ，…，１ｎそれぞれが設置してあり、ツイストペアケーブル２本の全二重の幹線伝送路３ａ，３ｂ，…，３（ｎ−１）により隣接する伝送中継器間それぞれをバス状に接続している。尚、本実施の形態では、バス状伝送路で説明するが、冗長性を向上させるための梯子状伝送路やリング状伝送路にも適用可能である。   As shown in FIG. 1, the transmission system for a railway vehicle according to one embodiment of the present invention has transmission repeaters 1a, 1b,..., 1n installed in each of the cars No. 1 to No. n of the railway car. Yes, two full-duplex trunk transmission lines 3a, 3b,..., 3 (n-1) of two twisted pair cables connect the adjacent transmission repeaters in a bus shape. In this embodiment, a bus-like transmission line is described, but the present invention can also be applied to a ladder-like transmission line or a ring-like transmission line for improving redundancy.

図２に示すように、本実施の形態の鉄道車両用伝送システムにおける伝送中継器１ａ〜１ｎ各々（以下、代表する場合には「伝送中継器１」とする）は、２ポートの幹線伝送受信器４ａ，４ｂ、２ポートの幹線伝送送信器５ａ，５ｂと１ポート以上（自号車がデータ授受しない場合は０ポート以上）の伝送送受信器６ａ，６ｂと、各伝送ポートのデータのリピート(低遅延モード)又はストア・アンド・フォワード（全二重モード）の制御と伝送中継器間の送信権専用パケット（トークンパケット）の伝送を制御する伝送中継器制御装置２、自号車のデータ送信、受信を行う複数の伝送局７とを備えている。尚、自号車の伝送局７は伝送中継器１の内にあっても、伝送中継器１の外にあってもよい。伝送中継器１外に伝送局７がある場合は、伝送送受信器６のみが伝送中継器１内に実装される。図２では、伝送局７ａが伝送中継器１内に、伝送局７ｂが伝送中継器１外に実装されている例を示している。さらに、このような伝送局及びそれに付随する伝送送受信器は複数あってもよい。   As shown in FIG. 2, each of the transmission repeaters 1a to 1n (hereinafter referred to as “transmission repeater 1” in the representative case) in the railway vehicle transmission system of the present embodiment is a 2-port trunk transmission reception. 4a, 4b, 2 port trunk line transmission transmitters 5a, 5b and 1 port or more transmission transceivers 6a, 6b (or 0 port or more when the own car does not exchange data), and data repeat of each transmission port (low (Delay mode) or store-and-forward (full-duplex mode) control and transmission repeater control device 2 that controls the transmission of transmission right exclusive packets (token packets) between transmission repeaters, data transmission and reception of own car And a plurality of transmission stations 7. The transmission station 7 of the own car may be inside the transmission repeater 1 or outside the transmission repeater 1. When the transmission station 7 is outside the transmission repeater 1, only the transmission transceiver 6 is mounted in the transmission repeater 1. FIG. 2 shows an example in which the transmission station 7 a is mounted in the transmission repeater 1 and the transmission station 7 b is mounted outside the transmission repeater 1. Furthermore, there may be a plurality of such transmission stations and associated transmission transceivers.

伝送中継器制御装置２内には全二重モード動作時に受信データを格納するためのバッファ回路８が設けてある。この伝送中継制御装置２はコンピュータであり、組み込まれている伝送制御プログラムに基づき後述する伝送制御動作を行う。   In the transmission repeater controller 2, a buffer circuit 8 is provided for storing received data during full-duplex mode operation. The transmission relay control device 2 is a computer and performs a transmission control operation to be described later based on a built-in transmission control program.

この伝送中継器制御装置２は図３に示す機能構成であり、低遅延データとサービス情報データとを切り換えて受信する受信データ切換回路２１ａ，２１ｂ，２１ｃと、低遅延データとサービス情報データとを切り換えて送信する送信データ切換回路２２ａ，２２ｂ，２２ｃと、低遅延モードにてデータリピートとトークン制御をする低遅延制御回路２３と、バッファ８を備えた全二重モード動作制御回路２４と、低遅延モードと全二重モードとのモード切換を制御するモード切換制御回路２５を備えている。   The transmission repeater control device 2 has the functional configuration shown in FIG. 3, and includes received data switching circuits 21a, 21b, and 21c for switching and receiving low delay data and service information data, and low delay data and service information data. Transmission data switching circuits 22a, 22b and 22c for switching and transmission, a low delay control circuit 23 for data repeat and token control in the low delay mode, a full-duplex mode operation control circuit 24 having a buffer 8, A mode switching control circuit 25 that controls mode switching between the delay mode and the full-duplex mode is provided.

このモード切換制御回路２５は、受信データの宛先アドレスから列車の制御指令とサービス情報データとを判別し、列車の制御指令であると判別した場合には、受信データをリピート送信することによって全伝送中継器に接続されている伝送局に対して列車の制御指令を低遅延モードにて伝達し、サービス情報データであると判別した場合には受信データをバッファリングし、宛先アドレスの伝送局に対してサービス情報データを送信する全二重モードで送信させるモード切換制御をする。   This mode switching control circuit 25 discriminates the train control command and service information data from the destination address of the received data, and if it is determined that it is a train control command, all the transmissions are performed by repeatedly transmitting the received data. The train control command is transmitted to the transmission station connected to the repeater in the low-delay mode, and if it is determined as service information data, the received data is buffered and Mode switching control for transmitting in the full duplex mode for transmitting service information data.

尚、受信データ切換回路２１、送信データ切換回路２２は、伝送局とのデータ送受信を行う伝送送受信器６の台数に応じて増減することになる。   Note that the reception data switching circuit 21 and the transmission data switching circuit 22 increase or decrease in accordance with the number of transmission / reception transmitters / receivers 6 that perform data transmission / reception with the transmission station.

次に、上記の構成の鉄道車両用伝送システムによる伝送動作について説明する。図４は、時間軸上で低遅延モードと全二重モードとの動作期間を示している。例えば、ｔｃｙｃ＝１０ｍｓを１サイクルとして、一定期間ｔＲＥＰの低遅延モードと残りの期間ｔＳＷ（＝ｔｃｙｃ−ｔＲＥＰ）の全二重モードとを繰り返す。また、全二重モードの終わり近くにはｔｌｉｍ（例えば、９．５ｍｓ）が設定してあり、このｔｌｉｍを超えて新しいサービス情報データの送信を開始しない。   Next, the transmission operation by the railway vehicle transmission system having the above configuration will be described. FIG. 4 shows operation periods of the low delay mode and the full duplex mode on the time axis. For example, tcyc = 10 ms is set as one cycle, and the low-delay mode for a certain period tREP and the full-duplex mode for the remaining period tSW (= tcyc−tREP) are repeated. Also, tlim (for example, 9.5 ms) is set near the end of the full-duplex mode, and transmission of new service information data is not started beyond this tlim.

図５〜図９を用いて、低遅延モードと全二重モードの動作を説明する。ここでは、説明の簡明化のために５両編成の列車を想定してｎ＝ｅまでとし、中継器１ａ〜１ｅそれぞれを車両ａ〜ｅ号車それぞれに設置している。   The operation in the low delay mode and the full duplex mode will be described with reference to FIGS. Here, for simplification of explanation, a train of 5 cars is assumed to be up to n = e, and each of the repeaters 1a to 1e is installed in each of the vehicles a to e.

１）リセット(低遅延モードへの移行)
最初に、本実施の形態では伝送中継器１ａ側をネットワークの上流側、１ｅ側をネットワークの下流側と規定する。尚、上流側、下流側の定義は逆であってもかまわない。また、ネットワークが有効である範囲内で上流側の端の伝送中継器１が最上流として伝送の親局動作をする。ここで、ある伝送中継器１において上流側にデータ伝送してもその応答がない場合には自局が親局であると判断する。またある伝送中継器１において上流側、下流側それぞれにデータを伝送した場合に上流側、下流側それぞれから応答がある場合に中間局であると判断する。そしてある伝送中継器１が下流側にデータを伝送してもその応答がない場合には自局が最下流局であると判断する。 1) Reset (transition to low delay mode)
First, in this embodiment, the transmission repeater 1a side is defined as the upstream side of the network, and the 1e side is defined as the downstream side of the network. The definitions of the upstream side and the downstream side may be reversed. Further, within the range where the network is effective, the transmission repeater 1 at the upstream end performs the master station operation of transmission as the most upstream. Here, if there is no response even if data transmission is performed upstream in a certain transmission repeater 1, it is determined that the own station is the master station. Further, when data is transmitted to each of the upstream side and the downstream side in a certain transmission repeater 1, it is determined as an intermediate station when there is a response from each of the upstream side and the downstream side. If there is no response even if a certain transmission repeater 1 transmits data downstream, it is determined that the own station is the most downstream station.

図５（ａ）に示すように、最上流の親局として動作する伝送中継器１ａは、低遅延モード開始の合図（送信権巡回の合図）としてリセットコマンドを発行する。リセットコマンドを受信した各伝送中継器１ｂ〜１ｅは、下流側にリセットコマンドをリピート送信すると共に、動作モードを低遅延モードとしデータ受信準備に入る。各伝送中継器１ａ〜１ｅはリセットコマンド送信時（又は受信時であってもよい）に内部タイマをクリアして計時を再開する。   As shown in FIG. 5A, the transmission repeater 1a operating as the most upstream master station issues a reset command as a signal for starting the low-delay mode (a signal for transmitting the transmission right). Each of the transmission repeaters 1b to 1e that has received the reset command repeats transmission of the reset command to the downstream side, sets the operation mode to the low delay mode, and enters data reception preparation. Each of the transmission repeaters 1a to 1e clears the internal timer when the reset command is transmitted (or may be received) and restarts timing.

２）伝送中継器１ａのデータ送信
図５（ｂ）に示すように、伝送中継器１ａは列車の制御指令データ(データａ)を送信する。伝送中継器１ｂ〜１ｄそれぞれは、伝送中継器１ａからの受信データａを下流側にリピート送信する。ここで、リピート送信とは、一度データを全て受信完了してから送信するのではなく、受信動作を行いながら受信データを送信する動作である。このリピート送信によれば、伝送中継器１ａが送信したデータａが最下流側の伝送中継器１ｅに届くまでの伝送遅延が短い。これを低遅延モードと称している。 2) Data transmission of transmission repeater 1a As shown in FIG. 5B, the transmission repeater 1a transmits train control command data (data a). Each of the transmission repeaters 1b to 1d repeatedly transmits the reception data a from the transmission repeater 1a to the downstream side. Here, the repeat transmission is an operation of transmitting received data while performing a reception operation, instead of transmitting after all the data has been received once. According to this repeat transmission, the transmission delay until the data a transmitted by the transmission repeater 1a reaches the most downstream transmission repeater 1e is short. This is called a low delay mode.

３）送信権を伝送中継器１ａから伝送中継器１ｂへ移動
図５（ｃ）に示すように、伝送中継器１ａは、必要なデータ送信後に送信権を移動するためのトークンコマンドを発行する。伝送中継器１ｂは、伝送中継器１ａからのトークンを受信し、送信権を確保する。伝送中継器１ｂは、トークンコマンドはリピート送信しない。 3) Move the transmission right from the transmission repeater 1a to the transmission repeater 1b As shown in FIG. 5C, the transmission repeater 1a issues a token command for moving the transmission right after necessary data transmission. The transmission repeater 1b receives the token from the transmission repeater 1a and secures the transmission right. The transmission repeater 1b does not repeat the token command.

４）伝送中継器１ｂのデータ送信
図５（ｄ）に示すように、送信権を確保した伝送中継器１ｂは、列車の制御指令データ(データｂ)を上流側と下流側に送信する。伝送中継器１ａは伝送中継器１ｂからのデータｂを受信する。また、伝送中継器１ｃ，１ｄは、伝送中継器１ｂからの受信データｂを下流側にリピート送信する。伝送中継器１ｅは上流側の伝送中継器１ｄからデータｂを受信する。このようにして、ほぼ同時に全伝送中継器がデータｂを受信することができる。 4) Data transmission of transmission repeater 1b As shown in FIG. 5 (d), the transmission repeater 1b that secures the transmission right transmits train control command data (data b) to the upstream side and the downstream side. The transmission repeater 1a receives the data b from the transmission repeater 1b. Further, the transmission repeaters 1c and 1d repeatedly transmit the reception data b from the transmission repeater 1b to the downstream side. The transmission repeater 1e receives data b from the upstream transmission repeater 1d. In this way, all transmission repeaters can receive data b almost simultaneously.

５）送信権を伝送中継器１ｂから伝送中継器１ｃへ移動
図６（ａ）に示すように、伝送中継器１ｂは、必要なデータ送信後送信権を移動するためのトークンコマンドを発行する。伝送中継器１ｃは、伝送中継器１ｂからのトークンを受信し、送信権を確保する。 5) Move the transmission right from the transmission repeater 1b to the transmission repeater 1c As shown in FIG. 6A, the transmission repeater 1b issues a token command for moving the transmission right after necessary data transmission. The transmission repeater 1c receives the token from the transmission repeater 1b and secures the transmission right.

６）伝送中継器１ｃのデータ送信
図６（ｂ）に示すように、送信権を確保した伝送中継器１ｃは、列車の制御指令データ(データｃ)を上流側と下流側に送信する。伝送中継器１ｂは下流側の伝送中継器１ｃからの受信データｃを上流側にリピート送信する。また、伝送中継器１ｄは、上流側の伝送中継器１ｃからの受信データｃを下流側にリピート送信する。このようにして、ほぼ同時に全伝送中継器１ａ，１ｂ，１ｄ，１ｅがデータｃを受信することができる。 6) Data transmission of transmission repeater 1c As shown in FIG. 6 (b), the transmission repeater 1c that secures the transmission right transmits train control command data (data c) to the upstream side and the downstream side. The transmission repeater 1b repeats the reception data c from the downstream transmission repeater 1c to the upstream side. Also, the transmission repeater 1d repeats the reception data c from the upstream transmission repeater 1c to the downstream side. In this way, almost all transmission repeaters 1a, 1b, 1d, and 1e can receive data c almost simultaneously.

同様に、送信権を伝送中継器１ｃから伝送中継器１ｄへ移動し、伝送中継器１ｄのデータｄを上流側、下流側に送信し、その後、送信権を伝送中継器１ｄから最下流側の伝送中継器１ｅへ移動する動作を繰り返す。こうして、最終的に最下流の伝送中継器１ｅまで送信権を移動する。   Similarly, the transmission right is moved from the transmission repeater 1c to the transmission repeater 1d, the data d of the transmission repeater 1d is transmitted to the upstream side and the downstream side, and then the transmission right is transferred from the transmission repeater 1d to the most downstream side. The operation of moving to the transmission repeater 1e is repeated. Thus, the transmission right is finally moved to the most downstream transmission repeater 1e.

７）伝送中継器１ｅデータ送信
図６（ｃ）に示すように、送信権を確保した最下流の伝送中継器１ｅは、列車の制御指令データ(データｅ)を上流側に送信する。伝送中継器１ｂ〜１ｄ各々はそれぞれの下流側の伝送中継器１ｃ〜１ｅからの受信データｅを上流側にリピート送信する。このようにして、ほぼ同時に全伝送中継器１ａ〜１ｄがデータｅを受信することができる。 7) Data transmission of transmission repeater 1e As shown in FIG. 6 (c), the most downstream transmission relay 1e that secures the transmission right transmits train control command data (data e) to the upstream side. Each of the transmission repeaters 1b to 1d repeatedly transmits the reception data e from the respective downstream transmission repeaters 1c to 1e to the upstream side. In this way, all transmission repeaters 1a to 1d can receive data e almost simultaneously.

８）リターン(低遅延モード期間終了)
図６（ｄ）に示すように、伝送中継器１ｅは制御指令データ（データｅ）を送信完了すると、最下流の伝送中継器である（下流側に伝送中継器がない）ため、低遅延モードが完了したことを示すリターンコマンドを上流側に送信する。伝送中継器１ｂ〜１ｄは、受信したリターンコマンドを上流側にリピート送信し、最上流の伝送中継器１ａにまでリターンコマンドが送られる。 8) Return (low delay mode period end)
As shown in FIG. 6D, the transmission repeater 1e is the most downstream transmission repeater (there is no transmission repeater on the downstream side) when transmission of the control command data (data e) is completed. A return command indicating that is completed is sent to the upstream side. The transmission repeaters 1b to 1d repeatedly transmit the received return command to the upstream side, and the return command is sent to the most upstream transmission repeater 1a.

次に全二重モードでの動作について、図７〜図９を用いて説明する。   Next, the operation in the full-duplex mode will be described with reference to FIGS.

１）低遅延モードから全二重モードへモード切換
図７（ａ）に示すように、伝送中継器１ｅは、制御指令データを送信完了すると、低遅延モードが完了したことを示すリターンコマンドを上流側に送信する。これは図６（ｄ）と同じ状態である。 1) Mode switching from low-delay mode to full-duplex mode As shown in FIG. 7A, when the transmission repeater 1e completes transmission of the control command data, a return command indicating that the low-delay mode is completed is sent upstream. To the side. This is the same state as in FIG.

各伝送中継器１ａ〜１ｄはリターンコマンドを受信すると低遅延モードから全二重モードにモード切換を行い、全二重モードに移行する。最下流の伝送中継器１ｅもリターンコマンドを送信した後にモード切換を行い、全二重モードに移行する。こうして、最終的に全伝送中継器１ａ〜１ｅは、低遅延モードを終了し、全二重モードへ移行する。   When each of the transmission repeaters 1a to 1d receives the return command, it switches the mode from the low delay mode to the full duplex mode, and shifts to the full duplex mode. The most downstream transmission repeater 1e also performs mode switching after transmitting a return command, and shifts to the full duplex mode. Thus, finally, all transmission repeaters 1a to 1e end the low delay mode and shift to the full duplex mode.

２）全二重モード時のパケットの流れと伝送中継器内のバッファ状態（１）
図７（ｂ）に示すように、伝送中継器１ａ〜１ｅは、全二重モードに移行すると伝送中継器制御装置２に内蔵されているバッファ８を使用し、送信と受信を独立して同時に実施する全二重モードの動作を行う。 2) Packet flow in full-duplex mode and buffer status in the transmission repeater (1)
As shown in FIG. 7B, the transmission repeaters 1a to 1e use the buffer 8 built in the transmission repeater control device 2 when shifting to the full-duplex mode, so that transmission and reception can be performed independently and simultaneously. Perform full-duplex mode operation.

尚、図７〜図９では、各伝送中継器１ａ〜１ｅのバッファ８を上段は上流側の伝送中継器と自局の伝送局７へ送信するデータと下流側の伝送中継器から受信したデータのためのバッファ、下段は下流側と自局の伝送局７へ送信するデータと上流側の伝送中継器から受信したデータのためのバッファを示している。例えば、伝送中継器１ａについては、図示上側のバッファには下流側の伝送中継器１ｂからのデータｂ’をバッファしている。同時に、図示下側のバッファには下流側の中継器１ｂと自局の伝送局７に送信するデータａ’をバッファしている。また、中間の伝送中継器１ｂについては、図示上側のバッファには下流側の伝送中継器１ｃから受信したデータｃ’と上流側の伝送中継器１ａ及び自局の伝送局７に送信するためのデータｂ’とをバッファしている。同時に、図示下側のバッファには上流側の伝送中継器１ａから受信したデータａ’と下流側の伝送中継器１ｃ及び自局の伝送局７に送信するデータｂ’をバッファしている。   7 to 9, the upper part of the buffer 8 of each transmission repeater 1a to 1e is the data transmitted to the upstream transmission repeater and the local transmission station 7, and the data received from the downstream transmission repeater. The lower row shows a buffer for data to be transmitted to the downstream side and the transmission station 7 of the own station and data received from the upstream transmission repeater. For example, for the transmission repeater 1a, data b 'from the downstream transmission repeater 1b is buffered in the upper buffer in the figure. At the same time, the lower buffer in the figure buffers data a 'to be transmitted to the downstream repeater 1b and the transmission station 7 of the own station. For the intermediate transmission repeater 1b, the upper buffer in the figure is used to transmit data c ′ received from the downstream transmission repeater 1c, the upstream transmission repeater 1a, and the transmission station 7 of the own station. Data b 'is buffered. At the same time, the lower buffer in the figure buffers data a 'received from the upstream transmission repeater 1a and data b' to be transmitted to the downstream transmission repeater 1c and the transmission station 7 of the own station.

３）全二重モード時のパケットの流れと伝送中継器内のバッファ状態（２）
図８（ａ）を用いて、伝送中継器１ａ，１ｃ，１ｅそれぞれに二重の四角で囲った新規データ、データａ”、データｃ”、データｅ”それぞれが発生した状態を説明する。 3) Packet flow in full duplex mode and buffer status in the transmission repeater (2)
A state in which new data, data a ″, data c ″, and data e ″ each surrounded by a double square is generated in each of the transmission repeaters 1a, 1c, and 1e will be described with reference to FIG.

伝送中継器１ａでは、新規データａ”が発生し下流側への送信バッファに格納され、回線が空き次第送信される。また、下流側から受信したデータｃ’をバッファ８に格納し、伝送局との回線が空き次第伝送局７に送信する。伝送中継器１ｂでは、データａ”を受信すると下流側への送信バッファに格納されると共に、先にバッファに格納されていたデータａ’を回線が空き次第、下流側と伝送局７に送信する。   In the transmission repeater 1a, new data a "is generated and stored in the transmission buffer to the downstream side, and transmitted as soon as the line is available. Also, the data c 'received from the downstream side is stored in the buffer 8, and the transmission station As soon as the line is free, the transmission repeater 1b receives the data a "and stores it in the transmission buffer to the downstream side, and also stores the data a 'previously stored in the buffer in the line. Transmits to the downstream side and the transmission station 7 as soon as available.

また、伝送中継器１ｂでは、上流側への送信バッファに格納されているデータｃ’を上流側と自局の伝送局７に送信すると共に下流側から受信したデータｄ’をバッファに格納する。伝送中継器１ｃでは、新規データｃ”を下流側への送信バッファと上流側への送信バッファに格納する。上流側から受信したデータａ’を下流側への送信バッファに格納すると共に先に格納されていたデータｂ’を下流側と自局の伝送局７に送信する。また、伝送中継器１ｃでは、上流側への送信バッファに格納されているデータｄ’を上流側と自局の伝送局７に送信すると共に下流側から受信したデータｅ’をバッファに格納する。同様に、伝送中継器１ｄ，１ｅでも図示したように受信データはバッファに格納され、先に格納されたバッファのデータが送信される。   Further, the transmission repeater 1b transmits the data c 'stored in the upstream transmission buffer to the upstream and local transmission stations 7, and stores the data d' received from the downstream side in the buffer. The transmission repeater 1c stores the new data c ″ in the downstream transmission buffer and the upstream transmission buffer. The data a ′ received from the upstream side is stored in the downstream transmission buffer and stored first. The transmitted data b ′ is transmitted to the downstream side and the transmission station 7 of the local station, and the transmission repeater 1c transmits the data d ′ stored in the upstream transmission buffer to the upstream side and the local station. The data e ′ received from the downstream side is transmitted to the station 7 and stored in the buffer.Similarly, the received data is also stored in the buffer as shown in the transmission repeaters 1d and 1e, and the buffer data previously stored is stored in the buffer. Is sent.

４）全二重モード時のパケットの流れと伝送中継器内のバッファ状態（３）
図８（ｂ）に示すように、伝送中継器１ｂに二重の四角で囲った新規データｂ”が発生したときにはその新規データｂ”はバッファ８にいったん格納され、バッファ８に先に格納されていたデータから順に送信される。 4) Packet flow in full duplex mode and buffer status in transmission repeater (3)
As shown in FIG. 8B, when new data b ″ surrounded by a double square is generated in the transmission repeater 1b, the new data b ″ is once stored in the buffer 8 and stored in the buffer 8 first. It is transmitted in order from the data that was stored.

５）リミット時間経過後（全二重モード終了）
図９に示すように、いま、伝送中継器１ａ〜１ｅは低遅延モード開始（リセットコマンド受信：ｔ＝０）からの時間ｔｌｉｍ（例では９．５ｍｓ）が経過したとする。低遅延モードは１サイクル周期ｔｃｙｃ（例では、１０ｍｓ）毎に起動するため、次回の低遅延モードが起動されるまでの残り時間はｔｃｙｃ−ｔｌｉｍ（例では０．５ｍｓ）となる。各伝送中継器１ａ〜１ｅは、リミット時間（ｔｌｉｍ）を経過すると新規の送信を中止し、次回の低遅延モードの起動に備える。そして受信済みのデータは、次回の全二重モードまで各伝送中継器内のバッファ８に保管される。尚、リミット時間ｔｌｉｍは現在送信中のデータがｔｃｙｃまでに送信完了できる時間をパケット長と伝送速度から決定し、設定する。 5) After the limit time has elapsed (full-duplex mode ends)
As shown in FIG. 9, it is assumed that a time tlim (9.5 ms in the example) has elapsed from the start of the low delay mode (reset command reception: t = 0) in the transmission repeaters 1a to 1e. Since the low delay mode is activated every cycle period tcyc (10 ms in the example), the remaining time until the next low delay mode is activated is tcyc-tlim (0.5 ms in the example). Each transmission repeater 1a to 1e stops new transmission when the limit time (tlim) elapses, and prepares for the next activation of the low delay mode. The received data is stored in the buffer 8 in each transmission repeater until the next full-duplex mode. The limit time tlim is set by determining the time during which transmission of currently transmitted data can be completed by tcyc from the packet length and the transmission speed.

このようにして、本実施の形態の鉄道車両用伝送システムによれば、１つの伝送路で列車の制御指令の伝送には伝送遅延時間が最短になる低遅延モードを使用し、サービス情報データの伝送には伝送回線の帯域を有効に活用する全二重モードを使用することができ、既存のイーサネット（登録商標）を利用して、伝送遅延の短縮と伝送路帯域の増大を両立することができる。   Thus, according to the railway vehicle transmission system of the present embodiment, the low delay mode in which the transmission delay time is the shortest is used for transmission of the train control command on one transmission path, and the service information data For transmission, the full-duplex mode that effectively uses the bandwidth of the transmission line can be used, and the existing Ethernet (registered trademark) can be used to reduce the transmission delay and increase the transmission path bandwidth. it can.

１，１ａ〜１ｎ 伝送中継器
２ 伝送中継器制御装置
３ 伝送路
４ａ，４ｂ 幹線伝送受信器
５ａ，５ｂ 幹線伝送送信器
６ａ，６ｂ 伝送送受信器
７，７ａ，７ｂ 伝送局
８ バッファ
２１ａ，２１ｂ，２１ｃ 受信データ切換回路
２２ａ，２２ｂ，２２ｃ 送信データ切換回路
２３ 低遅延制御回路
２４ 全二重モード動作制御回路
２５ モード切換回路
ｔｃｙｃ モード切換周期
ｔＲＥＰ 低遅延モード期間
ｔＳＷ 全二重モード期間
ｔｌｉｍ 制限時間 1, 1a to 1n Transmission repeater 2 Transmission repeater controller 3 Transmission paths 4a, 4b Trunk transmission receivers 5a, 5b Trunk transmission transmitters 6a, 6b Transmission transceivers 7, 7a, 7b Transmission stations 8 Buffers 21a, 21b, 21c Reception data switching circuit 22a, 22b, 22c Transmission data switching circuit 23 Low delay control circuit 24 Full-duplex mode operation control circuit 25 Mode switching circuit tcyc Mode switching cycle tREP Low-delay mode period tSW Full-duplex mode period tlim Time limit

Claims (4)

各車両に搭載され他の車両から伝送されてきたデータを受信すると共に、受信したデータを送信する伝送中継器と、前記各車両の伝送中継器間を接続する幹線伝送路と、前記他の車両の伝送中継器とデータの送信を行う幹線伝送送信器及びデータの受信を行う幹線伝送受信器と、隣接する伝送中継器間に送信権の交換と受信データのリピート送信、バッファへのデータの記憶及びバッファに記憶されたデータの送信を行いネットワークを構築する伝送中継器制御装置と、前記伝送中継器制御装置とデータの送受信を行う伝送送受信器と、前記伝送送受信器に接続されデータの授受を行う伝送局とを備えた鉄道車両用伝送システムにおいて、
一端の車両の伝送中継器制御装置は、
所定の周期で繰り返され、送信権を得た伝送中継器が第１のデータの送信を行なうとともに他の伝送中継器は受信した第１のデータのリピート送信を行なう第１のモードを実行する第１の期間と、この第１の期間に後続し、前記各車両の伝送中継器が任意のタイミングで第２のデータの送受信を行なう第２のモードを実行する第２の期間とを含む送信制御期間のうち、前記第１の期間の開始を指示するための第１のコマンドを送信し、
前記第１のコマンドを送信した後、前記第１のモードに設定し、第１のデータの送信が終了すると送信権を隣接する伝送中継器へ送信し、
前記第１の期間の終了を示す第２のコマンドを受信すると、前記第２のモードに設定して第２のデータを送受信し、
他端の車両の伝送中継制御装置は、
前記第１のコマンドを受信すると、前記第１のモードに設定するとともに、前記送信権を得ると第１のデータの送信し、
この第１のデータの送信が終了すると、前記一端の車両に伝送中継器に対して前記第１の期間の完了を示す前記第２のコマンドを送信し、
この第２のコマンドを送信した後、前記第２のモードに設定して第２のデータを送受信し、
前記一端及び他端を除く車両の伝送中継器制御装置は、
前記第１のコマンドを受信すると、前記第１のモードに設定するとともに、前記送信権を得ると第１のデータの送信し、
この第１のデータの送信が終了すると、前記送信権を隣接する伝送中継器へ送信し、
前記第２のコマンドを受信すると、前記第２のモードに設定して第２のデータを送受信する
ことを特徴とする鉄道車両用伝送システム。 A transmission repeater that receives data transmitted from other vehicles mounted on each vehicle and transmits the received data, a main transmission line that connects between the transmission repeaters of each vehicle, and the other vehicle Exchange transmission between the main transmission transmitter and the main transmission transmission receiver for receiving data, and the transmission transmission exchange between the adjacent transmission repeaters and the repeat transmission of the received data, storage of the data in the buffer And a transmission repeater control device that constructs a network by transmitting data stored in the buffer , a transmission transmitter / receiver that transmits / receives data to / from the transmission repeater control device, and a transmission / reception device connected to the transmission transceiver. In a railway vehicle transmission system with a transmission station to perform,
The transmission repeater control device for the vehicle at one end is
A transmission repeater which is repeated at a predetermined cycle and obtains the transmission right transmits the first data, and the other transmission repeater executes the first mode in which the received first data is repeatedly transmitted. Transmission control including a period of 1 and a second period in which the transmission repeater of each vehicle executes a second mode in which the second data is transmitted and received at an arbitrary timing following the first period. Transmitting a first command for instructing the start of the first period of the period;
After transmitting the first command, set to the first mode, and when transmission of the first data is completed, transmit the transmission right to the adjacent transmission repeater,
When the second command indicating the end of the first period is received, the second mode is set and the second data is transmitted / received,
The vehicle transmission relay control device at the other end is
When the first command is received, the first mode is set, and when the transmission right is obtained, the first data is transmitted,
When the transmission of the first data is completed, the second command indicating completion of the first period is transmitted to the transmission repeater to the vehicle at the one end,
After sending this second command, set the second mode to send and receive second data,
The vehicle transmission repeater control device, excluding the one end and the other end,
When the first command is received, the first mode is set, and when the transmission right is obtained, the first data is transmitted,
When the transmission of the first data is completed, the transmission right is transmitted to the adjacent transmission repeater,
The railway vehicle transmission system , wherein when receiving the second command, the second mode is transmitted and received by setting the second mode . 前記各車両の伝送中継器制御装置は、前記第２のモードから前記第１のモードに移行すると、前記第１のモードの開始からの経過時間を計測し、予め定められた時間が経過した場合は、前記第２のデータの送信を中止して前記第１のコマンドの受信があるまで待機することを特徴とする請求項１に記載の鉄道車両用伝送システム。 Before SL Den transmission repeater controller of each vehicle, the transition from the second mode to the first mode, the measures an elapsed time from the start of the first mode, a predetermined time 2. The railway vehicle transmission system according to claim 1 , wherein when the time elapses, the transmission of the second data is stopped and the process waits until the first command is received . 前記各車両の伝送中継器制御装置は、前記予め定められた時間が経過することで前記第２のデータの送信を中止したときに、前記バッファに記憶された第２のデータがあるときは、次の所定の周期における第２のモードが設定されるまで保持することを特徴とする請求項２に記載の鉄道車両用伝送システム。 When there is second data stored in the buffer when the transmission repeater control device of each vehicle stops transmission of the second data after the predetermined time has elapsed, The railway vehicle transmission system according to claim 2, wherein the second mode in the next predetermined cycle is maintained until the second mode is set . 前記第１のデータは制御指令であり、前記第２のデータはサービス情報であることを特徴とする請求項１に記載の鉄道車両用伝送システム。 The railway vehicle transmission system according to claim 1, wherein the first data is a control command, and the second data is service information .
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