JP4331247B2 - Railway vehicle transmission equipment - Google Patents

Description

  The present invention relates to a railway vehicle transmission apparatus.

  A typical CSMA / CD (Carrier Sense Multiple Access with Collision Detection) network is Ethernet (registered trademark) defined by the IEEE 802.3 standard, that is, 10Base-T / 100Base-TX / 1000Base- using a twisted pair cable. There are 10Base-F / 100Base-FX / 1000Base-LX / 1000Base-SX and the like using T or an optical cable. When these CSMA / CD type networks are to be applied to a railway vehicle, as shown in FIG. On the other hand, repeaters specified in the IEEE 802.3 standard are limited to 4 stages at 10 Mbps and up to 2 stages at 100 Mbps, so only 10 cars can handle up to 4 cars. The widely used Ethernet (registered trademark) could not be applied to the vehicle.

  In addition, since the CSMA / CD network is basically a transmission system that allows data collision and retransmits data when a collision occurs, it is difficult to apply to a system that does not allow transmission delay such as vehicle control information. It was necessary to adopt an expensive token ring network or the like.

  As described above, when Ethernet (registered trademark), which is the network of the IEEE 802.3 standard that has been most widely used in recent years, is to be used for a railway vehicle transmission device, it cannot be applied to a long train. There was a problem that the reliability of the system could not be guaranteed.

  Accordingly, an object of the present invention is to provide a railway vehicle transmission apparatus that can be applied to a long-organized vehicle and can improve reliability.

The above-mentioned problem is mainly achieved by receiving each of the transmission relays mounted on each vehicle and transmitted from other vehicles, and repeating transmission and the main transmission line connecting the transmission relays of each vehicle. System and slave duplex are provided with an intersystem transmission path connecting the transmission repeaters installed in the same vehicle, and a ladder-shaped transmission path is formed by the trunk transmission path and the intersystem transmission path. A transmission device for a railway vehicle, wherein the transmission repeater of each vehicle is between a transmission transmission transmitter / receiver that transmits / receives data to / from the transmission repeater of the other vehicle and another transmission repeater in the same vehicle. An intersystem transmission transceiver for transmitting and receiving data, a transmission relay controller for controlling the trunk transmission transceiver and the intersystem transmission transceiver, and a network for constructing a network, and for transmitting and receiving data to and from the transmission relay controller Transmission transceiver to perform and said transmission transceiver And a transmission station which transmits and receives the connected data, each transmission relay is to repeat transmitting the data to the opposite main line transmission path and the inter-system transmission path and the reception port to receive data from the trunk transmission transceiver, When all transmission apparatuses receive the same data and each transmission repeater receives the same type of data from the main transmission line and the inter-system transmission line, the first transmission data is preferentially transmitted repeatedly. Can be achieved.

According to the present invention, a CSMA / CD network system is adopted, and a transmission path connecting between transmission repeaters (in the same vehicle) connected in a master-slave pair is added to form a ladder-type transmission path configuration. By using the vertical line (inter-system transmission line) of the ladder-like transmission line, it can be applied to a long knitted vehicle, improving the reliability and avoiding the collision. it is possible to provide a transmission system for a railway vehicle you repeat the data delay.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 shows the configuration of a transmission line in a railway vehicle transmission apparatus according to one embodiment of the present invention, and FIG. 2 shows the configuration of a transmission repeater. In the railway vehicle transmission apparatus according to the present embodiment, each of the plurality of transmission repeaters 1a to 1n has three or more transmission transceiver ports 4a, 4b, and 4c (two or more ports when the own car does not exchange data), Transmission repeater control device 2 for controlling data repeat of each transmission port and controlling dedicated packets between transmission repeaters, a plurality of transmission stations 5 for transmitting / receiving data of the own car, and a plurality of transmission repeaters The transmission lines 3a to 3 (n-1) are connected in a bus shape between 1a to 1n.

  The transmission station 5 of the own car may be inside the transmission repeater 1 or outside the transmission repeater 1. In the case of a transmission station outside the transmission repeater 1, only the transmission transceiver ports 4a, 4b, 4c are mounted in the transmission repeater 1. FIG. 2 shows an example in which the transmission station 5 a is mounted in the transmission repeater 1 and the transmission station 5 b is mounted outside the transmission repeater 1. There may be a plurality of ports of the transmission station 5 and the transmission transceiver 4 associated therewith.

  The transmission lines 3a to 3 (n-1) may be twisted pair wires (10Base-T / 100Base-T or the like) or optical fiber cables (10Base-F / 100Base-FX or the like).

  In the present embodiment, the transmission lines 3a to 3 (n-1) are described as a bus, but the control shown in the specification of Japanese Patent Application Laid-Open No. 2004-96159 (Japanese Patent Application Laid-Open No. 2004-96159) is added. Therefore, it is possible to increase the redundancy by making a loop connection.

  Next, the operation of the railway vehicle transmission device of the present embodiment having the above-described configuration will be described. 3 to 5 show the flow of a dedicated packet between the transmission repeaters 1a to 1e. 6 to 7 show transmission control to each transmission station 5 in the transmission repeater 1. FIG.

  Here, it is assumed that the number of cars from 1st car to 5th car is a five-car train up to n = e. A transmission repeater 1a is installed in the first car, and is connected to a transmission repeater 1b of the second car through a transmission path 3a. From the second car to the fifth car, transmission repeaters 1b to 1e are installed one by one, and are connected in a bus shape by transmission paths 3b to 3d.

  First, each transmission repeater 1a to 1e determines the network configuration from the link pulse (specified in IEEE 802.3). In the present embodiment, the transmission repeaters 1a to 1e are in a network connected in a bus shape. Here, the transmission repeater 1a side is defined as the upstream side of the network, and the e side is defined as the downstream side of the network. The definition of upstream / downstream may be reversed. Also, the transmission repeater 1a at the upstream end is the most upstream station and operates as a master station for transmission. The transmission repeater 1e at the downstream end is defined as the most downstream station, and the intermediate 1b to 1d are defined as the intermediate stations.

  Hereinafter, the network operation in this configuration will be described with reference to FIGS.

(1) Initialization As a cue to start transmission control from now on, the transmission repeater 1a which is the most upstream station sends a reset packet downstream through the transmission line 3a. When the other transmission repeaters 1b to 1e receive the reset packet, the other transmission repeaters 1b to 1e determine that their own station has no transmission right and suppress transmission. In addition, a reset packet is transmitted to the downstream side.

  When the reset packet reaches the transmission relay 1e which is the most downstream station, the transmission relay having the transmission right is only the transmission relay 1a of the most upstream station.

(2) Data transmission (1a)
The transmission repeater 1a of the most upstream station having the transmission right transmits the data 1 from the transmission station 5 in the own apparatus. The transmission repeaters 1b to 1e having no transmission right repeat transmission of the data 1 to the downstream side and also to the transmission station 5 in the own transmission repeater. All transmission stations 5 receive data 1 almost simultaneously.

(3) Transmission right transfer (1a → 1b)
When transmission of data 1 is completed, the transmission repeater 1a transmits a token packet to the downstream side in order to pass the transmission right to the downstream side. At this time, the transmission repeater 1a shifts to a state where there is no transmission right. When the transmission repeater 1b receives the token packet, the transmission repeater 1b does not repeat transmission to the downstream side, and the transmission repeater 1b obtains the transmission right.

(4) Data transmission (1b)
The transmission repeater 1b that has obtained the transmission right transmits the data 2 from the transmission station 5 in its own apparatus. The transmission repeaters 1a, 1c to 1e having no transmission right repeatedly transmit the data 2 and also to the transmission station 5 in each device.

(5) Transmission right transfer (1d → 1e)
Heading downstream, repeat transmission right transfer and data transmission. Here, the token packet is transmitted from the transmission repeater 1d to the most downstream transmission repeater 1e, and the transmission repeater 1e obtains the transmission right.

(6) Data transmission (1e)
The most downstream transmission repeater 1e that has obtained the transmission right transmits the data 3 from the transmission station 5 in its own apparatus.

(7) Return When the data transmission is completed, since the transmission repeater 1e is the most downstream station, it transmits a return packet toward the upstream side to indicate that the transmission right has completed, and shifts to a state without the transmission right. . The transmission repeaters 1b to 1d, which are intermediate stations, sequentially repeat the return packet upstream. When receiving the return packet, the most upstream transmission repeater 1a determines that the transmission right is completed and starts transmission right control again from step (1).

  If the transmission repeater 1a, which is the most upstream station, does not receive a return packet within a predetermined time, it is determined that a failure has occurred in the network, and transmission is resumed from the initialization step (1). Prevents the patrol from stopping.

  Further, each transmission repeater 1a to 1e is provided with a cyclic time monitoring timer, and there is a lot of transmission data from each transmission station 5 in the own transmission repeater, and it is determined that the transmission right cannot be completed in time. In this case, the transmission right given to the transmission station 5 is suppressed in accordance with the priority order given in advance, so that the time required for the transmission right to complete is kept. This makes it possible to keep the traveling time constant even for data that requires real-time properties, such as vehicle control information.

  Next, transmission suppression of each transmission station 5 in the own transmission repeater will be described with reference to FIGS.

(1) When the transmission suppression own transmission repeater 1 does not have the transmission right, the transmission repeater control device 2 sends a PAUSE_A packet (in IEEE 802.3x) to the transmission stations 5a to 5d in the own transmission repeater in order to suppress transmission. Regulation: A indicates the time to suppress transmission). The transmission period is shorter than the PAUSE time [A].

(2) Transmission permission for the transmission station 5a When the transmission relay 1 has a transmission right and permits transmission to the transmission station 5a, the transmission relay controller 2 permits transmission to the transmission station 5a. A PAUSE_B packet (transmission permitted when time B = 0 is specified) is transmitted. The transmission station 5a that has received the PAUSE_B packet enters a transmission-permitted state. Since the other transmission stations 5b to 5d do not receive the PAUSE_B packet, the transmission of the PAUSE_A packet in the step (1) remains in a prohibited state.

(3) Transmission station 5a transmits data The transmission station 5a permitted to transmit transmits data 1. The transmission repeater control device 2 repeatedly transmits the data 1 from the transmission station 5a to the other transmission stations 5b to 5d and the upstream transmission repeater / downstream transmission repeater. Even if the transmission station 5a is permitted to transmit, it is not transmitted if there is no data to be transmitted. In this case, the process proceeds to the next step (4) after a certain time.

(4) Prohibit transmission of transmission station 5a Upon receiving the data packet set by the transmission station 5a, the transmission repeater control device 2 transmits a PAUSE_A packet for which transmission is prohibited to the transmission station 5a. At this moment, the transmission stations 5a to 5d are in a transmission prohibited state.

(5) Transmission permission to transmission station 5b Next, the transmission repeater control apparatus 2 transmits a PAUSE_B packet that permits transmission to the transmission station 5b. The transmission station 5b that has received the PAUSE_B packet is in a transmission-permitted state.

  The transmission repeater control apparatus 2 can avoid data collision in the CSMA / CD network by permitting transmission to the transmission stations 5a to 5d one by one. Moreover, the transmission repeater control apparatus 2 can maintain real-time property by changing the number of transmission packets allocated to each transmission station according to the transmission right circulation time.

  As described above, in the railway vehicle transmission device of the present embodiment, the transmission lines are connected in a bus shape, and a plurality of transmission repeaters 1 flow dedicated packets for collision avoidance to the transmission lines. By appropriately controlling the port that repeats data according to the dedicated packet, it is possible to avoid data collisions in CSMA / CD networks, eliminate the restriction on the number of connection stages, and repeat data with low delay. become. Further, the transmission repeater control device 2 circulates a dedicated packet for transferring the transmission right to transmit data between the plurality of transmission repeaters 1 and 1 connected in a bus shape from the upstream side to the downstream side. Each transmission repeater 1 can be controlled so that the transmission right for transmitting data is within a certain period.

  In the present embodiment, each transmission repeater 1 has a plurality of transmission stations 5, and when a certain transmission repeater 1 obtains a transmission right, the transmission repeater control device 2 includes the transmission repeater 1 in the transmission repeater 1. Since the transmission right is sequentially circulated to each transmission station 5, when a certain transmission repeater 1 obtains the transmission right, the transmission repeater control device 2 sequentially transmits the transmission right to each transmission station 5 in the transmission repeater 1. By repeating this, data collision can be eliminated and data can be repeated at high speed. Further, the transmission repeater control device 2 monitors the cycle in which the transmission right circulates in the transmission repeater 1, and circulates the transmission right except for a specific transmission station among the plurality of transmission stations 5 when a predetermined time has elapsed. Since the transmission right is transferred to the downstream transmission repeater 1, the transmission right is not circulated except for a specific transmission station among the plurality of transmission stations 5 in the transmission repeater 1, and the downstream transmission relay 1 The transmission right can be transferred quickly, and the variation in the cycle in which the transmission right makes a round can be reduced.

  In the above embodiment, the flow control defined by IEEE 802.3x is used for transmission suppression of each transmission station 5a to 5d. However, in the case of a half-duplex line, back pressure is continuously applied and transmission is performed. It can also be a suppression system.

[Second Embodiment]
Next, the railway vehicle transmission apparatus according to the second embodiment of the present invention will be described. The second embodiment has a transmission station for transmitting / receiving local data to / from a trunk transmission transmitter / receiver and a plurality of transmission transmitter / receivers, and performs data repeat control of each transmission transmitter / receiver and a dedicated packet between each transmission repeater. The transmission repeaters 11a to 11n equipped with the transmission repeater controller for creating and controlling the network and the transmission paths 13a to 13 (n-1) connecting the transmission repeaters are connected, and the transmission paths are connected in a bus shape. It is characterized by that. Further, each transmission repeater extends and uses the transmission right cyclic control method of the first embodiment, thereby avoiding a collision and improving the periodicity.

  FIG. 8 shows the configuration of the transmission path of the railway vehicle transmission apparatus according to the second embodiment. FIG. 9 shows the configuration of the transmission repeater of the railway vehicle transmission apparatus. The transmission repeaters 11a to 11n according to the present embodiment include two-port trunk line transmission / reception devices 14a and 14b, one or more transmission transmission / reception devices 15a and 15b (if the own car does not transmit / receive data), It is composed of a transmission repeater control device 12 that controls data repeat of the transmission port and controls a dedicated packet (token packet) between transmission repeaters, and a plurality of transmission stations 16a and 16b that perform data transmission / reception of the own car. .

  The transmission stations 16a and 16b of the own car may be inside the transmission repeater 11 or outside the transmission repeater 11. When there is a transmission station outside the transmission repeater 11, only the transmission transceiver 15 is mounted in the transmission repeater 11. FIG. 9 shows an example in which the transmission station 16 a is installed in the transmission repeater 11 and the transmission station 16 b is installed outside the transmission repeater 11. Further, there may be a plurality of transmission stations and associated transmission transceivers.

  In the transmission apparatus of the present embodiment, transmission repeaters 11a to 11n are connected in a bus shape by trunk transmission lines 13a to 13 (n-1).

  Next, the operation of the railway vehicle transmission device according to the second embodiment having the above-described configuration will be described. Here, the train is assumed to be a 6-car train and up to n = f.

(1) Reset First, the transmission repeater 11a side is defined as the upstream side of the network, and the 11g side is defined as the downstream side of the network. The definition of upstream / downstream may be reversed. Further, within the range where the network is effective, the transmission repeater 11a at the upstream end performs the master station operation for transmission as the most upstream.

  The transmission repeater 11a issues a reset packet as a cue for transmission right circulation. Each of the transmission repeaters 11b to 11f that has received the reset packet initializes the operation and enters into data reception preparation. Each transmission repeater 11a to 11f clears the internal timer when a reset packet is transmitted (or received). If there is data to be transmitted, the transmission repeater 11a transmits the data and transfers the transmission right downstream.

(2) Transmission right (from 11a to 11b)
The transmission repeater 11a issues a token packet for transferring the transmission right after transmitting necessary data. The transmission repeater 11b receives the token from the transmission repeater 11a and secures the transmission right. If there is transmission data, the transmission repeater 11b that secures the transmission right issues the token packet to the downstream transmission repeater 11c after transmitting the data. In this way, transmission rights are circulated sequentially.

  Now, assume that the time ta from the reset packet (t = 0) has elapsed while the transmission repeater 11c is transmitting data. Since each transmission repeater starts a timer at the time of transmitting a reset packet, it can be determined that the time ta has passed almost simultaneously for all the transmission repeaters.

(3) Transmission right (from 11c to 11d)
The transmission repeater 11c that has detected the elapse of the ta time transfers the transmission right to the downstream transmission repeater 11d immediately after the end of the data currently being transmitted.

(4) Through (11d)
The transmission repeater 11d receives the token from the transmission repeater 11c, but since the time ta has already passed at that time, the transmission right is immediately transferred further downstream without transmitting its own data.

(5) Through (11e)
The transmission repeater 11e receives the token from the transmission repeater 11d, but since the time ta has already passed, the transmission right is immediately transferred to the downstream transmission repeater 11f without transmitting its own station data.

(6) Control command transmission (11f)
Since the transmission repeater 11f is a transmission station that transmits a control command, when the token is received from the transmission relay 11e, the control relay “data 1” is transmitted. This control command “data 1” is repeated and reaches each transmission repeater 11a to 11e.

  In the present embodiment, the transmission repeater 11f is used as a control command transmission node. However, if the transmission repeater 11f is not a control command transmission node, “data 1” is not transmitted and the process proceeds to the next step.

(7) Return The transmission repeater 11f issues a reset packet after transmitting the control command data. The reset packet arrives at each transmission repeater 11a to 11e, and the transmission right is completed and returns to the transmission repeater 11a.

  As described above, as shown in the timing chart of FIG. 12, it is possible to complete the transmission right within the target time and transmit the control command to each transmission repeater within a predetermined time.

  In the next lap, if the transmission repeater that was sent last time is passed through and the transmission right is sent to the transmission repeater that passed last time, the control command can be sent within a certain time and the load can be balanced. Is possible.

  It is also possible to set the time reference by using control command data instead of a reset packet. In that case, the service type included in the IP header can be used to increase the priority of the control command data and decrease the priority of other data. Also, a method of defining in data without using an IP header may be used.

  Next, an operation for allowing the transmission repeater for transmitting the control command to transmit the control command data at a constant period by temporarily holding the transmission right will be described with reference to FIG. In the present embodiment, the transmission repeater that transmits the control command is described as the transmission repeater 11a.

  Since the transmission repeater 11a is a transmission repeater that transmits a control command, the timer is cleared when the control command data is transmitted. Each transmission repeater 11b to 11f sequentially circulates the transmission right and transmits data only when it has the transmission right.

  Next, if the transmission repeater 11a receives the transmission right after the timing when the time ta (set shorter than the target control command transmission cycle) has elapsed, it determines that the transmission cycle will not be in time for another cycle. The transmission of the transmission right is stopped until the control command transmission time (target transmission cycle). At the control command transmission timing, since the transmission repeater 11a holds the transmission right and is in a waiting state, the control command data is immediately transmitted to all the transmission repeaters 11b to 11f.

  When the traveling direction is reversed and the transmission repeater 11f becomes a control command transmission transmission repeater, the transmission repeater 11f holds the transmission right and enters a waiting state.

  In this way, by temporarily holding the transmission right in the transmission repeater that transmits the control command, it is possible to transmit the control command data at a constant cycle.

  Next, the operation of transmitting the control command data at a constant cycle without temporarily returning the transmission right to the most upstream station by temporarily suspending the transmission right will be described with reference to FIGS. Here, the trunk line transmission / reception units 14a and 14b support full duplex. However, the number of lines may be two lines instead of only four lines. By using an echo canceller, full-duplex communication is possible even with two lines. The control command transmission transmission repeater is the transmission repeater 11a, and the time reference is the reset packet.

(1) Transmission repeater 11d transmission Now, it is assumed that the transmission repeater 11d has the transmission right and the limit time ta has passed during the data transmission.

(2) Time-up (temporary stop packet transmission)
When the limit time ta (control command data transmission cycle—one packet maximum time) elapses, the transmission repeater 11a that transmits the control command puts the transmission right on hold for the transmission repeater 11d that currently has the transmission right. Send a STOP packet. Since data 1 from the transmission repeater 11d is repeated on the upstream route, it does not collide with the STOP packet issued by the transmission repeater 11a. Further, even when the transmission repeater that transmits the control command is the transmission repeater 11f, there is no collision with the data from the transmission repeater 11d because the route is different.

  The transmission repeater 11d that has received the STOP packet puts the transmission right on hold after completing the transmission of the currently transmitted packet. Since the other transmission repeaters do not hold the transmission right, no data flows through the network.

(3) Control command data transmission (11a)
The transmission repeater 11a confirms that the network is free and transmits the control command data “data 2” at a predetermined transmission cycle. The other transmission repeaters 11b to 11f can receive this "data 2" almost simultaneously.

(4) Resumption When the transmission repeater 11a finishes transmitting the control command data “data 2”, it issues a release packet for resuming transmission right circulation to the downstream side. The release packet is a packet that is valid only for the transmission repeater that holds the transmission right, and the transmission repeater that does not hold the transmission right repeats this release packet. If the transmission repeater 11d having the transmission right receives the release packet, the transmission repeater 11d returns from the transmission right holding state to the transmission right holding state.

(5) Transmission repeater 11d data transmission The transmission repeater 11d that has returned to the transmission right holding state transmits "data 3". If there is no data to be transmitted, the process proceeds to the next step.

(6) Transmission right transfer The transmission repeater 11d that has transmitted the necessary data issues a token packet to transfer the transmission right to the transmission repeater 11e.

  As described above, as shown in FIG. 16, by temporarily suspending the transmission right, it is possible to transmit the control command data at a constant period without returning the transmission right to the most upstream station.

  In this embodiment, the transmission repeater that has received the STOP packet shifts to the transmission right suspension state after transmitting the data currently being transmitted. However, the transmission repeater stops transmission at the same time as the STOP packet is received and enters the transmission suspension state. You may make it transfer. In this case, the limit time ta can be brought close to the transmission cycle until “transmission cycle-repeat time”. Instead, the aborted data needs to be transmitted again when returning to transmission right holding.

[Third Embodiment]
Next, a railway vehicle transmission device according to a third embodiment of the present invention will be described. In the present embodiment, a ladder-shaped transmission line is formed by inter-system transmission lines that connect between main transmission lines and sub-system trunk transmission lines that connect between transmission repeaters across vehicles and between transmission repeaters in each vehicle. The main transmission line and the secondary transmission line in the horizontal direction of the ladder-shaped transmission line are used as trunk transmission lines, and each transmission repeater is an inter-system transmission line in the vertical direction of the trunk transmission line and the ladder-shaped transmission line. And repeat transmission of data, and each transmission repeater performs transmission control by extending the transmission right cyclic control of the first embodiment, thereby avoiding collision and repeating data with low delay It is characterized by doing.

  FIG. 17 shows the configuration of the transmission path of the railway vehicle transmission apparatus according to the third embodiment, and FIG. 18 shows the configuration of the transmission repeater of the railway vehicle transmission apparatus. The main transmission repeaters 21a to 21n and the subordinate transmission repeaters 21a 'to 21n' of the present embodiment include two ports of main transmission transmitters / receivers 24a and 24b, one port of intersystem transmission transmitter / receiver 24c, and one or more ports. Transmission transmitter / receiver 25a, 25b (0 or more ports if own car does not send / receive data) and transmission repeater for controlling data repeat of each transmission port and for controlling dedicated packet (token packet) between transmission repeaters It is comprised from the control apparatus 22 and the some transmission station 26a, 26b which performs data transmission / reception of the own car. The transmission stations 26a and 26b of the own car may be inside the transmission repeater or outside the transmission repeater. As shown in the figure, when there is a transmission station 26b outside the transmission repeater, only the transmission transceiver 25b is mounted in the transmission repeater. Further, there may be a plurality of transmission stations and associated transmission transceivers as shown.

  In the transmission apparatus of the present embodiment, the main transmission repeaters 21a to 21n are connected to the main transmission lines 23a to 23 (n-1), and the main transmission transmission lines 21a 'to 21n' are connected to the main transmission lines. Routes 23a 'to 23 (n-1)' are connected, and the intersystem transmission paths 23a "to 23n" are connected between the main transmission repeaters 21a to 21n and the subordinate transmission repeaters 21a 'to 21n' in each vehicle. As a whole, a ladder-shaped transmission line network is configured.

  The operation of the embodiment configured as described above will be described with reference to FIGS. 19 to 23 show the flow of data in the present embodiment, and FIGS. 24 to 25 show the flow of dedicated packets in the present embodiment. In this operation description, it is assumed that both trains are used and n = f.

  First, the data flow of the present embodiment will be described with reference to FIGS.

(1) Transmission path configuration As shown in FIG. 19, the first car is provided with a main transmission repeater 21a and a subordinate transmission repeater 21a ′, and is connected to the main main transmission line 23a and the subordinate main transmission line 23a ′. Are connected to the main transmission repeater 21b and the subordinate transmission repeater 21b 'of the second car. The main transmission repeater 21a and the subordinate transmission repeater 21a 'are connected by an inter-system transmission path 23a ". Transmission repeaters 21b, 21b' to 21f, from the second car to the sixth car, 21f 'is installed, and is connected in a ladder shape by trunk transmission lines 23b, 23b' to 23e, 23e 'and intersystem transmission lines 23a "to 23f".

  In the present embodiment, the transmission repeater 21a side is defined as the upstream side of the network, and the transmission repeater 21f side is defined as the downstream side of the network. The definitions of upstream and downstream may be reversed. Further, within the range where the network is effective, the transmission repeater 21a at the upstream end performs the master station operation for transmission as the most upstream. Further, priority is given to the transmission repeaters 21a to 21f on the main system side over the transmission relay apparatuses 21a 'to 21f' on the secondary system side. That is, for example, when the main transmission repeater 21a is normal, it operates as a master station, and when the main transmission repeater 21a is abnormal, the subordinate transmission repeater 21a 'performs a master station operation.

(2) Normal data flow (21a transmission data)
A case where the network is normal and the transmission repeater 21a has a transmission right will be described with reference to FIG. The transmission repeater 21a simultaneously transmits “data 1” to the downstream transmission repeater 21b via the main transmission line 23a and to the secondary transmission repeater 21a ′ via the intersystem transmission line 23a ″. Each transmission repeater basically transmits data repeatedly to all ports (main line transmission line, intersystem transmission line, transmission station) other than the received port when data is received. However, in this state, each transmission repeater receives the same “data 1” from the main transmission line and the intersystem transmission line connected thereto, so that “data 1” can be duplicated. In order to avoid this, when each transmission repeater receives the same “data 1” from the main transmission line and the inter-system transmission line, the data received on a first-come-first-served basis is given priority and a repeat operation starts.

  Note that the same data is determined using an identifier included in the IP header (usually incremented by one each time an IP packet is transmitted). In the present embodiment, the following description will be made by using the identifier of the IP header for the determination of the same data. However, a method of incorporating a sequence number or the like sequentially updated in the data frame may be used.

  Each transmission station operates as follows.

  Transmission repeater 21a: “Data 1” is transmitted to the transmission repeaters 21b and 21a ′.

  Transmission repeater 21a ': "Data 1" is received from the intersystem transmission path 23a ", and" Data 1 "is repeated to the downstream transmission repeater 21b'.

  Transmission repeater 21b: “Data 1” is received from the upstream via the trunk transmission line 23a, the trunk transmission line 23b is sent to the downstream transmission repeater 21c, and the inter-system transmission line 23b ″ is sent to the transmission repeater 21b ′. Repeat “Data 1”.

  Transmission repeater 21b ′: Receives “data 1” from the upstream transmission repeater 21a ′ via the trunk transmission line 23a ′ and from the transmission repeater 21b via the intersystem transmission line 23b ″, Adopt and repeat "Data 1" to the downstream transmission repeater 21c '.

  Here, since “data 1” has been received from the inter-system transmission line 23b ″, it is not transmitted to the inter-system transmission line 23b ″, but transmitted to the inter-system transmission line and received by the transmission repeater 21b side. It may be set to be discarded.

  Transmission repeater 21c: “Data 1” is received from the upstream via the trunk transmission line 23b, the downstream transmission repeater 21d via the trunk transmission line 23c, and the transmission repeater 21c ′ via the intersystem transmission line 23c ″. Repeat “Data 1”.

  Transmission repeater 21c ′: Receives “data 1” from the upstream on the main transmission line 23b ′ and from the transmission repeater 21c on the intersystem transmission line 23c ″, adopts the first-arrived data, and transmits the transmission downstream. Repeat “Data 1” to the device 21d ′.

  Such an operation is repeated, and all transmission repeaters receive “data 1”.

(3) Data flow when the transmission repeater 21c fails (21a transmission data)
A data flow when the main transmission repeater 21c fails will be described with reference to FIG.

  Transmission repeater 21a: “Data 1” is transmitted to the transmission repeaters 21b and 21a ′.

  Transmission repeater 21a ': "Data 1" is received from the intersystem transmission path 23a ", and" Data 1 "is repeated to the downstream transmission repeater 21b'.

  Transmission repeater 21b: “Data 1” is received from the upstream by the trunk transmission line 23a, and the transmission repeater 21b ′ is received by the downstream transmission repeater 21c by the trunk transmission line 21b and by the intersystem transmission line 23b ″. Repeat “Data 1”.

  Transmission repeater 21b ': "Data 1" is received from the upstream transmission repeater 21a' on the main transmission line 23a 'and from the transmission repeater 21b on the intersystem transmission line 23b ", and the first-come-first-served data is adopted. Repeat “Data 1” to the downstream transmission repeater 21c ′.

  Here, since “data 1” has already been received from the intersystem transmission path 23b ″, it is not transmitted to this intersystem transmission path 23b ″, but may be transmitted and discarded on the transmission repeater 21b side. .

  Transmission repeater 21c: Data reception / transmission stopped due to failure.

  Transmission repeater 21c ′: “Data 1” is received from the upstream via the trunk transmission line 23b ′, but “Data 1” does not come from the intersystem transmission line 23c ″, so the downstream transmission repeater 21d ′ "Data 1" is repeated to the transmission repeater 21c between the systems.

  Transmission repeater 21d: Since data does not come from upstream due to failure of the transmission repeater 21c, “data 1” from the transmission repeater 21d ′ between the systems is repeated downstream.

  Transmission repeater 21d ′: “Data 1” is received from the upstream on the trunk transmission line 23c ′, but “Data 1” does not come from the intersystem transmission path 23d ″, so the downstream transmission repeater 21e and the intersystem Repeat "Data 1" to the transmission repeater 21d.

  In this way, even when the transmission repeater 21c fails, “data 1” is received by all the transmission repeaters.

(4) Normal data flow (21c transmission data)
The case where the transmission repeater 21c has a transmission right will be described with reference to FIG.

  Transmission repeater 21c: “Data 2” is transmitted to the transmission repeater 21b upstream of the trunk line, the transmission repeater 21d downstream of the trunk line, and the transmission repeater 21c ′ between the systems.

  Transmission repeater 21c ': "Data 2" is received from the transmission repeater 21c between the systems, and "Data 2" is repeated to the downstream transmission repeater 21d' and the upstream transmission repeater 21b '.

  Transmission repeater 21d: Receives “data 2” from the upstream transmission repeater 21c, and repeats “data 2” to the downstream transmission repeater 21e and the transmission repeater 21d 'between the systems.

  Transmission repeater 21d ′: Receives “data 2” from the transmission repeater 21c ′ upstream of the trunk line and the transmission repeater 21d between the systems, adopts the first-arrival data, and sends the “data 2” to the downstream transmission repeater 21e ′. "Repeat".

  Transmission repeater 21b: "Data 2" is received from the transmission repeater 21c downstream of the trunk line, and "Data 2" is repeated to the transmission repeater 21a upstream of the trunk line and the transmission repeater 21b 'between the systems.

  Transmission repeater 21b ′: Receives “data 2” from the transmission repeater 21c ′ downstream of the trunk line and the transmission repeater 21b between the systems, adopts the first-arrival data, and sends the “data 2” to the upstream transmission repeater 21a ′. "Repeat".

  Transmission repeater 21a: Receives “data 2” from the transmission repeater 21b downstream of the trunk line, and repeats “data 2” to the transmission repeater 21a ′ between the systems.

  Transmission repeater 21a ': Receives "data 2" from the transmission repeater 21b' downstream of the trunk line and the transmission repeater 21a between the systems, and uses the first-arrival data.

  By repeating such an operation, all transmission repeaters receive “data 2”.

(5) Data flow when the transmission repeater 21b fails (21c transmission data)
Next, the flow of data when the transmission repeater 1b fails will be described with reference to FIG.

  Transmission repeater 21c: “Data 2” is transmitted to the transmission repeater 21b upstream of the trunk line, the transmission repeater 21d downstream, and the transmission repeater 21c ′ between the systems.

  Transmission repeater 21c ': "Data 2" is received from the transmission repeater 21c between the systems, and "Data 2" is repeated to the downstream transmission repeater 21d' and the upstream transmission repeater 21b '.

  Transmission repeater 21d: Receives “data 2” from the upstream transmission repeater 21c, and repeats “data 2” to the downstream transmission repeater 21e and the transmission repeater 21d 'between the systems.

  Transmission repeater 21d ′: Receives “data 2” from the transmission repeater 21c ′ upstream of the trunk line and the transmission repeater 21d between the systems, adopts the first-arrival data, and sends the “data 2” to the downstream transmission repeater 21e ′. "Repeat".

  Transmission repeater 21b: Data reception / transmission stopped because of failure.

  Transmission repeater 21b ′: “Data 2” is received from the transmission repeater 21c ′ downstream of the main line, but “Data 2” does not come from the transmission repeater 21b between the systems. "Data 2" is repeated to the transmission repeater 21b between the systems.

  Transmission repeater 21a ′: “data 2” is received from the transmission repeater 21b ′ downstream of the trunk line, but “data 2” does not come from the transmission repeater 21a between the systems, so the transmission repeater 21a between the systems Repeat “Data 2”.

  Transmission repeater 21a: Since data does not come from the main line downstream due to a failure of the transmission repeater 21b, only "data 2" is received from the transmission repeater 21a 'between the systems.

  In this way, even if the transmission repeater 1b fails, “data 2” is received by all the transmission repeaters.

  Next, the flow of dedicated packets between transmission repeaters in the present embodiment will be described with reference to FIGS.

(1) Reset As shown in FIG. 24, a reset packet is issued by the most upstream main transmission repeater 21a as a cue to circulate the transmission right. Further, when each transmission repeater receives the reset packet, it stops the operation currently being executed and shifts to a token waiting state. As a result, the network is initialized.

  The transmission repeater that has received the reset packet transmits the reset packet downstream to the main line, and to the transmission repeater between the systems when no reset is received.

  Transmission repeater 21a: A reset packet is transmitted to the transmission repeater 21b downstream of the main line and the transmission repeater 21a 'between the systems.

  Transmission repeater 21a ': Receives a reset packet from the transmission repeater 21a between systems and transmits it downstream.

  Transmission repeater 21b: A reset packet is received from the transmission repeater 21a upstream of the trunk line, and transmitted to the transmission repeater 21c downstream of the trunk line and the transmission repeater 21b 'between the systems.

  Transmission repeater 21b ': A reset packet is received from the transmission repeater 21a' upstream of the trunk line and the transmission repeater 21b between the systems, and transmitted downstream. If no reset packet is received from the inter-system transmission repeater, the packet is also transmitted to the inter-system transmission repeater.

  Such an operation is repeated, and all transmission repeaters receive the reset packet from the transmission repeater 21a.

(2) Token (21a → 21b)
The token packet is a packet for transferring the transmission right and flows from upstream to downstream. Here, the case where the transmission right is transferred from the transmission repeater 21a to the transmission repeater 21b will be described with reference to FIG.

  The transmission repeater 21a transmits the token packet to the downstream transmission repeater 21b. The transmission repeater 21b transmits a token ACK packet as a signal of receiving the token packet. When the transmission repeater 21a receives the token ACK packet, the transfer of the transmission right is completed. Similarly, the transmission right circulates to the most downstream transmission repeater 21f.

  In this embodiment, a token ACK packet is used. However, it may be set to determine whether there is repeat data within a certain time. This is possible because the transmission repeater 21a receives data within a certain time if the transmission right has been transferred to the transmission repeater 21b.

(3) Token (when 21b fails)
As shown in FIG. 26, if a token ACK packet is not returned within a certain time after the transmission repeater 21a issues a token packet to the transmission repeater 21b, the transmission repeater 21a It is determined that the device 21b is faulty or the transmission path is abnormal, and the token packet is bypassed.

  The transmission repeater 21a issues a token packet to the transmission repeater 21a ′ using the intersystem transmission path 23a ″. Since the transmission repeater 21a ′ is a subordinate transmission repeater, the token packet from the intersystem Even if the token is received, the token packet is repeated to the downstream transmission repeater 21b ′ without retaining the transmission right. Once, a token packet is issued to the transmission repeater 21b via the inter-system transmission path 23b "to confirm whether it can be returned to the main system.

  If a token ACK packet is obtained from the transmission repeater 21b, it is determined that the failure is not in the transmission repeater 21b but in the transmission path, and the transmission right is transferred to the transmission repeater 21b. Here, the transmission right is transferred from the transmission relay 21a → 21b → 21c, but the transmission path is the transmission relay 21a → 21a ′ → 21b ′ → 21b → 21c.

  If there is no token ACK packet from the transmission repeater 21b, the transmission repeater 21c holds the transmission right and issues a token ACK packet as a response. The transmission relay 21a 'repeats the token ACK packet to the transmission relay 21a, thereby completing the transmission right transfer from the transmission relay 21a to the transmission relay 21b'.

  In the present embodiment, the transmission right is not given to the secondary transmission repeater 21a ', but the setting may be given. However, in that case, since the data of the transmission repeater 21a, 21a 'of the first car is transmitted to the remaining transmission repeaters, it is necessary to determine which data is to be adopted by the upper application. When the token NAK packet is returned from the transmission repeater 21b to the token packet, the token is discarded. This prevents the creation of multiple tokens. This occurs when only the transmission line from the transmission repeater 21b to the transmission repeater 21a is disconnected. In this case, the data from the downstream cannot be finally received for a long time. It is necessary for the device 21a to disconnect the line as a failure of the transmission repeater 21b.

(4) Token (return to main system)
As shown in FIG. 27, the transmission repeater 21b ′ having obtained the transmission right performs transmission right transfer downstream after data transmission. The transmission repeater 21b ′ issues a token packet to the downstream transmission repeater 21c ′. Since the transmission repeater 21c ′ that has received the token is a subordinate transmission repeater, it issues a token packet to the transmission repeater 21c in order to confirm whether the transmission right can be returned to the main system. When the token ACK packet is received from the transmission repeater 21c, the transmission right is transferred to the transmission repeater 21c without holding the transmission right.

(5) Token flow (21b failure)
As shown in FIG. 28, when the above operations are summarized, when the transmission repeater 21b fails, the token packet flows in the order of the transmission repeater 21a → 21a ′ → 21b ′ → 21c ′ → 21c → 21d → 21e → 21f. become. Among these, the transmission repeater 21a ′ and the transmission repeater 21c ′ do not hold the transmission right, and the increase in network load can be minimized.

(6) Return As shown in FIG. 29, when the token packet flows to the most downstream transmission repeater 21f and the transmission repeater 21f finishes data transmission, the transmission repeater is notified to notify that the transmission right is completed. 21f issues a return packet. The return packet is sequentially repeated upstream in the same manner as the reset, and is finally transmitted to the transmission repeater 21a which is the most upstream station.

As shown in FIG. 30, even when a transmission repeater on the way (here, transmission repeater 21c) is out of order, a return packet can be returned to the transmission repeater 21a using the intersystem transmission path. .

[Fourth Embodiment]
Next, a railway vehicle transmission device according to a fourth embodiment of the present invention will be described. The railway vehicle transmission apparatus according to the present embodiment has inter-system transmission that connects between a main trunk transmission line and a secondary trunk transmission path that connect between transmission repeaters across vehicles and between transmission repeaters in each vehicle. A ladder-shaped transmission line is configured by the road, and the main trunk transmission line and the secondary trunk transmission line, which are in the horizontal direction of the ladder-like transmission line, are normally used bus-type trunk transmission lines, and each transmission repeater is normal. Sometimes this transmission line is used to repeat data, and the transmission line in the vertical direction of the ladder-like transmission line is an intersystem transmission line, and when an abnormality occurs in the transmission repeater or transmission line, the transmission repeater In addition, each transmission repeater performs transmission right cycle control similar to that of the first embodiment to avoid collision and repeat data with low delay. It is characterized by.

  Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 31 shows the configuration of the transmission path of the railway vehicle transmission apparatus of the present embodiment, and FIG. 32 shows the configuration of the transmission repeater of the railway vehicle transmission apparatus of the present embodiment.

  The main transmission repeaters 31a to 31n and the subordinate transmission repeaters 31a 'to 31n' according to the present embodiment include a 2-port trunk line transmission / reception device 34a, 34b, a 1-port inter-system transmission transmission / reception device 34c, and one or more ports. Transmission transceivers 35a and 35b (0 or more ports if the own car does not exchange data) and transmission repeaters that control data repeat of each transmission port and also control dedicated packets (token packets) between transmission repeaters It consists of a control device 32 and a plurality of transmission stations 36a, 36b that perform data transmission / reception of the own car. The transmission stations 36a and 36b of the own car may be in the transmission repeater or outside the transmission repeater. However, when there is a transmission station outside the transmission repeater, only the transmission transceiver is mounted in the transmission repeater. FIG. 32 shows an example in which the transmission station 36 a is installed in the transmission repeater 31 and the transmission station 36 b is installed outside the transmission repeater 31. Furthermore, there may be a plurality of transmission stations 36a and 36b and transmission transceivers 35a and 35b associated therewith.

  In the transmission apparatus according to the present embodiment, the main transmission repeaters 31a to 31n are connected by the main transmission lines 33a to 33 (n-1), and the sub transmission repeaters 31a 'to 31n' are connected to the main line. The transmission lines 33a ′ to 33 (n−1) ′ are connected, and the intersystem transmission lines 33a ″ to 33n are connected between the main transmission relays 31a to 31n and the subordinate transmission relays 31a ′ to 31n ′. “They are connected to each other to form a ladder-like transmission line network as a whole.

  The operation of the present embodiment configured as described above will be described with reference to FIGS. FIG. 33 shows a network configuration during normal operation. In FIG. 33, a 7-car train is assumed and n = g.

  First, a primary transmission repeater 31a and a secondary transmission repeater 31a 'are installed in the first vehicle, and are connected to the second vehicle by a primary transmission path 33a and a secondary transmission path 33a'. The main transmission repeater 31a and the subordinate transmission repeater 31a 'are connected by an intersystem transmission line 33a ". From the second car to the seventh car, the transmission repeaters 31b to 31g; 31b' to 31g ′ is installed and connected in a ladder shape by transmission lines 33b to 33f; 33b ′ to 33f ′; 33b ″ to 33g ″.

  In this embodiment, the transmission repeater 31a side is defined as the upstream side of the network, and the 31g side is defined as the downstream side of the network. The definitions of upstream and downstream may be reversed. Further, within the range where the network is effective, the transmission repeater 31 at the upstream end performs the master station operation of transmission as the most upstream. That is, as the network configuration is changed, the transmission repeater 31 operating as a master station moves.

  Hereinafter, the operation of network configuration construction when an abnormality occurs in this configuration will be described.

(1) Normal State First, the network configuration when the network is normal will be described with reference to FIG. When normal, the main transmission repeaters 31a to 31g constitute one network (1), and the subordinate transmission repeaters 31a ′ to 31g ′ constitute one network (2). Since network (1) and network (2) are independent, train control data is sent to network (1), and data different from IT service data is sent to network (2) to increase the network capacity. can do. Of course, the same type of data may be sent in the network (1) and the network (2).

  At this time, in the network (1) on the main system side, dedicated token packets and main data flow between the transmission repeaters 31a-31b-31c-31d-31e-31f-31g. Here, the dedicated token packet is the transmission right circulating packet shown in the first embodiment.

(2) Transmission repeater 31c failure As shown in FIG. 34, when the main transmission repeater 31c fails, the transmission repeaters 31b and 31d at both ends of the transmission repeater 31c detect the failure of the transmission repeater 31c. At this time, the network (1) is divided into the network (1) ′ of the transmission repeaters 31a-31b and the network (1) ″ of the transmission repeaters 31d-31e-31f-31g. The transmission repeaters 31b and 31d are networked. In order to reconfigure (1), data is repeated on the intersystem transmission lines 33b ", 33d".

(3) Network (1) Reconfiguration As shown in FIG. 35, when the subordinate transmission repeaters 31b 'and 31d' receive data from the intersystem transmission path, an abnormality occurs in the main transmission path, that is, the network (1). The slave network (2) is divided and the main network (1) is reconfigured.

  For this purpose, the transmission repeater 31b 'checks the address (IP address) of the received data. If the address is upstream of the transmission repeater 31b ′, that is, the address of the transmission repeater 31a, it is determined that an abnormality has occurred in the downstream network of the transmission repeater 31b, and the downstream transmission path is activated. And data repeat.

  The transmission repeater 31d 'checks the address (IP address) of the received data. If the address is on the downstream side of the transmission repeater 31d ', for example, in the case of the addresses of the transmission repeaters 31e, 31f, 31g, it is determined that an abnormality has occurred in the upstream network, the upstream transmission path is made valid, Repeat.

  As a result, the main network (1) divided into the network (1) ′ and the network (1) ″ is transferred to the transmission repeaters 31a-31b-31b′-31c′-31d′-31d-31e-31f- The network (1) can be re-established between 31 g, and in this case, the slave network (2) is the network (2) ′ of the transmission repeater 31e′-31f′-31g ′ and the transmission repeater 31a ′ alone. Network (2) ".

(4) Network Restoration Operation As shown in FIG. 36, a transmission path bypassing the transmission repeaters 31a-31b-31b'-31c'-31d'-31d-31e-31f-31g due to a failure of the transmission repeater 31c is restored. Therefore, the transmission repeaters 31b and 31d transmit dedicated packets for checking to the transmission repeater 31c at a constant period.

  When a response from the transmission repeater 31c is obtained, it is determined that the transmission repeater 31c has been restored, and the original normal network is restored.

  In this embodiment, the check packet is transmitted from the transmission repeaters 31b and 31d. However, by transmitting only from the upstream side of the network, a pair of twisted pairs can be supported.

  In the present embodiment, the abnormality on the master side is determined from the address of the received data. However, data may be exchanged directly between the master and slave transmission repeaters 31b-31b '. Information (another communication or digital signal) may be exchanged directly.

  Next, another example of the network configuration and token packet flow according to the present embodiment will be described with reference to FIGS. In FIG. 37, a vehicle having a 7-car train is assumed and n = g is set. Note that the operation from when the network is normal to when the transmission repeater 31c fails is the same as that described with reference to FIGS.

(1) Network (1) Reconfiguration As shown in FIG. 37, when the subordinate transmission repeaters 31b ′ and 31d ′ receive data from the intersystem transmission path, there is an abnormality in the network (1) that is the main transmission path. It is determined that it has occurred, the slave network (2) is divided, and the main network (1) is reconfigured.

  The transmission repeater 31b 'checks the received data address (IP address). If the address is upstream of the transmission repeater 31b ′, that is, the address of the transmission repeater 31a, it is determined that an abnormality has occurred in the downstream network of the transmission repeater 31b, and the downstream transmission path is activated. And data repeat.

  The transmission repeater 31d 'checks the address (IP address) of the received data. If the address is downstream of the transmission repeater 31d ′, for example, if it is the address of the transmission repeaters 31e, 31f, 31g, it is determined that an abnormality has occurred in the upstream network, and the upstream transmission path is made valid. Repeat data.

  As a result, the main network (1) divided into the network (1) ′ and the network (1) ″ is transferred to the transmission repeaters 31a-31b-31b′-31c′-31d′-31d-31e-31f- The network (1) can be constructed again between 31g.

  In the present embodiment, the abnormal part on the main system side is determined from the address of the received data. However, data may be directly exchanged between the main and subordinate transmission repeaters 31b-31b ′. Further, information (separate communication or digital signal) may be exchanged directly.

  Further, in the present embodiment, the transmission repeater 31b 'performs data repeat transmission to the upstream side, and the transmission repeater 31d' performs data repeat transmission to the downstream side. As a result, it is possible to receive the data of the primary network (1) even in the secondary transmission repeaters 31a ', 31e', 31f ', 31g' which have been divided in the transmission control.

(2) Flow of control packet when transmission relay 31c fails As shown in FIG. 38, when transmission relay 31c fails, the token packet is transmitted from transmission relay 31a → 31b → 31b ′ → 31c ′ → 31d ′ → 31d → It flows as 31e → 31f → 31g. The transmission repeater 31b ′ passes only the reset packet to the upstream transmission repeater 31a ′ without flowing the token packet. The transmission repeater 31d ′ sends only a reset packet to the downstream transmission repeater 31e ′ without sending a token packet. Receiving the reset packet, the transmission repeater 31e ′ automatically repeats the reset packet to the transmission repeater 31f ′. As a result, the transmission data is not passed to the transmission repeaters 31a ′, 31e ′, 31f ′, and 31g ′, but the main data can be shared.

  Next, still another example of the network configuration and the flow of token packets in the present embodiment will be described with reference to FIGS. Since the operation from when the network is normal to the operation of the failure of the transmission repeater 31c is the same as that described with reference to FIGS.

(1) Network 1 reconfiguration As shown in FIG. 39, when the subordinate transmission repeaters 31b ′ and 31d ′ receive data from the intersystem transmission path, an abnormality has occurred in the network (1) that is the main transmission path. The slave network (2) is divided and the main network (1) is reconfigured.

  For this purpose, the transmission repeater 31b 'checks the address (IP address) of the received data. If the address is upstream of the transmission repeater 31b ′, that is, the address of the transmission repeater 31a, it is determined that an abnormality has occurred in the downstream network of the transmission repeater 31b, and the downstream transmission path is activated. And data repeat.

  The transmission repeater 31d 'checks the address (IP address) of the received data. If the address is on the downstream side of the transmission repeater 31d ', for example, if it is the address of the transmission repeaters 31e, 31f, 31g, it is determined that an abnormality has occurred in the upstream network, and the upstream transmission path is made valid. , Repeat data.

  As a result, the main network (1) divided into the network (1) ′ and the network (1) ″ is transferred to the transmission repeaters 31a-31b-31b′-31c′-31d′-31d-31e-31f- The network (1) can be constructed again between 31g.

  In the present embodiment, the abnormal part on the main system side is determined from the address of the received data. However, data may be directly exchanged between the main and subordinate transmission repeaters 31b-31b ′. Further, information (separate communication or digital signal) may be exchanged directly.

  Further, in the present embodiment, the transmission repeater 31b ′ performs token circulation and data repeat transmission also to the upstream side, and the transmission repeater 31d ′ performs token circulation and data repetition also to the downstream side. Send. As a result, the slave transmission relays 31a ′, 31e ′, 31f ′, and 31g ′ that were separated in the control of FIGS. 33 to 36 can be incorporated into the master network (1). .

(2) Flow of control packet when transmission repeater 31c fails (reset)
As shown in FIG. 48, the reset packet issued by the transmission repeater 31a is repeated as the transmission repeater 31a → 31b → 31b ′ → 31c ′ → 31d ′ → 31d → 31e → 31f → 31g and the transmission repeater 31b ′. To the upstream transmission repeater 31a 'and from the transmission repeater 31d' to the downstream transmission repeater 31e '.

(3) Control packet flow (token) when the transmission repeater 31c fails
First, the token packet flows along a single stroke in the order of transmission repeaters 31a → 31b → 31b ′ → 31c ′ → 31d ′ → 31d → 31e → 31f → 31g.

(4) Control packet flow (return) when the transmission repeater 31c fails
As shown in FIG. 41, since the transmission repeater 31g is a terminal, it issues a return packet after data transmission. This return packet is repeated and returns to the transmission repeater 31d ′ in the order of the transmission repeaters 31g → 31f → 31e → 31d → 31d ′. Since the secondary transmission repeater 31d ′ can determine that a branch has occurred in the network, when the return packet is received, the secondary transmission repeater 31d ′ performs an operation of temporarily stopping without returning to the upstream side.

(5) Flow of control packet when transmission repeater 31c fails (token 2)
The transmission repeater 31d ′ that has received the return packet issues a token packet downstream from the branch instead of returning a return to the upstream. The token packet issued by the transmission repeater 31d ′ is transmitted in the order of the transmission repeater 31d ′ → 31e ′ → 31f ′ → 31g ′.

(6) Flow of control packet when transmission repeater 31c fails (Return 2)
As shown in FIG. 42, since the transmission repeater 31g ′ that has received the token is a terminal, it issues a return packet after data transmission. The return packet is repeated and returns to the transmission repeater 31b ′ in the order of the transmission repeater 31g ′ → 31f ′ → 31e ′ → 31d ′ → 31c ′ → 31b ′. Since the transmission repeater 31d ′ has already issued a token to the transmission repeaters 31d and 31e ′, this time, it repeats upstream without stopping the return. Since the secondary transmission repeater 31b ′ can determine that the network is branched, when the return packet is received, the secondary transmission repeater 31b ′ performs an operation of temporarily stopping without returning to the upstream side.

(7) Flow of control packet when transmission repeater 31c fails (token 3)
The transmission repeater 31b ′ that has received the return packet issues a token packet to the upstream side that is branched instead of returning a return to the transmission repeater 31b. The token packet issued by the transmission repeater 31b ′ is transmitted to the transmission repeater 31a ′.

(8) Flow of control packet when transmission repeater 31c fails (Return 3)
As shown in FIG. 43, since the transmission repeater 31a ′ that has received the token is a terminal, it issues a return packet after data transmission. This return packet is repeated and returns to the transmission repeater 31a ′ → 31b ′ → 31b → 31a. Since the transmission repeater 31b ′ has already issued a token to the transmission repeaters 31c ′ and 31a ′, this time repeats upstream without stopping the return. When the return packet returns to the transmission repeater 31a, the transmission right is completed.

(9) State of each station when the transmission repeater 31c fails The state of each station when the transmission repeater 31c has failed is that the transmission repeater 31a is the most upstream station, and the transmission repeaters 31a ', 31g, 31g' are the most downstream. Stations, and other stations become intermediate stations.

  This makes it possible to route token packets to all stations even in a branched network.

[Fifth Embodiment]
Next, a railway vehicle transmission apparatus according to a fifth embodiment of the present invention will be described. As shown in FIG. 44, the railway vehicle transmission apparatus according to the fifth embodiment includes a transmission station that transmits and receives data to and from the main line transmission transceiver, a plurality of transmission transceivers, and each transmission transceiver. Transmission repeaters 41a to 41n equipped with a transmission repeater control device for creating a dedicated packet between data repeat control and each transmission repeater to control the network, and transmission paths 43a to 43 (n) connecting the transmission repeaters -1), each of the transmission repeaters 41a to 41n is extended and used with the transmission right cyclic control method of the first embodiment to avoid collision and improve the periodicity. Features.

  Each of the transmission repeaters 41a to 41n of the present embodiment has the internal configuration shown in FIG. 45, and is one port or more with the two-port trunk line transmission / reception devices 44a and 44b (0 port or more when the own car does not exchange data). ) Transmission transceivers 45a and 45b, a data repeater control device 42 for controlling data repeat of each transmission port and controlling a dedicated packet (token packet) between the transmission relays, and a plurality of data transmission / reception of the own car Transmission stations 46a and 46b.

  The transmission stations 46a and 46b of the own car may be inside the transmission repeater 41 or outside the transmission repeater 41. When there is a transmission station outside the transmission repeater 41, only the transmission transceiver 45 is mounted in the transmission repeater 41. FIG. 45 shows an example in which the transmission station 46 a is installed in the transmission repeater 41 and the transmission station 46 b is installed outside the transmission repeater 41. Furthermore, there may be a plurality of transmission stations and associated transmission transceivers.

  In the transmission apparatus of the present embodiment, transmission repeaters 41a to 41n are connected in a bus shape by trunk transmission lines 43a to 43 (n-1). In addition, in this Embodiment, although shown with the example of a bus-like connection, it is also applicable to the ladder-shaped transmission line of the transmission apparatus for railway vehicles of 3rd Embodiment or 4th Embodiment.

  Next, the operation of the railway vehicle transmission device according to the fifth embodiment having the above-described configuration will be described. Here, the train is assumed to be an eight-car train and up to n = h.

(1) Reset Referring to FIG. 46, first, the transmission repeater 41a side is defined as the upstream side of the network, and the transmission repeater 41h side is defined as the downstream side of the network. The definition of upstream / downstream may be reversed. Further, within the range where the network is effective, the transmission repeater 41a at the upstream end performs the master station operation of transmission as the most upstream.

  Station numbers are set in advance in the transmission repeaters 41a to 41h. Here, 41a = 00h, 41b = 01h, 41c = 02h, 41d = 03h, 41e = 04h, 41f = 05h, 41g = 06h, 41h. = 07h. The station number may be a unique number, and the IP address of the own transmission station may be used.

  The transmission repeater 41a issues a reset packet as a cue for transmission right circulation. Each of the transmission repeaters 41b to 41h that has received the reset packet initializes the operation and enters into data reception preparation. Each transmission repeater 41a to 41h compares the transmission transmission station information included in the reset packet with the station number. The transmission transmission station information is sequentially updated as necessary every time a reset is issued. Here, a case where the transmission transmission station number is 02h will be described.

(2) Transmission command transmission (41a)
Referring to FIG. 46, transmission repeater 41a transmits only the control command necessary for train travel control because the transmission transmission station number and the local station number do not match.

(3) Transmission right (from 41a to 41b)
Similarly, referring to FIG. 46, transmission repeater 41a issues a token packet for shifting the transmission right downstream after completion of transmission of a control response necessary for train travel control.

(4) Transmission right (from 41b to 41c)
Referring to FIG. 47, transmission repeater 41b also transmits only the control response necessary for train travel control because the transmission transmission station number and the local station number do not match, and shifts the transmission right downstream.

(5) Travel command & monitor, service data transmission (41c)
Similarly, referring to FIG. 47, since the transmission repeater number and the own station number match, the transmission repeater 41c has a control response other than the control response required for train travel control such as monitor data and service data after the transmission of the control response. Also send data.

(6) Transmission right (from 41c to 41d)
Referring to FIG. 48, the transmission repeater 41c issues a token packet for shifting the transmission right downstream after transmitting all data.

  Thereafter, by repeating the same operation, as shown in the timing chart of FIG. 49, by distributing data transmissions other than the travel command (control command and control response), the transmission right is rounded within a certain time, and the travel command Can be transmitted to each transmission repeater within a certain time.

  In the present description, the comparison between the transmission transmission station number and the local station number has been described as being completely coincident. However, data other than the travel command can be transmitted to a plurality of transmission repeaters by applying a mask. For example, if bit 2 is masked and bits 0 and 1 are compared, even if the transmission transmission station number is 02h, the transmission repeater 41c and the transmission repeater 41g with the station numbers 02h and 06h send monitor data and service data Can be sent.

  Next, an operation for optimizing the periodicity of the travel command and the bandwidth allocated to data other than the travel command by circulating the transmission right a plurality of times will be described with reference to FIG. The transmission repeater 41a issues a reset (here, bit7 = '0') for transmitting a train travel command. When all the transmission repeaters 41a to 41h have finished transmitting the travel command data, the transmission repeater 41a issues a reset (here bit7 = '1') for transmitting data other than the travel command for the remaining time. . Each transmission repeater has a timer for monitoring time as in the second embodiment, and quickly returns the transmission right to the transmission repeater 41a, which is the master station, when the time is up. This operation is the same as in the second embodiment.

  In FIG. 50, the monitoring information is included in the information other than the travel command. However, if the monitoring data needs to have a periodicity, it is included in the travel command side, and the transmission transmission station number is included in the reset. Sex can be maintained. Thus, by circulating the data transmission right other than the travel command until the time is up, in the short train, the data band other than the travel command can be widened and the regularity of the travel command can be maintained.

  Moreover, although this Embodiment demonstrated by turning several transmission rights, the method of transmitting information other than a driving | running | working instruction | command at the time of a return packet may be sufficient.

  As described above, in the present invention, a CSMA / CD network is adopted, and dedicated packets are flowed only between transmission repeaters connected in a bus shape, thereby avoiding data collision and eliminating the number of connection stages. Therefore, it is possible to provide a railway vehicle transmission apparatus capable of repeating data with a low delay.

  In the present invention, a CSMA / CD transmission device can be used for a transmission station, and a railway vehicle transmission device having high versatility at low cost can be provided.

  The present invention further adopts a CSMA / CD network system, adds a transmission line connecting between transmission repeaters (in the same vehicle) connected in a master-slave two bus form, and forms a ladder-like transmission line structure. In addition, by using a vertical line (inter-system transmission line) of a ladder-like transmission line, a railway vehicle transmission apparatus with improved redundancy can be provided.

The block diagram which shows the transmission repeater and transmission-path state in the transmission apparatus for rail vehicles of one embodiment of this invention. The block diagram which shows the structure of the transmission repeater in the said embodiment. Explanatory drawing 1 which shows the flow of the control packet by the said embodiment. Explanatory drawing 2 which shows the flow of the control packet by the said embodiment. Explanatory drawing 3 which shows the flow of the control packet by the said embodiment. Explanatory drawing 1 which shows the transmission station transmission control operation | movement by the said embodiment. Explanatory drawing 2 which shows the transmission station transmission control operation | movement by the said embodiment. The block diagram which shows the transmission repeater and transmission-path state in the transmission apparatus for rail vehicles of the 2nd Embodiment of this invention. The block diagram which shows the structure of the transmission repeater in the said embodiment. Explanatory drawing 1 of the data transmission control by 2nd Embodiment. Explanatory drawing 2 of the data transmission control by 2nd Embodiment. The timing chart of the data transmission control by 2nd Embodiment. The timing chart of the data transmission control (when transmitting right is temporarily hold | maintained) by 2nd Embodiment. Explanatory drawing 1 of another data transmission control by 2nd Embodiment. Explanatory drawing 2 of another data transmission control by 2nd Embodiment. The timing chart of another data transmission control by 2nd Embodiment. The block diagram which shows the transmission repeater and transmission-path state in the transmission apparatus for rail vehicles of the 3rd Embodiment of this invention. The block diagram which shows the structure of the transmission repeater in the said embodiment. The block diagram which shows the structure of the transmission line in 3rd Embodiment. Explanatory drawing 1 of the data transmission control by 3rd Embodiment. Explanatory drawing 2 of the data transmission control by 3rd Embodiment. Explanatory drawing 3 of the data transmission control by 3rd Embodiment. Explanatory drawing 4 of the data transmission control by 3rd Embodiment. Explanatory drawing 1 of another data transmission control by 3rd Embodiment. Explanatory drawing 2 of another data transmission control by 3rd Embodiment. Explanatory drawing 3 of another data transmission control by 3rd Embodiment. Explanatory drawing 4 of another data transmission control by 3rd Embodiment. Explanatory drawing 5 of another data transmission control by 3rd Embodiment. Explanatory drawing 6 of another data transmission control by 3rd Embodiment. Explanatory drawing 7 of another data transmission control by 3rd Embodiment. The block diagram which shows the transmission repeater and transmission-path state in the transmission apparatus for rail vehicles of the 4th Embodiment of this invention. The block diagram which shows the structure of the transmission repeater in the said embodiment. Explanatory drawing 1 of the data transmission control by 4th Embodiment. Explanatory drawing 2 of the data transmission control by 4th Embodiment. Explanatory drawing 3 of the data transmission control by 4th Embodiment. Explanatory drawing 4 of the data transmission control by 4th Embodiment. Explanatory drawing 1 of another data transmission control by 4th Embodiment. Explanatory drawing 2 of another data transmission control by 4th Embodiment. Explanatory drawing 1 of another data transmission control by 4th Embodiment. Explanatory drawing 2 of another data transmission control by 4th Embodiment. Explanatory drawing 3 of another data transmission control by 4th Embodiment. Explanatory drawing 4 of another data transmission control by 4th Embodiment. Explanatory drawing 5 of another data transmission control by 4th Embodiment. The block diagram which shows the transmission repeater and transmission-path state in the transmission apparatus for rail vehicles of the 5th Embodiment of this invention. The block diagram which shows the structure of the transmission repeater in 5th Embodiment. Explanatory drawing 1 of the data transmission control by 5th Embodiment. Explanatory drawing 2 of the data transmission control by 5th Embodiment. Explanatory drawing 3 of the data transmission control by 5th Embodiment. The timing chart 1 of the data transmission control by 5th Embodiment. The timing chart 2 of the data transmission control by 5th Embodiment.

Explanation of symbols

1, 1a, 1b, ..., 1n Transmission repeater 2 Transmission repeaters 3a, 3b, ..., 3 (n-1) Transmission paths 4a, 4b, 4c, 4d Transmission transceivers 5, 5a, 5b, 5c, 5d Transmission Stations 6, 6a, 6b, 6c, 6d Transmission stations 11a, 11a ′, 11b, 11b ′,..., 11n, 11n ′ Transmission repeater 12 Transmission repeater control devices 13a, 13a ′, 13b, 13b ′,. (N-1), 13 (n-1) 'trunk transmission lines 13a ", 13b", ..., 13n "Intersystem transmission lines 14a, 14b, ..., 14d Transmission transceivers 15a, 15b Transmission stations 16a, 16b Transmission stations 21a, 21a ′, 21b, 21b ′,..., 21n, 21n ′ Transmission repeater 22 Transmission repeater controller 23a, 23a ′, 23b, 23b ′,..., 23 (n−1), 23 (n−1) 'Trunk transmission lines 23a ", 23b", ..., 23n " , 24d Transmission transceivers 25a, 25b Transmission stations 26a, 26b Transmission stations 31a, 31a ', 31b, 31b', ..., 31n, 31n 'Transmission relay 32 Transmission relay controller 33a, 33a ', 33b, 33b', ..., 33 (n-1), 33 (n-1) 'Trunk transmission lines 33a ", 33b", ..., 33n "Intersystem transmission lines 34a, 34b, ..., 34d Transmission / reception 35a, 35b Transmission station 36a, 36b Transmission station 41, 41a, 41b, 41c,..., 41n Transmission repeater 42 Transmission repeater controller 43a, 43b, 43c, ..., 43 (n-1) Transmission path 44a, 44b Main transmission transmitter / receiver 45a, 45b Transmission transmitter / receiver 46a, 46b Transmission station

Claims (4)

Each of the transmission repeater that receives data transmitted from other vehicles mounted on each vehicle and transmits it repeatedly, and the main transmission line that connects between the transmission repeaters of each vehicle, is a main system and a subordinate system. Railroad vehicle transmission comprising a dual-system, an inter-system transmission line connecting the transmission repeaters installed in the same vehicle, and forming a ladder-like transmission line between the main transmission line and the inter-system transmission line A device,
The transmission repeater of each vehicle is
A trunk transmission transceiver for transmitting and receiving data to and from the transmission repeater of the other vehicle;
An intersystem transmission transceiver that transmits and receives data to and from other transmission repeaters in the same vehicle;
A transmission repeater control device for controlling the trunk line transmission / reception unit and the intersystem transmission / reception unit to construct a network;
A transmission / reception device for transmitting / receiving data to / from the transmission repeater control device;
A transmission station connected to the transmission transceiver for transmitting and receiving data ;
Each transmission repeater, when receiving data from the main transmission transmitter / receiver, repeatedly transmits data to the main transmission line and the intersystem transmission line opposite to the reception port, causes all transmission apparatuses to receive the same data, and
Each of the transmission repeaters, when receiving the same type of data from the main transmission line and the inter-system transmission line, repeats transmission with priority on the first-arrival data . Each transmission relay, when receiving the same type of data from the trunk transmission lines and inter-system transmission path, computes a check code of the data frame end portion, characterized that you repeat transmitting the normal data of arrival The railway vehicle transmission device according to claim 1. The transmission apparatus for railway vehicles according to claim 1, wherein a dedicated packet for transmission right is caused to flow between the main transmission repeaters . When an abnormality occurs in the main transmission repeater or the transmission path, a dedicated packet for transmission right is made to flow through the secondary transmission repeater to construct a network that avoids data collision. The railway vehicle transmission device according to claim 3 .