DE102004030561B4 - Transmission device for rail vehicles - Google Patents

Abstract

Transmission device for rail vehicles, with:
a primary repeater (21a-21n) and a secondary repeater (21a'-21n ') installed in each rail vehicle car and each configured to receive data transmitted from another repeater (21a-21n; 21a'-21n') and to repeat received data to another repeater (21a-21n; 21a'-21n ');
a primary trunk line (23a-23n) for interconnecting the primary repeaters (21a-21n);
a secondary trunk line (23a'-23n ') for connecting the secondary repeaters (21a'-21n') together;
a trunk trunk line (23a '' - 23n '') for connecting the primary and secondary repeaters (21a-21n; 21a'-21n ') to each other in each rail vehicle car;
a trunk transceiver (24a, 24b) installed in each repeater (21a-21n; 21a'-21n ') and configured to send data to and from another repeater (21a-21n; 21a'-21n'); ) to transmit and receive in another rail vehicle car;
a trunk trunk transceiver (24c) installed in each repeater (21a-21n; 21a'-21n ') and configured to send data to and from the other repeater (21a-21n; 21a'-21n'); ) by doing...

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application is based on and claims the priority of the older ones Japanese Patent Application No. 2003-183275 and no. 2004-128707 ,

BACKGROUND OF THE INVENTION

1. Field of the invention

The The invention relates to a transmission device for rail vehicle cars.

2. Description of the Related Art

Networks using CSMA / CD (Carrier Sense Multiple Access with Collision Detection) typically adopt IEEE802.3 compliant Ethernet (registered trademark), such as 10Base-T, 100Base-TX, and 1000Base-T with twisted pairs and 10Base-T. F, 100Base-FX, 1000Base-LX and 1000Base-SX with optical cables. Each of these CSMA / CD networks is applicable to rail vehicles having a bus of transmission lines, as in 1 shown. IEEE802.3 based repeaters are limited to handling up to four levels at 10 Mbps and up to two levels at 100 Mbps. That is, a maximum of only four cars are allowed, even when accessed at a low speed of 10 Mbps, and therefore the Ethernet, which is the most widely used network, is not applicable to a long train of rail car cars.

Of the CSMA / CD basically allows a data collision and transmits the data again if a data collision occurs. That's why the CSMA / CD hardly applicable to transmit train control information, which does not allow transmission delay. For the transfer such control information is necessary, for example a To use Token Ring network that is slow and costly.

In this way, the Ethernet, which is an IEEE802.3 based network and is most widely used today, is not reliably applicable to a long train of rail vehicle cars. US 6249512 B1 discloses a data transfer system having a plurality of repeaters and two parallel data lines each connecting one half of the repeaters. According to this system, switches are provided in each repeater to connect one line at a time. In the event that one of the repeaters fails, the system is reconfigured by operating the switches so that this repeater can be bypassed via the second line. This switching leads to a certain switching delay.

JP 2000115244 A discloses a higher method and apparatus for data communication that enables continuous data communication to be maintained over a plurality of routes. For this data is divided into packages. These packets are multiplied and transmitted over the different routes. On the receiver side, one of the data packets is selected as an effective data packet and the other packets are discarded.

SUMMARY OF THE INVENTION

A The object of the invention is a transmission device for rail vehicles capable of providing on a long train of rail vehicle cars reliably applied to become. According to the invention, the above said task by a transmission device for rail vehicle cars solved according to claim 1. The dependent ones claims refer to further advantageous aspects of the invention.

The transmission device for Rail car according to a the aspects of the invention is to a long train of rail vehicle cars reliable applicable.

BRIEF DESCRIPTION OF THE DRAWINGS

1 Fig. 10 is a block diagram showing repeaters and transmission lines of a railway vehicle transfer apparatus according to a first embodiment of the invention.

2 Fig. 10 is a block diagram showing a configuration of the repeater according to the first embodiment;

3 1 is an explanatory view showing the flows of control packets according to the first embodiment. shows;

4 Fig. 10 is an explanatory view 2 showing flows of control packets according to the first embodiment;

5 Fig. 10 is an explanatory view 3 showing flows of control packets according to the first embodiment;

6 Fig. 10 is an explanatory view 4 showing flows of control packets according to the first embodiment;

7 is an explanatory view 5, the Shows flows of control packets according to the first embodiment;

8th Fig. 10 is an explanatory view 6 showing flows of control packets according to the first embodiment;

9 Fig. 10 is an explanatory view 7 showing flows of control packets according to the first embodiment;

10 Fig. 12 is an explanatory view showing transmission control operations performed at stations according to the first embodiment;

11 Fig. 12 is an explanatory view 2 showing transmission control operations performed at stations according to the first embodiment;

12 Fig. 10 is an explanatory view 3 showing transmission control operations performed at stations according to the first embodiment;

13 Fig. 10 is an explanatory view 4 showing transmission control operations performed at stations according to the first embodiment;

14 Fig. 10 is an explanatory view 5 showing transmission control operations performed at stations according to the first embodiment;

15 Fig. 10 is a block diagram showing repeaters and transmission lines of a railway vehicle transfer apparatus according to a second embodiment of the invention;

16 Fig. 10 is a block diagram showing a configuration of the repeater according to the second embodiment;

17 Fig. 12 is an explanatory view 1 of a data transfer controller according to the second embodiment;

18 Fig. 10 is an explanatory view 2 showing the data transfer control according to the second embodiment;

19 Fig. 10 is an explanatory view showing the data transfer control according to the second embodiment;

20 Fig. 4 is an explanatory view 4 showing the data transfer control according to the second embodiment;

21 Fig. 10 is an explanatory view 5 showing the data transfer control according to the second embodiment;

22 Fig. 10 is an explanatory view showing the data transfer control according to the second embodiment;

23 Fig. 10 is an explanatory view showing the data transfer control according to the second embodiment;

24 Fig. 10 is a timing chart showing the data transfer control according to the second embodiment;

25 Fig. 10 is a timing chart showing the data transfer control (temporarily holding a transmission right) according to the second embodiment;

26 Fig. 11 is an explanatory view showing a second example of the data transfer control according to the second embodiment;

27 Fig. 2 is an explanatory view showing the second example of the data transfer control according to the second embodiment;

28 Fig. 3 is an explanatory view showing the second example of the data transmission according to the second embodiment;

29 Fig. 4 is an explanatory view showing the second example of the data transfer control according to the second embodiment;

30 Fig. 4 is an explanatory view showing the second example of the data transfer control according to the second embodiment;

31 Fig. 12 is an explanatory view showing the second example of the data transfer control according to the second embodiment;

32 Fig. 10 is a timing chart showing the second example of the data transfer control according to the second embodiment;

33 Fig. 10 is a block diagram showing repeaters and transmission lines of a railway vehicle transfer apparatus according to a third embodiment of the invention;

34 Fig. 10 is a block diagram showing a configuration of the repeater according to the third embodiment;

35 FIG. 16 is a block diagram showing a configuration of the transmission line according to the third embodiment. FIG Embodiment shows;

36 Fig. 11 is an explanatory view showing the data transfer control according to the third embodiment;

37 Fig. 4 is an explanatory view showing the data transfer control according to the third embodiment;

38 Fig. 3 is an explanatory view showing the data transfer control according to the third embodiment;

39 Fig. 10 is an explanatory view 4 showing the data transfer control according to the third embodiment;

40 Fig. 11 is an explanatory view showing a second example of the data transfer control according to the third embodiment;

41 Fig. 2 is an explanatory view showing the second example of the data transfer control according to the third embodiment;

42 Fig. 3 is an explanatory view showing the second example of the data transfer control according to the third embodiment;

43 Fig. 4 is an explanatory view showing the second example of the data transfer control according to the third embodiment;

44 Fig. 5 is an explanatory view showing the second example of the data transfer control according to the third embodiment;

45 Fig. 10 is an explanatory view showing the second example of the data transfer control according to the third embodiment;

46 Fig. 11 is an explanatory view showing the second example of the data transfer control according to the third embodiment;

47 Fig. 10 is a block diagram showing repeaters with transmission lines of a railway vehicle transfer apparatus according to a fourth embodiment of the invention;

48 Fig. 10 is a block diagram showing a configuration of the repeater according to the fourth embodiment;

49 Fig. 11 is an explanatory view showing the data transfer control according to the fourth embodiment;

50 Fig. 10 is an explanatory view 2 showing the data transfer control according to the fourth embodiment;

51 Fig. 3 is an explanatory view showing the data transfer control according to the fourth embodiment;

52 Fig. 4 is an explanatory view showing the data transfer control according to the fourth embodiment;

53 Fig. 11 is an explanatory view showing a second example of the data transfer control according to the fourth embodiment;

54 Fig. 4 is an explanatory view showing the second example of the data transfer control according to the fourth embodiment;

55 Fig. 11 is an explanatory view showing a third example of the data transfer control according to the fourth embodiment;

56 Fig. 4 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

57 Fig. 3 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

58 Fig. 4 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

59 Fig. 4 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

60 Fig. 10 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

61 Fig. 11 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

62 Fig. 10 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

63 Fig. 9 is an explanatory view showing the third example of the data transfer control according to the fourth embodiment;

64 Fig. 10 is a block diagram showing repeaters and transmission lines of a railway vehicle transfer apparatus according to a fifth embodiment of the invention;

65 Fig. 10 is a block diagram showing a configuration of the repeater according to the fifth embodiment;

66 Fig. 10 is an explanatory view showing the data transfer control according to the fifth embodiment;

67 Fig. 10 is an explanatory view 2 showing the data transfer control according to the fifth embodiment;

68 Fig. 10 is an explanatory view showing the data transfer control according to the fifth embodiment;

69 Fig. 4 is an explanatory view showing the data transfer control according to the fifth embodiment;

70 Fig. 10 is an explanatory view showing the data transfer control according to the fifth embodiment;

71 Fig. 10 is an explanatory view showing the data transfer control according to the fifth embodiment;

72 Fig. 10 is a timing chart 1 showing the data transfer control according to the fifth embodiment;

73 FIG. 10 is a timing chart 2 showing the data transfer control according to the fifth embodiment. FIG.

DETAILED DESCRIPTION OF EMBODIMENTS

Various embodiments The invention will be described with reference to the accompanying drawings described.

First Embodiment

1 shows a configuration of transmission lines in a transmission device for rail vehicles according to the first embodiment of the invention, and 2 Fig. 10 shows a structure of a repeater accommodated in the transmission device.

According to the first embodiment, the rail vehicle carriage transmission apparatus comprises a plurality of repeaters 1a up to, which are each installed in the car. Each repeater includes three (two if no data is transmitted to or received from a station) or multiple transceiver ports 4a . 4b and 4c , a repeater controller 2 to control repeating data between the ports and an exclusive packet circulated through the repeaters, and a plurality of stations 5 to transmit and receive data within the cart. The repeaters 1a to be in communication with each other via a transmission line bus 3a to 3 (n-1) connected.

In each car are the stations 5 within the repeater 1 or outside the repeater 1 arranged. Even if the stations 5 outside the repeater 1 are arranged, are the transmitter-receiver ports 4a . 4b and 4c within the repeater 1 arranged. In 2 is the station 5a within the repeater 1 and the station 5b outside the repeater 1 , The repeater 1 may have a plurality of stations and a plurality of stations 5 connected transceiver ports 4 exhibit.

The transmission line 3a to 3 (n-1) may be made of twisted wire pairs of, for example, 10Base-T or 100Base-T or optical fiber cables of, for example, 10Base-F or 100Base-Fx.

Although the first embodiment is the transmission lines connected in a bus 3a to 3 (n-1) used, it is possible to use in a loop connected to a control technique transmission lines, which in the unchecked Japanese Patent Application Publication No. 2004-96159 are disclosed to increase redundancy.

The operation of the railway vehicle transfer apparatus according to the first embodiment will be explained. 3 to 9 show flows of exclusive packages through the repeaters 1a to 1e , and 10 and 14 show a transmission control at the stations 5 in the repeater 1 is performed.

The first embodiment is carried out in conjunction with a train of five cars, ie n = e. The car 1 is with the repeater 1a equipped by the transmission line 3a with the repeater installed in the car 2 1b connected is. The cars 2 to 5 are each with the repeaters 1b to 1e equipped with each other via the arranged in a bus configuration transmission lines 3b to 3d are connected.

Initially, the repeaters determine 1a to 1e each one link pulse network structure of the IEEE802.3. According to the first embodiment, the repeaters 1a to 1e connected in a bus configuration to form a network. This embodiment assumes that the repeater 1a at an upstream end of the network, and the repeater 1e at a downstream end of the Network is. The definitions of upstream and downstream are reversible. The repeater 1a is the most upstream repeater and serves as a parent repeater. The repeater 1e is the most downstream repeater, and the repeater 1b to 1d are intermediate repeaters.

The operation of the network with the above-mentioned arrangement will be described with reference to FIG 3 to 9 explained.

(1) Initialization

In 3 The most upstream repeater sends a reset packet to the transmission line as a signal to start transmission control 3a , Upon receipt of the reset packet, each of the repeaters recognizes 1b to 1e in that it has no transmission right, suppresses data transmission and repeats the downstream side reset packet.

If the reset package is the most downstream repeater 1e reached, is the most upstream repeater 1a the only repeater with transmission rights.

(2) Data transmission ( 1a )

In 4 transmits the most upstream repeater 1a with the transmission right from a station 5 sent DATA1 in the repeater 1a available. Each of the repeaters 1b to 1e who have no transmission right repeats the DATA1 for the downstream side as well as for stations 5 that are present in the repeater. As a result, all stations receive the DATA1 substantially simultaneously.

(3) Transmission Rights Transfer ( 1a to 1b )

In 5 At the end of the transmission of DATA1, the repeater transfers the transmission right with a token packet to the downstream side. Then the repeater changes 1a into a state without transmission rights. The repeater 1b receives the token packet and retains the transmission right without repeating the token packet for the downstream side.

(4) Data transmission ( 1b )

In 6 transmits the repeater 1b who has received the transmission right from a station 5 sent DATA2 in the repeater 1b is available. The repeaters 1a and 1c to 1e who have no transmission right, repeat the DATA2 for the next repeater as well as for the stations 5 that are present in every repeater.

(5) Transmission Rights Transfer ( 1d to 1e )

In 7 the transmission right transfer and the data transfer to the downstream side are repeated. The repeater 1d transmits a token packet to the most downstream repeater 1e so the repeater 1e the transmission right can have.

(6) Data transmission ( 1e )

In 8th transmits the most downstream repeater 1e who has received the transmission right, DATA3 from a station 5 in the repeater 1e is available.

(7) Reset

In 9 transmits at the end of the data transmission of the repeater 1e a return package to the upstream side, as the repeater 1e the furthest downstream repeater. The return packet indicates that the transmission right has been circulated. Then the repeater changes 1e in a no-transfer right state. The intermediate repeaters 1d to 1e repeat step by step the return packet for the upstream side. Upon receipt of the return packet, the most upstream repeater will detect 1e in that the transmission right has been circulated and starts the transmission right control again from the step (1).

When the most upstream repeater 1a is unable to receive the return packet within a predetermined time, it is determined that a difficulty has occurred in the network, and the initialization step (1) is started to continue a transmission right circulation without interruption.

Each of the repeaters 1a to 1e includes a circulation time watchdog timer. If any of the repeaters one from a station 5 has large amount of data to be transferred present in the repeater, and if it is determined that the transmission right is not circulated within the predetermined time due to the large transmission data, that becomes the stations 5 the transmission right given in the repeater is restricted according to the predetermined priorities so as to comply with the transmission right circulation time. This technique can ensure a circulation time of significant data, such as train control data, which must be transmitted in real time.

A technique for restricting data transmission from the stations 5 in each repeater is related to 10 and 14 explained.

(1) Transmission restriction

In 10 transmits when a given repeater 1 has no transmission right, the repeater controller 2 in the repeater 1 continuously specify a PAUSE_A packet (specified in IEEE802.3, where "A" indicates a transmission restriction time) for restricting the transmission to the stations 5a to 5d in the repeater 1 available. A transmission interval of the PAUSE_A packet is set to be shorter than the pause time "A".

(2) releasing the transmission from the station 5a

If the repeater 1 in 11 a transmission right, he allows, for example, the station 5a to transfer even data. Then the repeater controller transmits 2 in the repeater 1 a PAUSE_B packet (time B = 0) to enable the transmission) to the station 5a , When the PAUSE_B packet is received, the station changes 5a in a transmission enable state. The other stations 5a to 5d in the repeater 1 do not receive a PAUSE_B packet and thus maintain the transmit lock state with the PAUSE_A packet.

(3) Data transfer from station 5a

In 12 transmits the transmission release station 5a DATA1. The repeater controller 2 repeats the DATA1 from the station 5 for the other stations 5b to 5d as well as for the upstream and downstream repeaters. When the transmission enabling station has no data to be transmitted, no transmission is carried out, and the next step (4) is executed after a predetermined time.

(4) Lock the transmission from the station 5a

In 13 transmits after receiving the DATA1 from the station 5a the repeater controller 2 a PAUSE_A packet to the station 5a , reducing the transmission of the station 5a is locked. Then the stations 5a to 5d in a transmission lock state.

(5) Release the transmission from the station 5b

In 14 transmits the repeater controller 2 a PAUSE_B packet to the station 5b to the transfer from the station 5b release. When the PAUSE_B packet is received, the station changes 5b in a transmission enable state.

The repeater controller 2 gives the transmission from the stations 5a to 5d one at a time to avoid data collision in the CSMA / CD network. The repeater controller 2 can change the number of transmission packets sent to the stations 5a to 5d are assigned to maintain a real-time operation.

As mentioned above, the rail vehicle transfer device according to the first embodiment connects transmission lines 3 in a bus configuration and transmits an exclusive packet through the transmission lines 3 and a plurality of repeaters 1 to avoid a collision. According to the exclusive package, each of the repeaters controls 1 in the right way the ports to repeat data. This configuration can avoid data collision in a CSMA / CD network, eliminate a limitation on the number of connectable stages, and repeat data with a small delay. The Exclusive package is used to transfer a right of a repeater 1 to transfer to another. The repeater controllers 2 circulate the exclusive package through the repeater 1 from the upstream side to the downstream side. That is, the transmission right is controlled to pass through all the repeaters 1 to be circulated within a predetermined time.

According to the first embodiment, each of the repeaters includes 1 a plurality of stations 5 , If a given repeater 1 receives a transmission right, gives the repeater controller 2 of the given repeater 1 the transmission right to the stations 5 one after the other to avoid data collision and repeat data at high speed. The repeater controller 2 Monitors a time to the transmission right within the repeater 1 to circulate. When a predetermined time elapses, the repeater controller stops 2 circulating the transmission right through the station 5 with the exception of one special station and transfers the transmission right to the next downstream repeater 1 , This technique allows the transmission right quickly to downstream repeaters 1 transmit and maintain a transmission right circulation interval.

The first embodiment restricts the transmission from the stations 5a to 5d according to the flow control specified in IEEE802.3x. When a half duplex circuit is used, a back pressure can be applied continuously to restrict the transmission.

Second Embodiment

A railway vehicle transfer apparatus according to the second embodiment of the invention will be explained. As in 15 As shown, the transmission apparatus according to the second embodiment includes repeaters 11a to 11n and transmission lines 13a to 13 (n-1) to connect the repeaters together. The transmission lines are arranged in a bus configuration. Each of the repeaters 11a to 11n includes trunk transceivers, station transceivers, stations to transmit and receive data within the repeater, and a repeater controller to control data repetition between the transceivers and an exclusive packet to control a transceiver Network to form. The repeaters use an advanced type of transmission right circulation and control technique of the first embodiment to avoid collisions and improve the circulation regularity.

15 shows an arrangement of the transmission lines for the transmission device for rail vehicles according to the second embodiment. 16 shows a structure of a repeater of the transmission device. Each of the repeaters 11a to 11n according to the second embodiment comprises two or more trunk transceiver ports 14a and 14b , one (zero if the repeater is not transmitting or receiving data within the carriage in which the repeater is installed) or multiple station transceiver ports 15a and 15b , the repeater controller 12 to control data repetition between the ports, as well as an exclusive packet (token packet) routed through the repeaters and the stations 16a and 16b to transmit and receive data within the repeater.

The stations 16a and 16b can be within the repeater 11 or outside the repeater 11 be arranged. If the stations outside the repeater 11 are arranged, the stations are transmitter-receiver 15 within the repeater 11 arranged. In 16 is the station 16a within the repeater 11 and the station 16b outside the repeater 11 arranged. Each repeater may use a plurality of stations and station-transceivers attached to the stations.

According to the second embodiment, the repeaters 11a to 11n together with the trunk transmission lines 13a to 13 (n-1) connected, which are arranged in a bus configuration.

The operation of the rail vehicle car transmission apparatus according to the second embodiment will be described with reference to FIG 17 to 24 explained. The following explanation is based on a train of six cars (ie, n = f).

(1) Reset

In 17 it is assumed that the repeater 11a at an upstream end of the network and the repeaters 11f is at a downstream end. The definitions of upstream and downstream are reversible. Within an effective area of the network is the most upstream repeater 11a as a tribal repeater.

The repeater 11a outputs a reset packet as an indication to start a transmission right circulation. When the reset packet is received, each of the repeaters performs 11b to 11f initializes and prepares itself for data reception. Each of the repeaters 11a to 11f clears an internal timer when the reset packet is transmitted or (received). The repeater 11a transmits data, if any, and transfers the transmission right to the nearest downstream repeater.

(2) Transmission Rights Transfer (from 11a to 11b )

In 18a gives after transferring necessary data of the repeater 11a a token packet to transfer the transmission right to the next repeater. The repeater 11b receives the token packet from the repeater 11a and secures the transmission right. The repeater 11b with the transmission right transmits data, if any, and gives a token packet to the downstream repeater 11c out. In this way, the transmission right is circulated.

During data transmission from the repeater 11c It is assumed that a time "ta" has elapsed after the reset packet was output (t = 0). Each repeater has started its own timer in the transmission (reception) of the reset packet, and therefore, the repeaters essentially recognize at the same time that the time ta has expired.

(3) Transmission Rights Transfer (from 11c to 11d )

In 19 when the expiration of time ta is detected, the repeater transfers 11c , right after the end of the present data transmission, the transmission right to the downstream repeater 11d with a token package.

(4) Through ( 11d )

In 20 the repeater receives 11d the token packet from the repeater 11c , At this time, the time ta has already expired, and therefore transmits the repeater 11d no data from the stations of the repeater 11d and immediately transfers the transmission right to the downstream repeater with a token packet.

(5) Through ( 11e )

In 21 the repeater receives 11e the token packet from the repeater 11d , At this time, the time ta has already expired, and therefore transmits the repeater 11e no data from the stations of the repeater 11e and immediately transfers the transmission right to the downstream repeater 11f with a token package.

(6) Control instruction transmission ( 11f )

In 22 is the repeater 11f a repeater to transmit a control instruction, and therefore transmits a control instruction DATA1 when the token packet from the repeater 11e Will be received. The control statement DATA1 is executed by the repeaters 11e to 11a repeated.

According to this embodiment, the repeater is used 11f as a control instruction transmission node. If the repeater 11f is not the control command transmission node, the repeater transmits 11f not the DATA1, and the next step will be executed.

(7) return

In 23 gives the repeater 11f after transferring the control instruction, a reset packet. The reset package is provided by the repeaters 11e to 11a passed, and the circulated transmission right is sent to the repeater 11a returned.

Through the above steps and as in a timing diagram of 24 2, the transmission right is circulated within a target time, and a control command is transmitted to the repeaters within a predetermined time.

at the next Circulation can the repeaters that transmit data at the previous circulation have, be run through, and the repeater, the previous one Through circulation, can receive the transmission right, to balance the load between the repeaters and the transmission intervals to maintain the tax instructions.

Instead of of the reset package For example, a control statement may be used as a time reference. In this case, a service type contained in an IP header becomes used to be the priority increase the tax instruction data and the priority of to lower other data. Instead of the IP header, a data field can be used become the priority define.

An operation of temporarily holding a transmission right at a repeater transmitting a control instruction so that the control instruction is transmitted at predetermined intervals will be described with reference to FIG 25 explained. In this explanation, the repeater is used 11a as a repeater to transmit a control instruction.

The repeater 11a , which serves as a repeater to transmit a control instruction, clears a timer when a control instruction is transmitted. The repeaters 11b to 11f a transmission right is circulating in succession, and only the repeater having the transmission right can transmit data.

If the repeater 11a the transmission right receives after a time "ta" (which is set to be shorter than a target control command transmission interval), the repeater determines 11a in that the transmission interval will not be met if the transmission right is circulated once more, and stops the circulation of the transmission right until the target control instruction transmission interval expires. When the timing of transmission of a control instruction comes, the repeater keeps 11a the transmission right and is ready to transmit a control instruction, and thus transmits the repeater 11a immediately the control instruction to the repeater 11b to 11f ,

When the transmission direction is reversed to the repeater 11f to make the control command transmission repeater, the repeater keeps 11f the transmission right and prepares itself to issue a tax instruction.

On keeps this way one to transfer a control instruction instructed repeater temporarily a transmission right and transmits one Control instruction at predetermined intervals.

Next, an operation for temporarily stopping a transmission right and transmitting a control instruction at predetermined intervals without returning the transmission right to the upstream repeater with reference to FIG 26 to 32 described. In the following explanation, the trunk transmitter-receivers perform 14a and 14b in each repeater a full-duplex communication through. The number of lines involved in full duplex communication may be four or two. By using an echo sounder, full-duplex communication with two lines is achievable. The repeater 11a serves as a control instruction transmission repeater, and a reset packet is used as a time reference.

(1) transmission from the repeater 11d

In 26 Let's assume that the repeater 11d has a transmission right and a time limit "ta" during data transmission from the repeater 11d has expired.

(2) Time-Out (Transmitting a temporary stop packet)

In 27 transmits when the time limit ta (control instruction transmission interval - maximum time a packet) expires, the repeater 11a who must transmit a control instruction, a stop packet for suspending the transmission right to the repeater 11d who currently holds the transfer right. DATA1 from the repeater 11d are repeated through an upstream path, and thus do not collide with that of the repeater 11a issued stop package. Even if the repeater 11a When the repeater is used to transmit a control instruction, the stop packet will not match the data from the repeater 11d colliding due to different paths When the stop packet is received, the repeater suspends 11d the transmission right after completing a currently transmitted packet. Then no data will flow through the network because the other repeaters have no transmission right.

(3) sending the control instruction ( 11a )

In 28 confirmed the repeater 11a in that the network is free, and transmits a control instruction DATA2 at a predetermined transmission interval. The other repeaters 11b to 11f essentially receive the DATA2 at the same time.

(4) Recovery

In 29 gives the repeater 11a after the end of transmission of the control instruction DATA2, a release packet for resuming the transmission right circulation to the downstream side. The release packet is effective only for the repeater holding the transmission right, and the repeaters that do not have a transmission right repeat the release packet. When the release package is received, the repeater returns 11d which holds the transmission right, returns from the transmission rights reservation state to a transmission protection state.

(5) Transfer data from the repeater 11d

In 30 transmits, after returning to the transmission security state, the repeater 11d the DATA3. If the repeater 11d has no data to be transmitted, the next step is performed.

(6) Transmission Rights Transfer

In 31 gives the repeater 11d after transmitting the DATA3, a token packet is issued to the transmission right to the repeater 11e to transfer.

As explained above and in 32 4, the transmission right is temporarily suspended, and a control instruction is transmitted at regular intervals without once returning the transmission right to the most upstream repeater.

According to the second embodiment must the repeater, for a stop packet is sent after transmitting from present Data in a transmission right suspend state walk. Instead, the current data transmission at the reception of a stop packet to stop the transmission right suspending state to start. In this case, the limit time "ta" may be brought closer to the transmission interval than "transmission interval repetition time" become. The data, their transmission has ended transmitted again after resumption of the transmission right become.

Third Embodiment

A transmission device for rail vehicle cars according to the third Embodiment of Invention will be explained. The third embodiment uses primary and secondary Trunk lines to repeaters installed in the car with each other and a trunk trunk line located in each car, around the primary and secondary Trunk lines in the car to connect. The primary, secondary and trunk trunk lines form a ladder-like transmission line network, where the primary and secondary Trunk lines are horizontal and the trunk trunk lines are vertical extend. These transmission lines are used by the repeaters to get data from a repeater to repeat another. Each repeater carries a transmission control by the transmission right circulation control the first embodiment was extended to avoid collisions and data with little delay to repeat.

33 shows the transmission lines of the transmission device for rail vehicles according to the third embodiment, and 34 shows a structure of a repeater of the transmission device. The repeaters include primary repeaters 21a to 21n and secondary repeaters 21a ' to 21n ' , Each of these repeaters includes two trunk transmitter-receiver ports 24a and 24b , one Port of a trunk-trunk-transceiver 24c , one (zero if the repeater is not transmitting data or receiving within the car in which the repeater is installed) or multiple station transceiver ports 25a and 25b , a repeater controller 22 to control the data repetition between the ports, as well as an exclusive packet (token packet) transmitted by the repeaters and a plurality of stations 26a and 26b to transmit and receive data in the cart. In each car, the stations can 26a and 26b be located within the repeater or outside the repeater. When the station 26 outside the repeater is as in 34 shown is the station transceiver 25 installed inside the repeater. As in 34 As shown, a plurality of stations and station transceivers mounted on the stations may be arranged.

According to the transmission apparatus of the third embodiment, the primary repeaters 21a to 21n with each other with the primary trunk lines 23a to 23 (n-1) and the secondary repeaters 21a ' to 21n ' with each other with the secondary trunk lines 23a ' to 23 (n-1) ' connected. The primary repeaters 21a to 21n are each with the secondary repeaters 21a ' to 21n ' with the trunk-trunk lines 23a '' to 23n '' connected. This configuration as a whole constitutes the ladder-like transmission line network.

The operation of the third embodiment having the above-mentioned configuration will be described with reference to FIG 35 to 46 explained. 35 to 39 show data flows according to the third embodiment, and 40 and 42 show exclusive packet flows according to the third embodiment. The following explanation is based on a train of six cars, ie n = f.

First, data flows according to the third embodiment will be described with reference to FIG 35 to 39 explained.

A transmission line configuration will be explained. In 35 Car 1 contains the primary repeater 21a and the secondary repeater 21a ' that with the primary repeater 21b and the secondary repeater 21b ' of the carriage 2 each with the primary trunk line 23a and the secondary trunk line 23a ' are connected. The primary repeater 21a and the secondary repeater 21a ' are together with the trunk trunk line 23a '' connected. The cars 2 to 6 each contain the repeaters 21b and 21b ' to 21f to 21f ' , These repeaters are in a ladder-like configuration with the trunk lines together 23b and 23b ' to 23e and 23e ' and the trunk-trunk lines 23a '' to 23f '' connected.

These embodiments assume that the repeater 21a at an upstream end of the network and the repeaters 21f is at a downstream end. The definitions of upstream and downstream are reversible. Within an effective area of the network is the most upstream repeater 21a as a tribal repeater. The primary repeaters 21a to 21f be compared to the secondary repeaters 21a ' to 21f ' Priority given. If the primary repeater 21a for example, works normally, serves the primary repeater 21a as a parent repeater, and if the primary repeater 21a abnormal, the secondary repeater serves 21a ' as a tribal repeater.

(1) Data flow in the normal state (data transfer from 21a )

In 36 the network is working normally and the primary repeater 21a has a transfer right. The primary repeater 21a simultaneously transfers DATA1 to the downstream primary repeater 21b through the primary trunk line 23a and to the secondary repeater 21a ' through the trunk-trunk line 23a '' , Basically, each repeater repeats received data to all ports (a primary or secondary trunk line and stations) with the exception of the port that received the data. This causes each repeater to receive the DATA1 from the trunk line as well as from the trunk-trunk line to have multiple pieces of DATA1. To avoid this, when the same data is received from the trunk line and the trunk trunk line, each repeater gives priority to the data received first and performs a retry operation on the data first received.

The Determining if received data is the same as the previously received one or not, can according to one Identifier (usually um One incremented whenever an IP packet is transmitted), which is in one IP header is determined. The third embodiment uses this technique. Instead, it is possible to embedding a technique a sequentially updated number in a data frame.

The operation of each repeater is explained. The primary repeater 21a transfers the DATA1 to the primary 21b and the secondary repeater 21a ' ,

The secondary repeater 21a ' receives the DATA1 through the trunk trunk line 23a '' and repeats the DATA1 for the downstream secondary repeater 21b ' ,

The primary repeater 21b receives the DATA1 through the primary trunk line 23a and repeats the DATA1 for the downstream primary repeater 21c through the primary trunk line 23b and for the secondary repeater 21b through the trunk-trunk line 23b '' ,

The secondary repeater 21b ' receives the DATA1 from the upstream secondary repeater 21a ' through the secondary trunk line 23a ' and from the primary repeater 21b through the trunk-trunk line 23b '' , selects the first received DATA1 and repeats the DATA1 for the downstream secondary repeater 21c ' ,

Here's the secondary repeater 21b ' the DATA1 from the trunk trunk line 23b '' and thus never transmits the DATA1 to the trunk trunk line 23b '' , Alternatively, the secondary repeater 21b ' the DATA1 to the trunk trunk line 23b ' transmitted, and the primary repeater 21b may be the trunk trunk trunk 23b '' discard received DATA1.

The primary repeater 21c receives the DATA1 through the primary trunk line 23b and repeats the DATA1 for the downstream repeater 21d through the primary trunk line 23c and for the secondary repeater 21c ' through the trunk-trunk line 23c '' ,

The secondary repeater 21c ' receives the DATA1 from the secondary trunk line 23b ' and from the primary repeater 21c through the trunk-trunk line 23c '' , selects the first received DATA1 and repeats the DATA1 for the downstream repeater 21d ' ,

These operations are repeated until all repeaters have received the DATA1.

(2) data flow when the primary repeater 21c is not ok (data transfer from 21a )

A data flow if the primary repeater 21c is denied, with respect to 37 explained.

The primary repeater 21a transfers DATA1 to the primary repeater 21b and the secondary repeater 21a ' ,

The secondary repeater 21a ' receives the DATA1 from the trunk trunk line 23a '' and repeats the DATA1 for the downstream secondary repeater 21b ' ,

The primary repeater 21b receives the DATA1 from the primary trunk line 23a and repeats the DATA1 for the downstream primary repeater 21c through the primary trunk line 23b and for the secondary repeater 21b ' through the trunk-trunk line 23b '' ,

The secondary repeater 21b ' receives the DATA1 from the downstream secondary repeater 21a ' through the secondary trunk line 23a ' and from the trunk-trunk line 23b '' , accepts the first received DATA1 and repeats the DATA1 for the downstream secondary repeater 21c ' ,

Here's the secondary repeater 21b ' the DATA1 from the trunk trunk line 23b '' thus never receives and transmits the DATA1 to the trunk trunk line 23b '' , Instead, the secondary repeater 21b ' the DATA1 to the trunk trunk line 23b '' transmitted, and the primary repeater 21b may be the trunk trunk trunk 23b discard received DATA1.

The primary repeater 21c is out of order and therefore unable to receive or transmit data.

The secondary repeater 21c ' receives the DATA1 from the secondary data line 23b ' and repeats the DATA1 for the secondary repeater 21d ' and the primary repeater 21c because there is no data from the trunk trunk line 23c '' come.

The primary repeater 21d does not receive data from the failed primary repeater 21c , receives the DATA1 from the secondary repeater 21d ' and repeats the DATA1 for the downstream side.

The secondary repeater 21d ' receives the DATA1 from the secondary trunk line 23c ' and repeats the DATA1 for the secondary repeater 21e ' and the primary repeater 21d because there is no data from the trunk trunk line 23d '' come.

In this way, all repeaters receive the DATA1, even if the primary repeater 21c is out of order.

(3) Data flow in the normal state (data transfer from 21c )

Operation with the primary repeater 21c who has a transfer right is referring to 38 explained.

The primary repeater 21c transfers the DATA2 to the upstream primary repeater 21b , the downstream primary repeater 21d and the secondary repeater 21c ' ,

The secondary repeater 21c ' receive the DATA2 from the primary repeater 21c and repeats the DATA2 for the downstream secondary repeater 21d ' and the upstream secondary repeater 21b ' ,

The primary repeater 21d receives the DATA2 from the upstream primary repeater 21c and repeats the DATA2 for the downstream primary repeater 21e and the secondary repeater 21d ' ,

The secondary repeater 21d ' receives the DATA2 from the downstream secondary repeater 21c ' and from the primary repeater 21d , selects the first received DATA2 and repeats the DATA2 for the downstream secondary repeater 21e ' ,

The primary repeater 21b receives the DATA2 from the downstream primary repeater 21c and repeats the DATA2 for the downstream primary repeater 21a and the secondary repeater 21b ' ,

The secondary repeater 21b ' receives the DATA2 from the downstream secondary repeater 21c ' and from the primary repeater 21b , accepts the first received DATA2 and repeats the DATA2 for the upstream secondary repeater 21a ' ,

The primary repeater 21a receives the DATA2 from the downstream primary repeater 21b and repeats the DATA2 for the secondary repeater 21a ' ,

The secondary repeater 21a ' receives the DATA2 from the downstream secondary repeater 21b ' and from the primary repeater 21a and takes the first received DATA2.

These operations are repeated until all repeaters receive the DATA2.

(4) Data flow when the primary repeater 21b is not ok (data transfer from 21c )

A data flow if the primary repeater 21b is faulty, with reference to 39 explained.

The primary repeater 21c transfers DATA2 to the upstream primary repeater 21b , the downstream primary repeater 21d and the secondary repeater 21c ' ,

The secondary repeater 21c ' receives the DATA2 from the primary repeater 21c and repeats the DATA2 for the downstream secondary repeater 21d ' and the upstream secondary repeater 21b ' ,

The primary repeater 21d receives the DATA2 from the upstream primary repeater 21c and repeats the DATA2 for the downstream primary repeater 21e and the secondary repeater 21d ' ,

The secondary repeater 21d ' receives the DATA2 from the upstream secondary repeater 21c ' and from the primary repeater 21d , accepts the first received DATA2 and repeats the DATA2 for the downstream secondary repeater 21e ' ,

The primary repeater 21b is out of order and therefore unable to receive or transmit the data.

The secondary repeater 21b ' receives the DATA2 from the downstream secondary repeater 21c ' and repeats the DATA2 for the downstream secondary repeater 21a ' and the primary repeater 21b because no data from the primary repeater 21b come.

The secondary repeater 21a ' receives the DATA2 from the downstream secondary repeater 21b ' and repeats the DATA2 for the primary repeater 21b because no data from the primary repeater 21a come.

The primary repeater 21a receives the DATA2 only from the secondary repeater 21a ' because there is no data from the downstream primary repeater 21b come out of service.

In this way, all repeaters can receive the DATA2, even if the primary repeater 21b is faulty.

Next, a flow of an exclusive packet by the repeaters according to the embodiment will be described with reference to FIG 40 to 46 explained.

(1) Reset

As in 40 shown, is the upstream primary repeater 21a a reset packet as a signal to start circulating a transmission right. Upon receipt of the reset packet, each repeater halts a currently-executing operation and enters a token-wait state. This is an initialization of the network.

Each repeater receiving the reset packet repeats the downstream side reset packet and the repeater packet in the same car if no reset packet from the Repeater comes in the same car.

The primary repeater 21a transmits the reset packet to the downstream primary repeater 21b and the secondary repeater 21a ' ,

The secondary repeater 21a ' receives the reset packet from the primary repeater 21a and transfers it to the downstream side.

The primary repeater 21b receives the reset packet from the upstream primary repeater 21a and repeats it for the downstream primary repeater 21c and the secondary repeater 21b ' ,

The secondary repeater 21b ' receives the reset packet from the upstream secondary repeater 21a ' and from the primary repeater 21b and repeat it for the downstream side. If the reset packet is not from the primary repeater 21b comes, repeats the secondary repeater 21b ' the reset packet for the primary repeater 21b ,

These operations are repeated and all repeaters receive that from the primary repeater 21a sent reset package.

(2) tokens ( 21a to 21b )

A token packet is a packet for transmitting a transmission right from one repeater to another and is routed from the upstream side to the downstream side. In the following, with reference to 41 Illustrated example becomes the transmission right of the primary repeater 21a to the primary repeater 21b transfer.

The primary repeater 21a transmits a token packet to the downstream primary repeaters 21b , The primary repeater 21b receives the token packet and returns a token ACK packet. If the primary repeater 21a receives the token ACK packet, the transfer of the transmission right is completed. In this way, the transmission right becomes the most downstream primary repeater 21f circulated.

Instead of using the token ACK packet, the primary repeater can 21a Determine if the transmission right to the primary repeater 21b has been transmitted or not, by checking whether data from the primary repeater 21b be transmitted within a predetermined time. This alternative is possible because if the transmission right to the primary repeater 21b was transferred, the primary repeater 21a Data from the primary repeater 21b within the predetermined time.

(3) tokens ( 21b out of order)

In 42 gives the primary repeater 21a a token packet to the primary repeater 21b off, and no token ACK packet is received from the primary repeater 21b returned within a predetermined time. In this case, the primary repeater determines 21a that the primary repeater 21b is out of order or that the transmission line is abnormal and selects another route for the token packet.

That is, the primary repeater 21a returns a token packet to the secondary repeater 21a ' through the trunk-trunk line 23a '' out. The secondary repeater 21a ' is secondary and thus is not allowed to keep the transmission right, even if he receives the token packet from the primary repeater 21a receives. Therefore, repeats the secondary repeater 21a ' the token packet for the downstream secondary repeater 21b ' , The secondary repeater 21b ' is also secondary, thus repeating the downstream repeater token packet received from the downstream side 21b through the trunk-trunk line 23b '' and monitors whether the token packet from the primary repeater 21b Will be received.

If a token ACK packet from the primary repeater 21b is returned, it is determined that the primary repeater 21b error free and the primary trunk line 23a is faulty, and the transmission right becomes the primary repeater 21b transferred. Ie. the transmission right is from the primary repeater 21a to the primary repeater 21b and the primary repeater 21c transferred by a route passing through the primary repeater 21a , the secondary repeater 21a ' , the secondary repeater 21b ' , the primary repeater 21b and the primary repeater 21c running.

If no token ACK packet from the primary repeater 21b is returned, the primary repeater stops 21c the transmission right and outputs a token ACK packet. The secondary repeater 21a ' repeats the token ACK packet for the primary repeater 21a to transfer the transmission right from the primary repeater 21a to the primary repeater 21c complete.

This example uses the secondary repeater 21a ' no transmission right given. It is possible to the secondary repeater 21a ' to give the transmission right. In this case, the primary and secondary repeaters transmit 21a and 21a ' in the car 1 data to the other repeaters, and thus a higher application must determine which piece of data is released. If the primary repeater 21b returns a token NAK packet in response to the token packet, the token is discarded to prevent generation of a plurality of tokens. This can be done if only the transmission line from the primary repeater 21b to the primary repeater 21a is faulty. In this case, data from the downstream side can not be received for a long time, and thus the primary repeater determines 21a that the primary repeater 21b is faulty and has to disconnect the circuit.

(4) tokens (primary system restore)

In 43 transfers the secondary repeater 21b ' who has a transmission right, data and then transfers the transmission right to the downstream side. That is, that the secondary repeater 21b ' a token packet to the downstream secondary repeater 21c ' outputs. The secondary repeater 21c ' who has received the token is secondary and thus checks whether he has the transmission right to the primary repeater 21c can return. There is the secondary repeater 21c ' a token packet to the primary repeater 21c out. If a token ACK packet from the primary repeater 21c is received, the secondary repeater transfers 21c ' the transmission right to the primary repeater 21c ,

(5) token flow ( 21b out of order)

44 summarizes the above mentioned operations. If the primary repeater 21b is out of order, a token packet flows through a route that the repeaters 21a . 21a ' . 21b ' . 21c ' . 21c . 21d . 21e and 21f passes. Among these repeaters keep the secondary repeaters 21a ' and 21c ' no transmission right to minimize network load increase.

(6) return

In 45 the token packet reaches the most downstream primary repeater 21f , After the completion of the data transmission gives the primary repeater 21f a return packet to inform that the transmission right has been circulated. Similar to the reset packet, the return packet is repeated successively for the downstream side and finally reaches the most upstream primary repeater 21a ,

(7) Return ( 21c out of order)

In 46 an intermediate repeater is out of service (in this example, the primary repeater 21c ). Even in this case, the return packet can be the primary repeater 21a reach by means of the trunk-trunk lines.

Fourth Embodiment

A transmission device for rail vehicle cars according to the fourth Embodiment of Invention will be explained. The fourth embodiment uses primary and secondary Trunk lines to repeaters that are installed in the car with each other to connect, and a trunk-trunk line, which is arranged in each cart to the primary and secondary trunk lines in the car to connect with each other. The primary, secondary trunk lines and trunk trunk lines form a ladder-like transmission line network, where the primary and secondary trunk lines horizontally and the trunk trunk lines extend vertically. The primary and secondary Trunk lines are used and form in a normal state bus-like transmission lines. In a normal state, the repeaters use the primary and secondary trunk lines, to repeat data. If an abnormality in the repeaters or in the trunk lines, the repeaters use the trunk trunk lines, to repeat data. Each repeater performs a transmission right circulation control similar to that first embodiment, to avoid collisions and data with low delay too to repeat.

The fourth embodiment will be described with reference to FIG 47 to 63 explained. 47 FIG. 12 shows a configuration of transmission lines in the rail vehicle car transmission apparatus according to the fourth embodiment; and FIG 48 shows a structure of one of the repeaters of the transmission device.

The repeaters include primary repeaters 31a to 31n and secondary repeaters 31a ' to 31n ' , Each of these repeaters includes two trunk transmitter-receiver ports 34a and 34b , a trunk-trunk transmitter-receiver port 34c , one (zero if the repeater is not transmitting data or receiving data within the car in which the repeater is installed) or multiple station transceiver ports 35a and 35b , a repeater controller 32 to control the data repetition between the ports, as well as an exclusive packet (token packet) routed through the repeaters and a plurality of stations 36a and 36b to transmit and receive data in the cart. In each car are the stations 36a and 36b within the repeater or outside the repeater. When the station 36b outside the repeater is as in 48 shown is the station transceiver 35b installed inside the repeater. In 48 is the station 36a within the repeater 31 and the station 36b outside the repeater 31 , A plurality of stations 36a and 36b and Station Sen the recipient 35a and 35b , which are attached to the stations, can be used.

According to the transmission apparatus of the fourth embodiment, the primary repeaters 31a to 31n with each other with the primary trunk lines 33a to 33 (n-1) and the secondary repeaters 31a ' to 31n ' with each other with the secondary trunk lines 33a ' to 33 (n-1) ' connected. The primary repeaters 31a to 31n are with the secondary repeaters 31a ' to 31n ' each with the trunk-trunk lines 33a '' and 33n '' connected. This configuration as a whole forms a ladder-like transmission line network.

The operation of the fourth embodiment having the above-mentioned configuration will be described with reference to FIG 49 to 63 explained. 49 shows a network configuration in a normal mode. In the 49 The configuration shown is based on a train of seven cars, ie n = g.

The carriage 1 contains the primary repeater 31a and the secondary repeater 31a ' , each with the primary repeater 31b and the secondary repeater 31b ' of the car 2 with the primary trunk line 33a and the secondary trunk line 33a ' are connected. The primary repeater 31a and the secondary repeater 31a ' are together with the trunk trunk line 33a '' connected. The cars 2 to 7 each contain the repeaters 31b and 31b ' to 31g to 31g ' , These repeaters are connected to each other with the trunk lines 33b and 33b ' to 33f and 33f ' and the trunk-trunk lines 33b '' to 33g '' connected in the ladder-like configuration.

This embodiment assumes that the repeater 31a at an upstream end of the network and the repeaters 31g at a downstream end thereof. The definitions of upstream and downstream are reversible. Within an effective area of the network is the most upstream repeater 31a as a tribal repeater. When the network structure is changed, the repeater serving as a parent repeater moves.

Events of fourth embodiment will be explained.

(1) normal operation

A network configuration in a normal state will be described with reference to FIG 49 explained. In the normal state form the primary repeaters 31a to 31g a primary network (1) and the secondary repeaters 31a ' to 31g ' a secondary network (2). The networks (1) and (2) are independent of each other. Accordingly, the primary network (1) may forward train control data and the secondary network (2) may forward IT service data to increase the network capacity. Of course, networks (1) and (2) can carry the same kind of data.

Through the primary network (1) transmit the primary repeaters 31a . 31b . 31c . 31d . 31e . 31f and 31g an exclusive token packet and data for the primary repeaters. The exclusive token packet is the transmission right circulation packet explained with the first embodiment.

(2) Failure of the primary repeater 31c

In 50 is the primary repeater 31c out of order. In this case, the primary repeaters capture 31b and 31d on each side of the primary repeater 31c the failure primary repeater 31c , At this time, the primary network (1) is in a network (1) ', which is the primary repeater 31a and 31b includes, and a network (1) '', which is the primary repeater 31d . 31e . 31f and 31g includes, split. To reconfigure the primary network (1), repeat the primary repeaters 31b and 31d Data for the trunk trunk lines 33b '' and 33d '' ,

(3) reconfiguring the primary network (1)

In 51 receive the secondary repeaters 31b ' and 31d ' Data from the trunk trunk lines, determine that the primary network (1) has an abnormality, and split the secondary network (2) to reconfigure the primary network (1).

The secondary repeater checks for this 31b ' an address (IP address) of the received data. If the address is the upstream side of the secondary repeater 31b ' indicates, ie if the address of the primary repeater 31a is, determines the secondary repeater 31b ' that the network abnormality on the downstream side of the primary repeater 31b is, releases the downstream secondary transmission line and repeats the data.

The secondary repeater 31d ' checks an address (IP address) of the received data. If the address is the downstream side of the secondary repeater 31d ' indicates, ie if the address of one of the primary repeaters 31e . 31f and 31g is, determines the secondary repeater 31d ' that the network abnormality on the upstream side of the primary repeater 31d is, releases the upstream secondary transmission line and repeats the data.

As a result, the primary network (1) divided into the networks (1) 'and (1) is reconfigured by the repeaters 31a . 31b . 31b ' . 31c ' . 31d ' . 31d . 31e . 31f and 31g involved. In this case is the secondary network (2) into a network (2) ', which is the secondary repeater 31e ' . 31f ' , and 31g ' , includes, and a network (2) '' that only supports the secondary repeater 31a ' includes, split.

(4) network recovery

In 52 becomes the network due to the failure of the primary repeater 31c is reconfigured to the repeater 31a . 31b . 31b ' . 31c ' . 31d ' . 31d . 31e . 31f and 31g to contain, restored. For this, each primary repeater transmits 31b and 31d regularly a test package to the primary repeater 31c ,

If a response from the primary repeater 31c is received, it is determined that the primary repeater 31c repaired, and the original network is restored.

According to this Everyone transmits this embodiment the primary Repeater a test package. Instead, the test package only transmitted from the upstream side of the network become. In this case, a twisted cable pair will be sufficient.

According to this embodiment, an abnormal point in the primary network (1) is detected from an address included in the received data. Instead, the primary repeater 31b and the secondary repeater 31b ' directly communicate data between them, or an abnormal information can be communicated directly by means of special communication means or digital signals.

Another example of a network configuration for forwarding a token packet according to the fourth embodiment will be described with reference to FIG 53 and 54 explained. The example of 53 is based on a train of seven cars, ie n = g. Operation when the network is normal, and operation when the primary repeater 31c is out of order, are the same as those related to 48 and 49 and are therefore not explained again.

(1) reconfiguring the primary network (1)

In 43 each of the secondary repeaters receives 31b ' and 31d ' Data from the trunk trunk line, determines that the primary network (1) has an abnormality, splits the secondary network (2), and tries to reconfigure the primary network (1).

The secondary repeater 31b ' checks an address (IP address) of received data. If the address is an upstream side of the secondary repeater 31b ' indicates, ie if the address of the primary repeater 31a is, determines the secondary repeater 31b ' that the network abnormality on the downstream side of the primary repeater 31b is, releases the downstream secondary transmission line and repeats the received data.

The secondary repeater 31d ' checks an address (IP address) of the received data. If the address is a downstream side of the secondary repeater 31d ' indicates, ie, if the address of one of the primary repeaters 31e . 31f and 31g is, he determines that the network abnormality on the upstream side of the primary repeater 31d is, releases the upstream secondary transmission line and repeats the received data.

As a result, the primary network (1) divided into the networks (1) 'and (1) "is reconfigured to the repeaters 31a . 31b . 31b ' . 31c ' . 31d ' . 31d . 31e . 31f and 31g to include.

According to this example, an abnormal point in the primary network (1) is determined from an address contained in the received data. Instead, the primary repeater 31b and the secondary repeater 31b ' Data can communicate directly between them, or abnormal information can be communicated directly by means of special communication means or digital signals.

According to this example, the secondary repeater repeats 31b ' also data for the upstream side, and the secondary repeater 31d ' also repeats data for the downstream side. As a result, the secondary repeaters receive 31a ' . 31e ' . 31f ' and 31g ' which are disconnected in the above-mentioned transmission control also data transmitted through the primary network (1).

(2) flow of the control packet when the primary repeater 31c is out of order

In 54 is the primary repeater 31c out of order. In this case, a token packet is sent through the repeater 31a . 31b . 31b ' . 31c ' . 31d ' . 31d . 31e . 31f and 31g in this order. The secondary repeater 31b ' does not transmit a token packet to the downstream secondary repeater 31a ' and only sends a reset packet to the downstream secondary repeater 31a ' , The secondary repeater 31d ' does not transmit a token packet to the downstream secondary repeater 31e ' and send only a reset packet there. When the reset packet is received, the secondary repeater repeats 31e ' automatically the same for the secondary repeater 31f ' , As a result, the receive secondary repeater 31a ' . 31e ' . 31f ' and 31g ' no transmission right, but can share data passed through the primary repeater.

Still another example of a network configuration according to the fourth embodiment for forwarding a token packet will be described with reference to FIG 55 to 63 explained. Operation when the network is normal, and operation when the primary repeater 31c is out of order, are the same as those related to 48 and 49 and are therefore not explained again.

(1) reconfiguring the primary network (1)

In 55 each of the secondary repeaters receives 31b ' and 31d ' Data from the trunk trunk line, determines that the primary network (1) has an abnormality, splits the secondary network (2), and tries to reconfigure the primary network (1).

The secondary repeater 31b ' checks an address (IP address) of received data. If the address is an upstream side of the secondary repeater 31b ' indicates, ie if the address of the primary repeater 31a is, determines the secondary repeater 31b ' that the network abnormality on the downstream side of the primary repeater 31b is, releases the downstream secondary transmission line and repeats the received data.

The secondary repeater 31d ' checks an address (IP address) of received data. If the address is a downstream side of the secondary repeater 31d ' indicates, ie if the address of one of the primary repeaters 31e . 31f and 31g is, he determines that the network abnormality on the downstream side of the primary repeater 31d is, releases the upstream secondary transmission line and repeats the received data.

As a result, the primary network (1) divided into the networks (1) 'and (1) "is reconfigured to the repeaters 31a . 31b . 31b ' . 31c ' . 31d ' . 31d . 31e . 31f and 31g to include.

According to this example, an abnormal point in the primary network was determined from an address included in the received data. Instead, the primary repeater 31b and the secondary repeater 31b ' Data can communicate directly between them, or abnormal information can be communicated directly by means of special communication or digital signals.

According to this example, the secondary repeater circulates 31b ' a token and also repeats data for the downstream side. Similarly, the secondary repeater circulates 31d ' a token and also repeats data for the downstream side. As a result, the secondary repeaters 31a ' . 31e ' . 31f ' and 31g ' involved in the control of 49 to 52 are included in the primary network (1).

(2) flow of a control packet (reset) when the primary repeater 31c is out of order

In 56 gives the primary repeater 31a a reset packet made by the repeater 31a . 31b . 31b ' . 31c ' . 32d ' . 31d . 31e . 31f and 31g is repeated. At the same time, the reset packet from the secondary repeater 31b ' for the upstream secondary repeater 31a and from the secondary repeater 31d ' for the downstream secondary repeater 31e ' repeated.

(3) flow of the control packet (token) when the primary repeater 31c is out of order.

In 57 will be a token packet through the repeater 31a . 31b . 31b ' . 31c ' . 31d ' . 31d . 31e . 31f and 31g repeated in this order.

(4) flow of the control packet (return) when the primary repeater 31c is out of order.

In 58 is the primary repeater 31g an endrepeater, and thus gives the primary repeater 31g a return packet after transferring data. The return package is provided by the repeater 31g . 31f . 31e . 31d and 31d ' repeated. The secondary repeater 31c ' can detect that the network is split, thus temporarily halting the retry of the received return packet.

(5) flow of the control packet (token 2) when the primary repeater 31c is out of order.

In 59 gives the secondary repeater 31d ' after receiving the return packet, a token packet to the downstream side instead of repeating the return packet for the upstream side. That of the secondary repeater 31d ' issued token packet is through the repeater 31b . 31d ' . 31f ' and 31g ' repeated.

(6) flow of the control packet (return 2) when the primary repeater 31c is out of order.

In 60 is the secondary repeater 31g ' that received the token packet, an end repeater, and thus issues a return packet after transferring data. The return package is provided by the repeater 31g ' . 31f ' . 31e ' . 31d ' . 31c ' and 31b ' repeated. The secondary repeater 31d ' already has a token to the repeater 31d and 31e ' and repeats, therefore, the upstream side return packet without stopping it. The secondary repeater 31b ' can detect that the network is split and thus temporarily pauses the received return packet without repeating it for the upstream side.

(7) flow of the control packet (token 3) when the primary repeater 31c is out of order.

In 61 gives the secondary repeater 31b ' that received the return packet, a token packet to the secondary upstream side, rather than the return packet for the primary repeater 31b to repeat. That of the secondary repeater 31b ' output token packet becomes the secondary repeater 31a ' transfer.

(8) flow of the control packet (token 3) when the primary repeater 31c is out of order.

In 62 is the secondary repeater 31a ' which has received the token packet, an end repeater, and thus issues a return packet upon transmission of data. The return package is provided by the repeater 31a ' . 31b ' . 31b and 31a repeated. The secondary repeater 31b already has a token packet to the secondary repeaters 31c ' and 31a ' and thus repeats the return packet for the upstream side without stopping it. If the return packet is the primary repeater 31a reached, a circulation of the transmission right is completed.

(9) state of each repeater when the primary repeater 31c is out of order.

In 63 is when the primary repeater 31c is faulty, the primary repeater 31a the most upstream repeater, the repeater 31a ' . 31g and 31g ' are the farthest downstream repeaters, and the other repeaters are intermediate repeaters.

When As a result, a token packet can be circulated through all repeaters, even if the networks are split.

[Fifth embodiment]

A railway vehicle transfer apparatus according to the fifth embodiment of the invention will be explained. As in 64 As shown in FIG. 5, the transmission apparatus according to the fifth embodiment includes repeaters 41a to 41n and transmission lines 43a to 43 (n-1) to connect the repeaters together. Each of the repeaters 41a to 41n includes trunk transceivers, station transceivers, stations to transmit and receive data to the repeater, and a repeater controller to control data repetition between the transceivers and an exclusive packet to control the repeater Network to form. The repeaters use an advanced type of transmission right circulation and control technique of the first embodiment to avoid collisions and ensure regular circulation.

Each of the repeaters 41a to 41n has an in 65 shown internal structure. That is, each repeater includes two or more trunk transmitter-receiver ports 44a and 44b , one (zero if the repeater is not transmitting data or receiving within the car in which the repeater is installed) or multiple ports of station transceivers 45a and 45b , the repeater controller 42 to control the data repetition between the ports as well as an exclusive packet (token packet) routed through the repeaters and the stations 46a and 46b to transfer data to and from the repeater.

The stations 46a and 46b can be within the repeater 41 or outside the repeater 41 be arranged. If the stations outside the repeater 41 are arranged, are the station transmitter-receiver 45 within the repeater 41 arranged. In 65 is the station 46a within the repeater 41 and the station 46b outside the repeater 41 arranged. Each repeater may use a plurality of the stations and the station transmitter-receiver attached to the stations.

According to the fifth embodiment, the repeaters 41a to 41n with each other with the trunk transmission lines arranged in a bus configuration 43a to 43 (n-1) arranged. Although the repeaters of this embodiment are connected to each other with the bus-like network, the repeaters may be connected to each other with the ladder-like communication network of the third and fourth embodiments.

Of the Operation of the transmission device for rail vehicle cars according to the fifth embodiment will be explained. The following explanation is based on a train of eight cars, d. H. n = h.

(1) Reset

In 66 is the repeater 41a at an upstream end of the network and the repeaters 41H at a downstream end of it. The definitions of upstream and downstream are reversible. Within an effective range of the network is the most upstream repeater 41a as a tribal repeater.

The repeaters 41a to 41h are equipped with repeater numbers in advance. In this example, they are the repeaters 41a to 41h assigned repeater numbers 41a = 00h, 41b = 01h, 41c = 02h, 41d = 03h, 41e = 04h, 41f = 05h, 41g = 06h and 41h = 07h. The repeater numbers can be any unique numbers, such as repeater IP addresses.

The repeater 41a outputs a reset packet as an indication to start a transmission right circulation. When the reset packet is received, each of the repeaters performs 41b to 41h initializes and prepares for data reception. Each of the repeaters 41a to 41h compares a transfer repeater number contained in the reset packet and the own repeater number. The transfer repeater number can be updated whenever a reset packet is issued. In this example, the transfer repeater number is 02h.

(2) Train operation instruction transmission ( 41a )

In 67 finds the repeater 41a that the transfer repeater number does not match its own repeater number, and thus transmits only one train instruction required to operate the train.

(3) Transmission Law (from 41a to 41b )

In 68 the repeater ends 41a transmitting the train operation instruction and thereafter issuing a token packet to transfer the transmission right to the downstream side.

(4) Transmission Law (from 41b to 41c )

In 69 finds the repeater 41b that the transfer repeater number does not match its own repeater number, thus transmitting only a control response required for the operation of the train and transferring the transmission right to the downstream side.

(5) Transmission of operating instructions, monitoring data and service data ( 41c )

In 70 For example, the repeater finds out that the transmission repeater number matches its own transmission repeater number and thus transmits a control response necessary for the operation of the train as well as monitoring data, service data and the like in addition to the control response.

(6) Transmission Law (from 41c to 41d )

In 71 the repeater ends 41c the transmission of all data and outputs a token packet to transfer the transmission right to the downstream side.

The above-mentioned operations are repeated as in a timing chart of 72 to distribute the transmission of the data except a train operation instruction (instruction and answer) so that the transmission right can be circulated within the predetermined time and the train operation instruction can be transmitted to all the repeaters within a predetermined time "t".

The fifth embodiment compares a given transmission repeater number with the repeater number of a repeater that has received the transmission repeater number to find a complete match between them. Instead, a mask may be used to transmit data except a train operation instruction from a plurality of repeaters. For example, bit 2 of a repeater number is masked, and bit 0 and bit 1 thereof are compared with a given transfer repeater number. In this case, a transfer repeater number of, for example, 02h may be the repeater 41c which is equipped with the repeater number 02h, and the repeater 41g , which is equipped with the repeater number 06h, make transfer monitoring data and service data.

A transmission right may be circulated several times to regulate the transmission of train operation instructions and to optimize a bandwidth allocated for data other than the train operation instructions. This will be with reference to 73 explained. The repeater 41a outputs a reset packet (bit 7 = 0 in this example) to request the transmission of train operation data. If all repeaters 41a to 41h stop the transmission of Zugbetriebsdaten, gives the repeater 41a a reset packet (bit 7 = 1 in this example) to request the transmission of data other than the train operation data in the remaining time. Each repeater includes a timer for monitoring time, similar to the second embodiment, and when the time has expired, the transmission right gives fast to the root repeater 41a back. This process is the same as that of the second embodiment.

In 73 Monitoring data are transmitted separately from Zugbetriebsdaten. If the monitoring data must be transmitted at regular intervals, they may be included in the train operation data which is transmitted periodically. Ie. by recording a transgression In a reset packet, the monitoring data is transmitted at regular intervals. As mentioned above, circulating a transmission right for transmitting data except for the train running data in a redundant time broadens a bandwidth for transmitting the data except for the train running data in a short train of rail vehicle cars and ensures the regularity of transmission of the train running instructions.

Even though this embodiment a plurality of transmission rights circulated, it is possible Transfer data other than train operation data when transferring a return packet.

As explained above the invention provides a transmission device for rail vehicles, which uses a CSMA / CD network and an exclusive package through each other Relay connected to a bus forwards data collisions avoid a limitation eliminate in the number of connected stages and data with lower delay to repeat.

The Invention also provides a transmission device for rail vehicles, which is capable of using a CSMA / CD method which is low Cost can be produced and has a high versatility.

The Invention also provides a transmission device for rail vehicles, the a CSMA / CD network used the repeater together with primary and secondary trunk lines and trunk-trunk lines (arranged in each car) connecting around a ladder-like transmission line network form, with the trunk trunk lines Improve redundancy.

Claims (4)

Railway vehicle transfer device, comprising: a primary repeater ( 21a - 21n ) and a secondary repeater ( 21a ' - 21n ' ) installed in each rail vehicle car and each configured to be powered by another repeater ( 21a - 21n ; 21a ' - 21n ' ) and receive received data to another repeater ( 21a - 21n ; 21a ' - 21n ' ) to repeat; a primary trunk line ( 23a - 23n ) to the primary repeaters ( 21a - 21n ) to connect with each other; a secondary trunk line ( 23a ' - 23n ' ) to the secondary repeaters ( 21a ' - 21n ' ) to connect with each other; a trunk trunk line ( 23a '' - 23n '' ) to the primary and secondary repeaters ( 21a - 21n ; 21a ' - 21n ' ) to connect with each other in each rail vehicle car; a trunk transceiver ( 24a . 24b ), which in each repeater ( 21a - 21n ; 21a ' - 21n ' ) is installed and configured to transfer data to and from another repeater ( 21a - 21n ; 21a ' - 21n ' ) to transmit and receive in another rail vehicle car; a trunk-trunk transceiver ( 24c ), which in each repeater ( 21a - 21n ; 21a ' - 21n ' ) is installed and configured to transfer data to and from the other repeater ( 21a - 21n ; 21a ' - 21n ' ) to transmit and receive in the same rail vehicle car; a repeater controller ( 22 ), which is installed and configured to connect the trunk transceiver ( 24a . 24b ) and the trunk-trunk transmitter-receiver ( 24c ) and to form a network; a station transceiver ( 25a . 25b ) installed and configured in each repeater to send data to and from the repeater controller ( 22 ) to transmit and receive; a station connected to the station transceiver ( 25a . 25b ) and configured to send data to and from the station transceiver ( 25a . 25b ) and to transmit and receive the primary trunk line ( 23a - 23n ), the secondary trunk line ( 23a ' - 23n ' ) and the trunk trunk lines ( 23a '' - 23n '' ) form a ladder-like transmission line network; each repeater ( 21a - 21n ; 21a ' - 21n ' ) receiving data from another repeater, the received data through the trunk trunk line ( 23a '' - 23n '' ) to another repeater ( 21a - 21n ; 21a ' - 21n ' ) in the same rail vehicle car and through the trunk line ( 23a - 23n ; 23a ' - 23n ' ) to another repeater ( 21a - 21n ; 21a ' - 21n ' ) is repeated in the adjacent rail car; and every repeater ( 21a - 21n ; 21a ' - 21n ' ), the same data through the trunk line and through the trunk trunk line ( 23a '' - 23n '' ), which repeats first received data. Transmission device according to claim 1, wherein: each repeater ( 21a - 21n ; 21a ' - 21n ' ), the same data through the trunk line ( 23a - 23n ; 23a ' - 23n ' ) and through the trunk-trunk line ( 23a '' - 23n '' ), examines a check code at the end of a data frame, and repeats the data that was first found to be correct according to the test. A transmission apparatus according to claim 1, wherein: an exclusive packet for a transmission right through said primary repeaters ( 21a - 21n ). Transmission device according to claim 1, when: an abnormality in one of the primary repeaters ( 21a - 21n ) and / or the primary trunk line ( 23a - 23n ), an exclusive packet of transmission right through the secondary repeaters ( 21a ' - 21n ' ) to form a network capable of avoiding data collision.