CN1700632A - Information transmission system - Google Patents
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- CN1700632A CN1700632A CNA2005100521404A CN200510052140A CN1700632A CN 1700632 A CN1700632 A CN 1700632A CN A2005100521404 A CNA2005100521404 A CN A2005100521404A CN 200510052140 A CN200510052140 A CN 200510052140A CN 1700632 A CN1700632 A CN 1700632A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 102
- 238000005096 rolling process Methods 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/10—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with air supply, or exhaust, through perforated wall, floor or ceiling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1413—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
An NCP11 in the first system is connected to a trunk transmission path 1N in the first system via a switching hub 12 in the first system. It is connected to an equipment controller 15 in the first system, an equipment controller 25 in the second system, and a switching hub 22 in the second system via a control information transmitter 13 in the first system. It is connected to information equipment 16 in the first system via a media information transmitter 14 in the first system. The second system is the same. A switching hub 2 transmits control information preferentially when it receives the control information and the media information. A control information transmitter 3 receives data from two trunk transmission paths N, and transmits the data from the same system as a local station to an equipment controller 5. In case that the transmission is interrupted in one trunk transmission path N by trouble, it relays the data that the other trunk transmission path N has received to the trunk transmission path N where the transmission is interrupted.
Description
Technical field
The present invention relates to a kind of in-vehicle network, relate in particular to a kind of information transmission system of backbone network at rolling stock.
Background technology
The in-vehicle network of rolling stock is that purpose has obtained exploitation to simplify wiring in the vehicle etc., and it is used to the monitor (collection of state information) of vehicle machine at first.Now, the network of data transmission bauds 2～3Mbps is practical, and the transmission of control information (instruction of control vehicle machine etc.) also becomes possibility.And the demand of the multimedia server in the vehicle has improved, meanwhile, because the transmission of the big capacity multimedia messages that in-vehicle network made or Internet connection etc. are all accomplished.In-vehicle network one example as rolling stock, now disclose: every vehicle is provided with two band to band transfer module, connect by the 1st transmission line loop between the band to band transfer module of each vehicle, 2 band to band transfer module that are provided with at each vehicle interior connect by the 2nd transmission line simultaneously, when the 1st transmission line between vehicle has disconnection in a plurality of places, constitute the such technology (with reference to patent documentation 1) of meander wire according to the 2nd transmission line in the vehicle.
But, if the media information of using for multimedia server according to transmission simultaneously by in-vehicle network, then can mix, the impaired such problem of real-time of control information can take place to cause owing to the transmission of media information with a control information of machine control usefulness of buying car in installments.Like this, just can not guarantee to control the necessary response of vehicle machine.And, for network on the car, need such high reliability, even can not stopping can to move on the line immediately, the train that breaks down do not repair the place, in other words, need redundancy for the fault of net machine or the disconnection of transmission line.
Patent documentation 1: the spy opens flat 11-154891 communique (paragraph 0020～0024, Fig. 1, Fig. 2)
Summary of the invention
Therefore, its purpose of the present invention is, in view of the above problems, provides a kind of in the in-vehicle network of rolling stock, even in media information simultaneously, also can guarantee the real-time of control information, guarantees the mechanism of higher reliability simultaneously for network failure.
For solving above-mentioned problem, the present invention is a kind of by between rolling stock, connects the in-vehicle network of each vehicle; With in each vehicle, be provided with, the information transmission system that connects the transmission control unit formation of the machine in above-mentioned in-vehicle network and the vehicle, the feature that mainly has the following stated, at first, the information transmission system, have transmission control unit, it will be used to control the control information of the vehicle machine that is connected with in-vehicle network, and the transmission line by metal medium transmits with the data transmission bauds more than the 100Mbps.Like this, guarantee vehicle the operation of a machine and response in the rolling stock.
Then, transmission control unit has: the control information transport part, and it receives and dispatches the signal of vehicle machine and control information (control series data); The media information transport part, it carries out machine and media information (information series data) is received and sent messages; Switching hub, it is connected with in-vehicle network, control information transport part and media information transport part, the relaying that carries out control information between in-vehicle network and control information transport part carries out the relaying of media information between in-vehicle network and media information efferent.Wherein, switching hub, the control information that to accept from the control information transport part and when the media information that media delivery portion accepts sends to in-vehicle network with reference to the data of the priority of setting in the various information of expression, sends various information in proper order according to the height of its priority.At this moment, according to the priority of setting in the control information, than the priority height of setting in the media information, switching hub preferentially sends control information.Like this, even control information and media information are mixed, also can not damage the real-time of control information.
Secondly, as the formation of redundancy, connect by 2 in-vehicle networks between each vehicle, in each vehicle, switching hub is connected with each in-vehicle network, connects 2 control information transport parts between its 2 switching hubs.The control information transport part, when the vehicle machine was accepted control information, the control information of its acceptance sent to 2 switching hubs.Then, accept the control information transport part of this control information,, this control information is sent to the switching hub that does not have the opposing party of accepting when either party switching hub is accepted control information.Like this, even the part of in-vehicle network breaks down, also can continue transmission information by circuit switched.Also have, the control information transport part is when sending control information, according to given cycle transmission information.Then, accept the control information transport part of this control information, when in the time of the given multiple that is equivalent to this cycle, not accepting control information, judge that this in-vehicle network breaks down.Like this, the short time is carried out the circuit switching when fault takes place.
According to the present invention, in the in-vehicle network of rolling stock, even simultaneously control information transmission and media information also can be guaranteed the real-time of control information.And, can guarantee high reliability for the fault of network.
Description of drawings
Fig. 1 is the figure of the in-vehicle network formation of the information transmission system in the rolling stock of expression embodiments of the present invention.
Fig. 2 is the figure of the formation of the NCP of 1 vehicle of expression embodiments of the present invention and its periphery.
Fig. 3 is the kind of the control information of the information transmission system of expression embodiments of the present invention and the figure of data volume.
Fig. 4 is the figure of the situation of the delay generation of the NCP of expression embodiments of the present invention.
Fig. 5 is the figure of the formation of the transmission frame of expression embodiments of the present invention.
Fig. 6 is the figure of the formation of the functional module of the priority treatment of switching hub in the expression embodiments of the present invention.
Fig. 7 for expression in the embodiments of the present invention according to the make a circulation figure that controls of NCP.
Wherein: 1-NCP (transmission control unit), the 2-switching hub, 3-control information transport part, 4-media information transport part, 5-equipment control device, 6-information machine, N-backbone transport circuit (in-vehicle network), 11-1 series NCP (transmission control unit), 12-1 series switching hub, 13-1 series control information transport part, 14-1 series media information transport part, 15-1 series equipment control device, 16-1 series information machine, 1N-1 series backbone transport circuit (in-vehicle network), 21-2 series NCP (transmission control unit), 22-2 series switching hub, 23-2 series control information transport part, 24-2 series media information transport part, 25-2 series equipment control device, 26-2 series information machine, 2N-2 series backbone transport circuit (in-vehicle network), 31-vehicle machine.
Embodiment
Below, elaborate with reference to accompanying drawing about implementing optimised form of the present invention (below, be " embodiments of the present invention ").
(network of the information transmission system constitutes and summary)
With reference to Fig. 1, illustrate that the network about the information transmission system in the rolling stock in the embodiments of the present invention constitutes.Every vehicle (No. 1 car 10a, No. 2 car 10b, No. 3 car 10c ...), 1 series and 2 series 2 NCP (Network Control Processor, transmission control unit) are set respectively.Each NCP1 (1 serial NCP11,2 serial NCP21) strides across backbone transport circuit N (1 serial backbone transport circuit 1N, the 2 serial backbone transport circuit 2N) connection of the in-vehicle network of each vehicle and dual system setting then.
In addition, in description of the present embodiment, when the inscape of expression 1 series or 2 series, according to for example " 1 serial NCP11 " or " 2 serial NCP21 " such record, no matter 1 series or 2 series are explained like that according to for example " NCP1 " when the general inscape of explanation.
Backbone transport road N is for metal or the optical fiber transmission road as communication media.NCP1 by this backbone transport circuit N, with the data transmission bauds more than 100Mbps transmission data, is used to control the control information of vehicle machine 31 (with reference to Fig. 2) according to transmission, can guarantee the runnability or the response of vehicle machine 31.And, NCP1, the backbone transport circuit N of supervision dual system is according to the circuitous deal with data of necessity.NCP1 is that independent body (the NCP1 with other does not exchange) carries out fault detect and circuitous the processing, but the high speed circuit switched.In addition, equipment control device 5 is connected with NCP1, connects vehicle machine 31 (with reference to Fig. 3) by a spider lines in addition.Here, vehicle machine 31 is the door of for example vehicle, brake, transducer etc.
(its periphery of NCP (transmission control unit) constitutes)
With reference to Fig. 2, illustrate about the NCP in 1 vehicle in the embodiments of the present invention and the formation of its periphery.
At first, illustrate about the formation of NCP1 with and periphery.NCP1 is made of switching hub 2, control information transport part 3 and media information transport part 4.
Switching hub 2 is public switching hub, and transmission means is a store-and-forward mode.In this mode, the frame of accepting from each port cushions (storage), outputs to suitable port (forwarding) afterwards.At this moment, the frame of different port can be handled side by side.Therefore, different with the repeater mode that the signal of accepting is directly exported, can not produce the frame conflict.And switch hub 2 is to adopt and IEEE802.1Q/p specified priority signal post corresponding equipment.In this standard, defined extended MAC (the Media Access Control) head of record priority.Switching hub 2, the output with each priority cushions (formation), the output earlier that priority is high.Utilize this function, transmission when realizing control information and media information than the frame priority height of information system according to the frame of control system.In addition, switching hub 2, the LSI (Large Scale Integrated Circuit, i.e. large scale integrated circuit) for special use moves by hardware.
As shown in Figure 2, the transmission data of backbone transport circuit N, when each vehicle via the switching hub 2 of NCP1.Switching hub 2 is transmitted regenerative repeating with the frame of accepting by storage.Transmission range between the switching hub 2 is the long like that about 20m of 1 vehicle.This value has been lacked much than the 100m of the standard of the 100Base-TX of Ethernet (Ethernet logins trade mark).Therefore, there is not to produce the deterioration problem of signal owing to long-distance transmissions.And in the standard of Ethernet (Ethernet logins trade mark), different with repeater, switching hub 2 is not connected the restriction of platform number.Therefore, can in the composition of train is all, carry out long-distance transmissions.
In the control information transport part 3, have and equipment control device 5 between the function of receiving and transmitting signal and the circuitous controlled function of backbone transport circuit N when breaking down.These functions realize according to the routine processes of CPU (Central Processing Unit, central processing unit).For with backbone transport circuit N (the 1 serial backbone transport circuit 1N that realizes the circuitous dual system that is provided with, 2 serial backbone transport circuit 2N), be connected with equipment control device 5 (1 serial equipment control device 15, the 2 serial equipment control devices 25) both sides of dualization and 4 Ethernets (Ethernet logins trade mark) port is set.
Handle and the receiving and sending messages of 6 of information machines media information transport part 4.And because information machine 6 transmission are disturbed or error message, for not hindering the transmission of control information, media information transport part 4 has firewall functionality.This also can realize by the routine processes of CPU, and 2 Ethernets (Ethernet the logins trade mark) port that is connected with information machine 6 with backbone transport circuit N (switching hub 2) is set.As concrete firewall functionality, when the information with information machine 6 outputed to switching hub 2, this information of verification with the information that is not media information, made it can not output to switching hub 2 after for example abandoning with the same information of control information.The judgement of information category, the identifier (under the situation of Ethernet (Ethernet login trade mark), employing address and port numbers etc.) that writes in a part that adopts to information.Here, information machine 6, for for example, the passenger in the car or towards crew's notice display device or sonic transceivers device etc.
In addition, control information transport part 3 and media information transport part 4 can write the program (remote download) of replacing himself via network, carry out upkeep operation easily.At this moment, can not write the program wrong according to information machine 6.That is, media information transport part 4 has 2 network interfaces (Ethernet (Ethernet logins trade mark) port), and only being accepted as of program accepted from backbone transport circuit N (switching hub 2), also can be destroyed even accept program from information machine 6.And the data of remote download are handled as control information (control coefrficient certificate), by above-mentioned firewall functionality information machine 6 can not be transmitted to backbone transport circuit N (switching hub 2).
Among the NCP1, equipment control device 5 connects by Ethernet (Ethernet logins trade mark), connects 1 or many vehicle machines 31 from equipment control device 5 by a spider lines.Prop up in the spider lines, adopt the good CAN (Control Area Network, control area network) of real-time, jumbo Ethernet (Ethernet logins trade mark), RS-485 etc.Equipment control device 5 sends to backbone transport circuit N collect data from each vehicle machine 31 after, will be from sending to the vehicle machine 31 of needs after the data that backbone transport circuit N accepts are cut apart.Can limit the frame number of propagating among the backbone transport circuit N like this, alleviate network load and NCP and handle load.Here, also can not pass through equipment control device 5, directly connect such formation according to control information transport part 3 and vehicle machine 31.
In addition, be limited to the space that is provided with of the interior machine of rolling stock, to accomplish that the space of vacating disposes machine neatly.Therefore, the media information transport part 4 of NCP1, switching hub 2 and control information transport part 3, and equipment control device 5 connect by universal serial bus (network).Under the situation in the past by the parallel bus connection, owing to receive and send messages by the majority signal line, can not leave each machine and be provided with, but just can carry out message transmission with less holding wire between machine in universal serial bus, the place of leaving each machine also can be provided with.In this case, also can concentrate identical with the past is arranged on a place.
Then, connecting and composing about the dual system in 1 vehicle is described.1 serial NCP11 is connected with 1 serial backbone transport circuit 1N by 1 serial switching hub 12.And, by 1 serial control information transport part 13, be connected with 1 serial equipment control device 15,2 serial equipment control devices 25 and 2 serial switching hubs 22.Also have, be connected with 1 series information machine 16 by 1 serial media information transport part 14.On the one hand, 2 serial NCP21 are connected with 2 serial backbone transport circuit 2N by 2 serial switching hubs 22.And, by 2 serial control information transport parts 23, be connected with 1 serial equipment control device 15,2 serial equipment control devices 25 and 1 serial switching hub 12.Also have, be connected with 2 series information machines 26 by 2 serial media information transport parts 24.In addition, be connected with 2 serial switching hubs 22 according to 1 serial control information transport part 13,2 serial control information transport parts 23 are connected with 1 serial switching hub 12, the control of just can making a circulation when backbone transport circuit N breaks down.
1 serial equipment control device 15 and 2 serial equipment control devices 25 are connected with vehicle machine 31.If so, then the vehicle machine 31, just can even a side equipment control device 5 breaks down also can be controlled by equipment control device 5 controls of 2 series.
(guaranteeing the execution mode of the real-time of control information)
Backbone transport circuit N is for a plurality of switching hubs 2 connect and compose.Therefore, the speed when frame passes through switching hub 2 is the time of delay of backbone transport circuit N.Switching hub 2 owing to move according to store-and-forward mode, frame by the time can be equivalent to the delay of frame length.And, other frame by identical port under situation about sending, to wait until send finish till, also can produce so many delays.
Owing to depend on frame length time of delay, at first, arrangement is about the arrangement of transmission data.Fig. 3, the kind and the data volume of the control information in the expression information transmission system.Correct data volume also can change according to the machine formation.The value of Fig. 3, a control and maintenance information are collected with required standard traffic in order to buy car in installments.These all transmit according to UDP/IP (User Datagram Protocol/Internet Protocol), in the data volume, also comprise 50 bytes that MAC head (22 bytes that contain the CRC data), IP head (20 bytes) and UDP head (8 bytes) add up to.What wherein real-time was had relatively high expectations is 10ms cycle data and voice data.In the 10ms cycle data, transmission is controlled as the relevant control information of the fail safe of the trains such as instruction of the transducer of vehicle machine 31 or brake.And voice data is even in order also to communicate between passenger and the crew under the situation about having an accident etc., therefore require real-time.
With reference to Fig. 4, the generation about postponing among the NCP is described.Media information (information series data) and control information (control series data) mix under the situation of transmission, preferentially send than the media information of send waiting for according to the priority treatment control information.But, can not surpass the control information of preserving in the media information in transmission (maximum 1518 bytes) and the buffering area of posting a letter before.Under these simultaneous situations, transmission delay is maximum.As shown in Figure 4, accept frame A,, accept frame B, then accept frame C from the adjacency vehicle from equipment control device 5 in the moment that begins to send from information machine 6.At this moment, transmit frame C, after transmit frame A and frame B, and the transmitting time of frame C (time that is equivalent to frame length) also become delay factor.For example, if with frame B as service data (1522 byte), frame C is as voice data (314 byte), because data transmission bauds is 100Mbps, then is as follows time of delay.
Media information transmitting time+service data transmitting time+voice data sends the time
=(1518+1522+314) byte * 8/100Mbps
=268.32 μ S/ terminal identities
This value is than the maximum 1[ms/ terminal identity of the time of delay of being controlled by machine that response allowed] also much smaller, can guarantee the needed real-time of in-vehicle network.
As corresponding, illustrate about priority treatment according to switching hub with the delay of above explanation.The agreement of priority treatment adopts IEEE802.1Q/p.As foundation, adopt the expansion frame that appends the label of 4 bytes of definition priority in the message transmission with this standard.Fig. 5 represents the formation of this frame.Label is by the inner definition of MAC head.On the standard, priority may be defined as 8 grades, " controls system " and the priority of 2 grades of " information system " for definition in the information transmission system.Like this, the control information transport part 3 of NCP1 is provided with " control system " by equipment control device 5 in the label of the MAC of accepted control information head, improve the priority of control information transmission.And the media information transport part 4 of NCP1 by set " information system " the label of the MAC head of the medium of accepting from information machine 6, just can reduce the priority of transmitting multimedia information.In addition, control information transport part 3 and media information transport part 4 are not the settings of fully similarly carrying out priority, can set according to the kind of the information of accepting yet.For example, control information transport part 3 also can be such according to being set at the highest priority for 10ms cycle data shown in Figure 3 or voice data.And " data " of Fig. 5 are for comprising IP head and UDP head.
Fig. 6 represents the formation of the functional module in the priority treatment of switching hub.Switching hub 2 is by output scheduling program 63, Priority Queues 64, non-Priority Queues 65, accept port 66 and transmit port 67 etc. and form.Accept the data (frame) of input in the port 66,, be kept in Priority Queues 64 or the non-Priority Queues 65 according to the priority that label is represented.Output scheduling program 63 after Priority Queues 64 or non-Priority Queues 65 input data, outputs to transmit port 67.Fig. 6 represents to accept and accept the processing of port 66 under the situation of same transmit port 67 dateouts from a plurality of.Each is accepted in the port 66, and independent respectively (concurrent activity simultaneously) accepts data.Save the data in the Priority Queues 64 or non-Priority Queues 65 of output queue of each priority according to the label of MAC head then.At this moment Priority Queues 64 and non-Priority Queues 65 all will be prepared at each transmit port 67.Here, significant data 61 is kept at Priority Queues 64, and data 62 are kept at non-Priority Queues 65.Output scheduling program 63 preferentially sends the data of Priority Queues 64, owing to do not have data in the Priority Queues 64, so send the data of non-Priority Queues 65.Therefore, as shown in Figure 6, the order of pressing significant data 61, data 62 sends.
According to the priority treatment of above such switching hub, can realize not damaging the real-time of control information, transmission in the time of with media information.
(about the explanation corresponding) with the time of delay in the message transmission
From with the different viewpoint of execution mode of the real-time of the control information of guaranteeing above explanation, illustrate about with message transmission in time of delay corresponding.
Under the situation that adopts conduct for the switching hub mode of the bus access mode of backbone transport circuit N, owing to transmitting all accept frame in switching hub 2 after, institute thinks the storage relay type.In this case, the platform number that does not have collision problem or restriction switching hub 2.But in a single day,, can produce the delay of frame length tolerance owing to accept to begin relaying behind the frame.The minimum frame size of the Ethernet of 10Mbps (Ethernet logins trade mark) is 64 bytes, and its largest frames size is 1518 bytes, and the needed time of the acceptance of frame is respectively 0.05ms, 1.2ms.This delay, every process switching hub 2 (passing through vehicle) all can take place.And a plurality of nodes send under the data conditions simultaneously, when priority is identical by the sequential processes that arrives first, after to data can produce the delay of sending the time till the data that arrive first.
This time of delay, can be reduced by the data transmission bauds that improves backbone transport circuit N.If data transmission bauds is 100Mbps, the minimum frame of Ethernet (Ethernet logins trade mark) and the time of accepting of largest frames are respectively 0.005ms, 0.12ms.Next calculates detailed time of delay, and is little owing to postponing than repeater mode if data transmission bauds is 100Mbps, therefore can be suitable for and in-vehicle network.
And, advantage as store-and-forward mode, because switching hub 2 detects the matching (according to CRC (Cyclic Redundancy Check, the promptly cyclic redundancy detects) data of Fig. 5) of frame, can prevent to flow to when misdata is careless backbone transport circuit N.
Here, the time of delay till the node that calculates node (for example equipment control device 5) end that sends control information from the outset according to following hypothesis is accepted.
(a) the node number is made as 10 (form by 8, there are 2 nodes at the two ends of each vehicle).
(b) data long (comprising head) are made as 114 bytes of control information (0.01ms), and service data (from the fault message of vehicle machine 31 etc.) is made as 1522 bytes (0.12ms).
(c) in each node, the front of control information is made as the service data that sends same priority.
Suppose in (c) that if consider that the occurrence frequency of actual service data may not be real, the maximum situation that can be used as transmission quantity is considered.And, do not consider (correctly be to have produced small delay, but because priority treatment not producing big influence) owing to priority is low about media information.
According to the relay delay of switching hub 2,, be 0.01 (ms) * 10 (label)=0.1ms therefore because each node all can take place.
According to the delay of the service data that sends before the control information, because being positioned at the middle node of transmission line, each all can take place, be 0.12 (ms) * 8 (label)=0.96ms therefore.
Therefore, the minimum value of delay is 0.1ms, and maximum is 1.06ms.This is the time of delay of taking place in the switching hub 2 of NCP1.In fact, it is added transmitter side and accept the control information transport part 3 of side NCP1 separately and the processing delay of equipment control device 5.Control information transport part 3 is accepted to carry out routine processes by CPU behind the frame.At this moment delay is about a hundreds of μ s, and supposition here is 1ms to the maximum.And equipment control device 5 carries out the period treatment of 10ms earlier, the delay that conference produces this periodic quantity.More than, the transmission machine till from the equipment control device 5 of transmitter side to the equipment control device 5 of accepting side postpones, and is 1.06+ (1+10) * 2=23.06ms (maximum).
(guaranteeing the execution mode of the high reliability of backbone transport circuit)
Each NCP1 is connected with the backbone transport circuit N of dual system, guarantees high reliability according to the control of initiatively making a circulation during fault.With reference to Fig. 7, illustrate about this circuitous control (suitably with reference to Fig. 2).Fig. 7, the data transmission link among No. 1 car 10a of the situation that generation disconnects in 2 places of expression backbone transport circuit N." * " among the figure is the place of broken string.As the 1 serial NCP11 of No. 1 car 10a in the transmission source of data, to the backbone transport circuit N of dual system, promptly 1 serial backbone transport circuit 1N and 2 serial backbone transport circuit 2N send identical data all the time.The control information transport part 3 of each NCP1, accept these from the backbone transport circuit N of dual system after, the data that will accept from the backbone transport circuit N with this TV station identical systems send to equipment control device 5, an existing side's data are destroyed usually.After breaking down among the backbone transport circuit N, under the situation that a side backbone transport circuit N transmission is interrupted, the data of accepting by the opposing party's backbone transport circuit N in the time of equipment control device 5 transmission, the side's that these data are interrupted to transmission backbone transport circuit (N)-relay (transmission).Under the situation of Fig. 7, the 2 serial NCP21 of No. 2 car 10b, by having no progeny in the 2 serial backbone transport circuit 2N detected transmission, the data of No. 1 car 10a that 1 serial backbone transport circuit 1N is accepted are to 2 serial backbone transport circuit 2N relayings.Similarly, the 1 serial NCP11 of No. 3 car 10c is by the data of 2 serial backbone transport circuit 2N to No. 1 car 10a of 1 serial backbone transport circuit 1N relaying.
As the fault detect mechanism of backbone transport circuit N, can consider (1) detect the state (linking status etc.) of the physical layer of network, (2) according to fault detect with the transmitting-receiving of data detect, (3) according to the detection that has or not of the receive status of transmitting data.(1) in the mode, can not detect link and establish but such fault of can not receiving and sending messages.And in (2) mode, for high speed detection need send the fault detect data with the cycle faster than the 10ms in cycle of control data, if but the consideration handling property is just unrealistic.Here, the detection of fault is as (3) the receive status detection mode according to the transmission data.Control information is several kinds shown in Figure 3, wherein adopts 10ms cycle data verification receive status.In the time of the several times of transmission cycle, do not accept under this data conditions, then judge among the backbone transport circuit N and break down.Take place from fault like this, the time till extremely transmission continues according to making a circulation is the short time of tens of ms.
In the above method, be a plurality of NCP1 detection failure simultaneously almost.At this moment, even the circuitous control of any one NCP1 can be with transfer of data to remaining NCP1.In the example of Fig. 7, for the disconnection between No. 2 car 10b and No. 3 car 10c, the 1 serial NCP11 of No. 3 car 10c of circuitous control also can transmit data even the 1 serial NCP11 of No. 4 car 10d is circuitous.And, 1 serial NCP11 and 2 serial NCP21 in each vehicle, any one makes a circulation can.Which as for NCP1 make a circulation to control, to simplify the process by following rule decision.(1) by carrying out from the local nearest vehicle of fault; (2) under the situation that crankback failure etc. can't make a circulation, inferior near vehicle is circuitous; (3) 1 serial NCP11, under the situation of interrupting from 1 serial backbone transport circuit 1N acknowledge(ment) signal by 2 serial backbone transport circuit 2N to 1 serial backbone transport circuit 1N relay data.2 serial NCP21, under the situation of interrupting from 2 serial backbone transport circuit 2N acknowledge(ment) signals, by 1 serial backbone transport circuit 1N to 2 serial backbone transport circuit 2N relay datas.
These are according to following realization.Each NCP1, when transmission is interrupted, wait for and transmission source and this vehicle between the corresponding time of distance (being made as 0 in abutting connection with the vehicle stand-by period).NCP1 by other between the stand-by period begins to make a circulation to accept data, stops circuitous the preparation.If do not accept the stand-by period process of the state of data, afterwards the data accepted from other system of relaying then.Like this, in case produce fault, the fault place begin immediately to make a circulation in abutting connection with vehicle.Under the situation that the adjacency vehicle can not make a circulation owing to certain fault, inferior near vehicle makes a circulation to control.These actions for initiatively carrying out do not need the transmission of the line information etc. between the NCP1.
Like this, even break down among the backbone transport circuit N,, can guarantee the reliability of in-vehicle network requirement with the NCP1 of the tens of ms adjacency control of also can initiatively making a circulation.
More than illustrated about embodiments of the present invention, to be recorded in by the program that each inscape shown in Figure 2 is carried out on the recording medium that can read by computer, read the program that writes down on this recording medium on computers, according to execution, just can realize the information transmission system in the embodiments of the present invention.
More than just made illustration about relevant suitable execution mode of the present invention, but embodiments of the present invention are not limited in this, in the scope that does not break away from purport of the present invention suitable change can also be arranged.
Claims (8)
1, a kind of information transmission system is the information transmission system that is used in the in-vehicle network in the rolling stock, it is characterized in that,
Have transmission control unit, it will be used to control the control information of the vehicle machine that is connected with above-mentioned in-vehicle network, and the transmission line by metal medium transmits with the data transmission bauds more than the 100Mbps.
2, a kind of information transmission system is by in rolling stock, connects the in-vehicle network between each vehicle, constitutes with the transmission control unit that is provided with in each vehicle, be connected the machine in above-mentioned in-vehicle network and the vehicle, it is characterized in that,
Above-mentioned transmission control unit comprises:
The control information transport part, it is connected with vehicle machine or the equipment control device of controlling this vehicle machine, receives and dispatches the signal of this vehicle machine and control information;
The media information transport part, it is connected with information machine, receives and dispatches the signal of this information machine and media information; And
Switching hub, it is connected with above-mentioned in-vehicle network, above-mentioned control information transport part and above-mentioned media information transport part, the relaying that carries out above-mentioned control information between above-mentioned in-vehicle network and above-mentioned control information transport part; Between above-mentioned in-vehicle network and above-mentioned media information efferent, carry out the relaying of above-mentioned media information,
Wherein, the data of expression high priority when above-mentioned vehicle machine receives control information, are set in above-mentioned control information transport part in the control information that this receives, send to above-mentioned switching hub,
The data of expression low priority when above-mentioned information machine receives media information, are set in above-mentioned media information transport part in the media information of this acceptance, send to above-mentioned switching hub,
Above-mentioned switching hub, in the control information that will receive and when the media information that above-mentioned media delivery portion receives sends to above-mentioned in-vehicle network from above-mentioned control information transport part, with reference to the data of the above-mentioned priority of expression, send various information in proper order according to the height of this priority.
3, the information transmission system according to claim 2 is characterized in that,
Above-mentioned control information transport part is when needing the machine control information of high responsiveness or acoustic information in above-mentioned control information, sets the data of expression limit priority in this control information.
4, according to the claim 2 or the 3 described information transmission systems, it is characterized in that,
Above-mentioned media information transport part when the information of accepting from above-mentioned information machine is not media information, does not send to above-mentioned switching hub with this information.
5, the information transmission system according to claim 4 is characterized in that,
The rewriting of program can be carried out via above-mentioned switching hub from above-mentioned in-vehicle network in above-mentioned control information transport part,
Program rewriting can be carried out via above-mentioned switching hub from above-mentioned in-vehicle network in above-mentioned media information transport part, can not carry out program rewriting from above-mentioned information machine.
6, according to each the described information transmission system in the claim 2～5, it is characterized in that,
Between above-mentioned media information transport part, above-mentioned switching hub, above-mentioned control information transport part and the above-mentioned equipment control device each connects, and undertaken by universal serial bus.
7, a kind of information transmission system is by in rolling stock, connects 2 in-vehicle networks between each vehicle, constitutes with 2 transmission control units that are provided with in each vehicle, be connected the machine in above-mentioned in-vehicle network and the vehicle, it is characterized in that,
Above-mentioned 2 transmission control units in the middle of separately, comprise at least:
The control information transport part, it is connected with vehicle machine or the equipment control device of controlling this vehicle machine, receives and dispatches the signal of this vehicle machine and control information; And
Switching hub, it is connected with the control information transport part of above-mentioned in-vehicle network, this device and the control information transport part of other device, between the control information transport part of above-mentioned in-vehicle network and above-mentioned device, and the relaying that between the control information transport part of above-mentioned in-vehicle network and above-mentioned other device, carries out above-mentioned control information
Wherein, above-mentioned control information transport part when above-mentioned vehicle machine receives control information, sends to the switching hub of this device and the switching hub of other device with this control information that receives,
When the switching hub from the switching hub of this device and other device received control information, the control information that will receive from the switching hub of above-mentioned device sent to above-mentioned vehicle machine,
When the switching hub from the switching hub of this device or other device receives control information, this control information is sent to the switching hub of the side of not receiving.
8, the information transmission system according to claim 7 is characterized in that,
Above-mentioned control information transport part when sending from control information that above-mentioned vehicle machine receives, sends with the given cycle,
In the time of the given multiple that is equivalent to the above-mentioned cycle, not when switching hub receives control information, judge that the in-vehicle network that is connected with this switching hub breaks down.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004149296A JP4227556B2 (en) | 2004-05-19 | 2004-05-19 | Information transmission system |
| JP2004149296 | 2004-05-19 |
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| Publication Number | Publication Date |
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| CN1700632A true CN1700632A (en) | 2005-11-23 |
| CN100413243C CN100413243C (en) | 2008-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100521404A Expired - Fee Related CN100413243C (en) | 2004-05-19 | 2005-02-25 | Information transmission system |
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| Country | Link |
|---|---|
| JP (2) | JP4227556B2 (en) |
| KR (1) | KR100730055B1 (en) |
| CN (1) | CN100413243C (en) |
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| CN102843444A (en) * | 2012-09-12 | 2012-12-26 | 上海富欣智能交通控制有限公司 | Method for applying wireless priority based on IP (internet protocol) address in train control system |
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| CN109565475A (en) * | 2016-08-08 | 2019-04-02 | 三菱电机株式会社 | Transmitting device, system control device, train Transmission system and transmission method |
| CN110036603A (en) * | 2016-12-15 | 2019-07-19 | 住友电气工业株式会社 | Switch, communication control method and communication control program |
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| CN106740997A (en) * | 2016-12-27 | 2017-05-31 | 河南思维信息技术有限公司 | A kind of multi-locomotive information synchronization system and method |
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| CN112099464B (en) * | 2019-06-17 | 2024-04-05 | 现代自动车株式会社 | Communication method of Ethernet for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005333724A (en) | 2005-12-02 |
| JP2009077412A (en) | 2009-04-09 |
| JP4227556B2 (en) | 2009-02-18 |
| CN100413243C (en) | 2008-08-20 |
| JP4856687B2 (en) | 2012-01-18 |
| KR100730055B1 (en) | 2007-06-20 |
| KR20060042400A (en) | 2006-05-12 |
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