CN112054932A - Train TCMS configuration management method based on software defined network - Google Patents
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Abstract
The invention provides a train TCMS configuration management method based on an SDN, belonging to the technical field of train communication and comprising the following steps: receiving configuration information from a configuration computer; issuing a software defined network control instruction according to the configuration information; receiving response information fed back by the train terminal equipment after attribute configuration is carried out on the train terminal equipment according to the software defined network control instruction; confirming the received response information, and issuing a starting working instruction after confirming that the configuration information of all the equipment is consistent with the issued configuration information so that the train terminal starts to work normally after receiving the starting working instruction, and entering a formal running state by the TCMS; in the TCMS operation process, a network state query instruction is issued periodically; receiving self network state information responded by the train terminal equipment according to the network state query instruction; and evaluating the network state according to the network state information. The invention realizes the function configuration and the equipment monitoring of each equipment on the TCMS through a unified control platform.
Description
Technical Field
The invention relates to the technical field of train communication, in particular to a train TCMS configuration management method based on a software defined network.
Background
TCMS (Train Control and Management System) is similar to the nervous System of a Train, and implements Control and monitoring functions of the Train through hardware devices of the System and software logic of a central Control unit.
Currently, in-vehicle Ethernet communication uses process data and message data communication conforming to IEC61375-2-3 standard, each on-board device address uses a preset static IP address, and each on-board device communicates according to a pre-designed communication protocol. And the vehicle-mounted Ethernet switch performs port configuration (ring network configuration, interface attribute configuration and the like) according to network design requirements.
Therefore, all devices in a TCMS (Train Control and Management System) must pre-configure the functions implemented by the devices according to the requirements of the project, including the application programs of the devices that need to be developed according to the requirements of the project; after the project requirements change, some equipment needs to modify the configuration or change the program; when the communication problem occurs in the network, the problem needs to be searched through the cooperation of the personnel of a switch manufacturer, and the problem is difficult to locate.
Disclosure of Invention
In view of this, the present invention provides a train TCMS configuration management method based on a software defined network, so as to implement function configuration of each device on the TCMS through a unified control platform, and solve the above technical problems.
In order to achieve the above object, the following solutions are proposed:
a train TCMS configuration management method based on a software defined network is applied to a train central control unit of a train head in the train TCMS, and the train configuration management method comprises the following steps:
receiving configuration information from a configuration computer;
issuing a software defined network control instruction according to the configuration information;
receiving response information fed back by the train terminal equipment after attribute configuration is carried out on the train terminal equipment according to the software defined network control instruction;
confirming the received response information, and issuing a starting working instruction after confirming that the configuration information of all the equipment is consistent with the issued configuration information, so that the train terminal starts to work normally after receiving the starting working instruction, and the TCMS enters a formal running state;
in the running process of the TCMS, periodically issuing a network state query instruction;
receiving self network state information responded by the train terminal equipment according to the network state query instruction;
and evaluating the network state according to the network state information.
Preferably, after the network status evaluation according to the network status information, the method further includes:
storing the evaluation result into a database, and executing problem corresponding operation on the problematic train terminal equipment, wherein the problem corresponding operation at least comprises the following steps: restarting the equipment, and reporting the equipment fault information and the grade to a display screen.
Preferably, when receiving configuration information from a configuration computer in the running process of the TCMS, before issuing a software-defined network control instruction according to the configuration information, the method further includes: and issuing a work stopping instruction.
Preferably, the content of the network control instruction at least includes: the information for performing IP setting on any of the train terminal devices at least includes: the train terminal equipment comprises a multicast message IP address, a port, a ComID, a message length and a message content which need to be received by the train terminal equipment, a multicast message IP address, a port, a ComID, a message length and a message content which need to be sent by the train terminal equipment, a unicast message IP address, a port, a ComID, a message length and a message content which need to be received by the train terminal equipment, and a unicast message IP address, a port, a ComID, a message length and a message content which need to be sent by the train terminal equipment;
information for configuring any switch, comprising: configuration port setting and QoS setting of any train two-layer gateway switch, and setting of UUID in Ethernet train backbone nodes are defined in IEC61375-2-3 and IEC 61375-2-5;
and configuring the port monitoring and fault detection information uploading mode.
Preferably, the network state evaluation according to the network state information includes:
and if the network state information returned by the equipment shows that the equipment is the new access equipment, sending a software defined network control instruction containing the configuration information of the equipment to the new access equipment.
Preferably, the train central control unit of each train is a redundant structure and comprises a master train central control unit and a slave train central control unit, and the configuration method is executed by the master train central control unit of the train head.
Preferably, the network status information includes at least: the number of lost messages and the running time of the equipment responded by the train terminal equipment; the number of the incoming and outgoing messages of each port and the occupation condition of each port responded by the switch.
Preferably, the evaluating the network status according to the network status information includes:
and performing network state evaluation by using a fault prediction and health management application program in the central control unit of the train.
In the train TCMS configuration management method based on the software defined network, 1, each device on the TCMS realizes the function configuration of the device through a unified control platform, and the application program or the configuration file of the device is not required to be repeatedly modified due to different projects; 2. the requirement can be realized only by changing the configuration file of the main control unit after the project requirement is changed; 3. the equipment monitoring is realized through a uniform control platform, the equipment problem or the wiring problem can be found in time, and the problem that the problem point is not well positioned when the network fails is solved; 4. the terminal equipment of the TCMS can adopt the design concept of the most complete function coverage to realize the communication protocol with other equipment, namely the message receiving and sending content of the equipment is the most complete function which can be processed and provided by the equipment, and each project can use the data in the communication protocol according to the project requirement, so that the terminal equipment does not need to modify programs in most projects, and can work only according to the configuration which is issued to the equipment by a main control unit in the project.
The invention has the following beneficial effects:
1. the TCMS realizes the function configuration of the equipment through a unified control platform, and the application programs or configuration files of the equipment are not repeatedly modified due to different items. For devices with the same function, such as a CCU (central control unit) or a TCU (traction control unit) or a BCU (brake control unit) or a gate controller, only a piece of software needs to be developed according to the software and hardware capability of the software, and the received data content and the transmitted data content of the software can be determined. For different projects, the device can work corresponding to a specific project only after the main CCU sends a configuration file which indicates which data the device needs to process and how to communicate with other devices through a software-defined network control instruction. Software does not need to be modified every time, technicians are dispatched to carry out technical communication, and the technicians are dispatched to a field for debugging, so that the labor cost and the financial expenditure of a company are greatly reduced.
2. The unified configuration function of the network is defined through software, equipment is replaced on site only by setting a dial switch without downloading different programs every time, equipment manufacturers do not need to send after-sales personnel to the site, and the equipment manufacturers can finish work after sales by purchasing manufacturers, so that the cost of the equipment manufacturers is reduced, the on-site working efficiency is improved, and the working intensity of the on-site personnel is reduced (some equipment assembly positions are not beneficial to the program downloading of workers, and the program can take a long time to update once and can be blown by wind and sun).
3. Network state information of each device, particularly information counted by the switches, is acquired through the software defined network, faults can be found in advance through logic judgment of the CCU, and train operation risks are reduced; for the faults which have already occurred, the fault points can be located or the fault range can be given, so that the difficulty of finding the faults can be reduced.
4. As the CCU has the communication capacity with all equipment and the network state statistical capacity, PHM (fault prediction and health management) application can be introduced, so that the stable operation capacity of the system is improved, the service life of the system is prolonged, the operation risk is reduced, and the product competitiveness is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a SDN-based TCMS in an embodiment of the present invention;
fig. 2 is a schematic flowchart of a train TCMS configuration management method based on SDN according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a TCMS structure according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Software Defined Networking (SDN), a new Network innovation architecture proposed by the american university of stanford clean slate research group, has a core technology OpenFlow that separates the control plane in routers and switches from the data plane, which is open and centrally controlled, while sending commands and logic back to the data plane of the hardware. Therefore, the flexible control of the network flow is realized, and a good platform is provided for the innovation of the core network and the application.
The invention aims to design a train TCMS configuration management method based on an SDN, and the scheme realizes system configuration and equipment management of the train TCMS on the basis of the SDN technology.
Referring to fig. 1, a schematic diagram of a SDN-based TCMS structure in an embodiment of the present invention is shown. The TCMS structure includes:
a train central control unit CCU, train terminal equipment ED, a train two-layer network management switch ECN and an Ethernet train backbone node ETBN in each train section;
wherein, the CCU is an SDN controller; ED is an SDN terminal; both ECN and ETBN act as SDN switches. According to different projects, the ECNs and the ETBN used by a train are different in quantity, the networking modes are different, and finally, the whole train communication network is formed by the switches to connect the CCU and the EDs.
Referring to fig. 2, a flow of a train TCMS configuration management method based on an SDN in an embodiment of the present invention is shown. The method comprises the following steps:
and S1, receiving the configuration information from the configuration computer.
In specific implementation, project configuration software is used on a configuration computer to configure all the CCUs in a project (the CCUs may be configured in a redundant control manner, so that a slave CCU may be upgraded to a master CCU when a master CCU fails, and the original master CCU may be recovered by restarting), an ethernet switch, and other ED devices, and generate configuration information. The configuration computer is then connected to the CCU and configuration information is downloaded to the CCU using project configuration software.
The TCMS is connected according to project requirements, when the TCMS is powered on, the switch starts a DHCP Server function, and the ED device starts a DHCP Client function (if the static IP is configured according to the control instruction, the DHCP Client function is closed).
The CCU configures own IP according to own ID setting (different main CCU and auxiliary CCU are distinguished by dial switch setting) and configuration information; the switches automatically sort according to the position relation between the switches and the main CCU and the default path of the switch ring network; the ED device identifies its own features based on its ID setting (dial switch setting) and the location of the ECN in which it is located, e.g. the ED is the traction control unit TCU1 under vehicle 1 or the ED is the brake control unit BCU2 under vehicle 3.
And S2, the CCU issues an SDN control instruction according to the received/downloaded configuration information.
The content of the SDN control instruction comprises: the IP setting for any ED may specifically include: the multicast message IP address, the port, the ComID, the message length and the message content which the ED needs to receive, the multicast message IP address, the port, the ComID, the message length and the message content which the ED needs to send, the unicast message IP address, the port, the ComID, the message length and the message content which the ED needs to receive, the unicast message IP address, the port, the ComID, the message length and the message content which the ED needs to send and the like. The content of the SDN control instructions further includes: information for configuring any switch, comprising: the ETBN equipment also comprises related attributes such as the setting of UUID and the like defined in IEC61375-2-3 and IEC 61375-2-5. The content of the SDN control instruction further includes setting of port monitoring and fault detection information uploading modes in the SDN control layer. The content of the SDN control instruction may further include other configuration information, which is not specifically limited herein.
After receiving an SDN control instruction issued by a main CCU to the equipment except the main CCU in the TCMS network, the equipment carries out attribute configuration on the equipment, and then feeds back response information to the main CCU.
And S3, the CCU receives response information fed back by each device after the device performs attribute configuration on the device according to the SDN control instruction.
And S4, confirming the received response information, and issuing a work starting instruction after confirming that the configuration information of all the devices is consistent with the issued configuration information.
And when the main CCU receives the response information of each device for confirmation, and after confirming that the configuration information of all the devices is consistent with the issued configuration information, the main CCU considers that the SDN configuration work is completed. The main CCU issues a starting work instruction, other equipment of the TCMS network starts to work normally after receiving the instruction, and the TCMS enters a formal running state.
When new configuration information is downloaded to the main CCU, the main CCU issues a work stopping instruction, then issues the new configuration information to the corresponding equipment, and when the main CCU receives response information of the corresponding equipment, the main CCU sends a work starting instruction, and the TCMS network enters a formal running state again.
And S5, periodically issuing a network state query instruction in the TCMS operation process.
The main CCU periodically issues a network state query control instruction in the working operation process, and all slave devices (including the slave CCUs, the switch and other ED) in the TCMS respond to the network state information after receiving the instruction (the ED device responds to the number of lost messages of the device and the operation time, and the switch responds to the number of incoming and outgoing messages of each port and the payment occupation condition of each port).
And S6, the CCU receives the self network state information responded by the train terminal equipment according to the network state inquiry instruction.
And S7, the CCU carries out network state evaluation according to the received network state information.
And the main CCU evaluates the network state according to the received response information, stores the evaluation result into a database, and executes problem corresponding operation (such as restarting the equipment and reporting the fault information and the grade of the equipment to a display screen) on the equipment with the problem.
For convenience of understanding, the SDN based train TCMS management method according to the present invention is described below by taking specific items as examples.
Referring to fig. 3, a schematic structural diagram of a TCMS of a train according to an embodiment of the present invention is shown.
Taking a train composed of 4 trains as an example, each train has an ETBN switch, which can implement the train composition function. The ETBN1 and the ETBN4 are symmetrical structures, and the ECN1-ECN4 form a ring network and then are connected to the ETBN, so that the double-line redundancy design is realized. When the ETBN1 is used as a locomotive to normally operate, the CCU1 under the ETBN1 is used as a main device, and the CCU2 under the ETBN1, the CCU1 under the ETBN4 and the CCU2 are all used as slave devices. When the ETBN4 is used as a locomotive to normally operate, the CCU1 under the ETBN4 is used as a main device, and the CCU2 under the ETBN4, the CCU1 under the ETBN1 and the CCU2 are all used as slave devices. The ECN device connects a plurality of ED devices, each having a different function, such as controlling traction devices, controlling brake devices, controlling air conditioning, controlling driver displays, controlling vehicle doors, etc. The ETBN2 and the ETBN3 are positioned in train carriages, so that the equipment is less, and an ECN ring network structure is not generally used.
Before factory shipment, all devices with the same function download general factory software, for example, a CCU downloads the same control software and configuration files of the items, a TCU (traction-controlling ED device) downloads the same version of traction control software, a BCU (brake-controlling ED device) downloads the same version of brake control software, and a Door controller (Door-controlling ED device) downloads the same version of Door control software.
After the equipment is installed at a specific position of a train, according to the function of project design, different equipment is set according to the designed equipment serial number (the same serial number of the equipment can be realized by inputting a group of hardware on the equipment).
After the hardware installation, the wiring and the dial setting are finished, the power can be supplied to work.
After the ETBN is electrified, the initial operation is carried out according to the standard requirements of IEC61375-2-5 and IEC61375-2-3, and after the initial operation is finished, the CCU can communicate with the ETBN to obtain the train operation direction to determine which ETBN is the train head position, thereby determining which CCU is the main CCU.
After the main CCU determines that the configuration information is issued to the ETBN, the ECN, the slave CCU and the ED by the main CCU through the SDN control instruction, when the SDN response information returned to the main CCU by all the equipment is confirmed to be passed, the main CCU sends out a starting operation instruction, and the TCMS enters a normal working state.
In the normal working process, the main CCU periodically sends SDN control instructions for inquiring the network state, each device sends the network state counted by the device to the main CCU, the main CCU judges faults and potential faults according to internal judgment rules and records the faults and the potential faults into a database, important faults are sent and displayed to a driver display screen to be displayed on the driver display screen in time, so that a driver knows the important faults, and if the faults affect the running of a train, the faults are processed in time.
After later power-on, the main CCU does not carry out unified configuration, only sends an SDN query instruction to judge whether the network is complete, and only sends the SDN configuration instruction to the equipment if SDN response information returned by the equipment shows that the equipment is new access equipment.
The SDN-based train TCMS configuration management method in the embodiment of the invention has the following beneficial effects:
1. for devices with the same function, such as a CCU (central control unit) or a TCU (traction control unit) BCU (brake control unit) or a door controller, only one piece of software needs to be developed according to the software and hardware capability of the software, and the receiving data content and the sending data content of the software can be determined. For different projects, the device can work corresponding to a specific project only after the main CCU sends a configuration file of which data needs to be processed and how to communicate with other devices to the device through the SDN control instruction. The company does not need to modify software, send technicians to carry out technical communication and send the technicians to a field for debugging every time, so that the labor cost and the financial expenditure of the company are greatly reduced.
2. The SDN is used for uniformly configuring functions, the field replacement equipment only needs to be provided with a dial switch, different programs do not need to be downloaded at each time, an equipment manufacturer does not need to send after-sales personnel to the field, the after-sales personnel of a purchasing manufacturer can complete work, the cost of the equipment manufacturer is reduced, the field work efficiency is improved, and the working intensity of the field personnel is reduced (some equipment assembly positions are not beneficial to the program downloading of workers, and the time spent on updating the programs once can be long and the programs can be blown to the sun).
3. Network state information of each device, especially information counted by the switches, is obtained through the SDN, faults can be found in advance through logic judgment of the CCU, and train operation risks are reduced; for the faults which have already occurred, the fault points can be located or the fault range can be given, so that the difficulty of finding the faults can be reduced.
4. As the CCU has the communication capacity with all equipment and the network state statistical capacity, PHM (fault prediction and health management) application can be introduced, so that the stable operation capacity of the system is improved, the service life of the system is prolonged, the operation risk is reduced, and the product competitiveness is improved.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A train TCMS configuration management method based on a software defined network is applied to a train central control unit of a train head in the train TCMS, and the train configuration management method comprises the following steps:
receiving configuration information from a configuration computer;
issuing a software defined network control instruction according to the configuration information;
receiving response information fed back by the train terminal equipment after attribute configuration is carried out on the train terminal equipment according to the software defined network control instruction;
confirming the received response information, and issuing a starting working instruction after confirming that the configuration information of all the equipment is consistent with the issued configuration information, so that the train terminal starts to work normally after receiving the starting working instruction, and the TCMS enters a formal running state;
in the running process of the TCMS, periodically issuing a network state query instruction;
receiving self network state information responded by the train terminal equipment according to the network state query instruction;
and evaluating the network state according to the network state information.
2. The method of claim 1, wherein after the evaluating the network status according to the network status information, further comprising:
storing the evaluation result into a database, and executing problem corresponding operation on the problematic train terminal equipment, wherein the problem corresponding operation at least comprises the following steps: restarting the equipment, and reporting the equipment fault information and the grade to a display screen.
3. The method of claim 1, wherein when receiving configuration information from a configuration computer during the TCMS operation, before issuing software-defined network control commands according to the configuration information, the method further comprises: and issuing a work stopping instruction.
4. The method according to claim 1, wherein the content of the network control command at least comprises: the information for performing IP setting on any of the train terminal devices at least includes: the train terminal equipment comprises a multicast message IP address, a port, a ComID, a message length and a message content which need to be received by the train terminal equipment, a multicast message IP address, a port, a ComID, a message length and a message content which need to be sent by the train terminal equipment, a unicast message IP address, a port, a ComID, a message length and a message content which need to be received by the train terminal equipment, and a unicast message IP address, a port, a ComID, a message length and a message content which need to be sent by the train terminal equipment;
information for configuring any switch, comprising: configuration port setting and QoS setting of any train two-layer gateway switch, and setting of UUID in Ethernet train backbone nodes are defined in IEC61375-2-3 and IEC 61375-2-5;
and configuring the port monitoring and fault detection information uploading mode.
5. The method of claim 1, wherein performing network status evaluation based on the network status information comprises:
and if the network state information returned by the equipment shows that the equipment is the new access equipment, sending a software defined network control instruction containing the configuration information of the equipment to the new access equipment.
6. The method of claim 1, wherein the train central control unit of each train is a redundant structure including a master train central control unit and a slave train central control unit, and the configuration method is performed by the master train central control unit of the locomotive.
7. The method of claim 1, wherein the network state information comprises at least: the number of lost messages and the running time of the equipment responded by the train terminal equipment; the number of the incoming and outgoing messages of each port and the occupation condition of each port responded by the switch.
8. The method of claim 1, wherein the performing network state evaluation according to the network state information comprises:
and performing network state evaluation by using a fault prediction and health management application program in the central control unit of the train.
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| CN111416725A (en) * | 2019-01-07 | 2020-07-14 | 上海申通地铁集团有限公司 | System and method for updating configuration of network equipment in train information network |
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| US20140207923A1 (en) * | 2013-01-21 | 2014-07-24 | Tellabs Oy | Method and a controller system for controlling a software-defined network |
| CN105703960A (en) * | 2016-04-25 | 2016-06-22 | 刘昱 | Network function management system based on SDN and method thereof |
| CN111416725A (en) * | 2019-01-07 | 2020-07-14 | 上海申通地铁集团有限公司 | System and method for updating configuration of network equipment in train information network |
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