CN112087351B - Remote train network communication interface testing method - Google Patents
Remote train network communication interface testing method Download PDFInfo
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- CN112087351B CN112087351B CN202011015641.6A CN202011015641A CN112087351B CN 112087351 B CN112087351 B CN 112087351B CN 202011015641 A CN202011015641 A CN 202011015641A CN 112087351 B CN112087351 B CN 112087351B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The utility model provides a remote train network communication interface test method, which relates to the field of train communication interface test.A corresponding industrial network test environment is built by each subsystem according to the respective equipment environment requirement; the industrial network and the train network control system corresponding to each subsystem are respectively accessed to a public network gateway through nodes, and all the nodes establish a virtual local area network in the public network through respective gateways to carry out data transmission; any node receives data sent by other nodes for judgment and filtration, and data conforming to a system corresponding to the node is obtained; the system comprises a plurality of subsystems, a test communication interface, a master node, a train network control system, a virtual local area network, a network structure and a remote test system, wherein the subsystems are used for transmitting signals to each other, the test communication interface automatically builds an industrial network test environment through the subsystems, then the master node is accessed into a public network, the train network control system is accessed into the public network through the master node in a matching mode, the network structure with the top layer as the public network and the lower layer as the industrial network is built, the remote test is supported, and the existing requirement for the train network communication interface test is met.
Description
Technical Field
The disclosure relates to the field of train communication interface testing, in particular to a remote train network communication interface testing method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
A train network control system (TCMS) is one of core systems of rail transit vehicles, a train traction system, a brake system, a vehicle door system and the like are used as subsystems of the TCMS to be connected to a TCMS bus, and a vehicle control unit is used for unified management and control to jointly form a complex vehicle-mounted industrial computer network. In the TCMS, a vehicle control unit is provided by a TCMS manufacturer as a network master node, and other devices such as a traction control unit, a brake control unit, a door control unit, etc. are provided by a traction manufacturer, a brake manufacturer, a door manufacturer, etc. as network child nodes. The sub-nodes need to carry out interaction of various data information, such as train traction data, brake data, driver operation data information and the like, and the accuracy of data transmitted by the information through the TCMS industrial network becomes the premise of realizing the TCMS function, so that a communication interface test is needed. The communication interface test is an interface test before the train network control system is installed, and aims to ensure that the communication among subsystems of the train is normal and the basic operation function of the train and the safety of the train are related.
In a conventional TCMS communication interface test, a TCMS manufacturer or a vehicle manufacturer usually serves as a leading party and notifies a function-related party to go to an appointed test site for testing, if a traction function is notified to the TCMS manufacturer for testing, a brake function is notified to the TCMS manufacturer for testing, and if a vehicle door function is notified to the TCMS manufacturer for testing, the vehicle door manufacturer is notified to the vehicle door manufacturer for testing. And technicians of a test manufacturer carry respective communication equipment to an appointed test site, conditions such as power supply, communication cables, debugging equipment and the like are configured according to the working requirements of the equipment, and the test technicians carry out communication interface tests according to a communication interface protocol. In the test work of the communication interface, the quality and the efficiency of the test work of the communication interface are directly influenced by the time coordination of technical personnel of a subsystem manufacturer, the incomplete external working environment of communication equipment, the environmental conditions of a test place and the like.
When organizing the communication interface test, the manufacturer participating in the test first consults to determine the test site and the preliminary test scheme; then, the test participating manufacturers test at the appointed time and place; finally, forming a test report, and testing the signature confirmation of both parties.
The inventor finds that the traditional TCMS communication interface testing method faces various problems of inconsistent local testing and actual system testing states caused by difficult time coordination, incomplete external environment of communication equipment, influence on the communication equipment caused by environmental conditions of testing places, difficulty in carrying out integrated testing of all access systems and the like; the number of participating manufacturers for testing the TCMS communication interface is usually more than 6, and the coordination of the testing work among a plurality of manufacturers is difficult, so that the efficiency of the testing work is greatly influenced; because the peripheral equipment is difficult to carry, the peripheral environment of the communication equipment is not completely built during testing, the testing environment of a testing place is difficult to be consistent with the operating environment required by the communication equipment of each manufacturer, the testing result is adversely affected, and the requirement of the existing network communication interface testing is difficult to meet.
Disclosure of Invention
The purpose of the disclosure is to provide a remote train network communication interface test method aiming at the defects in the prior art, an industrial network test environment is built by each subsystem, then a public network is accessed through a main node, and a network structure with a top layer of a virtual local area network of the public network and a lower layer of the industrial network is built by matching with a train network control system accessed into the public network through the main node, so that remote test is supported, and the existing requirement for the train network communication interface test is met.
In order to realize the purpose, the following technical scheme is adopted:
a remote train network communication interface test method comprises the following steps:
each subsystem builds a corresponding industrial network test environment according to the respective equipment environment requirement;
the industrial network and the train network control system corresponding to each subsystem are respectively accessed to a public network gateway through nodes, and all the nodes establish a virtual local area network in the public network through respective gateways to carry out data transmission;
any node receives data sent by other nodes for judgment and filtration, and data conforming to a system corresponding to the node is obtained;
the systems send signals to each other and test the communication interface.
Furthermore, the industrial network test environment is built through the communication interface equipment and the industrial network simulation master node equipment, and the protocol configuration of the industrial network test environment is consistent with that of the train network control system.
Furthermore, the industrial network simulation master node and the train network control system master node jointly form a master node industrial network, and the master node industrial network can support the master node to simulate communication with child nodes in the train network control system.
Furthermore, the industrial network simulation master node is connected with the public network gateway, the vehicle control unit of the train network control system is used as the master node of the train network control system and is connected with the public network gateway, and the industrial network protocol and the public network protocol are converted through the gateway.
Furthermore, a main gateway of the virtual local area network is located in the train network control system, and data is transmitted in the virtual local area network.
Furthermore, data sent by any node is forwarded to other nodes, and after receiving the data, the nodes filter the data according to the protocol address and judge whether the received data needs to be processed by the node.
And further, the data is transmitted to the subsystem and the train network control system through the public network, the subsystem converts the data into industrial network data through the gateway after acquiring the data, performs filtering judgment, and forwards the data meeting the requirements to the communication equipment in the industrial network of the system for processing.
Further, the train network control system receives the data, converts the data into industrial network data through the gateway, and sends the data meeting the requirements to the train network control system main node.
Further, after the subsystem and the train network control system are accessed to the public network, a network structure is formed, wherein the top layer is a virtual local area network of the public network, and the lower layer is an industrial network.
Furthermore, all subsystem communication equipment is in the industrial network, data sent by each subsystem are transmitted to target equipment through a two-layer network, signals are sent among the subsystems, and whether a communication interface accords with the design or not is tested.
Compared with the prior art, the utility model has the advantages and positive effects that:
(1) an industrial network test environment is built by each subsystem, then a public network is accessed through a main node, and a network structure with a top layer being a virtual local area network of the public network and a lower layer being the industrial network is built by matching with a train network control system accessed into the public network through the main node, so that remote test is supported, and the requirement of the existing train network communication interface test is met;
(2) and remotely connecting subsystem-level industrial networks scattered in each subsystem manufacturer by using a public network VPN (virtual private network) technology for testing a remote communication interface. The problems of difficult communication coordination, difficult carrying of communication equipment and the like in the traditional communication interface test can be solved;
(3) by adopting a one-to-many data transmission mode, the node corresponding to each subsystem can receive the data sent by other subsystems, then the data are filtered, the data meeting the requirements are accepted, the data not meeting the requirements are filtered and not processed, and therefore the data transmission of a plurality of subsystems in the virtual local area network is achieved, and the requirement of remote test data transmission can be met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a network structure diagram of a remote communication interface test in embodiment 1 of the present disclosure;
fig. 2 is a data frame structure in embodiment 1 of the present disclosure;
fig. 3 is a schematic diagram of a network communication interface test flow in embodiment 1 of the present disclosure;
fig. 4 is a schematic diagram of data flow in a test process in embodiment 1 of the present disclosure.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as introduced in the background art, in the prior art, the TCMS performs interface tests with various subsystem manufacturers one by one, and the problems of large time coordination difficulty of test technicians, low efficiency, deviation of test results due to the fact that peripheral equipment of communication equipment cannot be carried, large influence on test environment of a tested place and the like exist, so that the existing requirements for network communication interface tests are difficult to meet; in order to solve the problem, the disclosure provides a remote train network communication interface testing method.
In a conventional TCMS communication interface test, a TCMS manufacturer or a vehicle manufacturer usually serves as a leading party and notifies a function-related party to go to an appointed test site for testing, if a traction function is notified to the TCMS manufacturer for testing, a brake function is notified to the TCMS manufacturer for testing, and if a vehicle door function is notified to the TCMS manufacturer for testing, the vehicle door manufacturer is notified to the vehicle door manufacturer for testing. And technicians of a test manufacturer carry respective communication equipment to an appointed test site, conditions such as power supply, communication cables, debugging equipment and the like are configured according to the working requirements of the equipment, and the test technicians carry out communication interface tests according to a communication interface protocol. In the test work of the communication interface, the quality and the efficiency of the test work of the communication interface are directly influenced by the time coordination of technical personnel of a subsystem manufacturer, the incomplete external working environment of communication equipment, the environmental conditions of a test place and the like.
The providers of the central control unit or the vehicle control unit are hereinafter referred to as networks, the systems of traction, braking, doors, air conditioners, fire alarms, passenger information and the like are hereinafter referred to as subsystems, and the specifications of the communication interfaces of the train network are hereinafter referred to as interface specifications.
Example 1
In an exemplary embodiment of the present disclosure, as shown in the figure, a method for testing a remote train network communication interface is provided.
A platform is established for the communication test of the TCMS by utilizing a computer network technology, and is used for supporting remote test and the like, so that the problems in the traditional TCMS interface test are solved;
the method comprises four steps of industrial network environment construction, subsystem access, public network transmission and remote test:
firstly, industrial network environment construction is carried out: each subsystem builds an industrial network test environment of the subsystem according to the equipment environment requirements of the respective system, and the test environment comprises communication equipment, a subsystem industrial network, an industrial network simulation host node, a communication equipment peripheral environment and the like. Wherein the content of the first and second substances,
the communication equipment is communication interface equipment of each subsystem and the TCMS, and if the TCMS is an MVB bus, the communication interface equipment is an MVB subnode;
the subsystem industrial network is a small subsystem TCMS industrial network, the protocol configuration of the subsystem industrial network is consistent with that of the TCMS, but the equipment only consists of communication interface equipment and an industrial network simulation main node;
the industrial network simulation main node is main node equipment in the subsystem industrial network and is used for simulating the communication between the subsystem and the main node in the actual TCMS;
the TCMS main node and the industrial network simulation sub-node jointly form a main node industrial network which is used for simulating the communication between the main node and the sub-node in the actual TCMS.
And secondly, subsystem access is carried out: after the industrial network environment is built, connecting an industrial network simulation main node with an Ethernet gateway, converting an industrial network protocol and a public network protocol by the gateway, and accessing the industrial network to the public network;
for the TCMS leading party, because the vehicle control unit is the TCMS main node, the conversion between the industrial network and the public network needs to be completed through the industrial network simulation sub-node and the Ethernet gateway, and then the system access is performed through the Ethernet gateway;
all nodes establish a virtual local area network VPN in a public network through respective VPN gateways, a VPN main gateway is positioned at a TCMS test head-leading party, and data is transmitted in the VPN.
And then carrying out public network transmission: the TCMS participates in the data transmission of internal broadcasting between the gateways of all parties, namely, the data transmitted by any node is forwarded to all other TCMS participants, all parties filter the data according to the protocol address after receiving the data, and whether the received data needs to be processed by the node is judged.
Data is transmitted to other participating parties of TCMS communication interface test through a public network, wherein the participating parties comprise a subsystem party and a TCMS head-leading party;
after receiving the data, the subsystem side converts the public network data into industrial network data through the gateway, performs data filtering according to the protocol address, judges whether the data is the current subsystem data, if the data is the current subsystem address, forwards the data to the industrial network simulation main node through the gateway, the industrial network simulation main node forwards the received data in the subsystem industrial network, and forwards the data to the communication equipment for processing;
after receiving the data, the TCMS head-pulling party converts the public network data into industrial network data through the gateway, performs data filtering according to the protocol address, judges whether the received data is the local data, and directly sends the local data to the TCMS main node if the local data is the local data.
And finally, carrying out communication interface test: after all the systems are accessed to the public network, the systems establish a set of data system through the public network, the top layer is a virtual local area network of the public network, and the lower layer is an industrial network;
and in a subsystem level, all subsystem communication equipment is in an industrial network, data sent by each subsystem is transmitted to target equipment through two layers of networks, and system technicians send signals to test whether a communication interface conforms to the design or not.
The method for testing the remote vertical lathe network communication interface in the embodiment is described in detail with reference to the accompanying drawings:
as shown in fig. 1, a network architecture diagram of a telecommunication interface test method;
each subsystem builds a VPN network on the public network through a VPN gateway, each subsystem communication device and an industrial network simulation main node form a local industrial network, the local industrial network builds connection with the public network through an Ethernet gateway and the VPN gateway so as to transmit data among TCMS system manufacturers through the VPN, and each system completes remote connection of the industrial network through the public network and is used for carrying out remote communication tests.
The structure can be divided into five layers, wherein the first layer of public network is Internet; the second layer virtual private network VPN, VPN is tested by TCMS and all the participants are built together, and the third party VPN service can be directly adopted; the third layer is each subsystem Ethernet, which is used for establishing connection with VPN and converting industrial network data into Ethernet data; the fourth layer is an industrial network which is respectively built by all participants, the sub-nodes need one simulation main node for networking, and the main node needs one simulation sub-node for networking; and the fifth layer is a subsystem peripheral environment which is used for providing a complete peripheral equipment environment for the child node communication equipment.
As shown in fig. 2, the transmission mode and data frame structure of the remote industrial network are as follows: the data transmission mode among all nodes is a broadcast mode;
the data information consists of a public network information head, an Ethernet information head, an industrial network information head and industrial network data, the public network information head consists of a TCP/IP information head and a VPN information head, the Ethernet information head is the TCP/IP information head of each participant local area network, and the industrial network information head consists of a sending equipment address, a target equipment address, a start bit offset and sending time;
the data type is determined by the specific data frame type of the industrial network, such as the MVB network comprises process data and message data, such as the CAN network comprises PDO and SDO data; the functions of the data information comprise inquiry, control, feedback and the like, and the applicable data types are adopted according to the industrial network protocol; the length of the data frame is in accordance with the TCP/IP data protocol requirements.
The industrial network data and the industrial network information head are packaged for the first time and are marked as packaging data 1; the packaging data 1+ the Ethernet information head is packaged for the second time and is marked as packaging data 2; the encapsulation data 2+ public network information head is encapsulated for the third time and is marked as public network data; and the industrial network data is converted into public network data for transmission through three times of encapsulation.
As shown in fig. 3, the test procedure of the TCMS interface test is as follows:
firstly, establishing connection including VPN connection, Ethernet connection and industrial network connection; secondly, the TCMS main node sends periodic inquiry data to determine the online state of each child node;
then, under the condition that the equipment is on line, the TCMS main node sends interface data to the child nodes, and interface tests of the main node sending and the child nodes receiving the data are carried out;
then, the sub-node sends interface data to the TCMS main node, and interface tests of the sub-node sending and the main node receiving data are carried out;
finally, the sub-node is disconnected, the TCMS main node checks whether the data of the sub-node exists on the network, if so, the conflict is checked and the test is carried out again, and if not, the test is finished;
in the testing process, once the equipment is not on line, the equipment is immediately finished at the current testing item point, and after the equipment is on line again, the continuous testing is continued from the last finishing item point.
As shown in fig. 4, the data flow of the TCMS remote test is:
firstly, the TCMS main node sends out industrial network data, and the data are sent to the simulation child nodes;
after the analog sub-node receives the industrial network data, an industrial network information head is added, recorded as encapsulation data 1 and provided for an Ethernet gateway;
after the Ethernet gateway receives the encapsulated data 1, an Ethernet information header of the local network is added, recorded as encapsulated data 2 and provided for the VPN gateway;
after receiving the encapsulated data 2, the VPN gateway adds a public network information head, records the public network information head as public network data, sends the public network data through the VPN gateway after encapsulation, and transmits the public network data in a broadcasting mode in the VPN network;
after receiving the data, the VPN gateway of the child node unpacks the data, removes the information head of the public network and sends the data to the Ethernet gateway of the child node;
the Ethernet gateway of the child node analyzes the data again, removes the Ethernet information head and sends the data to the industrial network simulation main node;
and the industrial network simulation master node finally analyzes the data, extracts an industrial network information head, reads a sending equipment address and a target equipment address in the industrial network information head, judges the target equipment address, and sends the data without the industrial network information head to the sub-node communication equipment if the target equipment is in the sub-system industrial network.
The method comprises the steps that the path of data sent by a main node to a sub-node is consistent, after industrial network data sent by a TCMS main node is received by sub-node communication equipment, the data are responded, feedback data are sent, an industrial network information head is packaged through a simulation main node, an Ethernet information head is packaged through an Ethernet gateway, a public network information head is packaged through a VPN gateway, after the data are received by the VPN gateway of the TCMS main node, the public network information head is removed and sent to the Ethernet gateway, the Ethernet gateway removes the Ethernet information head and sends the Ethernet information head to the simulation sub-node, the simulation sub-node analyzes the industrial network information head to judge whether the data are received, and the received data are sent to the communication equipment of the TCMS main node.
And remotely connecting subsystem-level industrial networks scattered in each subsystem manufacturer by using a public network VPN (virtual private network) technology for testing a remote communication interface. The problems that communication coordination is difficult, communication equipment is not easy to carry and the like in the traditional communication interface test can be solved.
Example 2
In another exemplary embodiment of the present disclosure, another remote train communication interface test method is provided, which is different from embodiment 1 in the connection manner of the subsystem participant and the virtual area network.
In this embodiment, the industrial network corresponding to the subsystem is accessed to the public network by the node cooperating with the client, so as to realize the connection with the virtual area network;
and (3) building a VPN server on the TCMS test leading party by adopting a client-gateway VPN mode, and connecting VPN by other participants through the client to realize remote connection transmission between the industrial networks.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (6)
1. A remote train network communication interface test method is characterized by comprising the following steps:
each subsystem builds a corresponding industrial network test environment according to the respective equipment environment requirement; the industrial network test environment is set up through communication interface equipment and industrial network simulation main node equipment, the protocol configuration of the industrial network test environment is consistent with that of a train network control system, the industrial network simulation sub-nodes and the train network control system main node jointly form a main node industrial network, and the industrial network simulation sub-nodes can support the train network control system main node to simulate communication with sub-nodes in the train network control system; the industrial network and the train network control system corresponding to each subsystem are respectively accessed to a public network gateway through nodes, and all the nodes establish a virtual local area network in the public network through respective gateways to carry out data transmission; after the subsystem and the train network control system are accessed to a public network, a network structure is formed, wherein the top layer is a virtual local area network of the public network, and the lower layer is an industrial network;
any node receives data sent by other nodes for judgment and filtration, and data conforming to a system corresponding to the node is obtained; the method specifically comprises the following steps: the data sent by any node is forwarded to other nodes, the nodes filter the data according to the protocol address after receiving the data, and whether the received data needs to be processed by the node is judged;
the systems send signals to each other and test the communication interface.
2. The remote train network communication interface test method of claim 1, wherein the industrial network simulation master node is connected to a public network gateway, and a vehicle control unit of the train network control system is connected to the public network gateway as its master node, and the industrial network protocol and the public network protocol are converted by the gateway.
3. The method as claimed in claim 2, wherein the virtual lan master gateway is located in the train network control system, and data is transmitted in the virtual lan.
4. The method for testing the remote train network communication interface of claim 1, wherein the data is transmitted to the subsystem and the train network control system through a public network, the subsystem obtains the data, converts the data into industrial network data through a gateway, performs filtering judgment, and forwards the data meeting the requirements to the communication equipment in the industrial network of the system for processing.
5. The method of claim 4, wherein the train network control system receives the data, converts the data into industrial network data through the gateway, and sends the data meeting the requirements to the train network control system master node.
6. The method of claim 1, wherein all subsystem communication devices are in an industrial network, data transmitted by each subsystem is transmitted to a target device through a two-layer network, and the systems transmit signals to each other to test whether the communication interface conforms to a design.
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