CN111030911A - Train network system and terminal equipment access management method for train network system - Google Patents

Train network system and terminal equipment access management method for train network system Download PDF

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Publication number
CN111030911A
CN111030911A CN201811173939.2A CN201811173939A CN111030911A CN 111030911 A CN111030911 A CN 111030911A CN 201811173939 A CN201811173939 A CN 201811173939A CN 111030911 A CN111030911 A CN 111030911A
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port
control
ethernet switching
ports
switching device
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CN111030911B (en
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唐军
殷建华
宁振钧
刘文超
李思源
陈仲海
尹君
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CRRC Zhuzhou Institute Co Ltd
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CRRC Zhuzhou Institute Co Ltd
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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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention relates to a train network system and a terminal device access management method used for the train network system, wherein the train network system comprises a plurality of Ethernet switching devices, a control terminal device and a non-control terminal device, each Ethernet switching device comprises a plurality of ports which are respectively connected with the adjacent Ethernet switching device, the control terminal device and the non-control terminal device, and the control terminal device is based on TRDP message communication, wherein the method comprises the following steps: each Ethernet switching device periodically sends a backbone port detection message through all ports of the Ethernet switching device; all ports of the network are set as non-control network special ports; periodically detecting whether a trunk port detection message or a TRDP message is received; changing the port receiving the trunk port detection message into a trunk port; after receiving the TRDP message, judging whether the port receiving the TRDP message is a trunk port, if not, changing the port into a special port of the control network.

Description

Train network system and terminal equipment access management method for train network system
Technical Field
The invention relates to the technical field of rail transit industry communication, in particular to a train network system and a terminal device access management method for the train network system.
Background
In a train network based on the ethernet technology, the vehicle-mounted terminal devices can be roughly divided into two types, one type is a control terminal device for short, which participates in train control, and the other type is a terminal device unrelated to train control, which is a non-control terminal device for short. For example, the advancing, accelerating, decelerating, braking and the like of the train are all completed by control terminal equipment, and the operations of lighting, vehicle doors, air conditioners and the like are all completed by non-control terminal equipment.
The importance of communication of the control terminal device is obviously higher than that of the non-control terminal device, however, the control terminal device and the non-control terminal device are physically communicated with each other in the train network system, that is, the two types of terminal devices are in the same ethernet communication domain. This may cause "damage" that the non-control terminal device may cause to the control terminal device, such as an ARP (Address Resolution Protocol) attack, and the like. Once the train network system is attacked by ARP, the whole train network system will be broken down if it is serious, and the train will be out of control. Especially for trains running at high speed, if the trains are out of control, the safety of personnel on the trains can be seriously endangered, and immeasurable loss is caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a train network system and a terminal device access management method for the train network system, and the system or the method logically isolates control terminal devices and non-control terminal devices in the same Ethernet communication domain on a train, so that the non-control terminal devices are prevented from causing damage to the control terminal devices, and the safe operation of the train network system is ensured.
According to an aspect of the present invention, there is provided a terminal device access management method for a train network system, where the train network system includes a plurality of ethernet switching devices, a control terminal device and a non-control terminal device, each ethernet switching device includes a plurality of ports, and each ethernet switching device is connected to an adjacent ethernet switching device, the control terminal device and the non-control terminal device, and the control terminal device performs communication based on a TRDP packet, where the method includes:
each Ethernet switching device periodically sends a backbone port detection message through all ports of the Ethernet switching device;
each Ethernet switching device sets all ports thereof as non-control network special ports;
each Ethernet switching device periodically detects whether the trunk port detection message or the TRDP message is received or not;
each Ethernet switching device sets the port change receiving the backbone port detection message as a backbone port; and
after each Ethernet switching device receives the TRDP message, whether a port receiving the TRDP message is the trunk port is judged, and if not, the port is changed and set as a special port of a control network. In an embodiment, the method further comprises:
after all the ports of each Ethernet switching device are set as the non-control network special ports, the priority of the non-control network special ports is set to be the lowest.
In an embodiment, each ethernet switching device can only receive the backbone port detection packet sent by the ethernet switching device adjacent to the ethernet switching device.
In one embodiment, the control terminal equipment comprises terminal equipment for controlling the advancing, accelerating, decelerating and braking of the train, and the non-control terminal equipment comprises terminal equipment for controlling train illumination, vehicle doors and air conditioners.
In an embodiment, the method further comprises:
and each Ethernet switching device sets the backbone port as a control network public port and a non-control network public port.
According to another aspect of the present invention, there is provided a train network system, comprising a plurality of ethernet switching devices, and a control terminal device and a non-control terminal device, each ethernet switching device comprising a plurality of ports for connecting with adjacent ethernet switching devices and the control terminal device and the non-control terminal device, respectively, the control terminal device performing communication based on a TRDP packet,
wherein each Ethernet switching device is configured to:
periodically sending a trunk port detection message through all ports of the trunk port detection message;
all ports of the network are set as non-control network special ports;
periodically detecting whether the trunk port detection message or the TRDP message is received or not;
changing the port receiving the trunk port detection message into a trunk port; and
and after receiving the TRDP message, judging whether the port receiving the TRDP message is the trunk port or not, and if not, changing the port into a special port of a control network.
In an embodiment, each ethernet switching device is further configured to:
after all the ports are set as the special ports of the non-control network, the priority of the special ports of the non-control network is set as the lowest.
In an embodiment, each ethernet switching device can only receive the backbone port detection packet sent by the ethernet switching device adjacent to the ethernet switching device.
In one embodiment, the control terminal equipment comprises terminal equipment for controlling the advancing, accelerating, decelerating and braking of the train, and the non-control terminal equipment comprises terminal equipment for controlling train illumination, vehicle doors and air conditioners.
In an embodiment, each ethernet switching device is further configured to:
and setting the trunk port as a control network public port and a non-control network public port.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
by applying the train network system and the terminal device access management method for the train network system provided by the embodiment of the invention, the control terminal device and the non-control terminal device in the same Ethernet communication domain are arranged in two different VLANs, so that the logical isolation of the control terminal device and the non-control terminal device is realized, the damage of the non-control terminal device to the control terminal device is avoided, and the safety of the train network system is improved.
In addition, the system and the method provided by the invention are suitable for various network topologies. Moreover, the system and the method provided by the invention can automatically finish the isolation of the control terminal equipment and the non-control terminal equipment based on the sending and the detection of different types of messages. Even if a new terminal device is accessed, the newly accessed terminal device can be automatically allocated to the VLAN where the terminal device with the same type is located, and dynamic configuration of the VLAN is realized. Compared with the manual static VLAN configuration, the dynamic VLAN configuration shortens the time required by configuration, improves the working efficiency, avoids manual errors and ensures the accuracy of VLAN configuration.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a topology of a train network system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a terminal device access management method for a train network system according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details or with a specific implementation described herein.
As described above, in order to solve the technical problem in the prior art that a non-control terminal device may cause "damage" to a control terminal device in the same ethernet communication domain, an embodiment of the present invention provides a train network system.
Fig. 1 is a schematic diagram of a topology of a train network system according to an embodiment of the present invention. As shown in fig. 1, the train network system includes a plurality of ethernet switching devices, a plurality of control-class terminal devices, and a plurality of non-control-class terminal devices. In fig. 1, a1-a6 are ethernet switches, and the ethernet switches a1-a6 are connected to adjacent ethernet switches via ports 1 and 2, and constitute a backbone for ethernet communication. The ED11, ED12 and ED13 are control type terminal devices of the train, and the advancing, accelerating, decelerating, braking and the like of the train are all controlled by the control type terminal devices. The ED21, ED22 and ED23 are non-control type terminal equipment of the train, and the operation of lighting, doors, air conditioners and the like is completed by the non-control type terminal equipment.
In order to make an embodiment of the present invention clearer, each ethernet switching device in fig. 1 only gives 3 ports, and only 6 ethernet switching devices, 3 control-class terminal devices, and 3 non-control-class terminal devices are given. It is clear to those skilled in the art that each ethernet switch device may have a different number of ports, and the entire train network system may include a different number of ethernet switch devices, control-type terminal devices, and non-control-type terminal devices, but the present invention is not limited thereto. In addition, in an embodiment of the present invention, in order to better distinguish the control terminal device from the non-control terminal device, the port of the ethernet switching device to which the control terminal device is connected is labeled as port 3, and the port of the ethernet switching device to which the non-control terminal device is connected is labeled as port 4. However, it is clear to those skilled in the art that the ports 3 and 4 may be the same, in practice, there is no distinction between the ports 3 and 4 on the ethernet switch device, and the same ethernet switch device may be connected to a plurality of control terminal devices and a plurality of non-control terminal devices at the same time, and the present invention is not limited thereto.
As shown in fig. 1, control class end devices ED11, ED12, and ED13 are connected to port 3 on ethernet switching devices a1, A3, and a5, respectively. The non-control terminal devices ED21, ED22, and ED23 are connected to ports 4 on ethernet switching devices a2, a4, and a6, respectively. The control terminal equipment ED11-ED13 and the non-control terminal equipment ED21-ED23 are in the same Ethernet communication domain.
Since the control terminal devices ED11-ED13 and the non-control terminal devices ED21-ED23 are in the same ethernet communication domain and are physically connected with each other, the non-control terminal devices ED21-ED23 may cause "damage" to the control terminal devices ED11-ED13, such as ARP attack, and further may cause the breakdown of the entire train network system, resulting in traffic accidents.
Therefore, the train network system provided by the invention realizes the logical isolation of the control terminal equipment and the non-control terminal equipment by arranging the control terminal equipment and the non-control terminal equipment in the same Ethernet communication domain into two different VLANs. The specific process is as follows:
and after the control terminal equipment and the non-control terminal equipment are connected to the port of the Ethernet switching equipment, powering on the train network system.
After the system is powered on, the ethernet switching devices a1-a6 periodically send trunk port detection messages through all ports on the devices. All the ports include a port 3 where the ethernet switching device is connected with the control terminal device, a port 4 where the ethernet switching device is connected with the non-control terminal device, and also include a port 1 and a port 2 where the ethernet switching devices are connected with each other.
In the process of sending the trunk port detection message by the Ethernet switching equipment, the trunk port detection message is only sent and received between the adjacent Ethernet switching equipment. In other words, each ethernet switching device cannot send the trunk port detection packet to the non-adjacent ethernet switching device, and cannot receive the trunk port detection packet sent by the non-adjacent ethernet switching device. For example, the ethernet switching device a2 may send the detection packet to a1 and A3, and may receive the detection packets of a1 and A3, but may not receive the backbone port detection packets of a4, a5, and a 6. Therefore, hardware transparent transmission can be effectively prevented.
In one embodiment of the invention, all ports on each ethernet switching device are initially set to non-control network dedicated ports. At this time, the ethernet switching device, the control terminal device and the non-control terminal device are all in the non-control VLAN. In addition, after all ports on the ethernet switching device are set as non-control-network-dedicated ports, the ethernet switching device adjusts the priority of the non-control-network-dedicated ports to the lowest.
In the rail transit industry, the control terminal device performs Train communication based on a TRDP (Train Real-time data protocol) message, that is, whether the TRDP message is detected can be used as a criterion for the control terminal device.
Next, each ethernet switching device periodically detects whether a trunk port detection packet or a TRDP packet is received. The Ethernet switching equipment sets the port change of the received backbone port detection message as a backbone port. The trunk port is set as a control network public port and a non-control network public port. For example, taking the ethernet switching device a2 as an example, a2 periodically detects whether a backbone port detection packet is received. Assuming that a2 receives a trunk port detection message sent by a1 through port 1, port 1 is changed from a non-control network dedicated port to be set as a trunk port, and meanwhile, the trunk port is set as a control VLAN and a non-control VLAN common port. By analogy, since all ethernet switching devices receive the trunk port detection packet sent by the adjacent ethernet switching device, the ports 1 and 2 on all ethernet switching devices are set as trunk ports.
In an embodiment of the present invention, since the control terminal device performs communication based on the TRDP packet, all ethernet switching devices connected to the control terminal device receive the TRDP packet. After each Ethernet switching device receives the TRDP message, whether the port receiving the TRDP message is a trunk port is judged, and if not, the port is changed and set as a special port of a control network. On the contrary, if the ethernet switching device determines that the port receiving the TRDP packet is the trunk port, the port type is not changed, that is, the port is still maintained as the trunk port. This is because the TRDP messages may also be transmitted between different ethernet switching devices via the trunk ports 1 and 2.
For example, taking the ethernet switching device a5 as an example, assuming that the port a5 receives a TRDP message sent by the control-class end device ED13 through the port 3, the ethernet switching device a5 determines whether the port 3 that receives the TRDP message is a trunk port. The judgment result is as follows: if the port 3 is not a trunk port, the port 3 is changed from the non-control network dedicated port to the control network dedicated port. In this way, since all the ethernet switching devices connected to the control type end devices receive the TRDP messages, the ports 3 of the control type end devices ED11-ED13 connected to the ethernet switching devices are all changed to be dedicated ports of the control network, so that the control type end devices ED11-ED13 are all in the control VLAN. Because the non-control terminal device does not send out the TRDP packet, the port 4 where the non-control terminal device is connected to the ethernet switch device is still a non-control network dedicated port, and further the non-control terminal devices ED21-ED23 are still in the non-control VLAN.
Therefore, after the system is stabilized, the control end devices ED11-ED13 and the non-control end devices ED21-ED23 in fig. 1 are located in two different VLANs, so that the control end devices and the non-control end devices are logically isolated.
In one embodiment of the invention, the priority of the non-control net dedicated port is adjusted to be the lowest. That is, the priority of the port to which the non-control class terminal device is connected to the ethernet switching device is adjusted to the lowest. The purpose of this is that, when the operating memory of the CPU of the ethernet switching device is saturated, for example, the CPU of the ethernet switching device can only process information of 10 messages simultaneously, and at this time, the total number of messages sent by the control terminal device and the non-control terminal device is greater than the operating capacity of the CPU of the ethernet switching device, for example, 12 messages, the ethernet switching device can process the messages sent by the ports with high priority in priority according to the order of the port priority, that is, it is ensured that the CPU of the ethernet switching device processes the messages sent by the control terminal device in priority.
In an embodiment of the present invention, based on the transmission and detection of two different types of messages (trunk port detection message and TRDP message), the ports on the ethernet switching device are divided into three types of ports, i.e., a control network dedicated port, a non-control network dedicated port, and a control network and non-control network common port, and the control terminal device and the non-control terminal device are divided into different VLANs, so that logical isolation between the control terminal device and the non-control terminal device is achieved. In addition, even if a new terminal device is accessed, the terminal device can be automatically allocated to the VLAN where the terminal device with the same type is located according to the type of the message sent by the terminal device, and the dynamic configuration of the VLAN is realized.
Correspondingly, the embodiment of the invention also provides a terminal device access management method for a train network system, wherein the train network system comprises a plurality of Ethernet switching devices, control terminal devices and non-control terminal devices, each Ethernet switching device comprises a plurality of ports which are respectively connected with the adjacent Ethernet switching devices, the control terminal devices and the non-control terminal devices, and the control terminal devices communicate based on TRDP messages. Fig. 2 is a flowchart illustrating a terminal device access management method for a train network system according to an embodiment of the present invention.
As shown in fig. 2, the terminal device access management method for a train network system includes:
step 201: each ethernet switching device periodically sends a backbone port detection packet through all ports of the ethernet switching device.
Step 202: each ethernet switching device sets all its ports as non-control network dedicated ports.
Step 203: and each Ethernet switching device periodically detects whether the trunk port detection message or the TRDP message is received.
Step 204: and each Ethernet switching device sets the port change receiving the backbone port detection message as a backbone port.
Step 205: after each Ethernet switching device receives the TRDP message, whether a port receiving the TRDP message is the trunk port is judged, and if not, the port is changed and set as a special port of a control network.
On the contrary, if the ethernet switching device determines that the port receiving the TRDP packet is the trunk port, the port type is not changed, that is, the port is still maintained as the trunk port. This is because the TRDP messages may also be transmitted between different ethernet switching devices through the backbone port.
In an embodiment of the present invention, step 201 and step 202 may be performed simultaneously, or step 202 may be performed first and then step 201 is performed, but the present invention is not limited thereto.
In one embodiment, after each ethernet switching device sets all its ports as non-control-network-dedicated ports, the priority of the non-control-network-dedicated ports is set to be the lowest.
In an embodiment, each ethernet switching device can only receive the backbone port detection packet sent by the ethernet switching device adjacent to the ethernet switching device.
In one embodiment, the control terminal equipment comprises terminal equipment for controlling the advancing, accelerating, decelerating and braking of the train, and the non-control terminal equipment comprises terminal equipment for controlling train illumination, vehicle doors and air conditioners.
In an embodiment, the method further comprises:
and each Ethernet switching device sets the backbone port as a control network public port and a non-control network public port.
As shown in fig. 2, a delay function is set for both the process of sending the trunk port detection packet in step 201 and the process of detecting whether the trunk port detection packet or the TRDP packet is received in step 203. That is, the processes of sending the trunk port detection packet in step 201 and detecting whether the trunk port detection packet or the TRDP packet is received in step 203 are periodic. Therefore, the occupation of the running memory of the CPU in the Ethernet switching equipment can be reduced, and the access of the terminal equipment can be automatically managed, thereby realizing the dynamic configuration of the VLAN.
In summary, by applying the train network system and the terminal device access management method for the train network system provided by the embodiment of the present invention, the control terminal device and the non-control terminal device in the same ethernet communication domain are set in two different VLANs, so that the control terminal device and the non-control terminal device are logically isolated, thereby preventing the non-control terminal device from causing "damage" to the control terminal device, and improving the security of the train network system.
In addition, the system and the method provided by the invention are suitable for various network topologies. Moreover, the invention can automatically finish the isolation of the control terminal device and the non-control terminal device based on the sending and the detection of different types of messages, and can automatically distribute the newly accessed terminal device to the VLAN where the terminal device with the same type is located even if a new terminal device is accessed, thereby realizing the dynamic configuration of the VLAN. Compared with the manual static VLAN configuration, the dynamic VLAN configuration shortens the time required by configuration, improves the working efficiency, avoids manual errors and ensures the accuracy of VLAN configuration.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular process steps or materials disclosed herein, but rather, are extended to equivalents thereof as would be understood by those of ordinary skill in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "an embodiment" means that a particular feature, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "an embodiment" appearing in various places throughout the specification are not necessarily all referring to the same embodiment.
It will be appreciated by those of skill in the art that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A terminal device access management method for a train network system, the train network system including a plurality of Ethernet switch devices and control terminal devices and non-control terminal devices, each Ethernet switch device including a plurality of ports for respectively connecting with adjacent Ethernet switch devices and control terminal devices and non-control terminal devices, the control terminal devices communicating based on TRDP messages, wherein the method includes:
each Ethernet switching device periodically sends a backbone port detection message through all ports of the Ethernet switching device;
each Ethernet switching device sets all ports thereof as non-control network special ports;
each Ethernet switching device periodically detects whether the trunk port detection message or the TRDP message is received or not;
each Ethernet switching device sets the port change receiving the backbone port detection message as a backbone port; and
after each Ethernet switching device receives the TRDP message, whether a port receiving the TRDP message is the trunk port is judged, and if not, the port is changed and set as a special port of a control network.
2. The method of claim 1, wherein the method further comprises:
after all the ports of each Ethernet switching device are set as the non-control network special ports, the priority of the non-control network special ports is set to be the lowest.
3. The method according to claim 1, wherein each ethernet switching device can only receive the trunk port detection packet sent by its neighboring ethernet switching device.
4. The method of claim 1, wherein the control class terminal devices include terminal devices for controlling train progress, acceleration, deceleration, and braking, and the non-control class terminal devices include terminal devices for controlling train lighting, door doors, and air conditioning.
5. The method of claim 1, wherein the method further comprises:
and each Ethernet switching device sets the backbone port as a control network public port and a non-control network public port.
6. A train network system comprises a plurality of Ethernet switching devices, control terminal devices and non-control terminal devices, wherein each Ethernet switching device comprises a plurality of ports which are respectively connected with the adjacent Ethernet switching devices, the control terminal devices and the non-control terminal devices, the control terminal devices communicate based on TRDP messages,
wherein each Ethernet switching device is configured to:
periodically sending a trunk port detection message through all ports of the trunk port detection message;
all ports of the network are set as non-control network special ports;
periodically detecting whether the trunk port detection message or the TRDP message is received or not;
changing the port receiving the trunk port detection message into a trunk port; and
and after receiving the TRDP message, judging whether the port receiving the TRDP message is the trunk port or not, and if not, changing the port into a special port of a control network.
7. The train network system of claim 6, wherein each Ethernet switching device is further configured to:
after all the ports are set as the special ports of the non-control network, the priority of the special ports of the non-control network is set as the lowest.
8. The train network system according to claim 6, wherein each Ethernet switch device can only receive the trunk port detection message sent by the Ethernet switch device adjacent to the Ethernet switch device.
9. The train network system according to claim 6, wherein the control type terminal devices include terminal devices for controlling train progress, acceleration, deceleration, and braking, and the non-control type terminal devices include terminal devices for controlling train lighting, door, and air conditioning.
10. The train network system of claim 6, wherein each Ethernet switching device is further configured to:
and setting the trunk port as a control network public port and a non-control network public port.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101702679A (en) * 2009-11-26 2010-05-05 福建星网锐捷网络有限公司 Message processing method and exchange apparatus based on virtual local area network
US20160173325A1 (en) * 2014-12-11 2016-06-16 Elbit Systems Of America, Llc Ring-based network interconnect
CN107172101A (en) * 2017-07-13 2017-09-15 无锡路通视信网络股份有限公司 Port isolation and VLAN isolation switching methods and application in an epon
CN108092854A (en) * 2017-12-29 2018-05-29 中国铁道科学研究院 The test method and device of train grade ethernet device based on IEC61375 agreements

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101702679A (en) * 2009-11-26 2010-05-05 福建星网锐捷网络有限公司 Message processing method and exchange apparatus based on virtual local area network
US20160173325A1 (en) * 2014-12-11 2016-06-16 Elbit Systems Of America, Llc Ring-based network interconnect
CN107172101A (en) * 2017-07-13 2017-09-15 无锡路通视信网络股份有限公司 Port isolation and VLAN isolation switching methods and application in an epon
CN108092854A (en) * 2017-12-29 2018-05-29 中国铁道科学研究院 The test method and device of train grade ethernet device based on IEC61375 agreements

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