CN109040332B - Train control Ethernet addressing method and system - Google Patents
Train control Ethernet addressing method and system Download PDFInfo
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- CN109040332B CN109040332B CN201810730644.4A CN201810730644A CN109040332B CN 109040332 B CN109040332 B CN 109040332B CN 201810730644 A CN201810730644 A CN 201810730644A CN 109040332 B CN109040332 B CN 109040332B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/30—Managing network names, e.g. use of aliases or nicknames
- H04L61/3005—Mechanisms for avoiding name conflicts
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
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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 invention relates to the technical field of communication, and discloses a train control Ethernet addressing method and a train control Ethernet addressing system, which are used for avoiding adverse effects of IP address conflict on system communication. The method comprises the following steps: distributing a unique domain port number in a train control system and a unique domain port number in the whole network for the train control node accessed to the Ethernet; establishing a topological relation among the domain port numbers and broadcasting the topological relation to each switch of the Ethernet; in a data packet sent by a source node in the train control system, domain port numbers of the source node and a destination node are written in an extension field of a packet header; in the transmission process of the data packet, before the switch capable of analyzing the domain port number in the train control system analyzes the IP source address and the destination address, whether the domain port numbers of the active node and the destination node are filled in the extension field is judged, and after the judgment result is yes, the mapping relation is searched by the analyzed domain port numbers so as to carry out corresponding data forwarding; at the same time, the IP forwarding policy for the packet is terminated.
Description
Technical Field
The invention relates to the technical field of train control system communication, in particular to a train control Ethernet addressing method and system.
Background
In a communication system, a conventional ethernet addressing mode generally adopts a MAC address at a link layer and an IP address at an IP layer, however, IP address collision is a common communication fault.
In the train control system, due to the complexity of the associated system, once the IP addresses conflict, the troubleshooting is difficult, the whole network is possibly broken down, and the train is easy to stop running. The existing self-healing mechanism can only be used for specific few situations, and the application range is limited.
Disclosure of Invention
The invention aims to disclose a train control Ethernet addressing method and a train control Ethernet addressing system, which are used for avoiding adverse effects on system communication caused by IP address conflict.
In order to achieve the aim, the invention discloses a train control Ethernet addressing method, which comprises the following steps:
distributing a unique domain port number in a train control system and a unique domain port number in the whole network for the train control node accessed to the Ethernet;
establishing a topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises a mapping relation between each node domain port number and an MAC address;
in a data packet sent by a source node in the train control system, after the IP address setting of an Ethernet packet header is completed, domain port numbers of the source node and a destination node are written in an extension field of the packet header, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; then, data packet sending is carried out based on the timestamp configuration information of the domain port whole network synchronization;
in the transmission process of the data packet, before the switch capable of analyzing the domain port number in the train control system analyzes the IP source address and the IP destination address, judging whether the domain port numbers of the active node and the destination node are filled in the extension field, and searching the mapping relation by using the analyzed domain port numbers to forward corresponding data after the judgment result is yes; and at the same time, terminating the IP forwarding strategy of the data packet.
As a variation, the present invention also discloses another train control ethernet addressing method, including:
distributing a unique domain port number in a train control system and a unique domain port number in the whole network for the train control node accessed to the Ethernet;
establishing a topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises a mapping relation between each node domain port number and an MAC address;
in a data packet sent by a source node in the train control system, after the IP address setting of an Ethernet packet header is completed, domain port numbers of the source node and a destination node are written in an extension field of the packet header, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; then, data packet sending is carried out based on the timestamp configuration information of the domain port whole network synchronization;
in the transmission process of the data packet, after judging that an IP address conflict exists in the switch capable of analyzing the domain port number, judging whether the domain port numbers of the active node and the destination node are filled in the extension field, and searching the mapping relation by using the analyzed domain port number to forward corresponding data after the judgment result is yes; and at the same time, terminating the IP forwarding strategy of the data packet.
Corresponding to the method, the invention also discloses a train control Ethernet addressing system, which comprises:
the terminal node comprises a source node and a destination node; and an intermediate node between the source node and the destination node, the intermediate node comprising a switch capable of resolving the domain port number; in the topological structure of the system, unique domain port numbers in the train control system and unique in the whole network are distributed for train control nodes accessed into the Ethernet, a topological relation among the domain port numbers is established and broadcasted to all switches of the Ethernet, and the topological relation comprises a mapping relation between the domain port numbers of all nodes and MAC addresses;
the source node is used for writing domain port numbers of the source node and the destination node into an extension field of the packet header after the IP address of the Ethernet packet header is set in the sent data packet, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; then, data packet sending is carried out based on the timestamp configuration information of the domain port whole network synchronization;
the switch capable of resolving the domain port number is used for firstly judging whether the domain port numbers of the active node and the destination node are filled in the extension field before resolving the IP source address and the destination address or after judging that the IP address conflict exists in the transmission process of the data packet, and searching the mapping relation by using the resolved domain port numbers to forward corresponding data after judging that the domain port numbers are yes; and at the same time, terminating the IP forwarding strategy of the data packet.
The invention has the following beneficial effects:
the data forwarding can be actively or passively carried out based on the domain port number, so that the adverse effect of IP address conflict on system communication is avoided to the greatest extent.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a train control Ethernet addressing method in accordance with a preferred embodiment of the present invention;
fig. 2 is a flow chart of another train control ethernet addressing method in accordance with a preferred embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example 1
The embodiment discloses a train control ethernet addressing method, as shown in fig. 1, including:
and step S11, distributing the unique domain port number in the train control system and the unique domain port number in the whole network for the train control node accessed to the Ethernet.
In this step, the domain port number is an identifying number assigned to each node in the train control ethernet system, each number corresponds to one unique address information of the whole network, and in order to distinguish the address information from the IP address, the domain port number is defined as a domain port in the present invention. For ease of understanding, the "domain port" of the present invention can be considered as: the second IP address in the train control system defined by the software and hardware resources based on the ethernet general purpose or train control system special purpose is unique from the local area network corresponding to the existing IP address, the second IP is unique in the whole network, and the allocation technology related to the second IP includes but is not limited to being realized based on the latest block chain technology. Optionally, the domain port number of this embodiment may be fixed or dynamically updated in synchronization at a specific time based on the same specific algorithm.
Step S12, establishing the topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises the mapping relation between each node domain port number and the MAC address.
In this step, the MAC address is set when the network card leaves the factory, and has global uniqueness like the identification number on our identification card. Therefore, in this embodiment, the MAC address and the domain port number appear in pairs, the MAC address is responsible for representing the data link layer address of the computer, and the domain port number is used for representing the second IP address unique to the whole network.
Step S13, after the IP address of the Ethernet packet header is set, domain port numbers of the source node and the destination node are written in the extension field of the packet header in the data packet sent by the source node in the train control system, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; and then, sending the data packet based on the timestamp configuration information of the domain port whole network synchronization. In this embodiment, the domain port list and the sending time interval of each node in the whole network may be generated by a configuration tool, and clock synchronization of the whole network is performed to avoid data collision between the domain ports.
In this step, the domain port number is used for ciphertext transmission, and in the same way, the related encryption can be processed by adopting the block chain technology, so as to effectively avoid adverse effects of network attacks on the security and stability of the system.
Step S14, in the transmission process of the data packet, before the switch capable of resolving the domain port number in the train control system resolves the IP source address and the destination address, firstly, judging whether the domain port numbers of the active node and the destination node are filled in the extension field, and after the judgment result is yes, searching the mapping relation by the resolved domain port numbers to forward the corresponding data; and at the same time, terminating the IP forwarding strategy of the data packet.
On the other hand, if the domain port numbers of the source node and the destination node are not filled in the extension field or the domain port number analysis error is judged, the data processing is still carried out by using the IP forwarding strategy.
In addition, in this step, after receiving the data packet carrying the domain port information, other switches without domain port processing capability forward the data packet to the switch capable of resolving the domain port number for corresponding processing.
In conclusion, the method of the embodiment can actively forward data based on the domain port number, thereby avoiding adverse effects of IP address conflicts on system communication to the greatest extent.
Example 2
Corresponding to the above embodiment 1, this embodiment discloses a train control ethernet addressing system, including: the terminal node comprises a source node and a destination node; and an intermediate node between the source node and the destination node, the intermediate node comprising a switch capable of resolving the domain port number.
In the topology structure of the system of this embodiment, a unique domain port number in the train control system and a unique domain port number in the whole network are allocated to a train control node accessed to the ethernet, a topology relationship between the domain port numbers is established and broadcasted to each switch of the ethernet, and the topology relationship includes a mapping relationship between each node domain port number and an MAC address.
The source node is used for writing domain port numbers of the source node and the destination node into an extension field of the packet header after the IP address of the Ethernet packet header is set in the sent data packet, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; and then, sending the data packet based on the timestamp configuration information of the domain port whole network synchronization.
The system of this embodiment further includes the switch capable of resolving the domain port number, and is configured to, during transmission of the data packet, before resolving the IP source address and the destination address, determine whether the domain port numbers of the active node and the destination node are filled in the extension field, and if the determination result is yes, search the mapping relationship for corresponding data forwarding using the resolved domain port number; and at the same time, terminating the IP forwarding strategy of the data packet. In another aspect, the switch is further configured to: and when the domain port numbers of the source node and the destination node are not filled in the extension field or the domain port number analysis errors are judged, the data processing is still carried out by using an IP forwarding strategy.
In this embodiment, the related terminal node and the destination node may use a dedicated chip to perform data processing related to the domain port, and may define a dedicated data frame structure and a processing mechanism for the domain port based on the dedicated chip resource, so as to further improve system performance such as real-time performance, flexibility, and security of data processing. In other words, the system of the present embodiment is equivalent to a large general-purpose ethernet network that customizes a dedicated internal network suitable for a train control system based on part of the special software and hardware resources of the nodes and the data processing mechanism, so as to avoid IP address conflicts and improve the overall performance of the internal network.
Similarly, the system of the embodiment can actively forward data based on the domain port number, thereby avoiding adverse effects on system communication caused by IP address conflict to the greatest extent.
Example 3
The embodiment discloses a train control ethernet addressing method, as shown in fig. 2, including:
and step S21, distributing the unique domain port number in the train control system and the unique domain port number in the whole network for the train control node accessed to the Ethernet.
Step S22, establishing the topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises the mapping relation between each node domain port number and the MAC address.
Step S23, after the IP address of the Ethernet packet header is set, domain port numbers of the source node and the destination node are written in the extension field of the packet header in the data packet sent by the source node in the train control system, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; and then, sending the data packet based on the timestamp configuration information of the domain port whole network synchronization.
Steps S21 to S23 are similar to steps S11 to S13 in embodiment 1 and will not be described in detail.
Step S24, in the transmission process of the data packet, if the switch capable of resolving the domain port number judges that there is an IP address conflict, judging whether the domain port numbers of the active node and the destination node are filled in the extension field, and after the judgment result is yes, searching the mapping relation by the resolved domain port number to forward the corresponding data; and at the same time, terminating the IP forwarding strategy of the data packet. On the other hand, if the switch judges that no IP address conflict exists, the data processing is still carried out by using the IP forwarding strategy.
In summary, the method of the embodiment can passively forward data based on the domain port number, thereby avoiding adverse effects of IP address conflicts on system communication to the greatest extent.
Example 4
Corresponding to the above embodiment 3, this embodiment discloses a train control ethernet addressing system, including: the terminal node comprises a source node and a destination node; and an intermediate node between the source node and the destination node, the intermediate node comprising a switch capable of resolving the domain port number.
In the topology structure of the system of this embodiment, a unique domain port number in the train control system and a unique domain port number in the whole network are allocated to a train control node accessed to the ethernet, a topology relationship between the domain port numbers is established and broadcasted to each switch of the ethernet, and the topology relationship includes a mapping relationship between each node domain port number and an MAC address.
The source node is used for writing domain port numbers of the source node and the destination node into an extension field of the packet header after the IP address of the Ethernet packet header is set in the sent data packet, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; and then, sending the data packet based on the timestamp configuration information of the domain port whole network synchronization.
The switch capable of resolving the domain port number is used for firstly judging whether the domain port numbers of the active node and the destination node are filled in the extension field after judging that the IP address conflict exists in the transmission process of the data packet, and searching the mapping relation by the resolved domain port number to forward corresponding data after the judgment result is yes; and at the same time, terminating the IP forwarding strategy of the data packet. In another aspect, the switch is further configured to: and after judging that the IP address conflict does not exist, still using an IP forwarding strategy to perform data processing.
Similarly, the system of the embodiment can passively forward data based on the domain port number, thereby avoiding adverse effects on system communication caused by IP address conflict to the greatest extent.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A train control ethernet addressing method, comprising:
distributing a unique domain port number in a train control system and a unique domain port number in the whole network for the train control node accessed to the Ethernet; each domain port number respectively corresponds to one unique address information of the whole network;
establishing a topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises a mapping relation between each node domain port number and an MAC address;
in a data packet sent by a source node in the train control system, after the IP address setting of an Ethernet packet header is completed, domain port numbers of the source node and a destination node are written in an extension field of the packet header, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; then, data packet sending is carried out based on the timestamp configuration information of the domain port whole network synchronization;
in the transmission process of the data packet, before the switch capable of analyzing the domain port number in the train control system analyzes the IP source address and the IP destination address, judging whether the domain port numbers of the active node and the destination node are filled in the extension field, and searching the mapping relation by using the analyzed domain port numbers to forward corresponding data after the judgment result is yes; and at the same time, terminating the IP forwarding strategy of the data packet.
2. The train control ethernet addressing method according to claim 1, further comprising:
and when the domain port numbers of the source node and the destination node are not filled in the extension field or the domain port number analysis errors are judged, the data processing is still carried out by using an IP forwarding strategy.
3. A train control ethernet addressing system, comprising:
the terminal node comprises a source node and a destination node; and an intermediate node between the source node and the destination node, the intermediate node comprising a switch capable of resolving the domain port number; in the topological structure of the system, unique domain port numbers in the train control system and unique in the whole network are distributed for train control nodes accessed to the Ethernet, and each domain port number corresponds to unique address information in the whole network; establishing a topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises a mapping relation between each node domain port number and an MAC address;
the source node is used for writing domain port numbers of the source node and the destination node into an extension field of the packet header after the IP address of the Ethernet packet header is set in the sent data packet, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; then, data packet sending is carried out based on the timestamp configuration information of the domain port whole network synchronization;
the switch capable of resolving the domain port number is used for judging whether the domain port numbers of the active node and the destination node are filled in the extension field or not before resolving the IP source address and the destination address in the transmission process of the data packet, and searching the mapping relation by the resolved domain port numbers to forward corresponding data after the judgment result is yes; and at the same time, terminating the IP forwarding strategy of the data packet.
4. The train control ethernet addressing system of claim 3, wherein the switch capable of resolving domain port numbers is further configured to continue to perform data processing using an IP forwarding policy when it is determined that the domain port numbers of the source node and the destination node are not filled in the extension field or the resolved domain port numbers are incorrect.
5. A train control ethernet addressing method, comprising:
distributing a unique domain port number in a train control system and a unique domain port number in the whole network for the train control node accessed to the Ethernet; each domain port number respectively corresponds to one unique address information of the whole network;
establishing a topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises a mapping relation between each node domain port number and an MAC address;
in a data packet sent by a source node in the train control system, after the IP address setting of an Ethernet packet header is completed, domain port numbers of the source node and a destination node are written in an extension field of the packet header, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; then, data packet sending is carried out based on the timestamp configuration information of the domain port whole network synchronization;
in the transmission process of the data packet, after judging that an IP address conflict exists in the switch capable of analyzing the domain port number, judging whether the domain port numbers of the active node and the destination node are filled in the extension field, and searching the mapping relation by using the analyzed domain port number to forward corresponding data after the judgment result is yes; and at the same time, terminating the IP forwarding strategy of the data packet.
6. A train control ethernet addressing system, comprising:
the terminal node comprises a source node and a destination node; and an intermediate node between the source node and the destination node, the intermediate node comprising a switch capable of resolving the domain port number; in the topological structure of the system, unique domain port numbers in the train control system and unique in the whole network are distributed for train control nodes accessed to the Ethernet, and each domain port number corresponds to unique address information in the whole network; establishing a topological relation between the domain port numbers and broadcasting the topological relation to each switch of the Ethernet, wherein the topological relation comprises a mapping relation between each node domain port number and an MAC address;
the source node is used for writing domain port numbers of the source node and the destination node into an extension field of the packet header after the IP address of the Ethernet packet header is set in the sent data packet, and the domain port numbers are used for carrying out ciphertext transmission in the whole network in a hardware encryption mode; then, data packet sending is carried out based on the timestamp configuration information of the domain port whole network synchronization;
the switch capable of resolving the domain port number is used for firstly judging whether the domain port numbers of the active node and the destination node are filled in the extension field after judging that the IP address conflict exists in the transmission process of the data packet, and searching the mapping relation by the resolved domain port number to forward corresponding data after the judgment result is yes; and at the same time, terminating the IP forwarding strategy of the data packet.
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