TRDP message forwarding method and system, storage medium and processor

Abstract

The invention discloses a TRDP message forwarding method, a TRDP message forwarding system, a storage medium and a processor, relates to the technical field of communication, and solves the technical problem of low safety and reliability of a TRDP message in a transmission process due to the fact that the network bandwidth of the TRDP message is excessively occupied under the condition that the non-TRDP data flow is too large in the existing scheme. According to the invention, the message types of a plurality of messages to be transmitted are determined based on an access control list (ACL); adding the corresponding message to be transmitted into a forced priority queue based on a quality of service (QOS) module and the message type; carrying out bandwidth allocation on the forced priority queue based on the transmission priority; and performing targeted transmission on the plurality of to-be-transmitted messages based on the allocated bandwidth and message type. Therefore, different types of messages are guaranteed to obtain differentiated transmission services in a complex network environment, and the security and reliability of the TRDP message in the transmission process are improved.

Description

Technical Field

[0001] The present invention belongs to the field of communication technologies, and specifically provides a method, system, storage medium and processor for forwarding a TRDP message. Background Art

[0002] As the TRDP protocol is used more and more widely, it is also widely used in railway transportation, such as train monitoring systems, train control systems, signal systems, etc. These signals directly affect driving safety, so there are extremely high requirements for switches that transmit TRDP messages.

[0003] The common practice now is to place TRDP-supported devices (hereinafter referred to as TRDP devices) in the same virtual local area network (VLAN) through structural design or isolation through virtual local area network (hereinafter referred to as VLAN), and separate them from other devices that do not support TRDP (hereinafter referred to as non-TRDP devices) to ensure its real-time performance and reliability. However, even if the TRDP devices are isolated in the same VLAN, there will be other non-TRDP data. If the traffic of these non-TRDP data is too large, it may affect the normal network, resulting in low security and reliability of TRDP messages during transmission. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art; to this end, the present invention proposes a forwarding method, system, storage medium and processor for a TRDP message, for solving the technical problem that the network bandwidth of the TRDP message is excessively occupied when the non-TRDP data traffic is too large, thereby causing the security and reliability of the TRDP message during transmission to be not high.

[0005] To achieve the above object, a first aspect of the present invention provides a method for preferentially forwarding TRDP messages, comprising:

[0006] Obtaining status information of the switch and generating multiple messages to be transmitted based on the status information; and configuring the switch according to the command line; wherein the status information includes software version number, configuration file version number, port status and ring network protocol status;

[0007] Determine the message types of multiple messages to be transmitted based on the access control list (ACL);

[0008] Add the corresponding to-be-transmitted message to the mandatory priority queue based on the quality of service module QOS and message type;

[0009] Allocate bandwidth to the mandatory priority queue based on transmission priority;

[0010] Targeted transmission of multiple packets to be transmitted is performed based on the allocated bandwidth and packet type.

[0011] It should be noted that Access Control List (ACL) is an access control technology based on packet filtering. It can filter data packets on the interface according to the set conditions, allowing them to pass or discarding them. Access Control List is widely used in routers and Layer 3 switches. With the help of Access Control List, user access to the network can be effectively controlled, thereby maximizing network security.

[0012] QOS (Quality of Service) refers to a network's ability to use various basic technologies to provide better service for specified network communications. It is a network security mechanism and a technology used to solve problems such as network delays and congestion.

[0013] Preferably, the switch adopts the TRDP-PD process data communication mode in the TRDP protocol, and sets the data sending and receiving type of the switch to the sender; wherein the data sending and receiving type includes a sender, a receiver, and a requester.

[0014] Preferably, determining the message types of multiple messages to be transmitted based on the access control list ACL includes:

[0015] Acquire characteristic information of multiple packets to be transmitted, wherein the characteristic information includes Ethernet type, IP protocol, and transport layer destination port;

[0016] Filter the characteristic information of multiple packets to be transmitted through the access control list (ACL);

[0017] If the characteristic information of the message to be transmitted meets the preset TRDP rules, the message type corresponding to the message to be transmitted is marked as a TRDP message;

[0018] If the characteristic information of the message to be transmitted does not comply with the preset TRDP rules, the message type corresponding to the message to be transmitted will be marked as a non-TRDP message;

[0019] The message types include TRDP messages and non-TRDP messages.

[0020] Preferably, configuring the switch according to the command line includes:

[0021] Set the configuration file in the switch through the command line; the configuration file includes TRDP startup status, destination IP, communication identifier, data sending cycle and user data length, and the TRDP startup status includes on and off.

[0022] Preferably, the step of adding the corresponding to-be-transmitted message to a mandatory priority queue based on the quality of service module QOS and the message type includes:

[0023] Extracting message types of multiple messages to be transmitted;

[0024] Integrate multiple flow queues of any port in the Quality of Service (QOS) module into a mandatory priority queue; wherein the mandatory priority queue includes multiple flow queues, and each flow queue has a different transmission priority; schedule the mandatory priority queue based on a strict priority queue algorithm;

[0025] If the message type of the message to be transmitted is a TRDP message, the corresponding message to be transmitted is added to the flow queue with the highest transmission priority;

[0026] If the message type of the message to be transmitted is a non-TRDP message, the corresponding message to be transmitted will be added to the flow queue with the lowest transmission priority.

[0027] Preferably, the scheduling of the mandatory priority queue based on the strict priority queue algorithm includes:

[0028] Extract the transmission priority of each flow queue in the forced priority queue; sort the forced priority queues in descending order of the transmission priority of the flow queues, and sequentially extract and send the packets to be transmitted from the flow queue with the highest transmission priority in the forced priority queue.

[0029] Preferably, allocating bandwidth to the mandatory priority queue based on transmission priority includes:

[0030] Extract the transmission priority and maximum bandwidth of each flow queue in the mandatory priority queue;

[0031] If the transmission priority of the flow queue is the highest transmission priority, the bandwidth of the corresponding flow queue is set to the maximum bandwidth of the switch;

[0032] If the transmission priority of the flow queue is not the highest transmission priority, the bandwidth of the corresponding flow queue is set to 80% of the maximum bandwidth of the switch.

[0033] A second aspect of the present invention provides a TRDP message forwarding system, comprising: a switch module, and an ACL module and a QOS module connected thereto;

[0034] The switch module is configured to obtain status information of the switch and generate a plurality of messages to be transmitted based on the status information; and to configure the switch according to a command line; wherein the status information includes software version number, configuration file version number, port status, and ring network protocol status;

[0035] The ACL module is used to determine the message types of multiple messages to be transmitted based on the access control list ACL;

[0036] The QOS module is used to add the corresponding to-be-transmitted message to the mandatory priority queue based on the quality of service module QOS and the message type; allocate bandwidth to the mandatory priority queue based on the transmission priority; and transmit multiple to-be-transmitted messages in a targeted manner based on the allocated bandwidth and message type.

[0037] A third aspect of the present invention provides a storage medium, the storage medium including a stored executable program, wherein, when the executable program is running, the device where the storage medium is located is controlled to execute the above-mentioned method for preferential forwarding of a TRDP message.

[0038] A fourth aspect of the present invention provides a processor, which is used to run an executable program, wherein the executable program executes the above-mentioned method for preferential forwarding of TRDP messages when running.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention dynamically generates multiple messages to be transmitted by obtaining the software version number, configuration file version number, port status and ring network protocol status of switch, and configures switch in real time in conjunction with command line, improves the flexibility and automation level of network management; Received messages are classified and identified by access control list ACL, TRDP messages are added to the stream queue with the highest transmission priority in conjunction with QOS mechanism, so as to achieve priority scheduling to key business traffic; Bandwidth is then reasonably allocated according to transmission priority, so as to ensure that different types of messages obtain differentiated transmission services in a complex network environment, it is conducive to improving the security and reliability of TRDP messages in transmission process, significantly improving network transmission efficiency and quality of service, and enhancing the stability and responsiveness of the system.

[0041] 2nd, the present invention adopts differentiated bandwidth allocation strategy by the transmission priority of stream queue, realizes the refined resource scheduling to mandatory priority queue:When stream queue has the highest transmission priority, directly allocating switch maximum bandwidth can guarantee the real-time and stability of key business;80% bandwidth is allocated to non-highest priority stream queue to avoid its excessive occupation of resources, and basic communication capability can be maintained again.The method is driven by the dynamic resource allocation mechanism of priority, and when non-TRDP message data flow is too large to cause network congestion, it is ensured that switch can reserve part of bandwidth for high-priority TRDP messages to transmit, so that the train key data such as train control signal carried by TRDP messages can be promptly forwarded, so as to be conducive to improving the safety and reliability of TRDP messages in transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 It is an overall flow chart of the preferential forwarding method of the TRDP message in an embodiment of the present invention;

[0044] Figure 2 Schematic diagram of the principle of the priority forwarding system of TRDP messages in an embodiment of the present invention;

[0045] Figure 3 It is a test diagram of the TRDP message and non-TRDP occupied bandwidth in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] See also Figure 1-Figure 3 , the first embodiment of the present invention provides a method for preferentially forwarding TRDP messages, comprising:

[0048] S1: Obtaining switch status information and generating multiple messages to be transmitted based on the status information; and configuring the switch according to the command line; wherein the status information includes software version number, configuration file version number, port status, and ring network protocol status;

[0049] S2: determining the message types of multiple messages to be transmitted based on the access control list (ACL);

[0050] S3: Add the corresponding to-be-transmitted message to the mandatory priority queue based on the quality of service module QOS and message type;

[0051] S4: Allocate bandwidth to the mandatory priority queue based on transmission priority;

[0052] S5: Targetedly transmit multiple messages to be transmitted based on the allocated bandwidth and message type.

[0053] It should be noted that Access Control List (ACL) is an access control technology based on packet filtering. It can filter data packets on the interface according to the set conditions, allowing them to pass or discarding them. Access Control List is widely used in routers and Layer 3 switches. With the help of Access Control List, user access to the network can be effectively controlled, thereby maximizing network security.

[0054] QOS (Quality of Service) refers to a network's ability to use various basic technologies to provide better service for specified network communications. It is a network security mechanism and a technology used to solve problems such as network delays and congestion.

[0055] In an embodiment of the present invention, the switch adopts the TRDP-PD process data communication mode in the TRDP protocol, and sets the data sending and receiving type of the switch to sender; wherein, the data sending and receiving type includes sender, receiver and requester.

[0056] In an embodiment of the present invention, determining the message types of multiple messages to be transmitted based on the access control list (ACL) includes:

[0057] Acquire characteristic information of multiple packets to be transmitted, wherein the characteristic information includes Ethernet type, IP protocol, and transport layer destination port;

[0058] Filter the characteristic information of multiple packets to be transmitted through the access control list (ACL);

[0059] If the characteristic information of the message to be transmitted meets the preset TRDP rules, the message type corresponding to the message to be transmitted is marked as a TRDP message;

[0060] If the characteristic information of the message to be transmitted does not comply with the preset TRDP rules, the message type corresponding to the message to be transmitted will be marked as a non-TRDP message;

[0061] The message types include TRDP messages and non-TRDP messages.

[0062] For example, the characteristic information of the message 1 to be transmitted is set to (etherType: 0x0800, IpProtocol: 0x11, L4DstPort: 17224);

[0063] The characteristic information of the packet 2 to be transmitted is (etherType: 0x86DD, IpProtocol: 0x11, L4DstPort: 17224);

[0064] The default TRDP rule is (etherType: 0x0800, IpProtocol: 0x11, L4DstPort: 17224);

[0065] Since the characteristic information of the message 1 to be transmitted complies with the preset TRDP rule, the message type of the message 1 to be transmitted is marked as a TRDP message;

[0066] Since the characteristic information of the message 2 to be transmitted does not comply with the preset TRDP rule, the message type of the message 2 to be transmitted is marked as a non-TRDP message.

[0067] It should be noted that the characteristic information of the message to be transmitted includes the Ethernet type (EtherType), IP protocol (IpProtocol) and transport layer destination port (L4DstPort);

[0068] When EtherType is 0x0800, it indicates that the Ethernet type is IPV4; when EtherType is 0x86DD, it indicates that the Ethernet type is IPV6;

[0069] IP protocol (IpProtocol) is used to indicate the protocol type of the upper layer network, including TCP protocol and UDP protocol;

[0070] The transport layer destination port (L4DstPort) is used to specify the port number of the application or service that receives data.

[0071] In an embodiment of the present invention, configuring a switch according to a command line includes:

[0072] Set the configuration file in the switch through the command line; the configuration file includes TRDP startup status, destination IP, communication identifier, data sending cycle and user data length, and the TRDP startup status includes on and off.

[0073] Exemplarily, the TRDP startup state in the configuration file in the switch is set to on, the destination IP is set to 239.0.3.5, the communication identifier is set to 1000, the data sending cycle is set to 100ms, and the user data length is set to 32 bytes.

[0074] In an embodiment of the present invention, adding a corresponding to-be-transmitted message to a mandatory priority queue based on the quality of service module QOS and the message type includes:

[0075] Extracting message types of multiple messages to be transmitted;

[0076] Integrate multiple flow queues of any port in the Quality of Service (QOS) module into a mandatory priority queue; wherein the mandatory priority queue includes multiple flow queues, and each flow queue has a different transmission priority; schedule the mandatory priority queue based on a strict priority queue algorithm;

[0077] If the message type of the message to be transmitted is a TRDP message, the corresponding message to be transmitted is added to the flow queue with the highest transmission priority;

[0078] If the message type of the message to be transmitted is a non-TRDP message, the corresponding message to be transmitted will be added to the flow queue with the lowest transmission priority.

[0079] Specifically, any port in the quality of service module QOS includes 8 flow queues, and the transmission priority from flow queue 1, ..., to flow queue 8 increases successively; through the quality of service module QOS configuration port 802.1p, all messages of flow queues 2, 3, 4, 5, and 6 are mapped to flow queue 1, and the messages of flow queue 7 are mapped to flow queue 8; flow queues 2, 3, 4, 5, 6, and 7 adopt the default initialization state, and no speed limit is set; it is realized that non-TRDP messages can only enter flow queues 1 to 7, and TRDP messages enter flow queue 8 after being identified by the ACL module, thereby achieving the purpose of prioritizing forwarding TRDP messages.

[0080] The present invention, by extracting the type information of message to be transmitted, combines the integration of multiple stream queues in quality of service module QOS with strict priority queue algorithm, builds forced priority queue scheduling mechanism, and the derivation process of its beneficial effect is as follows: First, TRDP messages (real-time data protocol) are assigned to the highest priority stream queue, and non-TRDP messages are assigned to the lowest priority stream queue, and strict priority algorithm is utilized to ensure that high-priority messages are preferentially transmitted, so as to significantly reduce the transmission delay and the jitter of TRDP class services, meet the high requirements of industrial communication to real-time and reliability;Secondly, by isolating low-priority non-TRDP messages to independent queues, it is avoided that they seize key business resources, effectively reduce system resource contention conflicts, promote overall resource utilization and scheduling efficiency;Finally, the hierarchical design of forced priority queues combines dynamic scheduling strategy, while guaranteeing key business quality of service, takes into account the orderly transmission of non-critical business, so as to be conducive to improving the security and reliability of TRDP messages in transmission process.

[0081] In an embodiment of the present invention, scheduling a mandatory priority queue based on a strict priority queue algorithm includes:

[0082] Extract the transmission priority of each flow queue in the forced priority queue; sort the forced priority queues in descending order of the transmission priority of the flow queues, and sequentially extract and send the packets to be transmitted from the flow queue with the highest transmission priority in the forced priority queue.

[0083] In an embodiment of the present invention, bandwidth allocation to a mandatory priority queue based on transmission priority includes:

[0084] Extract the transmission priority and maximum bandwidth of each flow queue in the mandatory priority queue;

[0085] If the transmission priority of the flow queue is the highest transmission priority, the bandwidth of the corresponding flow queue is set to the maximum bandwidth of the switch;

[0086] If the transmission priority of the flow queue is not the highest transmission priority, the bandwidth of the corresponding flow queue is set to 80% of the maximum bandwidth of the switch.

[0087] The present invention adopts differentiated bandwidth allocation strategy by the transmission priority of stream queue, realizes the refined resource scheduling to mandatory priority queue:When stream queue has the highest transmission priority, directly allocating switch maximum bandwidth can guarantee the real-time and stability of key business;80% bandwidth is allocated to non-highest priority stream queue to avoid its excessive occupation of resources, and basic communication capability can be maintained again.The method is driven by the dynamic resource allocation mechanism of priority, and when non-TRDP message data flow is too large to cause network congestion, it is ensured that switch can reserve part of bandwidth for high-priority TRDP messages to transmit, so that the train key data such as train control signal carried by TRDP messages can be promptly forwarded, so as to be conducive to improving the safety and reliability of TRDP messages in transmission process.

[0088] A second aspect of the present invention provides a TRDP message forwarding system, comprising: a switch module, and an ACL module and a QOS module connected thereto;

[0089] The switch module is configured to obtain status information of the switch and generate a plurality of messages to be transmitted based on the status information; and to configure the switch according to a command line; wherein the status information includes software version number, configuration file version number, port status, and ring network protocol status;

[0090] The ACL module is used to determine the message types of multiple messages to be transmitted based on the access control list ACL;

[0091] The QOS module is used to add the corresponding to-be-transmitted message to the mandatory priority queue based on the quality of service module QOS and the message type; allocate bandwidth to the mandatory priority queue based on the transmission priority; and transmit multiple to-be-transmitted messages in a targeted manner based on the allocated bandwidth and message type.

[0092] A third aspect of the present invention provides a storage medium, wherein the storage medium includes a stored executable program, wherein when the executable program is running, the device where the storage medium is located is controlled to execute the above-mentioned method for preferential forwarding of a TRDP message.

[0093] A fourth aspect of the present invention provides a processor for running an executable program, wherein the executable program executes the above-mentioned method for preferential forwarding of TRDP messages when the program is running.

[0094] Some of the data in the above formula are calculated by removing the dimensions and taking their numerical values. The formula is a formula that is closest to the actual situation obtained by software simulation of a large amount of collected data; the preset parameters and preset thresholds in the formula are set by technical personnel in this field according to actual conditions or obtained through simulation of a large amount of data.

[0095] Working principle of the present invention:

[0096] The present invention obtains status information of a switch and generates multiple messages to be transmitted according to the status information; configures the switch according to a command line; determines the message types of the multiple messages to be transmitted based on an access control list (ACL); adds the corresponding messages to be transmitted to a mandatory priority queue based on a quality of service (QOS) module and the message type; allocates bandwidth to the mandatory priority queue based on the transmission priority; and transmits the multiple messages to be transmitted in a targeted manner based on the allocated bandwidth and the message type.

[0097] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A method for preferentially forwarding TRDP messages, characterized in that, include: Obtaining switch status information and generating multiple messages to be transmitted based on the status information; and, configuring the switch according to the command line; wherein the status information includes the software version number, the configuration file version number, the port status, and the ring network protocol status; Determine the message types of multiple messages to be transmitted based on the access control list (ACL); Add the corresponding to-be-transmitted message to the mandatory priority queue based on the quality of service module QOS and message type; Allocate bandwidth to the mandatory priority queue based on transmission priority; Targeted transmission of multiple packets to be transmitted is performed based on the allocated bandwidth and packet type.

2. The preferential forwarding method of TRDP messages according to claim 1, wherein The switch adopts the TRDP-PD process data communication mode in the TRDP protocol, and sets the data sending and receiving type of the switch to sender; wherein, the data sending and receiving type includes sender, receiver and requester.

3. The preferential forwarding method of TRDP messages according to claim 1, wherein Configuring the switch according to the command line includes: Set the configuration file in the switch through the command line; the configuration file includes TRDP startup status, destination IP, communication identifier, data sending cycle and user data length, and the TRDP startup status includes on and off.

4. The preferential forwarding method of TRDP messages according to claim 1, wherein The determining of the message types of the plurality of messages to be transmitted based on the access control list ACL includes: Acquire characteristic information of multiple packets to be transmitted, wherein the characteristic information includes Ethernet type, IP protocol, and transport layer destination port; Filter the characteristic information of multiple packets to be transmitted through the access control list (ACL); If the characteristic information of the message to be transmitted meets the preset TRDP rules, the message type corresponding to the message to be transmitted is marked as a TRDP message; If the characteristic information of the message to be transmitted does not comply with the preset TRDP rules, the message type corresponding to the message to be transmitted will be marked as a non-TRDP message; The message types include TRDP messages and non-TRDP messages.

5. The preferential forwarding method of TRDP messages according to claim 1, wherein The step of adding the corresponding to-be-transmitted message to a mandatory priority queue based on the quality of service module QOS and the message type includes: Extracting message types of multiple messages to be transmitted; Integrate multiple flow queues of any port in the Quality of Service (QOS) module into a mandatory priority queue; wherein the mandatory priority queue includes multiple flow queues, and each flow queue has a different transmission priority; schedule the mandatory priority queue based on a strict priority queue algorithm; If the message type of the message to be transmitted is a TRDP message, the corresponding message to be transmitted is added to the flow queue with the highest transmission priority; If the message type of the message to be transmitted is a non-TRDP message, the corresponding message to be transmitted will be added to the flow queue with the lowest transmission priority.

6. The preferential forwarding method of TRDP messages according to claim 5, wherein The scheduling of the mandatory priority queue based on the strict priority queue algorithm includes: Extract the transmission priority of each flow queue in the forced priority queue; sort the forced priority queues in descending order of the transmission priority of the flow queues, and sequentially extract and send the packets to be transmitted from the flow queue with the highest transmission priority in the forced priority queue.

7. The preferential forwarding method of TRDP messages according to claim 1, wherein The allocating bandwidth to the mandatory priority queue based on the transmission priority includes: Extract the transmission priority and maximum bandwidth of each flow queue in the mandatory priority queue; If the transmission priority of the flow queue is the highest transmission priority, the bandwidth of the corresponding flow queue is set to the maximum bandwidth of the switch; If the transmission priority of the flow queue is not the highest transmission priority, the bandwidth of the corresponding flow queue is set to 80% of the maximum bandwidth of the switch.

8. A forwarding system for TRDP messages, for implementing the preferential forwarding method of the TRDP messages described in any one of claims 1-7, characterized in that, include: Switch module, and the ACL module and QOS module connected to it; The switch module is used to obtain status information of the switch and generate multiple messages to be transmitted according to the status information; and, configuring the switch according to the command line; wherein the status information includes the software version number, the configuration file version number, the port status, and the ring network protocol status; The ACL module is used to determine the message types of multiple messages to be transmitted based on the access control list ACL; The QOS module is used to add the corresponding to-be-transmitted message to the mandatory priority queue based on the quality of service module QOS and the message type; allocate bandwidth to the mandatory priority queue based on the transmission priority; and transmit multiple to-be-transmitted messages in a targeted manner based on the allocated bandwidth and message type.

9. A storage medium, characterized in that The storage medium stores an executable program, which, when executed by a processor, is used to implement the priority forwarding method for the TRDP message described in any one of claims 1 to 7.

10. A processor, characterized in that: The processor is configured to run an executable program, wherein the executable program executes the method for preferentially forwarding TRDP messages described in any one of claims 1 to 7 when the program is running.

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