10 results about "Train communication network" patented technology

The invention discloses a train communication network fault diagnosis method and device based on a multi-view hypergraph convolutional network, and the method comprises the following steps: firstly, collecting various high-order heterogeneous fault data of a train communication network under multiple working conditions, multiple time periods and multiple communication modes, then carrying out the analysis and preprocessing of the collected original data, and carrying out the fault diagnosis of the train communication network. The method comprises the steps of preprocessing data, dividing the preprocessed data into a training set and a test set according to a certain proportion, then fully mining potential relations among nodes from multiple dimensions through multi-view joint modeling, then building a train communication network fault diagnosis MVHGNN model, and finally performing training and parameter adjustment on the MVHGNN model through the training set. And sending the test set into the trained MVHGNN model to identify various network faults. According to the method, a complex heterogeneous high-order structure in the train communication network is analyzed through multiple views, the classification capability of the model on various types of space-time faults is improved, and intelligent diagnosis of the train communication network can be realized.

The invention provides an automatic networking method for a train communication network and a storage medium. The method comprises the following steps: a management center reads a networking planning file and constructs a logical topology; based on a link layer discovery protocol, the management center interacts with managed equipment to construct a physical topology; if the physical topology is matched with the logical topology, the management center establishes network configuration protocol connection with the managed equipment; the management center distributes automatic networking configuration data to the managed equipment; and based on a publishing and subscribing mode, the management center performs state monitoring on the managed equipment.

The invention relates to a time synchronization system and method of a TSN train communication network. The system comprises a backbone network clock domain, a marshalling network clock domain and an intermediate clock domain formed by connecting backbone network nodes and marshalling network nodes, the two backbone network clock domains receive the same external clock source through each autonomous clock node to realize time synchronization, and provide a unified time reference for each marshalling network clock domain; under the condition that the time synchronization of the clock domain of the backbone network is abnormal or invalid, the backbone network node sends a synchronization abnormal signal to the marshalling network node of the intermediate clock domain where the backbone network node is located; the marshalling network clock domain is used for realizing time synchronization of equipment supporting the TSN in the marshalling network; under the condition that the synchronization abnormal signal is received, the marshalling network node of the middle clock domain does not enable the time synchronization function, so that the backbone network clock domain is isolated from the marshalling network clock domain where the marshalling network node is located. The problem that large-area synchronization abnormity of the whole vehicle may be caused once the time synchronization of the backbone network fails is solved.

The application provides a motor train city area braking software integrated test system, and relates to the motor train city area braking software test technical field.The system comprises: a plurality of electronic brake control unit cabinets to be tested, a plurality of sub-simulation nodes, a main simulation node and a test service node; the sub-simulation nodes are electrically connected with the corresponding electronic brake control unit cabinets respectively, are used for simulating the external input signals of the electronic brake control unit cabinets and collecting the output signals of the electronic brake control unit cabinets; the main simulation node is used for controlling the signal interaction between the sub-simulation nodes and the electronic brake control unit cabinets by managing the train communication network and simulating the train bus control instructions; the test service node is used for uniformly configuring, parameter issuing and scheduling controlling the main simulation node and the sub-simulation nodes, and analyzing the output signals to generate a test report.The application realizes software configuration instead of physical replacement, significantly shortens the test preparation time, improves the test stability and prolongs the hardware life.

The invention provides a train network security protection method, a train network security protection system and a computer readable storage medium. The train network security protection method comprises the following steps: carrying out identity authentication on an external system, and identifying an equipment category and a corresponding port of the external system; in response to the fact that the equipment category of the external system is maintenance equipment, starting a bastion host function; and in response to the fact that the equipment category of the external system is communication equipment, based on the configuration of the corresponding port, starting a security audit and intrusion detection function or a firewall function, the starting of the security audit and intrusion detection function or the firewall function comprising analysis of a message of a train-specific protocol and control data thereof. According to the train network safety protection method, multiple safety protection functions can be achieved at the same time, the number of safety devices and the size of a train communication network are reduced, analysis of a train special protocol is achieved, and therefore more efficient protection is achieved in a rail transit vehicle-mounted network.

The application discloses a train communication network construction method and device, equipment and storage medium, applied to the train communication field, including: obtaining a wired train communication network composed of a backbone network node and a marshalling network node when a train is initially running, the backbone network node and the marshalling network node both have wired functions and wireless functions; numbering each marshalling network node by using a wired marshalling network in the wired train communication network; constructing a wireless marshalling network according to the numbering; and connecting the wireless marshalling network to the train backbone network. After the wired train communication network is initialized, the marshalling network node is numbered based on the wired marshalling network, the wireless marshalling network is constructed according to the numbering, the initialization of the wireless marshalling network is completed, the existing wired network architecture is compatible, the hardware change is small, and the stability is high, so that the maintenance cost is reduced, and the maintenance efficiency is improved.

The embodiment of the application discloses a train communication network topology structure and a data transmission method based on ECN and ETBN, which are used for improving the reliability and stability of train communication. The structure comprises: a first ECN, a second ECN, a third ECN and a fourth ECN arranged in each carriage of a train; a first ETBN, a second ETBN, a third ETBN and a fourth ETBN arranged in a backbone network head carriage of the train; the first ETBN, the second ETBN, the third ETBN and the fourth ETBN form an ETBN network layer; the first ECN and the second ECN of each carriage in the train form a first ECN network layer, and the third ECN and the fourth ECN of each carriage in the train form a second ECN network layer; and the ETBN network layer is located between the first ECN network layer and the second ECN network layer.

This invention relates to a method, equipment, and medium for coordinated control of main circuit breakers in electric locomotive formations. The method includes: determining the master locomotive in the formation; determining the node sequence of each locomotive in the formation based on the master locomotive; collecting overhead contact line parameters in real time; dynamically calculating the closing time interval of the main circuit breakers of each slave locomotive based on the grid parameters and the node sequence; prioritizing the closing of the main circuit breaker of the master locomotive; after the master locomotive's main circuit breaker closes first, sending a closing start signal to all slave locomotives through the train communication network; and ensuring that each slave locomotive, upon receiving the closing start signal, closes its own main circuit breaker according to its node sequence, after delaying the closing time interval. By combining a multi-level, high-fault-tolerant automatic formation mode identification mechanism with a dynamically adaptive main circuit breaker coordinated control strategy, precise, safe, and efficient control of the high-voltage main circuit of electric locomotives with different formation configurations is achieved.

This application belongs to the field of train communication network security technology, and relates to an Ethernet intrusion detection method and system. The method includes: acquiring physical domain data and information domain data from the train communication network; normalizing primary network flows using Z-value standardization to obtain time-domain features; converting basic traffic, communication protocols, and connection behaviors into frequency-domain signals using short-time Fourier transform to obtain frequency-domain features; calculating the weights of each time-domain feature and each frequency-domain feature using grey relational analysis; modeling using a structured state-space sequence model and a convolutional neural network to obtain two abstract feature representations; fusing the two abstract feature representations and weighting the weights of each feature using an attention mechanism to obtain a fused feature representation; and analyzing the two features using a target intrusion detection model to identify different intrusion attack events. This invention improves the completeness and accuracy of intrusion detection.

Provided in the present invention are an automatic networking method for a train communication network, and a storage medium. The method comprises: a management center reading a networking planning file, and constructing a logical topology; on the basis of a link layer discovery protocol, the management center interacting with a managed device, so as to construct a physical topology; if the physical topology matches the logical topology, the management center establishing a network configuration protocol connection with the managed device; the management center distributing automatic networking configuration data to the managed device; and on the basis of a publish-subscribe mode, the management center monitoring the state of the managed device.