A train communication network construction method, device and equipment and storage medium

Abstract

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.

Description

Technical Field

[0001] This invention relates to the field of train communication, and in particular to a method, apparatus, device and storage medium for constructing a train communication network. Background Technology

[0002] Currently, train network systems primarily adopt the Train Communication Network (TCN) topology. The TCN general architecture defines a two-layer network structure: the train backbone network and the train formation network. The train backbone network is mainly divided into two types: train backbone networks based on bus technology (such as the Wire Train Bus, WTB) and train backbone networks based on switching technology (Ethernet). Train formation networks based on different technologies such as MVB (Multifunction Vehicle Bus), CANopen (Controller Area Network, a high-level communication protocol built on a control area network), and ECN (Electronic Communication Network) can be connected to the same train backbone network.

[0003] Current train network technologies are all based on physical cables, which are costly, complex to install, and difficult to maintain and diagnose. Under harsh operating environments such as vibration, conductor fatigue, or high temperatures, the conductors are easily damaged. This not only reduces the quality of train network communication but also results in a low-flexibility network architecture that cannot meet the needs of innovative applications such as wireless sensors and virtual train formations. However, current research focuses only on wireless backbone network connections; further exploration is needed regarding the wireless train formation network architecture and its networking methods. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method, apparatus, device and storage medium for constructing a train communication network, which solves the problems of high maintenance cost and inconvenience in maintenance of train formation networks in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides a method for constructing a train communication network, comprising:

[0006] The wired train communication network consisting of backbone network nodes and marshalling network nodes is obtained during the initial operation of the train. Both the backbone network nodes and the marshalling network nodes have wired and wireless functions.

[0007] Each train marshalling network node is numbered using the wired marshalling network in the aforementioned wired train communication network;

[0008] A wireless train formation network is constructed based on the numbering, and the wireless train formation network is connected to the train backbone network.

[0009] Optionally, the step of numbering each train marshalling network node using the wired train communication network includes:

[0010] The wired connection information of each grouping network node is obtained based on the wired grouping network;

[0011] The wired connection information is used to determine the grouping network nodes to which each grouping network node is connected, and the wireless signal strength information of the connected grouping network nodes is calculated.

[0012] The physical information of each grouping network node is determined based on the wireless signal strength information, and then numbered.

[0013] Optionally, the step of determining the grouping network nodes connected to each grouping network node through the connection information, and calculating the wireless signal strength information of the connected grouping network nodes; determining the physical information of each grouping network node based on the wireless signal strength information, and assigning a number, includes:

[0014] The marshalling network node connected to the backbone network node is used as the head node.

[0015] The marshalling network nodes that are not connected to the backbone network nodes are designated as non-head nodes.

[0016] The physical information of the head node is determined based on the wired connection information and the wireless signal strength information, and then numbered.

[0017] The physical information of the non-head node is determined based on the wired connection information and the information of the numbered grouped network nodes, and then numbered.

[0018] Optional, also includes:

[0019] Terminal devices are connected to the train marshalling network through the marshalling network nodes;

[0020] The terminal equipment includes wired terminal equipment and wireless terminal equipment.

[0021] Optionally, the wireless terminal device accesses the train marshalling network through the wireless marshalling network node, including:

[0022] The wireless terminal device is used to calculate the wireless signal strength information of each grouping network node;

[0023] The wireless signal strength information and its corresponding grouping network nodes are sorted from high to low to obtain a sequence;

[0024] The first grouping network node in the sequence is designated as the first grouping network node, and the second grouping network node in the sequence is designated as the second grouping network node.

[0025] When the wireless terminal device is not a wireless security terminal device, the wireless terminal device establishes a wireless connection with the first grouping network node;

[0026] When the wireless terminal device is a wireless security terminal device, the wireless terminal device establishes wireless connections with the first grouping network node and the second grouping network node respectively.

[0027] Optionally, when the wireless terminal device is a wireless security terminal device, the wireless terminal device connects to the first grouping network node and the second grouping network node respectively, including:

[0028] If the first grouping network node and the second grouping network node are in the same carriage, the wireless security terminal device establishes wireless connections with the first grouping network node and the second grouping network node respectively;

[0029] If the first grouping network node and the second grouping network node are not in the same carriage, the wireless security terminal device establishes a wireless connection with the first grouping network node.

[0030] Optionally, the wired train communication network used in the wired train communication network is a single train formation network consisting of four carriages.

[0031] The present invention also provides a train communication network construction device, comprising:

[0032] The acquisition module is used to acquire the wired train communication network consisting of backbone network nodes and marshalling network nodes during the initial operation of the train. Both the backbone network nodes and the marshalling network nodes have wired and wireless functions.

[0033] The numbering module is used to number the nodes of the marshalling network using the wired marshalling network in the wired train communication network.

[0034] The module is used to construct a wireless marshalling network according to the number and connect the wireless marshalling network to the train backbone network.

[0035] The present invention also provides a train communication network construction device, comprising:

[0036] Memory, used to store computer programs;

[0037] A processor is used to implement the steps of the above-described train communication network construction method when executing the computer program.

[0038] The present invention also provides a storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described train communication network construction method.

[0039] As can be seen, this invention acquires a wired train communication network consisting of backbone network nodes and marshalling network nodes during the initial operation of the train. Both backbone network nodes and marshalling network nodes have wired and wireless functions. The invention then uses the wired marshalling network within the wired train communication network to number each marshalling network node. Based on these numbers, a wireless marshalling network is constructed and connected to the train backbone network. This invention initializes the wired train communication network, numbers the marshalling network nodes based on the wired marshalling network, and constructs the wireless marshalling network according to these numbers, thus completing the initialization of the wireless marshalling network. This approach is highly compatible with existing train networks. The marshalling network nodes can automatically construct fully connected or partially connected wireless transmission networks to complete network initialization without manual intervention, thereby reducing maintenance costs and improving maintenance efficiency.

[0040] In addition, the present invention also provides a train communication network construction device, equipment and storage medium, which also have the above-mentioned beneficial effects. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0042] Figure 1 A flowchart illustrating a method for constructing a train communication network according to an embodiment of the present invention;

[0043] Figure 2 A flowchart of a wireless grouping network construction method is provided for an embodiment of the present invention;

[0044] Figure 3 A flowchart illustrating a wireless terminal device accessing a network is provided in an embodiment of the present invention.

[0045] Figure 4 A wireless train network architecture diagram provided for an embodiment of the present invention;

[0046] Figure 5 A physical location diagram of wireless grouping network nodes provided in an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of a train communication network construction device provided in an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of a train communication network construction device provided in an embodiment of the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Please refer to Figure 1 , Figure 1 A flowchart illustrating a method for constructing a train communication network according to an embodiment of the present invention. The method may include:

[0051] S101: Obtain the wired train communication network consisting of backbone network nodes and marshalling network nodes during the initial operation of the train. Both backbone network nodes and marshalling network nodes have wired and wireless functions.

[0052] In this embodiment, both the grouping network nodes and the backbone network nodes have wired and wireless interfaces, meaning they possess both wired and wireless functions. Multiple grouping network nodes are connected via wired interfaces to form a wired grouping network, and multiple grouping network nodes are connected via wireless interfaces to form a wireless grouping network. Furthermore, the grouping network nodes have relay forwarding and gateway functions, thus enabling interconnection and interoperability between terminal devices.

[0053] This embodiment can construct a wired train communication network using existing technologies. Upon initial train operation, the wired train communication network is successfully established. This embodiment does not limit the connection method of each backbone network node. For example, backbone network nodes can be connected via wired connections; or they can be connected wirelessly. In this embodiment, marshalling network nodes can be connected via wired connections, backbone network nodes can be connected to marshalling network nodes via wired connections, and marshalling network nodes can be connected to backbone network nodes via wired connections. Upon initial train operation, the wired train network is formed. This embodiment does not limit the number of marshalling networks in a train. For example, a train can have two marshalling networks; or a train can have one marshalling network. This embodiment does not limit the number of carriages constituting a single marshalling network. For example, marshalling network nodes from two carriages can constitute one marshalling network; or marshalling network nodes from four carriages can constitute one marshalling network. This embodiment does not limit the number of marshalling network nodes within a single carriage. For example, a carriage can have 2 or 4 network nodes. This embodiment does not limit the location of the network nodes. For example, network nodes can be located at both ends of a carriage, or they can be located in the middle of the carriage. This embodiment does not limit the number of backbone networks in a train. For example, a train can have 2 backbone networks; or a train can have 1 backbone network. This embodiment does not limit the number of carriages that make up a backbone network. For example, backbone network nodes from 2 carriages can form a backbone network; or backbone network nodes from 4 carriages can form a backbone network. This embodiment does not limit the number of backbone network nodes within a carriage. For example, a carriage can have 2 backbone network nodes; or 2 carriages can have 1 backbone network node. This embodiment does not limit the location of the backbone network nodes. For example, backbone network nodes can be located at both ends of a carriage, or they can be located in the middle of the carriage. This embodiment can have 1 network consisting of 4 carriages.

[0054] In this embodiment, the train can be divided into two equal marshalling networks based on the number of carriages. One marshalling network is formed by the first half of the train's carriages, and the other by the second half. Each carriage contains two marshalling network nodes, which are installed in the middle of the carriage and cannot be too far apart.

[0055] S102: Number each node of the train marshalling network using the wired marshalling network in the wired train communication network.

[0056] This embodiment does not limit the numbering method. For example, each grouping node can be manually numbered according to the wired grouping network; or the connection relationship of each grouping node can be determined using the wired grouping network, and then the wireless signal strength information of the grouping nodes connected to this grouping node can be calculated. This embodiment does not limit the specific content of the wireless signal strength information, as long as it can reflect the wireless signal strength. For example, the wireless signal strength information can be the RSSI value (Received Signal Strength Indicator, abbreviated RSSI, meaning the strength indication of the received signal, the total power within the received bandwidth); or the wireless signal strength information can also be RSRP (Reference Signal Receiving Power, abbreviated RSRP, is the linear average value of the power contribution (in watts) of resource particles carrying the cell-specific reference signal in a specified measurement frequency band); or the wireless signal strength information can also be RSRQ (Reference Signal Receiving Quality, abbreviated RSRQ, representing the reference signal reception quality).

[0057] Furthermore, in order to improve maintenance efficiency and reduce manpower, the above-mentioned method of numbering each train marshalling network node using the wired train communication network may include the following steps:

[0058] Step 21: Obtain the wired connection information of each grouping network node based on the wired grouping network;

[0059] Step 22: Determine the grouping network nodes to which each grouping network node is connected through the wired connection information, and calculate the wireless signal strength information of the connected grouping network nodes;

[0060] Step 23: Determine the physical information of each grouping network node based on the wireless signal strength information, and assign it a number.

[0061] In this embodiment, the wired connection information of each grouping network node can be determined based on the wired grouping network, thereby identifying the grouping network nodes connected to each grouping network node. The wireless signal strength information of the connected grouping network nodes is calculated, and the physical information of each grouping network node is determined and numbered based on the magnitude of the wireless signal strength information.

[0062] To better understand, a specific example is given below: Network node 1 is connected to network node 2, and network node 1 is also connected to network node 3. Network node 1 can send control packets to network node 2 and network node 3 in sequence. Network node 2 and network node 3 enter transmission mode. Network node 1 can calculate the wireless signal strength information corresponding to network node 2 and network node 3. If network node 2 and network node 1 are far apart or cross carriages, the signal will weaken, and the wireless signal strength information will also decrease accordingly.

[0063] This embodiment does not limit the numbering format of the marshalling network nodes, as long as the numbering can reflect the marshalling network, carriage, and other information that distinguishes the marshalling network nodes. For example, if the numbering can be in the form of 102-2-1, the 1 in 102 represents the first marshalling network, the 2 in 102 represents the second carriage, the subsequent 2s represent marshalling network nodes, and the subsequent 1s represent the first marshalling network node of the first carriage. 101-1-1 represents the first backbone network node of the first carriage in the first marshalling network.

[0064] This embodiment does not limit whether the numbering method is consistent. For example, each grouping network node can be numbered using the above method; or grouping network nodes that are not connected to the backbone network can be numbered using the information of the already numbered grouping network nodes.

[0065] Furthermore, to improve numbering efficiency, the above-mentioned method of determining the connected network nodes of each grouping network node through connection information and calculating the wireless signal strength information of the connected grouping network nodes; determining the physical information of each grouping network node based on the wireless signal strength information and numbering it may include the following steps:

[0066] Step 31: Designate the marshalling network node connected to the backbone network node as the head node;

[0067] Step 32: Treat the marshalling network nodes that are not connected to the backbone network nodes as non-head nodes;

[0068] Step 33: Determine the physical information of the head node based on the wired connection information and wireless signal strength information, and assign it a number;

[0069] Step 34: Determine the physical information of non-head nodes based on the wired connection information and the information of the numbered grouped network nodes, and assign them numbers.

[0070] This embodiment starts with the head node. The head node uses wireless signal strength information to determine the physical information and number of the grouping network nodes connected to it. From this, non-head nodes can be identified, and these non-head nodes have already been numbered. Then, other grouping network nodes connected to the non-head nodes are identified and numbered sequentially. This process is repeated to achieve the numbering of grouping network nodes throughout the entire grouping network.

[0071] For easier understanding, please refer to the specific implementation steps. Figure 2 , Figure 2 This invention provides a flowchart for constructing a wireless marshalling network. After the initial operation of the train backbone network is completed, when a backbone network node sends a detection signal (HELLO frame) via wired connection, only the head node can respond. Therefore, this marshalling network node can be identified as the head node, and the wireless marshalling network is established starting from the head node. The head node sends a detection signal to obtain information (MAC address, Media Access Control Address, LAN address) of the wired connected marshalling network nodes, calculates the RSSI value to determine the physical information of the connected marshalling network nodes, and assigns them numbers. Based on the numbered marshalling network nodes and the wired connection information of each wireless marshalling network, the physical information of unknown marshalling network nodes is completed and numbered. This process is repeated to number all marshalling network nodes. The last marshalling network node includes information from all marshalling network nodes. Based on the MAC address, number, and other information of all marshalling network nodes, the physical and logical topologies of the entire wireless marshalling network are generated, and the topology information is propagated back to all marshalling network nodes, thereby constructing the physical and logical network topologies.

[0072] S103: Construct a wireless marshalling network according to the numbering and connect the wireless marshalling network to the train backbone network.

[0073] In this embodiment, the wireless grouping network can be implemented using IP (Internet Protocol) based technology. If other non-IP wireless communication technologies are used, the grouping network nodes also need to have address translation function to realize address mapping between wired grouping networks and wireless grouping networks.

[0074] In this embodiment, after the wireless train formation network is constructed, the terminal device can connect to the train formation network node and access the train formation network to realize communication between terminal devices.

[0075] Furthermore, in order to enable interconnection between terminal devices, the above-mentioned train communication network construction method may also include the following steps:

[0076] Terminal equipment is connected to the train marshalling network through marshalling network nodes; terminal equipment includes wired terminal equipment and wireless terminal equipment.

[0077] In this embodiment, the terminal device can access the train marshalling network through marshalling network nodes. The terminal device can be a wired terminal or a wireless terminal. This embodiment does not limit the specific method by which the terminal device accesses the train marshalling network. For example, the terminal device can connect to one marshalling network node to achieve the purpose of accessing the train marshalling network; or it can connect to two marshalling network nodes to achieve the purpose of accessing the train marshalling network. When the terminal is a wireless terminal, it can send a network distribution broadcast packet. If only one response packet is received from a marshalling network node, a communication link is directly established with that node. If multiple response packets are received from multiple marshalling network nodes, it can connect to multiple nodes, or selectively connect to several nodes.

[0078] Furthermore, to ensure the security of the wireless security terminal equipment, the aforementioned wireless terminal equipment is connected to the train marshalling network through the marshalling network node, which may include the following steps:

[0079] Step 41: Calculate the wireless signal strength information of each grouping network node using the wireless terminal equipment;

[0080] Step 42: Sort the wireless signal strength information and its corresponding grouping network nodes from high to low to obtain a sequence;

[0081] Step 43: Take the first grouping network node in the sequence as the first grouping network node, and take the second grouping network node in the sequence as the second grouping network node;

[0082] Step 43: When the wireless terminal device is not a wireless security terminal device, the wireless terminal device establishes a wireless connection with the first grouping network node;

[0083] Step 44: When the wireless terminal device is a wireless security terminal device, the wireless terminal device establishes wireless connections with the first grouping network node and the second grouping network node respectively.

[0084] In this embodiment, when the wireless terminal device is a wireless security terminal device, to ensure device security, the wireless terminal device can connect to two train formation network nodes and access the train formation network. This embodiment does not limit the relationship between the first and second train formation network nodes. For example, when the first and second train formation network nodes are in the same carriage, the wireless security terminal device can establish a wireless connection with them; or when the first and second train formation network nodes are not in the same carriage, the wireless security terminal device can establish a wireless connection with them.

[0085] Furthermore, to reduce resource waste and ensure good communication performance of the secure wireless terminal, when the wireless terminal device is a secure wireless terminal device, the establishment of wireless connections between the wireless terminal device and the first and second grouping network nodes can include the following steps:

[0086] Step 51: If the first group network node and the second group network node are in the same carriage, the wireless security terminal device establishes a wireless connection with the first group network node and the second group network node respectively.

[0087] Step 52: If the first group network node and the second group network node are not in the same carriage, the wireless security terminal device establishes a wireless connection with the first group network node.

[0088] In this embodiment, the network nodes corresponding to the maximum and second largest values ​​of the wireless signal strength information are first selected. Then, it is determined whether the two network nodes are in the same carriage. If they are, the wireless security terminal device establishes two wireless links with the two network nodes. If they are not, the wireless security terminal device establishes one wireless link with the network node corresponding to the maximum value of the wireless signal strength information.

[0089] For easier understanding, please refer to the specific implementation steps. Figure 3 , Figure 3 This is a flowchart illustrating a wireless terminal device accessing a network according to an embodiment of the present invention. The wireless terminal sends a network distribution broadcast packet. If it receives only one response packet from a grouping network node, it establishes a communication link with that node. Otherwise, the grouping network node enters transmit mode, and the wireless terminal enters receive mode, calculating the RSSI value corresponding to each grouping network node. A correspondence between grouping network nodes and RSSIs is established, and the RSSI values ​​are sorted from high to low to obtain a sequence. If the wireless terminal device is not a wireless security terminal device, a wireless link is established with the grouping network node corresponding to the highest RSSI value. If the wireless terminal device is a wireless security terminal device, it is determined whether the first and second grouping network nodes in the sequence are in the same carriage, i.e., whether the grouping network nodes with the highest and second largest RSSI values ​​are in the same carriage. If they are in the same carriage, the wireless security terminal establishes two wireless links with the first and second grouping network nodes in the sequence respectively; otherwise, it establishes one wireless link with the first grouping network node.

[0090] The train communication network construction method provided in this invention involves acquiring a wired train communication network consisting of backbone network nodes and marshalling network nodes during initial train operation. Both backbone network nodes and marshalling network nodes possess both wired and wireless capabilities. Each marshalling network node is numbered using the wired marshalling network within the wired train communication network. A wireless marshalling network is then constructed based on these numbers and connected to the train backbone network. This invention initializes the wired train communication network, numbers the marshalling network nodes based on the wired marshalling network, and constructs the wireless marshalling network accordingly, thus completing the initialization of the wireless marshalling network. This method offers good compatibility with existing train networks, reduces maintenance costs, and improves maintenance efficiency. Furthermore, the four carriages forming a single network ensures excellent wireless communication between devices. The network nodes are numbered based on wired connection information and wireless signal strength, improving maintenance efficiency and reducing manpower. Non-head nodes can be numbered according to their information and wired connections, improving numbering efficiency. Connecting terminals to network nodes enables interconnection between terminal devices. When a wireless terminal is a wireless security terminal, connecting it to two network nodes ensures its security. Establishing wireless connections between a wireless security terminal and two network nodes in the same carriage reduces resource waste and ensures good communication performance for the secure wireless terminal.

[0091] To make this invention easier to understand, a dual-encoding network is used as an example. Please refer to [link / reference needed]. Figure 4 , Figure 4 A wireless train network architecture diagram provided as an embodiment of the present invention. Specifically, it may include:

[0092] In this embodiment, both the backbone network node and the grouping network node have wireless and wired functions. That is, the backbone network node can be called a wired backbone network node and / or a wireless backbone network node, and the grouping network node can be called a wired grouping network node and / or a wireless grouping network node. Figure 4 In this context, WLTBN stands for Wireless Backbone Node; WLCNN stands for Wireless Consist Network Node; ED stands for End Device; WED stands for Wireless End Device; and WED-S stands for Safe Wireless End Device. Figure 4 Solid lines between devices represent wired links, while dashed lines represent wireless links.

[0093] A train has 8 carriages, divided into 2 network groups. Carriages 1-4 form one network group, and carriages 5-8 form another. Each carriage contains 2 wireless network nodes. Wireless network nodes need to have both wired and wireless interfaces. Multiple wireless network nodes are connected via Ethernet interfaces to form an Ethernet ring network, and multiple wireless network nodes are connected via wireless interfaces to form a wireless network.

[0094] Wireless terminal devices WED and WED-S can wirelessly access wireless grouping network nodes. To ensure communication security, WED-S maintains a persistent connection with two wireless grouping network nodes simultaneously. The wireless grouping network nodes have relay forwarding capabilities, allowing wireless terminal devices to communicate with other wired and wireless terminal devices within the vehicle. Furthermore, the wireless grouping network nodes function as gateways; multiple interconnected nodes form wired and wireless networks, enabling interconnection between devices in different vehicles.

[0095] Wireless backbone network nodes send detection signals (HELLO frames) via wired connections. Only the head node can respond, so the head node is identified and numbered 101-2-1, and the wireless grouping network is established starting from the head node.

[0096] Head node 101-2-1 can determine the MAC addresses (101-2-2 and 102-2-1) of the two wireless grouping network nodes connected to it via a wired detection signal (HELLO frame). In actual deployment, the two wireless grouping network nodes in the same car should be installed in the middle of the car, and the distance between them should not be too far.

[0097] 101-2-1 sends control packets sequentially to inform the two wired connection nodes to enter transmit mode. 101-2-1 can then calculate the RSSI corresponding to the two wireless grouping network nodes. Since 102-2-1 and 101-2-1 are far apart and there is signal attenuation due to crossing carriages, the wireless grouping network node with the larger RSSI is numbered 101-2-2, and the other is numbered 102-2-1.

[0098] By sending a detection signal (HELLO frame) via wired connection, 102-2-1 can obtain the MAC addresses of two wireless grouping network nodes (101-2-1 and 103-2-1). Similarly, by sending a detection signal (HELLO frame) via wired connection, 101-2-2 can obtain the MAC addresses of two wireless grouping network nodes (101-2-1 and 102-2-2). Based on the MAC addresses, the wireless grouping network node 101-2-1, which shares the same MAC address, is removed. The remaining two unknown wireless grouping network nodes are then numbered 103-2-1 and 102-2-2.

[0099] By sending a detection signal (HELLO frame) via wired connection, 103-2-1 can obtain the MAC addresses of two wireless grouping network nodes (102-2-1 and 104-2-1). By sending a detection signal (HELLO frame) via wired connection, 102-2-2 can obtain the MAC addresses of two wireless grouping network nodes (101-2-2 and 103-2-2). Based on the MAC address information, the two known wireless grouping network nodes 102-2-1 and 101-2-2 are identified. The remaining two unknown wireless grouping network nodes are numbered 104-2-1 and 103-2-2.

[0100] By sending a detection signal (HELLO frame) via wired connection, 104-2-1 can obtain the MAC addresses of two wireless grouping network nodes (103-2-1 and 104-2-2). Similarly, by sending a detection signal (HELLO frame) via wired connection, 103-2-2 can obtain the MAC addresses of two other wireless grouping network nodes (102-2-2 and 104-2-2). Based on the MAC address information, two known wireless grouping network nodes, 103-2-1 and 102-2-2, are identified. The remaining two unknown wireless grouping network nodes have the same MAC address. These unknown nodes are then numbered as 104-2-2. This completes the node numbering for the grouping network.

[0101] During the numbering process, information from preceding wireless grouping network nodes is passed to subsequent nodes. 104-2-2, as the last wireless grouping network node, contains information from all other wireless grouping network nodes. The physical location information of each wireless grouping network node can be found here. Figure 5 , Figure 5 This invention provides a physical location map of wireless grouping network nodes, which is derived from... Figure 5 It can be seen that the number information includes physical location information.

[0102] Because the 104-2-2 stores the MAC addresses, serial numbers, and other information of all wireless grouping network nodes, it can construct the physical and logical topology of the entire grouping network and transmit the topology information to other wireless grouping network nodes through backpropagation. The physical network topology construction process mainly involves connecting all wireless links in the grouping network. The logical network topology construction process mainly involves calculating and allocating network layer addresses and creating routing rules.

[0103] The wireless terminal sends a network distribution broadcast packet. If it receives a response packet from only one wireless grouping network node, it establishes a communication link with that node. Otherwise, it sequentially informs each wireless grouping network node to enter transmit mode, and the terminal enters receive mode, calculating the corresponding RSSI value. It establishes a mapping between wireless grouping network nodes and their RSSI values ​​and sorts the values. If it is not a wireless security terminal device, it only needs to establish a wireless link with the wireless grouping network node corresponding to the highest RSSI value. If it is a wireless security terminal device, it selects the two wireless grouping network nodes with the highest RSSI values ​​and determines whether these two nodes are in the same vehicle based on their node numbers. If they are in the same vehicle, the wireless security terminal establishes two wireless links with these two nodes. Otherwise, it selects the wireless grouping network node corresponding to the highest RSSI value to establish one link.

[0104] The following describes a train communication network construction device provided by an embodiment of the present invention. The train communication network construction device described below can be referred to in correspondence with the train communication network construction method described above.

[0105] Please refer to the details. Figure 6 , Figure 6 A schematic diagram of a train communication network construction device provided in an embodiment of the present invention may include:

[0106] The acquisition module 100 is used to acquire the wired train communication network consisting of backbone network nodes and marshalling network nodes during the initial operation of the train. Both the backbone network nodes and the marshalling network nodes have wired and wireless functions.

[0107] The numbering module 200 is used to number the nodes of the marshalling network using the wired marshalling network in the wired train communication network;

[0108] The construction module 300 is used to construct a wireless marshalling network according to the number and connect the wireless marshalling network to the train backbone network.

[0109] Based on the above embodiments, the numbering module 200 may include:

[0110] The acquisition unit is used to obtain the wired connection information of each grouping network node based on the wired grouping network;

[0111] The calculation unit is used to determine the grouping network nodes connected to each grouping network node through the wired connection information, and to calculate the wireless signal strength information of the connected grouping network nodes.

[0112] The determination and numbering unit is used to determine the physical information of each grouping network node based on the wireless signal strength information, and to number it.

[0113] Based on the above embodiments, the calculation unit and the determination and numbering unit may include:

[0114] The head node subunit is used to take the marshalling network node connected to the backbone network node as the head node.

[0115] Non-head node subunit, used to treat marshalling network nodes that are not connected to the backbone network nodes as non-head nodes;

[0116] The head node numbering subunit is used to determine the physical information of the head node based on the wired connection information and the wireless signal strength information, and to number it.

[0117] The non-head node numbering subunit is used to determine the physical information of the non-head node based on the wired connection information and the information of the numbered grouped network nodes, and to number them.

[0118] Based on the above embodiments, the train communication network construction device may further include:

[0119] An access module is used for terminal devices to access the train marshalling network through the marshalling network nodes; the terminal devices include wired terminal devices and wireless terminal devices.

[0120] Based on the above embodiments, the wireless terminal device in the access module accessing the train marshalling network through the marshalling network node may include:

[0121] The computing unit is used to calculate the wireless signal strength information of each grouping network node using the wireless terminal device;

[0122] The sorting unit is used to sort the wireless signal strength information and its corresponding grouping network nodes from high to low to obtain a sequence;

[0123] The first and second grouping network node determining unit is used to determine the first grouping network node in the sequence as the first grouping network node and the second grouping network node in the sequence as the second grouping network node.

[0124] The first connection unit is used to establish a wireless connection between the wireless terminal device and the first grouping network node when the wireless terminal device is not a wireless security terminal device.

[0125] The second connection unit is used to establish wireless connections between the wireless terminal device and the first grouping network node and the second grouping network node respectively when the wireless terminal device is a wireless security terminal device.

[0126] Based on the above embodiments, the second connection unit may include:

[0127] The first connection subunit is used to establish wireless connections with the first grouping network node and the second grouping network node respectively if the first grouping network node and the second grouping network node are in the same carriage.

[0128] The second connection subunit is used to establish a wireless connection between the wireless security terminal device and the first grouping network node if the first grouping network node and the second grouping network node are not in the same carriage.

[0129] Based on the above embodiments, the wired train formation network in the acquisition module 100 can be a train formation network consisting of 4 carriages.

[0130] It should be noted that the order of the modules and units in the above-mentioned train communication network construction device can be changed without affecting the logic.

[0131] The train communication network construction device provided in this embodiment of the invention includes an acquisition module 100 for acquiring the wired train communication network consisting of backbone network nodes and marshalling network nodes during initial train operation. Both backbone network nodes and marshalling network nodes have wired and wireless capabilities. A numbering module 200 is used to number each marshalling network node within the wired train communication network. A construction module 300 is used to construct a wireless marshalling network based on the numbering and connect the wireless marshalling network to the train backbone network. This device initializes the wired train communication network, numbers the marshalling network nodes based on the wired marshalling network, and constructs the wireless marshalling network according to the numbering, thus completing the initialization of the wireless marshalling network. This design allows for good compatibility with existing train networks, reduces maintenance costs, and improves maintenance efficiency. Furthermore, the four carriages forming a single network ensures excellent wireless communication between devices. The network nodes are numbered based on wired connection information and wireless signal strength, improving maintenance efficiency and reducing manpower. Non-head nodes can be numbered according to their information and wired connections, improving numbering efficiency. Connecting terminals to network nodes enables interconnection between terminal devices. When a wireless terminal is a wireless security terminal, connecting it to two network nodes ensures its security. Establishing wireless connections between a wireless security terminal and two network nodes in the same carriage reduces resource waste and ensures good communication performance for the secure wireless terminal.

[0132] The train communication network construction device provided in the embodiments of the present invention will be described below. The train communication network construction device described below and the train communication network construction method described above can be referred to each other.

[0133] Please refer to Figure 7 , Figure 7 A schematic diagram of a train communication network construction device provided in an embodiment of the present invention may include:

[0134] Memory 10 is used to store computer programs;

[0135] The processor 20 is used to execute computer programs to implement the above-described method for constructing a train communication network.

[0136] The system includes a memory 10, a processor 20, a communication interface 31, and a communication bus 32. The memory 10, processor 20, and communication interface 31 communicate with each other through the communication bus 32.

[0137] In this embodiment of the invention, the memory 10 is used to store one or more programs. The programs may include program code, which includes computer operation instructions. In this embodiment, the memory 10 may store programs for implementing the following functions:

[0138] The wired train communication network consisting of backbone network nodes and marshalling network nodes is obtained during the initial operation of the train. Both the backbone network nodes and the marshalling network nodes have wired and wireless functions.

[0139] Each train marshalling network node is numbered using the wired marshalling network in the wired train communication network;

[0140] A wireless train formation network is constructed based on the numbering system, and then the wireless train formation network is connected to the train backbone network.

[0141] In one possible implementation, the memory 10 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and applications required for at least one function; and the data storage area may store data created during use.

[0142] Furthermore, memory 10 may include read-only memory and random access memory, providing instructions and data to the processor. A portion of the memory may also include NVRAM. The memory stores operating systems and operating instructions, executable modules, or data structures, or subsets thereof, or extended sets thereof, wherein the operating instructions may include various operating instructions for implementing various operations. The operating system may include various system programs for implementing various basic tasks and handling hardware-based tasks.

[0143] Processor 20 can be a central processing unit (CPU), an application-specific integrated circuit, a digital signal processor, a field-programmable gate array, or other programmable logic device. Processor 20 can be a microprocessor or any conventional processor. Processor 20 can call programs stored in memory 10.

[0144] Communication interface 31 can be an interface for the communication module, used to connect with other devices or systems.

[0145] Of course, it should be noted that, Figure 7 The structure shown does not constitute a limitation on the train communication network construction device in the embodiments of this application. In practical applications, the train communication network construction device may include more than Figure 7 More or fewer components as shown, or combinations of certain components.

[0146] The storage medium provided in the embodiments of the present invention will be described below. The storage medium described below can be referred to in correspondence with the train communication network construction method described above.

[0147] The present invention also provides a storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described train communication network construction method.

[0148] The storage medium can include various media that can store program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0149] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0150] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0151] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0152] The present invention has provided a detailed description of a method, apparatus, device, and storage medium for constructing a train communication network. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for constructing a train communication network, characterized in that, include: The wired train communication network consisting of backbone network nodes and marshalling network nodes is obtained during the initial operation of the train. Both the backbone network nodes and the marshalling network nodes have wired and wireless functions. Each train marshalling network node is numbered using the wired marshalling network in the aforementioned wired train communication network; A wireless train formation network is constructed based on the numbering, and the wireless train formation network is connected to the train backbone network; The step of numbering each train marshalling network node using the wired train communication network includes: The wired connection information of each grouping network node is obtained based on the wired grouping network; The wired connection information is used to determine the grouping network nodes to which each grouping network node is connected, and the wireless signal strength information of the connected grouping network nodes is calculated. The physical information of each grouping network node is determined based on the wireless signal strength information, and then numbered. The process involves determining the connected grouping network nodes through the wired connection information and calculating the wireless signal strength information of the connected grouping network nodes; determining the physical information of each grouping network node based on the wireless signal strength information and assigning them numbers, including: The marshalling network node connected to the backbone network node is used as the head node. The marshalling network nodes that are not connected to the backbone network nodes are designated as non-head nodes. The physical information of the head node is determined based on the wired connection information and the wireless signal strength information, and then numbered. The physical information of the non-head node is determined based on the wired connection information and the information of the numbered grouped network nodes, and then numbered.

2. The train communication network construction method according to claim 1, characterized in that, Also includes: Terminal devices are connected to the train marshalling network through the marshalling network nodes; The terminal equipment includes wired terminal equipment and wireless terminal equipment.

3. The train communication network construction method according to claim 2, characterized in that, The wireless terminal device accesses the train marshalling network through the wireless marshalling network node, including: The wireless signal strength information of each grouping network node is calculated using the wireless terminal device. The wireless signal strength information and its corresponding grouping network nodes are sorted from high to low to obtain a sequence; The first grouping network node in the sequence is designated as the first grouping network node, and the second grouping network node in the sequence is designated as the second grouping network node. When the wireless terminal device is not a wireless security terminal device, the wireless terminal device establishes a wireless connection with the first grouping network node; When the wireless terminal device is a wireless security terminal device, the wireless terminal device establishes wireless connections with the first grouping network node and the second grouping network node respectively.

4. The train communication network construction method according to claim 3, characterized in that, When the wireless terminal device is a wireless security terminal device, the wireless terminal device connects to the first grouping network node and the second grouping network node respectively, including: If the first grouping network node and the second grouping network node are in the same carriage, the wireless security terminal device establishes wireless connections with the first grouping network node and the second grouping network node respectively; If the first grouping network node and the second grouping network node are not in the same carriage, the wireless security terminal device establishes a wireless connection with the first grouping network node.

5. The train communication network construction method according to claim 1, characterized in that, The wired train communication network utilizes a 4-car train formation network.

6. A train communication network construction device, characterized in that, include: The acquisition module is used to acquire the wired train communication network consisting of backbone network nodes and marshalling network nodes during the initial operation of the train. Both the backbone network nodes and the marshalling network nodes have wired and wireless functions. The numbering module is used to number the nodes of the marshalling network using the wired marshalling network in the wired train communication network. The construction module is used to construct a wireless marshalling network according to the number and connect the wireless marshalling network to the train backbone network; The numbering module includes: The acquisition unit is used to obtain the wired connection information of each grouping network node based on the wired grouping network; The calculation unit is used to determine the grouping network nodes connected to each grouping network node through the wired connection information, and to calculate the wireless signal strength information of the connected grouping network nodes. The determination and numbering unit is used to determine the physical information of each grouping network node based on the wireless signal strength information, and to number it. The calculation unit and the determination and numbering unit include: The head node subunit is used to take the marshalling network node connected to the backbone network node as the head node. Non-head node subunit, used to treat marshalling network nodes that are not connected to the backbone network nodes as non-head nodes; The head node numbering subunit is used to determine the physical information of the head node based on the wired connection information and the wireless signal strength information, and to number it. The non-head node numbering subunit is used to determine the physical information of the non-head node based on the wired connection information and the information of the numbered grouped network nodes, and to number them.

7. A train communication network construction device, characterized in that, include: Memory, used to store computer programs; A processor, configured to implement the steps of the train communication network construction method as described in any one of claims 1 to 5 when executing the computer program.

8. A storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the steps of the train communication network construction method as described in any one of claims 1 to 5.

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