Train network control system, data transmission method and device based on wireless transmission

Abstract

An embodiment of the present invention provides a train network control system, a data transmission method and an apparatus based on wireless transmission. The system includes: a wireless train backbone network and a wireless train marshalling network. The wireless train backbone network is connected to the wireless train marshalling network. Both the wireless train backbone network and the wireless train marshalling network are arranged on the current train; the wireless train backbone network includes a first backbone network node and a second backbone network node; the wireless train marshalling network includes a first marshalling network plane, a second marshalling network plane, a secure wireless terminal and a non-secure wireless terminal; the first backbone network node is connected to the first marshalling network plane, and the second backbone network node is connected to the second marshalling network plane. By applying wireless transmission technology to a train network control system composed of a two-layer communication architecture of a wireless train backbone network and a wireless train marshalling network plane, the reliability and stability of train network data transmission are improved, and high-bandwidth, low-latency network requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of rail vehicle control technology, and in particular to a train network control system based on wireless transmission, a data transmission method and a device. Background Art

[0002] As train networks increase their demand for service convergence, the amount of data carried in the network continues to grow. Traditional train-level and vehicle-level Ethernet buses are unable to meet the train network's needs for reduced wiring and lighter vehicles. Related technologies include the IEEE 802.11 protocol suite and two mainstream standards based on Long Term Evolution (LTE). However, the LTE standard only supports transmission rates of tens of Mbps and latencies of tens of milliseconds, failing to meet the high data rate requirements and demanding end-to-end transmission latency in train marshaling networks and train backbone networks. While the IEEE 802.11 protocol suite, after several modifications, can support short-distance point-to-point peer-to-peer transmission in train networks, it faces scalability issues in congested train networks. Consequently, related technologies have been unable to fully apply wireless transmission technology to train network control systems, resulting in poor reliability and stability and long latency in existing train network transmission. Summary of the Invention

[0003] One object of the present invention is to provide a train network control system based on wireless transmission, which provides technical support for the application of wireless communication in train networks by applying wireless transmission technology to a train network control system composed of a two-layer communication architecture of a wireless train backbone network and a wireless train marshaling network plane, thereby improving the reliability and stability of train network data transmission and achieving high-bandwidth, low-latency network requirements. Another object of the present invention is to provide a data transmission method that can realize data stream transmission between a wireless train backbone network and a wireless train marshaling network. Another object of the present invention is to provide a data transmission device that is applied to a wireless train backbone network and a wireless train marshaling network. Another object of the present invention is to provide a computer-readable medium. Another object of the present invention is to provide a computer device.

[0004] In order to achieve the above objectives, the present invention discloses a train network control system based on wireless transmission, the system comprising: a first backbone network and a first marshalling network, the first backbone network being connected to the first marshalling network, and the first backbone network and the first marshalling network being both arranged on the current train;

[0005] The first backbone network includes a first backbone network node and a second backbone network node;

[0006] The first marshaling network includes a first marshaling network plane and a second marshaling network plane;

[0007] The first backbone network node is connected to the first marshalling network plane, and the second backbone network node is connected to the second marshalling network plane.

[0008] Preferably, the current train includes at least one carriage;

[0009] The first marshalling network plane includes at least one first wireless access node, and each carriage corresponds to a first wireless access node;

[0010] The second marshalling network plane includes at least one second wireless access node, and each carriage corresponds to a second wireless access node.

[0011] Preferably, the first marshaling network plane further includes at least one first marshaling network switch, and each carriage corresponds to a first marshaling network switch;

[0012] The first backbone network node is connected to the first marshaling network switch by wire;

[0013] The first wireless access node in each carriage is connected to the corresponding first marshalling network switch by wire;

[0014] The second marshaling network plane further includes at least one second marshaling network switch, and each carriage corresponds to a second marshaling network switch;

[0015] The second wireless access node in each carriage is connected to the corresponding second marshalling network switch by wire;

[0016] The second backbone network node is connected to the second marshaling network switch via a wired connection.

[0017] Preferably, the system further comprises a secure wireless terminal;

[0018] The secure wireless terminal is provided with a first wireless interface and a second wireless interface;

[0019] The secure wireless terminal is wirelessly connected to the first marshaling network plane through a first wireless interface, and is wirelessly connected to the second marshaling network plane through a second wireless interface.

[0020] Preferably, the system further comprises: a non-secure wireless terminal;

[0021] The non-secure wireless terminal is connected to the first marshaling network plane through the first wireless access node; or the non-secure wireless terminal is connected to the second marshaling network plane through the second wireless access node.

[0022] Preferably, the system further comprises: a plurality of sensing devices and a data processing device;

[0023] The sensing device is wirelessly connected to the data processing device;

[0024] The data processing device is connected to the first marshaling network plane through a first wireless access node; or, the data processing device is connected to the second marshaling network plane through a second wireless access node.

[0025] Preferably, the system further comprises: a second backbone network and a second marshalling network, the second backbone network being connected to the second marshalling network, and the second backbone network and the second marshalling network being both arranged on adjacent trains to the current train;

[0026] The second backbone network includes a third backbone network node and a fourth backbone network node;

[0027] The second marshalling network includes a third marshalling network plane and a fourth marshalling network plane;

[0028] The third backbone network node is connected to the third marshalling network plane, and the fourth backbone network node is connected to the fourth marshalling network plane;

[0029] The first backbone network node is wirelessly connected to the third backbone network node, and the second backbone network node is wirelessly connected to the fourth backbone network node, so that the current train and the adjacent trains of the current train can communicate with each other wirelessly.

[0030] Preferably, the system further comprises: a secure wired terminal;

[0031] The secure wired terminal is connected to the first marshaling network plane and the second marshaling network plane respectively via wires.

[0032] Preferably, the system further comprises: a non-secure wired terminal;

[0033] The non-secure wired terminal is connected to the first marshaling network switch via a wire; or the non-secure wired terminal is connected to the second marshaling network switch via a wire.

[0034] The present invention also discloses a data transmission method, which is based on the above-mentioned train network control system based on wireless transmission, and includes:

[0035] The source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data; the transmission link is the link between the source terminal and the target terminal through the backbone network and / or the marshalling network; the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal.

[0036] Preferably, if the source terminal and the target terminal are both non-secure wireless terminals located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, a target wireless access node, and a target marshaling network switch;

[0037] The source terminal sends the transmission data to the target terminal through the transmission link, including:

[0038] The source terminal sends the transmission data to the source wireless access node corresponding to the car where it is located through wireless transmission technology;

[0039] The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link;

[0040] The source marshalling network switch sends the transmission data to the target marshalling network switch corresponding to the carriage where the target terminal is located through a wired link;

[0041] The target marshaling network switch sends the transmission data to the corresponding target wireless access node through a wired link;

[0042] The target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0043] Preferably, if both the source terminal and the target terminal are secure wireless terminals, the transmission link includes a first sub-transmission link and a second sub-transmission link, the first sub-transmission link includes a first source wireless access node, a first source marshaling network switch, a first target wireless access node, and a first target marshaling network switch; the second sub-transmission link includes a second source wireless access node, a second source marshaling network switch, a second target wireless access node, and a second target marshaling network switch;

[0044] The source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data, including:

[0045] The source terminal sends the transmission data to the first source wireless access node and the second source wireless access node corresponding to the compartment respectively through wireless transmission technology;

[0046] The first source wireless access node sends the transmission data to the corresponding first source marshaling network switch via a wired link; the first source marshaling network switch sends the transmission data to the first target marshaling network switch via a wired link; the first target marshaling network switch sends the transmission data to the first target wireless access node via a wired link; the first target wireless access node sends the transmission data to the target terminal via wireless transmission technology;

[0047] The second source wireless access node sends the transmission data to the corresponding second source marshaling network switch via a wired link; the second source marshaling network switch sends the transmission data to the second target marshaling network switch via a wired link; the second target marshaling network switch sends the transmission data to the second target wireless access node via a wired link; the second target wireless access node sends the transmission data to the target terminal via wireless transmission technology;

[0048] The target terminal determines whether the transmission time of the transmission data sent through the first sub-transmission link is less than the transmission time of the transmission data sent through the second sub-transmission link; if so, receives the transmission data sent through the first sub-transmission link and discards the transmission data sent through the second sub-transmission link; if not, receives the transmission data sent through the second sub-transmission link and discards the transmission data sent through the first sub-transmission link.

[0049] Preferably, if the source terminal is a secure wireless terminal and the target terminal is a secure wired terminal located under the same train, the transmission link includes a third sub-transmission link and a fourth sub-transmission link, the third sub-transmission link includes a third source wireless access node, a third source marshaling network switch, and a third target marshaling network switch; the fourth sub-transmission link includes a fourth source wireless access node, a fourth source marshaling network switch, and a fourth target marshaling network switch;

[0050] The source terminal sends the transmission data to the target terminal through the transmission link, including:

[0051] The source terminal sends the transmission data to the third source wireless access node and the fourth source wireless access node corresponding to the compartment respectively through wireless transmission technology;

[0052] The third source wireless access node sends the transmission data to the corresponding third source marshaling network switch via a wired link; the third source marshaling network switch sends the transmission data to the third target marshaling network switch via a wired link; the third target marshaling network switch sends the transmission data to the target terminal via a wired link;

[0053] The fourth source wireless access node sends the transmission data to the corresponding fourth source marshaling network switch via a wired link; the fourth source marshaling network switch sends the transmission data to the fourth target marshaling network switch via a wired link; the fourth target marshaling network switch sends the transmission data to the target terminal via a wired link;

[0054] The target terminal determines whether the transmission time of the transmission data sent through the third sub-transmission link is less than the transmission time of the transmission data sent through the fourth sub-transmission link; if so, receives the transmission data sent through the third sub-transmission link and discards the transmission data sent through the fourth sub-transmission link; if not, receives the transmission data sent through the fourth sub-transmission link and discards the transmission data sent through the third sub-transmission link.

[0055] Preferably, if the source terminal is a secure wireless terminal and the target terminal is a non-secure wired terminal located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, and a target marshaling network switch;

[0056] The source terminal sends the transmission data to the target terminal through the transmission link, including:

[0057] The source terminal sends the transmission data to the source wireless access node corresponding to the car where it is located through wireless transmission technology;

[0058] The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link;

[0059] The source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link;

[0060] The target marshaling network switch sends the transmission data to the target terminal through a wired link.

[0061] Preferably, if the source terminal is a terminal located under a current train and the target terminal is a terminal located under an adjacent train to the current train, the transmission link includes the current backbone network node and the target backbone network node;

[0062] The source terminal sends the transmission data to the target terminal through the transmission link, including:

[0063] The source terminal sends the pre-acquired transmission data to the corresponding current backbone network node;

[0064] The current backbone network node sends the transmission data to the target backbone network node corresponding to the adjacent train of the current train through wireless transmission technology;

[0065] The target backbone network node sends the transmission data to the target terminal.

[0066] Preferably, the method further comprises:

[0067] The sensing device collects sensing data;

[0068] The sensing device sends the sensing data to the data processing device through wireless transmission technology;

[0069] The data processing device processes the sensor data to obtain processed sensor data;

[0070] The data processing device sends the processed sensor data to the target terminal.

[0071] The present invention also discloses a data transmission device, which includes:

[0072] Transceiver unit, the source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data; the transmission link is the link between the source terminal and the target terminal through the backbone network and / or the marshalling network; the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal.

[0073] Preferably, if the source terminal and the target terminal are both non-secure wireless terminals located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, a target wireless access node, and a target marshaling network switch;

[0074] The transceiver unit uses wireless transmission technology to send the transmission data to the source wireless access node corresponding to the carriage where the source terminal is located; the source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; the source marshaling network switch sends the transmission data to the target marshaling network switch corresponding to the carriage where the target terminal is located through a wired link; the target marshaling network switch sends the transmission data to the corresponding target wireless access node through a wired link; the target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0075] Preferably, if both the source terminal and the target terminal are secure wireless terminals, the transmission link includes a first sub-transmission link and a second sub-transmission link, the first sub-transmission link includes a first source wireless access node, a first source marshaling network switch, a first target wireless access node, and a first target marshaling network switch; the second sub-transmission link includes a second source wireless access node, a second source marshaling network switch, a second target wireless access node, and a second target marshaling network switch;

[0076] The transceiver unit, the source terminal sends the transmission data to the first source wireless access node and the second source wireless access node corresponding to the compartment respectively through wireless transmission technology;

[0077] The transceiver unit, the first source wireless access node sends the transmission data to the corresponding first source marshaling network switch through a wired link; the first source marshaling network switch sends the transmission data to the first target marshaling network switch through a wired link; the first target marshaling network switch sends the transmission data to the first target wireless access node through a wired link; the first target wireless access node sends the transmission data to the target terminal through wireless transmission technology;

[0078] The transceiver unit, the second source wireless access node sends the transmission data to the corresponding second source marshaling network switch through a wired link; the second source marshaling network switch sends the transmission data to the second target marshaling network switch through a wired link; the second target marshaling network switch sends the transmission data to the second target wireless access node through a wired link; the second target wireless access node sends the transmission data to the target terminal through wireless transmission technology;

[0079] The transceiver unit and the target terminal determine whether the transmission time of the transmission data sent through the first sub-transmission link is less than the transmission time of the transmission data sent through the second sub-transmission link; if so, receive the transmission data sent through the first sub-transmission link and discard the transmission data sent through the second sub-transmission link; if not, receive the transmission data sent through the second sub-transmission link and discard the transmission data sent through the first sub-transmission link.

[0080] Preferably, if the source terminal is a secure wireless terminal and the target terminal is a secure wired terminal located under the same train, the transmission link includes a third sub-transmission link and a fourth sub-transmission link, the third sub-transmission link includes a third source wireless access node, a third source marshaling network switch, and a third target marshaling network switch; the fourth sub-transmission link includes a fourth source wireless access node, a fourth source marshaling network switch, and a fourth target marshaling network switch;

[0081] The transceiver unit, the source terminal sends the transmission data to the third source wireless access node and the fourth source wireless access node corresponding to the compartment through wireless transmission technology;

[0082] The transceiver unit, the third source wireless access node sends the transmission data to the corresponding third source marshaling network switch through a wired link; the third source marshaling network switch sends the transmission data to the third target marshaling network switch through a wired link; the third target marshaling network switch sends the transmission data to the target terminal through a wired link;

[0083] The transceiver unit, the fourth source wireless access node sends the transmission data to the corresponding fourth source marshaling network switch through a wired link; the fourth source marshaling network switch sends the transmission data to the fourth target marshaling network switch through a wired link; the fourth target marshaling network switch sends the transmission data to the target terminal through a wired link;

[0084] The transceiver unit and the target terminal determine whether the transmission time of the transmission data sent through the third sub-transmission link is less than the transmission time of the transmission data sent through the fourth sub-transmission link; if so, receive the transmission data sent through the third sub-transmission link and discard the transmission data sent through the fourth sub-transmission link; if not, receive the transmission data sent through the fourth sub-transmission link and discard the transmission data sent through the third sub-transmission link.

[0085] Preferably, if the source terminal is a secure wireless terminal and the target terminal is a non-secure wired terminal located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, and a target marshaling network switch;

[0086] The transceiver unit uses wireless transmission technology to send the transmission data to the source wireless access node corresponding to the carriage; the source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; the source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link; the target marshaling network switch sends the transmission data to the target terminal through a wired link.

[0087] Preferably, if the source terminal is a terminal located under a current train and the target terminal is a terminal located under an adjacent train to the current train, the transmission link includes the current backbone network node and the target backbone network node;

[0088] The transceiver unit sends the pre-acquired transmission data to the corresponding current backbone network node; the current backbone network node sends the transmission data to the target backbone network node corresponding to the adjacent train of the current train through wireless transmission technology; the target backbone network node sends the transmission data to the target terminal.

[0089] Preferably, the device further comprises: a collection unit and a data processing unit;

[0090] The acquisition unit, the sensor device collects sensor data;

[0091] The transceiver unit, the sensor device sends the sensor data to the data processing device through wireless transmission technology; the data processing device sends the processed sensor data to the target terminal;

[0092] The data processing unit and the data processing device perform data processing on the sensor data to obtain processed sensor data.

[0093] The present invention also discloses a computer-readable medium on which a computer program is stored. When the program is executed by a processor, the method described above is implemented.

[0094] The present invention also discloses a computer device, including a memory and a processor, wherein the memory is used to store information including program instructions, the processor is used to control the execution of program instructions, and the processor implements the above method when executing the program.

[0095] The present invention also discloses a computer program product, comprising a computer program / instruction, which implements the above method when the computer program / instruction is executed by a processor.

[0096] The train network control system based on wireless transmission provided by the present invention includes: a wireless train backbone network and a wireless train marshalling network, the wireless train backbone network is connected to the wireless train marshalling network, and the wireless train backbone network and the wireless train marshalling network are both set on the current train; the wireless train backbone network includes a first backbone network node and a second backbone network node; the wireless train marshalling network includes a first marshalling network plane, a second marshalling network plane, a secure wireless terminal and a non-secure wireless terminal; the first backbone network node is connected to the first marshalling network plane, and the second backbone network node is connected to the second marshalling network plane. By applying wireless transmission technology to the train network control system composed of a two-layer communication architecture of the wireless train backbone network and the wireless train marshalling network plane, the reliability and stability of the train network data transmission are improved, and the network requirements of high bandwidth and low latency are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] 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.

[0098] Figure 1 A schematic diagram of the network architecture of a train backbone network based on wireless transmission provided by an embodiment of the present invention;

[0099] Figure 2 A schematic diagram of a network architecture of a train marshaling network based on wireless transmission provided by an embodiment of the present invention;

[0100] Figure 3 A schematic diagram of a network architecture of a train sensor network based on wireless transmission provided by an embodiment of the present invention;

[0101] Figure 4 A flowchart of a data transmission method provided by an embodiment of the present invention;

[0102] Figure 5 A flowchart of another data transmission method provided by an embodiment of the present invention;

[0103] Figure 6 A flowchart of another data transmission method provided by an embodiment of the present invention;

[0104] Figure 7 A flowchart of another data transmission method provided by an embodiment of the present invention;

[0105] Figure 8 A flowchart of another data transmission method provided by an embodiment of the present invention;

[0106] Figure 9 A schematic structural diagram of a data transmission device provided in an embodiment of the present invention;

[0107] Figure 10 A schematic structural diagram of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0108] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the 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.

[0109] In order to facilitate the understanding of the technical solution provided by this application, the relevant contents of the technical solution of this application are first explained below. The future train network has the demand to reduce wiring harnesses and lightweight vehicles. Research on high-bandwidth, low-latency, and highly reliable wireless transmission technology will effectively solve the bottleneck of train network information transmission. 5G-NR is the evolution of LTE technology. Its data rate can reach Gbps, the transmission delay is in the millisecond level, and it covers the transmission methods of medium and low frequency bands below 6GHz and millimeter wave bands. Among them, LTE-V2X and NR-V2X, the evolved versions of LTE and NR for short-distance and low-latency communication between vehicles, are potential wireless transmission technologies that can meet the transmission needs of train network systems. In addition, the IEEE protocol family launched 802.11bd to benchmark the 5G-NR system, providing higher data rates and supporting millimeter wave band communications.

[0110] The wireless transmission architecture of the train network control system based on wireless transmission technology constructed by the present invention includes a wireless train backbone network (WLTB) and a wireless train formation network (WLCN). Data transmission is achieved in the wireless train backbone network and the wireless train formation network through wireless transmission technologies, including but not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee, and Bluetooth Low Energy (BLE).

[0111] 1) LTE / 5G-NR series of technologies: In addition to traditional LTE and 5G cellular network technologies, it also includes improved versions for device-to-device communications, such as LTE-V2X and NR-V2X. LTE-V2X technology is designed for low-latency short-distance communications, supports frequency reuse, and can use a deterministic scheduler. NR-V2X transmission technology is an evolved version of LTE-V2X. Its transmission latency is at the millisecond level, and its data rate can reach Gbps. It introduces a flexible wireless frame structure and subcarrier setting to support high-speed mobility characteristics, and supports non-periodic signals or burst signals triggered by events. The LTE / 5G-NR series of technologies are mainly used to meet the transmission of train-level and vehicle-level data of train network control systems.

[0112] 2) WLAN technologies: In addition to 802.11ac (Wi-Fi 5) and 802.11ax (Wi-Fi 6), which are based on the 802.11 family of protocols, these technologies also include improved technologies for high-mobility in-vehicle environments, such as 802.11p (ITS-G5 and DSRC) and 802.11BD. 802.11p (ITS-G5 and DSRC) technology originates from IEEE 802.11a and utilizes an OFDM-based physical layer. Data scheduling utilizes a contention-based CSMA-CA access mechanism, resulting in a data transmission rate of 27 Mbps. IEEE 802.1BD technology builds on IEEE 802.11p technology and integrates improvements to IEEE 802.11ax technology, converting IEEE 802.11ax to a version suitable for high-mobility in-vehicle environments. IEEE 802.1BD technology supports data rates of up to 86 Mbps in the 20 MHz band and single-stream data transmission. In the 160 MHz band and with eight spatial streams, the data rate can be increased to 6.9 Gbps, with millisecond-level transmission latency. WLAN technologies are primarily used for train-level and vehicle-level data transmission in train network control systems.

[0113] 3) Wireless Personal Area Network (WPAN) technologies: For example, ZigBee technology, based on IEEE 802.15.4, uses a contention-based CSMA-CA access mechanism for data scheduling, with transmission rates in the kilobits per second and latency under 50ms. Another example of a WPAN is Bluetooth Low Energy (BLE), which uses 40 narrowband 2MHz bandwidths for data transmission and employs frequency hopping to reduce interference. Its data transmission rate is around 2Mbps, with latency under 50ms. This type of technology is primarily used to connect sensor devices to wireless access nodes on trains.

[0114] 4) Millimeter-wave communication: This primarily utilizes the commercially deployed 28 GHz frequency band. Its available spectrum bandwidth can be increased to 1 GHz through technologies such as spectrum aggregation, enabling the transmission of large data streams within train networks. However, the inherent physical characteristics of millimeter-wave communication, such as high path loss, high attenuation, and susceptibility to obstruction, can lead to unstable communication link quality. Therefore, millimeter-wave communication utilizes beamforming technology for directional transmission, compensating for communication link transmission losses through beam gain. Furthermore, large-scale antenna technology enables parallel transmission of multiple beams to meet the high data rate requirements of train network systems.

[0115] The present invention selects one or several reliable wireless transmission technologies and applies them to the train network control system, data transmission method and device based on wireless transmission provided by the present invention.

[0116] Take two adjacent trains as an example. Figure 1 A schematic diagram of a network architecture of a train backbone network based on wireless transmission provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the architecture includes a first backbone network and a first marshalling network, the first backbone network is connected to the first marshalling network, and the first backbone network and the first marshalling network are both set on the current train 1.

[0117] The first backbone network includes a first backbone network node 101 and a second backbone network node 102 .

[0118] The first marshaling network includes a first marshaling network plane 110 and a second marshaling network plane 120 .

[0119] The first backbone network node 101 is connected to the first marshaling network plane 110 , and the second backbone network node 102 is connected to the second marshaling network plane 120 .

[0120] The system further includes: a second backbone network and a second marshalling network, the second backbone network is connected to the second marshalling network, and the second backbone network and the second marshalling network are both set on an adjacent train 2 of the current train 1.

[0121] The second backbone network includes a third backbone network node 201 and a fourth backbone network node 202 .

[0122] The second marshaling network includes a third marshaling network plane 210 and a fourth marshaling network plane 220 .

[0123] The third backbone network node 201 is connected to the third marshalling network plane 210 , and the fourth backbone network node 202 is connected to the fourth marshalling network plane 220 .

[0124] The first backbone network node 101 is wirelessly connected to the third backbone network node 201 , and the second backbone network node 102 is wirelessly connected to the fourth backbone network node 202 , so that the current train 1 can communicate wirelessly with the adjacent train 2 of the current train 1 .

[0125] The present invention implements wireless train backbone network communication by adopting a point-to-point wireless communication mode. Wireless communication devices are installed at the nodes of the wireless train backbone network to realize data exchange between two trains. The use of wireless transmission technology in the wireless train backbone network requires the following functional adaptation:

[0126] 1) The wireless transmission technology used in the wireless train backbone network should be able to adjust wireless link parameters such as transmit and receive power, antenna gain, etc., so that the equipment can operate normally at a transmission distance of 1-10m, and avoid glass attenuation of the link when the train is reconnected.

[0127] 2) The transmission frequency band of the wireless train backbone network can be deployed in the low-frequency band below 6 GHz, with typical deployment bands such as 2.4 GHz and 5.8 GHz. Wireless transmission in these frequency bands can make the air interface link more penetrable and can achieve good obstacle avoidance in the train transmission environment.

[0128] 3) The wireless train backbone network can also be deployed in frequency bands above 6 GHz, using millimeter wave bands for data transmission. Typical deployment bands include 28 GHz and 60 GHz. Multi-band spectrum aggregation in these bands can increase the available bandwidth to 1 GHz to 2 GHz, meeting the needs of large data flow transmission within the train network.

[0129] 4) The wireless train backbone network's transmission technology supports a variety of bandwidths, including but not limited to 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, and 40MHz. Furthermore, carrier aggregation can be used to aggregate carriers across different frequency bands, enabling multi-band transmission. Under normal signal-to-noise ratio (SNR) and channel quality indicator (CQI), carrier aggregation can achieve transmission rates of at least 100Mbps, meeting the bandwidth requirements of video surveillance and multimedia data.

[0130] 5) The wireless transmission technology used in the wireless train backbone network can support dynamic adjustment of multiple channel coding rates such as 256QAM, 64QAM, 16QAM, quadrature phase shift keying (QPSK) and binary phase shift keying (BPSK) to adapt to sudden changes in channel conditions when the multiplexed train is running.

[0131] 6) If the wireless train backbone network is deployed in frequency bands below 6 GHz, omnidirectional antennas should be used to support transmission between train wireless backbone network nodes, reducing the cost of antenna installation on the train. If the wireless train backbone network is deployed in the millimeter wave frequency band, phased array antennas should be deployed for beamforming to achieve directional transmission. Millimeter wave equipment should support automatic beam alignment and beam tracking.

[0132] 7) The transmission delay of the wireless transmission technology used in the wireless train backbone network should be kept within 20ms to meet the transmission of message data, control data and monitoring data between multiple trains.

[0133] 8) The wireless train backbone network should use telecommunications-grade encryption technology for data transmission, including but not limited to Zu Chongzhi Algorithm Suite (ZUC), SNOW3G, Advanced Encryption Standard (AES) and other encryption methods to enhance the security of data transmitted over the link.

[0134] In this embodiment of the present invention, the wireless train backbone network enables short-range, point-to-point wireless communication between wireless train backbone network nodes on adjacent trains during train reconnection. This primarily carries data forwarding between reconnected trains, enabling interoperability between trains. The wireless train backbone network transmits large amounts of control data, video surveillance data, and entertainment and multimedia data. Control data is sent periodically, requiring high real-time data packets, while video and multimedia data require high transmission bandwidth.

[0135] Take a train as an example. Figure 2 A schematic diagram of a network architecture of a train marshaling network based on wireless transmission provided by an embodiment of the present invention.

[0136] like Figure 2 As shown, the train includes at least one carriage, Figure 2 Taking the current train 1 including three carriages as an example, the current train 1 includes carriage 01, carriage 02 and carriage 03. It is worth noting that Figure 2 Only three carriages are taken as an example. In actual practice, a train usually includes eight carriages.

[0137] In the embodiment of the present invention, the first marshaling network plane 110 further includes at least one first wireless access node (WAP), and each carriage corresponds to a first wireless access node, such as Figure 2 As shown, the first marshalling network plane 110 includes three first wireless access nodes, car 01 corresponds to the first wireless access node W1, car 02 corresponds to the first wireless access node W2, and car 03 corresponds to the first wireless access node W3.

[0138] In the embodiment of the present invention, the second marshaling network plane 120 further includes at least one second wireless access node (WAP), and each carriage corresponds to a second wireless access node, such as Figure 2 As shown, the second marshalling network plane 120 includes three second wireless access nodes, car 01 corresponds to the second wireless access node W4, car 02 corresponds to the second wireless access node W5, and car 03 corresponds to the second wireless access node W6.

[0139] The first marshaling network plane 110 includes at least one first marshaling network switch, and each carriage corresponds to a first marshaling network switch, such as Figure 2 As shown, the first marshaling network plane 110 includes three first marshaling network switches, car 01 corresponds to the first marshaling network switch 111 , car 02 corresponds to the first marshaling network switch 112 , and car 03 corresponds to the first marshaling network switch 113 .

[0140] The first backbone network node 101 is connected to the first marshaling network switch via a wired connection to achieve interconnection between the first backbone network and the first marshaling network plane 110 . Figure 2 Taking the wired connection between the first backbone network node 101 and the first marshalling network switch 113 corresponding to the carriage 03 as an example, in actual applications, the marshalling network switch corresponding to the head carriage or the rear carriage of the train is usually selected to be wired connected to the backbone network node to realize multi-level wireless data transmission in the train network control system.

[0141] The second marshaling network plane 120 includes at least one second marshaling network switch, and each carriage corresponds to a second marshaling network switch. Figure 2 As shown, the second marshaling network plane 120 includes three second marshaling network switches, car 01 corresponds to the second marshaling network switch 121 , car 02 corresponds to the second marshaling network switch 122 , and car 03 corresponds to the second marshaling network switch 123 .

[0142] The second backbone network node 102 is connected to the second braided network switch via a wired connection to implement interconnection between the first backbone network and the second braided network plane 120 . Figure 2 Taking the wired connection between the second backbone network node 102 and the second marshalling network switch 121 corresponding to the carriage 01 as an example, in actual applications, the marshalling network switch corresponding to the head carriage or the rear carriage of the train is usually selected to be wired connected to the backbone network node to realize multi-level wireless data transmission in the train network control system.

[0143] like Figure 2 As shown, the first wireless access node in each carriage is connected to the corresponding first marshaling network switch by wired connection to access the first marshaling network plane 110, that is, interconnected with the existing marshaling network switch by wired connection. Figure 2 As shown, the first wireless access node W1 of car 01 is connected to the corresponding first marshalling network switch 111 by wire, the first wireless access node W2 of car 02 is connected to the corresponding first marshalling network switch 112 by wire, and the first wireless access node W3 of car 03 is connected to the corresponding first marshalling network switch 113 by wire.

[0144] like Figure 2As shown, the second wireless access node in each carriage is connected to the corresponding second marshalling network switch by wired connection to access the second marshalling network plane 120, that is, interconnected with the existing marshalling network switch by wired connection. Figure 2 As shown, the second wireless access node W4 of car 01 is connected to the corresponding second marshaling network switch 121 by wire, the second wireless access node W5 of car 02 is connected to the corresponding second marshaling network switch 122 by wire, and the second wireless access node W6 of car 03 is connected to the corresponding second marshaling network switch 123 by wire.

[0145] like Figure 2 As shown, the system also includes: a first backbone network and a secure wireless terminal (WEP-S) 200 set on the current train 1. The secure wireless terminal 200 refers to a device with a higher security level on the train, which may include a communication controller (CCU) and an input / output module (IOM).

[0146] The first marshalling network includes a first marshalling network plane 110 and a second marshalling network plane 120 . The first marshalling network plane 110 and the second marshalling network plane 120 are two redundant wireless train marshalling network planes.

[0147] The secure wireless terminal 200 is provided with a first wireless interface and a second wireless interface. The secure wireless terminal 200 is wirelessly connected to the first marshaling network plane 110 via the first wireless interface and is wirelessly connected to the second marshaling network plane 120 via the second wireless interface.

[0148] In the embodiment of the present invention, the secure wireless terminal 200 is connected to the first marshaling network plane 110 and the second marshaling network plane 120 at the same time, which can improve the redundancy and reliability of the network architecture. At the same time, the first wireless interface and the second wireless interface are pre-set for wireless data transmission.

[0149] In this embodiment of the present invention, the system also includes a non-secure wireless terminal (WEP). A non-secure wireless terminal refers to a non-safety-related terminal on the train, such as air conditioning, lighting, and other equipment with a lower security level. A non-secure wireless terminal only needs to connect to a wireless access node and access one of the wireless train marshaling network planes. Specifically, the non-secure wireless terminal connects to the first marshaling network plane via a first wireless access node; alternatively, the non-secure wireless terminal connects to the second marshaling network plane via a second wireless access node.

[0150] Figure 2Taking the example that each carriage includes two non-secure wireless terminals and the two non-secure wireless terminals are respectively connected to two marshalling network planes, carriage 01 includes a non-secure wireless terminal W01 and a non-secure wireless terminal W04, the non-secure wireless terminal W01 is connected to the first marshalling network plane 110 through the first wireless access node W1, and the non-secure wireless terminal W04 is connected to the second marshalling network plane 120 through the second wireless access node W4; carriage 02 includes a non-secure wireless terminal W02 and a non-secure wireless terminal W05, the non-secure wireless terminal W02 is connected to the first marshalling network plane 110 through the first wireless access node W2, and the non-secure wireless terminal W05 is connected to the second marshalling network plane 120 through the second wireless access node W5; carriage 03 includes a non-secure wireless terminal W03 and a non-secure wireless terminal W06, the non-secure wireless terminal W03 is connected to the first marshalling network plane 110 through the first wireless access node W3, and the non-secure wireless terminal W06 is connected to the second marshalling network plane 120 through the second wireless access node W6.

[0151] In the embodiment of the present invention, the system further includes: a safety wired terminal 300. The safety wired terminal 300 is a device with a higher safety level on the train.

[0152] The secure wired terminal 300 is wiredly connected to the first and second marshaling network planes 110 and 120. Connecting the secure wired terminal 300 to both the first and second marshaling network planes 110 and 120 improves the redundancy and reliability of the network architecture and provides a wired channel for data transmission.

[0153] In the embodiment of the present invention, the system further includes: a non-secure wired terminal L1. The non-secure wired terminal L1 is connected to the first marshaling network switch via a wired connection; or the non-secure wired terminal L1 is connected to the second marshaling network switch via a wired connection. Figure 2 Taking the wired connection between the non-safety wired terminal L1 and the first marshalling network switch 112 corresponding to the carriage 02 as an example, in actual applications, a marshalling network switch may be wired to multiple wired terminals; the non-safety wired terminal can be wired to the marshalling network switch corresponding to the carriage where it is located according to actual conditions to realize data transmission in the train network control system.

[0154] The present invention realizes the communication of the wireless train marshaling network by adopting the point-to-multipoint wireless communication mode in the wireless transmission technology. By adding wireless access nodes supporting point-to-multipoint communication and wireless terminals supporting point-to-multipoint communication into the wireless train marshaling network, the interaction between the wireless access nodes and the wireless terminals can be realized.

[0155] The wireless transmission technology used in the wireless train marshaling network requires the following functional adaptation:

[0156] 1) The wireless train marshaling network can adjust wireless link parameters such as the transmit and receive power, antenna gain, and other wireless link parameters of wireless access nodes and wireless terminals to enable the equipment to operate normally within a transmission distance of 1-50m. At the same time, it can establish wireless communication links in complex environments and cope with reflections from metal structures and cabinets, interference from passenger mobile devices, and so on.

[0157] 2) The transmission frequency band of the wireless train marshaling network can be deployed in the low frequency band below 6 GHz, with typical deployment frequency bands such as 2.4 GHz and 5.8 GHz. The wireless access nodes in two adjacent carriages should use different wireless transmission channels for transmission to avoid the problem of co-frequency interference between the wireless access nodes in the two carriages.

[0158] 3) The transmission frequency band of the wireless train marshaling network can be deployed in the millimeter wave band, with typical deployment bands including 28GHz and 60GHz. In these bands, multi-band spectrum aggregation can be used to increase the available bandwidth to 1GHz-2GHz, meeting the transmission of large data streams in the train network. Millimeter wave equipment requires the deployment of phased array antennas that support automatic alignment and beam tracking.

[0159] 4) The wireless transmission technology used in the wireless train marshaling network can be configured with a variety of bandwidths, including but not limited to 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, 40MHz, etc. At the same time, carrier aggregation technology can be used to aggregate carriers on different frequency bands to achieve multi-band aggregated transmission. The wireless access nodes in the wireless train marshaling network should be able to support the access of multiple wireless terminals at the same time, and the transmission bandwidth of the wireless access nodes is shared by multiple wireless terminals. When the signal-to-noise ratio (SNR) and channel quality indicator (CQI) are normal, the transmission rate of the entire wireless train marshaling network must reach at least 100Mbps. The wireless access nodes need to use resource scheduling algorithms to ensure the lower limit of the bandwidth of each wireless transmission link, ensuring that the minimum transmission rate of each wireless terminal can reach 10Mbps when multiple wireless terminals are connected simultaneously.

[0160] 5) The wireless transmission technology used in the wireless train marshaling network should be able to support dynamic adjustment of multiple channel coding rates such as 256QAM, 64QAM, 16QAM, QPSK and binary phase shift keying (BPSK) to adapt to sudden changes in channel conditions during train operation.

[0161] 6) The transmission delay of the point-to-multipoint wireless transmission technology used in the wireless train marshaling network should be kept within 20ms to meet the transmission of message data, control data and monitoring data within the marshaling network.

[0162] 7) The wireless train marshaling network should adopt telecommunications-grade encryption technology, including but not limited to ZUC, SNOW3G, AES and other encryption methods, to enhance the security of data transmitted over the link.

[0163] In an embodiment of the present invention, the wireless train marshaling network includes communications within each marshaling, and includes communications between the wireless train marshaling network and the wireless train backbone network. The main difference between the wireless train marshaling network and the wireless train backbone network is that it has a higher requirement for the number of wireless nodes. At the same time, the wireless train marshaling network needs to operate in a more complex propagation environment, such as reflections from metal structures and cabinets, interference from passengers' mobile devices, etc. From the perspective of each carriage, the wireless train marshaling network is a star network consisting of a wireless access node and multiple wireless terminals. The wireless access node has a gateway function and can support multiple wireless terminal nodes at the same time. The wireless access node needs to have a broadcast or multicast function and support the monitoring of broadcasts or multicasts by service nodes. In addition, the wireless access node can also adjust the rate according to the needs of the wireless terminal. The main data transmitted by the wireless train marshaling network includes vehicle control data, maintenance data, safety monitoring data, multimedia data, etc. within the traction unit.

[0164] Take the first marshaling network plane of a train as an example, Figure 3 A network architecture diagram of a train sensor network based on wireless transmission provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the system further includes: a plurality of sensing devices and a data processing device D1. Figure 3 Taking three sensor devices as an example, including sensor device S1, sensor device S2 and sensor device S3, in actual application, the sensor devices can be set according to actual needs, and different sensor devices collect train status data according to their own types.

[0165] The data processing device D1 has the function of collecting data collected by the sensor device and processing the collected data. It is worth noting that the specific processing of the data can be set according to actual needs, and the embodiment of the present invention does not limit this.

[0166] In the embodiment of the present invention, the sensor device is wirelessly connected to the data processing device D1, such as Figure 3 As shown, the sensor device S1 is wirelessly connected to the data processing device D1, the sensor device S2 is wirelessly connected to the data processing device D1, and the sensor device S3 is wirelessly connected to the data processing device D1.

[0167] The data processing device D1 is connected to the first marshaling network plane 110 through a first wireless access node; alternatively, the data processing device D1 is connected to the second marshaling network plane 120 through a second wireless access node. Figure 3Taking the example of the data processing device D1 being connected to the first marshalling network plane 110 through the first wireless access node W1 corresponding to the carriage 01, in actual application, the data processing device D1 can also access the first marshalling network plane 110 and / or the second marshalling network plane 120 through other wireless access nodes, which is not limited in this embodiment of the present invention.

[0168] In an embodiment of the present invention, the sensing device aggregates the collected data to the data processing device D1 through wireless transmission technology. The data processing device D1 processes the aggregated data to obtain processed sensing data, and sends the processed sensing data to the first wireless access node corresponding to the carriage through wireless transmission technology, so as to perform subsequent data transmission and data processing as needed.

[0169] In the embodiment of the present invention, the wireless technology used in the wireless link from the sensor device to the data processing device D1 with aggregation and processing functions should include the following characteristics:

[0170] 1) If the required transmission rate of the sensor device is relatively low, only in the order of kbps or less than 10 Mbps, wireless personal area network transmission technology can be used.

[0171] 2) The wireless transmission technology used should have a certain degree of penetration. This is because wireless sensors are often installed in various locations, including inside the train, outside the train, and on both sides of the wheels. The wireless transmission technology used should be able to achieve real-time and stable transmission by adjusting wireless link parameters such as the wireless terminal's transmit power and antenna gain.

[0172] 3) The wireless devices used in this wireless technology should be relatively small to facilitate flexible distribution.

[0173] 4) The wireless devices used in this wireless technology should have low power consumption, such as a transmission power of 1mW.

[0174] In the embodiment of the present invention, the train network control system adopts a wireless communication architecture to break the deep coupling relationship between traditional wiring harness design, production, deployment, installation, maintenance and vehicle structure, reduce the difficulty of on-site wiring, save cables, achieve car weight reduction, and improve the lightweight level of the car body; the train network control system adopts a two-layer communication architecture of wireless train backbone network and wireless train marshalling network, which can be compatible with the existing train network architecture and flexibly adapt to the communication network architecture of different trains in the future, making the train network control system architecture more flexible, stable and reliable.

[0175] The train network control system based on wireless transmission provided by the present invention includes: a wireless train backbone network and a wireless train marshalling network, the wireless train backbone network is connected to the wireless train marshalling network, and the wireless train backbone network and the wireless train marshalling network are both set on the current train; the wireless train backbone network includes a first backbone network node and a second backbone network node; the wireless train marshalling network includes a first marshalling network plane, a second marshalling network plane, a secure wireless terminal and a non-secure wireless terminal; the first backbone network node is connected to the first marshalling network plane, and the second backbone network node is connected to the second marshalling network plane. By applying wireless transmission technology to the train network control system composed of a two-layer communication architecture of the wireless train backbone network and the wireless train marshalling network plane, the reliability and stability of the train network data transmission are improved, and the network requirements of high bandwidth and low latency are achieved.

[0176] It is worth mentioning that Figures 1 to 3 The structure shown is Figures 4 to 8 The application basis of the data transmission method shown will not be repeated here.

[0177] The following uses a data transmission device as an example to illustrate the implementation process of the data transmission method provided by the embodiment of the present invention. It is understandable that the execution subject of the data transmission method provided by the embodiment of the present invention includes but is not limited to the data transmission device.

[0178] The data transmission method provided in an embodiment of the present invention is based on the above-mentioned train network control system based on wireless transmission, and the method includes:

[0179] The source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data; the transmission link is the link between the source terminal and the target terminal through the backbone network and / or the marshalling network.

[0180] Among them, the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal.

[0181] When the transmission scenario is a non-secure wireless terminal transmitting data to a non-secure wireless terminal, that is, the source terminal and the target terminal are both non-secure wireless terminals located under the same train, the transmission link includes the source wireless access node, the source marshaling network switch, the target wireless access node and the target marshaling network switch. Figure 4 A flowchart of a data transmission method provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, the method includes:

[0182] Step 101: The source terminal sends transmission data to the source wireless access node corresponding to the compartment where it is located through wireless transmission technology.

[0183] In the embodiment of the present invention, the source terminal is a terminal that sends transmission data, and the source wireless access node is a wireless access node corresponding to the carriage where the source terminal is located.

[0184] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0185] Step 102: The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link.

[0186] In the embodiment of the present invention, the source marshalling network switch is the marshalling network switch corresponding to the carriage where the source terminal is located.

[0187] Step 103: The source marshalling network switch sends the transmission data to the target marshalling network switch corresponding to the carriage where the target terminal is located through a wired link.

[0188] In the embodiment of the present invention, the target terminal is a terminal that receives transmitted data, and the target marshalling network switch is a marshalling network switch corresponding to the carriage where the target terminal is located.

[0189] Step 104: The target marshaling network switch sends the transmission data to the corresponding target wireless access node through a wired link.

[0190] In the embodiment of the present invention, the target wireless access node is a wireless access node of a marshalling network switch corresponding to the carriage where the target terminal is located.

[0191] Step 105: The target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0192] When the transmission scenario is that a secure wireless terminal transmits data to a secure wireless terminal, that is, both the source terminal and the target terminal are secure wireless terminals, the transmission link includes a first sub-transmission link and a second sub-transmission link. The first sub-transmission link includes a first source wireless access node, a first source marshaling network switch, a first target wireless access node, and a first target marshaling network switch; the second sub-transmission link includes a second source wireless access node, a second source marshaling network switch, a second target wireless access node, and a second target marshaling network switch. Figure 5 A flowchart of another data transmission method provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, the method includes:

[0193] Step 201: The source terminal sends transmission data to the first source wireless access node and the second source wireless access node corresponding to the compartment where the terminal is located respectively through wireless transmission technology.

[0194] In the embodiment of the present invention, the source terminal is a terminal that sends transmission data, and the first source wireless access node and the second source wireless access node are both wireless access nodes corresponding to the carriage where the source terminal is located. The first source wireless access node is located in the first sub-transmission link, and the second source wireless access node is located in the second sub-transmission link.

[0195] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0196] Step 202: The first source wireless access node sends the transmission data to the corresponding first source marshaling network switch via a wired link; the first source marshaling network switch sends the transmission data to the first target marshaling network switch via a wired link; the first target marshaling network switch sends the transmission data to the first target wireless access node via a wired link; the first target wireless access node sends the transmission data to the target terminal via wireless transmission technology.

[0197] In the embodiment of the present invention, the first source marshalling network switch is a marshalling network switch corresponding to the carriage where the source terminal is located, and the first source marshalling network switch is located in the first sub-transmission link.

[0198] In the embodiment of the present invention, the first target marshalling network switch is the marshalling network switch corresponding to the carriage where the target terminal is located, and the first target marshalling network switch is located in the first sub-transmission link.

[0199] In the embodiment of the present invention, the first target wireless access node is a wireless access node corresponding to the carriage where the target terminal is located, and the first target wireless access node is located in the first sub-transmission link.

[0200] In the embodiment of the present invention, the target terminal is a terminal that receives transmission data.

[0201] Step 203: The second source wireless access node sends the transmission data to the corresponding second source marshaling network switch through a wired link; the second source marshaling network switch sends the transmission data to the second target marshaling network switch through a wired link; the second target marshaling network switch sends the transmission data to the second target wireless access node through a wired link; the second target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0202] In the embodiment of the present invention, the second source marshalling network switch is the marshalling network switch corresponding to the carriage where the source terminal is located, and the second source marshalling network switch is located in the second sub-transmission link.

[0203] In the embodiment of the present invention, the second target marshalling network switch is the marshalling network switch corresponding to the carriage where the target terminal is located, and the second target marshalling network switch is located in the second sub-transmission link.

[0204] In the embodiment of the present invention, the second target wireless access node is a wireless access node corresponding to the carriage where the target terminal is located, and the second target wireless access node is located in the second sub-transmission link.

[0205] Step 204: The target terminal determines whether the transmission time of the transmission data sent through the first sub-transmission link is less than the transmission time of the transmission data sent through the second sub-transmission link; if so, the target terminal receives the transmission data sent through the first sub-transmission link and discards the transmission data sent through the second sub-transmission link; if not, the target terminal receives the transmission data sent through the second sub-transmission link and discards the transmission data sent through the first sub-transmission link.

[0206] It is worth noting that the first sub-transmission link and the second sub-transmission link should comply with the functional adaptation requirements described in the train network control system based on wireless transmission technology.

[0207] In an embodiment of the present invention, in order to improve the redundancy and reliability of the network, the secure wireless terminal simultaneously accesses the first marshaling network plane and the second marshaling network plane to perform redundant data transmission, and the transmission data sent through the first sub-transmission link is the same as the transmission data sent through the second sub-transmission link.

[0208] Specifically, if the transmission time of the transmission data sent through the first sub-transmission link is less than the transmission time of the transmission data sent through the second sub-transmission link, it indicates that the transmission data has been successfully transmitted through the first sub-transmission link, and the transmission data received later through the second sub-transmission link is redundant data, then the transmission data sent through the first sub-transmission link is received and saved and the transmission data sent through the second sub-transmission link is discarded; if the transmission time of the transmission data sent through the first sub-transmission link is not less than the transmission time of the transmission data sent through the second sub-transmission link, it indicates that the transmission data has been successfully transmitted through the second sub-transmission link, and the transmission data received later through the first sub-transmission link is redundant data, then the transmission data sent through the second sub-transmission link is received and saved and the transmission data sent through the first sub-transmission link is discarded.

[0209] It's worth noting that because the secure wireless terminal simultaneously accesses the first and second grouping network planes for redundant data transmission, there's a time difference between receiving data over the two transmission links. If data has already been successfully transmitted over one transmission link, and the subsequent data received over the other transmission link is redundant, the first transmitted data is received and stored, while the later transmitted data is discarded.

[0210] When the transmission scenario is data transmission from a secure wireless terminal to a secure wired terminal, that is, the source terminal is a secure wireless terminal and the target terminal is a secure wired terminal located under the same train, the transmission link includes a third sub-transmission link and a fourth sub-transmission link. The third sub-transmission link includes a third source wireless access node, a third source marshaling network switch, and a third target marshaling network switch; the fourth sub-transmission link includes a fourth source wireless access node, a fourth source marshaling network switch, and a fourth target marshaling network switch. Figure 6 A flowchart of another data transmission method provided by an embodiment of the present invention is shown in FIG. Figure 6 As shown, the method includes:

[0211] Step 301: The source terminal sends transmission data to the third source wireless access node and the fourth source wireless access node corresponding to the compartment respectively through wireless transmission technology.

[0212] In the embodiment of the present invention, the source terminal is a terminal that sends transmission data, the third source wireless access node and the third source wireless access node are both wireless access nodes corresponding to the carriage where the source terminal is located. The third source wireless access node is located in the third sub-transmission link, and the fourth source wireless access node is located in the fourth sub-transmission link.

[0213] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0214] Step 302: The third source wireless access node sends the transmission data to the corresponding third source marshaling network switch via a wired link; the third source marshaling network switch sends the transmission data to the third target marshaling network switch via a wired link; the third target marshaling network switch sends the transmission data to the target terminal via a wired link.

[0215] In the embodiment of the present invention, the third source marshalling network switch is the marshalling network switch corresponding to the carriage where the source terminal is located, and the third source marshalling network switch is located in the third sub-transmission link.

[0216] In the embodiment of the present invention, the third target marshalling network switch is the marshalling network switch corresponding to the carriage where the target terminal is located, and the third target marshalling network switch is located in the third sub-transmission link.

[0217] In the embodiment of the present invention, the target terminal is a terminal that receives transmission data.

[0218] Step 303: The fourth source wireless access node sends the transmission data to the corresponding fourth source marshaling network switch via a wired link; the fourth source marshaling network switch sends the transmission data to the fourth target marshaling network switch via a wired link; the fourth target marshaling network switch sends the transmission data to the target terminal via a wired link.

[0219] In the embodiment of the present invention, the fourth source marshaling network switch is the marshaling network switch corresponding to the carriage where the source terminal is located, and the fourth source marshaling network switch is located in the fourth sub-transmission link.

[0220] In the embodiment of the present invention, the fourth target marshaling network switch is the marshaling network switch corresponding to the carriage where the target terminal is located, and the fourth target marshaling network switch is located in the fourth sub-transmission link.

[0221] Step 304: The target terminal determines whether the transmission time of the transmission data sent through the third sub-transmission link is less than the transmission time of the transmission data sent through the fourth sub-transmission link; if so, the target terminal receives the transmission data sent through the third sub-transmission link and discards the transmission data sent through the fourth sub-transmission link; if not, the target terminal receives the transmission data sent through the fourth sub-transmission link and discards the transmission data sent through the third sub-transmission link.

[0222] It is worth noting that the third sub-transmission link and the fourth sub-transmission link should comply with the functional adaptation requirements described in the train network control system based on wireless transmission technology.

[0223] In an embodiment of the present invention, in order to improve the redundancy and reliability of the network, the secure wired terminal is simultaneously connected to the first marshalling network plane and the second marshalling network plane for redundant data transmission, and the transmission data sent through the third sub-transmission link is the same as the transmission data sent through the fourth sub-transmission link.

[0224] Specifically, if the transmission time of the transmission data sent through the third sub-transmission link is less than the transmission time of the transmission data sent through the fourth sub-transmission link, it indicates that the transmission data has been successfully transmitted through the third sub-transmission link, and the transmission data received later through the fourth sub-transmission link is redundant data, then the transmission data sent through the third sub-transmission link is received and saved and the transmission data sent through the fourth sub-transmission link is discarded; if the transmission time of the transmission data sent through the third sub-transmission link is not less than the transmission time of the transmission data sent through the fourth sub-transmission link, it indicates that the transmission data has been successfully transmitted through the fourth sub-transmission link, and the transmission data received later through the third sub-transmission link is redundant data, then the transmission data sent through the fourth sub-transmission link is received and saved and the transmission data sent through the third sub-transmission link is discarded.

[0225] It's worth noting that because the secure wired terminal simultaneously accesses the first and second grouped network planes for redundant data transmission, there's a time difference between receiving data over the two transmission links. If data has already been successfully transmitted over one transmission link, and the subsequent data received over the other transmission link is redundant, the first transmitted data is received and saved, and the later transmitted data is discarded.

[0226] It is worth noting that when the transmission scenario is a secure wired terminal transmitting data to a secure wireless terminal, the transmission process is similar to the scenario of a secure wireless terminal transmitting data to a secure wired terminal. Data transmission can be performed according to the adaptability of the system network structure, and will not be repeated here.

[0227] When the transmission scenario is a secure wireless terminal transmitting data to an unsecure wired terminal, that is, the source terminal is a secure wireless terminal and the target terminal is an unsecure wired terminal located under the same train, the transmission link includes the source wireless access node, the source marshaling network switch, and the target marshaling network switch. Figure 7 A flowchart of another data transmission method provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, the method includes:

[0228] Step 401: The source terminal sends transmission data to the source wireless access node corresponding to the compartment where it is located through wireless transmission technology.

[0229] In the embodiment of the present invention, the source terminal is a terminal that sends transmission data, and the source wireless access node is a wireless access node corresponding to the carriage where the source terminal is located.

[0230] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0231] Step 402: The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link.

[0232] In the embodiment of the present invention, the source marshalling network switch is the marshalling network switch corresponding to the carriage where the source terminal is located.

[0233] Step 403: The source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link.

[0234] In the embodiment of the present invention, the target marshalling network switch is the marshalling network switch corresponding to the carriage where the target terminal is located.

[0235] Step 404: The target marshaling network switch sends the transmission data to the target terminal via a wired link.

[0236] In the embodiment of the present invention, the target terminal is a terminal that receives transmission data.

[0237] It is worth noting that when the transmission scenario is a non-secure wired terminal transmitting data to a secure wireless terminal, the transmission process is similar to the above-mentioned scenario of a secure wireless terminal transmitting data to a non-secure wired terminal. Data transmission can be performed according to the adaptability of the system network structure, and will not be repeated here.

[0238] When the transmission scenario is a secure wireless terminal transmitting data to a non-secure wireless terminal, that is, the source terminal is a secure wireless terminal and the target terminal is a non-secure wireless terminal located on the same train, the transmission link includes the source wireless access node, the source marshaling network switch, the target wireless access node and the target marshaling network switch. The data transmission flow chart in this scenario can be found in Figure 4 The flowchart shown in the scenario of a non-secure wireless terminal transmitting data to a non-secure wireless terminal differs only in the step numbers. The data transmission process is the same and will not be repeated here. The method includes:

[0239] Step 501: The source terminal sends transmission data to the source wireless access node corresponding to the compartment where it is located through wireless transmission technology.

[0240] In the embodiment of the present invention, the source terminal is a terminal that sends transmission data, and the source wireless access node is a wireless access node corresponding to the carriage where the source terminal is located.

[0241] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0242] Step 502: The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link.

[0243] In the embodiment of the present invention, the source marshalling network switch is the marshalling network switch corresponding to the carriage where the source terminal is located.

[0244] Step 503: The source marshalling network switch sends the transmission data to the target marshalling network switch corresponding to the carriage where the target terminal is located through a wired link.

[0245] In the embodiment of the present invention, the target terminal is a terminal that receives transmitted data, and the target marshalling network switch is a marshalling network switch corresponding to the carriage where the target terminal is located.

[0246] Step 504: The target marshaling network switch sends the transmission data to the corresponding target wireless access node through a wired link.

[0247] In the embodiment of the present invention, the target wireless access node is a wireless access node of a marshalling network switch corresponding to the carriage where the target terminal is located.

[0248] Step 505: The target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0249] It is worth noting that the transmission scenarios of non-secure wireless terminals transmitting data to secure wireless terminals, secure wireless terminals transmitting data to non-secure wireless terminals, and non-secure wireless terminals transmitting data to non-secure wireless terminals are similar, and data transmission can be carried out according to the adaptability of the system network structure, which will not be repeated here.

[0250] When the transmission scenario is a non-secure wireless terminal transmitting data to a secure wired terminal, that is, the source terminal is a non-secure wireless terminal and the target terminal is a secure wired terminal located under the same train, the transmission link includes the source wireless access node, the source marshaling network switch, and the target marshaling network switch. The data transmission flow chart in this scenario can be found in Figure 7 The flowchart shown in the scenario of a secure wireless terminal transmitting data to an unsecure wired terminal differs only in the step numbers. The data transmission process is the same and will not be repeated here. The method includes:

[0251] Step 601: The source terminal sends transmission data to the source wireless access node corresponding to the compartment where it is located through wireless transmission technology.

[0252] In the embodiment of the present invention, the source terminal is a terminal that sends transmission data, and the source wireless access node is a wireless access node corresponding to the carriage where the source terminal is located.

[0253] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0254] Step 602: The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link.

[0255] In the embodiment of the present invention, the source marshalling network switch is the marshalling network switch corresponding to the carriage where the source terminal is located.

[0256] Step 603: The source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link.

[0257] In the embodiment of the present invention, the target marshalling network switch is the marshalling network switch corresponding to the carriage where the target terminal is located.

[0258] Step 604: The target marshaling network switch sends the transmission data to the target terminal via a wired link.

[0259] In the embodiment of the present invention, the target terminal is a terminal that receives transmission data.

[0260] It is worth noting that the transmission link for sending and receiving transmission data should comply with the functional adaptation requirements described in the network control system based on wireless transmission technology.

[0261] It is worth noting that the four transmission scenarios of secure wired terminals transmitting data to non-secure wireless terminals, non-secure wireless terminals transmitting data to secure wired terminals, non-secure wired terminals transmitting data to secure wireless terminals, and secure wireless terminals transmitting data to non-secure wired terminals are similar, and data transmission can be carried out according to the adaptability of the system network structure, so they will not be repeated here.

[0262] When the transmission scenario is a non-secure wireless terminal transmitting data to a non-secure wired terminal, that is, the source terminal is a non-secure wireless terminal and the target terminal is a non-secure wired terminal located on the same train, the transmission link includes the source wireless access node, the source marshaling network switch, and the target marshaling network switch. The data transmission flow chart in this scenario can be found in Figure 7 The flowchart shown in the scenario of a secure wireless terminal transmitting data to an unsecure wired terminal differs only in the step numbers. The data transmission process is the same and will not be repeated here. The method includes:

[0263] Step 701: The source terminal sends transmission data to the source wireless access node corresponding to the compartment where it is located through wireless transmission technology.

[0264] In the embodiment of the present invention, the source terminal is a terminal that sends transmission data, and the source wireless access node is a wireless access node corresponding to the carriage where the source terminal is located.

[0265] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0266] Step 702: The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link.

[0267] In the embodiment of the present invention, the source marshalling network switch is the marshalling network switch corresponding to the carriage where the source terminal is located.

[0268] Step 703: The source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link.

[0269] In the embodiment of the present invention, the target marshalling network switch is the marshalling network switch corresponding to the carriage where the target terminal is located.

[0270] Step 704: The target marshaling network switch sends the transmission data to the target terminal via a wired link.

[0271] In the embodiment of the present invention, the target terminal is a terminal that receives transmission data.

[0272] It is worth noting that the transmission scenarios of non-secure wired terminals transmitting data to non-secure wireless terminals, non-secure wireless terminals transmitting data to non-secure wired terminals, non-secure wired terminals transmitting data to secure wireless terminals, and secure wireless terminals transmitting data to non-secure wired terminals are similar. Data transmission can be carried out according to the adaptability of the system network structure, and will not be repeated here.

[0273] In the technical solution provided by the embodiment of the present invention, the source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data; the transmission link is the link between the source terminal and the target terminal through the backbone network and / or the marshalling network; the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal, which can realize data stream transmission between the wireless train backbone network and the wireless train marshalling network, and improve the redundancy and reliability in data transmission.

[0274] When the transmission scenario is data transmission between the terminal of the current train and the terminal of the adjacent train, that is, the source terminal is the terminal under the current train and the target terminal is the terminal under the adjacent train of the current train, the transmission link includes the current backbone network node and the target backbone network node. Figure 8 A flowchart of another data transmission method provided by an embodiment of the present invention is shown in FIG. Figure 8 As shown, the method includes:

[0275] Step 801: The source terminal sends the pre-acquired transmission data to the corresponding current backbone network node.

[0276] In the embodiment of the present invention, the source terminal is a terminal that needs to send transmission data, and the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal, and a non-secure wired terminal.

[0277] In the embodiment of the present invention, the current backbone network node is a backbone network node that needs to send transmission data to an adjacent train.

[0278] Step 802: The current backbone network node sends the transmission data to the target backbone network node corresponding to the adjacent train of the current train through wireless transmission technology.

[0279] In the embodiment of the present invention, the target backbone network node is a backbone network node corresponding to an adjacent train of the current train and needs to receive transmission data; the adjacent train of the current train is a train that needs to receive transmission data.

[0280] It is worth noting that wireless transmission technologies include but are not limited to LTE / LTE-V2X, 5G-NR / NR-V2X, WLAN series technologies (including 802.11p / 802.11BD), millimeter wave communication, Zigbee and Bluetooth Low Energy (BLE), and the embodiments of the present invention are not limited to this.

[0281] It is worth noting that the wireless transmission link during the process of sending and receiving transmission data should comply with the functional adaptation requirements described in the train network control system based on wireless transmission technology.

[0282] Step 803: The target backbone network node sends the transmission data to the target terminal.

[0283] In the embodiment of the present invention, the target terminal is a terminal that needs to receive transmission data, and the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal, and a non-secure wired terminal.

[0284] In the embodiment of the present invention, the transmission data in the data transmission process can be based on the actual situation according to Figures 4 to 7 Any of the methods shown is used to obtain it, which will not be repeated here.

[0285] In the technical solution provided by the embodiment of the present invention, the source terminal sends the pre-acquired transmission data to the corresponding current backbone network node; the current backbone network node sends the transmission data to the target backbone network node corresponding to the adjacent train of the current train through wireless transmission technology; the target backbone network node sends the transmission data to the target terminal, which can realize cross-train data flow transmission between the wireless train backbone network and the wireless train marshalling network, and improve the redundancy and reliability in data transmission.

[0286] It is worth noting that the acquisition, storage, use, and processing of data in the technical solutions of this application are in compliance with the relevant provisions of national laws and regulations. The user information in the embodiments of this application is obtained through legal and compliant channels, and the acquisition, storage, use, and processing of user information are authorized and agreed by the customer.

[0287] In the technical solution provided by the embodiment of the present invention, the train network control system adopts a wireless communication architecture to break the deep coupling relationship between traditional wiring harness design, production, deployment, installation, maintenance and vehicle structure, reduce the difficulty of on-site wiring, save cables, achieve car weight reduction, and improve the lightweight level of the car body; by applying wireless transmission technology to the train network control system composed of a two-layer communication architecture of the wireless train backbone network and the wireless train marshalling network plane, it provides technical support for the application of wireless communication in the train network, improves the reliability and stability of train network data transmission, and realizes high-bandwidth, low-latency network requirements.

[0288] Figure 9 A schematic diagram of the structure of a data transmission device provided in an embodiment of the present invention, wherein the device is used to execute the above-mentioned data transmission method, such as Figure 9 As shown, the device includes: a transceiver unit 11.

[0289] The transceiver unit 11, the source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data; the transmission link is the link between the source terminal and the target terminal through the backbone network and / or the marshalling network; the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal.

[0290] In an embodiment of the present invention, if the source terminal and the target terminal are both non-secure wireless terminals located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, a target wireless access node, and a target marshaling network switch;

[0291] The transceiver unit 11, the source terminal sends the transmission data to the source wireless access node corresponding to the carriage where it is located through wireless transmission technology; the source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; the source marshaling network switch sends the transmission data to the target marshaling network switch corresponding to the carriage where the target terminal is located through a wired link; the target marshaling network switch sends the transmission data to the corresponding target wireless access node through a wired link; the target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0292] In an embodiment of the present invention, if both the source terminal and the target terminal are secure wireless terminals, the transmission link includes a first sub-transmission link and a second sub-transmission link, the first sub-transmission link includes a first source wireless access node, a first source marshaling network switch, a first target wireless access node, and a first target marshaling network switch; the second sub-transmission link includes a second source wireless access node, a second source marshaling network switch, a second target wireless access node, and a second target marshaling network switch;

[0293] The transceiver unit 11, the source terminal sends the transmission data to the first source wireless access node and the second source wireless access node corresponding to the compartment respectively through wireless transmission technology.

[0294] The transceiver unit 11, the first source wireless access node sends the transmission data to the corresponding first source marshaling network switch through a wired link; the first source marshaling network switch sends the transmission data to the first target marshaling network switch through a wired link; the first target marshaling network switch sends the transmission data to the first target wireless access node through a wired link; the first target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0295] The transceiver unit 11, the second source wireless access node sends the transmission data to the corresponding second source marshaling network switch through a wired link; the second source marshaling network switch sends the transmission data to the second target marshaling network switch through a wired link; the second target marshaling network switch sends the transmission data to the second target wireless access node through a wired link; the second target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

[0296] The transceiver unit 11, the target terminal determines whether the transmission time of the transmission data sent through the first sub-transmission link is less than the transmission time of the transmission data sent through the second sub-transmission link; if so, receives the transmission data sent through the first sub-transmission link and discards the transmission data sent through the second sub-transmission link; if not, receives the transmission data sent through the second sub-transmission link and discards the transmission data sent through the first sub-transmission link.

[0297] In an embodiment of the present invention, if the source terminal is a secure wireless terminal and the target terminal is a secure wired terminal located under the same train, the transmission link includes a third sub-transmission link and a fourth sub-transmission link, the third sub-transmission link includes a third source wireless access node, a third source marshaling network switch, and a third target marshaling network switch; the fourth sub-transmission link includes a fourth source wireless access node, a fourth source marshaling network switch, and a fourth target marshaling network switch;

[0298] The transceiver unit 11, the source terminal sends the transmission data to the third source wireless access node and the fourth source wireless access node corresponding to the compartment through wireless transmission technology.

[0299] The transceiver unit 11, the third source wireless access node sends the transmission data to the corresponding third source marshaling network switch through a wired link; the third source marshaling network switch sends the transmission data to the third target marshaling network switch through a wired link; the third target marshaling network switch sends the transmission data to the target terminal through a wired link.

[0300] The transceiver unit 11, the fourth source wireless access node sends the transmission data to the corresponding fourth source marshaling network switch through a wired link; the fourth source marshaling network switch sends the transmission data to the fourth target marshaling network switch through a wired link; the fourth target marshaling network switch sends the transmission data to the target terminal through a wired link.

[0301] The transceiver unit 11, the target terminal determines whether the transmission time of the transmission data sent through the third sub-transmission link is less than the transmission time of the transmission data sent through the fourth sub-transmission link; if so, receives the transmission data sent through the third sub-transmission link and discards the transmission data sent through the fourth sub-transmission link; if not, receives the transmission data sent through the fourth sub-transmission link and discards the transmission data sent through the third sub-transmission link.

[0302] In an embodiment of the present invention, if the source terminal is a secure wireless terminal and the target terminal is a non-secure wired terminal located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, and a target marshaling network switch;

[0303] The transceiver unit 11, the source terminal sends the transmission data to the source wireless access node corresponding to the carriage through wireless transmission technology; the source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; the source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link; the target marshaling network switch sends the transmission data to the target terminal through a wired link.

[0304] In an embodiment of the present invention, if the source terminal is a terminal located under a current train and the target terminal is a terminal located under an adjacent train of the current train, the transmission link includes the current backbone network node and the target backbone network node;

[0305] The transceiver unit 11, the source terminal sends the pre-acquired transmission data to the corresponding current backbone network node; the current backbone network node sends the transmission data to the target backbone network node corresponding to the adjacent train of the current train through wireless transmission technology; the target backbone network node sends the transmission data to the target terminal.

[0306] In the embodiment of the present invention, the device further includes: a collection unit 12 and a data processing unit 13 .

[0307] The collecting unit 12 is a sensor device that collects sensor data.

[0308] The transceiver unit 11, the sensor device sends the sensor data to the data processing device through wireless transmission technology; the data processing device sends the processed sensor data to the target terminal.

[0309] The data processing unit 13 is a data processing device that processes the sensor data to obtain processed sensor data.

[0310] In the technical solution provided by the embodiment of the present invention, the source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data; the transmission link is the link between the source terminal and the target terminal through the backbone network and / or the marshalling network; the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal and a non-secure wired terminal, which can realize data stream transmission between the wireless train backbone network and the wireless train marshalling network, and improve the redundancy and reliability in data transmission.

[0311] The systems, devices, modules, or units described in the above embodiments may be implemented by computer chips or entities, or by products having certain functions. A typical implementation device is a computer device. Specifically, the computer device may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0312] An embodiment of the present invention provides a computer device including a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, the steps of the embodiment of the above-mentioned data transmission method are implemented. For a specific description, please refer to the embodiment of the above-mentioned data transmission method.

[0313] Reference below Figure 10 , which shows a structural diagram of a computer device 600 suitable for implementing an embodiment of the present application.

[0314] like Figure 10 As shown, the computer device 600 includes a central processing unit (CPU) 601, which can perform various appropriate tasks and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage portion 608 into a random access memory (RAM) 603. Various programs and data required for the operation of the computer device 600 are also stored in the RAM 603. The CPU 601, ROM 602, and RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0315] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, and the like; an output section 607 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 608 including devices such as a hard disk; and a communication section 609 including a network interface card such as a LAN card or a modem. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. Removable media 611, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 610 as needed, so that computer programs read therefrom can be installed in the storage section 608 as needed.

[0316] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program including program code for executing the methods illustrated in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication portion 609 and / or installed from removable media 611.

[0317] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0318] For the convenience of description, the above devices are described as being divided into various units according to their functions. Of course, when implementing this application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0319] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0320] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0321] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0322] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0323] The acquisition, storage, use, and processing of data in this application's technical solution comply with relevant national laws and regulations.

[0324] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0325] The present application may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communications network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0326] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0327] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A train network control system based on wireless transmission, characterized in that: The wireless transmission architecture of the system includes a wireless train backbone network, a wireless train marshaling network, and a train sensor network; the system includes: a first backbone network and a first marshaling network, the first backbone network is connected to the first marshaling network, and the first backbone network and the first marshaling network are both set on the current train; The first backbone network includes a first backbone network node and a second backbone network node; The first marshaling network includes a first marshaling network plane and a second marshaling network plane; The first backbone network node is connected to the first marshaling network plane, and the second backbone network node is connected to the second marshaling network plane; The network architecture of the train sensor network includes: multiple sensor devices and data processing devices; The sensing device is wirelessly connected to the data processing device; The data processing device is connected to the first marshaling network plane via a first wireless access node; or the data processing device is connected to the second marshaling network plane via a second wireless access node; The sensing device aggregates the collected data to a data processing device through wireless transmission technology, the data processing device processes the aggregated data to obtain processed sensing data, and transmits the processed sensing data to a first wireless access node corresponding to the compartment through wireless transmission technology; The system also includes a secure wireless terminal; The secure wireless terminal is provided with a first wireless interface and a second wireless interface; The secure wireless terminal is wirelessly connected to the first marshaling network plane through the first wireless interface, and is wirelessly connected to the second marshaling network plane through the second wireless interface. The first wireless interface and the second wireless interface are used for transmitting wireless data, and the transmission scenario is that a secure wireless terminal transmits data to a secure wireless terminal.

2. The train network control system based on wireless transmission according to claim 1, characterized in that: The current train includes at least one carriage; The first marshalling network plane includes at least one first wireless access node, and each carriage corresponds to a first wireless access node; The second marshalling network plane includes at least one second wireless access node, and each carriage corresponds to a second wireless access node.

3. The train network control system based on wireless transmission according to claim 2, characterized in that: The first marshaling network plane further includes at least one first marshaling network switch, and each carriage corresponds to a first marshaling network switch; The first backbone network node is connected to the first marshaling network switch by wire; The first wireless access node in each carriage is connected to the corresponding first marshalling network switch by wire; The second marshaling network plane further includes at least one second marshaling network switch, and each carriage corresponds to a second marshaling network switch; The second wireless access node in each carriage is connected to the corresponding second marshalling network switch by wire; The second backbone network node is connected to the second marshaling network switch by wire.

4. The train network control system based on wireless transmission according to claim 2, characterized in that: The system further includes: a non-secure wireless terminal; The non-secure wireless terminal is connected to the first marshaling network plane through a first wireless access node; or, the non-secure wireless terminal is connected to the second marshaling network plane through a second wireless access node.

5. The train network control system based on wireless transmission according to claim 1, characterized in that: The system further includes: a second backbone network and a second marshalling network, the second backbone network being connected to the second marshalling network, the second backbone network and the second marshalling network being both arranged on adjacent trains to the current train; The second backbone network includes a third backbone network node and a fourth backbone network node; The second marshaling network includes a third marshaling network plane and a fourth marshaling network plane; The third backbone network node is connected to the third marshalling network plane, and the fourth backbone network node is connected to the fourth marshalling network plane; The first backbone network node is wirelessly connected to the third backbone network node, and the second backbone network node is wirelessly connected to the fourth backbone network node, so that the current train and the adjacent train of the current train can perform wireless communication.

6. The train network control system based on wireless transmission according to claim 1, characterized in that: The system further comprises: a secure wired terminal; The secure wired terminal is connected to the first marshaling network plane and the second marshaling network plane respectively by wire.

7. The train network control system based on wireless transmission according to claim 3, characterized in that: The system further includes: a non-secure wired terminal; The non-secure wired terminal is connected to the first marshaling network switch by wire; or the non-secure wired terminal is connected to the second marshaling network switch by wire.

8. A data transmission method, the data transmission method being based on the train network control system based on wireless transmission according to any one of claims 1 to 7, characterized in that: The method comprises: The source terminal sends transmission data to the target terminal via a transmission link, so that the target terminal receives the transmission data; the transmission link is a link between the source terminal and the target terminal via a backbone network and / or a marshalling network; the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal, and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal, and a non-secure wired terminal; If both the source terminal and the target terminal are secure wireless terminals, the transmission link includes a first sub-transmission link and a second sub-transmission link, the first sub-transmission link including a first source wireless access node, a first source marshaling network switch, a first target wireless access node, and a first target marshaling network switch; the second sub-transmission link includes a second source wireless access node, a second source marshaling network switch, a second target wireless access node, and a second target marshaling network switch; The source terminal sends the transmission data to the target terminal through the transmission link so that the target terminal receives the transmission data, including: The source terminal sends the transmission data to the first source wireless access node and the second source wireless access node corresponding to the compartment respectively through wireless transmission technology; The first source wireless access node sends the transmission data to the corresponding first source marshaling network switch through a wired link; the first source marshaling network switch sends the transmission data to the first target marshaling network switch through a wired link; the first target marshaling network switch sends the transmission data to the first target wireless access node through a wired link; the first target wireless access node sends the transmission data to the target terminal through wireless transmission technology; The second source wireless access node sends the transmission data to the corresponding second source marshaling network switch through a wired link; the second source marshaling network switch sends the transmission data to the second target marshaling network switch through a wired link; the second target marshaling network switch sends the transmission data to the second target wireless access node through a wired link; the second target wireless access node sends the transmission data to the target terminal through wireless transmission technology; The target terminal determines whether the transmission time of the transmission data sent through the first sub-transmission link is less than the transmission time of the transmission data sent through the second sub-transmission link; if so, receives the transmission data sent through the first sub-transmission link and discards the transmission data sent through the second sub-transmission link; if not, receives the transmission data sent through the second sub-transmission link and discards the transmission data sent through the first sub-transmission link.

9. The data transmission method according to claim 8, characterized in that: If the source terminal and the target terminal are both non-secure wireless terminals located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, a target wireless access node, and a target marshaling network switch; The source terminal sends the transmission data to the target terminal through the transmission link, including: The source terminal sends the transmission data to the source wireless access node corresponding to the compartment where it is located through wireless transmission technology; The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; The source marshalling network switch sends the transmission data to the target marshalling network switch corresponding to the carriage where the target terminal is located through a wired link; The target marshaling network switch sends the transmission data to the corresponding target wireless access node through a wired link; The target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

10. The data transmission method according to claim 8, characterized in that: If the source terminal is a secure wireless terminal and the target terminal is a secure wired terminal located under the same train, the transmission link includes a third sub-transmission link and a fourth sub-transmission link, the third sub-transmission link including a third source wireless access node, a third source marshaling network switch, and a third target marshaling network switch; the fourth sub-transmission link including a fourth source wireless access node, a fourth source marshaling network switch, and a fourth target marshaling network switch; The source terminal sends the transmission data to the target terminal through the transmission link, including: The source terminal sends the transmission data to the third source wireless access node and the fourth source wireless access node corresponding to the compartment respectively through wireless transmission technology; The third source wireless access node sends the transmission data to the corresponding third source marshaling network switch via a wired link; the third source marshaling network switch sends the transmission data to the third target marshaling network switch via a wired link; the third target marshaling network switch sends the transmission data to the target terminal via a wired link; The fourth source wireless access node sends the transmission data to the corresponding fourth source marshaling network switch through a wired link; the fourth source marshaling network switch sends the transmission data to the fourth target marshaling network switch through a wired link; the fourth target marshaling network switch sends the transmission data to the target terminal through a wired link; The target terminal determines whether the transmission time of the transmission data sent through the third sub-transmission link is less than the transmission time of the transmission data sent through the fourth sub-transmission link; if so, receives the transmission data sent through the third sub-transmission link and discards the transmission data sent through the fourth sub-transmission link; if not, receives the transmission data sent through the fourth sub-transmission link and discards the transmission data sent through the third sub-transmission link.

11. The data transmission method according to claim 8, wherein: If the source terminal is a secure wireless terminal and the target terminal is a non-secure wired terminal located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, and a target marshaling network switch; The source terminal sends the transmission data to the target terminal through the transmission link, including: The source terminal sends the transmission data to the source wireless access node corresponding to the compartment where it is located through wireless transmission technology; The source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; The source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link; The target marshaling network switch sends the transmission data to the target terminal through a wired link.

12. The data transmission method according to claim 8, wherein: If the source terminal is a terminal located under the current train and the target terminal is a terminal located under an adjacent train of the current train, then the transmission link includes the current backbone network node and the target backbone network node; The source terminal sends the transmission data to the target terminal through the transmission link, including: The source terminal sends the pre-acquired transmission data to the corresponding current backbone network node; The current backbone network node sends the transmission data to the target backbone network node corresponding to the adjacent train of the current train through wireless transmission technology; The target backbone network node sends the transmission data to the target terminal.

13. The data transmission method according to claim 8, characterized in that: The method further comprises: The sensing device collects sensing data; The sensing device sends the sensing data to the data processing device through wireless transmission technology; The data processing device processes the sensor data to obtain processed sensor data; The data processing device sends the processed sensor data to the target terminal.

14. A data transmission device, characterized in that: The device comprises: A transceiver unit, wherein a source terminal sends transmission data to a target terminal via a transmission link, so that the target terminal receives the transmission data; the transmission link is a link between the source terminal and the target terminal via a backbone network and / or a marshalling network; the source terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal, and a non-secure wired terminal; the target terminal includes one of a secure wireless terminal, a secure wired terminal, a non-secure wireless terminal, and a non-secure wired terminal; If both the source terminal and the target terminal are secure wireless terminals, the transmission link includes a first sub-transmission link and a second sub-transmission link, the first sub-transmission link including a first source wireless access node, a first source marshaling network switch, a first target wireless access node, and a first target marshaling network switch; the second sub-transmission link includes a second source wireless access node, a second source marshaling network switch, a second target wireless access node, and a second target marshaling network switch; The transceiver unit and the source terminal respectively send the transmission data to the first source wireless access node and the second source wireless access node corresponding to the compartment where the source terminal is located through wireless transmission technology; The transceiver unit, the first source wireless access node sends the transmission data to the corresponding first source marshaling network switch through a wired link; the first source marshaling network switch sends the transmission data to the first target marshaling network switch through a wired link; the first target marshaling network switch sends the transmission data to the first target wireless access node through a wired link; the first target wireless access node sends the transmission data to the target terminal through wireless transmission technology; The transceiver unit, the second source wireless access node sends the transmission data to the corresponding second source marshaling network switch through a wired link; the second source marshaling network switch sends the transmission data to the second target marshaling network switch through a wired link; the second target marshaling network switch sends the transmission data to the second target wireless access node through a wired link; the second target wireless access node sends the transmission data to the target terminal through wireless transmission technology; The transceiver unit, the target terminal determines whether the transmission time of the transmission data sent through the first sub-transmission link is less than the transmission time of the transmission data sent through the second sub-transmission link; if so, receives the transmission data sent through the first sub-transmission link and discards the transmission data sent through the second sub-transmission link; if not, receives the transmission data sent through the second sub-transmission link and discards the transmission data sent through the first sub-transmission link.

15. The data transmission device according to claim 14, characterized in that: If the source terminal and the target terminal are both non-secure wireless terminals located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, a target wireless access node, and a target marshaling network switch; The transceiver unit, the source terminal sends the transmission data to the source wireless access node corresponding to the carriage where it is located through wireless transmission technology; the source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; the source marshaling network switch sends the transmission data to the target marshaling network switch corresponding to the carriage where the target terminal is located through a wired link; The target marshalling network switch sends the transmission data to the corresponding target wireless access node through a wired link; the target wireless access node sends the transmission data to the target terminal through wireless transmission technology.

16. The data transmission device according to claim 14, characterized in that If the source terminal is a secure wireless terminal and the target terminal is a secure wired terminal located under the same train, the transmission link includes a third sub-transmission link and a fourth sub-transmission link, the third sub-transmission link including a third source wireless access node, a third source marshaling network switch, and a third target marshaling network switch; the fourth sub-transmission link including a fourth source wireless access node, a fourth source marshaling network switch, and a fourth target marshaling network switch; The transceiver unit and the source terminal respectively send the transmission data to the third source wireless access node and the fourth source wireless access node corresponding to the carriage through wireless transmission technology; The transceiver unit and the third source wireless access node send the transmission data to the corresponding third source marshaling network switch through a wired link; The third source marshaling network switch sends the transmission data to the third target marshaling network switch through a wired link; The third target marshaling network switch sends the transmission data to the target terminal through a wired link; The transceiver unit, the fourth source wireless access node sends the transmission data to the corresponding fourth source marshaling network switch through a wired link; the fourth source marshaling network switch sends the transmission data to the fourth target marshaling network switch through a wired link; The fourth target marshaling network switch sends the transmission data to the target terminal through a wired link; The transceiver unit, the target terminal determines whether the transmission time of the transmission data sent through the third sub-transmission link is less than the transmission time of the transmission data sent through the fourth sub-transmission link; if so, receives the transmission data sent through the third sub-transmission link and discards the transmission data sent through the fourth sub-transmission link; if not, receives the transmission data sent through the fourth sub-transmission link and discards the transmission data sent through the third sub-transmission link.

17. The data transmission device according to claim 14, characterized in that: If the source terminal is a secure wireless terminal and the target terminal is a non-secure wired terminal located under the same train, the transmission link includes a source wireless access node, a source marshaling network switch, and a target marshaling network switch; The transceiver unit and the source terminal send the transmission data to the source wireless access node corresponding to the carriage through wireless transmission technology; the source wireless access node sends the transmission data to the corresponding source marshaling network switch through a wired link; The source marshaling network switch sends the transmission data to the target marshaling network switch through a wired link; The target marshaling network switch sends the transmission data to the target terminal through a wired link.

18. The data transmission device according to claim 14, characterized in that If the source terminal is a terminal located under the current train and the target terminal is a terminal located under an adjacent train of the current train, then the transmission link includes the current backbone network node and the target backbone network node; The transceiver unit, the source terminal sends the pre-acquired transmission data to the corresponding current backbone network node; the current backbone network node sends the transmission data to the target backbone network node corresponding to the adjacent train of the current train through wireless transmission technology; the target backbone network node sends the transmission data to the target terminal.

19. The data transmission device according to claim 14, characterized in that The device further comprises: a collection unit and a data processing unit; The acquisition unit, the sensor device collects sensor data; The transceiver unit and the sensor device send the sensor data to the data processing device through wireless transmission technology; the data processing device sends the processed sensor data to the target terminal; The data processing unit and the data processing device perform data processing on the sensing data to obtain processed sensing data.

20. A computer readable medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the data transmission method according to any one of claims 8 to 13 is implemented.

21. A computer device comprising a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, wherein: When the program instructions are loaded and executed by the processor, the data transmission method according to any one of claims 8 to 13 is implemented.

22. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the data transmission method according to any one of claims 8 to 13 is implemented.

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