KR20230057965A - Method And Apparatus for Managing TSN According to The Physical And Virtual Combination Environment of Train - Google Patents

Abstract

According to an embodiment of the present disclosure, in the TSN management method of a train network based on Time Sensitive Networking (TSN), a train network is configured by connecting the TSN of a first train car and the TSN of a second train car. process of doing; setting the TSN of the first train car among the TSN of the first train car and the TSN of the second train car as a main network of the train network; and resetting the TSN of the second train car to the main network of the train network when it is determined that an abnormality has occurred in the train network based on the network state signal.

Description

Apparatus and method for managing TSN according to physical and virtual combination environment of train {Method And Apparatus for Managing TSN According to The Physical And Virtual Combination Environment of Train}

The present disclosure relates to an apparatus and method for managing TSN according to physical coupling and virtual coupling environments of trains.

The contents described below merely provide background information related to the present embodiment and do not constitute prior art.

Time Sensitive Network (TSN) is a network technology for realizing deterministic data transmission of citizen data in a standard Ethernet network. TSN consists of Centralized User Configuration (CUC), Centralized Network Configuration (CNC), TSN bridge, Talker, and Listener.

The CUC interfaces with the Talker and Listener, which are the endpoints of the TSN, and receives information about time sensitive data streams from the Talker, creates a stream profile, and transmits it to the CNC. . The CNC interfaces with the CUC and the TSN bridge, and based on the citizenship data stream profile received from the CUC, the TSN bridges on the data transmission path derive the setting value of the TSN bridge so that the citizenship data stream can be smoothly forwarded. and transmits it to TSN bridges. The TSN bridge performs data transmission by processing or forwarding data streams in the data transmission path from the Talker to the Listener.

Since TSN can reliably transmit specific data at a desired time, it can be applied to inter-vehicle communication or a communication network in trains where the stable transmission of data is directly related to safety.

Conventional TSN assumes that the TSN bridge, CUC and CNC operate in a fixed network topology. However, the TSN applied to the onboard network of trains may have a flexible network topology depending on the form in which train cars are separated or combined for train organization. In this case, a plurality of CUCs and CNCs coexist in one network, which may cause various problems in terms of efficiency and stability of the network. Therefore, it is required to develop a technology capable of constructing and operating a stable and organic TSN in a flexible topology environment such as an on-board network of a train.

The TSN management apparatus and method according to an embodiment may configure a TSN-based train network by connecting the TSN of a first train car and the TSN of a second train car based on a main network.

An apparatus and method for managing a TSN according to an embodiment may detect an abnormality occurring in a train network based on a network state signal and reset the main network of the train network.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to an embodiment of the present disclosure, in a TSN management method of a train network based on a time sensitive network (TSN), the TSN of a first train car and the TSN of a second train car are connected to form a train network; setting the TSN of the first train car among the TSN of the first train car and the TSN of the second train car as a main network of the train network; and resetting the TSN of the second train car to the main network of the train network when it is determined that an abnormality has occurred in the train network based on the network status signal.

According to another embodiment of the present disclosure, a memory for storing one or more instructions; and a processor executing the one or more instructions stored in the memory, wherein the processor, by executing the one or more instructions, configures a train network by connecting the TSN of the first train car and the TSN of the second train car; , Among the TSN of the first train car and the TSN of the second train car, the TSN of the first train car is set as the main network of the train network, and it is determined that an error has occurred in the train network based on the network status signal. When configured, a TSN management device for resetting the TSN of the second train car to the main network of the train network is provided.

According to an embodiment, the TSN management apparatus and method configures a TSN-based train network in which the TSN of a first train car and the TSN of a second train car are connected on the basis of a main network, thereby improving the efficiency of the TSN-based train network. has the effect of

According to another embodiment, the TSN management apparatus and method has an effect of facilitating maintenance and management of the TSN-based train network by detecting an abnormality occurring in the train network based on the network status signal and resetting the main network of the train network. there is.

1 is a block diagram of a TSN management device according to an embodiment of the present disclosure.
2 is a block diagram of a TSN of a train car for explaining a process in which a TSN management apparatus configures a train network according to an embodiment of the present disclosure.
3 is a block diagram of a train network configured by a TSN management device according to an embodiment of the present disclosure.
4 is a flowchart illustrating a process of transmitting a data stream in a train network configured by a TSN management apparatus according to an embodiment of the present disclosure.
5 is a flowchart illustrating a process of resetting a main network of a train network by a TSN management device according to an embodiment of the present disclosure.
6 is a flowchart illustrating a TSN management method according to an embodiment of the present disclosure.

Hereinafter, some embodiments of the present disclosure are described in detail using exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present disclosure, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present disclosure, the detailed description will be omitted.

In describing the components of the embodiment according to the present disclosure, symbols such as first, second, i), ii), a), and b) may be used. These codes are only for distinguishing the component from other components, and the nature or sequence or order of the corresponding component is not limited by the codes. In the specification, when a part is said to 'include' or 'include' a certain component, it means that it may further include other components, not excluding other components unless explicitly stated otherwise. .

Each component of the apparatus or method according to the present invention may be implemented as hardware or software, or a combination of hardware and software. Also, the function of each component may be implemented as software, and the microprocessor may be implemented to execute the software function corresponding to each component.

1 is a block diagram of a TSN management apparatus according to an embodiment of the present disclosure.

Referring to FIG. 1 , a TSN management apparatus 100 according to an embodiment includes all or part of a communication unit 110, a processor 120, and a memory 130. Here, the communication unit 110, the processor 120, and the memory 130 can mutually transmit data through the bus 140.

All blocks shown in FIG. 1 are not essential components of the TSN management device 100, and some blocks included in the TSN management device 100 may be added, changed, or deleted in other embodiments.

The communication unit 110 may receive network information of TSN. For example, the communication unit 110 includes components such as identification information of TSN for each of a plurality of train cars constituting a train, connection information of train cars, talker constituting each TSN, CNC, CUC, TSN bridge and listener, etc. It is possible to receive identification information about elements, setting information of a wired or wireless network between train cars, information about a reception period of a network state signal, and the like.

The communication unit 110 may transmit TSN control information. For example, the communication unit 110 is communicatively connected to TSN components such as talker, CNC, CUC, TSN bridge and listener, and signals controlling each component in the process of data transmission in the train network. In addition, topology setting information of the train network, main network setting information, identification information of TSN components, and the like can be transmitted.

The processor 120 configures a train network by connecting the TSN of the first train car and the TSN of the second train car. Here, the first train car and the second train car may be two train cars at adjacent positions among a plurality of train cars constituting one train organization, but are not limited thereto, and are arbitrarily selected from among a plurality of train cars of the same train organization. It may be two train cars.

Various servers necessary for train operation may be mounted on the train car. For example, a train car may be equipped with an operation server that calculates control values related to train operation, a control server that transmits control signals to various in-vehicle devices, and a communication server that controls and communicates with other trains. there is.

And, there are various in-vehicle devices that operate based on the control signal received from the control server in the train car. For example, in-vehicle devices include a propulsion device or braking device for train acceleration or deceleration, a communication device for transmitting/receiving data with other trains or train cars, an auxiliary power device, a door opening/closing device, and an HVAC for air conditioning in a train car. (Heating, Ventilation, and Air Conditioning) may include at least one of the devices.

These devices receive control signals from the control server and periodically transmit feedback information such as control results to the control server. For example, the control server transmits a control signal to a propulsion device or braking device in a train vehicle to accelerate or decelerate the train, and the propulsion device or braking device performs control and then feeds back the control result to the control server. .

Signals or feedback information transmitted between servers and devices in train cars generally have the same data format and are transmitted at regular intervals. Therefore, TSN can be established in train cars, and data streams related to control signals or feedback can be transmitted timely and reliably using TSN.

The TSN of the train car includes CNC, CUC and TSN bridges. Specifically, various servers and devices in the above-described train car are composed of talkers or listeners, which are transmitting and receiving ends, according to data transmission or reception conditions in TSN, and various servers and devices in the train car are communicative with at least one TSN bridge. connected to In addition, a CNC and a CUC may be provided for each train car in order to set and control a data transmission process in the TSN of the train car.

A train for a formation includes a series of plural train cars connected back and forth. Therefore, each train car is equipped with a wired communication device and a wireless communication device for communicatively connecting with adjacent train cars, and these communication devices are connected to the TSN bridge of the train car. When two adjacent train cars are connected, the two adjacent train cars may configure a train network that performs communication between train cars by physically connecting each wired communication device, but is not limited thereto, and the wireless communication device of the two train cars Using, it is possible to configure a wireless train network that performs communication between train cars.

The processor 120 configures an entire train network by connecting TSN bridges connected to communication devices of each train car among TSN bridges constituting the TSN of the first train car and the TSN of the second train car. Here, the train network includes a first local TSN performing internal data stream transmission of the first train car, a second local TSN performing internal data stream transmission of the second train car, and between the first train car and the second train car. It may include an inter-vehicle TSN that performs data stream transmission. That is, the TSN of each train car can be divided into a part corresponding to the local TSN of the train network and a part corresponding to the TSN between vehicles of the train network.

In one train where the first train car and the second train car are connected, a control signal related to the driving of the train is calculated by the control server of the first train car, which is the lead car, and transmitted to the second train car, which is the next car. Here, the control signal is transmitted through TSN between vehicles of the train network.

When the control signal is transmitted to the control server of the second train car, the control server of the second train car reflects the weight of the second train car, the operating characteristics of the propulsion device or the operating characteristics of the braking device, and the like, to drive the second train car. Generates control signals to be transmitted to related in-vehicle devices. The control signal generated by the control server of the second train car is transmitted to an in-vehicle device of the second train car using the second local TSN.

In the process of data transmission in the above-described train network, since a plurality of networks for each train car form one train network, problems due to redundant components may occur in the train network. For example, a problem in which the first CNC of the TSN of the first train car and the second CNC of the TSN of the second train car overlap may occur.

The processor 120 sets the TSN of the first train car among the TSN of the first train car and the TSN of the second train car as the main network of the train network. Here, the processor 120 sets and controls the first CNC for the TSN of the first train car set as the main network and at least one of the first local TSN, the second local TSN, and the inter-vehicle TSN of the train network. Can be set by CNC.

According to an embodiment, the processor 120 sets the first CNC for the TSN of the first train vehicle determined as the main network to the CNCs of the first local TSN, the second local TSN, and the inter-vehicle TSN of the train network, and The second CNC for the train car's TSN can be set to inactive.

The processor 120 sets and controls the first CNC to integrally manage all TSN bridges constituting the entire train network. Accordingly, the first CNC transmits TSN setting information such as data stream information and data transmission scheduling information to each of the TSN bridges included in all train cars constituting the train.

Here, in the case of the CUC, since information on the data stream is transmitted and received with the talker and listener for data transmission within the entire train network, the processor 120 determines the TSN of the train car to which the first CUC and the second CUC respectively correspond. The first CUC and the second CUC can be configured and controlled to be communicatively connected to the end of the CUC to collect information about the data stream and transmit the corresponding information to the first CNC set as the main CNC for the entire train network.

If the first CNC sets and controls all the TCNs constituting the train network, there is an advantage in preventing inefficiency or collision errors in the system due to overlapping operations of the CNCs. However, as the number of train cars increases, the number of talkers and listeners, which are ends of the TCN of the train network, increases. Therefore, the amount of computation to be performed by one CNC to manage all data streams can greatly increase, and when the TSN bridge setting and control message transmitted by the CNC reaches the listener of the target train car through several hops, it is not expected. Problems such as unexpected transmission delay may occur.

Therefore, according to another embodiment of the present disclosure, the processor 120 sets the first CNC for the TSN of the first train vehicle determined as the main network to the CNC of the first local TSN and inter-car TSN of the train network, and The second CNC for the TSN of the train car may be set as the CNC of the second local TSN.

Here, the first CNC sets up and controls TSN bridges related to transmission of data streams within the first train car and data streams between train cars, and the second CNC controls the transmission of data streams within the second train car. TSN bridges related to transmission can be configured and controlled. That is, since the CNC for each TSN of each train car manages data stream transmission inside each train car, and the first CNC of the first train car TSN set as the main network manages the transmission of data streams between trains, It is possible to reduce the burden of 1 CNC operation, and since the TSN bridge setting and control message is not transmitted to the final listener, the above-mentioned transmission delay can be prevented.

According to another embodiment of the present disclosure, when the data transmission path between the TSN of the first train car and the TSN of the second train car is configured as a wireless communication path, the processor 120 converts the inter-vehicle data stream transmission path into one virtual It can be regarded as a TSN bridge and constitute a train network.

However, when data communication between train cars is performed wirelessly, it is inefficient to configure the corresponding wireless path as a part of the entire TSN because the delay characteristics of the wireless path may appear indeterminate depending on the channel state and the channel access scheme. can be Accordingly, when data communication between train cars is performed wirelessly, for example, in a virtual train formation, the processor 120 may set both the CNC and CUC of each train car to an active state.

The processor 120 controls the TSN of train cars constituting the train network to transmit and receive network status signals. Here, the network status signal may be a signal transmitted from the TSN of the first train car set as the main network to each of the TSNs of other train cars at predetermined intervals. For example, the TSN of the first train car may transmit a network status signal to the TSN of the second train car at set intervals.

The processor 120 may reset the TSN of the second train car to the main network of the train network when it is determined that an error has occurred in the train network based on the network state signal.

For example, the processor 120 calculates a second period, which is a reception period of a network status signal transmitted in a preset first period from the TSN of the first train car to the TSN of the second train car. When an error occurs in the train network, particularly the TSN of the first train car, which is the main network, the network state signal is delayed and received or not received by the TSN of the second train car. In this case, the second period may be calculated as an arbitrary value relatively large compared to the preset first period or may be calculated as an infinite value.

The processor 120 compares the value of the second period with a threshold set in advance as a reception period within a normal range based on the first period. If the value of the second period exceeds the threshold, the processor 120 determines that an abnormality has occurred in the train network.

When it is determined that an error has occurred in the train network, the processor 120 may reset the main network of the train network from the TSN of the first train car to the TSN of the second train car. Here, the processor 120 may replace the first CNC with the second CNC for setting and controlling the first local TSN, the second local TSN, and the inter-vehicle TSN included in the train car network.

Here, the processor 120 resets the main network to the TSN of the second train car adjacent to the first train car instead of the TSN of the first train car, but is not limited thereto, and the second train adjacent to the first train car is not limited thereto. Instead of a vehicle, it can be reset to any subsequent train car.

When the main network of the entire train network is reset to the TSN of the second train car, the processor 120 configures a new train network based on the set value for the new train network with the TSN of the second train car as the main network; Update setting data.

The memory 130 may include volatile memory, permanent, virtual, or other types of memory for storing information used by or output by the TSN management device 100 . For example, the memory 130 may include random access memory (RAM) or dynamic RAM (DRAM).

The memory 130 stores basic programs, application programs, and network setting information for the operation of the TSN management device 100. Also, the memory 130 may provide the stored information to the processor 120 according to a request of the processor 120.

The memory 130 may store various data for processing or control of the processor 120 . For example, the memory 130 includes TSN identification information for each train car, first local TSN, second local TSN, and inter-vehicle TSN setting information, main network setting information, and setting information related to transmission and reception of network status signals. can be stored.

2 is a block diagram of a TSN of a train car for explaining a process in which a TSN management apparatus configures a train network according to an embodiment of the present disclosure.

Referring to FIG. 2 , the TSN configured on the train car 200 includes a centralized network configuration (CNC) 210, a centralized user configuration (CUC) 220, a first TSN bridge 230, and a second TSN bridge 240. ) and vehicle-to-vehicle communication equipment (270, 281, 283). The TSN management apparatus according to an embodiment of the present disclosure sets and controls a TSN configured on a train car 200, and furthermore, when configuring a train by connecting a plurality of train cars, a plurality of train cars An entire train network may be configured based on the corresponding CNC 210, CUC 220, first TSN bridge 230, and second TSN bridge 240, respectively.

In the train car 200, there are various in-vehicle devices 260 related to the operation of the train or the function of the train car. The in-vehicle device 260 operates according to the control signal transmitted from the control server 250 .

The control server 250 generates control signals for operating and controlling the in-vehicle device 260 of the train car 200 . Here, the control signal generated by the control server 250 is not only a signal for controlling the in-vehicle device 260 of the corresponding train car 200, but also a signal for controlling the in-vehicle device of another train car 200. It may include a control signal transmitted to other train cars using the inter-vehicle communication equipment (270, 281, 283) of the vehicle.

The vehicle-to-vehicle communication equipment includes a backbone (281, 283) capable of connecting the TSN of the train vehicle 200 and the TSN of the adjacent train vehicle by wire when physically connected to the adjacent train vehicle of the train vehicle 200 using a coupler or the like. ). In addition, the vehicle-to-vehicle communication equipment may include a wireless communication equipment 270 through which the train vehicle 200 wirelessly communicates with adjacent train vehicles or other trains of the virtual train.

The control server 250, the in-vehicle device 260, and the inter-vehicle communication equipment 270, 281, and 283 constitute an end of the network in the TSN of the train car 200. Here, according to the transmitted data stream, one of the control server 250, the in-vehicle device 260, and the vehicle-to-vehicle communication equipment 270, 281, and 283 may be a talker, and the other one may be a listener.

For example, when a data stream for a control signal for controlling the in-vehicle device 260 is transmitted from the control server 250, the control server 250, as a talker, transmits the control signal to the in-vehicle device 260 as a listener. send to Conversely, when the feedback signal regarding the control result of the in-vehicle device 260 is transmitted to the control server 250, the in-vehicle device 260 transmits the feedback signal to the control server 250 as a listener as a talker. .

In order to transmit the internal data stream of the train car, the control server 250 and the in-vehicle device 260 are interconnected through at least one second TSN bridge 240 .

As another example, when a signal for controlling a device in another train car from the control server 250 is transmitted to the TSN of another train car using inter-vehicle communication equipment 270, 281, 283, the control server 250 ), as a talker, can transmit control signals to other train cars as listeners. Conversely, control signals generated in other train cars may be transmitted to the control server 250 as a listener through the inter-vehicle communication equipment 270 , 281 , and 283 of the train car 200 .

Accordingly, the control server 250 and the vehicle-to-vehicle communication equipment 270, 281, and 283 may be configured as talkers or listeners of the network according to the path of the data stream transmitted between vehicles. To perform such data stream transmission between train cars, the control server 250 and the inter-vehicle communication equipment 270, 281, and 283 may be interconnected through at least one first TSN bridge 230.

The CUC 220 may receive information about a transmission data stream from the control server 250, the in-vehicle device 260, and the vehicle-to-vehicle communication equipment 270, 281, and 283, and transmit the information to the CNC 210. Based on the information about the data stream received from the CUC 220, the CNC 210 determines whether the 1st TSN bridge 230 or the 2nd TSN bridge 240, which exists on the transmission path of the corresponding data stream, normally transmits the data stream. Configures and controls the TSN bridge to forward.

3 is a block diagram of a train network configured by a TSN management device according to an embodiment of the present disclosure.

Referring to FIG. 3 , the TSN management device configures a train network by connecting the TSN of the first train car 310 and the TSN of the second train car 320 .

The TSN of the first train car 310 is the first CNC 311 that sets and controls the TSN bridges for smooth transmission of the data stream and the first CUC that collects information about the data stream and delivers it to the first CNC 311. (312).

The TSN management device constitutes a first local TSN 350 for transmitting internal data streams such as control signals and feedback signals generated by the control server 315 of the first train car 310 and the in-vehicle device 316. can do. Here, the first local TSN 350 includes a data stream transmission path including the second TSN bridge 314, the control server 315, and the in-vehicle device 316, and a CUC and a CNC for controlling it. Here, the CUC for the first local TSN 350 may be set to the first CUC 312 .

The TSN of the second train car 320 is a second CNC 321 that sets and controls TSN bridges for smooth transmission of data streams and a second CUC that collects information about data streams and delivers them to the second CNC 321. (322).

The TSN management device constitutes a second local TSN 360 for transmitting internal data streams such as control signals and feedback signals generated by the control server 325 of the second train car 320 and the in-vehicle device 326. can do. Here, the second local TSN 360 includes a data stream transmission path including the second TSN bridge 324, the control server 325, and the in-vehicle device 326, and a CUC and a CNC for controlling it. Here, the CUC for the second local TSN 360 may be set to the second CUC 322 .

The TSN management device includes a first TSN bridge 313 for the TSN of the first train car 310 to transmit a data stream between the TSN of the first train car 310 and the TSN of the second train car 320, and The inter-vehicle TSN 340 may be configured by communicatively interconnecting the first TSN bridge 323 for the TSN of the second train car 320 . Here, the first train car 310 and the second train car 320 establish a communication connection between train cars using at least one of a physical connection 331 such as an Ethernet backbone and a virtual connection 332 using wireless communication equipment. The inter-vehicle TSN 340 can transmit a data stream from one train car to another using a physical connection 331 or a virtual connection 332.

In the train network configured by the TSN management device, a plurality of TSNs of train cars are combined to form one network for the entire train. Therefore, in order for data streams to be timely and reliably transmitted across the entire train network, the train network must be integrated and controlled.

According to an embodiment, the TSN management device determines the TSN of the first train car 310 as the main network of the train network, and sets the first CNC 311 to manage all data stream transmission paths in the train network. Here, the TSN management device sets the first CNC 311 as the CNC for the first local TSN 350, the second local TSN 350, and the inter-vehicle TSN 340, and the second CNC 321 is passive. It can be set to wait in the (passive) state. In this case, the first CNC 311 transmits setting information about transmission of each data stream to all TSN bridges existing in the train network and controls the transmission process.

According to another embodiment, the TSN management device determines the TSN of the first train car 310 as the main network of the train network, and the first CNC 311 manages the data stream transmission path between all train cars in the train network. , The data stream transmission path inside the train car can be set to be managed by the CNC corresponding to each TSN of the train car.

Specifically, the TSN management device sets the first CNC 311 as the CNC for the first local TSN 350 and the inter-vehicle TSN 340, and sets the second CNC 321 to the second local TSN 360. It can be set by CNC for By setting the internal data stream for each train car to be distributed and managed for each train car TSN, the processing load of the first CNC 311 for the TSN of the first train car 310 determined as the main network can be distributed.

4 is a flowchart illustrating a process of transmitting a data stream in a train network configured by a TSN management apparatus according to an embodiment of the present disclosure.

Referring to FIG. 4, when a data stream is created, the Talker initializes the settings of the data stream (S400). For example, the talker may be an in-car device in a first train car configured as the main network, and the data stream is used to control the operation of a device in a second train car for the operation of the train. It may be the control result data of the device. This data stream is transmitted from the talker in the first train car to the listener in the second car via the first local TSN, the inter-car TSN, and the second local TSN sequentially.

The Talker transmits a transmission request message for the data stream to the first CUC (S410). The first CUC obtains information on data to be transmitted based on the Talker's transmission request message and sets a data stream (S420).

The first CUC transfers information about the data stream setting to the second CNC for the TSN of the second train car as a listener (S421). In addition, the first CUC transmits data stream setting information to the first CNC (S422).

As described above, since the data stream transmitted from the talker must sequentially pass through the transmission path set on the TSN of the first train car and the transmission path set on the TSN of the second train car, information on the setting of the data stream is At the same time as being transmitted to the 1st CNC to set up TSN bridges on the transmission route in the 1st train car, it should be provided to the 2nd CUC as data stream information to set up the TSN bridges on the transmission route in the 2nd train car.

The 1st CNC transmits TSN bridge setting information for the TSN of the 1st train car existing on the transmission path of the data stream, and sets transmission schedules for the TSN bridges to smoothly transmit the data stream (S430) .

Meanwhile, the second CUC receiving data stream information from the first CUC sets a data stream based on the TSN information of the second train car (S440) and transmits the data stream information to the second CNC (S442).

Like the first CNC, the second CNC transmits TSN bridge setting information for the TSN of the second train car existing on the data stream transmission route, and transmits schedules for the TSN bridges to smoothly transmit the data stream. is set (S450). Here, the TSN bridge setting information for the TSN of the second train car may be information generated at the first CNC and transmitted to the TSN of the second train car via the inter-vehicle TSN. In this case, the second CNC is the TSN bridge Setting information for may not be created separately.

Through the above process, if a TSN data transmission path is established from the talker located in the first train car to the listener located in the second train car, the data stream can be transmitted over three sections. First, the first local TSN of the train network transmits a data stream from the talker to the inter-vehicle TSN (S460). The inter-vehicle TSN transmits the data stream from the first train car to the second train car (S470). Here, the data stream may be transmitted using a wired/wireless communication connection provided between the TSN bridge of the first train car and the TSN bridge of the second train car.

The first local TSN of the train network transmits the data stream reaching the network of the second train car to the listener (S480).

5 is a flowchart illustrating a process of resetting a main network of a train network by a TSN management device according to an embodiment of the present disclosure.

Referring to FIG. 5 , when the TSNs of n train cars constitute one train network, the first CNC, the second CNC to the nth CNC exchange network status signals with each other (S500).

The first CNC is the CNC of the first train car TSN set as the main network, and can operate as the main CNC for the entire train network. When an error occurs in the first CNC operating as the main CNC, a problem may occur in managing the entire train network. In addition, when a specific CNC operating in the train network as well as the main CNC malfunctions, a serious failure may occur in data stream transmission.

Accordingly, the CNCs of the train network can transmit and receive network status signals indicating that they are in a normal operating state with the CNCs of other train cars at preset intervals. For example, the network status signal may be a heartbeat message and a response message of a predetermined cycle exchanged between n CNCs constituting the train network.

When an error occurs in the first CNC, the first CNC may not be able to transmit the network status signal or may incorrectly transmit the network status signal at a non-determined time point. Accordingly, the cycle of the network status signal received from the CNC other than the first CNC, for example, the nth CNC, may be received at a cycle different from a preset cycle.

The TSN management device obtains a reception period at which the network status signal transmitted by the first CNC is received at the n-th CNC, and detects an abnormality of the first CNC based on the acquired reception period (S510).

The TSN management device may determine that an error has occurred in the first CNC when the reception period of the network status signal obtained from the nth CNC has a value different from a preset transmission period. For example, if the reception period of the network status signal exceeds a threshold range for a preset normal transmission period, it may be determined that an error has occurred in the first CNC, but is not limited thereto. If it is not received within the normal number of times, it may be determined that an error has occurred in the first CNC.

If it is determined that an error has occurred in the first CNC, the TSN management device resets a new main network to replace the existing main network, the first train car TSN (S520). For example, the TSN management device resets the TSN of any one of a plurality of subsequent train cars in the same train to the main network instead of the first train car, which is the most preceding train car in the train, to the CNC of the corresponding TSN. Control can be transferred. Here, any one train car may be determined as a second train car adjacent to the first train car, but is not limited thereto.

The TSN management device determines the second CNC as the main CNC of the train network (S530). In order for the second CNC selected as the new representative CNC to replace the function of the first CNC, it must be able to transfer the network management information of the first CNC. Therefore, according to an embodiment according to the present disclosure, CNCs of train networks may be configured to database their own network management information and periodically exchange information included in the database. For example, CNCs in a train network can exchange network management information when exchanging network status signals.

In addition, in addition to periodic exchange of database information, when network management information is updated, such as when a TSN bridge is added to the network, the updated network management information can be transmitted to other CNCs.

The second CNC determined as the main CNC transmits a train network topology setting update message indicating that the main CNC has been changed to the first CUC and TSN bridges interfacing with the first CNC (S540).

The first CUC updates settings of the first CUC based on the changed train network topology (S550).

6 is a flowchart for explaining a TSN management method according to an embodiment of the present disclosure.

Referring to FIG. 6, the TSN management device configures a train network by connecting the TSN of the first train car and the TSN of the second train car (S610). Here, the first train car and the second train car may be two train cars at adjacent positions among a plurality of train cars constituting one train organization, but are not limited thereto, and are arbitrarily selected from among a plurality of train cars of the same train organization. It may be two train cars.

Various servers necessary for train operation may be mounted on the train car. For example, a train car may be equipped with an operation server that calculates control values related to train operation, a control server that transmits control signals to various in-vehicle devices, and a communication server that controls and communicates with other trains. there is.

In addition, various in-vehicle devices that operate based on the control signal received from the control server may exist in the train car.

These devices may receive control signals from the control server and periodically transmit feedback information such as control results to the control server.

Signals or feedback information transmitted between servers and devices in train cars generally have the same data format and are transmitted at regular intervals. Therefore, TSN can be established in train cars, and data streams related to control signals or feedback can be transmitted timely and reliably using TSN.

The TSN of train cars includes CNC, CUC and TSN bridges. Specifically, various servers and devices in the above-described train car are composed of talkers or listeners, which are transmitting and receiving ends, according to data transmission or reception conditions in TSN, and various servers and devices in the train car are communicative with at least one TSN bridge. connected to In addition, a CNC and a CUC may be provided for each train car in order to set and control a data transmission process in the TSN of the train car.

The TSN management device configures the entire train network by connecting TSN bridges connected to the communication device of each train car among the TSN bridges constituting the TSN of the first train car and the TSN of the second train car. Here, the train network includes a first local TSN performing internal data stream transmission of the first train car, a second local TSN performing internal data stream transmission of the second train car, and between the first train car and the second train car. It may include an inter-vehicle TSN that performs data stream transmission. That is, the TSN of each train car can be divided into a part corresponding to the local TSN of the train network and a part corresponding to the TSN between vehicles of the train network.

The TSN management device sets the TSN of the first train car as the main network of the train network (S620).

The TSN management device sets the TSN of the first train car among the TSN of the first train car and the TSN of the second train car as the main network of the train network. Here, the TSN management device sets and controls the first CNC for the TSN of the first train car set as the main network and at least one of the first local TSN, the second local TSN, and the inter-vehicle TSN of the train network. can be set to

According to an embodiment, the TSN management device sets the first CNC for the TSN of the first train car determined as the main network to the CNCs of the first local TSN, the second local TSN, and the inter-car TSN of the train network, and sets the second train The second CNC for the vehicle's TSN can be set to inactive.

The TSN management device sets and controls the first CNC to comprehensively manage all TSN bridges constituting the entire train network. Accordingly, the first CNC transmits TSN setting information such as data stream information and data transmission scheduling information to each of the TSN bridges included in all train cars constituting the train.

Here, in the case of the CUC, since information on data streams is transmitted and received with talkers and listeners for data transmission within the entire train network, the TSN management device determines the TSN of the train cars to which the first CUC and the second CUC respectively correspond. The first CUC and the second CUC can be configured and controlled to be communicatively connected to the terminal, collect information about the data stream, and transmit the corresponding information to the first CNC set as the main CNC for the entire train network.

According to another embodiment of the present disclosure, the TSN management device sets the first CNC for the TSN of the first train car determined as the main network to the CNC of the first local TSN and inter-car TSN of the train network, and sets the CNC of the second train car The second CNC for the TSN can be set to the CNC of the second local TSN.

Here, the first CNC sets up and controls TSN bridges related to transmission of data streams within the first train car and data streams between train cars, and the second CNC controls the transmission of data streams within the second train car. TSN bridges related to transmission can be configured and controlled.

When the data transmission path between the TSN of the first train car and the TSN of the second train car is configured as a wireless communication path, the TSN management device may configure the train network by considering the inter-car data stream transmission path as a virtual TSN bridge.

The TSN management device determines whether an abnormality has occurred in the train network based on the network status signal (S630).

The TSN management device controls the TSN of train cars constituting the train network to transmit and receive network status signals. Here, the network status signal may be a signal transmitted from the TSN of the first train car set as the main network to each of the TSNs of other train cars at predetermined intervals. For example, the TSN of the first train car may transmit a network status signal to the TSN of the second train car at set intervals.

For example, the TSN management device calculates a second period, which is a reception period of a network status signal transmitted in a preset first period from the TSN of the first train car to the TSN of the second train car. If an error occurs in the train network, particularly the TSN of the first train car, which is the main network, the network state signal is delayed and received or not received by the TSN of the second train car, so that the second period is equal to the preset first period. It can be calculated as an arbitrary value that is relatively large by comparison, or as a value that is infinite.

The TSN management device compares the value of the second period with a threshold value preset as a reception period within a normal range based on the first period. If the value of the second cycle exceeds the threshold, the TSN management device determines that an abnormality has occurred in the train network.

The TSN management device resets the TSN of the second train car to the main network of the train network (S640). If it is determined that an error has occurred in the train network, the TSN management device may reset the main network of the train network from the TSN of the first train car to the TSN of the second train car. Here, the processor 120 may replace the first CNC with the second CNC for setting and controlling the first local TSN, the second local TSN, and the inter-vehicle TSN included in the train vehicle network.

Here, the TSN management device may reset the main network to the TSN of the second train car adjacent to the first train car instead of the TSN of the first train car, but is not limited thereto, and the second train adjacent to the first train car Instead of a vehicle, it can be reset to any subsequent train car.

When the main network of the entire train network is reset to the TSN of the second train car, the TSN management device configures the new train network based on the set values for the new train network with the TSN of the second train car as the main network, and sets update the data

Various implementations of the systems and techniques described herein may include digital electronic circuits, integrated circuits, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), computer hardware, firmware, software, and/or their can be realized in combination. These various implementations may include being implemented as one or more computer programs executable on a programmable system. A programmable system includes at least one programmable processor (which may be a special purpose processor) coupled to receive data and instructions from and transmit data and instructions to a storage system, at least one input device, and at least one output device. or may be a general-purpose processor). Computer programs (also known as programs, software, software applications or code) contain instructions for a programmable processor and are stored on a "computer readable medium".

A computer-readable recording medium includes all types of recording devices in which data that can be read by a computer system is stored. These computer-readable recording media include non-volatile or non-transitory media such as ROM, CD-ROM, magnetic tape, floppy disk, memory card, hard disk, magneto-optical disk, and storage device. It may be a medium, and may further include a transitory medium such as a data transmission medium. Also, computer-readable recording media may be distributed in computer systems connected through a network, and computer-readable codes may be stored and executed in a distributed manner.

In the flow chart/timing diagram of the present specification, it is described that each process is sequentially executed, but this is merely an example of the technical idea of one embodiment of the present disclosure. In other words, those skilled in the art to which an embodiment of the present disclosure belongs may change and execute the order described in the flowchart/timing diagram within the range that does not deviate from the essential characteristics of the embodiment of the present disclosure, or one of each process Since the above process can be applied by performing various modifications and variations in parallel, the flow chart/timing chart is not limited to a time-series sequence.

The above description is merely an example of the technical idea of the present embodiment, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of the present embodiment, but to explain, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of this embodiment should be construed according to the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of rights of this embodiment.

100: TAS management device
110: communication department
120: processor
130: memory

Claims (10)

In the TSN management method of a time sensitive network (TSN) based train network,
constructing a train network by connecting the TSN of the first train car and the TSN of the second train car;
setting the TSN of the first train car among the TSN of the first train car and the TSN of the second train car as a main network of the train network; and
Resetting the TSN of the second train car to the main network of the train network when it is determined that an abnormality has occurred in the train network based on the network status signal.
TSN management method. According to claim 1,
The train network,
a first local TSN performing internal data stream transmission of the first train car;
a second local TSN performing internal data stream transmission of the second train car; and
A TSN management method comprising an inter-vehicle TSN performing data stream transmission between the first train car and the second train car. According to claim 2,
The process of setting the TSN of the first train car among the TSN of the first train car and the TSN of the second train car as the main network of the train network,
setting a first CNC for the TSN of the first train car to the CNCs of the first local TSN, the second local TSN, and the inter-vehicle TSN of the train network; and
and setting a second CNC for the TSN of the second train car to be inactive. According to claim 2,
The process of setting the TSN of the first train car among the TSN of the first train car and the TSN of the second train car as the main network of the train network,
setting a first CNC for the TSN of the first train car as a CNC for the first local TSN and the inter-car TSN; and
and setting a second CNC for the TSN of the second train car to the CNC of the second local TSN. According to claim 1,
The process of determining that an abnormality has occurred in the train network based on the network state signal,
obtaining a reception period at which the network state signal transmitted at regular intervals from the TSN of the first train car is received by the TSN of the second train car; and
and determining whether the reception period exceeds a preset normal reception period threshold. a memory that stores one or more instructions; and
a processor to execute the one or more instructions stored in the memory;
The processor, by executing the one or more instructions,
A train network is formed by connecting the TSN of the first train car and the TSN of the second train car;
Among the TSN of the first train car and the TSN of the second train car, the TSN of the first train car is set as the main network of the train network;
resetting the TSN of the second train car to the main network of the train network when it is determined that an abnormality has occurred in the train network based on the network status signal
TSN management device. According to claim 6,
The train network,
a first local TSN performing internal data stream transmission of the first train car;
a second local TSN performing internal data stream transmission of the second train car; and
TSN management apparatus comprising an inter-vehicle TSN that transmits a data stream between the first train car and the second train car. According to claim 7,
the processor,
setting a first CNC for the TSN of the first train car to the CNCs of the first local TSN, the second local TSN, and the inter-vehicle TSN of the train network;
The TAS management device for setting the second CNC for the TSN of the second train car to be inactive. According to claim 7,
the processor,
A first CNC for the TSN of the first train car is set to the CNC of the first local TSN and the inter-car TSN;
TSN management device for setting the second CNC for the TSN of the second train car to the CNC of the second local TSN. According to claim 9,
the processor,
Determine that an abnormality has occurred in the train network based on the network status signal;
obtaining a reception period at which the network status signal transmitted at regular intervals from the TSN of the first train car is received by the TSN of the second train car;
The TSN management device for determining whether the reception period exceeds a preset normal reception period threshold.

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