EP4299413A1 - Procédé, dispositif de planification et système de communication pour une transmission de données entre des véhicules guidés sur rails et un dispositif côté terrain - Google Patents

Procédé, dispositif de planification et système de communication pour une transmission de données entre des véhicules guidés sur rails et un dispositif côté terrain Download PDF

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Publication number
EP4299413A1
EP4299413A1 EP23182184.4A EP23182184A EP4299413A1 EP 4299413 A1 EP4299413 A1 EP 4299413A1 EP 23182184 A EP23182184 A EP 23182184A EP 4299413 A1 EP4299413 A1 EP 4299413A1
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EP
European Patent Office
Prior art keywords
track
data
wireless local
bound
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23182184.4A
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German (de)
English (en)
Inventor
Jérôme Parron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Mobility GmbH
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Siemens Mobility GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Mobility GmbH filed Critical Siemens Mobility GmbH
Publication of EP4299413A1 publication Critical patent/EP4299413A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/50—Trackside diagnosis or maintenance, e.g. software upgrades
    • B61L27/57—Trackside diagnosis or maintenance, e.g. software upgrades for vehicles or trains, e.g. trackside supervision of train conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or train for signalling purposes
    • B61L15/0018—Communication with or on the vehicle or train
    • B61L15/0027—Radio-based, e.g. using GSM-R
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/70—Details of trackside communication

Definitions

  • the invention relates to a method, a planning device and a communication system for controlling a transmission of data between a plurality of track-bound vehicles and a land-based device via a wireless local communication network.
  • WLAN Wireless Local Area Network
  • EP 2 029 412 B1 describes a method for transmitting data, in particular between a rail vehicle and an operations control center.
  • the object of the invention is to improve the transmission of data between the majority of track-bound vehicles and the land-based device via the wireless local communication network.
  • the data transmission is planned using a land-based planning device.
  • a requirement for data transmission between at least one track-bound vehicle of the plurality of track-bound vehicles and the land-based device is taken into account.
  • the data capacity of the wireless local communications network is taken into account when planning. Furthermore, one will
  • Residence information which represents the period of residence of at least one track-bound vehicle of the plurality of track-bound vehicles within the range of the wireless local communication network, is taken into account.
  • the data is transmitted via the wireless local communication network during a stay of the at least one track-bound vehicle of the plurality of track-bound vehicles within the range of the wireless local communication network depending on the planning.
  • the method is preferably a computer-implemented method.
  • the invention is based on the knowledge that track-bound vehicles generally stay within the range of the wireless local communications network for a limited period of time.
  • One reason for this is that high utilization of track-bound vehicles is desired and therefore a stay (particularly a stop or parking) within the range of the wireless local communication network is of limited duration.
  • This data contains, for example, contents of a local hard drive of the track-bound vehicle and/or contents of a video database that contains image information generated by a video surveillance system of the track-bound vehicle.
  • the data includes, for example, software updates for subsystems of the track-bound vehicle and/or media content, such as films, for passenger entertainment systems of the track-bound vehicle.
  • the invention recognized that even with a large bandwidth provided by the wireless local communication network, bottlenecks can arise in the transmission of data due to the number of vehicles, the amount of data to be transmitted and / or the limited length of stay of the vehicles.
  • This can For example, track-bound vehicles may have to leave the wireless local communications network without completing the required data transfer. As a result, this can lead to disruptions in the operation of track-bound vehicles.
  • the length of time vehicles stay within the range of the wireless local communications network must be increased. This can affect the desired high utilization of track-bound vehicles (since the vehicles have to stay within the range of the communication network for a long time).
  • a particular challenge is the number of track-bound vehicles that have to simultaneously transmit data via the wireless local network.
  • the resulting conflicts lead to additional waiting time and repeated attempts to transfer the data.
  • the invention recognized that simply increasing the number of access points of the wireless local communications network does not represent a satisfactory solution.
  • One reason for this is the resulting overlap of radio transmission frequencies and the associated interference (both within a channel and between different channels).
  • the solution according to the invention solves these problems through the land-based planning device, which plans the transmission of the data. Requirements for data transmission, the data technology capacity (transmission capacity) of the wireless local communication network and the location information are taken into account.
  • the person skilled in the art preferably understands the term “demand” to mean that the demand is based, for example, on a request or request from a communication participant who would like to obtain certain data or make certain data available to other communication participants.
  • Capacity to mean the ability of the wireless local communications network to transmit data.
  • the stay period is represented, for example, by the arrival time, which represents a time at which the track-bound vehicle comes into the range of the wireless local communications network, and by the expected departure time, which represents a time at which the track-bound vehicle is expected to reach the range of the wireless local communications network leaves, represents, investigates.
  • a significant advantage of the invention is that by using the planning device on land, preferably centrally, different requests for data transmission can be managed and planned. Different criteria can be taken into account in order to efficiently utilize the given capacities. In particular, the specified bandwidths can be used to the maximum by reducing or preventing conflicts between different data transmission plans from multiple vehicles.
  • the data transmission between the track-bound vehicle and the land-based device is preferably carried out by means of a communication device which has a transmitting unit and a receiving unit.
  • the transmitting unit When data is transmitted from the track-bound vehicle to the land-based device, the transmitting unit is arranged on the track-bound vehicle and the receiving unit is arranged on the land side.
  • the transmitting unit In the case of a reverse data transmission starting from the land-based device to the track-bound vehicle, the transmitting unit is arranged on the land-side and the receiving unit on the track-bound vehicle.
  • the transmitting unit and receiving unit of the track-bound vehicle or the land-based facility are each formed by a single transmitting-receiving unit.
  • the transmitter/receiver unit of the Track-bound vehicle can be controlled by a communication device of the vehicle, in particular a mobile communication gateway (MCG).
  • MCG mobile communication gateway
  • the transceiver unit of the land-based device can be controlled by a communication device of the land-based device, in particular a ground communication gateway.
  • the track-bound vehicle is preferably a rail vehicle, for example a multiple unit.
  • the land-based facility preferably includes an operations control center.
  • the operations control center further preferably manages several services, such as a camera monitoring system, a passenger information system and/or a maintenance system. These services are supported by the corresponding facilities of the respective track-bound vehicle.
  • each track-bound vehicle has a camera monitoring system that generates video data that represents optically captured areas within the track-bound vehicle.
  • each track-bound vehicle has, for example, a passenger information system, for example a passenger entertainment system, which makes music and films available to passengers.
  • each track-bound vehicle has, for example, a maintenance system which provides relevant information for the maintenance of the track-bound vehicle.
  • the wireless local communication network is arranged within a depot facility which is intended for the stay of the plurality of track-bound vehicles.
  • the location information includes the arrival time of the track-bound vehicle within the depot facility and the departure time of the track-bound vehicle from the depot facility.
  • the depot facility is, for example, a building and/or area for parking track-bound vehicles (often simply called a depot).
  • the track-bound vehicle comes within range of the wireless local communications network and connects to one of the access points of the wireless local communications network (association).
  • the wireless local communications network is preferably designed in such a way that a vehicle that is located within the depot is at the same time within the range of the wireless local communications network.
  • the wireless local communications network has a range across the entire depot or at least a range across a portion of the depot intended for data transmission.
  • the departure time is preferably an expected departure time of the track-bound vehicle from the depot facility.
  • the planning device can include a computing device as part of the depot device and/or a computing device close to the depot device.
  • the landside facility can be designed as part of the depot facility or close to the depot facility.
  • the planning device is part of a land-based device arranged remotely from the depot device.
  • This land-based facility preferably includes an operations control center.
  • the planning device serves to plan the data transmission within the depot device.
  • the planning device can be designed to plan the data transmission for several depot devices that are present at different locations.
  • the request for data transmission is based on a vehicle-side request which originates from the at least one track-bound vehicle of the plurality of track-bound vehicles and/or on the basis of a request which comes from a service and/or an application originating from the shore-based facility.
  • a data connection is established between the track-bound vehicle and the land-based device when the vehicle comes within range of the wireless local communications network. Further preferably, it is then checked which application or service requests data to be downloaded from the land-based device to the vehicle. Further preferred is also checked which information stored on the vehicle should be uploaded to the land-based facility.
  • a data connection is established between the track-bound vehicle and a wireless access point of the wireless local communications network (association) when the vehicle comes within the range of the wireless local communications network.
  • a communication connection is then established between the track-bound vehicle and the land-based device. For example, this communication connection takes place via the World Wide Web (Internet).
  • the basis for establishing the communication connection between the track-bound vehicle and the land-based device is, for example, the establishment of a data connection between the track-bound vehicle and a wireless access point of the wireless local communications network.
  • the establishment of the communication connection with the land-based device can be triggered by one of the wireless access points recognizing that a track-bound vehicle has arrived.
  • the arrival of the track-bound vehicle can be determined via sensors at the depot facility.
  • the request is triggered by the respective track-bound vehicle when it comes into the range of the wireless local communication network.
  • Data stored on the track-bound vehicle and intended for transmission to the land-based facility are determined.
  • data provided by the land-based device, which is intended for transmission to a track-bound vehicle of the plurality of track-bound vehicles is determined.
  • the at least one track-bound vehicle of the plurality of track-bound vehicles sends vehicle identification information, which represents an identification of the track-bound vehicle, to the planning device.
  • the at least one track-bound vehicle sends depot identification information and/or depot location information, which represents an identification of a depot device that contains the wireless local communications network, to the planning device.
  • the at least one track-bound vehicle sends a data transmission list which contains the data to be transmitted as list entries, the type of service to which the data to be transmitted relate, the type of data to be transmitted, and the priority of the data to be transmitted for each list entry and/or contains the amount of data to be transmitted to the planning device.
  • the at least one track-bound vehicle sends departure time information, which represents an expected point in time at which the track-bound vehicle leaves the range of the wireless local communication network, to the planning device.
  • the information mentioned can be sent to the planning device based on components of the land-based device.
  • the planning device determines the data capacity of the wireless local communications network by querying a database.
  • depot identification information is used, which represents an identification of the depot facility containing the wireless local communications network.
  • the planning device determines the data capacity of the wireless local communications network based on capacity information that represents a capacity of the wireless local communications network, which is determined by means of at least one track-bound vehicle of the plurality of track-bound vehicles by data-technical scanning of the wireless local communications network.
  • the planning device requests data technology that the track-bound vehicles scan the wireless local communication network for data technology and report back the result.
  • the vehicle can autonomously report the result of the scanning back to the planning device (without prior request by the planning device) if the scanning is carried out regularly when the vehicle tries to detect and connect to the access point, for example when entering into the depot facility.
  • the information mentioned can be obtained by decoding a WLAN beacon that is emitted by the WLAN access point.
  • an expected load on a radio environment within the wireless local communications network is also taken into account during planning.
  • the type of data to be transmitted and/or a priority of the data to be transmitted is also taken into account during planning.
  • This information is assigned, for example, as metadata to a file that contains the data.
  • this file contains diagnostic data, which therefore has a high level of criticality.
  • this file contains data with the help of which billing data is generated in land-based systems, which therefore has a high level of criticality.
  • this file contains occupancy information that has a low criticality.
  • this file contains data for a convenience function that has a low criticality.
  • the priority of the data to be transmitted can result, for example, from the type of data to be transmitted.
  • the planning device preferably plans for each track-bound vehicle when the data transmission should be carried out and with which one The vehicle should connect to the WLAN access point in order to carry out this data transfer.
  • the planning device can ensure that a single track-bound vehicle transmits data via a specific WLAN access point at a given time.
  • the vehicle can use the entire bandwidth of the WLAN access point. This maximizes radio bandwidth efficiency by eliminating the need for contention resolution or latency due to managing competing transmission requests.
  • the planning device can ensure that a data transmission with high priority is scheduled first in the planning. For example, data transmission for a track-bound vehicle that leaves the depot facility early is scheduled first. Another example is preferring the transmission of a software update or a timetable update over the transmission of a passenger entertainment system update.
  • This data transfer is preferably initiated on this basis and the data is transferred.
  • the planning device can preferably carry out load balancing. Accordingly, loads are distributed between all available WLAN access points, taking into account the respective transmission capacity of the respective WLAN access point (supported data rate) and the signal quality (WLAN RSSI) measured by the vehicles. The planning device can then instruct the respective track-bound vehicle to connect to another WLAN access point that offers better transmission capacity.
  • the data transmission is preferably reinitiated after load distribution and the data is transmitted, for example via the other WLAN access point.
  • WLAN access point is used for control signaling. Accordingly, all track-bound vehicles connect to this WLAN access point when they enter the depot facility in order to establish an initial connection with the land-based facility and communication with the planning facility via this WLAN access point.
  • Other WLAN access points can be reserved for data transfers with large volumes and high speeds. Accordingly, there is no control signaling via the other WLAN access points in order to maximize radio bandwidth efficiency and reduce the overall transmission time for each vehicle.
  • a data storage may be provided within or close to the depot facility in order to reduce the access time to content that is to be transmitted to or from the vehicle. For example, if a video collection for the passenger entertainment system is to be downloaded to all vehicles, a local copy of the video collection within this data store (within or close to the depot facility) would reduce latency and increase throughput when updating the vehicles.
  • the invention further relates to a computer program comprising instructions which, when the program is executed by a computing device, cause it to carry out the method described above.
  • the invention further relates to a computer program product with a computer program of this type.
  • the computing device is preferably at least partially a computing device of the planning device.
  • the invention further relates to a provision device for the computer program of the type described above, wherein the provision device stores and/or provides the computer program.
  • the provision device is, for example, a storage unit that Computer program stores and/or provides.
  • the provision device is, for example, a network service, a computer system, a server system, in particular a distributed, for example cloud-based computer system and/or virtual computer system, which stores and/or provides the computer program product, preferably in the form of a data stream.
  • the provision takes place in the form of a program data block as a file, in particular as a download file, or as a data stream, in particular as a download data stream, of the computer program.
  • This provision can also be made, for example, as a partial download consisting of several parts.
  • Such a computer program is read into a system using the provision device, for example, so that the method according to the invention is carried out on a computer.
  • the planning device is set up to plan the data transmission.
  • the planning device comprises a computing device which is set up to take into account a requirement for data transmission between at least one track-bound vehicle of the plurality of track-bound vehicles and the land-based device when planning.
  • the computing device is also set up to take the data capacity of the wireless local communications network into account when planning.
  • the computing device is also set up to take into account location information, which represents the period of stay of one of the plurality of track-bound vehicles within the range of the wireless local communication network, when planning.
  • the communication system comprises a plurality of track-bound vehicles, a planning device of the type described above and a wireless local communication network.
  • the wireless communication network is for the transmission of data during the stay of the at least one vehicle within the range of the wireless local communication network is set up depending on the planning.
  • Figure 1 shows schematically the structure of an exemplary embodiment of a communication system 1 according to the invention, which includes several track-bound vehicles 3 and 5, a wireless local communication network 7 and a land-based device 13.
  • the track-bound vehicles 3 and 5 are rail vehicles 4 and 6. In the in Figure 1 In the exemplary embodiment shown, two track-bound vehicles 3 and 5 are shown. However, the invention can be used analogously for a constellation with more than two vehicles.
  • the track-bound vehicles 3 and 5 each have a mobile communication gateway 41 (MCG: Mobile Communication Gateway) and a transceiver unit 43 as a wireless communication interface.
  • MCG Mobile Communication Gateway
  • the transceiver unit 43 is controlled, for example, by the mobile communication gateway 41.
  • the wireless local communications network 7 has several WLAN access points 8, 10, 12.
  • three WLAN access points are shown.
  • the invention can be used analogously for a constellation with more than three WLAN access points.
  • Figure 2 shows the sequence of the method according to the invention in a schematic flow diagram.
  • Figure 3 shows schematically the data technology interaction of the elements of the communication system 1 according to the invention when carrying out the method according to the invention.
  • the planning device 20 has a computing device 21 which is set up to execute a computer program.
  • the computer program is executed by the computing device 21, it is caused to carry out at least parts of the method according to the invention.
  • a method step A1 the track-bound vehicle 3 enters a depot area, which is formed by a depot device 37, at an arrival time TAN1.
  • the depot facility 37 is, for example, a building and/or area (depot) for parking the vehicles 3 and 5.
  • the track-bound vehicle 3 comes within the range of the wireless local communication network 7 and connects to the WLAN access point in a method step B1 8 (this connection is often technically called an association).
  • the track-bound vehicle 5 enters the depot area at an arrival time TAN2.
  • the track-bound vehicle 5 comes into the range of the wireless local communication network 7 and connects to the WLAN access point 10 in a method step B2.
  • a communication connection is established between the track-bound vehicle 3 and the land-based device 13. For example, this communication connection takes place via the World Wide Web 39 (Internet). Based on this communication connection, it is determined in a method step D1 which application or service requires data to be downloaded from the land-based device 13 to the vehicle 3. In particular, this determination is triggered by a request from the service or application originating from the land-based facility 13. In a method step E1, it is further determined which information stored on the track-bound vehicle 3 should be uploaded to the land-based device 13. In particular, this is done by a vehicle-side Demand emanating from the track-bound vehicle is triggered.
  • the method steps C1, D1 and E1 are carried out analogously for the track-bound vehicle 5 as method steps C2, D2 and E2.
  • this or similar information can be provided to the planning device 20 by means of components of the land-based device 13 when this requests or triggers the transmission of data to or from the track-bound vehicle 3 or 5.
  • the planning device 20 obtains knowledge of the capacity of the wireless local communications network 7, for example via a database query using the depot identification information.
  • the planning device 20 determines the capacity of the wireless local communications network 7 based on capacity information that represents a capacity of the wireless local communications network 7. This capacity information is determined in a method step H using the track-bound vehicles 3 and 5 by data scanning of the wireless local communication network 7: For this purpose, the planning device 20 requests data in a method step G that the track-bound vehicles 3 and 5 scan the wireless local communication network 7 in a method step H and report the result back in a method step J.
  • the vehicle can send the result of the scanning autonomously to the planning device 20 (ie without prior notification Request by the planning device 20), for example if the scanning is carried out regularly when the vehicle tries to detect the WLAN access point 8 and connect to it, for example when entering the depot device 37.
  • the planning device 20 plans in a method step M for each track-bound vehicle 3, 5 when the data transmission should be carried out and with which WLAN access point 8, 10, 12 the track-bound vehicle 3 or 5 should connect in order to do this To carry out data transfer.
  • the planning device 20 can ensure that a single track-bound vehicle 3 or 5 transmits data via a specific WLAN access point 8, 10 or 12 at a given time.
  • the track-bound vehicle 3 or 5 can use the entire bandwidth of the WLAN access point 8, 10 or 12. This maximizes radio bandwidth efficiency by eliminating the need for contention resolution or latency due to managing competing transmission requests.
  • the planning device 20 can ensure that a data transmission with high priority is carried out first planning is scheduled. For example, the data transmission for a track-bound vehicle that leaves the depot facility 37 early is scheduled first. Another example is preferring the transmission of a software update or a timetable update over the transmission of a passenger entertainment system update.
  • This data transfer is initiated in a method step N and the data is transmitted in a method step O.
  • the planning device 20 can carry out load balancing in a method step P. Accordingly, loads are distributed between all available WLAN access points 8, 10 and 12, taking into account the respective transmission capacity of the respective WLAN access point (supported data rate) and the signal quality (WLAN RSSI), which are measured by vehicles 3 and 5. The planning device 20 can then instruct the respective track-bound vehicle to connect to another WLAN access point that offers better transmission capacity.
  • loads are distributed between all available WLAN access points 8, 10 and 12, taking into account the respective transmission capacity of the respective WLAN access point (supported data rate) and the signal quality (WLAN RSSI), which are measured by vehicles 3 and 5.
  • the planning device 20 can then instruct the respective track-bound vehicle to connect to another WLAN access point that offers better transmission capacity.
  • the data transmission is re-initiated in a method step Q after the load distribution P.
  • a method step R a connection is established with the other WLAN access point (association) and the data is transmitted in a method step S, for example via the other WLAN access point.
  • WLAN access point is used for control signaling. Accordingly, all track-bound vehicles connect to this WLAN access point when they have entered the depot facility 37 in order to carry out an initial connection with the land-based device 13 and communication with the planning device 20 via this WLAN access point.
  • Other WLAN access points can be reserved for data transfers with large volumes and high speeds. Accordingly, there is no control signaling via the other WLAN access points in order to maximize the radio bandwidth efficiency and reduce the overall transmission time for the vehicles.
  • a data storage may be provided within or close to the depot device 37 to reduce the access time to content to be transferred to or from the vehicle. For example, if a video collection for the passenger entertainment system is to be downloaded to all vehicles, a local copy of the video collection within that data store (within or near the depot facility 37) would reduce latency and increase throughput when updating the vehicles.
  • the planning device 20 is part of the land-based device 13, which includes an operations control center 22.
  • the planning device 20 can be part of a computing device installed within the depot device 37.
  • the domain name or the IP address of the planning device 20 can be provided on the track-bound vehicle 3 or 5 or can be communicated to the track-bound vehicle from the land-based device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Mobile Radio Communication Systems (AREA)
EP23182184.4A 2022-06-30 2023-06-28 Procédé, dispositif de planification et système de communication pour une transmission de données entre des véhicules guidés sur rails et un dispositif côté terrain Pending EP4299413A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022206653.7A DE102022206653A1 (de) 2022-06-30 2022-06-30 Verfahren, Planungseinrichtung und Kommunikationssystem für eine Datenübertragung zwischen spurgebundenen Fahrzeugen und einer landseitigen Einrichtung

Publications (1)

Publication Number Publication Date
EP4299413A1 true EP4299413A1 (fr) 2024-01-03

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EP23182184.4A Pending EP4299413A1 (fr) 2022-06-30 2023-06-28 Procédé, dispositif de planification et système de communication pour une transmission de données entre des véhicules guidés sur rails et un dispositif côté terrain

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EP (1) EP4299413A1 (fr)
DE (1) DE102022206653A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2029412B1 (fr) 2006-06-22 2009-09-30 Siemens Aktiengesellschaft Procédé pour la transmission de données
US20110134878A1 (en) * 2009-12-04 2011-06-09 Geiger John Andrew Media Access Control Scheme for a Multi-Frequency TDMA Network
US20180334179A1 (en) * 2015-02-12 2018-11-22 Mitsubishi Electric Corporation Train control system, base-station control device, ground wireless base station, and on-vehicle wireless station
EP3964419A1 (fr) * 2020-09-02 2022-03-09 Siemens Mobility GmbH Transmission des données entre un véhicule guidé sur rails et un dispositif terrestre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2029412B1 (fr) 2006-06-22 2009-09-30 Siemens Aktiengesellschaft Procédé pour la transmission de données
US20110134878A1 (en) * 2009-12-04 2011-06-09 Geiger John Andrew Media Access Control Scheme for a Multi-Frequency TDMA Network
US20180334179A1 (en) * 2015-02-12 2018-11-22 Mitsubishi Electric Corporation Train control system, base-station control device, ground wireless base station, and on-vehicle wireless station
EP3964419A1 (fr) * 2020-09-02 2022-03-09 Siemens Mobility GmbH Transmission des données entre un véhicule guidé sur rails et un dispositif terrestre

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