Abstract: Systems and methods for monitoring an operation of a door of a public transportation vehicle are disclosed. In an embodiment, the system includes an optical sensor unit and a control unit. The optical sensor is arranged at a distance from the door and configured to record a movement of the door during an opening and/or a closing. The control unit is configured to (1) determine a position of a reference point of the door based on the recorded movement of the door, (2) determine a parameter of the movement of the door during the movement based on the determined position of the reference point, (3) determine a deviation of the parameter of the movement from a predetermined/allowed range of values of the parameter, and (4) determine an error in the operation of the door based on the determined deviation.

Abstract: A wireless communication system for a ground based vehicle, such as a train, is disclosed. In an embodiment, the system includes a router connected to a plurality of antennas. The router is configured to transmit and receive a wireless data communication to and from a stationary communication server outside the ground based vehicle through at least one base station of an exterior mobile network via the plurality of antennas. The plurality of antennas are directional antennas arranged on planes of the vehicle functioning as ground planes, isolating planes, or absorbing planes. Each plane extends in a height direction or a length direction of the ground based vehicle. At least one antenna's beam covers a laterally directed sector to a first side of the vehicle, and at least one antenna's beam covers a laterally directed sector to a second side of the vehicle.

Abstract: Electric railway systems are disclosed. In an embodiment, the electric railway system includes a continuous conductor, access points, connections, and a microwave link. The continuous conductor runs along the railway track for supplying high-voltage power to trains travelling on the railway system, and supplies high-voltage power to trains travelling on the electric railway systems. The continuous conductor is arranged as an overhead line suspended from poles or towers distributed along the railway track. The access points provide data communication with trains travelling on the railway system, and are arranged on the poles or towers above the railway track. The connections connect the electric railway system to an electric low-voltage power cable. The microwave link connects the access points.

Abstract: Wireless communication systems for a vehicle, such as a train, are disclosed. In an embodiment, the wireless communication system includes a communication unit, an antenna, a power cable, a data transferring path, and a protective shield. The communication unit is arranged inside the vehicle. The antenna is provided on or above an exterior metal surface, such as the roof, of the vehicle. The power cable and the data transferring path connect the antenna and the communication unit. The protective shield is made of a conductive material, and is electrically and mechanically bonded to the exterior metal surface of the vehicle. The protective shield includes a cavity for accommodating the antenna, and at least one waveguide aperture extends through the protective shield and into the cavity.

Abstract: A method and system for wireless communication between a moving vehicle, such as a train, and a remote server through at least one external mobile network are disclosed. The communication system includes at least one router in the train for receiving and transmitting wireless data communication to and from a stationary communication server outside the train through at least one exterior mobile network via at least one antenna. The router includes a control unit configured to allocate bandwidth according to a predefined packet policy to streams of data packets which are matched to the predefined packet policies, providing for a very efficient bandwidth management in a wireless network within a train. Hereby, is easy to prioritize voice-over-IP (VOIP) and/or VPN traffic over video traffic.

Abstract: A system and method for providing wireless data communication between a wireless communication system in an aircraft and a stationary communication server outside the aircraft are disclosed. The wireless communication system includes a plurality of antennas, and a router in the aircraft configured to transmit and receive wireless data communication to and from a stationary communication server outside the aircraft through at least one ground base station via at least one of the plurality of antennas. The plurality of antennas includes at least one omnidirectional antenna and at least one directional antenna. The router includes a control unit configured to restrict the wireless data communication to solely occur through the at least one directional antenna the when the current altitude of the aircraft is determined to be above a predefined altitude threshold value.

Abstract: Systems and methods for monitoring an operation of a door of a public transportation vehicle are disclosed. In an embodiment, the system includes an optical sensor unit and a control unit. The optical sensor is arranged at a distance from the door and configured to record a movement of the door during an opening and/or a closing. The control unit is configured to (1) determine a position of a reference point of the door based on the recorded movement of the door, (2) determine a parameter of the movement of the door during the movement based on the determined position of the reference point, (3) determine a deviation of the parameter of the movement from a predetermined/allowed range of values of the parameter, and (4) determine an error in the operation of the door based on the determined deviation.

Abstract: A system and method for providing wireless data communication between a wireless communication system in an aircraft and a stationary communication server outside the aircraft are disclosed. The wireless communication system includes a router network connected to a plurality of antennas, wherein the router network is configured to transmit and receive wireless data communication to and from a stationary communication server outside said aircraft through at least one ground base station via said antennas. The router network includes a plurality of connectivity nodes being physically separated and distributed within the aircraft, the connectivity nodes being connected to each other via a bus, and each connectivity node including a control unit, at least one modem, and preferably a plurality of modems, and a connection to at least one of the antennas. Further, each antenna is connected only to one of the connectivity nodes.

Abstract: A method and system for wireless communication between a public transport vehicle and a remote server through at least one external mobile network. At least one router is provided in the public transport vehicle for receiving and transmitting wireless data to and from a stationary communication server outside the public transport vehicle and to and from at least one client onboard the public transport vehicle, wherein router includes a captive portal in order to provide an authentication process for the client(s). The router determines if a stream of wireless data packets received by said router corresponds to at least one of a VoIP stream and a VoWIFI stream. The router then forwards, if it has been determined that the stream of wireless data packets corresponds to at least one of a VoIP stream and a VoWIFI stream.

Abstract: A wireless communication system and method for a moving vehicle having a plurality of carriages is disclosed. The system includes a plurality of routers, each router being arranged in a separate carriage and each router being configured to receive and transmit wireless data communication to and from a stationary communication server outside said moving vehicle through at least one exterior mobile network via at least one antenna, wherein said at least one exterior mobile network provides at least one data link; receive and transmit data packets to and from at least one client onboard the moving vehicle; and communicate with every other router in said moving vehicle in order to receive and transmit data packets to and from said every other router, thereby forming an onboard router network.

Abstract: A method and device for wireless communication between a mobile router in a moving vehicle, such as a train, and an external wireless network is disclosed. The external network includes a plurality of base stations distributed along a vehicle path of travel in compliance with a WLAN standard. The method includes: setting a current value for a timeout parameter within the WLAN standard to a default maximum value exceeding a maximum propagation time between neighboring base stations along the vehicle path; determining when at least one mobile router is within the range of a first base station; determining a roundtrip time for communication between the first base station and the mobile router of the mobile router being most distant from the first base station; setting, in case this roundtrip time is significantly lower than the current value, a new current value in dependence on the roundtrip time.

Abstract: A system and method for providing wireless data communication between a wireless communication system in an aircraft and a stationary communication server outside the aircraft are disclosed. The wireless communication system comprises a plurality of antennas, and a router in the aircraft configured to transmit and receive wireless data communication to and from a stationary communication server outside the aircraft through at least one ground base station via at least one of the plurality of antennas. The plurality of antennas includes at least one omnidirectional antenna and at least one directional antenna. The router comprises a control unit configured to restrict the wireless data communication to solely occur through the at least one directional antenna the when the current altitude of the aircraft is determined to be above a predefined altitude threshold value.

Abstract: A system and method for providing wireless data communication between a wireless communication system in an aircraft and a stationary communication server outside the aircraft are disclosed. The wireless communication system includes a router network connected to a plurality of antennas, wherein the router network is configured to transmit and receive wireless data communication to and from a stationary communication server outside said aircraft through at least one ground base station via said antennas. The router network includes a plurality of connectivity nodes being physically separated and distributed within the aircraft, the connectivity nodes being connected to each other via a bus, and each connectivity node including a control unit, at least one modem, and preferably a plurality of modems, and a connection to at least one of the antennas. Further, each antenna is connected only to one of the connectivity nodes.

Abstract: A system and method for providing wireless data communication between a wireless communication system in an aircraft and a stationary communication server outside the aircraft are disclosed. The wireless communication system comprises at least one antenna, an altitude determining unit, and a router in the aircraft configured to transmit and receive wireless data communication to and from a stationary communication server outside the aircraft through at least one ground base station via the at least one antenna on a plurality of different frequency bands. The router comprises a control unit configured to disable wireless data communication on at least one frequency band when the current altitude of the aircraft is determined to be above an altitude threshold value. Hereby, it is possible to provide a more stable data link between clients connected to the aircraft wireless communication system and remote external servers.

Abstract: A method and system for wireless communication between a mobile router in a moving vehicle, such as a train, and one or several external server(s) via at least two types of external wireless networks, a first external wireless network type, trackside network, including a plurality of trackside base stations, such as access points, for communication in compliance with a Wireless Local Area Network (WLAN) standard, said trackside base stations being arranged in the vicinity of a vehicle path of travel, and a second external wireless network type, cellular network, communicating via cellular network standard(s), such as in accordance with 3G, 4G or 5G standards, wherein the mobile router is arranged, at least periodically, to simultaneously communicate with the two types of external wireless networks thereby providing at least two concurrently useable external wireless networks.

Abstract: A method for identifying an alteration of an object in the vicinity of a train in operation travelling on a rail track along a route. The train is operative to transport passengers or cargo. The method includes capturing image data of an object located at a point of interest along said route when said train is operational on said rail track. Furthermore, said image data is analyzed to find matching reference image data stored in a data storage device. Based on said matching reference image data, said object is located at a position within said point of interest. Further, said image data is analyzed to find an alteration of said object compared to said matching reference image data. If an alteration is found, an action depending may be taken.

Abstract: A method and a system for receiving streaming media from an external provider onboard a moving vehicle via wireless communication is disclosed. The method includes: checking, upon a request from a client device to obtain a streaming media from said external provider, whether a segment of said streaming media is available in the cache or not; forwarding, when a segment of the requested streaming media is available in the cache, the segment of the streaming media object to the client device from the cache; downloading, when the segment of the requested streaming media is not available in the cache, the segment of the streaming media object from the external server, and forwarding the downloaded segment to the client device, and storing the segment in the cache.

Abstract: A method for wireless communication between a moving vehicle and remote servers through at least one external mobile network. A router in the moving vehicle is configured for receiving and transmitting wireless data to and from both an aggregation server, using aggregated communication over at least two separate links, and at least one other stationary communication server, using non-aggregated communication over a single link. The router is further accessible by a plurality of client devices onboard the moving vehicle. At least one selection rule is provided in the router for selecting whether to use aggregated or non-aggregated communication, and a determination is made, upon a request from a client device to communicate with one of said remote servers, whether one of the at least one rules applies; and if so selecting to use aggregated communication via the at least one other communication server for communication based on the determination.

Abstract: A method and system for wireless communication between a public transport vehicle and a remote server through at least one external mobile network are disclosed. At least one router is provided in the public transport vehicle for receiving and transmitting wireless data to and from a stationary communication server outside the public transport vehicle and to and from at least one client onboard the public transport vehicle. The router determines if a stream of wireless data packets received by said router corresponds to at least one of a VoIP stream and a VoWIFI stream, e.g. by accessing a blacklist with predefined ports and/or destination addresses. It is further determined if the client associated with the stream is within the access area of an access point which is set in a silent compartment mode.

Abstract: A wireless communication system for a train, including: a plurality of antennas arranged on an exterior side of the train; an internal local area network (LAN) inside the train; and at least one router in the train for receiving and transmitting wireless voice communication and data communication to and from a stationary communication server outside the train via the antennas, through at least one exterior mobile network, the at least one exterior mobile network providing at least two concurrently useable data links. The internal LAN provides WiFi communication between the at least one router and at least one mobile terminal located inside the train. Further, the router is arranged to transfer wireless voice communication via voice over WiFi (VoWIFI) between the at least one mobile terminal and the exterior mobile network.