Driver assistance systems

Abstract

We provide a driver assistance system that can reduce implementation costs compared to conventional systems. [Solution] A driver assistance system comprising a wireless system that transmits driver assistance information to a train entering a platform, the system comprising a train entry detection device that detects when a train enters a platform, the train entry detection device detects the arrival of a train based on a response wave that is no longer received from the communication station when the train enters a platform.

Description

Technical Field

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[0001] The present invention relates to a driving support system.

Background Art

[0002] Patent Document 1 below discloses a driving support system that recognizes the track into which a train formation has entered and transmits the video corresponding to the recognized track to the train formation. This driving support system includes a first wireless system that detects the track into which a train formation has entered, and a second wireless system that acquires video data obtained by imaging the station platform from an imaging device. The second wireless system provides the video data of the platform corresponding to the track detected by the first wireless system to the train formation that has entered the track detected by the first wireless system.

Prior Art Documents

Patent Documents

[0003] }

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the above background art, in addition to the second wireless system, the first wireless system is a component. That is, the background art is a driving support system that requires two different wireless systems, and there is a problem that the introduction cost becomes high.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a driving support system capable of reducing the introduction cost compared with the conventional one.

Means for Solving the Problems

[0006] To achieve the above objective, the present invention provides a first solution relating to a driver assistance system, comprising a wireless system that transmits platform video to a train entering a platform, wherein the system includes a train entry detection device that detects when the train enters the platform, and the train entry detection device detects the entry of the train based on a response wave that is no longer received from the communication station when the train enters the platform.

[0007] In the present invention, as a second solution relating to the driver assistance system, in the first solution described above, the entry detection device employs a means to transmit the driver assistance information that the entry vehicle has entered the line to the entry vehicle when it becomes unable to receive the response wave from the communication station due to the entry of the entry vehicle.

[0008] In the present invention, as a third solution relating to the driver assistance system, the wireless system employs a method in which it transmits platform video toward the incoming train by switching the transmission direction based on a beamforming function, in the first or second solution described above.

[0009] In the present invention, as a fourth solution relating to the driver assistance system, in any of the first to third solutions described above, the entry detection device is wirelessly connected to the entry vehicle or the communication station using a virtual LAN (Local Area Network).

[0010] In the present invention, as a fifth solution relating to the driver assistance system, the means adopted is that, in any of the first to fourth solutions described above, the platform is provided at a station and the vehicle entering the station is a train. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a driver assistance system that can reduce the introduction cost compared to conventional systems. [Brief explanation of the drawing]

[0012] [Figure 1] This is a system configuration diagram showing the overall configuration of a driver assistance system according to one embodiment of the present invention. [Figure 2] This is a block diagram showing the electrical configuration of a driver assistance system according to one embodiment of the present invention. [Figure 3] This is a schematic diagram showing the state in which an incoming train has entered track 1 in a driver assistance system according to one embodiment of the present invention. [Figure 4] This is a schematic diagram showing the state in which an incoming train has entered track 2 in a driver assistance system according to one embodiment of the present invention. [Modes for carrying out the invention]

[0013] One embodiment of the present invention will be described below with reference to the drawings. First, the overall configuration of the driver assistance system A according to this embodiment will be described with reference to Figure 1. As shown in Figure 1, the driver assistance system A according to this embodiment includes a first camera 11, a first encoder 21, a second camera 12, a second encoder 22, an AP / PCP 3, a first detection STA 41, a first in-vehicle STA 51, a first decoder 61, a first monitor 71, a second detection STA 42, a second in-vehicle STA 52, a second decoder 62, and a second monitor 72.

[0014] In this specification, "AP" refers to an access point in a communication system, "PCP" refers to a port control protocol in a communication system, and "STA" refers to a station in a communication system.

[0015] Of the components that make up the driver assistance system A, the AP / PCP1, the first encoder 21, the first camera 11, the second encoder 22, and the second camera 12 are installed on platform H as shown in the figure. Platform H is a long structure installed at a train station and includes tracks 1 and 2 as shown in the figure.

[0016] In this platform H, Line 1 and Line 2 are provided along a pair of long sides that are parallel to each other in the long platform H. Line 1 is a track (train passageway) provided along one of the pair of long sides in the platform H, and the first train T1 enters and stops as an incoming vehicle. On the other hand, Line 2 is a track (train passageway) provided along the other of the pair of long sides, and the second train T2 enters and stops as an incoming vehicle.

[0017] As shown in the figure, the first camera 11 is provided near one end on the Line 1 side of the long platform H. That is, this first camera 11 is provided at the end (the advancing direction side end) in the incoming direction (advancing direction) of the first train T1 on the Line 1 side of the platform H.

[0018] This first camera 11 is a photographing device that photographs the entire area (Line 1 platform) along Line 1. The video (Line 1 platform video) photographed by this first camera 11 is Line 1 platform state information indicating the state of the Line 1 platform. The first camera 11 outputs such a Line 1 platform video to the first encoder 21.

[0019] The first encoder 21 processes the Line 1 platform video acquired from the first camera 11 using a predetermined protocol and outputs it to the AP / PCP3. That is, the first encoder 21 outputs the Line 1 platform video, which is Line 1 platform state information, to the AP / PCP3 as first incoming management information that assists in the incoming management of the first train T1.

[0020] As shown in the figure, the second camera 12 is provided near one end on the Line 2 side of the long platform H. That is, this second camera 12 is provided at the end (the advancing direction side end) in the incoming direction (advancing direction) of the second train T2 on the Line 2 side of the platform H.

[0021] The second camera 12 is a photographing device that photographs the entire area (second-track home) along the second track in the long home H. The video (second-track home video) photographed by this second camera 12 is second-track home state information indicating the state of the second-track home. The second camera 12 outputs such a second-track home video to the second encoder 22.

[0022] The second encoder 22 processes the second-track home video acquired from the second camera 12 using a predetermined protocol and outputs it to the AP / PCP3. That is, the second encoder 22 outputs the second-track home video, which is the second-track home state information, to the AP / PCP3 as second entry management information that assists in the entry management of the second train T2.

[0023] The AP / PCP3 is an access point (AP) or port control protocol (PCP). This AP / PCP3 is provided near the end on the traveling direction side of the home H, similar to the first camera 11 and the second camera 12. Note that the AP / PCP3 corresponds to the entry detection device of the present invention.

[0024] The AP / PCP3 performs wired communication in accordance with a predetermined wired communication protocol with the first encoder 21 and the second encoder 22, and performs wireless communication in accordance with a predetermined wireless communication protocol with the first detection STA41, the first in-vehicle STA51, the second detection STA42, and the second in-vehicle STA52.

[0025] For example, the AP / PCP3 performs wired communication in accordance with a wired LAN (Local Area Network) with the first encoder 21 and the second encoder 22, and performs wireless communication in accordance with a wireless LAN protocol with the first detection STA41, the first in-vehicle STA51, the second detection STA42, and the second in-vehicle STA52.

[0026] Here, the AP / PCP3 has a beamforming function, and by switching the transmission direction based on the beamforming function, it performs wireless communication with the first detection STA41 and the first in-vehicle STA51 or the second detection STA42 and the second in-vehicle STA52.

[0027] This AP / PCP3 acquires video of platform 1 from the first encoder 21 and video of platform 2 from the second encoder 22. The AP / PCP3 also emits a radio signal (radio wave for platform 1 detection) towards the first detection STA41 to detect the arrival of the first train T1 on platform 1.

[0028] Furthermore, AP / PCP3 transmits a radio signal (track 2 detection radio wave) to the second detection STA42 to detect the arrival of the second train T2 on track 2. In addition, AP / PCP3 transmits the track 1 platform video acquired from the first encoder 21 as a track 1 platform video wave to the first in-car STA51 of the first train T1, and transmits the track 2 platform video acquired from the second encoder 22 as a track 2 platform video wave to the second in-car STA52 of the second train T2.

[0029] The first detection STA41 is a component of the driver assistance system A, which is fixedly positioned on the ground. As shown in the figure, the first detection STA41 is positioned on the ground opposite the platform of track 1, with track 1 in between, and near the end on the side facing the direction of travel. The first detection STA41 corresponds to the communication station of the present invention.

[0030] Such a first detection STA41 communicates wirelessly with AP / PCP3 in accordance with a predetermined wireless communication protocol. Specifically, the first detection STA41 receives a wireless signal (rail track detection radio wave) incoming from AP / PCP3 and radiates a response wireless signal (rail track response wave) to the rail track detection radio wave toward AP / PCP3.

[0031] Of the components that make up the driver assistance system A, the first in-car STA51, the first decoder 61, and the first monitor 71 are installed on the first train T1 as shown in the figure. In other words, the first in-car STA51, the first decoder 61, and the first monitor 71 are onboard equipment of the first train T1.

[0032] The first in-car STA51 is located near the driver's cab of the first train T1, that is, near the front of the first train T1 in the direction of entry (direction of travel). This first in-car STA51 communicates wirelessly with AP / PCP3 in accordance with a predetermined wireless communication protocol. Specifically, the first in-car STA51 receives the platform video signal for track 1 and outputs it to the first decoder 61 as a platform video signal for track 1.

[0033] The first decoder 61 decodes (demodulates) the Platform 1 video signal input from the STA 51 inside the first car, thereby obtaining a Platform 1 video signal. The first decoder 61 outputs this Platform 1 video to the first monitor 71.

[0034] The first monitor 71 is a display device that shows the image of platform 1 and is installed near the driver's seat of the first train T1. Specifically, the first monitor 71 displays the image of platform 1 as driving support information on the screen based on the platform 1 image signal input from the first decoder 61. The driver of the first train T1 can, for example, confirm the condition of platform 1 by visually checking the image of platform 1 displayed on the first monitor 71 when the first train T1 is about to depart.

[0035] The second detection STA42 is a component of the driver assistance system A, which is fixedly positioned on the ground. As shown in the figure, the second detection STA42 is positioned on the ground opposite the platform of track 2, with track 2 in between, and near the end on the side facing the direction of travel. The second detection STA42, like the first detection STA41, corresponds to the communication station of the present invention.

[0036] Such a second detection STA42 communicates wirelessly with AP / PCP3 in accordance with a predetermined wireless communication protocol. Specifically, the second detection STA42 receives a wireless signal (wireless signal for detecting the second line) incoming from AP / PCP3 and radiates a response wireless signal (wireless response wave) to the AP / PCP3 in response to the wireless signal for detecting the second line.

[0037] Furthermore, of the components that constitute the driver assistance system A, the second in-car STA52, the second decoder 62, and the second monitor 72 are installed in the second train T2 as shown in the figure. In other words, the second in-car STA52, the second decoder 62, and the second monitor 72 are onboard equipment of the second train T2.

[0038] The second in-car STA52 is located near the driver's cab of the second train T2, that is, near the front of the second train T2 in the direction of entry (direction of travel). This second in-car STA52 communicates with AP / PCP3 in accordance with a predetermined wireless communication protocol. Specifically, the second in-car STA52 receives the platform video signal for track 2 and outputs it to the second decoder 62 as a platform video signal for track 2.

[0039] The second decoder 62 decodes (demodulates) the platform video signal for platform 2 input from the second in-car STA 52 to obtain a platform video signal for platform 2. The second decoder 62 outputs this platform video for platform 2 to the second monitor 72.

[0040] The second monitor 72 is a display device that shows the image of platform 2 and is installed near the driver's seat of the second train T2. ​​Specifically, the second monitor 72 displays the image of platform 2 as driver support information based on the platform 2 platform image signal input from the second decoder 62. The driver of the second train T2 can, for example, confirm the condition of platform 2 by viewing the image of platform 2 displayed on the second monitor 72 when the second train T2 is about to depart.

[0041] Next, the communication system of the driver assistance system A according to this embodiment will be described with reference to Figure 2.

[0042] As shown in Figure 2, this communication system is constructed using a wired LAN (Ethernet) and a wireless LAN using a VLAN (Virtual Local Area Network). In addition to a wireless communication function that transmits platform video of track 1 and platform 2 to the incoming trains, train 1 T1 and train 2 T2, this communication system also has a wireless communication function that transmits and receives radio waves for track 1 detection, track 1 response waves, track 2 detection radio waves, and track 2 response waves between the first detection STA41 and the second detection STA42.

[0043] The first encoder 21, the second encoder 22, the first decoder 61, and the second decoder 62 are each equipped with LAN ports 21a, 22a, 61a, and 62a. In addition, the first encoder 21, the second encoder 22, the first decoder 61, and the second decoder 62 are each equipped with HDMI ports 21b, 22b, 61b, and 62b.

[0044] Furthermore, AP / PCP3 is equipped with two LAN ports 31 and 32, two VLAN tag insertion units 33 and 34, and a wireless interface unit 35. In addition, the first in-vehicle STA 51 is equipped with a LAN port 51a and a wireless interface unit 51b, and the second in-vehicle STA 52 is equipped with a LAN port 52a and a wireless interface unit 52b.

[0045] The first encoder 21 is wired to the first LAN port 31 of AP / PCP3 via its own LAN port 21a, and is also wired to the first camera 11 via its own HDMI port 21b. The second encoder 22 is wired to the second LAN port 32 of AP / PCP3 via its own LAN port 22a, and is also wired to the second camera 12 via its own HDMI port 22b.

[0046] The first decoder 61 is wired to the LAN port 51a of the first in-car STA 51 via its own LAN port 61a, and is also wired to the first monitor 71 via its own HDMI port 61b. The second decoder 62 is wired to the LAN port 52a of the second in-car STA 52 via its own LAN port 62a, and is also wired to the second monitor 72 via its own HDMI port 62b.

[0047] AP / PCP3 is wired to the LAN port 21a of the first encoder 21 via the first LAN port 31, and also wired to the LAN port 22a of the second encoder 22 via the second LAN port 32. In addition, AP / PCP3 is wirelessly connected to the wireless interface unit 51b of the first in-vehicle STA 51 and the wireless interface unit 52b of the second in-vehicle STA 52 via the wireless interface 35.

[0048] In this AP / PCP3, the first LAN port 31 is internally connected to the first VLAN tag insertion unit 33, and the second LAN port 32 is internally connected to the second VLAN tag insertion unit 34. Furthermore, the first VLAN tag insertion unit 33 and the second VLAN tag insertion unit 34 are internally connected to the wireless interface 35.

[0049] The first VLAN tag insertion unit 33 inserts a pre-configured first virtual ID tag (VLAN_ID tag) for the first in-vehicle STA 51 into the frame header of the LAN frame input from the first LAN port 31 and outputs it to the wireless interface 35. Meanwhile, the second VLAN tag insertion unit 34 inserts a pre-configured second virtual ID tag (VLAN_ID tag) for the second in-vehicle STA 52 into the frame header of the LAN frame input from the second LAN port 32 and outputs it to the wireless interface 35.

[0050] The first in-car STA51 is wired to the LAN port 61a of the first decoder 61 via LAN port 51a, and wirelessly connected to the wireless interface unit 35 of AP / PCP3 via wireless interface unit 51b. The second in-car STA52 is wired to the LAN port 62a of the second decoder 62 via LAN port 52a, and wirelessly connected to the wireless interface unit 35 of AP / PCP3 via wireless interface unit 52b.

[0051] Although not shown in Figure 2, the first detection STA41 and the second detection STA42 are also components of the communication system of the driver assistance system A according to this embodiment. The first detection STA41 and the second detection STA42 each have a wireless interface. The first detection STA41 and the second detection STA42 are connected to the wireless interface 35 of AP / PCP3 via the wireless interfaces.

[0052] Here, the first VLAN tag insertion unit 33 in AP / PCP3 stores a first virtual ID tag (VLAN_ID tag) pre-configured for the first in-vehicle STA 51, as well as a third virtual ID tag (VLAN_ID tag) pre-configured for the first detection STA 41. In addition, the second VLAN tag insertion unit 34 in AP / PCP3 stores a second virtual ID tag (VLAN_ID tag) pre-configured for the second in-vehicle STA 52, as well as a fourth virtual ID tag (VLAN_ID tag) pre-configured for the second detection STA 42.

[0053] AP / PCP3 switches the communication partner to either the first in-vehicle STA51 or the first detection STA41 by switching the first virtual ID tag and the third virtual ID tag inserted into the transmitted LAN frame. AP / PCP3 also switches the communication partner to either the second in-vehicle STA52 or the second detection STA42 by switching the second virtual ID tag and the fourth virtual ID tag inserted into the transmitted LAN frame.

[0054] Next, the operation of the driver assistance system A according to this embodiment will be described in detail with reference to Figures 3 and 4.

[0055] In this driver assistance system A, under normal conditions, AP / PCP3 establishes a wireless connection with the first detection STA41 and the second detection STA42. After establishing this wireless connection, AP / PCP3 emits a radio wave for detecting track 1 towards the first detection STA41 and a radio wave for detecting track 2 towards the second detection STA42.

[0056] Then, when the first detection STA41 successfully receives the radio wave for detecting track 1, it radiates a track 1 response wave toward AP / PCP3. Similarly, when the second detection STA42 successfully receives the radio wave for detecting track 2, it radiates a track 2 response wave toward AP / PCP3. AP / PCP3 determines that there are no trains on track 1 by receiving the track 1 response wave from the first detection STA41. AP / PCP3 also determines that there are no trains on track 2 by receiving the track 2 response wave from the second detection STA42.

[0057] In other words, in a steady state, AP / PCP3 monitors the presence or absence of trains entering tracks 1 and 2 by emitting a track 1 detection radio wave to the first detection STA41, which is facing away from track 1, and a track 2 detection radio wave to the second detection STA42, which is facing away from track 2.

[0058] In this state, as shown in Figure 3, when the first train T1 enters track 1, the track 1 detection radio wave is no longer received by the first detection STA41, and therefore the AP / PCP3 no longer receives the track 1 response wave. As a result, the AP / PCP3 determines that the first train T1 has entered track 1.

[0059] As a result, AP / PCP3 switches its wireless connection with the first detection STA41 to the first in-car STA51 of the first train T1. In other words, AP / PCP3 switches its wireless communication partner from the first detection STA41 to the first in-car STA51 (first train T1). Then, AP / PCP3 transmits the platform video of track 1 acquired from the first camera 11 to the first in-car STA51 via the first encoder 21.

[0060] In the first train T1, the above-mentioned video of platform 1 is input from the first car's STA51 to the first monitor 71 via the first decoder 61. The driver of the first train T1 then understands the condition of platform 1 by visually checking the video of platform 1 displayed on the first monitor 71. Based on the condition of platform 1, the driver then departs the first train T1.

[0061] On the other hand, as shown in Figure 4, when the second train T2 enters track 2, the track 2 detection radio wave is no longer received by the second detection STA42, and the AP / PCP3 no longer receives the track 2 response wave. As a result, the AP / PCP3 determines that the second train T2 has entered track 2.

[0062] As a result, AP / PCP3 switches its wireless connection with the second detection STA42 to the second in-car STA52 of the second train T2. ​​In other words, AP / PCP3 switches its wireless communication partner from the second detection STA42 to the second in-car STA52 (second train T2). Then, AP / PCP3 transmits the platform video of track 2 acquired from the second camera 12 to the second in-car STA52 via the second encoder 22.

[0063] In the second train T2, the above-mentioned video of platform 2 is input from the STA52 inside the second car to the second monitor 72 via the second decoder 62. The driver of the second train T2 then understands the condition of platform 2 by viewing the video of platform 2 displayed on the second monitor 72. Based on the condition of platform 2, the driver then departs the second train T2.

[0064] The driver assistance system A according to this embodiment includes a wireless system that transmits driver assistance information (platform video of track 1 and platform video of track 2) to the first train T1 and the second train T2 (entering vehicles) entering platform H, and includes an AP / PCP3 (entry detection device) that detects when the first train T1 and the second train T2 (entering vehicles) enter platform H.

[0065] Furthermore, in this driver assistance system A, the AP / PCP3 (track entry detection device) detects the arrival of the first train T1 and the second train T2 (incoming trains) based on the track 1 response wave and track 2 response wave (response wave) which are no longer received from the first detection STA41 and second detection STA42 (communication station) when the first train T1 and the second train T2 (incoming trains) enter platform H.

[0066] According to this embodiment, in addition to the wireless system that transmits driver assistance information (video of platform 1 and platform 2), there is no need to provide a wireless system for detecting the arrival of the first train T1 and the second train T2 (arriving vehicles). Therefore, according to this embodiment, it is possible to provide a driver assistance system A that can reduce the introduction cost compared to conventional systems.

[0067] Furthermore, in the driver assistance system A according to this embodiment, when the AP / PCP3 (track entry detection device) can no longer receive the track 1 response wave and track 2 response wave (response wave) from the first detection STA41 and second detection STA42 (communication station) due to the entry of the first train T1 and the second train T2 (entering vehicles), it transmits driver assistance information indicating the entry of the first train T1 and the second train T2 (entering vehicles) to the first train T1 and the second train T2 (entering vehicles). According to this embodiment, it is possible to more reliably detect the entry of the first train T1 and the second train T2 (entering vehicles).

[0068] Furthermore, in the driver assistance system A according to this embodiment, the wireless system transmits driver assistance information (platform video of track 1 and platform video of track 2) to the first train T1 and the second train T2 (incoming trains) by switching the transmission direction based on the beamforming function. According to this embodiment, it is possible to accurately transmit driver assistance information (platform video of track 1 and platform video of track 2) to the first train T1 and the second train T2 (incoming trains).

[0069] Furthermore, in the driver assistance system A according to this embodiment, the AP / PCP3 (railway entry detection device) is wirelessly connected to the first train T1 and the second train T2 (entering vehicles) or the first detection STA41 and the second detection STA42 (communication stations) using a virtual LAN (Local Area Network). According to this embodiment, it is possible to accurately switch the wireless connection between the first train T1 and the second train T2 (entering vehicles) and the first detection STA41 and the second detection STA42 (communication stations).

[0070] Furthermore, in the driver assistance system A according to this embodiment, platform H is provided at a station, and the first train T1 and the second train T2 (arriving vehicles) are trains. According to this embodiment, it is possible to detect the arrival of the first train T1 and the second train T2 (arriving vehicles) at platform H of the station.

[0071] The present invention is not limited to the embodiments described above, and for example, the following modifications are possible. (1) In the above embodiment, the detection of the first train T1 and the second train T2 (entering vehicles) entering platform H of the station has been described, but the present invention is not limited thereto. The present invention can also be applied to platforms where vehicles other than trains enter, for example, platforms where transport vehicles enter.

[0072] (2) In the above embodiment, a platform H having track 1 and track 2 has been described, but the present invention is not limited thereto. The number of platforms H is not limited to one, and there may be multiple platforms H. Also, the number of tracks is not limited to two, and there may be one or three or more.

[0073] (3) In the above embodiment, the first camera 11 and the first camera 12 were installed on the station platform H on the side in the direction of travel in the direction of arrival of the first train T1 and the second train T2 (arriving train), but the present invention is not limited thereto. For example, the first camera 11 and the first camera 12 may be installed on the side opposite to the direction of travel in the direction of arrival of the first train T1 and the second train T2 (arriving train).

[0074] (4) The wireless system in the above embodiment transmits platform video of platform 1 and platform video of platform 2 (platform video) to the first train T1 and the second train T2 (entering train) as driving support information to assist in the operation of the first train T1 and the second train T2 (entering train). However, the driving support information of the present invention is not limited to platform video of platform 1 and platform video of platform 2 (platform video). For example, other video and various information may be transmitted to the first train T1 and the second train T2 (entering train) as driving support information in place of or in addition to the platform video. [Explanation of Symbols]

[0075] A: Driver assistance system, H: Platform, T1: Train 1, T2: Train 2, 11: Camera 1, 12: Camera 2, 21: Encoder 1, 22: Encoder 2, 3: AP / PCP (Train Entry Detection Device), 41: STA (Communication Station) for detection 1, 42: STA (Communication Station) for detection 2, 51: In-cabin STA 1, 52: In-cabin STA 2, 61: Decoder 1, 62: Decoder 2, 71: Monitor 1, 72: Monitor 2

Claims

1. A driver assistance system comprising a wireless system that transmits driver assistance information to trains entering the station, The system includes an entry detection device that detects when the aforementioned train enters the platform, The aforementioned train arrival detection device is a driver assistance system characterized by detecting the arrival of a train based on a response wave that ceases to be received from the communication station when the train enters the platform.

2. The driver assistance system according to claim 1, characterized in that when the entry detection device becomes unable to receive the response wave from the communication station due to the entry of the entry vehicle, it transmits the driver assistance information that the entry vehicle has entered the line to the entry vehicle.

3. The driver assistance system according to claim 1 or 2, characterized in that the wireless system transmits platform video toward the incoming train by switching the transmission direction based on a beamforming function.

4. The driver assistance system according to claim 1 or 2, characterized in that the track entry detection device is wirelessly connected to the track entry vehicle or the communication station using a virtual LAN (Local Area Network).

5. The aforementioned platform is located at the station. The driver assistance system according to claim 1 or 2, characterized in that the vehicle entering the line is a train.

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