JP5519605B2 - Distributed computer system for railway vehicles, operation control method thereof, and wireless LAN access point - Google Patents

Description

  The present invention relates to a distributed computer system for a railway vehicle suitable for a railway information service providing system that displays information on a plurality of display terminals provided in the vicinity of a door of the railway vehicle.

  As an information service for passengers such as railways, a system that installs display terminals such as LED (Light Emitting Diode) displays and liquid crystal displays at various locations in the vehicle and provides passengers with various information, news, and advertisement images has been put into practical use. ing. In addition, in order to increase passenger satisfaction, display contents on each display terminal are not uniform, and a technique such as selecting and displaying contents suitable for the installation position has been introduced (for example, Patent Document 1).

JP 2003-95105 A

  By the way, in the system that provides information services for passengers such as railways as described above, in order to perform control to select and display the content suitable for the installation position as the display content on each display terminal, It is necessary to set operation parameters to the terminal computer that controls the display terminal so that the display contents corresponding to the installation position of the display terminal are output, and it is important to have a technology for efficiently performing the operation parameter setting work. Become.

  As such a technique, for example, there is a technique of Japanese Patent Application No. 2010-225696 filed previously by the present inventors. According to this technology, “each terminal computer connected wirelessly to the operation control apparatus via a wireless LAN access point installed in each vehicle specifies an installation position in its own vehicle, and determines the specified installation position. The display control is performed by notifying the operation control device, acquiring its own operation parameters, and operating, while the operation control device is arranged at each installation position based on the train organization data including the arrangement pattern of the terminal computer. A corresponding operation parameter is generated, the wireless LAN access point that relayed the notification from the terminal computer is identified to identify the vehicle number of the vehicle, and the operation parameter corresponding to the notified installation position is transmitted to the terminal computer. Technology is described.

  However, in order to apply the technology of the above-mentioned Japanese Patent Application No. 2010-225696, it has been found that there are the following improvements. For example, when setting operation parameters, it is necessary to install a position identification medium in which the installation position in the vehicle is recorded in the vehicle separately from the display terminal and the terminal computer. The medium must be installed without mistake, and the number of man-hours for display terminal outfitting increases. In addition, if the location of the position identification medium is wrong, an incorrect video that should be displayed at a different position is displayed on the screen of the display terminal. This system can diagnose whether the video is correct. Therefore, in order to diagnose whether it is correct or not, it is necessary to visually confirm the contents displayed and the installation position to make a diagnosis.

  In addition, a large number of display terminals and wireless LAN access points are installed in close proximity within a metal-enclosed casing inside the vehicle, and wireless communication is performed between them. This leads to a decrease in communication throughput.

  Therefore, the present invention has been made in view of the above-described improvements, and a typical object thereof is that a position identification medium is unnecessary, communication throughput can be improved, and each terminal computer is provided. Another object of the present invention is to provide a distributed computer system for a railway vehicle that can independently execute a display control operation according to the installation position of the railway vehicle.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  That is, a typical outline is applied to a distributed computer system for railway vehicles, an operation control method for a distributed computer system for railway vehicles, and a wireless LAN access point, and has the following features.

  (1) A distributed computer system for a railway vehicle individually controls display contents of a plurality of display terminals installed in a vehicle that forms a train, and is installed in association with the plurality of display terminals. An operation for distributing the information to be displayed on the plurality of display terminals and controlling the operation of the plurality of terminal computers via the terminal computer, a wireless LAN access point installed in each vehicle, and the wireless LAN access point A distributed computer system for a rail vehicle having a control device.

  Each of the terminal computers notifies the wireless LAN access point of its own terminal identification information, and acquires an operation parameter that defines its operation from the operation control device via the wireless LAN access point. And a display control unit that controls display contents of the display terminal by operating according to the operation parameters acquired by the operation parameter acquisition unit.

  The wireless LAN access point establishes wireless communication with the terminal computer installed in a predetermined area in the vehicle using an antenna with a limited communication range, and the identification information of the antenna with which wireless communication is established and the terminal computer An identification information acquisition unit that acquires combination information with the identification information, combination information of the identification information of the antenna and the identification information of the terminal computer, and its own identification information are notified to the operation control device as in-vehicle position information A position information notification unit.

  The operation control device is configured such that, for each car number of a vehicle that forms a train on which the operation control device is mounted, identification information of the wireless LAN access point installed in the vehicle and a communication range of the antenna are within the vehicle. A composition data storage unit that stores the antenna communication range corresponding to which position of the wireless communication system as composition data, and identification information of the wireless LAN access point included in the in-vehicle position information notified from the wireless LAN access point By identifying the car number of each terminal computer and referring to the composition data from the combination information of the identification information of the antenna and the identification information of the terminal computer included in the in-vehicle position information, The installation position in the vehicle is specified, the operation parameter corresponding to each installation position is generated, and the wireless LAN Via the access point has a terminal computer management unit to be transmitted to the terminal computer, a.

  (2) The operation control method of the distributed computer system for railcars individually controls display contents of a plurality of display terminals installed in a vehicle forming a train, and is installed in association with the plurality of display terminals. A plurality of terminal computers, a wireless LAN access point installed in each vehicle, and information to be displayed on the plurality of display terminals via the wireless LAN access point, and operation of the plurality of terminal computers An operation control method for a distributed computer system for a rail vehicle having an operation control device for controlling the vehicle.

  The wireless LAN access point establishes wireless communication with the terminal computer installed in a predetermined area in the vehicle using an antenna with a limited communication range, and the identification information of the antenna with which wireless communication is established and the terminal computer A step of notifying the operation control apparatus of the combination information of the acquired identification information of the antenna and the identification information of the terminal computer, and the identification information of itself as position information in the vehicle. Have

  In the operation control device, the vehicle number of each terminal computer is identified from the identification information of the wireless LAN access point included in the in-vehicle position information notified from the wireless LAN access point, and the in-vehicle position information From the combination information of the identification information of the antenna and the identification information of the terminal computer included, the identification information of the wireless LAN access point and the antenna of each antenna for each car number forming the train on which it is mounted By referring to the organization data storing the communication range, the installation position of the terminal computer in the vehicle is specified, the operation parameters corresponding to the individual installation positions are generated, and the wireless LAN access point is used. And transmitting to the terminal computer.

  In the terminal computer, it notifies the wireless LAN access point of its own terminal identification information, acquires an operation parameter defining its own operation from the operation control device via the wireless LAN access point, and acquires the operation Controlling the display content of the display terminal by operating according to the parameters.

  (3) A wireless LAN access point individually controls display contents of a plurality of display terminals installed in a vehicle that forms a train, and a plurality of terminal computers installed in association with the plurality of display terminals A wireless LAN access point installed in each vehicle; and an operation control device that distributes information to be displayed on the plurality of display terminals via the wireless LAN access point and controls operations of the plurality of terminal computers; The wireless LAN access point of the distributed computer system for railway vehicles having.

  The wireless LAN access point has a plurality of directional antennas designed to establish radio communication with the terminal computer installed at a specific position by adjusting directivity and installation angle, and the plurality of directivity A directional antenna control unit that switches antennas based on antenna control information transmitted from the operation control device and a directional antenna that is switched by the directional antenna control unit are installed in a predetermined area in the vehicle. An identification information acquisition unit that establishes wireless communication with the terminal computer and acquires combination information of the identification information of the antenna and the identification information of the terminal computer with which wireless communication is established; the identification information of the antenna and the identification information of the terminal computer A position information notification unit that notifies the operation control device of the combination information and the identification information of itself as in-vehicle position information.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  In other words, the effect obtained by the representative one is that a position identification medium is unnecessary, communication throughput can be improved, and display control operations corresponding to respective installation positions can be independently performed on each terminal computer. A distributed computer system for a railway vehicle that can be executed can be provided.

It is a figure which shows the structural example of the distributed computer system for rail vehicles which concerns on one Embodiment of this invention. 1 is a diagram illustrating a configuration of a device mounted on a vehicle, a connection example thereof, and an arrangement example in a distributed computer system for a rail vehicle according to an embodiment of the present invention. In the distributed computer system for railway vehicles according to an embodiment of the present invention, (a) and (b) are diagrams showing display examples of guidance screens having different display contents on the left side and the right side in the traveling direction. FIG. 2 is a functional block diagram illustrating a configuration example of a terminal computer in a distributed computer system for railroad vehicles according to an embodiment of the present invention. 1 is a functional block diagram illustrating a configuration example of a wireless LAN access point in a distributed computer system for a rail vehicle according to an embodiment of the present invention. It is a figure which shows the arrangement | positioning and characteristic of a directional antenna of a wireless LAN access point in the distributed computer system for rail vehicles which concerns on one Embodiment of this invention. 1 is a functional block diagram illustrating a configuration example of an information service management device in a distributed computer system for railway vehicles according to an embodiment of the present invention. It is a sequence diagram which shows the flow of operation | movement until a terminal computer acquires an IP address in the distributed computer system for rail vehicles which concerns on one Embodiment of this invention. It is a sequence diagram which shows the flow of operation | movement which a terminal computer acquires an operation parameter and performs display control in the distributed computer system for rail vehicles which concerns on one Embodiment of this invention. In the distributed computer system for rail vehicles which concerns on one Embodiment of this invention, it is a figure which shows the structure and example of a organization data table. It is a figure which shows the structure and data example of an antenna arrangement pattern definition table in the distributed computer system for rail vehicles which concerns on one Embodiment of this invention. It is a figure which shows the example of data of the initial state of the PC management table which manages a terminal computer in the distributed computer system for rail vehicles which concerns on one Embodiment of this invention. It is a figure which shows the data example after the structure of a PC management table and a terminal computer are registered in the distributed computer system for rail vehicles which concerns on one Embodiment of this invention.

  In the following embodiments, when it is necessary for the sake of convenience, the description will be divided into a plurality of embodiments or sections. However, unless otherwise specified, they are not irrelevant and one is the other. Some or all of the modifications, details, supplementary explanations, and the like exist. In the following embodiments, when referring to the number of elements (including the number, numerical value, quantity, range, etc.), unless otherwise specified, the case is clearly limited to a specific number in principle. The number is not limited to the specific number, and may be a specific number or more.

  Further, in the following embodiments, it is needless to say that the constituent elements (including element steps and the like) are not necessarily indispensable unless otherwise specified and clearly considered essential in principle. Yes. Similarly, in the following embodiments, when referring to the shape and positional relationship of components and the like, the shape and the like of the component are substantially excluding unless explicitly stated or in principle considered otherwise. It shall include those that are approximate or similar to. The same applies to the above numerical values and ranges.

[Outline of Embodiment of the Present Invention]
(1) A distributed computer system for railcars according to an embodiment of the present invention (as an example, a component corresponding to () is added) includes a plurality of display terminals installed in a vehicle that forms a train ( Display contents of the display terminal 40) are individually controlled, a plurality of terminal computers (terminal computer 4) installed in association with the plurality of display terminals, and a wireless LAN access point (wireless LAN) installed in each vehicle An access point 3), and an operation control device (information service management device 2) for distributing information to be displayed on the plurality of display terminals and controlling operations of the plurality of terminal computers via the wireless LAN access point; Is a distributed computer system for railway vehicles (distributed computer system 10).

  Each of the terminal computers notifies the wireless LAN access point of its own terminal identification information, and acquires an operation parameter that defines its operation from the operation control device via the wireless LAN access point. Unit (operation parameter acquisition unit 44) and a display control unit (terminal display control unit 45) that controls the display content of the display terminal by operating according to the operation parameter acquired by the operation parameter acquisition unit. .

  The wireless LAN access point establishes wireless communication with the terminal computer installed in a predetermined area in the vehicle using an antenna with a limited communication range, and the identification information of the antenna with which wireless communication is established and the terminal computer Vehicle identification information, an identification information acquisition unit (antenna ID acquisition unit 33) that acquires combination information with the identification information, combination information of the identification information of the antenna and the identification information of the terminal computer, and its own identification information And a location information notification unit (DHCP server / information service management device communication unit 34) that notifies the operation control device.

  The operation control device is configured such that, for each car number of a vehicle that forms a train on which the operation control device is mounted, identification information of the wireless LAN access point installed in the vehicle and a communication range of the antenna are within the vehicle. A knitting data storage unit (knitting data storage unit 81) that stores an antenna communication range corresponding to which position of the wireless communication device as knitting data, and the wireless included in the in-vehicle position information notified from the wireless LAN access point The number of each terminal computer is identified from the identification information of the LAN access point, and the organization data is referenced from the combination information of the identification information of the antenna and the identification information of the terminal computer included in the in-vehicle position information. By specifying the installation position in the vehicle of the terminal computer, the operation parameter corresponding to each installation position Generated, via the wireless LAN access point, a terminal computer management unit to be transmitted to the terminal computer and (PC manager 24), the.

  (2) An operation control method of a distributed computer system for a railroad vehicle according to an embodiment of the present invention (as an example, a step corresponding to the inside of () is added) is a plurality of installed in a vehicle forming a train. The display contents of the display terminal are individually controlled, a plurality of terminal computers installed in association with the plurality of display terminals, a wireless LAN access point installed in each vehicle, and the wireless LAN access point And an operation control method for a distributed computer system for a railway vehicle, including an operation control device that distributes information to be displayed on the plurality of display terminals and controls operations of the plurality of terminal computers.

  The wireless LAN access point establishes wireless communication with the terminal computer installed in a predetermined area in the vehicle using an antenna with a limited communication range, and the identification information of the antenna with which wireless communication is established and the terminal computer A step of notifying the operation control apparatus of the combination information of the acquired identification information of the antenna and the identification information of the terminal computer, and the identification information of itself as position information in the vehicle. (Steps S321 and S322).

  In the operation control device, the vehicle number of each terminal computer is identified from the identification information of the wireless LAN access point included in the in-vehicle position information notified from the wireless LAN access point, and the in-vehicle position information From the combination information of the identification information of the antenna and the identification information of the terminal computer included, the identification information of the wireless LAN access point and the antenna of each antenna for each car number forming the train on which it is mounted By referring to the organization data storing the communication range, the installation position of the terminal computer in the vehicle is specified, the operation parameters corresponding to the individual installation positions are generated, and the wireless LAN access point is used. It has the step (step S221, S222) which transmits to the said terminal computer.

  In the terminal computer, it notifies the wireless LAN access point of its own terminal identification information, acquires an operation parameter defining its own operation from the operation control device via the wireless LAN access point, and acquires the operation There is a step (steps S422, S423, S424) of controlling the display contents of the display terminal by operating according to the parameters.

  (3) The wireless LAN access point according to the embodiment of the present invention (for example, the components corresponding to () are added) is displayed on the display contents of a plurality of display terminals installed in the vehicle forming the train. A plurality of terminal computers that are individually controlled and installed in association with the plurality of display terminals, a wireless LAN access point installed in each vehicle, and the plurality of display terminals via the wireless LAN access point The wireless LAN access point of the distributed computer system for railway vehicles has an operation control device that distributes information to be displayed on the mobile computer and controls operations of the plurality of terminal computers.

  The wireless LAN access point has a plurality of directional antennas (directional antennas 35) designed to establish radio communication with the terminal computer installed at a specific position by adjusting directivity and installation angle. A directional antenna control unit (directional antenna control unit 31) that switches the plurality of directional antennas based on antenna control information transmitted from the operation control device, and a directional antenna that is switched by the directional antenna control unit An identification information acquisition unit that establishes wireless communication with the terminal computer installed in a predetermined area in the vehicle and acquires combination information of the identification information of the antenna and the identification information of the terminal computer established by wireless communication (Antenna ID acquisition unit 33), combination information of the identification information of the antenna and the identification information of the terminal computer, and its own identification information A location information notification section which notifies the operation control unit as position information (DHCP server and the information service management apparatus communication section 34), the.

  An embodiment of the present invention based on the outline of the embodiment of the present invention described above will be described in detail below based on the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

[One Embodiment of the Present Invention]
A distributed computer system for railway vehicles according to an embodiment of the present invention will be described with reference to FIGS.

<Configuration example of a distributed computer system for railway vehicles>
FIG. 1 is a diagram illustrating a configuration example of a distributed computer system for a rail vehicle according to an embodiment of the present invention. FIG. 1 shows a configuration example of a distributed computer system 10 mounted on a train formed by connecting n vehicles (n is an arbitrary integer greater than or equal to 1) from No. 1 car to No. n car. .

  In FIG. 1, broken line frames represent vehicles forming a train, and each vehicle includes a wireless LAN access point (hereinafter abbreviated as AP (Access Point)) 3 and a plurality of terminal computers (hereinafter referred to as “AP”). PC (abbreviated PC (Personal Computer)) 4, and communication between the two is performed wirelessly.

  Each PC 4 is embedded in a wall or the like close to a display terminal 40 (shown in FIG. 4) such as an LED display or a liquid crystal display installed on an upper part of a door in the vehicle. It is a computer that controls the display contents individually in association with the (place) 40. All these PCs 4 have the same function of displaying various information service screens on the display terminal 40 connected to the PC 4. However, each PC 4 corresponds to the installation position of the display terminal 40 connected to the information service management apparatus 2 so that the display contents can be changed according to the specification and installation position of the display terminal 40. The program is controlled so that various display control operations can be executed according to predetermined operation parameters distributed from. As a result, for example, different information is displayed on the right and left sides of the traveling direction, the guide map indicating the position of the stairs and elevators at the stop station is changed for each vehicle, and the advertisement video to be shown is changed depending on the position in the vehicle. It is possible to perform fine-grained display control.

  The number of display terminals 40 installed in one vehicle (= the number of PCs 4) is arbitrary, but is usually between 2 (installed at both front and rear ends of the vehicle) and 24, and the same number There are trains that are organized only by vehicles on which display terminals 40 are installed, and there are trains that are organized by arbitrarily combining vehicles on which different numbers of display terminals 40 are installed. In the example of FIG. 1, a total of 8 PCs # 1-1 to PC # 1-8 are installed in the first car, and a total of 24 PCs 4 are installed in the second car, PC # 2-1 to PC # 2-24. . The notation PC # j-k represents the kth PC4 of the jth car.

  As shown in FIG. 1, the distributed computer system 10 includes a DHCP (Dynamic Host Configuration Protocol) server 1 that assigns an IP address and the like necessary for IP (Internet Protocol) communication to each PC 4, and the operation of each PC 4. An information service management device 2 that distributes various operating information that is required for provision of operating parameters and information services to be provided, and a LAN (Local Area Network) 5 that connects vehicles are provided. Further, the DHCP server 1, the information service management device 2, and the AP 3 provided in each vehicle are connected to be communicable with each other via the LAN 5, whereby a wireless LAN system including the PC 4 is constructed. The LAN 5 is usually a wired LAN such as a bus type or a loop type, but a different type of wireless LAN that uses a different frequency band from the wireless LAN to which the PC 4 is connected may be used. The DHCP server 1 may be installed in the information service management device 2.

  In addition, various information such as train organization data, operation management data, and content display schedule necessary for providing information services is transmitted from the information distribution center 70 to the information service management device 2 by a train wireless communication means (not shown). Is done.

<Configuration of device mounted on vehicle, connection and arrangement example thereof>
FIG. 2 is a diagram showing the configuration of the device mounted on the vehicle, and its connection and arrangement example. In the example of FIG. 2, the DHCP server 1 and the information service management device 2 are mounted on the vehicle 9 that is the first car, and a total of eight display terminals 40 (not shown) and the PC 4 (PC # 1- 1 to PC # 1-8) and AP3 is installed in the center of the vehicle. Note that the DHCP server 1 and the information service management device 2 may be mounted on any other vehicle 9, or both may be mounted on separate vehicles 9.

  Further, as shown by the thick line in FIG. 2, each device including the PC 4 and the information service management device 2 installed in the same train shares the power source and turns on the supplied power at the same timing. It is connected to the power source 6 of each vehicle 9 to be turned on / off, and in this example, the power source line 7 is turned on / off at almost the same timing. Further, when the two vehicles 9 are connected to each other, the power line 7 and the LAN 5 are also connected to each other.

<Overview of display control operations performed by the terminal computer>
Here, an outline of the display control operation performed by the PC 4 will be described. FIG. 3 is a display example of guidance screens displayed on the information service display terminal 40 in the vehicle when the train is operating, with different display contents on the left side and the right side in the traveling direction. These are all guidance screens displayed when the train approaches the next stop station. FIG. 3A shows an example of a screen displayed on the display terminal 40 on the side where the door opens, FIG. b) is an example of a screen displayed on the display terminal 40 on the opposite side.

  As shown in FIG. 3, in the operation guide display parts 61a and 61b, messages for guiding the names 65a and 65b of the next stop stations, car numbers 66a and 66b of the own vehicle in which the display terminal 40 is installed, and A message or the like for guiding the door directions 67a and 67b to be opened is displayed. In the telop display sections 62a and 62b, in addition to guidance messages accompanying train operations, text messages such as news are displayed so as to move from right to left one after another. In addition, a guide map showing the positions of various facilities at the platform of the next stop station is displayed on the home guide map display sections 63a and 63b, and the display terminal 40 is installed on the vehicle position display sections 64a and 64b. The position of the own vehicle is graphically displayed so that it can be identified.

  As can be seen by comparing FIG. 3 (a) and FIG. 3 (b), even if the display terminal 40 is installed in the same vehicle of the same train, the screen configuration and display are shown on the left and right sides in the traveling direction. Messages to be sent, guide maps, etc. may be different. Further, even with the display terminal 40 installed on the same traveling direction left (right) side of the same train, the car number or figure to be displayed may differ depending on the position of the host vehicle.

  Further, even in the case of the display terminal 40 installed on the left (right) side in the same traveling direction of the same vehicle, there are cases where it is desired to change the contents of messages and advertisements that flow depending on the installation position in the vehicle. Therefore, each PC 4 that controls display control of each display terminal 40 is operated by switching various display patterns based on operation parameters distributed from the information service management device 2 according to the installation position of the display terminal 40. To control the program. Thereby, even if it is the same PC4, it becomes possible to change operation | movement dynamically according to the installation position of the display terminal 40 which it controls, and fine display control according to the installation position of the display terminal 40 is performed. be able to.

<Configuration and function of terminal computer>
Next, the configuration and function of each terminal computer (PC) 4 will be described. FIG. 4 is a functional block diagram showing a configuration example of the terminal computer (PC) 4. Each PC 4 has the same configuration except for unique information such as a PC identification name and a MAC (Media Access Control) address.

  As shown in FIG. 4, the PC 4 includes a power-on detection unit 41, a MAC address acquisition unit 42, an IP address acquisition unit 43, an operation parameter acquisition unit 44, a terminal display control unit 45, a wireless LAN transmission / reception unit 46, and a display content update. Each processing unit of the unit 47, and each storage unit of the operation parameter storage unit 48 and the display content storage unit 49.

  The power-on detection unit 41 detects that the power of the PC 4 has been turned on and activates the MAC address acquisition unit 42. The MAC address acquisition unit 42 reads a MAC address, which is a unique identification number assigned to a wireless LAN card (not shown) mounted on the PC 4, from the wireless LAN card, and sends the read MAC address to the IP address acquisition unit 43. hand over. The IP address acquisition unit 43 notifies the DHCP server 1 of the MAC address delivered from the MAC address acquisition unit 42 and instructs the wireless LAN transmission / reception unit 46 to acquire the IP address, and is delivered from the wireless LAN transmission / reception unit 46. The IP address is delivered to the operation parameter acquisition unit 44.

  The operation parameter acquisition unit 44 notifies the information service management device 2 of the IP address delivered from the IP address acquisition unit 43 and instructs the wireless LAN transmission / reception unit 46 to acquire the operation parameter. The transferred operation parameter is stored in the operation parameter storage unit 48.

  The terminal display control unit 45 generates screen display data to be displayed on the display terminal 40 in accordance with the operation parameters stored in the operation parameter storage unit 48, and transmits the generated display data to the display terminal 40. Further, the terminal display control unit 45 switches the screen configuration and display contents according to display control information such as a next station guidance instruction transmitted from the information service management device 2, or displays a display schedule stored in the display content storage unit 49. Accordingly, various display contents stored in the display content storage unit 49 are displayed on the display terminal 40.

  The display content update unit 47 receives a display schedule and display content for addition and update transmitted from the information service management apparatus 2 via the wireless LAN transmission / reception unit 46, and displays the received display schedule and display content as a display content storage unit. 49 is stored.

  The wireless LAN transmission / reception unit 46 communicates wirelessly with the AP 3 via a wireless LAN card (not shown) and an omnidirectional antenna (not shown), so that wireless communication between the PC 4 and the DHCP server 1 and the information service management device 2 is performed. A communication link is established, and various data are transmitted to and received from the information service management apparatus 2 by IP communication.

<Configuration and function of wireless LAN access point>
Next, the configuration and function of the wireless LAN access point (AP) 3 will be described. FIG. 5 is a functional block diagram showing a configuration example of the wireless LAN access point (AP) 3. As shown in FIG. 5, the AP 3 includes a directional antenna control unit 31, a PC communication unit 32, an antenna ID acquisition unit 33, a DHCP server / information service management device communication unit 34, and a plurality of directional antennas 35.

  The directional antenna control unit 31 switches a plurality of directional antennas 35 based on the antenna control information transferred from the DHCP server / information service management device communication unit 34. The PC communication unit 32 passes the IP address request received from the PC 4 to the DHCP server / information service management device communication unit 34 via the directional antenna 35, and passes the parameter request to the antenna ID acquisition unit 33. The PC communication unit 32 delivers the IP address, operation parameters, display control information, and display content received from the DHCP server / information service management device communication unit 34 to the PC 4. The antenna ID acquisition unit 33 specifies which directional antenna 35 the parameter request delivered from the PC communication unit 32 is received, acquires the antenna ID, and includes the parameter request in the DHCP server and information service management. Delivered to the device communication unit 34.

  The DHCP server / information service management device communication unit 34 delivers the IP address request received from the PC communication unit 32 to the DHCP server 1 and the parameter request received from the antenna ID acquisition unit 33 to the information service management device 2. Further, the DHCP server / information service management device communication unit 34 delivers the IP address received from the DHCP server 1 to the PC communication unit 32. Further, the DHCP server / information service management device communication unit 34 delivers the operation parameters, display control information, and display content received from the information service management device 2 to the PC communication unit 32. The DHCP server / information service management device communication unit 34 passes the antenna control information received from the information service management device 2 to the directional antenna control unit 31.

<Examples of layout and characteristics of directional antennas for wireless LAN access points>
FIG. 6 is a diagram illustrating an arrangement example of the directional antenna 35 of the AP 3 and its characteristics. In the example of FIG. 6, an AP (AP # 2-1) 3 equipped with a total of four directional antennas (AID # 1 to AID # 4) is installed in the center of the vehicle 9, and a total of four non-connected antennas. The case where the display terminal 40 of illustration and PC (PC # 2-1-PC # 2-4) 4 which performs the control is installed is shown. The number of directional antennas and the number of display terminals 40 are the same. The directivity and installation angle of each directional antenna are designed so that the radio waves reach only a specific PC 4 by adjusting the directivity and the installation angle so as to become an ellipse filled with diagonal lines. For example, AID # 1 is PC # 2-1, AID # 2 is PC # 2-2, AID # 3 is PC # 2-3, and AID # 4 is directed so that radio waves can reach only PC # 2-4. Adjust the antenna directivity and installation angle.

<Configuration and function of information service management device>
Next, the configuration and function of the information service management apparatus 2 will be described. FIG. 7 is a functional block diagram illustrating a configuration example of the information service management apparatus 2. As shown in FIG. 7, the information service management device 2 includes a power-on detection unit 21, a wired LAN transmission / reception unit 22, an operation parameter group generation unit 23, a PC management unit 24, a display content distribution control unit 25, and display control information distribution control. Processing unit 26, composition data update unit 27, antenna control information generation unit 28, and information distribution center communication unit 29, composition data storage unit 81, PC management data storage unit 82, and distribution content storage unit 83. And a storage unit.

  The power-on detection unit 21 detects that the information service management device 2 is turned on, and activates the antenna control information generation unit 28 and the operation parameter group generation unit 23. The antenna control information generation unit 28 obtains antenna arrangement information from the antenna arrangement pattern definition table 812, generates antenna control information based on the information, and performs wired LAN transmission / reception units so as to control switching of the directional antenna of each PC 4. 22 is instructed.

  The operation parameter group generation unit 23 is based on the train arrangement data stored in the formation data table 811 of the formation data storage unit 81 and the antenna arrangement pattern stored in the antenna arrangement pattern definition table 812. A group of operation parameters to be distributed to each PC 4 installed in the train is generated, and initial setting of the PC management table 821 stored in the PC management data storage unit 82 is performed. Details of the organization data table 811, the antenna arrangement pattern definition table 812, and the PC management table 821 will be described later with reference to FIGS. 10, 11, and 12.

  The wired LAN transmission / reception unit 22 transmits / receives various data by IP communication with the PC 4 by communicating with the AP 3 via the LAN 5 (see FIG. 1). Note that the IP address of the information service management apparatus 2 is assigned a fixed IP address in advance, and the IP address of each AP 3 is notified from the information distribution center 70 as a part of train organization data, for example. And

  The PC management unit 24 receives the parameter request transmitted from each PC 4 via the wired LAN transmission / reception unit 22, retrieves the antenna ID included in the received parameter request from the PC management table 821, acquires it, and acquires it The operation parameter is returned to the PC 4. Further, the PC identification name, MAC address, and IP address of the PC 4 included in the received parameter request are stored in the PC management table 821.

  The display content distribution control unit 25 receives various distribution contents such as news and advertisements transmitted from the information distribution center 70 via the information distribution center communication unit 29 and stores the received distribution content in the distribution content storage unit 83. At the same time, the PC management unit 24 is requested to distribute distribution contents to each PC 4. The PC management unit 24 transmits the distribution content requested to be distributed from the display content distribution control unit 25 to all the PCs 4 that display the content via the wired LAN transmission / reception unit 22. For example, if the distribution of news is requested, the news is transmitted to all PCs 4 displaying the news. If the distribution destination is a specified distribution content, the content is transmitted only to the corresponding PC 4.

  The display control information distribution control unit 26 receives operation management data such as the position of the own train transmitted from the information distribution center 70 via the information distribution center communication unit 29, and the PC management unit 24 sends each PC 4 to the next station. Requests to transmit display control information for giving instructions such as guidance. The PC management unit 24 transmits the display control information requested to be transmitted from the display control information distribution control unit 26 to all the PCs 4 that perform display control based on the display control information.

<Operations for providing information services for passengers>
Next, an operation for providing the information service for passengers in cooperation with each of the devices described above will be described in detail. FIG. 8 is a sequence diagram showing a flow of operations until each terminal computer (PC) 4 acquires an IP address necessary for IP communication. FIG. 9 is a sequence diagram showing a flow of operations in which each terminal computer (PC) 4 that has acquired an IP address acquires operation parameters from the information service management apparatus 2 and performs display control of the display terminal 40. Hereinafter, the operation until each PC 4 acquires an IP address from the DHCP server 1 will be described with reference to the sequence diagram of FIG. 8, and then the acquired IP address will be described with reference to the sequence diagram of FIG. 9. A description will be given of an operation of performing display control by acquiring an operation parameter defining its own operation from the information service management apparatus 2.

  First, when the power supply 6 is activated and the supply of power to each device is started by the power supply line 7, the power-on detection unit 41 of the PC 4 detects the power-on of the own device (step S411), and acquires the MAC address. The unit 42 is activated. Next, the MAC address acquisition unit 42 acquires the MAC address by reading the MAC address, which is a unique number, from the wireless LAN card mounted on the own device (step S412).

  Similarly, the information service management device 2 that has been turned on detects the power-on of its own device by the power-on detection unit 21 (step S211), and activates the antenna control information generation unit 28. The antenna control information generation unit 28 transmits antenna control information to each AP 3 in order to set AID # 1 (directional antenna) as a transmission / reception antenna (step S212).

  An IP address and operation parameters are set for the PC 4 connected to AID # 1. When the setting is completed, IP addresses and operation parameters are set for AID # 2, # 3... In the same manner, and the IP addresses and operation parameters of all PCs 4 are set.

  Similarly, the AP 3 that has been turned on is set as a transmission / reception antenna based on the antenna control information transmitted from the information service management device 2 via the DHCP server / information service management device communication unit 34 (step S311). For example, if the antenna control information is AID # 1, the transmission / reception antenna is AID # 1, if it is AID # 2, the transmission / reception antenna is AID # 2, and if it is AID # 3, the transmission / reception antenna is AID # 3. In the case of AID # 4, the transmission / reception antenna is set to AID # 4.

  Using a directional antenna set as a transmission / reception antenna, a beacon signal for notifying information necessary for wireless communication such as its own MAC address is transmitted at a predetermined cycle (step S312). When the wireless LAN transmission / reception unit 46 of the PC 4 detects this beacon signal (step S413), an association request for notifying its own MAC address and authentication information is transmitted to establish a communication link with the AP 3 (step S413). S414).

  When this association request is received by the directional antenna of AP3 and the necessary client authentication is performed (step S313), if the connection is permitted, AP3 sends it to PC4 (by specifying the MAC address of PC4). An association response for notifying connection permission and notifying communication parameters when performing wireless communication is transmitted. At this time, there is a possibility of receiving association requests from a plurality of PCs 4, but association requests other than PCs 4 having the highest radio field strength are discarded. The wireless LAN transmitting / receiving unit 46 of the PC 4 that has received this association response (R13) sets the notified communication parameter in the wireless LAN card (step S415), thereby performing wireless communication between the PC 4 and the AP 3 After the communication link (association) is established, the PC 4 can communicate with other devices via the AP 3 thereafter.

  When the association between the PC 4 and the AP 3 is established, the IP address acquisition unit 43 of the PC 4 next transmits a DHCP DISCOVER, which is a broadcast signal for notifying that the IP address is desired to be acquired and its own MAC address, to the AP 3. (Step S416). The DHCP server 1 that has received this broadcast signal relayed by the AP 3 selects one assignable IP address candidate (step S111), and sends the IP address to the PC 4 (specifying the MAC address of the PC 4). A DHCP OFFER that is a signal for notifying a candidate is transmitted.

  The IP address acquisition unit 43 of the PC 4 accepts the IP address candidate notified by the DHCP OFFER received via the wireless LAN transmission / reception unit 46 (step S417), and sends a signal notifying that the IP address candidate is to be used. A certain DHCP REQUEST is transmitted to the DHCP server 1. The DHCP server 1 that has received this signal relayed by the AP 3 performs the lending process of the IP address notified as the IP address candidate (step S112), and sends a DHCP ACK, which is a signal notifying that the lending is completed, to the PC 4 Send. Upon receiving this signal, the IP address acquisition unit 43 of the PC 4 sets the IP address as the IP address of its own device (step S418), and the acquisition of the IP address is completed.

  Next, an operation for performing display control by acquiring an operation parameter defining its own operation from the information service management apparatus 2 using the IP address acquired by the PC 4 will be described. Hereinafter, the operation of each device will be described in detail with reference to the sequence diagram of FIG.

  When the acquisition of the IP address is completed, the operation parameter acquisition unit 44 transmits a parameter request in order to notify the AP 3 of the PC identification name that is its own unique information (step S421). At this time, the wireless LAN transmission / reception unit 46 receives a parameter request IP packet including the MAC address of the own device acquired by the MAC address acquisition unit 42 and the IP address of the own device acquired by the IP address acquisition unit 43. Is transmitted to AP3.

  The antenna ID acquisition unit 33 of the AP 3 specifies the antenna used for receiving the parameter request converted into the IP packet via the PC communication unit 32, acquires the specified antenna ID (AID #) (step S321), The antenna ID (AID #) is assigned to the parameter request, and is transmitted to the information service management device 2 via the DHCP server / information service management device communication unit 34 (step S322).

  When the PC management unit 24 of the information service management device 2 receives the IP packetized parameter request via the wired LAN transmission / reception unit 22, the MAC address of the AP 3 that has transmitted the IP packet with reference to the organization data table 811 From the PC 4, the number of the vehicle in which the AP 3 and the PC 4 are installed is specified, and the record of the PC management table 821 corresponding to the installation position specified by the specified car number and the notified position number is recorded from the PC 4. The notified PC identification name and the MAC address and IP address of the PC 4 included in the received IP packet are registered (step S221). Subsequently, the PC management unit 24 obtains “generated” corresponding to the record from the PC management table 821, and transmits the operation parameter including the acquired operation parameter to the PC 4 (step S222).

  Here, the knitting data table 811 and the antenna arrangement pattern definition table 812 provided in the knitting data storage unit 81 and the PC management table 821 provided in the PC management data storage unit 82 will be described with reference to FIGS.

  FIG. 10 shows a configuration and data example of the knitting data table 811 provided in the knitting data storage unit 81. As shown in FIG. 10, records corresponding to the vehicles forming the train are registered in the formation data table 811 in the order of the car numbers. Each record has a car number, the number of PCs, access point attribute data, and an arrangement pattern as attributes. The car number is a serial number assigned to each vehicle in the order of connection of the vehicles forming the train. The number of PCs is the number of PCs installed in the vehicle (= the number of display terminals 40). The access point attribute data is attribute data of the AP 3 installed in the vehicle, and includes an AP 3 identification number, a wireless communication channel number, a MAC address, and an IP address. The arrangement pattern is an identification name of an arrangement pattern of a place where the display terminal 40 is installed on the vehicle.

  In the data example of FIG. 10, eight PCs 4 are installed in the first car by pattern A, the identification number is “AP # 1”, the wireless communication channel number is “1”, and the MAC address is “0x--”. -Abf0 "and one AP3 having an IP address of" 192.168.1.11 "is installed, 24 cars 4 are installed in the second car by pattern B, and the third car has a pattern C indicates that four PCs 4 are installed. Here, the arrangement pattern indicates how the display terminal 40 is installed in the vehicle, and the directivity and direction of the antenna of the AP 3 are adjusted according to the arrangement pattern.

  FIG. 11 is a configuration and data example of the antenna arrangement pattern definition table 812 provided in the composition data storage unit 81. As shown in FIG. 11, records corresponding to the respective patterns in which the display terminal 40 is arranged on the vehicle are registered in the antenna arrangement pattern definition table 812. Each record has an arrangement pattern, an antenna ID (AID), and a PC installation position as attributes.

  In the data example of FIG. 11, pattern A has four antennas, AID # 1 is PC4 with PC installation location I, AID # 2 is PC4 with PC installation location II, and AID # 3 is PC installation The PC 4 with the location III and AID # 4 indicate that the antenna is arranged so that communication is established with the PC 4 with the PC installation location IV.

  FIG. 12 is an example of data in the initial state of the PC management table 821 generated in the PC management data storage unit 82 when the PC management unit 24 of the information service management apparatus 2 receives train formation data from the information distribution center 70. is there. As shown in FIG. 12, in the PC management table 821 in the initial state, records corresponding to each PC 4 installed in each vehicle that forms the train are registered in order of car number and antenna ID (AID). Each record has a car number, an antenna ID (AID), and a pointer value as attributes.

  The car number is the car number of the vehicle on which the PC 4 is installed. The antenna ID (AID) is a number for identifying the antenna of the PC 4, and is also a number for identifying the installation position in the vehicle of the display terminal 40 associated with the PC 4 from the antenna ID.

  In the pointer value, a pointer value indicating an address of a list of operation parameters to be distributed to the PC 4 is registered. Here, for example, p (A, 1) indicates a pointer value to the list of the first operation parameter to be distributed to the PC 4 whose arrangement pattern is “pattern A”. The train composition data received from the information distribution center 70 is registered in the composition data table 811 (FIG. 10) by the composition data update unit 27. The PC management unit 24 uses the composition data table 811 and the antenna arrangement pattern definition table. 812 (FIG. 11), the operation parameters to be distributed to the respective PCs 4 corresponding to the respective installation positions of the respective vehicles are specified, and pointer values to the list of the specified operation parameters are stored in the PC management table 821. sign up.

  Then, in step S221 of FIG. 9, a record corresponding to the car number and antenna ID of PC4 that has transmitted the parameter request is retrieved from the PC management table 821, and the PC identification name of the PC4 is registered in the record. In subsequent step S222, a list of operation parameters is acquired from the pointer value of the record, and the acquired operation parameters are transmitted to the PC 4.

  By repeating such an operation for each PC 4 that has transmitted the parameter request, as shown in FIG. 13, each record in the PC management table 821 after PC registration has a corresponding PC 4. PC identification name, MAC address, and IP address are additionally registered.

  Returning to FIG. 9 again, the description will be continued. When the operation parameter acquisition unit 44 of the PC 4 receives the operation parameter via the wireless LAN transmission / reception unit 46, the operation parameter acquisition unit 44 stores the received operation parameter in the operation parameter storage unit 48, and the terminal display control unit 45 stores the operation parameter in the operation parameter storage unit 48. By referring to the stored operation parameter and controlling its own operation, necessary display schedule and content are acquired from the display content storage unit 49 and initial display data to be displayed on the display terminal 40 is generated (step S422). . Thereby, the generated display data P1 of the initial display screen is transmitted to the display terminal 40, and the initial display screen is displayed.

  If necessary, train organization data transmitted from the information distribution center 70 to the information service management device 2 and distribution content including display content and display schedule are received by the display content distribution control unit 25 and distributed. Data is stored in the storage unit 83.

  Apart from this, operation management data such as train position information is transmitted from the information distribution center 70 to the information service management device 2, and the display control information distribution control unit 26 of the information service management device 2 receives the received operation management. Based on the data, for example, the PC management unit 24 is requested to distribute display control information for instructing to send a telop for next station guidance. Upon receiving the request, the PC management unit 24 refers to the composition data table 811 (FIG. 10), the antenna arrangement pattern definition table 812 (FIG. 11), the PC management table 821 (FIG. 13), the operation parameter list (FIG. 12), and the like. Thus, the target PC 4 to which the display control information is to be distributed is extracted, and the display control information is distributed to each of the extracted PCs 4 (step S223). Thereby, for example, distribution of unnecessary display control information to the PC 4 corresponding to the display terminal 40 that does not perform telop display is suppressed.

  The terminal display control unit 45 of the PC 4 that has received the display control information refers to the operation parameter stored in the operation parameter storage unit 48 to control its own operation, thereby displaying the display corresponding to the received display control information. Data is updated (step S423), thereby generating, for example, next station guidance telop display data P2 and transmitting it to the display terminal 40. Thereafter, similarly, display control information is transmitted from the information service management device 2 to the PC 4 based on the new operation management data (step S224), and the display data corresponding to the display control information received by the PC 4 is updated. (Step S424), display data P3 is generated and transmitted to the display terminal 40.

  In addition, distribution contents such as the latest news and weather forecast transmitted from the information distribution center 70 and stored in the distribution content storage unit 83 are displayed by the display content distribution control unit 25 to each PC 4 that needs the information. It is distributed appropriately as updated content. The display content update unit 47 of each PC 4 that has received this update content stores the received content and display schedule in the display content storage unit 49.

  Thereafter, the terminal display control unit 45 updates the display data for displaying the updated content according to the latest display schedule stored in the display content storage unit 49. Thereby, the updated display data Pj is generated and transmitted to the display terminal 40.

<Effect of this embodiment>
As described above, according to the distributed computer system 10 for railway vehicles according to the present embodiment, each PC 4 has the operation parameter acquisition unit 44 and the terminal display control unit 45, and the AP 3 has the antenna ID acquisition unit 33. A DHCP server / information service management device communication unit 34 is included, and the information service management device 2 includes a composition data storage unit 81 and a PC management unit 24.

  The AP 3 establishes wireless communication with the PC 4 installed in a predetermined area in the vehicle using an antenna with a limited communication range, and a combination of the identification information of the antenna and the identification information of the PC 4 established by the wireless communication. Information is acquired, and the acquired combination information and its own identification information are notified to the information service management device 2 as in-vehicle position information.

  Further, in the information service management device 2, the number of each PC 4 is identified from the identification information of the AP 3 included in the in-vehicle position information notified from the AP 3, and the antenna identification information included in the in-vehicle position information and the PC 4 By referring to the composition data storing the identification information of the AP 3 and the communication range of the antenna for each car number of the vehicle that is composing the train on which the train is mounted, the combination information with the identification information is stored. An installation position in the vehicle is specified, an operation parameter corresponding to each installation position is generated, and transmitted to the PC 4 via the AP 3.

  Further, the PC 4 notifies the AP 3 of its own terminal identification information, acquires an operation parameter that defines its own operation from the information service management device 2 via the AP 3, and displays it by operating according to the acquired operation parameter. The display content of the terminal 40 is controlled.

  This eliminates the need to install a position identification medium that records the installation position in the vehicle 9. Moreover, since wireless communication is performed between the specific display terminal 40 and the AP 3, the throughput is improved. As a result, a position identification medium is unnecessary, the communication throughput can be improved, and each PC 4 can independently execute a display control operation corresponding to each installation position.

  In particular, the AP 3 includes the directional antenna control unit 31 to adjust the directivity and the installation angle, and thereby establish a plurality of directional antennas designed to establish wireless communication with the PC 4 installed at a specific position. 35 can be switched based on the antenna control information transmitted from the information service management apparatus 2.

  In particular, the information service management device 2 includes the display control information distribution control unit 26, and selects information displayed on the display terminal 40 associated with the PC 4 based on the operation parameter transmitted to the PC 4. Can be distributed to the PC 4.

  Further, the present technology can be realized by a communication means capable of wireless communication other than the wireless LAN.

  In addition, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

  Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Not too long.

  INDUSTRIAL APPLICABILITY The present invention can be used in a distributed computer system for railway vehicles suitable for a railway information service providing system that displays information on a plurality of display terminals provided in the vicinity of a door of the railway vehicle.

DESCRIPTION OF SYMBOLS 1 DHCP server 2 Information service management apparatus 3 Wireless LAN access point 4 Terminal computer 5 LAN
6 Power supply 7 Power line 9 Vehicle 10 Distributed computer system 21 Power-on detection unit 22 Wired LAN transmission / reception unit 23 Operation parameter group generation unit 24 PC management unit 25 Display content distribution control unit 26 Display control information distribution control unit 27 Composition data update unit 28 Antenna control information generation unit 29 Information distribution center communication unit 31 Directional antenna control unit 32 PC communication unit 33 Antenna ID acquisition unit 34 DHCP server and information service management device communication unit 35 Directional antenna 40 Display terminal 41 Power-on detection unit 42 MAC address acquisition unit 43 IP address acquisition unit 44 Operation parameter acquisition unit 45 Terminal display control unit 46 Wireless LAN transmission / reception unit 47 Display content update unit 48 Operation parameter storage unit 49 Display content storage unit 61a, 61b Operation guide display unit 62a, 62b Display section 3a, 63b Home guide map display section 64a, 64b Vehicle position display section 65a, 65b Name of next stop station 66a, 66b Car number 67a, 67b of own vehicle Open door direction 70 Information distribution center 81 Knitting data storage section 811 Knitting Data table 812 Antenna arrangement pattern definition table 82 PC management data storage unit 821 PC management table 83 Distribution content storage unit

Claims (7)

Individually controlling display contents of a plurality of display terminals installed in a vehicle that forms a train, and a plurality of terminal computers installed in association with the plurality of display terminals;
A wireless LAN access point installed in each vehicle;
A distributed computer system for railway vehicles, comprising: an operation control device that distributes information to be displayed on the plurality of display terminals via the wireless LAN access point, and controls operations of the plurality of terminal computers. ,
Each said terminal computer is
An operation parameter acquisition unit that notifies the wireless LAN access point of its own terminal identification information, and acquires an operation parameter that defines its own operation from the operation control device via the wireless LAN access point;
A display control unit that controls the display content of the display terminal by operating according to the operation parameter acquired by the operation parameter acquisition unit,
The wireless LAN access point is
Establishing wireless communication with the terminal computer installed in a predetermined area in the vehicle using an antenna with a limited communication range, and combining information of the identification information of the antenna and the identification information of the terminal computer with which wireless communication is established An identification information acquisition unit to acquire;
A combination of the identification information of the antenna and the identification information of the terminal computer, and a position information notification unit that notifies the operation control device of its own identification information as in-vehicle position information,
The operation control device includes:
For each car number of a vehicle that forms a train on which it is mounted, the identification information of the wireless LAN access point installed in the vehicle and the communication range of the antenna correspond to which position in the vehicle. A knitting data storage unit for storing the antenna communication range as knitting data;
Identifying the number of each terminal computer from the identification information of the wireless LAN access point included in the in-vehicle position information notified from the wireless LAN access point, and identifying the antenna included in the in-vehicle position information By referring to the composition data from the combination information of the information and the identification information of the terminal computer, the installation position of the terminal computer in the vehicle is specified, and the operation parameter corresponding to each installation position is generated, A distributed computer system for railway vehicles, comprising: a terminal computer management unit that transmits to the terminal computer via a wireless LAN access point. In the distributed computer system for railway vehicles according to claim 1,
The wireless LAN access point further includes:
A plurality of directional antennas designed to establish radio communication with the terminal computer installed at a specific position by adjusting directivity and installation angle;
A directional antenna control unit that switches the plurality of directional antennas based on antenna control information transmitted from the operation control device;
A distributed computer system for a railway vehicle, wherein an installation position of the terminal computer in the vehicle is specified from combination information of antenna identification information and terminal computer identification information established by wireless communication. In the distributed computer system for railway vehicles according to claim 1 or 2,
The operation control device further includes:
A distribution control unit that selects information displayed on a display terminal associated with the terminal computer based on the operation parameter transmitted to each terminal computer and distributes the information to the terminal computer; Distributed computer system for rolling stock. Individually controlling display contents of a plurality of display terminals installed in a vehicle that forms a train, and a plurality of terminal computers installed in association with the plurality of display terminals;
A wireless LAN access point installed in each vehicle;
Operation control of a distributed computer system for a rail vehicle having an operation control device that distributes information to be displayed on the plurality of display terminals and controls operations of the plurality of terminal computers via the wireless LAN access point. A method,
The wireless LAN access point establishes wireless communication with the terminal computer installed in a predetermined area in the vehicle using an antenna with a limited communication range, and the identification information of the antenna with which wireless communication is established and the terminal computer A step of notifying the operation control apparatus of the combination information of the acquired identification information of the antenna and the identification information of the terminal computer, and the identification information of itself as position information in the vehicle. When,
In the operation control device, the vehicle number of each terminal computer is identified from the identification information of the wireless LAN access point included in the in-vehicle position information notified from the wireless LAN access point, and the in-vehicle position information From the combination information of the identification information of the antenna and the identification information of the terminal computer included, the identification information of the wireless LAN access point and the antenna of each antenna for each car number forming the train on which it is mounted By referring to the organization data storing the communication range, the installation position of the terminal computer in the vehicle is specified, the operation parameters corresponding to the individual installation positions are generated, and the wireless LAN access point is used. Transmitting to the terminal computer;
In the terminal computer, it notifies the wireless LAN access point of its own terminal identification information, acquires an operation parameter defining its own operation from the operation control device via the wireless LAN access point, and acquires the operation And a step of controlling the display content of the display terminal by operating according to a parameter, and an operation control method for a distributed computer system for railway vehicles. In the operation control method of the distributed computer system for railway vehicles according to claim 4,
In the wireless LAN access point, a plurality of directional antennas designed to establish wireless communication with the terminal computer installed at a specific position by adjusting directivity and installation angle are provided from the operation control device. An operation control method for a distributed computer system for railway vehicles, wherein switching is performed based on transmitted antenna control information. In the operation control method of the distributed computer system for rail vehicles according to claim 4 or 5,
In the operation control device, on the basis of the operation parameter transmitted to each of the terminal computers, information displayed on a display terminal associated with the terminal computer is selected and distributed to the terminal computer. An operation control method for a distributed computer system for railway vehicles. Individually controlling display contents of a plurality of display terminals installed in a vehicle that forms a train, and a plurality of terminal computers installed in association with the plurality of display terminals;
A wireless LAN access point installed in each vehicle;
The wireless of the distributed computer system for railway vehicles, including an operation control device that distributes information to be displayed on the plurality of display terminals and controls operations of the plurality of terminal computers via the wireless LAN access point. A LAN access point,
A plurality of directional antennas designed to establish radio communication with the terminal computer installed at a specific position by adjusting directivity and installation angle;
A directional antenna control unit that switches the plurality of directional antennas based on antenna control information transmitted from the operation control device;
Using the directional antenna switched by the directional antenna control unit, establishes wireless communication with the terminal computer installed in a predetermined area in the vehicle, and identifies the identification information of the antenna and the terminal computer established by wireless communication. An identification information acquisition unit that acquires combination information with information;
And a position information notification unit that notifies the operation control device of the combination information of the identification information of the antenna and the identification information of the terminal computer and the identification information of the terminal as in-vehicle position information. LAN access point.

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