JP5922050B2 - Distributed computer system for railway vehicles and operation control method thereof - Google Patents

Description

  The present invention relates to a railway vehicle computer system 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 a 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, the display content on each display terminal is not uniform, and a technique has been introduced such as selecting and displaying content suitable for the installation position. In order to perform such control, it is necessary to set an operation parameter so that the display contents corresponding to the installation position of the display terminal are output to the terminal computer that controls each display terminal. The technology to perform work efficiently is important.

  As such a technique, there is, for example, Patent Document 1. In this Patent Document 1, “each terminal computer connected wirelessly to an operation control device via a wireless LAN access point installed in each vehicle has specified and specified an installation position in its own vehicle. Display control is performed by notifying the operation control device of the installation position, acquiring its own operation parameters, and operating, while the operation control device is configured based on train formation data including the arrangement pattern of the terminal computer. The operation parameter corresponding to the installation position 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 stored in the terminal computer. "Transmit" technology is described.

JP 2012-76681 A

  However, in order to apply the technique of Patent Document 1, 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 when setting the operation parameter. Therefore, at the time of installation work, the position identification medium has to be installed without mistake for a plurality of installation positions, and there has been a problem that the number of man-hours for outfitting the display terminal increases.

  In addition, if the installation location of the position identification medium is wrong, an incorrect video to be displayed at a different position is displayed on the screen of the display terminal. However, in the system of Patent Document 1, it is impossible to diagnose whether the video is correct. In order to diagnose whether the video is correct, the content and the installation position that are actually displayed are visually confirmed, Need to diagnose.

  An object of the present invention is to provide a distributed computer system for a railway vehicle that can cause each terminal computer to independently execute a display control operation corresponding to each installation position without using a position identification medium. .

  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 and an operation control method for a distributed computer system for railway vehicles, and has the following characteristics.

  The distributed computer system for railway vehicles 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 a 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 a plurality of display terminals via the wireless LAN access point and controls operations of a plurality of terminal computers. is there.

  Each terminal computer acquires the installation direction of its own terminal computer and outputs it as installation direction information, the installation direction information acquired by the first installation direction acquisition unit, and its own An operation parameter acquisition unit that notifies the wireless LAN access point of terminal identification information and acquires an operation parameter that defines its own operation from the operation control device via the wireless LAN access point, and an operation acquired by the operation parameter acquisition unit A display control unit that controls display contents of the display terminal by operating according to the parameters.

  The wireless LAN access point measures the radio field intensity from each terminal computer that receives it, acquires the radio field intensity measurement unit that outputs the measurement result, and the installation direction of its own wireless LAN access point, as AP installation direction information Establishing wireless communication with the second installation direction acquisition unit that outputs and the terminal computer, the radio field intensity measured by the radio field intensity measurement unit, the terminal identification information, the installation direction information of the terminal computer, the AP installation direction information, and the identification of itself A position information notification unit that notifies the operation control device of information.

  For each car number of the vehicle that forms the train on which it is mounted, the operation control device identifies the identification information of the wireless LAN access point installed in the vehicle and the terminal computer installed in the vehicle. Identify the car number of each terminal computer from the organization data storage unit that stores the terminal arrangement pattern data indicating the relationship between the installation position and the radio wave intensity, and the identification information of the wireless LAN access point notified from the wireless LAN access point By referring to the terminal arrangement pattern data from the installation direction information of the terminal computer, the radio wave intensity, and the AP installation direction information of the wireless LAN access point notified from the wireless LAN access point, the installation position of the terminal computer in the vehicle And generate operation parameters corresponding to each installation position, and Via point, and a terminal computer management unit to be transmitted to the terminal computer.

  In addition, the operation control method of the distributed computer system for railway vehicles 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 control device that distributes information to be displayed on a plurality of display terminals via a plurality of terminal computers, a wireless LAN access point installed in each vehicle, and controls the operations of the plurality of terminal computers Is an operation control method for controlling the operation of a distributed computer system for railway vehicles.

  The wireless LAN access point establishes wireless communication with the terminal computer installed in the vehicle, acquires the installation direction information of the terminal computer and the terminal identification information of the terminal computer with which wireless communication has been established, and acquires the acquired installation direction information , Terminal identification information, own identification information, and own AP installation direction information are notified to the operation control apparatus.

  The operation control device includes a step of identifying the car number of each terminal computer from the identification information of the wireless LAN access point notified from the wireless LAN access point.

  In the operation control device, from the installation direction information, terminal identification information, and AP installation direction information, the installation position of the terminal computer installed in the vehicle for each car number forming the train on which it is mounted The terminal location pattern data indicating the relationship between the radio wave intensity and the terminal location pattern data is referenced to identify the installation location of the terminal computer in the vehicle.

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

  (1) A position identification medium becomes unnecessary, and the installation work of the display device and the terminal computer can be made efficient.

  (2) It is possible to cause each computer to independently execute a display control operation corresponding to each installation position.

  (3) An erroneous display of information can be prevented.

It is explanatory drawing which shows an example of a structure of the distributed computer system for rail vehicles by one embodiment of this invention. It is explanatory drawing which shows the structure of the apparatus mounted in the vehicle in the distributed computer system for rail vehicles of FIG. 1, its connection, and the example of arrangement | positioning. It is a figure which shows the example of a display of the guidance screen which is displayed on the display terminal for information services which the distributed computer system for rail vehicles of FIG. It is a functional block diagram which shows the structural example of the terminal computer which the distributed computer system for rail vehicles of FIG. 1 has. It is a functional block diagram which shows the structural example of the wireless LAN access point which the distributed computer system for rail vehicles of FIG. 1 has. It is a functional block diagram which shows the structural example of the information service management apparatus which the distributed computer system for rail vehicles of FIG. 1 has. It is a sequence diagram which shows the flow of operation | movement until the terminal computer which the distributed computer system for rail vehicles of FIG. 1 has acquires an IP address. It is a sequence diagram which shows the flow of the operation | movement which the terminal computer which the distributed computer system for rail vehicles of FIG. 1 acquires an operation parameter, and performs display control of a display terminal. It is explanatory drawing which shows the structure of the organization data table with which the organization data storage part which the information service management apparatus of FIG. 6 has is provided, and a data example. It is explanatory drawing which shows the structure of the terminal arrangement pattern definition table with which the composition data storage part which the information service management apparatus of FIG. 6 has is provided, and a data example. It is explanatory drawing which shows the example of a data of the initial state of the PC management table produced | generated by the PC management data memory | storage part, when the PC management part which the information service management apparatus of FIG. 6 has received the train organization data from an information delivery center. . It is explanatory drawing which shows the example of data of the PC management table after a terminal computer is registered.

  In the following embodiments, when it is necessary for the sake of convenience, the description will be divided into a plurality of sections or embodiments. However, unless otherwise specified, they are not irrelevant to each other. There are some or all of the modifications, details, supplementary explanations, and the like.

  Further, in the following embodiments, when referring to the number of elements (including the number, numerical value, quantity, range, etc.), especially when clearly indicated and when clearly limited to a specific number in principle, etc. Except, it is not limited to the specific number, and may be more or less than the specific number.

  Further, in the following embodiments, the constituent elements (including element steps and the like) are not necessarily indispensable unless otherwise specified and apparently essential in principle. Needless to say.

  Similarly, in the following embodiments, when referring to the shape, positional relationship, etc. of components, etc., the shape of the component is substantially the case unless it is clearly specified and the case where it is clearly not apparent in principle. And the like are included. The same applies to the above numerical values and ranges.

  In all the drawings for explaining the embodiments, the same members are denoted by the same reference symbols in principle, and the repeated explanation thereof is omitted. In order to make the drawings easy to understand, even a plan view may be hatched.

<Summary of invention>
The first outline of the present invention includes a plurality of terminal computers (terminal computers 4), a wireless LAN access point (wireless LAN access point 3) installed in each vehicle, and an operation control device (information service management device 2). This is a distributed computer system for railway vehicles (distributed computer system 10).

  The plurality of terminal computers individually control the display contents of the plurality of display terminals installed in the vehicle that forms the train, and are installed in association with the plurality of display terminals. The operation control device distributes information to be displayed on the plurality of display terminals via the wireless LAN access point, and controls the operation of the plurality of terminal computers.

  Each terminal computer includes a first installation direction acquisition unit (installation direction acquisition unit 100), an operation parameter acquisition unit (operation parameter acquisition unit 44), and a display control unit (terminal display control unit 45).

  The first installation direction acquisition unit acquires the installation direction of its own terminal computer and outputs it as installation direction information. The operation parameter acquisition unit notifies the wireless LAN access point of the installation direction information acquired by the first installation direction acquisition unit and its own terminal identification information, and wirelessly receives an operation parameter that defines its own operation from the operation control device. Obtained via a LAN access point. The display control unit 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 includes a radio wave intensity measurement unit (radio wave intensity measurement unit 101), a second installation direction acquisition unit (installation direction acquisition unit 102), and a location information notification unit (DHCP server / information service management device communication unit 34). ).

  The radio wave intensity measuring unit measures the radio wave intensity from each terminal computer to receive and outputs the measurement result. The second installation direction acquisition unit acquires the installation direction of its own wireless LAN access point and outputs it as AP installation direction information.

  The position information notifying unit establishes wireless communication with the terminal computer, and the operation control device receives the radio field intensity measured by the radio field intensity measuring unit, AP installation direction information, own identification information, terminal identification information, and terminal computer installation direction information. Notify

  The operation control apparatus has a terminal computer management unit (PC management unit 24). The terminal computer management unit identifies the vehicle number of each terminal computer from the identification information of the wireless LAN access point notified from the wireless LAN access point, and the installation direction information of the terminal computer, the radio wave intensity notified from the wireless LAN access point , And by referring to the terminal arrangement pattern data indicating the relationship between the installation position of the terminal computer installed in the vehicle and the radio wave intensity from the AP installation direction information of the wireless LAN access point, the terminal computer in the vehicle of the terminal computer An installation position is specified, an operation parameter corresponding to each installation position is generated, and transmitted to the terminal computer via a wireless LAN access point.

  The second outline of the present invention is that the operation control method of the distributed computer system for railcars individually controls display contents of a plurality of display terminals (display terminals 40) installed in a vehicle that forms a train. A plurality of terminal computers (terminal computer 4) installed in association with a plurality of display terminals, a wireless LAN access point (wireless LAN access point 3) installed in each vehicle, and a wireless LAN access point This is an operation control method for a distributed computer system for railway vehicles that includes an operation control device (information service management device 2) that distributes information to be displayed on a plurality of display terminals and controls the operation of the plurality of terminal computers.

  This operation control method includes the following steps.

  The wireless LAN access point establishes wireless communication with the terminal computer installed in the vehicle, acquires the installation direction information of the terminal computer established with the wireless communication and the terminal identification information of the terminal computer, and acquires the acquired installation direction information , Terminal identification information, own identification information, and own AP installation direction information are notified to the operation control device (steps S420, S421, S322).

  The operation control device includes a step of identifying the car number of each terminal computer from the identification information of the wireless LAN access point notified from the wireless LAN access point (steps S221 and S222).

  The operation control device, based on the installation direction information, terminal identification information, and AP installation direction information, installs the terminal computer installed in the vehicle for each car number of the vehicle that forms the train on which it is mounted. The terminal location pattern data indicating the relationship between the radio frequency intensity and the radio wave intensity is referred to to specify the installation position of the terminal computer in the vehicle (steps S422, S423, and S424).

  Hereinafter, the embodiment will be described in detail based on the above-described outline.

<Configuration example of a distributed computer system for railway vehicles>
FIG. 1 is an explanatory diagram showing an example of the configuration of a distributed computer system for railway vehicles 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 equal to or greater than 1) from No. 1 car to No. n car, for example. ing.

  Further, in FIG. 1, a broken line frame represents a vehicle that forms a train, and each vehicle is provided with a wireless LAN access point 3 and a plurality of terminal computers 4, and communication between the two is wireless. Is done by.

  Each terminal computer 4 is formed integrally with the display terminal 40 shown in FIG. The display terminal 40 includes an LED display or a liquid crystal display. The terminal computer 4 is installed by being embedded in a wall surface such as an upper part of a door in the vehicle, for example. Here, the display terminal 40 and the terminal computer 4 are associated with each other on a one-to-one basis, and the display contents are individually controlled by the terminal computer 4.

  All these terminal computers 4 have the same function of displaying various screens for information services on a display terminal connected to the terminal computer 4. However, each terminal computer 4 manages information service in accordance with the installation position of the display terminal 40 connected to the terminal computer 4 so that the display contents can be changed according to the specification and installation position of the display terminal 40. Program control is performed so that various display control operations can be executed according to predetermined operation parameters distributed from the device 2.

  In this way, for example, different information is displayed on the right and left sides in the direction of travel of the vehicle, the guide map indicating the position of the staircase, elevator, etc. at the stop station is changed for each vehicle, or the advertisement is broadcast depending on the position in the vehicle Detailed display control, such as changing the image, becomes possible.

  The number of display terminals 40 installed in one vehicle, that is, the number of terminal computers 4 is arbitrary, but is usually between 2 (installed at both front and rear ends of the vehicle) and 24, and the same number. Some trains are organized only by vehicles on which display terminals 40 are installed, and some trains 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 terminal computers 4 of PC # 1-1 to PC # 1-8 are installed in the first car, and a total of 24 terminal computers 4 of PC # 2-1 to PC # 2-24 are installed in the second car. Has been. The title PC # j-k represents the k-th terminal computer 4 of the j-th car.

  As shown in FIG. 1, the distributed computer system 10 includes a DHCP (Dynamic Host Configuration Protocol) server 1, an information service management device 2, and a LAN (Local Area Network) 5.

  The DHCP server 1 assigns an IP address or the like necessary for IP (Internet Protocol) communication to each terminal computer 4. The information service management device 2 distributes each terminal computer 4 with operation parameters that define its operation and various types of information necessary for providing the information service.

  The LAN 5 is a network that connects the DHCP server 1, the information service management apparatus 2, and the wireless LAN access point 3, and is connected by, for example, Ethernet (registered trademark).

  As described above, the DHCP server 1, the information service management device 2, and the wireless LAN access point 3 provided in each vehicle are connected to each other via the LAN 5 so that they can communicate with each other, thereby including the wireless LAN including the terminal computer 4. A system is built.

  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 terminal computer 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 the information service 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 and its connection and arrangement example>
FIG. 2 is an explanatory diagram showing the configuration of the device mounted on the vehicle, its connection, and an arrangement example.

  In FIG. 2, the DHCP server 1 and the information service management device 2 are mounted on the vehicle 9 that is the first car. In addition, a total of eight display terminals 40 (FIG. 4) and a terminal computer 4 (PC # 1-1 to PC # 1-8) for controlling the display terminals 40 are installed in the vehicle 9 of the first car. An example in which a wireless LAN access point 3 is installed on the wall on the vehicle traveling direction side is shown.

  The four display terminals 40 (PC # 1-8 to PC # 1-5) are embedded and installed in the upper wall surface of each door provided on the right side in the vehicle traveling direction. The remaining four display terminals 40 (PC # 1-1 to PC # 1-4) are embedded and installed in the upper wall surface of each door provided on the left side in the vehicle traveling direction.

  Further, the wireless LAN access point 3 is installed at a substantially central portion of the wall on the vehicle traveling direction side. As a result, the distance to the wireless LAN access point 3 is almost the same for the display terminal 40 facing each other.

  For example, the distance from the wireless LAN access point 3 to the display terminal 40 (PC # 1-8) installed on the right side, and the display installed on the left side so as to face the display terminal 40 (PC # 1-8) The distance from the terminal 40 (PC # 1-1) to the wireless LAN access point 3 is almost the same.

  Similarly, the distance from the wireless LAN access point 3 to the right display terminal 40 (PC # 1-7 to PC # 1-5) and the left display terminal 40 (PC # 1) from the wireless LAN access point 3 are similarly described. The distances from -2 to PC # 1-4) are almost the same.

  As shown by the thick line in FIG. 2, each device including each terminal computer 4 and the information service management device 2 installed in the same train shares the original power supply and supplies power at almost the same timing. In this example, it is assumed that the power supply line 7 turns on / off the power at almost the same timing. When the two vehicles 9 are connected to each other, the power line 7 and the LAN 5 are also connected to each other.

  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.

<Overview of display control operations performed by the terminal computer>
Here, an outline of the display control operation performed by the terminal computer 4 will be described with reference to FIG.

  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 and right sides in the traveling direction of the vehicle.

  These are all examples of guidance screens that are displayed when a train approaches the next stop station. FIG. 3A is an example of a screen that is displayed on the display terminal 40 on the door opening side. 3 (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, the 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 configuration of the screen is determined on the left and right sides in the traveling direction of the vehicle. The displayed message, guide map, 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 terminal computer 4 that controls display control of each display terminal 40 switches 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. Program controlled to operate.

  Thereby, even if it is the same terminal computer 4, it becomes possible to switch 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 possible. It can be performed.

<Configuration and functions of terminal computer>
Next, the configuration and function of each terminal computer will be described.

  FIG. 4 is a functional block diagram illustrating a configuration example of the terminal computer 4. Each terminal computer 4 has the same configuration except for unique information such as a terminal computer identification name and a MAC (Media Access Control) address.

  As shown in FIG. 4, the terminal computer 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 of the processing units of the unit 47 and the installation direction acquisition unit 100, and the storage units of the operation parameter storage unit 48 and the display content storage unit 49.

  The power-on detection unit 41 detects that the terminal computer 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) installed in the terminal computer 4 from the wireless LAN card, and reads the read MAC address as an IP address acquisition unit 43. To 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 to instruct 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 installation direction information that is information indicating the installation direction output from the installation direction acquisition unit 100 and the IP address delivered from the IP address acquisition unit 43. The wireless LAN transmission / reception unit 46 is instructed to acquire parameters. Further, the operation parameter acquisition unit 44 stores the operation parameter delivered from the wireless LAN transmission / reception unit 46 in the operation parameter storage unit 48.

  The installation direction acquisition unit 100 acquires the installation direction of the terminal computer from data corresponding to an azimuth magnet such as an electronic compass, and outputs it as installation direction information. 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 the display schedule, addition, and update display content transmitted from the information service management apparatus 2 via the wireless LAN transmission / reception unit 46, and stores the received display schedule and display content as display content. Store in the unit 49.

  The wireless LAN transceiver 46 communicates wirelessly with the wireless LAN access point 3 via a wireless LAN card (not shown) and an omnidirectional antenna (not shown), so that the terminal computer 4, the DHCP server 1, and the information service management device 2 A wireless communication link is established with the information service management apparatus 2 and various data are transmitted and received by IP communication.

<Configuration and function of wireless LAN access point>
Next, the configuration and function of the wireless LAN access point will be described.

  FIG. 5 is a functional block diagram showing a configuration example of the wireless LAN access point 3.

  As shown in FIG. 5, the wireless LAN access point 3 includes a PC communication unit 32, a DHCP server / information service management device communication unit 34, a radio wave intensity measurement unit 101, and an installation direction acquisition unit 102.

  The PC communication unit 32 delivers the IP address request received from the terminal computer 4, the radio wave intensity measured by the radio wave intensity measuring unit 101, and the parameter request including the installation direction information to the DHCP server / information service management device communication unit 34.

  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 terminal computer 4.

  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 received parameter request 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 radio wave intensity measuring unit 101 measures the radio wave intensity from each terminal computer 4 received by the wireless LAN access point 3 and outputs the measurement result. As shown in FIG. 2, the wireless LAN access point 3 is installed at a substantially central portion of the wall on the vehicle traveling direction side, so if the terminal computer 4 is close to the wireless LAN access point 3. If the terminal computer 4 is far away from the wireless LAN access point 3, the radio wave intensity (dBm) becomes weak, and the radio wave intensity (dBm) becomes weak.

  For example, in the case of FIG. 2, the terminal computer 4 (PC # 1-8) and the terminal computer 4 (PC # 1-1) are installed so as to face symmetrically. The distance is almost the same. Therefore, the radio wave intensity of the terminal computer 4 (PC # 1-8) and the terminal computer 4 (PC # 1-1) is measured by the radio wave intensity measuring unit 101 as almost the same radio wave intensity.

  When the terminal computer 4 (PC # 1-8) and the terminal computer 4 (PC # 1-1) are installed at different positions, the radio field intensity measuring unit 101 measures the radio field intensity with different values. Become.

  For example, when the terminal computer 4 (PC # 1-8) is installed closer to the traveling direction side of the vehicle than the terminal computer 4 (PC # 1-1), that is, closer to the wireless LAN access point 3, the terminal computer The radio field intensity from 4 (PC # 1-8) is measured stronger than the radio field intensity from the terminal computer 4 (PC # 1-1).

  Similar to the installation direction acquisition unit 100 of FIG. 4, the installation direction acquisition unit 102 acquires the installation direction of the wireless LAN access point 3 from data equivalent to an azimuth magnet such as an electronic compass, and AP (access point) installation direction. Information is output to the DHCP server / information service management device communication unit 34 as information.

  The installation direction acquisition unit 102 detects in which direction the wall on the traveling direction side of the vehicle 9 to which the wireless LAN access point 3 is attached is directed. For example, when the wall on the traveling direction side of the vehicle 9 to which the wireless LAN access point 3 is attached is the east side, the AP installation direction information output from the installation direction acquisition unit 102 is output as “east”. .

<Configuration and function of information service management device>
Next, the configuration and function of the information service management apparatus will be described with reference to FIG.

  FIG. 6 is a functional block diagram illustrating a configuration example of the information service management apparatus.

  As shown in FIG. 6, the information service management apparatus 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. Unit 26, composition data update unit 27, and information distribution center communication unit 29, and PC management data storage unit 82, composition data storage unit 81, and distribution content storage unit 83.

  The power-on detection unit 21 detects that the information service management apparatus 2 has been turned on, and activates the operation parameter group generation unit 23. The operation parameter group generation unit 23 generates an operation parameter group to be distributed to each terminal computer 4 installed in the own train based on the train data of the own train and the terminal arrangement pattern, and the PC management data storage unit 82. The initial setting of the PC management table 821 stored in is performed.

  The train data of the own train is data stored in the train data table 811 of the train data storage unit 81, and the terminal layout pattern is stored in the terminal layout pattern definition table 831 of FIG.

  Details of the composition data table 811, terminal arrangement pattern definition table 831, and PC management table 821 will be described later with reference to FIGS. 9, 10, and 11.

  The wired LAN transmission / reception unit 22 communicates with the wireless LAN access point 3 via the LAN 5 (FIG. 1) to transmit / receive various data by IP communication with the terminal computer. The IP address of the information service management device 2 is assigned a fixed IP address in advance, and the IP address of each wireless LAN access point 3 is, for example, as part of train organization data, the information distribution center 70 ( It shall be notified from FIG.

  The PC management unit 24 receives parameter requests transmitted from each terminal computer 4 via the wired LAN transmission / reception unit 22. Then, the PC management table 821 is searched based on the installation direction information and the reception intensity information included in the received parameter request, the installation position of the terminal is specified, and the corresponding operation parameter is returned from the installation position to the terminal computer. . Further, the identification name, MAC address, and IP address of the terminal computer 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 the distribution content to each terminal computer 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 terminal computers 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 terminal computers 4 that display the news. If the distribution destination is specified as the distribution destination, the content is transmitted only to the corresponding terminal computer 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 then sends it to each terminal computer to the PC management unit 24. Request to send display control information to give instructions such as station 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 terminal computers 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. 7 is a sequence diagram showing an operation flow until each terminal computer 4 acquires an IP address necessary for IP communication. FIG. 8 is a sequence diagram showing an operation flow in which each terminal computer 4 that has acquired an IP address acquires an operation parameter from the information service management apparatus and performs display control of the display terminal 40.

  In FIG. 7, the operation sequences in the terminal computer 4, the wireless LAN access point 3, the information service management device 2, and the DHCP server 1 are shown from left to right.

  Further, in FIG. 8, from left to right, operation sequences in the display terminal 40, the terminal computer 4, the wireless LAN access point 3, and the information service management device 2 are shown.

  The details of the operation until each terminal computer acquires an IP address from the DHCP server will be described below with reference to the sequence diagram of FIG. In addition, an operation of performing display control by acquiring an operation parameter defining its own operation from the information service management apparatus using the acquired IP address will be described with reference to the sequence diagram of FIG.

  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 terminal computer 4 detects the power-on of its own device (step S411), and the MAC The address acquisition unit 42 is activated.

  Subsequently, the MAC address acquisition unit 42 acquires the MAC address by reading the MAC address, which is the 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). Similarly, the wireless LAN access point 3 that is turned on transmits a beacon signal notifying information necessary for wireless communication such as its own MAC address in a predetermined cycle (step S312).

  When the wireless LAN transmission / reception unit 46 of the terminal computer 4 detects this beacon signal (step S413), it notifies its own MAC address and authentication information in order to establish a communication link with the wireless LAN access point 3. An association request is transmitted (step S414).

  When the association request is received by the wireless LAN access point 3 and necessary client authentication is performed (step S313), if the connection is permitted, the wireless LAN access point 3 specifies the MAC address of the terminal computer 4. As a result, the connection permission is notified to the terminal computer 4. At this time, an association response for notifying a communication parameter when performing wireless communication is transmitted.

  When the association between the terminal computer 4 and the wireless LAN access point 3 is established, next, the IP address acquisition unit 43 of the terminal computer 4 uses a broadcast signal for notifying that it wants to acquire an IP address and its own MAC address. A certain DHCP DISCOVER is transmitted to the wireless LAN access point 3 (step S416).

  The DHCP server 1 that has received this broadcast signal relayed by the wireless LAN access point 3 selects one assignable IP address candidate (step S111), and designates the MAC address of the terminal computer 4 by: A DHCP OFFER that is a signal for notifying the terminal computer 4 of the IP address candidate is transmitted.

  The IP address acquisition unit 43 of the terminal computer 4 accepts the IP address candidate notified by the DHCP OFFER received via the wireless LAN transmission / reception unit 46 (step S417). Then, a DHCP REQUEST that is a signal notifying that the IP address candidate is to be used is transmitted to the DHCP server 1.

  The DHCP server 1 that has received this signal relayed by the wireless LAN access point 3 performs the lending process of the IP address notified as the IP address candidate (step S112). Then, DHCP ACK, which is a signal notifying that the lending has been completed, is transmitted to the terminal computer 4.

  The IP address acquisition unit 43 of the terminal computer 4 that has received this DHCP ACK 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 of 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 terminal computer 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 terminal computer 4 acquires the installation direction information of the terminal computer 4 from the installation direction acquisition unit 100 (step S420). The installation direction acquisition unit 100 includes an electronic compass as described above. The electronic compass detects weak geomagnetism with a magnetic sensor, converts the direction into data, and outputs the data.

  The installation direction acquisition unit 100 detects in which direction the display screen of the display terminal 40 is directed, for example. For example, when the display terminal 40 is installed in “north” and the display screen of the display terminal 40 is installed in the “south” direction, the installation direction information output from the installation direction acquisition unit 100 is “south” "Is output.

  Subsequently, the operation parameter acquisition unit 44 transmits to the wireless LAN access point 3 a parameter request including the identification name of the terminal computer 4, which is its own unique information, and installation direction 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 the wireless LAN access point 3.

  The wireless LAN access point 3 receives the IP packetized parameter request via the PC communication unit 32, the radio wave intensity measured by the radio wave intensity measurement unit 101, and the AP installation direction information acquired by the installation direction acquisition unit 102 Is added to the parameter request and transmitted to the information service management apparatus 2 via the DHCP server / information service management apparatus 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 PC management unit 24 refers to the composition data table 811 and transmits the received IP packet to the wireless LAN access. From the MAC address of the point 3, the vehicle number of the vehicle in which the wireless LAN access point 3 and the terminal computer 4 are installed is specified.

  Subsequently, it is determined at which position in the vehicle the terminal computer 4 is installed. The installation position is specified from the installation direction information of the terminal computer 4 and the information of the radio wave intensity and the installation direction information of the wireless LAN access point 3.

  The terminal installation pattern is obtained from the composition data table 811. For example, as shown in FIG. 2, four terminal computers 4 on the right side in the traveling direction, four terminal computers 4 on the left side in the traveling direction, and the wireless LAN access point 3 Get information about where is installed.

  Here, in the installation example shown in FIG. 2, when the terminal computer 4 and the wireless LAN access point 3 perform wireless communication, the terminal computer 4 having the strongest radio wave intensity, that is, the highest receiving sensitivity, receives the wireless LAN access point 3. Terminal computer 4 (PC # 1-8, PC # 1-1) with the shortest distance.

  Furthermore, in order to specify whether the two installation positions are the right side or the left side of the traveling direction, the installation direction information is obtained from the terminal computer 4 (PC # 1-8, PC # 1-1).

  For example, if the terminal computer 4 (PC # 1-1) is installed in the north direction and the terminal computer 4 (PC # 1-8) is installed in the south direction, the radio field intensity is substantially the same from the obtained terminal installation pattern. It can be seen that the terminal computers 4 arranged at substantially the same distance from the wireless LAN access point 3 are installed so as to face each other.

  Further, it can be determined from the installation direction information of the wireless LAN access point 3 whether the terminal computer 4 installed to face each other is installed on the right side or the left side in the traveling direction of the vehicle.

  By repeating this operation, the installation positions of all the terminal computers 4 are specified. Then, the identification name of the terminal computer 4 notified from the terminal computer 4 in the record of the PC management table 821 corresponding to the specified installation position, the MAC address of the terminal computer 4 included in the received IP packet, and the IP An address is registered (step S221).

  Subsequently, the PC management unit 24 acquires a pointer value corresponding to the record from the PC management table 821, and transmits the acquired pointer value as an operation parameter to the terminal computer 4 (S222).

  FIG. 9 shows a configuration of the knitting data table 811 provided in the knitting data storage unit 81 and data examples.

  As shown in FIG. 9, in the knitting data table 811, records corresponding to the respective vehicles that are knitting the train are registered in order of car number. 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 terminal computers 4 installed in the vehicle (= the number of display terminals 40).

  The access point attribute data is attribute data of the wireless LAN access point 3 installed in the vehicle, and includes an identification number, a wireless communication channel number, a MAC address, and an IP address of the wireless LAN access point 3. 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 case of the data example shown in FIG. 9, eight terminal computers 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 Indicates that one wireless LAN access point 3 with “0x --- abf0” and IP address “192.168.1.11” is installed.

  In addition, it is shown that 24 terminal computers 4 are installed by pattern B in the second car, and that four terminal computers 4 are installed by pattern C in the third car.

  FIG. 10 shows a configuration of the terminal arrangement pattern definition table 831 provided in the composition data storage unit 81 and a data example.

  In the terminal arrangement pattern definition table 831, as shown in FIG. 10, records corresponding to the respective patterns for arranging the display terminals 40 on the vehicle are registered. Each record has an arrangement pattern, reception sensitivity, installation direction, and PC installation position as attributes.

  The arrangement pattern is an identification name of the arrangement pattern of the place where the display terminal 40 is installed on the vehicle as in FIG. The reception sensitivity is the reception sensitivity of the radio wave received from the terminal computer 4 by the wireless LAN access point 3, and indicates the radio wave intensity and the like. The installation direction indicates whether the terminal computer 4 is installed on the right side or the left side of the vehicle traveling direction. The PC installation position is a number indicating the installation position of the terminal computer 4 in the vehicle.

  In the case of the data example of FIG. 10, when the arrangement pattern is pattern A, it indicates that there are four terminal computers 4. Then, the terminal computer 4 with the installation location 1 as the PC installation location indicates that the installation direction is on the right side and the radio field intensity is high, that is, the reception sensitivity is high. Further, the terminal computer 4 with the installation location 2 has the installation direction on the left side, indicating that the reception sensitivity is high.

  Similarly, the terminal computer 4 with the installation location 3 has the installation direction on the right side and the radio wave intensity is weak, that is, the reception sensitivity is low, and the terminal computer 4 with the installation location 4 has the installation direction on the left side and the reception sensitivity. Indicates that they are small.

  FIG. 11 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. 11, in the PC management table 821 in the initial state, records corresponding to the respective terminal computers 4 installed in the vehicles that form the train are registered in the order of the car number and the PC installation position number. . Each record has a car number, a PC installation position, and a pointer value as attributes.

  The car number is the car number of the vehicle in which the terminal computer 4 is installed. The PC installation position is a number indicating the installation position of the terminal computer 4 in the vehicle as in FIG. In addition, a pointer value indicating an address of a list of operation parameters to be distributed to the terminal computer 4 is registered as the pointer value.

  Here, for example, the notation p (A, 1) in FIG. 11 represents a pointer value to the list of the first operation parameter to be distributed to the terminal computer 4 whose arrangement pattern is “pattern A”. Yes.

  Train formation data received from the information distribution center 70 is registered in the formation data table 811 of FIG. 9 by the formation data update unit 27. The PC management unit 24 refers to the registered knitting data table 811 and the terminal arrangement pattern definition table 831 in FIG. 10, and the operation to be distributed to each terminal computer 4 corresponding to each installation position of each vehicle. Identify the parameters. Then, the pointer value to the specified list of operation parameters is registered in the PC management table 821.

  In step S221 in FIG. 8, a record corresponding to the terminal computer 4 that has transmitted the parameter request is retrieved from the PC management table 821, and the identification name of the terminal computer 4 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 terminal computer 4.

  By repeating such an operation for each terminal computer 4 that has transmitted the parameter request, as shown in FIG. 12, each record in the PC management table 821 after PC registration corresponds to that record. The identification name, MAC address, and IP address of the terminal computer 4 to be added are additionally registered.

  Returning to FIG. 8 again, the description will be continued. When the operation parameter acquisition unit 44 of the terminal computer 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.

  The terminal display control unit 45 refers to the operation parameter stored in the operation parameter storage unit 48 to control its own operation, thereby acquiring a necessary display schedule and content from the display content storage unit 49 and displaying the display terminal 40. Initial display data to be displayed 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 instructing to send a telop for next station guidance.

  Upon receiving the request, the PC management unit 24 displays the composition data table 811 (FIG. 9), the terminal arrangement pattern definition table 831 (FIG. 10), the PC management table 821 (FIG. 12), and the operation parameter list (FIG. 11). refer.

  Then, the target terminal computer 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 terminal computers 4 (step S223). Thereby, for example, distribution of unnecessary display control information to the terminal computer 4 corresponding to the display terminal 40 that does not perform telop display is suppressed.

  The terminal display control unit 45 of the terminal computer 4 that has received this display control information responds to the received display control information by controlling its own operation with reference to the operation parameters stored in the operation parameter storage unit 48. The displayed data is updated (step S423). Thereby, for example, display data P2 of the next station guidance telop is generated and transmitted to the display terminal 40.

  Thereafter, similarly, display control information is transmitted from the information service management device 2 to the terminal computer 4 based on the new operation management data (step S224), and the display control information received by the terminal computer 4 is supported. By updating the display data (step S424), the display data P3 is generated and transmitted to the display terminal 40.

  For example, the 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 on each terminal computer that requires the information. 4 is appropriately distributed as updated content.

  The display content update unit 47 of each terminal computer 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.

  As described above, according to the distributed computer system according to the present embodiment, it is not necessary to install a position identification medium that records the installation position in the vehicle.

  In addition, since the work for installing the position identification medium is not required, the number of work steps can be reduced, and erroneous display of information due to an incorrect installation of the position identification medium can be prevented.

  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. Needless to say.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, 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 the 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.

DESCRIPTION OF SYMBOLS 1 DHCP server 2 Information service management apparatus 3 Wireless LAN access point 4 Terminal computer 6 Power supply 7 Power line 9 Vehicle 10 Distributed computer system 21 Power-on detection part 22 Wired LAN transmission / reception part 23 Operation parameter group generation part 24 PC management part 25 Display Content distribution control unit 26 Display control information distribution control unit 27 Composition data update unit 29 Information distribution center communication unit 32 PC communication unit 34 DHCP server / information service management device communication unit 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 operation guide display unit 62a telop display unit 63a home guide map display unit 64 a vehicle position display unit 65a name 66a car number 67a direction 70 information distribution center 81 composition data storage unit 82 PC management data storage unit 83 distribution content storage unit 100 installation direction acquisition unit 101 radio wave intensity measurement unit 102 installation direction acquisition unit 811 composition data Table 821 PC management table 831 Terminal arrangement pattern definition table

Claims (8)

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;
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;
Have
Each said terminal computer is
A first installation direction acquisition unit that acquires the installation direction of its own terminal computer and outputs it as installation direction information;
The wireless LAN access point is notified of the installation direction information acquired by the first installation direction acquisition unit and its own terminal identification information, and an operation parameter defining its operation is transmitted from the operation control device to the wireless LAN. An operation parameter acquisition unit to acquire via an 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;
Have
The wireless LAN access point is
A radio field intensity measuring unit that measures the radio field intensity from each of the terminal computers to receive and outputs the measurement results;
A second installation direction acquisition unit that acquires the installation direction of its own wireless LAN access point and outputs it as AP installation direction information;
Establishing wireless communication with the terminal computer, the radio wave intensity measured by the radio wave intensity measuring unit, the AP installation direction information, its own identification information, the terminal identification information, and the installation direction information of the terminal computer A location information notification unit for notifying to,
Have
The operation control device identifies a vehicle number of each terminal computer from the identification information of the wireless LAN access point notified from the wireless LAN access point, and installs the terminal computer notified from the wireless LAN access point By referring to terminal arrangement pattern data indicating the relationship between the installation position of the terminal computer installed in the vehicle and the radio wave intensity from the direction information, the radio wave intensity, and the AP installation direction information of the wireless LAN access point A terminal computer management unit that identifies an installation position of the terminal computer in the vehicle, generates the operation parameter corresponding to each installation position, and transmits the operation parameter to the terminal computer via the wireless LAN access point; A distributed computer system for railway vehicles. In the distributed computer system for railway vehicles according to claim 1,
The operation control device further includes, for each car number of a vehicle that forms a train on which it is mounted, identification information of the wireless LAN access point installed in the vehicle, and the terminal arrangement pattern data. A distributed computer system for a railway vehicle having a knitting data storage unit for storing. In the distributed computer system for railway vehicles according to claim 1,
The distributed computer system for railway vehicles, wherein the installation direction information acquired by the first installation direction acquisition unit and the AP installation direction information acquired by the second installation direction acquisition unit are directions. In the distributed computer system for railway vehicles according to claim 3,
The first and second installation direction acquisition units are electronic compasses, and are a distributed computer system for railway vehicles. In the distributed computer system for railway vehicles according to claim 1,
The operation control device further selects information to be 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 A distributed computer system for railway vehicles having a control unit. The display contents of a plurality of display terminals installed in a vehicle forming a train are individually controlled, a plurality of terminal computers installed in association with the plurality of display terminals, and a wireless LAN installed in each vehicle A distributed computer system for railway vehicles, comprising: an access point; and 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. The operation control method of
The wireless LAN access point establishes wireless communication with the terminal computer installed in the vehicle, acquires the installation direction information of the terminal computer and the terminal identification information of the terminal computer with which wireless communication is established, and acquires Notifying the operation control device of the installation direction information, the terminal identification information, its own identification information, and its own AP installation direction information;
In the operation control device, specifying the car number of each terminal computer from the identification information of the wireless LAN access point notified from the wireless LAN access point;
In the operation control device, the installation direction information, the terminal identification information, and the AP installation direction information are installed in the vehicle for each car number of a vehicle that forms a train on which the vehicle is mounted. Identifying the installation position of the terminal computer in the vehicle by referring to terminal arrangement pattern data indicating the relationship between the installation position of the terminal computer and the radio wave intensity;
A method for controlling the operation of a distributed computer system for railway vehicles. In the operation control method of the distributed computer system for railway vehicles according to claim 6,
Further, in the operation control device, an operation parameter that defines the operation of the terminal computer corresponding to each installation position in the terminal computer that specified the installation position in the vehicle is generated, and the operation parameter is determined via the wireless LAN access point. Sending 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 display content of the display terminal by operating according to parameters;
A method for controlling the operation of a distributed computer system for railway vehicles. In the operation control method of the distributed computer system for rail vehicles according to claim 7,
Further, in the operation control device, based on the operation parameter transmitted to each of the terminal computers, selecting information displayed on a display terminal associated with the terminal computer and distributing the information to the terminal computer A method for controlling the operation of a distributed computer system for railway vehicles.

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