WO2013072987A1

WO2013072987A1 - Data transmission system and data transmission method

Info

Publication number: WO2013072987A1
Application number: PCT/JP2011/076197
Authority: WO
Inventors: 鶴本　伸一; 健一石栗
Original assignee: 三菱電機株式会社
Priority date: 2011-11-14
Filing date: 2011-11-14
Publication date: 2013-05-23

Abstract

Disclosed is a data transmission system in which transmission of data is performed between a terrestrial end and a vehicle end, comprising: individual wiring devices (41 to 45) arranged at the terrestrial end that hold device table information expressing data of transmission subjects to be transmitted to vehicles (51 to 55); and vehicles (51 to 55) that, on entry of the aforementioned individual wiring devices (41 to 45) into a communication area, transmit to these individual wiring devices (41 to 45) vehicle table information expressing the data of the transmission subjects to be transmitted to the aforementioned individual wiring devices (41 to 45). Based on the aforementioned device table information and the aforementioned vehicle table information, the individual wiring devices (41 to 45) determine the transmission sequence of transmission of data between themselves and the aforementioned vehicles (51 to 55) in order of the priority conferred on the items of data that are the subject of transmission. The aforementioned vehicles (51 to 55) and the aforementioned individual wiring devices (41 to 45) perform transmission of data in accordance with the aforementioned transmission sequence.

Description

Data transmission system and data transmission method

The present invention relates to a data transmission system for transmitting data between a train side and a ground side.

Conventionally, when data is transmitted between a train and a transmission / reception device on the ground, data transmission is not always possible, and transmission opportunities are limited depending on the position of the train and the like. Therefore, in Patent Document 1 below, when there are a plurality of contents as data to be distributed from the ground side, a technique is disclosed in which priority is given to the contents and distribution is performed from the highest priority. As a result, high-priority content can be efficiently distributed to the train.

JP 2004-135138 A

However, according to the above conventional technology, only content distributed from the ground side is targeted. Therefore, when data with high priority is transmitted from the train to the ground side, there is a problem in that it cannot be transmitted with priority over the content distributed from the ground side.

The present invention has been made in view of the above, and an object thereof is to obtain a data transmission system capable of efficiently transmitting data transmitted from both the ground side and the train side.

In order to solve the above-described problems and achieve the object, the present invention is a data transmission system that transmits data between the ground side and the vehicle side, and is installed on the ground side and transmits to the vehicle side. An individual distribution device holding device table information representing target data, and vehicle table information representing data to be transmitted to the individual distribution device when entering the communication area of the individual distribution device to the individual distribution device The individual delivery device is based on the device table information and the vehicle table information, and the individual delivery device is arranged between the vehicle and itself in descending order of priority given to each data to be transmitted. The transmission order in which data is transmitted is determined, and the vehicle and the individual distribution device transmit data according to the transmission order.

The data transmission system according to the present invention has an effect that data transmitted from both the ground side and the train side can be efficiently transmitted.

FIG. 1 is a diagram illustrating a configuration example of a data transmission system. FIG. 2 is a diagram illustrating that data transmission opportunities between the individual distribution device and the vehicle are limited. FIG. 3 is a flowchart showing the data transmission process. FIG. 4 is a diagram illustrating a process of transmitting only the difference content between the ground side and the train side.

Hereinafter, embodiments of a data transmission system according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration example of a data transmission system according to the present embodiment. The data transmission system includes an editing device 10, a content database (DB) 20, a distribution server 30, individual distribution devices 41 to 45, and vehicles 51 to 55. Devices other than the vehicles 51 to 55 are devices installed on the ground side.

The editing device 10 edits data of distribution contents transmitted from the ground side to the vehicle upper side (vehicles 51 to 55). Here, as the content data to be transmitted specifically to the vehicles 51 to 55, the on-board software for improving the software malfunction of the devices and the like mounted on the trains 51 to 55, the trains 51 to 55 are on the route. On-board destination content, which is display information such as destination information when traveling and information on a station where the vehicle stops, on-vehicle news content and a vehicle for display on a display device for passengers installed in each train 51-55 Assume top advertising content. The editing device 10 stores the distribution content data in a prescribed location of the content DB 20.

The content DB 20 is a storage unit that stores distribution content data distributed to the vehicles 51 to 55. Further, on-vehicle information data to be described later, which is data from the vehicles 51 to 55 to the ground side, is also stored.

The distribution server 30 confirms the data of the distribution content stored in the content DB 20 according to the specified regular schedule, specifically the creation date and time of each content and the like, and the data such as the content updated since the previous confirmation In some cases, the updated data is read from the content DB 20 and distributed to the individual distribution devices 41 to 45 designated as distribution destinations. In addition, when the distribution server 30 acquires on-board information data from each of the individual distribution devices 41 to 45, the distribution server 30 stores the on-board information data in a specified location of the content DB 20.

The individual distribution devices 41 to 45 distribute the distribution content data distributed from the distribution server 30 to vehicles (train formation) corresponding to each one-to-one. Specifically, for the individual distribution devices 41 to 45, when the train operating company is operating a plurality of routes, one individual distribution device is prepared for each route. And the corresponding individual delivery apparatus delivers the data of delivery content with respect to the train organization (a plurality may be sufficient) which drive | works the route. In general, the passenger class is often different depending on the route, such as commuting, attending school, vacation, etc., so that advertisements and local news suitable for passengers using each route are scheduled and displayed in the vehicle. In addition, although the case where a plurality of individual distribution devices are provided has been described, the present invention is not limited to this, and the number of individual distribution devices may be one as long as the number of operating routes is one. In addition, for example, a plurality of devices corresponding to the individual distribution device 41 may be provided in one route. It can be distributed at a plurality of locations within the same route. In addition, when the individual distribution devices 41 to 45 receive the on-board information data from the vehicles 51 to 55 respectively corresponding to the one-to-one correspondence, the individual distribution devices 41 to 45 transmit the received on-board information data to the distribution server 30.

Vehicles 51-55 are train formations to which distribution content data is distributed from corresponding individual distribution devices 41-45. Each of the vehicles 51 to 55 has a display device capable of reproducing each content. In FIG. 1, one vehicle is associated with each individual distribution device, but as described above, each vehicle shows a train organization that travels on different routes. Therefore, in practice, the corresponding individual distribution device distributes the data of the distribution content to all train formations traveling on each route. Each of the vehicles 51 to 55 collects on-vehicle failure information indicating its own failure state and on-vehicle display result data indicating the display results of each content, and the individual distribution devices corresponding to these data as on-vehicle information data Send to 41-45.

Here, the data flow of the distribution content shown in FIG. 1 will be described. The editing device 10 stores the distribution content data in the content DB 20. The distribution server 30 periodically checks the content DB 20, and when there is data of the distribution content updated since the previous confirmation, reads it from the content DB 20 and distributes it to the individual distribution devices 41 to 45. The individual distribution devices 41 to 45 transmit the distribution content data to the target vehicles 51 to 55.

Next, the flow of on-vehicle information data shown in FIG. 1 will be described. The vehicles 51 to 55 transmit the vehicle information data to the target individual distribution devices 41 to 45, and the individual distribution devices 41 to 45 transmit the received vehicle information data to the distribution server 30. The distribution server 30 stores the received on-vehicle information data in the content DB 20. Then, the editing device 10 periodically checks the content DB 20 and reads the vehicle information data. Here, when on-vehicle failure information is included in the on-vehicle information, the distribution server 30 stores the on-vehicle information data in the content DB 20 and also notifies the editing device 10 that there is on-vehicle failure information. Is possible. In this case, the editing device 10 can read out vehicle failure information that requires real-time performance in accordance with a notification from the distribution server 30. The distribution server 30 is not limited to the on-vehicle failure information, and can notify the editing device 10 of other information that requires real-time performance. Similarly, the editing device 10 can read other information that requires real-time performance in accordance with the notification.

Next, the data transmission opportunities between the ground side and the train side will be explained. As described above, each data constituting distribution contents to be distributed from the ground side (editing device 10) to the train side (vehicles 51 to 55) and from the train side (vehicles 51 to 55) to the ground side (editing device 10). There are a plurality of pieces of data constituting the on-vehicle information to be transmitted, and there is data with a large capacity. On the other hand, data transmission between the individual distribution devices 41 to 45 and the vehicles 51 to 55 is not always possible, and is limited by the positions of the vehicles 51 to 55 and the like.

FIG. 2 is a diagram showing that data transmission opportunities between the individual distribution device and the vehicle are limited. As an example, FIG. 1 shows a case where data is transmitted between the distribution server 30, the individual distribution device 41, and the vehicle 51. The same applies to the case where the other individual distribution devices 42 to 45 and the corresponding vehicles 52 to 55 are used. The distribution server 30 and the individual distribution device 41 are installed on the ground side, and the individual distribution device 41 and the distribution server 30 installed at the station base are connected by a ground network system such as a wide area network. The train (vehicle 51) that is actually running can transmit data to and from the individual distribution device 41 only within the transmission / reception range from the antenna 61 connected to the individual distribution device 41. Examples of a method in which the individual distribution device 41 and the vehicle 51 communicate with each other via the antenna 61 include a wireless LAN and a millimeter wave, but other methods may be used. Thus, the period during which data can be transmitted between the individual distribution device 41 and the vehicle 51 is limited when the vehicle 51 approaches the station base or is stopped.

Therefore, when the amount of data transmitted between the individual distribution device 41 and the vehicle 51 is small, all data is transmitted in one transmission opportunity. On the other hand, when there is a large amount of data to be transmitted between the individual distribution device 41 and the vehicle 51 and all data cannot be transmitted in one transmission opportunity, data is transmitted in order from the data with the highest priority.

Here, in the present embodiment, the priority of each data is set in the descending order of (1) on-vehicle failure information, (2) on-vehicle software, (3) on-vehicle destination content, (4) on-vehicle news content, ( 5) On-vehicle advertisement content, (6) On-vehicle display performance data, and priority is given to each data for all data included in the distribution content and on-vehicle information. For example, when it is necessary to transmit on-vehicle failure information from the vehicle 51 to the individual delivery device 41, this is transmitted with the highest priority. Then, on the next transmission opportunity, data is transmitted from the individual distribution device 41 to the vehicle 51 in the order of on-board software, on-board destination content,. Here, the individual distribution device 41 determines the order of transmitting data according to the priority.

The transmission process will be described based on a flowchart. FIG. 3 is a flowchart showing data transmission processing in the data transmission system. First, when the vehicle 51 enters the communication area of the antenna 61 connected to the individual distribution device 41, the vehicle 51 has presence or absence of vehicle information to be transmitted to the individual distribution device 41, specifically, vehicle failure information to be transmitted. And the table information (vehicle table information) which shows the presence or absence of display data on a vehicle is transmitted to the separate delivery apparatus 41 (step S1).

Next, in the individual distribution device 41, a table indicating presence / absence of distribution content to be transmitted to the vehicle 51, specifically, presence / absence of on-board software, on-vehicle destination content, on-vehicle news content, and on-vehicle advertisement content to be transmitted. The information (device table information) is held, and based on the vehicle table information acquired from the vehicle 51 and its own device table information, the data transmission order is determined in descending order of priority given to each data ( Step S2). For example, when there is on-vehicle failure information to be transmitted from the vehicle 51 to the individual distribution device 41, the individual distribution device 41 first determines to transmit the on-vehicle failure information from the vehicle 51 to the individual distribution device 41. The individual distribution device 41 notifies the vehicle 51 of the determined transmission order.

Then, the individual distribution device 41 and the vehicle 51 perform data transmission in accordance with the determined transmission order (step S3). As described above, the data transmitted from the individual distribution device 41 and the vehicle 51 can be transmitted in order from the one having higher priority data, so that the data can be transmitted efficiently.

In addition, each data shown in the distribution content and the on-board information is an example, and other data can be added or deleted. Moreover, the above-mentioned priority is an example, and the priority can be freely changed by setting it separately in the individual distribution device 41. Thereby, the optimal transmission order can be set according to the customer's request, system configuration, and the like.

In addition, each table information indicates the presence or absence of data, but is not limited to this. For example, the information indicated by each table information may be information indicating the update / acquisition time of each data, and data having a date and time newer than the previous transmission opportunity may be handled as a transmission target. In this case, for example, the individual distribution device 41 that has received the on-board table information specifies data to be transmitted from the vehicle 51.

Also, based on FIG. 2, the individual distribution device 41 and the vehicle 51 have been described as an example, but the present invention can also be applied to data transmission between the other individual distribution devices 42 to 45 and the corresponding vehicles 52 to 55. is there.

As described above, in the present embodiment, data transmitted from the individual distribution device on the ground side to the vehicle, and data transmitted from the vehicle to the individual distribution device on the ground side are set for each of all the data. A priority is given to the data, and the data with the corresponding priority is transmitted in order from the one having the higher priority data. Thereby, between an individual delivery apparatus and a vehicle, data transmission can be efficiently performed in order of high priority, without biasing to data transmission from one side.

Embodiment 2. FIG.
In the first embodiment, when data transmission is performed between the individual distribution device and the vehicle, priority is given to all data transmitted from both, and the transmission order is determined based on this priority. In the present embodiment, the transmission order of data transmission between the distribution server and the individual distribution device will be described. A different part from Embodiment 1 is demonstrated.

As shown in FIG. 2, the data transmission between the distribution server 30 and the individual distribution device 41 is different from the data transmission between the individual distribution device 41 and the vehicle 51 and can be always connected via the ground network system. is there. Also, the timing at which the distribution server 30 confirms the content DB 20 and transmits the data of the distribution content and the timing at which the individual transmission device 41 transmits the on-vehicle information data received from the vehicle 51 to the distribution server 30 are not necessarily the same. It is not a thing. However, on-vehicle advertisement content, which is data constituting the distribution content, is considered to have a large capacity for each content, and depending on the system configuration, there is a case where the bandwidth of the terrestrial network is not sufficiently secured.

Therefore, when the individual distribution device 41 receives the vehicle information data from the vehicle 51, the individual distribution device 41 transmits the reception vehicle table information based on the vehicle information data to the distribution server 30. The on-vehicle table information indicates the presence / absence of on-vehicle information to be transmitted to the distribution server 30, specifically, data received from the vehicle 51 (on-vehicle failure information, on-vehicle display performance data).

Next, the distribution server 30 holds table information (server table information) indicating the presence / absence of distribution content to be distributed to the individual distribution device 41, and receives the on-vehicle table information acquired from the individual distribution device 41 and its own server. Based on the table information, the data transmission order is determined in descending order of priority given to each data. The priorities are as described above, and the transmission order here is the same as the transmission order between the individual distribution device 41 and the vehicle 51, (1) on-vehicle failure information, (2) on-vehicle software,. It becomes the order of. The distribution server 30 notifies the individual distribution device 41 of the determined transmission order.

The distribution server 30 and the individual distribution device 41 transmit data according to the determined transmission order. As described above, the data transmitted from the distribution server 30 and the individual distribution device 41 can also be transmitted in order from the one having higher priority data, and efficient transmission can be performed.

In addition, the priority of each data can be freely changed by setting separately in the individual delivery apparatus 41 or the delivery server 30. As a result, as in the first embodiment, an optimal transmission order can be set according to the customer's request, system configuration, and the like.

In addition, although the on-vehicle table information indicates the presence / absence of data, it is not limited to this. As in the first embodiment, it is possible to use information indicating the update / acquisition time of each data, and handle data having a date and time newer than the previous transmission opportunity as a transmission target. In this case, for example, the distribution server 30 that has received the on-vehicle table information specifies data to be transmitted from the individual distribution device 41.

Further, although the description has been given using the distribution server 30 and the individual distribution device 41, this is an example, and the distribution server 30 and the individual distribution devices 42 to 45 are also applicable.

As described above, in the present embodiment, both the data transmission between the distribution server and the individual distribution device are the same as the data transmission between the individual distribution device and the vehicle described in the first embodiment. Priority is given to each data for all data, and data with the corresponding priority is transmitted in order from the one with higher priority data. Thereby, it is possible to efficiently perform data transmission between the distribution server and the individual distribution device in order of higher priority without being biased toward data transmission from one side.

Embodiment 3 FIG.
In the first embodiment, when the distribution content data is transmitted from the individual distribution devices 41 to 45 to the corresponding vehicles 51 to 55, the content data already owned by the vehicles 51 to 55 is not transmitted. By transmitting only the content data that is not owned by .about.55, the amount of data to be transmitted can be reduced to the minimum.

FIG. 4 is a diagram illustrating a process of transmitting only the difference content between the ground side and the train side. First, from the ground side, the individual distribution device 41 requests the owned content list from the vehicle 51. The vehicle 51 transmits a list of contents owned by the vehicle 51 to the individual distribution device 41. The individual distribution device 41 searches for content that is insufficient among content to be distributed to the vehicle 51. For example, as shown in FIG. 4, in the individual distribution device 41, among the ten contents A to J to be distributed to the vehicle 51, the vehicle 51 actually uses the contents A to D, F, Recognize that I have 7 items from I to J. Therefore, the individual distribution device 41 calculates that the insufficient content is the contents E, G, and H, and transmits only the calculated three contents to the vehicle 51 as difference contents.

At this time, as described above, data transmission opportunities between the individual distribution device 41 and the vehicle 51 are limited. For this reason, when the content capacity is large and transmission is not possible in one transmission opportunity, the individual distribution device 41 transmits in order of priority according to the priority of each content. As described above, since priority is given to each content (3) on-vehicle destination content, (4) on-vehicle news content, and (5) on-vehicle advertisement content, for example, content E, When the priority is higher in the order of G and H, the individual distribution device 41 first transmits only the content E and transmits the content G and H at the next transmission opportunity.

In addition, although demonstrated using the individual delivery apparatus 41 and the vehicle 51, it is not limited to this. Similar to the first embodiment, the present invention can also be applied between the other individual distribution devices 42 to 45 and the corresponding vehicles 52 to 55. Further, although the first embodiment has been described, the present invention can also be applied to the second embodiment.

As described above, in the present embodiment, when data of distribution content is transmitted from the individual distribution device to the vehicle, the content data held by the vehicle is confirmed, and only the content data not owned is transmitted. It was decided to. Thereby, the amount of data transmitted from the individual distribution device to the vehicle can be reduced, and data transmission can be performed efficiently.

10 Editing equipment 20 Content DB
30

Distribution server

41, 42, 43, 44, 45

Individual distribution device

51, 52, 53, 54, 55 Vehicle 61 Antenna

Claims

A data transmission system for transmitting data between the ground side and the vehicle side,
An individual distribution device installed on the ground side and holding device table information representing data to be transmitted to the vehicle side;
A vehicle that transmits vehicle table information representing data to be transmitted to the individual delivery device to the individual delivery device when entering the communication area of the individual delivery device;
With
Based on the device table information and the vehicle table information, the individual distribution device has a transmission order in which data is transmitted between the vehicle and itself in descending order of priority given to each data to be transmitted. Decide
The vehicle and the individual distribution device transmit data according to the transmission order.
A data transmission system characterized by that.
A distribution server that is installed on the ground side, holds server table information representing data to be distributed to the individual distribution device, and distributes data for transmission to the vehicle to the individual distribution device;
The individual distribution device transmits table information indicating data received from the vehicle to the distribution server,
Based on the server table information and the table information received from the individual distribution device, the distribution server transmits data between the individual distribution device and itself in descending order of priority given to each data to be transmitted. Determine the transmission order to transmit
The distribution server and the individual distribution device transmit data according to the transmission order.
The data transmission system according to claim 1.
The individual delivery device can change the priority assigned to each data,
The data transmission system according to claim 1.
The vehicle transmits information of acquired data to the individual distribution device,
The individual distribution device determines the transmission order only for data that the vehicle has not acquired,
The data transmission system according to claim 1.
The vehicle transmits information of acquired data to the individual distribution device,
The individual distribution device determines the transmission order only for data that the vehicle has not acquired,
The data transmission system according to claim 2.
The vehicle transmits information of acquired data to the individual distribution device,
The individual distribution device determines the transmission order only for data that the vehicle has not acquired,
The data transmission system according to claim 3.
A data transmission method in a data transmission system for transmitting data between an individual distribution device installed on the ground side and a vehicle side,
A vehicle table transmission step of transmitting vehicle table information representing data to be transmitted to the individual distribution device to the individual distribution device when the vehicle enters the communication area of the individual distribution device;
Based on the device table information representing the data to be transmitted to the vehicle and the vehicle table information, the individual distribution device has the vehicle and itself in descending order of priority given to each data to be transmitted. A transmission order determination step between the individual delivery equipment vehicles for determining the transmission order for transmitting data between them;
The individual delivery device inter-vehicle transmission step in which the vehicle and the individual delivery device transmit data according to the transmission order;
A data transmission method comprising:
The data transmission system is installed on the ground side, holds server table information indicating the presence / absence of data to be distributed to the individual distribution device, and distributes data for transmission to the vehicle to the individual distribution device If you have a distribution server that
A vehicle data table transmission step in which the individual distribution device transmits table information indicating data received from the vehicle to the distribution server;
Based on the server table information and the table information received from the individual distribution device, the distribution server performs data transmission between the individual distribution device and itself in descending order of priority given to each data to be transmitted. A transmission order determination step between distribution server individual distribution devices for determining the transmission order for transmitting
A transmission step between the distribution server and individual distribution devices, wherein the distribution server and the individual distribution devices transmit data according to the transmission order;
The data transmission method according to claim 7, further comprising:
In the individual delivery device inter-vehicle transmission order determination step, the individual delivery device can change the priority given to each data.
The data transmission method according to claim 7.
The vehicle has a retained data transmission step of transmitting acquired data information to the individual distribution device,
Including
In the individual distribution equipment inter-vehicle transmission order determination step, the transmission order is determined only for data that the vehicle has not acquired,
The data transmission method according to claim 7.
The vehicle has a retained data transmission step of transmitting acquired data information to the individual distribution device,
Including
In the individual distribution equipment inter-vehicle transmission order determination step, the transmission order is determined only for data that the vehicle has not acquired,
The data transmission method according to claim 8.
The vehicle has a retained data transmission step of transmitting acquired data information to the individual distribution device,
Including
In the individual distribution equipment inter-vehicle transmission order determination step, the transmission order is determined only for data that the vehicle has not acquired,
The data transmission method according to claim 9.