WO2019034262A1

WO2019034262A1 - Context-dependent display of contents on vehicle surfaces

Info

Publication number: WO2019034262A1
Application number: PCT/EP2017/070943
Authority: WO
Inventors: Andreas Widmann
Original assignee: RoadAds interactive GmbH
Priority date: 2017-08-18
Filing date: 2017-08-18
Publication date: 2019-02-21

Abstract

The invention relates to a server, to a mobile device, to corresponding methods, and to a whole system for the context-dependent display of contents on vehicle surfaces. In one embodiment, a server for providing display data to mobile devices for vehicles is provided. The server can be configured to store display objects, each display object comprising display data and a geographical region. Furthermore, the server can be configured to receive position information, which indicate a current position of a mobile device. The server can also be configured to determine a geographical region that can be reached by the mobile device within a predefined time span and to select at least one stored display object on the basis of the geographical region of the display object and the geographical region that can be reached by the mobile device. The server can also be configured to transmit the at least one selected display object to the mobile device.

Description

Context-dependent display of content on vehicle surfaces

1. Technical Field The present invention relates to a server, a mobile device,

corresponding methods, as well as an overall system for the context-dependent representation of content, in particular on vehicle surfaces.

2. Background

It is known to make the design of vehicles, especially trucks, by painting or printed tarpaulins. However, this makes it very difficult to change the surface design and can only be adapted to the current situation with great difficulty. In particular, the presentation of contextual content is almost impossible. Various devices for contextual representation of content on vehicle surfaces are known in the art.

For example, applicant's utility model DE 20 2016 002 701 Ui relates to the mounting of non-luminous display technologies (eg, electrophoretic displays, e-papers) on the vehicle (in particular tail) for displaying location-dependent and context-dependent contents. Such display technologies can be mounted in a suitable housing on the vehicle. By means of an embedded

Computer system, the display over the Internet depending on the location and any other factors (such as weather, traffic conditions) can be changed.

Furthermore, the utility model DE 20 2013 000 952 Ui proposes to flexibly change and design an advertising content on trucks and to communicate advertising content and warning messages depending on location and time.

European patent application EP 3 082 092 Ai relates to a device comprising at least one camera. The camera allows the analysis of the environment of Device to the displayed on the display of the e-paper basic information on both the detected environment and any existing

Tuning the navigation signal. However, the stated prior art has the disadvantage that the available memory on the mobile device is available only to a limited extent. In addition, the radio connection through which the content is sent to a mobile

Device for contextual representation of content to be transmitted, often brittle, especially in vehicles that are often in tunnels or other places with bad connection.

It is therefore the object of the present invention, a context-dependent

Presentation of content, especially on vehicle surfaces, to allow with particularly gentle resource burden and thus at least partially overcome the disadvantages identified in the prior art.

3. Summary of the invention

The invention is defined in the independent claims. Further advantageous aspects of the invention are defined in the dependent claims. In the embodiment according to claim 1, a server for providing

Display data to mobile devices for vehicles provided. The server may be configured to store display objects, wherein each display object comprises display data and a geographic area. Furthermore, the server may be configured to receive position information indicating a current location of a mobile device. Further, the server may be configured to determine a geographical area reachable by the mobile device within a predefined period of time and to select at least one stored display object based on the geographical area of the display object and the geographical area reachable by the mobile device. The server may be further configured to send the at least one selected display object to the mobile device. According to the invention, at least one display object, which may be stored in a database of the server, is selected based on the geographical area of the display object and the geographical area reachable by the mobile device within a predefined period of time. This is particularly advantageous because in this way only a reduced amount of data over a network of the

Server must be transferred to the mobile device. This is accomplished by not transferring all of the server's display objects to the mobile device, but only those that can be reached by the mobile device within a predefined period of time. The invention thus provides a mobile device with highly relevant display objects without wasting the storage space of the mobile device and at the same time takes into account the usually poor or sporadic data connection between the server and the mobile device.

The server according to the invention is furthermore advantageous because display objects are sent to the mobile device before it actually enters a geographical area in which the display data of a display object is to be displayed. By the server according to the invention, the display objects can be displayed in the designated geographical area even if there is no connection at all from the server to the mobile device, such as in a radio hole, due to tunneling or the like.

In a further aspect of the invention, the server may further be configured to determine whether the geographical area reachable by the mobile device is reachable by other mobile devices within the predefined time period and, if so, to send the at least one selected one

Display object only to one of the mobile devices. In this way, duplications of the display data displayed by the mobile devices can be avoided, which in turn saves the storage space of the mobile devices. Furthermore, it can be avoided in this way that the same display object on several locally adjacent mobile devices for vehicles selected and its display data is displayed, for example, two directly

one behind the other trucks. Furthermore, in this way the visibility, for example in the form of gaze contacts, of display data of a display object can be increased. In another aspect of the invention, the server may be further configured to process a change of one of the display objects and send only the change to the mobile device. This is advantageous because in this way the amount of data to be transferred from the server to the mobile device can be further reduced. This is particularly advantageous when the mobile device is approaching a geographic area where there will be no or only limited connection to the server. According to another aspect of the invention, the server may be further configured to monitor the available storage space of the mobile device and send a delete command to delete at least one display object stored on the mobile device. This way is a simplified

Memory management of the mobile device provided. Furthermore, the server may decide which display objects remaining on the mobile device can be reached within a predefined period of time rather than others. Thus, according to this further preferred aspect, a reduced amount of data to be transmitted from the server to the mobile device can be achieved.

In a further aspect of the invention, determining the geographical area reachable by the mobile device within the predefined period of time may include: storing a history of

Position information of the mobile device, calculating the traversable distance and the direction of movement of the mobile device, determining a first point based on the traversable distance and the direction of movement, and a second and a third point at a predefined angle and determining a bounding box based on the first, second and third point. In this way, the area achievable by the mobile device within a predefined period of time can be limited by an estimate. This in turn results in a further reduced amount of data to be transmitted from the server to the mobile device. According to a further aspect of the present invention, determining the geographical area reachable by the mobile device within the predefined period of time may further comprise: determining a network of road sections accessible from the current location of the mobile device and located in the Bounding box are located. In this way, a more accurate determination of the geographical area achievable by the mobile device within a predefined period of time can be achieved by matching the bounding box to a road network, for example based on conventionally available digital map material. This in turn leads to a further reduced amount of data to be transmitted from the server to the mobile device.

In a further aspect of the invention, each display object may further comprise a global identifier, one or more flags for indicating characteristics of the geographical area, and / or a validity period of time. In this way, the appropriateness or relevance of the sent display objects can be increased. For example, some display of the mobile device in the same geographic area may differ in rainy weather from the display

Sunshine. In addition, some traffic in the same geographical area may be different from the traffic jam during traffic jams. In this way, a particularly high contextual dependence of the data can be achieved, whereby increased traffic safety can be achieved.

In another aspect of the invention, the display data includes an image file as a base64 string and the geographic area as a GeoJSON multipolygon. In this way, a particularly efficient storage of the display objects on the server and more efficient determination of the selected display objects to be sent to the mobile device is achieved.

In a further aspect of the invention, the display data comprises advertising,

Traffic reports and / or warnings. In this way, increased traffic safety can be achieved, for example in congestion or the like

Disabilities that start behind a hilltop or from wrong-handers. Furthermore, the present invention provides a mobile device for displaying display data for vehicles. The mobile device may be configured to transmit position information indicating a current position of the mobile

View device to a server. Furthermore, the mobile device may be configured to receive at least one display object from the server, wherein each display object comprises display data and a geographical area. The mobile device may be configured to store the at least one

Display object. Finally, the mobile device may be configured to select a stored display object based on the current position of the mobile device and the geographical area of the display object and to display the display data of the selected display object.

According to the invention, the mobile device receives display objects selected by a server based on the previously sent position information and for locally selecting a display object, preferably from a local database of the mobile device. In this way, the amount of data to be exchanged between the mobile device and the server according to the invention can be reduced. This is particularly advantageous when the mobile device will enter a geographical area where there is no or only a bad one

There is a connection between the server and the mobile device, for example in a radio hole, or when the mobile device is in a tunnel. Furthermore, in this way too, the amount of data to be transferred between the mobile device and the server can be reduced by the mobile device independently selecting the display data from the display objects of the local database. An approximately required feedback to the server is not necessary in the mobile device according to the invention.

In a further aspect of the invention, selecting a stored display object is further based on a ranking. In this way, the display objects can be weighted. This is particularly advantageous for a display object

To give preference over another display object, for example, based on a current context of the mobile device. In a further aspect of the invention, the ranking has at least one of the following parameters: a time stamp, a priority, a price and / or a maximum bid. In this way, the ranking can be particularly adapted to the situation. In another aspect of the invention, the mobile device is further configured to delete display objects from the memory in response to receiving a clear command regarding the display objects from the server. In this way, a resource-intensive memory management of the mobile device can be delivered to the server. Furthermore, the server can be based on that of the mobile

Device sent position information, a forward-looking

Reach memory management of the mobile device, for example, in which the server leaves display objects of closer accessible geographical areas on the mobile device and the display objects from far away

geographical areas. Also, in this way, the amount of data to be transferred from the server to the mobile device can be reduced because predictive memory management of the mobile device is achieved.

According to another aspect of the invention, the mobile device may be further configured to power up the mobile device in response to a

Receiving an initial signal of the vehicle. In this way, no separate signal for powering up the mobile device, such as by manual operation, is required. This is particularly advantageous for large vehicles because in such cases the mobile device may be far from the position of a driver. According to a further aspect of the invention, the initial signal of the vehicle may be a brake signal. In this way it can be ensured that the mobile device is always in operation while the vehicle is moving. Moreover, this is advantageous because a brake signal is always expected relative to the beginning of each trip of a vehicle. In this way, it is possible that the mobile device is started up as soon as possible.

According to another aspect of the invention, the mobile device may be further configured to set a flag in response to the boot. In this way, a possible shutdown of the mobile device to another Condition, roughly the state of the flag. Thus, a

Shutting down the mobile device will be postponed.

According to a further aspect of the invention, the mobile device according to one of the preceding claims, further configured to display the

Display data of the selected object only if the current position of the mobile device deviates at least by a predefined value from an initially transmitted position information. In this way it can be ensured that the mobile device does not start up immediately after start-up, but allows a certain delay between start-up and operation.

According to a further aspect of the invention, the mobile device may be further configured to compare the last transmitted position information with a position information sent immediately before, and to implement the flag set in response to the start if the most recently transmitted position information and the position information sent immediately before have the same value. In this way, another action of the mobile device may be coupled to the state of the flag. In particular, the flag is thereby implemented if the mobile device has not moved for a certain period of time.

According to another aspect of the invention, the mobile device may be further configured to shut down the mobile device when the flag set in response to the startup has been implemented, and when a last transmitted position information and a position information previously transmitted have an equal value. In this way, the implementation of the flag can be used as another prerequisite for the shutdown of the mobile device. This is particularly advantageous because the mobile device does not have to be manually shut down in this way because the mobile device automatically shuts down when it has not moved for a while and has not been braked.

According to another aspect of the invention, a power supply of the mobile device may take place via pin 10 on a trailer distributor and via pin 7 on the trailer distributor. This is particularly advantageous because in this way the existing standardized connectors to a trailer on vehicles can be used to power the mobile device. Thus, an external power supply for the mobile device can be dispensed with. Furthermore, according to the invention, corresponding methods for operating the server explained in the introduction and the mobile device are provided.

Another aspect of the invention relates to a computer program which

Having instructions for performing the above method.

Finally, the invention also relates to a system which comprises a server according to the invention and at least one mobile device according to the invention.

4. Brief description of the drawing

In the following, preferred embodiments of the present invention are explained with reference to the following figure:

Fig. La and lb: Schematic representation of a bounding box according to a

Embodiment of the invention. Fig. 2: Schematic representation of a circuit diagram for the power supply of a mobile device according to the invention.

3: Display objects with geographical area on a map according to an exemplary embodiment.

4: Position information of a mobile device according to an exemplary embodiment.

5: Calculation of a bounding box according to an exemplary embodiment.

FIG. 6: Bounding box on a card according to a card according to an exemplary embodiment. FIG. Fig. 7: reverse geocoding according to an exemplary embodiment.

Fig. 8: reverse geocoding on a card according to an exemplary

Embodiment.

5. Detailed description of preferred embodiments

Hereinafter, preferred embodiments of a

According to the invention servers and inventive devices for

Context-dependent presentation of content, especially on vehicle surfaces, explained in more detail. The server according to the invention is preferably a central server which manages a plurality of mobile devices, each of which in turn is mounted on a vehicle, e.g. a truck, are arranged.

In order to manage the contents to be displayed on the mobile devices, the server can store display objects, for example in a database. Although a database is discussed below, those skilled in the art will understand that the present invention is equally applicable to other types of memories. In this case, in addition to the display data, preferably as a base64 string, also a geographical area (for example, an advertising area or an area for which a

Traffic warning is relevant) preferably as GeoJSON MultiPolygon and optionally further flags (rain, sun, traffic jam, ...) are preferably stored as boolean variables. Apart from boolean variables, other data types such as flags or enumerations can also be used. In addition, a start and / or end date and / or the period of the display object (e.g., 12:00 - 20:00) may be used for each individual day of the week, and optionally for individual days of the year (e.g.

24.12. o.ä.) be deposited. These factors are matched by the server before the ad is triggered. Should the display data include advertising, then a maximum bid for the corresponding advertising space could also be stored in order to implement a live bidding and to sell the advertising circuit at the best price. For example, a live bidding functionality can be added

Using an open standard such as OpenRTB. For example, a live bidding functionality may be as below will be provided.

In a preferred embodiment, the operation of the mobile device is as follows: Periodically (typically between 8 and 30 seconds, depending on the legislation), a display object can be selected based on the current location of the mobile device from the database and the display data displayed. In addition, a statistics data point (with location, display object identifier and / or timestamp) can be generated. Since the selection of a display object proceeds locally, a suitable display image is displayed even if the mobile

Device currently has no Internet access.

If several display objects are available for a specific location, you can select according to a ranking. The ranking can consist of a timestamp, so that always the display object is displayed, which has not been played the longest. In addition to the time stamp, for example, a price and / or a maximum bid can be mentioned as a ranking factor. If the ranking has a price and / or a maximum bid, the ranking can be implemented as a live bidding. For example, customer A posts display data, such as an ad for a geographic area, such as a particular ad area, and wants to pay for ad 50 et. Customer B posts an ad for the same ad area, but wants to pay 70 et for the ad. This could increase the display of B and he would win the bid. In addition, different customer or ad groups with different priority can be parameters of the ranking. For example, traffic alerts have a higher priority than advertisements. For example, advertisements from customers have a higher priority than self-promotion by the applicant. The ranking can also be combined, so that, for example, first the priority, then the maximum bid and then the time stamp will be used. The mobile device on the vehicle exchanges (preferably continuously) data with the server, which are preferably transmitted in encrypted form. The mobile

In this case, the device can authenticate itself with a hash, which is compared with the database and sends its current position information and, if present, statistical data points on the last display data. The statistics data points can transfer to a global statistics database on the server and the

Timestamp of the stored display objects to be adjusted accordingly. All display data may have a timestamp of when it was last viewed. After this time stamp can be ranked. If these display data are now shown again, the mobile device can then use a

Send statistics data point with the time stamp to the server. This timestamp is newer than the one already stored for the display data on the server. Therefore, the server can override the timestamp for the display data. This changed timestamp can also be transmitted to other mobile devices, for example other trucks. As a result, the display data changes, and display data which has not been displayed longest on any mobile device can always be displayed. This makes the timestamp ranking global.

The server preferably stores not only the current position information of the mobile device but also the previous ones. So can on the server for each mobile

Device a database entry may be present, in which the current position of a mobile device is stored, which can be overwritten by the server when new position data is sent from the mobile device. As a result, the server always has the last stored position when new position data arrives. As a result, the direction of travel and also the current speed can be determined. In addition, as explained above, the statistics points of the display data may also include position data. Therefore, in regular

Distances, for example, every 30 seconds, the position of the mobile

Device are stored. Since the statistics data points are not deleted, they can be used to determine the distance traveled in a given

Period and / or to determine an average speed, etc. are used. In this case, one point can be determined on the basis of the traversable distance and the direction of travel, as well as two further points in each case at a specific angle (for example 25 degrees) thereof, from which a bounding box can be calculated (see Fig. 1a and Fig. 1b).

Fig. La and lb each show a corresponding bounding box according to a

Embodiment of the present invention. Pos. 1 designates a position information already received by the mobile device at the server. Pos. denotes the current received position information of the mobile device. Based on the two position information item 1 and item 2, a direction vector can now be calculated (see the arrows marked "direction of travel" in FIG.1a and 1b)

Position information Pos. 1 and Pos. 2 a zurücklegbare distance are determined. By means of the direction vector and the distance which can be covered, a point Pi can be determined which unites the two pieces of information. Furthermore, based on the direction vector, two further vectors can be calculated which are at a predetermined angle to the already calculated direction vector (for example 25 degrees).

In this case, the predetermined angle can be situation-dependent. For example, the predetermined angle on the highway (which is mostly straight and where no steep turns are to be expected) may be smaller (preferably> = 10 degrees and <= 25 degrees, more preferably 15 degrees), while a larger predefined angle (preferably > = 25 degrees and <= 40 degrees, more preferably 30 degrees) can be used for the calculation, as a larger angle increases the geographical area to be reached and thus allows more room for curves.

The ends of these two further calculated vectors are denoted by the points P2 and P3 in FIG. 1a and FIG. 1b. Finally, a bounding box can now be calculated, where the points Pos. 2, Pi, P2 and P3 represent coordinates, from which then a minimum value in the X direction, a maximum value in the X direction, a minimum value in the Y direction and a maximum value in the Y direction can be determined. Through these coordinates, a rectangle can then be spanned, which runs through Pos. 2. The use of a rectangle is advantageous because interfaces to card services, such as Open Street Map accept only rectangles as input values. In addition, would be at

Use of a circle would also be included areas on the already covered distance, which can not be reached by the mobile device. In addition, by using a rectangle instead of a circle, the amount of data to be transferred can be reduced.

Then, for example, through the Open Street Map Search Engine

"Nominatim", a reverse geocoding performed with the current position and It is determined on which road section (eg OSM ID) the mobile device or the vehicle is currently located. Now, using the Overpass API (also known as Open Street Map), you can retrieve all the OSM elements that are related to this element and are in the generated bounding box. It is thus possible to generate a network of all points that can be reached from this street within the bounding box. This network can be extended or limited depending on the setting of parameters (eg only highways in the search

include or similar). In addition, the current weather and the traffic situation can be determined via the coordinates of the mobile device. It is also possible that these factors are directly determined via sensors on the mobile device. For example, weather data about temperature and

Humidity sensors are generated. For example, about

Proximity sensors are used to determine if other vehicles or objects are nearby. In combination with a calculation of the speed of the mobile

Device, such as a truck, this could be used to draw conclusions about the current traffic situation. In addition, camera systems with automatic image analysis can be used. In addition, it is possible to send these particular factors of the mobile device to the server and / or to validate the transmitted factors from the server on the mobile device.

Based on the achievable geographical areas, time, weather and / or

Traffic situation, the smallest possible subset of globally available display objects is created. The other factors can be extended, for example, by other information available on the Internet, for example as a bool variable.

In addition, the selection of the display objects can be re-ordered according to the ranking factor.

If several vehicles, for example trucks, are traveling in the same area and enough display objects are available, these can be distributed to the individual vehicles in order to avoid duplication of the display.

Overall, can be by the above measures or any

Combinations thereof greatly reduce the amount of data transferred between the server and the mobile device while still displaying enough advertisements at a time The mobile device is available to bridge periods without an Internet connection, with only a fragile Internet connection, or with only slow Internet connection. This is particularly advantageous if the mobile device is located approximately in a radio hole, a tunnel or abroad.

The generated points (for example those of the bounding box) can be compared in a further step with the multi polygons in the database.

If there is a point in a polygon, the corresponding display object can be returned. This allows a much smaller subset of

Display objects are generated, which (if all other parameters also apply and the display data is not stored locally on the mobile device) can be sent back to the mobile device. As a result, the amount of data transferred can be reduced enormously, as only really relevant

Display objects are transferred. It will be appreciated that the method of the invention may also be used to predict where the mobile device will move and which cities will be reached soon, for example.

On the server can also be stored, which display objects are currently on the mobile device, such as a mobile device, which is attached to a truck. These display objects can in turn be provided with a time stamp which marks the last change. If a user changes or deletes a display object (e.g., geographic area, display data, or runtime), those changes may also be transmitted to the mobile device. As a result, only the display objects are transmitted that are not already present on mobile device.

The server may also monitor the memory requirements of the mobile device and delete older display objects to make room for new ones

Release display objects. For example, the server may delete display objects of the mobile device when a memory occupancy of the mobile device has reached 80%. The server's response may thus include a set of display objects to be added newly and / or changes to existing display objects. In addition, a command can be sent to display certain display data immediately. This is the case, for example, when a traffic message is to be displayed

(For example, an indication of an accident site or a jam end). These

Traffic disruptions may also be determined based on direction of travel, speed and / or current position information (optionally via an external API, such as the TomTom Online Traffic Incidents API). If such a command is included in the response, current display data may be interrupted to show the corresponding display.

In a next step, the transmitted display objects can then be stored locally on the mobile device. In this case, the actual selection of a display object may be based on the received subset and may be exclusively local, i. on the mobile device, take place. It can thereby be achieved that display objects stored on the mobile device are always very topical.

In addition, however, can be achieved at the same time that dead spots or similar. can be bridged well, because displaying the display data of a display object does not depend on an Internet connection.

Fig. 2 shows a schematic representation of a circuit diagram for the power supply of a mobile device according to the invention. The mobile device is powered by two different power sources. Firstly, the mobile device is permanently supplied with a 24V voltage (via pin 10 on the trailer distributor or ISO-12098 connector) Vi, which is also given when the vehicle is switched off. On the other hand, the mobile device is supplied with voltage via the brake light (via pin 7 on the trailer distributor or ISO-12098 plug) V2. This is only available when the brake is applied in the vehicle. When the truck is braked for the first time, the relays 1 and 2 are switched via V2 and a current from Vi flows and supplies the system so that it can start up. In addition, the 5V relay is switched through the system itself, which conducts the current from Vi to relay 1, whereby relay 1 keeps itself open. As a result, power is still present when the brake is no longer actuated. Thus, enough a short kick on the brake (which will happen relatively soon after starting the engine) to trigger the system to start up.

The truck can now determine its current position information via GPS, for example, and continuously check whether the position information changes, ie whether the truck is moving. Only after the truck has moved away from its original location by a predefined value, for example a defined distance (for example 10 km) can the display of display objects be started. This has the purpose that the display objects that are stored on the mobile device are not already displayed at the starting point, for example on the farm of the truck operator, but, for example, only when the truck is on the highway.

Once the mobile device has booted up and has departed a predefined value from a starting point, the mobile device can begin its normal operation. The display of display objects can then take place as already explained.

About the circuit diagram for the power supply of a mobile invention

Device according to FIG. 2 can not be detected, whether the vehicle,

For example, a truck is still running, but only if the brake is applied. This is done as explained above via a high at the input pin of the system. If such a high is detected, a bool variable can be set to true. This can

happen continuously and independently of other processes of the mobile device.

In addition, at regular intervals (for example, every 2 minutes), for example by means of GPS position information is determined and checked whether the truck has moved. If no movement was detected, then the above variable can be checked. If the variable is set to true, it can initially only be set to false. However, if it has already been set to false, the display of display objects can be stopped and the last

Statistics data points are sent to the server. However, in the next check, either a movement has been detected or the bool variable set to true, the display of display objects can be restarted. If, in a next check, no movement is detected again and the variable is still set to false, then it can be assumed that the truck has been shut down and the system can be shut down.

The mobile shutdown signal can be used to switch the 5V relay, which stops current flow to relay 1 and allows the system to be completely disconnected.

After the mobile device has been shut down, it may be re-prompted by the actuation of the brake (as explained above)

boot.

Hereinafter, a specific embodiment according to the present invention will be explained. In this example, four display objects are stored on the server. Further, the example has two mobile devices mounted on each truck:

There are four ads with different ad areas on the server. Each of these displays has an id (\ "id \"), an area (\ "areas \") entered by

Multipolygon ("type: Multipolygon") is determined with four coordinates ("coordinates"), and two display data ("images"):

Fig. 3 shows the above exemplary display objects with their geographical area on a map. In addition, in the exemplary embodiment, two trucks are registered. Each of these trucks has an identifier ("id"), name, user and weather. Furthermore, a truck entry includes traffic information, stored display objects ("images"), a current position ("position"), and displayed display data

("Advertisements") on.

In the example truck 1 drives on 25.07.2017 at 13:34 on the A656. His last position stored on the server (field "position") is marked with Pi, the new position he now sends to the server with P2. Fig. 4 shows position information Pi and P2 of truck 1 on a map section.

Truck 1 sends this object encrypted to the server:

{

The "statistics" field contains all the statistics points of previous adver- tisements that have not yet been transmitted to the server. These are transferred from the server to the global database. The timestamp of this statistic object is younger than the timestamp of the corresponding advertisement in the field "lastShown", therefore it will be overwritten:

The server now fetches the position stored for the truck in the database

[8.591909408569336,49.441845172680786] and calculates the bounding box with the newly transferred point as shown in FIG. Fig. 6 shows the calculated bounding box on a card. Next, using the sent point, Nomatim will reverse geocode to calculate the OSM ID of the road on which the truck is currently located. Based on this ID, all associated OSM nodes within the bounding box are now determined with the help of the overpass API

Road course and any branches. Fig. 7 shows the calculation by reverse geocoding. Fig. 8 shows the result of calculation by reverse geocoding on a map. A MongoDB $ geoWithin query can be used to check which ad areas contain these points and return the corresponding ads, if they are not already on the truck and match the traffic and weather fields of the truck. These are sent back to Truck 1 in the server response. In our example, these are the ads RoadAds 2, RoadAds 3, and RoadAds 4.

In a variation of the present example where, for example, 100 is involved instead of the only three, only a smaller subset (e.g., 10) may be returned. Since Truck 2 is also in the same area and goes through the same process as Truck 1, Truck 2 could get the ten next ads.

As soon as truck 1 has received the answer, it saves the new ads in its local database, deletes the sent statistics data point and starts a new request with its new position to the server.

Regardless of the process exemplified, display of the display objects is performed. The truck again determines its coordinates,

for example, via GPS and puts a $ geoWithin query with this point to its own local database. The returned ads will be sorted in ascending order of the lastShown field and the oldest ad will be selected and displayed, in this example "RoadAds 4". In addition, a timestamp can be created, which is stored together with the ID of the display and the current position as a new statistical data point and the field "lastShown" of the corresponding display can be overwritten with this timestamp.After a predefined time, for example after 30 seconds, the If nothing has changed in the local database, for example because no new ads have been added, then "RoadAds 3" should now be displayed.

Claims

claims

A server for providing display data to mobile devices for vehicles, wherein the server is configured to:

Storing display objects, wherein each display object comprises display data and a geographical area;

Receiving position information indicating a current position of a mobile device;

Determining a geographic area accessible by the mobile device within a predefined period of time;

Selecting at least one stored display object based on the geographic area of the display object and the geographic area reachable by the mobile device; and

Sending the at least one selected display object to the mobile device.

2. The server of claim 1, further configured to:

Determining whether the geographic area reachable by the mobile device is reachable by other mobile devices within the predefined time period; and if yes

Sending the at least one selected display object to only one of the mobile devices.

3. The server of claim 1 or 2, further configured to:

Processing a change to one of the display objects; and

Send only the change to the mobile device.

The server of any preceding claim, further configured to:

Monitoring the available storage space of the mobile device; and sending a delete command to delete at least one on the mobile

Device stored display object.

The server of any of the preceding claims, wherein determining the geographic area reachable by the mobile device within the predefined time span comprises:

Storing a history of position information of the mobile device; Calculate the traversable distance and the direction of movement of the mobile

Device;

Determining a first point on the basis of the traversable distance and the direction of movement, as well as a second and a third point in one

predefined angle;

Determine a bounding box based on the first, second and third

Point.

The server of claim 5, wherein the determining of the mobile

Device within the predefined time reachable geographical area further comprises:

Determining a network of road sections accessible from the current location of the mobile device and located in the bounding box.

The server of any preceding claim, wherein each display object further comprises:

a global identifier;

one or more flags for displaying characteristics of the geographical area; and or

a validity period.

The server of any preceding claim, wherein the display data includes an image file as a base64 string and the geographic area as a

GeoJSON multipolygon is defined.

9. The server according to any one of the preceding claims, wherein the display data include advertising, traffic reports and / or warnings.

10. A mobile device for displaying display data for vehicles, wherein the mobile device is configured to: Sending position information indicating a current position of the mobile device to a server;

Receiving at least one display object from the server, each display object comprising display data and a geographic area;

Storing the at least one display object;

Selecting a stored display object based on the current position of the mobile device and the geographical area of the display object; and

Display the display data of the selected display object.

11. The mobile device of claim 10, wherein selecting a stored display object is further based on a ranking.

12. The mobile device of claim 1, wherein the ranking comprises at least one of the following parameters:

A timestamp;

A priority;

A price and / or

A maximum bid.

13. The mobile device of any preceding claim, further configured to:

Deleting display objects from the memory in response to receiving a delete command regarding the display objects from the server.

14. The mobile device of any preceding claim, further configured to:

Powering up the mobile device in response to receiving an initial signal of the vehicle.

The mobile device according to claim 14, wherein the initial signal of the vehicle is a brake signal.

The mobile device of claim 14 or 15, further configured to: Set a flag in response to startup.

17. The mobile device of any one of the preceding claims, further configured to:

Display the display data of the selected object only if the current one

Position of the mobile device deviates at least by a predefined value of an initially transmitted position information.

18. The mobile device according to any one of the preceding claims 14 to 16, further configured to:

Comparing the last transmitted position information with a position information previously sent directly; and

Converting the flag set in response to the startup if the last transmitted position information and the position information previously sent have the same value.

19. The mobile device of claim 18, further configured to:

Shut down the mobile device when in response to the

Startup set has been implemented and when a last sent

Position information and a directly previously sent position information have an equal value.

20. The mobile device according to one of the preceding claims 15 to 19, wherein a power supply of the mobile device takes place via pin 10 on a trailer distributor and via pin 7 on the trailer distributor.

21. A method of providing display data to mobile devices for vehicles, comprising:

Determining a geographic area accessible by the mobile device within a predefined period of time; Selecting at least one stored display object based on the geographic area of the display object and the geographic area reachable by the mobile device; and

Sending the at least one selected display object to the mobile device.

22. A method of displaying display data on a mobile device for vehicles, comprising:

Sending position information indicating a current position of the mobile device to a server;

Storing the at least one display object;

Display the display data of the selected display object.

23. A computer program having instructions for performing a method according to one of claims 21 or 22.

24. A system comprising:

a server according to any one of claims 1-9; and

at least one mobile device according to any of claims 10-20.