阅读说明：本技术 数据传输装置和一车辆用数据传输方法 (Data transmission device and data transmission method for vehicle ) 是由 U·施特林 M·门策尔 于 2018-04-26 设计创作，主要内容包括：所述发明涉及一种用于在一车辆(12)通信网络(11)中传输数据的数据传输装置(1),该装置包括：一数据接收装置(2),一数据处理装置(3),其中,数据处理装置(3)设置用于,基于一预定条件经由一过滤器装置(7)对接收到的数据进行过滤,以及其中,数据处理装置(3)设置用于,由过滤后得到的数据生成至少一个具有至少一个参数的数据对象,其中,数据处理装置(3)还设置用于,检查是否所述至少一个数据对象的至少一个参数的一状态信息相对于至少一个所述数据对象的至少一个所述参数的一状态信息已在一较早时间点发生了改变,以及其中,数据处理装置(3)还设置用于,将至少一个数据对象的至少一个参数经改变的状态信息传输给数据应用装置(6)。(The invention relates to a data transmission device (1) for transmitting data in a communication network (11) of a vehicle (12), comprising: a data receiving device (2), a data processing device (3), wherein the data processing device (3) is provided for filtering the received data via a filter device (7) on the basis of a predetermined condition, and wherein the data processing device (3) is provided for generating at least one data object with at least one parameter from the filtered data, wherein the data processing means (3) are further arranged for checking whether a status information of at least one parameter of said at least one data object has changed at an earlier point in time with respect to a status information of at least one said parameter of at least one said data object, and wherein the data processing device (3) is also provided for transmitting the changed state information of the at least one parameter of the at least one data object to the data application device (6).)

1. A data transmission apparatus (1) for transmitting data in a communication network (11) of a vehicle (12), the apparatus comprising:

a data receiving device (2) with an antenna device (13) for receiving data transmitted from a data transmitting device (15),

a data processing device (3) for processing received data which can be transmitted from the data receiving device (2) to the data processing device (3) via a first communication interface (4), wherein the data processing device (3) can be connected to a data application device (6) via a second communication interface (5) for transmitting the processed data, wherein,

the data processing device (3) is provided for filtering the received data via a filter device (7) on the basis of a predetermined condition, and

wherein the data processing device (3) is provided for generating at least one data object with at least one parameter from the filtered data,

wherein the data processing means (3) are further arranged for checking whether a status information of at least one parameter of said at least one data object has changed at an earlier point in time with respect to a said status information of at least one said parameter of at least one said data object, and

the data processing device (3) is also provided for transmitting the changed state information of the at least one parameter of the at least one data object to the data application device (6).

2. A data transmission device (1) as claimed in claim 1, wherein the data processing device (3) comprises a storage device (9) for storing the generated at least one data object.

3. The data transmission device (1) according to one of the preceding claims, wherein the data processing device (1) is arranged for transmitting a reference data object of the at least one data object to the data application device (6) if the data transmission device (1) determines that the at least one data object is transmitted to the data application device (6) for the first time.

4. The data transmission device (1) according to one of the preceding claims, wherein the second communication interface (5) is provided as a communication bus, in particular a Controller Area Network (CAN) bus.

5. The data transmission device (1) according to one of the preceding claims, wherein the data processing device (3) is provided for transmitting the generated at least one data object to the data application device (6) on the basis of a clock signal, which can be generated by a clock generator and can be transmitted to the data processing device (3), in defined, in particular settable, time intervals.

6. The data transmission device (1) according to any one of the preceding claims, wherein the data application device (6) comprises a storage device (10) for storing the received at least one data object in a predetermined data format.

7. The data transmission device (1) according to claim 6, wherein the predefined data format of the data application device (6) for storing the received at least one data object is arranged as a list or table that can be created by the data application device (6).

8. The data transmission device (1) according to any one of the preceding claims, wherein the at least one parameter of the at least one data object comprises information about a location and/or a time specification and/or about a speed of the data transmission device (15).

9. The data transmission device (1) according to one of the preceding claims, wherein the changed state information describes a relative position of the data transmission device (15) at a defined point in time in a position specification of at least one parameter of at least one data object.

10. The data transmission device (1) according to one of the preceding claims, wherein the changed state information describes a difference of the data transmission device (1) at a synchronization time in a time specification of at least one parameter of at least one data object.

11. The data transmission device (1) according to one of the preceding claims, wherein the changed state information describes a relative speed and a relative position of the data transmission device (15) at a defined point in time in a speed specification of at least one parameter of at least one data object.

12. The data transmission device (1) according to one of the preceding claims, wherein the at least one parameter of the at least one data object comprises a status information about a technical component of the data transmission device (15).

13. The data transmission device (1) according to one of the preceding claims, wherein the data processing device (3) is provided for transmitting current state information of at least one data object already stored in the storage device (9) of the data processing device (3) to the data application device (6) after a change of the state information of at least one parameter of a predefined number of at least one data object has been transmitted or after a predefined time duration.

14. A method (100) for transmitting data with a data transmission device (1) in a communication network (11) of a vehicle (12), wherein the data transmission device (1) comprises a data receiving device (2), a data processing device (3) which can be connected to the data receiving device (2) via a first communication interface (4), and at least one data application device (6) which can be connected to the data processing device (3) via a second communication interface (5), comprising the following steps:

receiving (101) data transmitted from a data transmitting device (15) via a data receiving device (2);

filtering (102), by means of the data processing device (3), the received data on the basis of a predefined condition;

generating (103), by means of a data processing device (3), at least one data object from the filtered data, wherein the at least one generated data object has at least one parameter,

checking (104), by means of the data processing device (3), whether a status information of at least one parameter of the at least one data object has changed at an earlier point in time with respect to a status information of at least one said parameter of at least one said data object, and

-transmitting (105) the changed state information of the at least one parameter of the at least one data object to a data application device (6).

15. A vehicle (12), characterized in that the vehicle (12) has a data transmission device (1) according to any one of claims 1 to 13, the data transmission device (1) being intended for transmitting data in a communication network (11) of the vehicle (12).

Technical Field

The invention relates to a data transmission device for transmitting data in a vehicle communication network.

Background

Currently, vehicle-to-outside information exchange (V2X) communication for vehicles based on the IEEE 802.11p standard is introduced into the market. Vehicle-to-outside information interaction (V2X) communication improves vehicle digital communication capabilities, aims to improve the safety of traffic participants participating in traffic, and optimizes traffic flow. In vehicle-to-outside information interaction (V2X) communication, data is transmitted wirelessly between individual participants. Individual traffic participants are usually provided as control devices. Wireless transmission typically occurs at a data rate of about 6 megabytes per second. The data to be transmitted are additionally coded according to the asn.1 standard, some of which even use the so-called "compression coding rules". The amount of data to be transmitted in the vehicle is significantly increased if the data to be transmitted is to be combined in a control unit with other data, such as ambient data of other sensors. For this reason, a powerful, but expensive communication bus, such as an ethernet or Flexray communication bus, is required to connect the control devices involved in the vehicle. A Controller Area Network (CAN) bus system, which is usually used in a vehicle communication network, CAN no longer satisfy the transmission requirements for the data quantity when a surrounding environment sensor is integrated between the control devices, with a maximum bandwidth of 500 kbytes per second.

Disclosure of Invention

The object of the invention is therefore to provide a data transmission device for a vehicle, by means of which data transmission with a high data transmission rate can be achieved between a vehicle-to-environment information exchange (V2X) control device and other control devices in the vehicle while using a cost-effective communication bus.

According to the invention, this object is achieved by the features of the independent claims. Advantageous embodiments of the invention are subject of the dependent claims, the description and the figures.

According to a first aspect, the invention relates to a data transmission device for transmitting data in a communication network for a vehicle, comprising a data receiving device with an antenna device for receiving data transmitted by a data transmitting device, and a data processing device for processing the received data which can be transmitted from the data receiving device to the data processing device via a first communication interface, wherein the data processing device can be connected via a second communication interface to at least one data application device for transmitting the processed data, wherein the data processing device is provided for filtering the received data via a filter device on the basis of a predetermined condition, and wherein the data processing device is provided for generating at least one data object with at least one parameter from the filtered data, wherein the data processing device is further configured to check whether a status information of at least one parameter of the at least one data object has changed relative to a status information of at least one of the parameters of at least one of the data objects at an earlier point in time, and wherein the data processing device is further configured to transmit the changed status information of at least one parameter of at least one data object to the data application device.

The vehicle may be a motor vehicle, in particular a car, a lorry, a motorcycle, an electric motor vehicle or a hybrid motor vehicle.

In this case, a data object can be generated from a plurality of messages or messages received and transmitted from the data transmission device to the vehicle. Here, the data transmission device may be provided as another vehicle that may also be referred to as a second vehicle. The data transmission device can also be provided as an infrastructure device, for example a traffic light or a transmitting antenna, or as a communication device for a (mobile) traffic participant, for example a pedestrian or a cyclist, which transmits messages or messages to the vehicle via an air interface. These messages or messages are then received by the data receiving device of the vehicle data transmission device.

In this case, the received messages or messages can be passed through a primary prefiltration in the data transmission device. This means that only messages relevant to a said relevant and data object to be created are filtered out from a received set of messages. In this case, the number of data objects to be used can be reduced to, for example, ten data objects, the data of which and/or the updated incremental information of which are to be transmitted to the respective data processing device.

The basic idea of the invention is to first check, by means of a query, whether a status information of one or more parameters of at least one data object has changed with respect to a previous query time point before the data of the at least one data object is transmitted by means of a corresponding compression from the data processing device to the data application device via the second communication interface. If this is the case, only the change in status information is transmitted via the second communication interface, i.e. an increment between one or more of the involved parameters of the at least one data object, a previous status information and a current or newer status information, is transmitted via the second communication interface. I.e. always only the latest information, the so-called incremental information, of a previous or older status information regarding one or more parameters of at least one data object is transmitted.

The advantage is thereby achieved that valuable bandwidth can be saved in the data transmission, since not all state information of one or more parameters of the at least one data object is always transmitted. Thus, even in the case of a high data throughput, communication buses which are limited or designed for a specific data bandwidth, such as a Controller Area Network (CAN) bus, but which are cost-effective, CAN be used for a vehicle-to-environment information exchange (V2X) communication system for a vehicle. Thus, a data-intensive application, such as the incorporation of ambient sensors, in a vehicle-to-ambient information interaction (V2X) communication system CAN also be implemented efficiently using a Controller Area Network (CAN) bus at a cost that is cost-effective and reasonable.

Furthermore, the advantage achieved with the data transmission device according to the invention is that, due to the compression, the amount of data to be transmitted per defined period is reduced or limited to a necessary minimum, so that the bandwidth available for a communication interface in the form of a communication bus can be optimally utilized by a corresponding compression of the data before the data are actually transmitted from the data transmission device to the data application device concerned.

According to an embodiment of the invention, the data processing device comprises a storage device for storing the generated at least one data object. The advantage achieved thereby is that the status information of the at least one data object to be generated and of the at least one parameter of the at least one data object can be stored. In this way, the data processing device can detect a change in the status information of at least one parameter of at least one data object by storing the status information of at least one parameter of at least one data object at an earlier point in time in the storage device and comparing it with the status information of at least one parameter of at least one data object at a current point in time. In this way, a relative increase of a changed state information of at least one parameter of at least one data object compared to a previous query time point or an earlier query time point can be detected in a simple and efficient manner.

According to one embodiment of the present invention, a data processing apparatus has a processor. This achieves the advantage that one or more data objects containing one or more parameters can be generated from the received data as a message or message transmitted from the data transmission device to the data transmission device. Each of these parameters in turn comprises at least one status information whose value can be changed accordingly. A parameter may be, for example, the state of a vehicle lamp. If the state of the vehicle is changed, for example, if the vehicle light concerned is turned off, the state information of the parameter is also changed.

According to an embodiment of the invention, the data processing device is arranged for transferring a reference data object of the at least one data object to the data application device if the data transfer device determines that the transfer of the at least one data object to the data application device is performed for the first time. This achieves the advantage that a complete data record of the generated data object has to be transmitted to the data application only once and that, with each change of a status information item of a parameter of at least one data object, all data items of the other data objects do not have to be transmitted simultaneously or anew. The data application means are arranged for storing the complete data record of each data object sent to the device, for example in a so-called reference table or in a suitable manner for storing data objects and their data lists. The respective status information of the parameters of the respective data object is written in a reference table of this type and transmitted to the change of the data application. Thereby, the data objects stored in the reference table and their values, i.e. the status information of the parameters of these stored data objects, are continuously updated.

According to an embodiment of the invention, the second communication interface is configured as a communication bus, in particular a Controller Area Network (CAN) bus. The advantage is achieved that a cost-effective communication bus can be used in a vehicle-to-environment information exchange (V2X) communication system for transmitting at least one data object and data-intensive applications such as a sensor collection can be carried out and executed. Thus, the use of a more powerful, but also more expensive, communication bus system is no longer necessary.

According to one embodiment of the invention, the data processing device is provided for transmitting the generated at least one data object to the data application device at the data processing device for a defined, in particular adjustable, time period on the basis of a clock signal that can be generated by a clock generator. This achieves the advantage that the data of the transmission control device, i.e. the data processing device, is synchronized with the data of the reception control device, i.e. the data application device, after a defined time, for example after 10 seconds. Another possibility is to send all information about the existing data object and the respective status information to the associated parameter again after a defined number of changes to a status information of at least one parameter of at least one data object, for example after 100 transmissions. In this way, the robustness of the entire system can be ensured. However, another method may also comprise, after a certain number of incremental data transfers in bytes, i.e. after a change in status information of the parameters of the individual data objects transferred, transferring again an entire data record of all data objects present on the data processing device to the data application device at a defined point in time.

According to an embodiment of the invention, the data application means comprises a storage means for storing the received at least one data object in a predetermined data format. This achieves the advantage that data objects stored in a predefined data format and their current state, including a predefined level of detail, i.e. for example a defined number of information bytes, can be called up at any point in time from other control devices.

According to an embodiment of the invention, the predetermined data format of the data application means for storing the received at least one data object is arranged as a list or a table that can be created by the data application means. The advantage is thereby achieved that a table of this type, also referred to as a reference table, stores all data objects sent to the data application device according to a definable system taxonomy. The contents of the table, i.e. the individual data objects, can thus be unambiguously located or can be interacted with via the table address, in particular also for other control devices in the data application.

According to an embodiment of the invention, the at least one parameter of the at least one data object comprises an information about a position and/or a time specification and/or a speed of the data transmission device. This achieves the advantage that, by transmitting data to the data transmission device, the corresponding properties of the data transmission device or status information, for example a position specification or a speed specification of the data transmission device or a state of a technical component, are also transmitted. Here, the attributes or status information of these data transmission devices to be transmitted, i.e. the format of the respective position, time specification or speed, etc., may differ significantly: thus, the time specification may be given in absolute terms of universal time and the definition of bits indicating an exact or specific date may be omitted. In one position information, for example, the upper bits may be omitted. Thus although a location repeats every 5 km, for example. But the position of the transmitting device can still be unambiguously reproduced from the existing remaining data in case the reception range is for example less than 2.5 km.

Further optimization of the amount of data transferred from the data processing device to the data application device may be performed as follows:

for example, if an absolute position is stored together with an absolute time stamp in a table in the receiving means of a data application device and/or in the receiving control means of a generated data object velocity value, it is sufficient if the table is recorded over a correspondingly large period of time, for example a few seconds in this case. The data to be transmitted from the data processing device to the data application device can then obtain a reference in the table in order to optimize the transmission of the data in the following manner:

only one change or one increment is transmitted at a system time which is already stored in the data application device, wherein the system time is applied on the communication bus at the time of the data transmission.

A relative position is used, e.g. from an angle specification and a distance or a distance of each spatial axis, wherein the relative position of an (external) object is the position at which the data receiving device receives each respective message or message at the point in time.

The description of a relative speed of the data transmission device is used, wherein the relative speed refers to the relative speed at the time point when each corresponding message or message is received by the data receiving device from the data sending device.

According to an embodiment of the invention, in a position specification of at least one parameter of at least one data object, the changed state information represents a relative position of the data transmission device at a defined point in time. This achieves the advantage that, based on the specification of the absolute position which has been stored beforehand in a table of the data application device, only a part of the information about the position of a defined object has to be transmitted, thereby reducing the amount of data to be transmitted to the data application device.

According to an embodiment of the invention, the changed status information represents a difference from the system time of the data transmission device in a temporal representation of the at least one parameter of the at least one data object. This achieves the advantage that, based on an absolute time specification which has been stored beforehand in a table of the data application device, only a part of the information relating to a time specification has to be transmitted, whereby the amount of data to be transmitted to the data application device is likewise reduced.

According to an embodiment of the invention, in a velocity specification of at least one parameter of the data object, the changed state information represents a relative velocity of the data transmission device at a defined point in time. This achieves the advantage that, based on the specification of the absolute velocity, which has been stored beforehand in a table of the data application device, only partial information about a defined velocity, a specification of the relative velocity, has to be transmitted by the data transmission device, whereby the data to be transmitted to the data application device is reduced.

According to an embodiment of the invention, the at least one parameter of the at least one data object comprises a status information about a technical component of the data transmission device. This achieves the advantage that only a state change of a technical component, for example a light state of a specific light of the vehicle, is transmitted, without the status or state of all the lights being transmitted continuously in each message transmitted to the data application.

According to one embodiment of the invention, the data processing device is provided for transmitting the current information of the at least one data object stored in the storage device of the data processing device after a change of the status information of the at least one parameter of the at least one data object by a predetermined number of transmissions or after a predetermined duration of transmission to the data application device. This achieves the advantage that the data of the data object in the control device, i.e. the data processing device, which transmits the data, is synchronized with the data of the data object in the receiving control device, i.e. the data application device, at defined time intervals, which increases the robustness of the overall system.

According to one embodiment of the invention, the data processing device is provided for generating a first data object and at least a second data object from the received data. This achieves the advantage that a plurality of messages received by the vehicle are combined according to defined criteria, for example by means of a corresponding prefiltering, and processed into one or more data objects and then transmitted to the data application. This allows a more efficient transfer of large amounts of data and makes the best use of the available bandwidth.

According to a second aspect, the invention relates to a method for transmitting data in a vehicle communication network, wherein the data transmission device comprises a data reception device, a data processing device which can be connected to the data reception device via a first communication interface, and at least one data application device which can be connected to the data processing device via a second communication interface, comprising the following steps: receiving data transmitted by a data transmitting device through a data receiving device; filtering, by the data processing device, the received data based on a predefined condition; generating, by the data processing apparatus, at least one data object from the filtered data, wherein the at least one generated data object has at least one parameter; checking, by the data processing apparatus, whether a status information of at least one parameter of at least one data object has changed at an earlier point in time relative to a status information of at least one said parameter of at least one said data object; and transmitting the changed state information of the at least one parameter of the at least one data object to the data application apparatus. With the method according to the invention the advantages already described above are achieved.

According to a third aspect, the invention relates to a vehicle having a data transmission device for transmitting data in a vehicle-communication network.

The present invention may be implemented in software and/or hardware.

Drawings

Other embodiments are described in detail with reference to the accompanying drawings. Wherein:

fig. 1 illustrates in a schematic diagram a vehicle-mounted data transmission device according to an embodiment of the invention;

fig. 2 shows a schematic representation of a method for transmitting data in a vehicle communication network by means of a data transmission device.

Detailed Description

Fig. 1 schematically shows an embodiment of a data transmission device 1 for transmitting data in a communication network 11 of a vehicle 12, which may be configured as a vehicle-to-environment information exchange (V2X) communication network. In accordance with the teachings of the present invention, the vehicle 12 may be considered herein as a first vehicle. The communication network 11 can be an integrated, fixed component of the (first) vehicle 12. The data transmission device 1 according to fig. 1 comprises a data receiving device 2 with an antenna device 13 for receiving data transmitted by a data transmitting device 15.

Here, the data transmission device 15 may be provided as another vehicle, which may also be referred to as the second vehicle 14. However, the data transmission device 15 can also be provided as an infrastructure device, for example a traffic light or a transmitting antenna, or as a communication device of a (moving) traffic participant, for example a pedestrian or a cyclist, which transmits messages or messages to the first vehicle 12 over an air interface.

According to the invention, the message or message transmitted from the data transmission device 15 to the data transmission device 1 is, for example, information about a position or a speed of the data transmission device 15, for example a vehicle or a pedestrian at a certain predetermined point in time.

The data transmission device 1 further comprises data processing means 3 for processing the received data, which data can be transmitted from the data receiving means 2 to the data processing means 3 via a first communication interface 4. As shown in fig. 1, the data processing device 3 is connected via a second communication interface 5 to a data application device 6 for transmitting the processed data. The data processing device 3 is provided here for filtering the received data on the basis of a predefined condition by means of a filter device 7, which can be regarded as a prefilter device.

As shown in fig. 1, the data processing device 3 comprises a processor 8. The data processing means 3 are arranged for generating, via the processor 8, from the filtered data, at least one data object with at least one parameter and for checking whether a status information of the at least one parameter of the at least one data object has changed at an earlier point in time with respect to a status information of the at least one parameter of the at least one data object. If this is the case, the data processing means 3 transmit or send the changed state information of the at least one parameter of the at least one data object to the data application means 6. In the sense of the present invention, an earlier point in time is a point in time or a query point in time at which so-called first state information of at least one parameter of at least one data object already exists. Since the condition of the technical component, for example the light condition of a vehicle lamp, changes occur, the changes occurring in the first state information relative to the second state information of the at least one parameter of the at least one data object are transmitted to the data application device 6. The second communication interface 5 CAN be designed as a Controller Area Network (CAN) communication bus system, which is economical to operate.

The data processing device 3 and the data application device 6 can be provided here as a single control device in the communication network 11 of the vehicle 12.

The data transmission device 1 may comprise a (first) storage means 9 for storing data. The data may include the generated data object generated by the data transmitted from the data transmitting apparatus 15 and received by the data receiving apparatus 2. However, such data may also be a message or message received by the data sending device 15 itself, which data is stored or temporarily stored for use at a later point in time, for example for generating one or more data objects.

The at least one data object may comprise a first data object and at least a second data object, which are transmitted by the data processing device 3 acting as a transmitter via the second communication interface 5 to the data application device 6 acting as a receiver.

The data processing device 1 is provided to transmit a so-called reference data object of the at least one data object to the data application device 6 if the data transmission device 1 determines that the generated at least one data object is transmitted to the data application device 6 for the first time. In this way, a complete data record of the data object generated in the data processing device 3 is placed in the data application device 6 and is stored, preferably in a predefined data format, in the (second) storage device 10 of a predefined data transmission device 1, wherein the data storage device 10 is located in the data application device 6. Here, the data format may be arranged to store transmitted data objects, for example a list or a table of ten data objects. It is thus sufficient to transmit, at a later point in time of transmission, only the changes in the status information of at least one parameter of at least one data object, which have been explained above, detected by the data processing means 3 to the data application means 6, which store these changes, also referred to as incremental information, or the latest information about one or more of the data objects concerned, respectively, for example in a data object list established by itself, or in a table. The respective parameter values of the reference data object stored in the data application device are updated by the transmitted change or delta information being overwritten.

In this way, each single data object can be unambiguously located at any time — also by other control devices of the vehicle 12. The transmission of the latest information or incremental information has the advantage that the transmission of the complete data record of all existing data objects, which has a very high bandwidth requirement, does not have to take place each time data is transmitted to the data application 6, nor is a communication bus, such as a Controller Area Network (CAN) bus, designed for this high bandwidth requirement. By data compression before the actual transmission in such a way that incremental information is compiled about the status information of at least one parameter of at least one data object, the data load to be transmitted is greatly reduced, whereby bandwidth is also saved.

In the transmission of the incremental information or the changed state information, the data objects or reference objects stored in the data application 6 are therefore always referenced. However, in order to ensure the robustness of the overall system, it is necessary to synchronize the data sets of the data objects periodically between the data processing device 3 and the data application device 6. This is achieved by transferring the complete data record, i.e. all available data to the created data object. The data processing device 3 can therefore be provided to transmit to the data application device 6, after a change in the status information of at least one parameter of a predefined number of at least one data object has been transmitted or after a predefined time duration, the current or an updated status information of at least one data object already stored in the storage device 9 of the data processing device 3 with respect to an earlier point in time or query point in time. In this sense, a complete record of the existing data objects and the status information of their parameters at a given time are sent to the data application means 6 for synchronization purposes.

This periodic transmission of the complete data record of the existing and/or newly provided data objects or of the incremental information of the individual data objects to the data application device 6 can be carried out on the basis of a clock signal generated by a clock generator (not shown in fig. 1) provided in the data transmission device 1, which clock signal is transmitted to the data processing device 3 for this purpose. In this case, the incremental information and the latest changed time interval for synchronizing or transmitting the individual parameter status information of the at least one data object can be set individually.

The at least one parameter of the at least one data object may comprise information about a location and/or a time specification and/or about the speed of the data transmission device 15.

In the temporal specification of the at least one parameter of the at least one data object, the changed state information may comprise a difference from the system time of the data transmission device 1. Thus, only one increment of the system time is transmitted to the data application 6, wherein the point in time at which data is available on the communication bus is available.

The changed state information of the at least one parameter of the at least one data object may represent the relative position of the data transmission device 15 at a defined point in time in a position specification. The data receiving means 2 of the data transmission device 1 can receive the position of the reception-related message time point data transmitting means 15 as a relative position. The transmission of an absolute position is of particular advantage if an absolute position has already been stored in the data application 6 together with an absolute time stamp in the table or list concerned, and the table comprises a corresponding time period, for example a few seconds. The data to be transmitted can then be referenced in the table.

In a speed specification of at least one parameter of at least one data object, the changed state information may represent the relative speed of the data transmission device 15 at a defined point in time.

The at least one parameter of the at least one data object may additionally comprise information about a state of a technical component of the data transmission device 15, for example a lamp state. In the transmission of a change as described above, only the corresponding change in the light state concerned is transmitted to the data application device 6, instead of transmitting the light states of all the vehicle lights.

Fig. 2 shows a schematic diagram of a method 100 for transmitting data using a data transmission device 1 in a communication network 11 of a vehicle 12, wherein the data transmission device 1 comprises a data reception device 2, a data processing device 3 connectable to the data reception device 2 via a first communication interface 4, and at least one data application device 6 connectable to the data processing device 3 via a second communication interface 5. The method 100 comprises a first step of receiving 101, via the data receiving device 2, data transmitted by the data transmitting device 15. The method 100 comprises a second step of filtering 102 the received data by the data processing device 3 on the basis of a predefined condition. The method 100 comprises a third step of generating 103 at least one data object from the filtered data by means of the data processing device 3, wherein the at least one generated data object has at least one parameter. The method 100 comprises a fourth step of checking 104 by the data processing device 3 whether a status information of at least one parameter of at least one data object has changed with respect to a status information of at least one of the parameters of at least one of the data objects at an earlier point in time. The method 100 comprises a fifth step of transmitting 105 the changed state information of the at least one parameter of the at least one data object to the data application device 6.

Description of the reference symbols

1 data transmission device

2 data receiving device

3 data processing device

4 first communication interface

5 second communication interface

6 data application device

7 Filter device

8 processor

9 memory device of data processing device

10 memory device of data application device

11 communication network

12 (first) vehicle

13 antenna device

14 second vehicle

15 data transmission device

100 method

101 reception of data

102 filtering of received data

103 generating at least one data object

104 are checked by the data processing means

105 transmission of altered state information