WO2016055570A1

WO2016055570A1 - Device and method for monitoring network communication of a data network for a motor vehicle

Info

Publication number: WO2016055570A1
Application number: PCT/EP2015/073264
Authority: WO
Inventors: Helge ZINNER
Original assignee: Continental Automotive Gmbh
Priority date: 2014-10-09
Filing date: 2015-10-08
Publication date: 2016-04-14
Also published as: DE102014220462A1

Abstract

The invention relates to a device (U) for monitoring network communication of a data network for a motor vehicle, wherein the device (U) comprises: an interface device (U1) that is designed to be coupled to at least one control device (ST1, ST2, ST3) of the data network; a monitoring device (U2) that is designed to capture data traffic of the control devices (ST1, ST2, ST3); and an analysis device (U3) that is designed to analyse the captured data traffic of the control devices (ST1, ST2, ST3).

Description

description

Device and method for monitoring Netzwerkkommunika ^¬ tion of a data network for a motor vehicle

The present invention relates to the monitoring of network ^¬ work and data communication. In particular, the present invention relates to an apparatus and method for monitoring network communication of a data network for a motor vehicle.

WO 02/45346 A1 describes a device for monitoring the operation of a network, comprising at least one network monitoring ^node . At least one network management node is maintained for client software applications to collect and store data sent or received by the client software applications as network traffic.

Ethernet describes a technology, software and hard ^¬ ware, such as logs, cables, distribution, Netzwerkkar ^¬ th specified for wired data networks, which was intended for ^¬ nally for local area networks (LAN) and is therefore also called LAN technology. Ethernet is also increasingly receiving large-scale entry into the on-board systems of motor vehicles.

Among other things, the standard Ethernet AVB and ^¬ future Ethernet TSN, plays an important role which, in contrast to standard Ethernet ensure guarantees for the maximum transmission time of packets. Ethernet AVB data is transmitted using the IEEE 1722 or IEEE 1733 protocol.

The Ethernet AVB Transport Protocol 1 IEEE 1722 is also of interest for use in motor vehicles. This protocol sends cyclic data about Ethernet based data. sending network. Typical transmission rates are 125 μβ ge ^¬ selected.

Ethernet is not a completely new network for the automatic controllers. This interface already exists, for example, in typical gateway controllers. With regard to the use of Ethernet AVB and the transport protocol IE ^¬ EE 1722 but for the first time high data rates and a very high message frequency.

If Ethernet is used as the backbone, gateways must package the messages from the various bus systems in the Ethernet and vice versa. This requires not only the analysis but also the reception and sending of Ethernet messages. If IEEE 1722 is used, then at present at least 8,000 packets / s are necessary for a data stream. Today's automotive processors would be fully utilized by sending and receiving the IEEE 1722 frames as the interrupt load becomes too high.

With regard to a vehicle electrical system for transporting sicherheitskri ^¬-Nazi data, such a problem is unacceptable. This leads to a static configuration of Bordnetzkommunika ^¬ tion.

Ethernet can send its data both by unicast and by multicast and on-board. But even this addressing is not fixed, because the switch or switch can change the recipient address in case of error.

For example, if a receiver is no longer addressable or reachable, the switch will broadcast a unicast addressed data stream to all. However, multicast and broadcast communication can not generally be avoided. because otherwise protocols like ARP or IEEE 802.1 AS will not work anymore.

It is an object of the present invention to provide an Improvement ^¬ te device and an improved method for monitoring network communication of a data network to provide for a motor driving ^¬ convincing.

This object is achieved by the independent claims ge ^¬ triggers. Embodiments and further developments can be taken from the dependent claims, the description and the figures.

A first aspect of the present invention relates to an on ^¬ device for monitoring of network communication of a data ^¬ network for a motor vehicle, the apparatus comprising: an interface device which is adapted to be coupled to at least one control device of the data network;

a monitoring device which is designed to detect data traffic ^¬ of the control units; and

an analysis device which is designed to analyze the detected data traffic of the control devices.

In other words, permits, the present invention ^¬ that a component centralized or distributed monitors the commu nication ^¬ in the data network of the motor vehicle, analyzed and recorded. Here, this component is placed in the data network of the motor vehicle and Da ^¬ tennetzwerk occurring data communication involved in. The component is ausges ^¬ tattet with the interfaces of the control unit and is installed either as an intermediate component, or reads the data by further inserted data lines. The task of the monitoring ^component is to receive and analyze the data traffic which is exchanged between the control units.

When unforeseen or atypical events occur, the monitoring ^component will intervene and / or generate an error message. The error message can in the simplest case represent the information about a malfunction and be distributed by the monitoring component. In addition, the monitoring component can actively intervene in the event to correct the malfunction of a control unit or to limit the damage.

According to a further, second aspect of the present invention, a data network for a motor vehicle is provided, wherein the data network comprises a device according to the first aspect of the present invention or according to any embodiment of the first aspect of the present invention.

According to another third aspect of the present invention, a method for monitoring network communication ei ^¬ nes data network is provided for a motor vehicle, the method comprising the steps of:

Capturing data traffic controllers means of a monitoring device and ^¬

Analyzing the detected data traffic of the control devices with ^{¬ means of} an analysis device.

In an advantageous embodiment of the present OF INVENTION ^¬ dung is provided that the apparatus is adapted to detect a malfunction of the control device based on the analysis of the data traffic of the control units. It can also include non-voreingeplante commu ^¬ nikationsdaten or non-vorprotokollierte data communication in the monitored traffic malfunctioning traffic. In a further advantageous embodiment of the present ^¬ the invention it is provided that the apparatus therefor is ^¬ sets to control based on the detected malfunction, the control ^¬ device.

In a further advantageous embodiment of the present ^¬ the invention it is provided that the device has an Ad ^¬ geneinrichtung and is adapted to output based on the detected malfunction an error message.

In a further advantageous embodiment of the present ^¬ the invention it is envisaged that the monitoring device is adapted to monitor mirrored data traffic of the control units.

In a further advantageous embodiment of the present ^¬ the invention it is provided that the monitoring means is adapted to forward the traffic of the mirrored data Steuerge ^¬ councils to the analyzing device.

Advantageous embodiments of the present invention are characterized in the subclaims.

The described embodiments and developments can be combined with each other as desired.

Further possible embodiments, further developments and implementa ^¬ tierungen the present invention also include non expli ^¬ zit Combinations of above or below bezüg ^¬ Lich of the embodiments described features of the OF INVENTION ^¬ dung.

The accompanying drawings are intended to provide further understanding of the embodiments of the present invention. The accompanying drawings illustrate embodiments and, together with the description, serve to explain concepts of the present invention.

Other embodiments and many of these benefits erge ^¬ ben in reference to the drawings. The illustrated elements of the drawings are not necessarily to scale ^¬ true to each other shown. Show it:

Fig. 1: a schematic representation of an apparatus for

Monitoring network communication of a data network ^¬ work for a motor vehicle according to an embodiment ^¬ form of the present invention;

Fig. 2 is a schematic representation of a flow chart of a method for monitoring Netzwerkkommuni ^¬ cation of a data network for a motor vehicle ge ^¬ Mäss another embodiment of the present invention;

3 shows a schematic representation of a device for

Monitoring of network communication of a data network ^¬ plant for a motor vehicle according to another ^¬ guide of the present invention;

Figure 4 is a schematic representation of a flow chart of a method for monitoring Netzwerkkommuni ^¬ cation of a data network for a motor vehicle ge ^¬ Mäss another embodiment of the present invention.

Fig. 5: a schematic representation of a flow chart of a method for monitoring a network ^¬ communication of a data network for a motor vehicle zeug according to another embodiment of the vorlie ^¬ ing invention;

Figure 6 is a schematic representation of a flow chart of a method for monitoring Netzwerkkommuni ^¬ cation of a data network for a motor vehicle ge ^¬ Mäss another embodiment of the present invention.

Fig. 7 shows a schematic representation of a flow chart of a method for monitoring Netzwerkkommuni ^¬ cation of a data network for a motor vehicle, and

Fig. 8: a schematic representation of an apparatus for

Monitoring of network communication of a data network ^¬ plant for a motor vehicle according to another ^¬ guide of the present invention.

In the figures of the drawings, like reference characters designate like or functionally identical elements, components, components or method steps, unless indicated otherwise.

1 shows a schematic representation of a Vorrich ^¬ device for monitoring network communication of a data network ^¬ plant for a motor vehicle according to an embodiment of the present invention.

Device U comprises, for example, a sectional location ^¬ direction Ul, a monitoring device U2 and an analysis ^¬ device U3.

The interface device Ul is, for example, to be ^¬ sets, with at least one control unit, as shown examples to be play also coupled to three control units STl, ST2, ST3, the Da ^¬ tennetzwerks 100th

The monitoring device U2 is designed, for example, to detect data traffic of the control devices ST1, ST2, ST3.

The analysis device U3 is designed, for example, to analyze the detected data traffic of the control devices ST1, ST2, ST3.

In the case of Ethernet AVB, TSN can be carried out before the actual commu ^¬ nication reservation of network capacity. That is, a transmitter S offers a receiver E, for example, a data stream with its traffic parameters, such as ^¬ example transmission frequency, message ^size or other parameters. Have the recipient and the participants on the path Zvi ^¬ rule transmitter and receiver, for example, enough resources for this particular data stream, he shall certify this and responds positively. The sender S begins only when the actual data is sent.

In the case of Ethernet AVB, for example, the monitor or the device U for monitoring in the communication of the controllers STL, ST2, ST3 can be integrated and thus also receive a reservation request.

This can be implemented by intermediate topologies or forwarding of the packets.

The monitoring device U thus reads, for example, the reservation requests of a sending control device and logs their characteristics such as a streaming class or a frame interval. Thus, the Device U for monitoring the timing of the data ^¬ capture current. In the case of AVB and IEEE 1722 8.000 packets per second at a transfer of a 16-bit 48 kHz stereo audio stream are example ^¬ as usual.

The apparatus U for monitoring stores So for this Since ^¬ data stream in a database that the data stream of Steuerge advises ^¬ 1 is transmitted to control unit 2 and a data rate of x Mbit / s caused or has a frequency of x kHz, about a data rate of 10 Mbit / s and a frequency of 8 kHz.

Fig. 2 illustrates a flow chart for explaining the ahead ^¬ invention. Shown are a transmitter S, a device U and a Emp ^¬ catcher E, the transmitter S and the receiver E may be formed as Steuerge ^¬ councils ST1, ST2, ST3 be.

In a first process section PI a reservation request from the station S over or through the Vorrich ^¬ processing U, and further to the receiver E is for example the ends. The device U itself is not part of this reservation path and only participates in the communication in reading. The receiver E responds, for example, with a positive reservation confirmation, which returns via the device U in the process section P2 to the transmitter S, in the process section P3, the transmitter S sends, for example, the data on the monitor U to the receiver E. This is done, for example, a recording the planned and the actual data communication via the device U.

For other bus systems such as CAN or LIN or for Ethernet, if the AVB / TSN protocol or similar is available on reservation. sierende drivers are not used, shall not be tried for example, before ^¬ ago, how much data is sent.

The device U can examine and classify the communication on the basis of a course.

The apparatus U records in a learning phase, for example end of tape programming or installation of a new STEU ^¬ ergerätes STl, ST2, ST3, the data traffic and classifies the recorded traffic.

Based on additional parameters, for example in the data ^¬ current, fixed or recurring identifiers are present, the device ka U tegorisiert the data stream.

The device U detects and determines, for example, when a data stream is typically sent and under what conditions.

For example, a Kom ^¬ communication between engine control and transmission is necessary with the turning of the ignition key, wel ^¬ che is not previously occurred. The vehicle runs example ^¬ reverses, then the reversing camera sends data to ^¬ show to the driver, but this does not happen in a pre ^¬'d be sfahrt.

These traffic characteristics can also be hard-coded by the system manufacturer.

3 shows a schematic representation of a Vorrich ^¬ device U.

The functional diagram of the device U includes beispielswei ^¬ se a classifier K, an action module A, a monitor module M, a Quality of Service Manager QoSM, a network manager NM, a memory Sp, a controller C, an analysis module AN, a history database HD and a decision maker En.

Furthermore, the monitoring device comprises, for example, a multiplicity of network interfaces NS.

FIG. 4 shows a schematic representation of a Flussdia ^¬ program of a method for monitoring Netzwerkkommunikati ^¬ on a data network 100 for a motor vehicle according to an embodiment of the present invention.

The method includes, for example, the following steps:

As a first step, detection S01 of data traffic of the control devices ST1, ST2, ST3 takes place by means of a monitoring ^device U2.

As a second step, an analysis S02 of the detected data traffic of the control devices takes place by means of an analysis device U3.

FIG. 5 shows a schematic representation of a method for monitoring network communication of a data network

100 for a motor vehicle.

As a first step of the method, read-through Sl of the data communication is performed by the device U for monitoring network communication. As a second step of the method, a creation S2 of communication profiles with additional parameters takes place. To ^¬ sätzlichen parameters may include, for example: a Kom ^¬ communication relationship, a time, a duration, a data rate, a peak rate, a minimum rate, a vehicle condition, an outside temperature, a speed or a driving situation. As a further third step of the process, a game S3 analyzing and checking the communication ^¬ profile is carried out at ^¬.

As a fourth method step, for example, a saving S4 of the communication profiles.

FIG. 6 illustrates a method for monitoring network communication of a data network for a motor vehicle.

In a step Sil, a request is made to reserve ei ^¬ nes data traffic. In a step S12, a positive Reservierungsant ^¬ word.

In a step S12a a query is made as to whether the data transmission ^¬ has been identified. If not, step S12a is repeated.

If so, in a step S13, a recording meh ^¬ eral messages to identify the Verkehrscharakteris ^¬ tics.

In a step S14, an analysis and classification of the data traffic takes place.

In step S14a, a query is made whether the detected traffic characteristic coincides with the pre-agreed transport saddle ^¬ rakteristik. If so, the process continues with step S12a for identifying a new data transfer. If not, an error message is made in step S15. When you made in step S14 analysis and CLASSIFICA ^¬ tion also query the data stream from a database DB can be done. Likewise, synchronization with a database DB can take place in steps S11 and S12.

FIG. 7 shows a flow diagram of a method for monitoring network ^{communication} of a data network for a motor vehicle according to a further ^exemplary embodiment of the present invention.

FIG. 7 illustrates an image of a flow chart of a Ver ^¬ driving, in which a recording and detection of changes in data communication takes place, if this was not previously negotiated.

In a step S12A, for example, a query is made as to whether a data transmission is visible.

In a step S13 is carried out, for example, if it is a draw on ^¬ multiple messages to identify the Ver ^¬ traffic characteristics. If the query in step S12 was negative, step S12A is repeated.

In a step S14, a search for the Ver ^¬ traffic characteristics to previously recorded data, for example, takes place.

This step S14 can take a query in a database DB ^¬ . In a step S14A, for example, a query is made whether the previously recorded traffic characteristic matches the stored ge ^¬ traffic characteristics. If no, for example, an error message occurs in the

Step S15. If so, the step S12a, for example, be ^¬ repeated züglich a new data transfer.

Fig. 8 shows a schematic representation of a data network 100 with an apparatus for monitoring Netzwerkkom ^¬ munication a data network and three control devices STl, ST2, ST3.

The data network previously comprises a switch SW which is inserted between the control units ST1, ST2, ST3. The pre ^¬ U direction for monitoring is not visible for ECU STI, ST2, ST3. In the switch SW, the entire data traffic is mirrored, and the switch SW is designed to ^forward the mirrored data traffic to the device U.

In this case, the switch SW can be in the unit U integrated ^¬ to or formed as a separate network component of the network data ^¬ 100th

Although the present invention has been described above with reference to preferred Ausfüh ^¬ insurance examples, it is not dar ^¬ on limited, but modifi ^¬ ed in many ways. In particular, the present invention can be varied or modified in a variety of ways without departing from the gist of the present invention.

In addition it should be noted that "comprising" and "aufwei ^¬ send" does not exclude other elements or steps and "egg ne" or "one" does not exclude a plurality. It should also be noted that features or steps which have been with reference to one of the above embodiments beschrie ^¬ ben, also in combination with other features or steps of other exemplary embodiments described above ver ^¬ turns can be. Be train sign in the claims are not to be regarded as a restriction.

Claims

Device (U) for monitoring network communication of a data network for a motor vehicle, the device (U)

- an interface device (UI), which is set to from ^¬ to be coupled of the data network with at least one control device (STl, ST2, ST3);

- A monitoring device (U2), which is designed ^¬ to detect traffic of the control units (STl, ST2, ST3); and

- An analysis device (U3), which is adapted to analyze the detected data traffic of the control units (STl, ST2, ST3).

Device according to claim 1, wherein the device is designed to detect a malfunction of the control devices (ST1, ST2, ST3) based on the analysis of the data traffic of the control devices (ST1, ST2, ST3).

Apparatus according to claim 2, wherein the device is adapted to control based on the detected malfunction, the control devices (STL, ST2, ST3).

Device according to claim 2 or 3, wherein the device comprises a display device and is designed to output based on the detected malfunction an error indication ^¬ dung.

Device according to one of the preceding claims 1 to 4, wherein the monitoring device (U2) is adapted to detect mirrored data traffic of the control devices (STl, ST2, ST3). Device according to claim 5, wherein the monitoring device (U2) is designed to forward the mirrored data traffic of the control devices (ST1, ST2, ST3) to the analysis ^device (U3).

Data network (100) for a motor vehicle, said Since ^¬ tennetzwerk comprises a device (1) according to one of claims 1 to vorherge Henden. 6

Data network (100) according to claim 7, wherein the data network comprises a plurality of control devices (STl, ST2, ST3) to summarizes ^¬.

A method of monitoring network communication of a data network (100) for a motor vehicle, the method comprising the steps of:

- Detecting (S01) data traffic of the control units

(ST1, ST2, ST3) by means of a monitoring device (U2) and

- Analyze (S02) the detected traffic of the

Control devices (STl, ST2, ST3) by means of a Analysein ^¬ direction (U3).

A program element which, when it is ^¬ leads on a processor instructs the processor to perform the method of claim. 9