CONTROL DEVICE FOR CONNECTING A CAN BUS TO A RADIO NETWORK, AND MOTOR VEHICLE HAVING SUCH A CONTROL DEVICE

• US 20160294725A1
• Filed: 03/30/2016
• Published: 10/06/2016
• Est. Priority Date: 04/02/2015
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Maise, Timo, Behrendt, Paul, Schneider, Kai
• Granted Patent: US 10,038,570 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 12/40202 by using a plurality of master stations
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

Abstract

A control device and corresponding motor vehicle for connecting a CAN bus to a radio network, having the following features: the control device includes a wireless controller, a microcontroller, a programmable logic module and a CAN transceiver; the microcontroller is connected, on the one hand, to the wireless controller and, on the other hand, to the logic module; the CAN transceiver is connected, on the one hand, to the logic module and, on the other hand, to the CAN bus; a data stream to the microcontroller corresponds to a data stream from the CAN transceiver; and the logic module is configured in such a manner that it monitors a data stream from the microcontroller which is addressed to the CAN transceiver and, on the basis of a data frame contained in the data stream from the microcontroller, suppresses at least this data frame.

Claims

1. A control device for connecting a CAN bus to a radio network, said control device comprising:

a wireless controller, a microcontroller, a programmable logic module and a CAN transceiver,

the microcontroller is connected to the wireless controller and the logic module,

the CAN transceiver is connected to the logic module and to the CAN bus,

a first data stream to the microcontroller corresponds to a second data stream from the CAN transceiver, and

the programmable logic module is configured to monitor a third data stream from the microcontroller which is addressed to the CAN transceiver and, on the basis of a data frame contained in the first data stream from the microcontroller, the programmable logic module suppresses at least said data frame.

2. The control device as claimed in claim 1, wherein the logic module has a decision-making logic device which is fed by the first data stream from the microcontroller.

3. The control device as claimed in claim 2,

wherein the CAN transceiver has a control input in order to either release a fourth data stream to the CAN transceiver by way of a release signal for the CAN bus or to block the release signal by way of a blocking signal for the CAN bus, and

wherein the logic module is configured to provide the blocking signal on the basis of the data frame.

4. The control device as claimed in claim 3, wherein the logic module is configured to monitor the second data stream from the CAN transceiver and temporarily provide the release signal on the basis of a data frame contained in the second data stream from the CAN transceiver.

5. The control device as claimed in claim 4, wherein the logic module is configured to provide the release signal when the data frame comprises a diagnostic request.

6. The control device as claimed in claim 3, wherein the CAN transceiver is configured in such a manner that the blocking signal changes the CAN transceiver to an operating state in which the CAN transceiver still receives data frames via the CAN bus.

7. The control device as claimed in claim 3, wherein the CAN transceiver is configured in such a manner that the blocking signal changes the CAN transceiver to a stand-by operating state.

8. The control device as claimed in claim 3, wherein the CAN transceiver is configured in such a manner that the blocking signal disconnects the CAN transceiver.

9. The control device as claimed in claim 3, wherein the logic module has a logic gate in order to either release the fourth data stream to the CAN transceiver by way of a dominant signal level or to block the fourth data stream by way of a recessive signal level, and

the logic module is configured to set the recessive signal level on the basis of the data frame.

10. A motor vehicle having the control device as claimed in claim 1.