Control device for a vehicle network and method for operating a vehicle network

Abstract

A control device for a vehicle network, having a microprocessor and a transceiver. The control device can be switched off or switched to a sleep mode during a previously defined state or event during the operation of the motor vehicle and/or the control device can be awakened from the sleep mode during a previously defined state or event during the operation. The disclosed embodiments also relate to a method for operating a vehicle network.

1 . A control device for a vehicle network that includes at least one bus system, the control device comprising:
 a microprocessor;   a transceiver; and   a module that detects network messages that include vehicle velocity data, the network messages being transmitted on at least one bus system, the module controlling at least one of switching on or off of a sleep mode for the control device based on content of the detected network messages,   wherein the content indicates a previously defined state or event during the operation of the motor vehicle,   wherein the control device is switched off or into a sleep mode based on detection of the previously defined state or event during the operation of the motor vehicle, and   wherein the previously defined state is the vehicle velocity V, wherein if V>V limit , the control device is switched off or switched into the sleep mode.   
     
     
         2 . The control device as claimed in  claim 1 , wherein the event that triggers switching the control device into the sleep mode or for switching off or for awakening is receipt of at least one network message. 
     
     
         3 . The control device as claimed in  claim 1 , wherein the module is connected on an input side to an output of a receiver of the transceiver and on an output side to the microprocessor or a control logic of the transceiver or a driver of the transceiver. 
     
     
         4 . The control device as claimed in  claim 1 , wherein the module is integrated into the transceiver or into the microprocessor or is embodied as a separate component. 
     
     
         5 . The control device as claimed in  claim 4 , wherein the module is integrated into the microprocessor and a coprocessor function of the microprocessor is executed by the module if a sleep mode of the microprocessor is activated,
 wherein, in the coprocessor function, the module carries out a transmitting operation or a receiving operation or an evaluation of reception messages or a changeover of operating mode.   
     
     
         6 . The control device as claimed in  claim 1 , wherein the module comprises at least one data mask (M_data) or at least one DLC mask (M_DLC) or at least one identifier mask (M_id 1 , M_id 2 , M_idn). 
     
     
         7 . The control device as claimed in  claim 1 , wherein the module comprises at least one input and output interface (I/O), wherein external signals are received or transmitted by the input and output interface (I/O). 
     
     
         8 . The control device as claimed in  claim 1 , wherein the module comprises at least one output interface (DA 1 ) for outputting signals to external voltage controllers or at least one output interface (DA 2 ) for outputting signals for controlling the transceiver. 
     
     
         9 . The control device as claimed in  claim 1 , wherein the module comprises at least one time out timer (T 1 , T 2 , T 3 ), wherein an operating mode is switched over if the time out timers (T 1 , T 2 , T 3 ) reach a predetermined value or 0. 
     
     
         10 . The control device as claimed in  claim 1 , wherein the module comprises at least one counter (C), wherein an operating mode is switched over if the counter (C) reaches a predetermined value. 
     
     
         11 . The control device as claimed in  claim 1 , wherein the module comprises at least one reception buffer (EB 1 , EB 2 , EBn) or at least one transmission buffer (SB 1 , SBn), wherein messages are received by the reception buffer (EB 1 , EB 2 , EBn) or messages are transmitted by the transmission buffer (SB 1 , SBn). 
     
     
         12 . A method for operating a vehicle network that includes at least one bus system that includes a plurality of control devices, each control device comprising a microprocessor, and a transceiver, the method comprising:
 detecting a network message including vehicle velocity data, the network message being transmitted on the at least one bus system using a network message detection module;   controlling at least one of switching on or off of a sleep mode for at least one control device of the plurality of control devices based on content of the detected network messages that indicates a previously defined state or event during motor vehicle operation; and   switching off the at least one control device or switching the at least one control device into a sleep mode based on detection of the previously defined state or event during operation of the motor vehicle,   wherein the previously defined state is the vehicle velocity V, wherein if V>V limit , at least one control device is switched off or switched into the sleep mode.   
     
     
         13 . The method as claimed in  claim 12 , wherein a master control device transmits, as an event, a network message as a function of which at least one control device is switched off or switched into the sleep mode or awakened. 
     
     
         14 . The control device of  claim 1 , wherein the control device is awakened from the sleep mode or switched on based on detection of the previously defined state or event during the operation of the motor vehicle. 
     
     
         15 . The method of  claim 12 , further comprising switching on the control device or waking up the control device from the sleep mode based on detection of the previously defined state or event during operation of the motor vehicle. 
     
     
         16 . A control device for a vehicle network of a motor vehicle, the vehicle network including at least one bus system, the control device comprising:
 a microprocessor;   a transceiver; and   a module that detects transmitted network messages that include vehicle velocity data, the network messages being transmitted on the at least one bus system,   wherein the control device is switched on or off of a sleep mode based on content of a detected network messages, wherein the content of the detected network message indicates a previously defined state or event during the operation of the motor vehicle,   wherein the control device is switched off or into a sleep mode in response to detection of a specific previously defined state or event during the operation of the motor vehicle,   wherein the control device is switched off or into the sleep mode if:   the previously defined state is the motor vehicle velocity and the detected velocity is greater than a specified velocity limit.