Method,device and bus manager for operating a device that is connected to a motor vehicle communications network
First Claim
1. A method of operating a device which is connected to a vehicle communications network, the method comprising:
- detecting, using a bus manager that is connected to the device via the vehicle communications network, that data communication with the device in a switched-off state is necessary, the device in the switched-off state lacking the capacity to receive data sent over a data line; and
subsequently reactivating the switched-off device by the bus manager via a frequency pulse transmitted over a power supply line.
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Accused Products
Abstract
A method of operating a device which is connected to a vehicle communications network is described, a switched-off device being reactivated by the bus manager via a frequency pulse transmitted over a power supply line. The device may be switched off by the bus manager or by itself if there is no data communication with the device for a predetermined period of time. The frequency pulse is analyzed by an analyzer circuit of the switched-off device, the analyzer circuit having a frequency-selective filter and a threshold detector. The frequency pulse may be transmitted at a frequency which is valid for only one device or at a frequency for a group of devices or at a frequency for all devices. If the devices are arranged in branches, then all the devices downstream from a switched-off device are also switched off or reactivated.
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Citations
10 Claims
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1. A method of operating a device which is connected to a vehicle communications network, the method comprising:
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detecting, using a bus manager that is connected to the device via the vehicle communications network, that data communication with the device in a switched-off state is necessary, the device in the switched-off state lacking the capacity to receive data sent over a data line; and subsequently reactivating the switched-off device by the bus manager via a frequency pulse transmitted over a power supply line. - View Dependent Claims (2)
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3. A method of operating a device which is connected to a vehicle communications network, the method comprising:
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detecting, using a bus manager, that data communication with the device in a switched-off state is necessary; subsequently reactivating the switched-off device by the bus manager via a frequency pulse transmitted over a power supply line; comparing the frequency pulse with a threshold value by an analyzer circuit of the switched-off device; and reactivating the switched-off device when a signal power of the frequency pulse exceeds the threshold. - View Dependent Claims (4, 5, 6, 7)
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8. A device comprising:
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an arrangement for connecting to a communications network; an analyzer circuit connected to a power supply line, the analyzer circuit including a frequency-selective filter and a threshold detector, wherein; the analyzer circuit is configured to reactivate the device when a frequency pulse transmitted over the power supply line is present, and the device in a switched-off state lacks the capacity to receive data sent over a data line.
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9. A bus manager comprising:
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means for detecting that data communication with a device in a switched-off state is necessary, the device being connected to the bus manager via a vehicle communications network, the device in the switched-off state lacking the capacity to receive data sent over a data line; and means for subsequently reactivating the switched-off device via a frequency pulse transmitted over a power supply line. - View Dependent Claims (10)
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Specification