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Inherent power-over-data bus signaling for secure operating mode switching

  • US 9,948,508 B2
  • Filed: 06/24/2014
  • Issued: 04/17/2018
  • Est. Priority Date: 06/25/2013
  • Status: Active Grant
First Claim
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1. A method for changing an operating mode of a processing unit of a data network node for an aircraft, connected to a data communication and power supply line for providing data communication and for providing a supply voltage, the method comprising:

  • establishing a data communication connection of the processing unit of the data network node to another data network node or a server unit via the data communication and supply line wherein the data communication connection of the processing unit to the data communication and supply line is established via a data switch of the data network node;

    determining a change of the supply voltage of the data communication and power supply line by the processing unit;

    setting an operation mode of the processing unit based on the determined change of the power supply voltage; and

    exchanging, by an interface of the processing unit, data with application data services,wherein the setting of the operation mode of the processing unit comprises at least changing between a normal operation mode and a configuration mode,wherein the change between the normal operation mode and the configuration mode is set by triggering a change in voltage on the power supply line,wherein, in the normal operating mode, data is processed and/or forwarded according to requirements of connected services, andwherein, in the configuration mode, the device responds to configuration or administration instructions.

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