DEVICE FOR MONITORING THE TIME AND VEHICLE-TO-X-COMMUNICATION MODULE

• US 20180034825A1
• Filed: 07/28/2017
• Published: 02/01/2018
• Est. Priority Date: 08/01/2016
• Status: Active Grant

• Current Assignee: Continental Teves AG & Co. OHG (Continental AG)
• Original Assignee: Continental Teves AG & Co. OHG (Continental AG)
• Inventors: Bruechle, Michael, Menzel, Marc, Sthlin, Ulrich
• Granted Patent: US 10,594,726 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/14 Time supervision arrangements, e.g. real time clock
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24
• CPC Class Codes: G06F 21/52 during program execution, e.g. stack integrity ; Preventing unwanted data erasure; Buffer overflow
• CPC Class Codes: G06F 2221/2151 Time stamp
• CPC Class Codes: H04L 63/1408 by monitoring network traffic monitoring network traffic per se H04L43/00
• CPC Class Codes: H04L 63/1466 Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks
• 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
• CPC Class Codes: H04W 12/12 Detection or prevention of fraud
• CPC Class Codes: H04W 4/024 Guidance services
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]

Abstract

A device for monitoring the time during an interruption period is presented, wherein a continually decaying state is observed. In addition, a vehicle-to-X-communication module having such a device is also presented.

Claims

1. A vehicle-to-X-communication module which comprises a device for monitoring the time during an interruption period in order to monitor a time during a failure of a power supply to the vehicle-to-X-communication module, wherein the device comprises:

a storage unit which is configured to store a time at the start of the interruption period,

a decay unit which produces a continually decaying state over the interruption period,

a measuring unit which is configured to measure the state at least at the end of the interruption period, and

a control unit which is configured to generate a duration measure which is indicative of the length of the interruption period on the basis of the measured state at the end of the interruption period.

2. The vehicle-to-X-communication module according to claim 1, wherein the interruption period corresponds to the length of time of a power failure.

3. The vehicle-to-X-communication module according to claim 1, wherein the decay unit is an electrical capacitor and the decaying state is a voltage dropping across the capacitor.

4. The vehicle-to-X-communication module according to claim 3, wherein the capacitor is wired up to at least one resistor so that a time constant of the decaying voltage can be adjusted by means of the capacitor and/or the resistor.

5. The vehicle-to-X-communication module according to claim 1, wherein the measuring unit is configured to also measure the state at the start of the interruption period, and

the control unit is configured to also measure the duration measure on the basis of the measured state at the start of the interruption period.

6. The vehicle-to-X-communication module according to claim 1, wherein the control unit is configured to trigger a measurement of the state at the start and/or at the end of the interruption period.

7. The vehicle-to-X-communication module according to claim 1, wherein the device comprises a plurality of decay units which each produce continually decaying states.

8. The vehicle-to-X-communication module according to claim 7, wherein the decay units produce states with different time constants of the decay.

9. The vehicle-to-X-communication module according to claim 7, wherein each decay unit comprises its own measuring unit, or the measuring unit is configured to measure the states of all of the decay units.

10. The vehicle-to-X-communication module according to claim 7, wherein the control unit is configured to generate a respective duration measure for each decay unit on the basis of a number of measurements of the respective state.

11. The vehicle-to-X-communication module according to claim 7, wherein the states of the decay units have different dependences on a number of parameters.

12. The vehicle-to-X-communication module according to claim 11, wherein the parameters are temperature, air humidity, radiation, and/or air pressure.

13. The vehicle-to-X-communication module according to claim 7, wherein the control unit is configured to generate an averaged or common duration measure across all the states of the decay units.

14. The vehicle-to-X-communication module according to claim 1, wherein at least one decay unit produces a state with a time constant between 0.5 hours and 2 hours.

15. The vehicle-to-X-communication module according to claim 1, wherein the control unit is configured to generate an initialization time for the end of the interruption period on the basis of the time stored at the start of the interruption period and a number of duration measures.