DATA TRANSMISSION METHOD AND DATA RECEPTION METHOD BETWEEN CONTROLLERS IN VEHICLE NETWORK

• US 20150215125A1
• Filed: 12/02/2014
• Published: 07/30/2015
• Est. Priority Date: 01/29/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: PARK, Sung Joon
• Granted Patent: US 9,900,388 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 21/85 interconnection devices, e.g. bus-connected or in-line devices
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: H04L 2209/84 Vehicles
• 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: H04L 9/065 Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3

Abstract

A method for transmitting data between controllers in a vehicle network includes transmitting a first data code including an identification number. A second data code is transmitted including a length value of data codes to be transmitted. Data codes are transmitted by using the length value of the data codes to be transmitted. A random number and a position information value of the data codes to be transmitted are included in last and previously transmitted data codes.

Claims

1. A method for transmitting data between controllers in a vehicle network, the method comprising:

transmitting a first data code including an identification number;

transmitting a second data code including a length value of data codes to be transmitted; and

transmitting data codes by using the length value of the data codes to be transmitted,

wherein, a random number and a position information value of the data codes to be transmitted are included in last and previously transmitted data codes.

2. The method of claim 1, further comprising:

determining the length value and the position information value of the data codes by substituting the random number into an encryption function.

3. The method of claim 1, further comprising:

determining the random number by substituting the length value of the data codes and the position information value of the data codes to be transmitted into the encryption function.

4. The method of claim 1, wherein the transmitting of the data codes by using the length value of the data codes to be transmitted includes adding an arbitrary value to a data code except a portion of the data codes including information to be used in a controller to receive the data codes, a portion of the data codes including a random number, and a portion of the data codes including a position information value of the data codes.

5. The method of any one of claim 1, wherein the identification number is an identification number related to engine control of a vehicle, an identification number related to steering of the vehicle, or an identification number related to braking of the vehicle.

14. The method of claim 1, further comprising:

determining, based on the random number and the position information value of the data codes, whether the received data codes are normal or abnormal; and

when normal data codes are received after abnormal data codes are received, determining the reception of the abnormal data codes as a past error and receiving the normal data code.

6. A method for receiving data between controllers in a vehicle network, the method comprising:

receiving, from a controller, data codes including a length value of data codes;

extracting the length value of data codes from the received data codes;

extracting a position information value of the received data codes from a previous data code of last transmitted data codes;

extracting a random number from the last transmitted data codes;

calculating a length value of the received data codes and a position information value of the received data codes;

comparing the calculated length and position information values of the received data codes with the extracted length value and position information value; and

converting an arrangement of the received data codes into an arrangement of data codes which the controller in the vehicle network recognizes, using the extracted length and position information values, when the calculated length and position information values are equal to the extracted length and position information values, respectively.

7. The method of claim 6, wherein, the calculating of the length and position information values of the received data codes includes calculating the length and position information values of the received data codes by substituting the extracted random number into an encryption function.

8. The method of claim 6, wherein, the calculating of the length and position information values of the received data codes includes calculating the length and position information values of the received data codes by substituting the extracted random number into an inverse encryption function.

9. The method of claim 7, wherein, the comparing of the calculated length and position information values of the received data with the extracted length and position information values of the data codes includes disregarding the received data codes and not performing a subsequent process, when the calculated length and position information values of the received data are different from the extracted length and position information values of the data codes, respectively.

10. The method of claim 9, further comprising generating an error code and transmitting the error code to other controllers, when the case where the calculated length and position information values of the received data are different from those of the data codes, extracted from the received data code, respectively, remains for a predetermined time or more.

11. The method of any one of claim 6, wherein an identification number related to engine control of a vehicle, an identification number related to steering of the vehicle, or an identification number related to braking of the vehicle is included in the firstly received data code among the received data codes.

15. The method of claim 6, further comprising:

determining, based on the calculated length and position information values and the extracted length and position information values, whether the received data codes are normal or abnormal; and

when normal data codes are received after abnormal data codes are received, determining the reception of the abnormal data codes as a past error and receiving the normal data code.

12. A method for receiving data between controllers in a vehicle network, the method comprising:

receiving, from a controller, data codes including a length value of data codes;

extracting the length value of data codes from the received data codes;

extracting a position information value of the received data codes from f the last transmitted data codes;

extracting a random number by substituting the length value of the received data codes into an encryption function;

calculating a length value of the received data codes and a position information value of the received data codes;

comparing the calculated length and position information values of the received data with the extracted length value and position value; and

converting an arrangement of the received data codes into an arrangement of data codes which the controller in the vehicle network recognizes, using the extracted length and position information values of the data codes, when the calculated length and position information values of the received data are equal to the extracted length and position information values, respectively.

13. The method of claim 12, wherein, the extracting of the random number by substituting the length value of the received data codes into an encryption function includes extracting the random number by substituting length values of data codes received for a predetermined time into the encryption function in a received sequence.

16. The method of claim 12, further comprising:

determining, based on the calculated length and position information values and the extracted length and position information values, whether the received data codes are normal or abnormal; and

when normal data codes are received after abnormal data codes are received, determining the reception of the abnormal data codes as a past error and receiving the normal data code.