IN-VEHICLE UNIT COMMUNICATION PROTOCOL

• US 20080192659A1
• Filed: 02/14/2007
• Published: 08/14/2008
• Est. Priority Date: 02/14/2007
• Status: Active Grant

• Current Assignee: Audiovox Corporation (VOXX International Corporation)
• Original Assignee: Audiovox Corporation (VOXX International Corporation)
• Inventors: Santavicca, Joseph
• Granted Patent: US 7,885,603 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol
• CPC Class Codes: H04L 1/0061 Error detection codes

Abstract

A vehicle control system communication method, including: receiving, at an in-vehicle unit (IVU), a command message from a hand-held unit (HHU), wherein the command message includes a first command frame and a second command frame; and sending, from the IVU, a response message to the HHU, wherein the response message includes a first response frame, wherein the first response frame is sent in a time period between the reception of the first command frame and the reception of the second command frame.

Claims

1. A vehicle control system communication method, comprising:

receiving at an in-vehicle unit (IVU), a command message from an hand-held unit (HHU), wherein the command message includes a first command frame and a second command frame; and

sending, from the IVU, a response message to the HHU, wherein the response message includes a first response frame, wherein the first response frame is sent in a time period between the reception of the first command frame and the reception of the second command frame.

2. The method of claim 1, wherein the time period between the reception of the first command frame and the reception of the second command frame is approximately 100 ms or approximately 150 ms.

3. The method of claim 1, wherein the first response frame is sent approximately 50 ms or approximately 75 ms after the first command frame is received.

4. The method of claim 1, wherein when the command message further includes a third command frame, the response message includes a second response frame, wherein the second response frame is sent in a time period between the reception of the second command frame and the reception of the third command frame.

6. The method of claim 4, wherein the second response frame is sent approximately 50 ms or aproximately 75 ms after the second command frame is received.

7. The method of claim 1, further comprising:

receiving, at the HHU, the response message from the IVU.

8. The method of claim 7, wherein when the IVU receives the first command frame from the HHU a communication session begins and when the HHU receives a last response frame from the IVU the communication session ends.

9. The method of claim 8, wherein when the communication session ends, the HHU does not receive another response message form the IVU until another communication session begins.

10. The method of claim 1, further comprising:

resending, from the IVU, the response message until the IVU receives another command message from the HHU.

11. The method of claim 1, further comprising:

validating, at the IVU, a learn command message received from the HHU or a valid setup request from an HHU already learned, by sending, from the IVU, a series of calibration frames to the HHU.

12. The method of claim 11, wherein the series of calibration frames is sent approximately 100 ms or approximately 150 ms apart.

13. The method of claim 1, wherein the command message and the response message are wirelessly transmitted using a radio frequency (RF), ZigBee, Near Field Communications (NFC), Bluetooth, ultra-wide band or infrared technique.

5. The method of claim 5, wherein the time period between the reception of the second command frame and the reception of the third command frame is approximately 100 ms or approximately 150 ms.

14. A vehicle control system, comprising:

a hand held unit (HHU) for transmitting a command message, wherein the command message includes a first command frame and a second command frame; and

an in-vehicle unit (IVU) for receiving the command message and sending a response message to the HHU, wherein the response message includes a first response frame, wherein the first response frame is sent in a time period between the reception of the first command frame and the reception of the second command frame.

15. The system of claim 14, further comprising:

a vehicle control module for receiving a command from the IVU associated with the command message received from the HHU and for instructing vehicle components to execute functions in accordance with the command received form the IVU.

16. The system of claim 15, wherein the vehicle control module communicates with the vehicle components via a vehicle data bus.

17. The system of claim 16, wherein the vehicle data bus is a controller area network (CAN) data bus.

18. The system of claim 15, wherein a vehicle component executes a function in accordance with the command received from the IVU in response to the instruction of the vehicle control module.

19. The system of claim 14, wherein the IVU instructs the vehicle components to execute functions associated with the command message received from the HHU.

20. The system of claim 19, wherein the IVU communicates with the vehicle components via a vehicle data bus.

21. The system of claim 20, wherein the vehicle data bus is a CAN data bus.

22. The system of claim 19, wherein a vehicle component executes a function associated with the command message received from the HHU in response to a command received from the IVU.

23. The system of claim 14, wherein when the IVU is hardwired to vehicle components, the IVU instructs the vehicle components to execute functions associated with the command message received from the HHU via the hardwired connection.

24. The system of claim 23, wherein a vehicle component executes a function associated with the command message received from the HHU in response to a command received from the IVU via the hardwired connection.

25. The system of claim 14, wherein the command message and the response message are wirelessly transmitted using a radio frequency (RF), ZigBee, Near Field Communication (NFC), Bluetooth, ultra-wide band or infrared technique.

26. A method for wirelessly communicating between a remote transceiver and a vehicle control system, comprising:

receiving, at a vehicle control unit, a command message from a remote transceiver, wherein the command message includes a first command frame and a second command frame; and

sending, from the vehicle control unit, a response message to the remote transceiver, wherein the response message includes a first response frame, wherein the first response frame is interleaved between the first command frame and the second command frame.