System and method for two-way remote activation with adaptive protocol

• US 9,047,716 B1
• Filed: 09/28/2006
• Issued: 06/02/2015
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Ghabra, Riad, King, Ronald O., Nantz, John S., Tang, Tom Q., Luo, Yi
• Primary Examiner(s): YANG, JAMES J
• Application Number:
  US11/536,209
• Time in Patent Office: 3,169 Days
• Field of Search: 340/825, 340 51- 52, 340 56- 572, 340/825.69
• US Class Current: 1/1
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 2209/10 Comprising means for protocol conversion, i.e. format conversion
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

In one embodiment of a system and method for remote activation of a device includes, a transceiver is provided for transmitting a command signal according to a first transmission protocol having a first data rate, receiving an acknowledgment signal indicating that the command signal transmitted according to the first transmission protocol has been received, and transmitting the command signal according a second transmission protocol, the second transmission protocol having a second data rate less than the first data rate and including partition of the command signal. A controller is provided for selecting the first transmission protocol for use in transmitting the command signal in response to a user input, and selecting the second transmission protocol for use in transmitting the command signal when the transceiver fails to receive the acknowledgment signal.

Claims

1. A system for remote activation of a device, the system comprising:

a remote unit comprising

a transceiver for wirelessly transmitting a command message according to a first transmission protocol, receiving a wireless acknowledgment signal indicating that the command message transmitted according to the first transmission protocol has been received, and wirelessly transmitting the command message according to a second transmission protocol comprising partitioning of the command message into a plurality of packets such that each packet includes a portion of the command message less than a complete command message, each packet for separate transmission by the transceiver, and

a controller for selecting the first transmission protocol for use in transmitting the command message in response to a user input, and for selecting the second transmission protocol for use in transmitting the command message when the transceiver fails to receive the acknowledgment signal after transmission of the command message according to the first transmission protocol.

2. The system of claim 1 further comprising a device unit for receiving the command message transmitted by the remote unit transceiver, and transmitting the acknowledgment signal after receipt of the command message transmitted according to the first transmission protocol.

3. The system of claim 1 wherein the first transmission protocol comprises a first data rate and the second transmission protocol further comprises a second data rate less than the first data rate.

4. The system of claim 1 wherein the device comprises a vehicle engine.

5. The system of claim 1 wherein the first transmission protocol comprises a first modulation scheme, and the second transmission protocol further comprises a second modulation scheme different than the first modulation scheme.

6. The system of claim 1 further comprising a device unit, the device unit comprising:

a transceiver for receiving the plurality of packets transmitted by the remote unit transceiver when the second transmission protocol is selected, receiving the command message transmitted by the remote unit transceiver when the first transmission protocol is selected, and transmitting the acknowledgment signal; and

a controller for assembling the plurality of packets into the complete command message when the second transmission protocol is selected.

7. The system of claim 6 wherein the device comprises a vehicle engine.

8. A system for remote activation of a device, the system comprising:

a device unit comprising

a transceiver for receiving a wireless command message transmitted by a remote unit according to one of a first transmission protocol and a second transmission protocol comprising partitioning of the command message into a plurality of packets such that each packet includes a portion of the command message less than a complete command message, each packet for separate transmission by the remote unit, and transmitting a wireless acknowledgment signal, and

a controller for controlling the transceiver to transmit the acknowledgment signal after receipt of a command message transmitted by the remote unit according to the first transmission protocol.

9. The system of claim 8 wherein the first transmission protocol comprises a first modulation scheme, and the second transmission protocol further comprises a second modulation scheme different than the first modulation scheme.

10. The system of claim 8 wherein the transceiver receives the plurality of packets transmitted by the remote unit according to the second transmission protocol and the controller assembles the plurality of packets into the complete command message.

11. The system of claim 8 wherein the first transmission protocol comprises a first data rate and the second transmission protocol further comprises a second data rate less than the first data rate.

12. The system of claim 8 wherein the device comprises a vehicle engine.

13. The system of claim 8 further comprising a remote unit, the remote unit comprising:

a transceiver for transmitting the command message according to the first transmission protocol, receiving the acknowledgment signal, and transmitting the plurality of packets of the command message according to the second transmission protocol; and

a controller for selecting the first transmission protocol for use in transmitting the command message in response to a user input, and selecting the second transmission protocol for use in transmitting the plurality of packets of the command message according to the second transmission protocol when the remote unit transceiver fails to receive the acknowledgment signal.

14. The system of claim 13 wherein the device comprises a vehicle engine.

15. A method for remote activation of a device, the method comprising:

wirelessly transmitting a command message according a first transmission protocol;

selecting a second transmission protocol in response to a failure to receive a wireless acknowledgment signal indicating receipt of the command message transmitted according to the first transmission protocol, the second transmission protocol comprising partitioning of the command message into a plurality of packets such that each packet includes a portion of the command message less than a complete command message; and

wirelessly transmitting each of the plurality of packets of the command message separately according to the second transmission protocol to increase the effective range of the command message.

16. The method of claim 15 further comprising:

receiving at the device the command message transmitted according to the first transmission protocol; and

transmitting the acknowledgment signal indicating receipt of the command message transmitted according to the first transmission protocol.

17. The method of claim 15 wherein the first transmission protocol comprises a first data rate and the second transmission protocol further comprises a second data rate less than the first data rate.

18. The method of claim 15 wherein the first transmission protocol comprises a first modulation scheme and the second transmission protocol comprises a second modulation scheme different than the first modulation scheme.

19. The method of claim 15 further comprising:

receiving at the device the plurality of packets transmitted according the second transmission protocol; and

assembling the plurality of packets into the complete command message.