System and method for remote activation with interleaved modulation protocol

• US 8,872,616 B2
• Filed: 09/28/2006
• Issued: 10/28/2014
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: King, Ronald O., Ghabra, Riad, Nantz, John S., Tang, Tom Q.
• Primary Examiner(s): YANG, JAMES J
• Application Number:
  US11/536,225
• Publication Number:
  US 20080079602A1
• Time in Patent Office: 2,952 Days
• Field of Search: 34042635-436, 340/825, 340/442, 340/445, 340425-42623, 340/3.21, 455/450, 455/509, 455/455, 455/516, 455/102
• US Class Current: 340/3.21
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G08C 17/02 using a radio link

Abstract

A system and method for remote activation of a device includes, in one embodiment, transmitting a command message according to a first modulation, and transmitting a signal representing the command message for the device according to a second modulation. The signal representing the command message transmitted according to the second modulation may be transmitted within the command message transmitted according to the first modulation.

Claims

1. A method for wireless control of a device, the method comprising:

receiving user input representing a device command;

generating a wireless command signal including a command message corresponding to the device command;

partitioning the wireless command signal into a plurality of packets;

twice modulating the same plurality of packets, wherein all of the plurality of packets are modulated according to a first modulation scheme and each of the plurality of packets are modulated according to a second modulation scheme; and

transmitting the plurality of packets, wherein the entirety of the plurality of packets conveys the command message according to the first modulation scheme and each one of the same plurality of packets conveys the same command message in its entirety according to the second modulation scheme.

5. The method of claim 1 wherein the first modulation scheme comprises amplitude shift keyed modulation.

6. The method of claim 5 wherein the second modulation scheme comprises frequency shift keyed modulation.

7. The method of claim 1 wherein, upon transmitting the plurality of packets, the command message conveyed according to the first modulation scheme is conveyed at a first data rate, and the command message conveyed according to the second modulation scheme is conveyed at a second data rate greater than the first data rate.

8. The method of claim 7 wherein a first latency is associated with the device command for the command message conveyed at the first data rate, and a second latency is associated with the device command for the command message conveyed at the second data rate, the second latency being less than the first latency.

9. The method of claim 1 further comprising:

receiving a single packet from the plurality of transmitted packets, the single packet conveying the command message in its entirety according to the second modulation scheme.

10. The method of claim 9 wherein the single packet conveys only a portion of the same command message according to the first modulation scheme.

11. The method of claim 1 further comprising:

receiving all of the plurality of transmitted packets, the entirety of the plurality packets conveying the command message according to the first modulation scheme.

12. The method of claim 11 wherein each one of the plurality of packets conveys the same command message in its entirety according to the second modulation scheme.

13. The method of claim 1 wherein the entirety of the plurality of packets conveying the command message according to the first modulation scheme includes each packet comprising a portion of the command message modulated according to the first modulation scheme.

14. The method of claim 13 further comprising:

receiving at least one of the plurality of packets comprising a portion of the command message modulated according to the first modulation scheme and the same command message in its entirety modulated according to the second modulation scheme; and

for at least one packet of the plurality of packets, simultaneously demodulating the portion of the command message modulated according to the first modulation scheme and the same command message in its entirety modulated according to the second modulation scheme.

15. The method of claim 14 further comprising:

executing a command corresponding to the command message conveyed in its entirety by the at least one packet according to the second modulation scheme; and

ignoring the portion of the same command message conveyed according to the first modulation scheme within the at least one packet.

16. The method of claim 13 further comprising:

receiving all of the plurality of packets, each comprising a portion of the command message modulated according to the first modulation scheme; and

assembling the entire plurality of packets to produce the command message modulated according to the first modulation scheme.

17. The method of claim 16 further comprising:

executing the device command corresponding to the command message conveyed by the entire plurality of packets according to the first modulation scheme if the device command is a door lock command.

18. The method of claim 16 further comprising:

ignoring the device command corresponding to the command message conveyed by the entire plurality of packets according to the first modulation scheme if the device command is a door unlock command.

2. A method for wireless control of a device, the method comprising:

generating a signal including a command message modulated according to both a first modulation scheme and a second modulation scheme; and

partitioning the twice modulated command message into a plurality of packets, the entirety of the plurality of packets conveying the command message according to the first modulation scheme, and at least one packet from the plurality of packets conveying the same command message in its entirety according to the second modulation scheme.

3. The method of claim 2 wherein the first modulation scheme comprises amplitude shift keyed modulation and the second modulation scheme comprises frequency shift keyed modulation.

4. The method of claim 2 further comprising:

transmitting the plurality of packets at a first data rate, wherein the at least one packet conveying the command message in its entirety according to the second modulation scheme conveys the command message at a second data rate greater than the first data rate.

19. The method of claim 2, wherein the entirety of the plurality of packets conveying the command message according to the first modulation scheme includes each packet comprising a portion of the command message modulated according to the first modulation scheme.

20. A method for wireless data transmission comprising:

generating a wireless signal including a message, the wireless signal comprising a plurality of data packets all modulated using a first modulation scheme and each of the same plurality of data packets modulated using a second modulation scheme, the entirety of the plurality of data packets conveying the message according to the first modulation scheme and each one of the plurality of data packets conveying the same message according to the second modulation scheme.