Method and apparatus to facilitate message transmission and reception using defferent transmission characteristics

• US 20070005806A1
• Filed: 06/30/2005
• Published: 01/04/2007
• Est. Priority Date: 06/30/2005
• Status: Active Grant

• Current Assignee: The Chamberlain Group LLC
• Original Assignee: The Chamberlain Group, Inc. (The Chamberlain Group LLC)
• Inventors: Laird, Edward, Fitzgibbon, James
• Granted Patent: US 9,148,409 B2
• Time in Patent Office: Days
• US Class Current: 709/246
• CPC Class Codes: G07C 2009/00412 the transmitted data signal being encrypted
• CPC Class Codes: G07C 2009/00476 dynamically
• CPC Class Codes: G07C 2009/00492 whereby the code is a rolling code
• CPC Class Codes: G07C 2009/00555 comprising means to detect or avoid relay attacks
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 63/1475 Passive attacks, e.g. eavesdropping or listening without modification of the traffic monitored

Abstract

Upon providing (101) message content (such as a remote control instruction) to be transmitted, and in conjunction with provision (102) of a plurality of different transmission characteristics (as correspond, for example, to different types of transmission) and a corresponding plurality of correlated recovery identifiers (103), a particular transmission characteristic is selected (104) and used to transmit (105) a joint message. n particular, in a preferred approach, the selected transmission characteristic (106) is used when transmitting at least a portion of the message content portion of the joint message while another part of the joint message carries the recovery identifier to thereby facilitate selection of an appropriate reception technique by a receiver when receiving the joint message.

Claims

1. A method comprising:

providing message content to be transmitted;

providing a plurality of different transmission characteristics;

providing recovery identifiers wherein at least a portion of a given recovery identifier correlates to a given corresponding one of the plurality of different transmission characteristics;

selecting a particular one of the different transmission characteristics to provide a selected transmission characteristic;

transmitting a joint message comprising;

the recovery identifier as uniquely corresponds to the selected transmission characteristic;

the message content;

wherein at least a portion of the joint message as comprises the message content is transmitted using the selected transmission characteristic.

2. The method of claim 1 wherein the message content comprises remote control signaling.

3. The method of claim 1 wherein providing a plurality of different transmission characteristics comprises providing at least one of:

a plurality of candidate data rates;

a plurality of candidate spread spectrum practices;

a plurality of candidate carrier modulations;

a plurality of candidate carrier frequencies;

a plurality of candidate joint message formats;

a plurality of candidate data orders;

a plurality of candidate data inversion patterns.

4. The method of claim 1 wherein providing recovery identifiers comprises providing at least one of:

a particular data rate identifier;

a particular spread spectrum practice identifier;

a particular carrier modulation identifier;

a particular carrier frequency identifier;

a particular joint message format identifier;

a particular data order identifier;

a particular data inversion pattern identifier.

5. The method of claim 1 wherein transmitting the joint message comprises transmitting a contiguous aggregation of the message content and the recovery identifier as uniquely corresponds to the selected transmission characteristic.

6. The method of claim 5 wherein the joint message further comprises at least a first field comprising the message content and a second field comprising the recovery identifier.

7. The method of claim 6 wherein the first field and second field are discrete with respect to one another.

8. The method of claim 6 wherein the first field and the second field are at least partially interleaved with one another.

9. The method of claim 1 wherein transmitting a joint message comprises transmitting a plurality of discrete messages.

10. The method of claim 9 wherein the plurality of discrete messages are separated from one another by at least one of:

time;

carrier characteristics;

specific bit patterns

specific quantity of bits.

11. The method of claim 1 wherein the message content comprises, at least in part, an identifier for at least one of:

a transmitting platform;

a receiving platform;

a communication system;

a communication system user.

12. An apparatus comprising:

message content;

a transmitter capable of various selectable types of transmission, wherein the various selectable types of transmission differ from one another as a function, at least in part, of corresponding transmission characteristics;

a plurality of recovery content indicators wherein each of the recovery content indicators has at least a portion thereof that corresponds to a given corresponding one of the transmission characteristics;

a joint message formatter having an input operably coupled to the message content and to the plurality of recovery content indicators and having a joint message output operably coupled to the transmitter and comprising both the message content and a specific recovery content indicator as corresponds to a presently selected one of the transmission characteristics.

13. The apparatus of claim 12 wherein the specific recovery content indicator comprises a portion of the message content.

14. The apparatus of claim 12 wherein the message content comprises remote control signaling.

15. The apparatus of claim 12 wherein the transmission characteristics comprise at least one of:

a plurality of candidate data rates;

a plurality of candidate conversion symbol sets;

a plurality of candidate spread spectrum practices;

a plurality of candidate carrier modulations;

a plurality of candidate bit inversion patterns;

a plurality of candidate carrier frequencies;

a plurality of candidate bit interleaving patterns;

a plurality of candidate bit patterns.

a plurality of candidate joint message formats.

16. The apparatus of claim 12 wherein the recovery content indicator comprises at least one of:

a particular symbol conversion set identifier;

a particular spread spectrum practice identifier;

a particular carrier modulation identifier;

a particular bit inversion pattern identifier;

a particular carrier frequency identifier;

a particular bit interleaving pattern identifier;

a particular bit pattern identifier;

a particular joint message format identifier;

a particular data order identifier.

17. The apparatus of claim 12 wherein the joint message output comprises a contiguous combination of the message content and the specific recovery content indicator.

18. The apparatus of claim 17 wherein the joint message output further comprises at least a first field comprising the message content and a second field comprising the specific recovery content indicator.

19. The apparatus of claim 18 wherein the first field and second field are discrete with respect to one another.

20. The apparatus of claim 18 wherein the first field and the second field are at least partially interleaved with one another.

21. The apparatus of claim 12 wherein the joint message output comprises a plurality of discrete messages.

22. A method comprising:

receiving a transmission of a joint message comprising, in part, comprising recovery content;

selecting a particular way of receiving a transmission of another portion of the joint message comprising message content as a function, at least in part, of the recovery content;

using the particular way to receive that portion of the joint message that comprises the message content.

23. The method of claim 22 wherein receiving a transmission of a joint message comprises receiving a single contiguous message.

24. The method of claim 22 wherein receiving a transmission of a joint message comprises receiving a plurality of discrete transmissions.

25. The method of claim 22 wherein the message content comprises remote control signaling.

26. The method of claim 22 wherein the particular way comprises at least one of:

selecting a particular data rate from amongst a plurality of candidate data rates;

using a particular set of conversion symbols as selected from amongst a plurality of candidate sets;

selecting a particular spread spectrum practice from amongst a plurality of candidate sets;

selecting a particular carrier demodulation from amongst a plurality of candidate carrier demodulations;

selecting a particular bit inversion pattern from amongst a plurality of candidate patterns;

selecting a particular carrier frequency from amongst a plurality of candidate carrier frequencies;

selecting a particular bit de-interleaving pattern from amongst a plurality of candidate patterns;

selecting a particular joint message format from amongst a plurality of candidate formats;

selecting a particular data inversion patterns from amongst a plurality of candidate patterns

27. The method of claim 22 wherein the recovery content comprises at least one of:

a symbol conversion set identifier;

a spread spectrum practice identifier;

a carrier demodulation identifier;

a bit inversion pattern identifier;

a carrier frequency identifier;

a bit de-interleaving pattern identifier;

a joint message format identifier;

a data pattern inversion pattern identifier.

28. The method of claim 22 wherein receiving a transmission of a joint message comprises receiving a transmission of a joint message wherein the joint message comprises at least a first field comprising the message content and a second field comprising the recovery content.

29. The method of claim 28 wherein the first field and second field are discrete with respect to one another.

30. The method of claim 28 wherein the first field and the second field are at least partially interleaved with one another.

31. The method of claim 28 wherein receiving a transmission of a joint message comprises receiving a plurality of transmitted messages that comprise, when aggregated, the joint message.

32. The method of claim 31 wherein the plurality of transmitted messages are separated from one another by at least one of:

time;

carrier characteristics

specific bit patterns.

33. The method of claim 22 wherein the message content comprises, at least in part, an identifier for at least one of:

a transmitting platform;

a receiving platform;

a communication system;

a communication system user.

34. An apparatus comprising:

a receiver capable of receiving various selectable types of transmissions, wherein the various selectable types of transmission differ from one another as a function, at least in part, of corresponding transmission characteristics, and wherein the receiver is configured and arranged to receive a portion of a joint message as comprises message content using a selected one of the various selectable types of transmissions;

a transmission characteristic selector operably coupled to a control input of the receiver, wherein the transmission characteristic selector is responsive to a recovery content input;

a joint message processor operably coupled to the receiver and to the recovery content input of the transmission characteristic selector, wherein the joint message processor is arranged and configured to extract recovery content from the joint message

35. The apparatus of claim 34 wherein the message content comprises remote control signaling.

36. The apparatus of claim 34 wherein the transmission characteristics comprise at least one of:

a plurality of candidate data rates;

a plurality of candidate conversion symbol sets;

a plurality of candidate spread spectrum practices;

a plurality of candidate carrier modulations;

a plurality of candidate bit inversion patterns;

a plurality of candidate carrier frequencies;

a plurality of candidate bit interleaving patterns;

a plurality of candidate bit patterns.

a plurality of candidate joint message formats.

37. The apparatus of claim 34 wherein the recovery content comprises at least one of:

a particular symbol conversion set identifier;

a particular spread spectrum practice identifier;

a particular carrier modulation identifier;

a particular bit inversion pattern identifier;

a particular carrier frequency identifier;

a particular bit interleaving pattern identifier;

a particular bit pattern identifier;

a particular joint message format identifier;

a particular data order identifier.

38. The apparatus of claim 34 wherein the receiver comprises means for receiving a transmission of a joint message comprising at least a first field comprising the message content and a second field comprising the recovery content.

39. The apparatus of claim 38 wherein the first field and second field are discrete with respect to one another.

40. The apparatus of claim 38 wherein the first field and the second field are at least partially interleaved with one another.

41. The apparatus of claim 38 wherein the transmission of a joint message comprises a plurality of transmitted messages that comprise, when aggregated, the joint message.

42. The apparatus of claim 41 wherein the plurality of transmitted messages are separated from one another by at least one of:

time;

carrier characteristics;

specific bit patterns.

43. The apparatus of claim 34 wherein the message content comprises, at least in part, an identifier for at least one of:

a transmitting platform;

a receiving platform;

a communication system;

a communication system user.