POWER OPTMIZATION IN A MEDICAL IMPLANT BASED SYSTEM

• US 20100036462A1
• Filed: 08/06/2009
• Published: 02/11/2010
• Est. Priority Date: 08/06/2008
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Ramakrishnan, Sthanunathan, Balakrishnan, Jaiganesh
• Granted Patent: US 8,554,334 B2
• Time in Patent Office: Days
• US Class Current: 607/60
• CPC Class Codes: A61N 1/37211 Means for communicating with stimulators
• CPC Class Codes: A61N 1/37254 Pacemaker or defibrillator security, e.g. to prevent or inhibit programming alterations by hackers or unauthorised individuals

Abstract

Power optimization in a medical implant based system. A method includes receiving a portion of a signal by a first transceiver. The method further includes determining, from the portion of the signal, a time duration after which a subsequent portion of the signal will be transmitted. The subsequent portion is transmitted at end of the portion. The method also includes entering into an inactive state for the time duration.

Claims

1. A method comprising:

receiving a portion of a signal by a first transceiver;

determining, from the portion of the signal, a time duration after which a subsequent portion of the signal will be transmitted, the subsequent portion being transmitted at end of the portion; and

entering into an inactive state for the time duration.

2. The method as claimed in claim 1 and further comprising:

encoding the portion of a signal, by a second transceiver, with sequence numbers and multiple instances of a start frame delimiter (SFD); and

transmitting the portion of the signal.

3. The method as claimed in claim 2, wherein the encoding comprises one of:

encoding the portion with decrementing sequence numbers, each sequence number being preceded with the SFD; and

encoding the portion with incrementing sequence numbers, each sequence number being preceded with the SFD.

4. The method as claimed in claim 2, wherein the transmitting comprises:

transmitting the portion of the signal for a period greater than sleep time of the first transceiver.

5. The method as claimed in claim 2, wherein the transmitting comprises:

modifying transmission time based on a time uncertainty between the first transceiver and the second transceiver.

6. The method as claimed in claim 2, wherein the transmitting comprises:

modifying the portion of the signal based on a time uncertainty between the first transceiver and the second transceiver.

7. The method as claimed in claim 2, wherein the transmitting comprises:

modifying the subsequent portion of the signal based on a time uncertainty between the first transceiver and the second transceiver.

8. The method as claimed in claim 2, wherein the SFD is dissimilar to each sequence number.

9. The method as claimed in claim 2, wherein the second transceiver is a medical controller transceiver.

10. The method as claimed in claim 1 and further comprising:

awakening, by the first transceiver, after the time duration has elapsed.

11. The method as claimed in claim 1, wherein the first transceiver is a medical implant transceiver.

12. The method as claimed in claim 1, wherein the determining comprises:

detecting a start frame delimiter (SFD) in the portion of the signal; and

decoding a sequence number succeeding the SFD.

13. A method for signaling in a medical implant based system, the method comprising:

modifying transmission time of a signal based on a time uncertainty between a first transceiver and a second transceiver by the second transceiver; and

waking up, by the first transceiver, at a predefined time according to a clock of the first transceiver to detect the signal.

14. The method as claimed in claim 13 and further comprising:

determining the time uncertainty between the first transceiver and the second transceiver.

15. The method as claimed in claim 13 and further comprising:

modifying structure of the signal based on the time uncertainty.

16. The method as claimed in claim 13 and further comprising:

extending preamble of the signal if the time uncertainty does not exceed a threshold.

17. The method as claimed in claim 13 and further comprising:

inserting sequence numbers and multiple instances of a start frame delimiter (SFD) in the signal if the time uncertainty exceeds a threshold.

18. A system comprising:

a medical implant transceiver comprising

a radio frequency receiver that receives a portion of a signal; and

a physical layer circuit responsive to the portion of the signal to

determine a time duration, from the portion of the signal, after which a subsequent portion of the signal will be transmitted, the subsequent portion being transmitted at end of the portion,

cause the medical implant transceiver to enter into an inactive state for the time duration, and

awaken the medical implant transceiver after the time duration has elapsed.

19. The system as claimed in claim 18, wherein the physical layer circuit is responsive to the portion of the signal to further:

detect a start frame delimiter (SFD) in the portion of the signal; and

decode a sequence number succeeding the SFD.

20. The system as claimed in claim 18 and further comprising:

a medical controller transceiver that encodes the portion of the signal with sequence numbers and multiple instances of the SFD, each sequence number being preceded with the SFD.