System and method for synchronous wireless communication with a medical device

• US 20070153705A1
• Filed: 12/29/2005
• Published: 07/05/2007
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Masoud, Javaid, Rosar, George, Haubrich, Gregory, Farlow, Charles
• Granted Patent: US 8,102,789 B2
• Time in Patent Office: Days
• US Class Current: 370/254
• CPC Class Codes: A61N 1/37288 Communication to several implantable medical devices within one patient

Abstract

Constituents of a network of medical devices communicate according to a synchronous communication protocol. A constituent of the network is established as a conductor. Time slots are assigned to each constituent of the network other than the conductor. Information is communicated between the constituents of the network in the assigned time slots.

Claims

1. A method of communicating information between constituents of a network that includes at least one medical device, the method comprising:

establishing a first constituent of the network as a conductor;

assigning time slots to each constituent of the network other than the conductor; and

communicating information between the constituents of the network, including the conductor, in the assigned time slots.

2. The method of claim 1, wherein establishing the first constituent of the network as the conductor is performed by evaluating hierarchical ranks associated with each constituent of the network.

3. The method of claim 1, wherein establishing a first constituent of the network as the conductor is performed by evaluating capabilities of each constituent of the network.

4. The method of claim 1, wherein communicating information between the conductor and the other constituents of the network in the assigned time slots comprises:

periodically communicating a wake-up signal that spans a drift window time period around the assigned time slots to resynchronize the conductor with the constituents of the network.

5. The method of claim 1, wherein the conductor transmits information relating to an identity and status of all constituents of the network to each constituent of the network.

6. The method of claim 5, wherein communicating information between a transmitting constituent and a receiving constituent of the network, neither one of which being the conductor, comprises:

transmitting a wake-up signal from the transmitting constituent during a time slot assigned to the receiving constituent, the wake-up signal spanning a drift window time period around the time slot to resynchronize the transmitting constituent with the receiving constituent.

7. The method of claim 1, wherein the time slots assigned to each of the constituents of the network each have a different frequency associated therewith.

8. The method of claim 1, wherein communicating information between the constituents of the network comprises:

dynamically determining a frequency for communication.

9. The method of claim 1, wherein assigning time slots to each constituent of the network other than the conductor comprises:

operating at least one constituent of the network other than the conductor to transmit a wake-up signal with its data to the conductor to identify the constituent;

establishing an event schedule which includes time slots assigned to predict the timing of future transmissions from the constituent based on a history of transmissions from the constituent; and

operating the conductor to listen for transmissions from the constituent in the time slots established by the event schedule.

10. The method of claim 9, wherein the conductor reverts away from the event schedule and back to a standard listening pattern following a lack of received transmissions from the constituent for a time period that exceeds a threshold time-out period.

11. The method of claim 9, wherein the conductor resynchronizes with the constituent if a number of scheduled transmissions from the constituent greater than a threshold are not received by the conductor.

12. A wireless network for communicating medical data among a plurality of devices, comprising:

at least one constituent device capable of wirelessly transmitting medical data; and

a conductor device configured to assign a time slot to each constituent device for transmission.

13. The wireless network of claim 12, wherein the conductor device is determined by evaluating hierarchical ranks associated with devices of the network.

14. The wireless network-of claim 12, wherein the conductor device is determined by evaluating capabilities of each device in the network.

15. The wireless network of claim 12, wherein the constituent device periodically transmits a wake-up signal that spans a drift window time period around the assigned time slot to resynchronize the constituent device with the conductor.

16. The wireless network of claim 12, wherein the conductor transmits information relating to an identity and status of all constituent devices of the network to each constituent device of the network.

17. The wireless network of claim 16, wherein the constituent device is operable to transmit a wake-up signal to a receiving constituent device during a time slot assigned to the receiving constituent device, the wake-up signal spanning a drift window time period around the time slot assigned to the receiving constituent device to resynchronize the constituent device with the receiving constituent device.

18. The wireless network of claim 12, wherein the constituent device is operable to transmit a wake-up signal to the conductor along with the medical data to be transmitted to identify the constituent device, and wherein the conductor device establishes an event schedule that includes time slots assigned to predict the timing of future transmissions from the constituent device based on a history of transmissions from the constituent device.

19. The wireless network of claim 18, wherein the conductor device reverts away from the event schedule and back to a standard listening pattern following a lack of received transmissions from the constituent device for a time period that exceeds a threshold time-out period.

20. The wireless network of claim 18, wherein the conductor device resynchronizes with the constituent device if a number of scheduled transmissions from the constituent device greater than a threshold are not received by the conductor.