Dynamic channel selection for RF telemetry with implantable device
First Claim
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1. A telemetry system for enabling radio-frequency (RF) communications between an implantable medical device and an external device over a wireless medium, comprising:
- an antenna, an RF transmitter, an RF receiver, and a controller incorporated into each of the implantable and external devices,wherein the RF transmitter and receiver of each device are tunable and may be switched among a plurality of different communications channels which differ in frequency;
wherein the controller is interfaced to the RF transmitter and receiver in each device to enable establishment of a communications session and data transfer over a selected channel;
wherein the external device and implantable device controllers are programmed to establish a communications session over one of a plurality of designated control channels;
after establishment of a communications session, the external device controller is programmed to search among a plurality of designated data channels to select an unused data channel and transmit an identification of the selected channel to the implantable device;
wherein the external device and implantable device controllers are programmed to switch to the selected data channel for subsequent data transfer during the communications session;
wherein the external device and implantable device controllers are programmed to revert to the designated control channel that is farthest away in frequency from the selected data channel upon a degradation in the quality of the selected data channel sufficient to constitute a failure in the selected data channel.
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Abstract
A telemetry system for radio-frequency communications between an implantable medical device and an external device providing improved noise immunity is disclosed. Multiple communications channels are used to enable establishment and re-establishment of communications between a particular pair of devices in a multiple device environment.
124 Citations
20 Claims
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1. A telemetry system for enabling radio-frequency (RF) communications between an implantable medical device and an external device over a wireless medium, comprising:
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an antenna, an RF transmitter, an RF receiver, and a controller incorporated into each of the implantable and external devices, wherein the RF transmitter and receiver of each device are tunable and may be switched among a plurality of different communications channels which differ in frequency; wherein the controller is interfaced to the RF transmitter and receiver in each device to enable establishment of a communications session and data transfer over a selected channel; wherein the external device and implantable device controllers are programmed to establish a communications session over one of a plurality of designated control channels; after establishment of a communications session, the external device controller is programmed to search among a plurality of designated data channels to select an unused data channel and transmit an identification of the selected channel to the implantable device; wherein the external device and implantable device controllers are programmed to switch to the selected data channel for subsequent data transfer during the communications session; wherein the external device and implantable device controllers are programmed to revert to the designated control channel that is farthest away in frequency from the selected data channel upon a degradation in the quality of the selected data channel sufficient to constitute a failure in the selected data channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method by which an implantable medical device and an external device may communicate over a wireless medium, comprising:
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providing a plurality of different communications channels which differ in frequency; programming the external device and implantable device to establish a communications session over one of a plurality of designated control channels; programming the external device controller to search among a plurality of designated data channels to select an unused data channel and transmit an identification of the selected channel to the implantable device after establishment of a communications session over a designated control channel; programming the external device and implantable device to switch to the selected data channel for subsequent data transfer during the communications session; and
,programming the external device and implantable device to revert to the designated control channel that is farthest away in frequency from the selected data channel upon a degradation in the Quality of the selected data channel sufficient to constitute a failure in the selected data channel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification