Telemetry switchover state machine with firmware priority control
First Claim
Patent Images
1. An implantable device comprising:
- at least two telemetry circuits including a first telemetry circuit and a second telemetry circuit, each telemetry circuit configured to wirelessly communicate with an external device; and
a controller coupled to each telemetry circuit, the controller configured to, after a communication session is established;
operate a selected one of the first or second telemetry circuits in a synchronous state in which the telemetry circuit recurrently transmits data synchronized with a received synchronization signal associated with the selected telemetry circuit until the selected telemetry circuit detects loss of the synchronization signal; and
operate the first and second telemetry circuits in an out-of-synchronization state, upon detection of the loss of the synchronization signal and before the communication session terminates, in which the implantable device monitors for both a synchronization signal associated with the first telemetry circuit and a synchronization signal associated with the second telemetry circuit and in which receipt of the synchronization signal associated with the first telemetry circuit causes the first telemetry circuit to transition to the synchronous state and in which receipt of the synchronization signal associated with the second telemetry circuit causes the second telemetry circuit to transition to the synchronous state,wherein the first telemetry circuit and second telemetry circuit are configured to recurrently transition to the out-of-synchronization state upon detecting loss of the associated synchronization signal before termination of the communication session.
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Abstract
The selection of one communication channel from a plurality of available channels is determined by a state machine. In an automatic selection mode, a first telemetry system has priority over other telemetry systems. A communication session is in progress based on session initiation and termination triggers. An override function allows manual selection of a telemetry system.
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Citations
25 Claims
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1. An implantable device comprising:
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at least two telemetry circuits including a first telemetry circuit and a second telemetry circuit, each telemetry circuit configured to wirelessly communicate with an external device; and a controller coupled to each telemetry circuit, the controller configured to, after a communication session is established; operate a selected one of the first or second telemetry circuits in a synchronous state in which the telemetry circuit recurrently transmits data synchronized with a received synchronization signal associated with the selected telemetry circuit until the selected telemetry circuit detects loss of the synchronization signal; and operate the first and second telemetry circuits in an out-of-synchronization state, upon detection of the loss of the synchronization signal and before the communication session terminates, in which the implantable device monitors for both a synchronization signal associated with the first telemetry circuit and a synchronization signal associated with the second telemetry circuit and in which receipt of the synchronization signal associated with the first telemetry circuit causes the first telemetry circuit to transition to the synchronous state and in which receipt of the synchronization signal associated with the second telemetry circuit causes the second telemetry circuit to transition to the synchronous state, wherein the first telemetry circuit and second telemetry circuit are configured to recurrently transition to the out-of-synchronization state upon detecting loss of the associated synchronization signal before termination of the communication session. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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monitoring for a synchronization signal from an external device using at least one of a plurality of wireless telemetry circuits of an implantable device, the plurality of telemetry circuits including a first telemetry circuit and a second telemetry circuit; establishing a communication session using the implantable device; operating a selected one of the first or second telemetry circuits in a synchronous state in which the telemetry circuit recurrently transmits data synchronized with a received synchronization signal associated with the selected telemetry circuit until the selected telemetry circuit detects loss of the synchronization signal; and operating the first and second telemetry circuits in an out-of-synchronization state, upon detection of the loss of the synchronization signal and before the communication session terminates, in which the implantable device monitors for both a synchronization signal associated with the first telemetry circuit and a synchronization signal associated with the second telemetry circuit and in which receipt of a synchronization signal associated with the first telemetry circuit causes the first telemetry circuit to transition to the synchronous state and in which receipt of a synchronization signal associated with the second telemetry circuits causes the second telemetry circuit to transition to the synchronous state, wherein the first telemetry circuit and second telemetry circuit are configured to recurrently transition to the out-of-synchronization state upon detecting loss of the associated synchronization signal before termination of the communication session. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A system comprising:
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an external device having at least one external telemetry circuit configured to transmit a synchronization signal; and an implantable device having at least two implantable telemetry circuits and a controller coupled to each of the at least two implantable telemetry circuits, the two implantable telemetry circuits including a first implantable telemetry circuit and including a second implantable telemetry circuit, the controller configured to, after a communication session is established; operate a selected one of the first or second telemetry circuits in a synchronous state in which the telemetry circuit recurrently transmits data synchronized with a received synchronization signal associated with the selected telemetry circuit until the selected telemetry circuit detects loss of the synchronization signal; and operate the first and second telemetry circuits in an out-of-synchronization state, upon detection of the loss of the synchronization signal and before the communication session terminates, in which the implantable device monitors for both a synchronization signal associated with the first telemetry circuit and a synchronization signal associated with the second telemetry circuit and in which receipt of a synchronization signal associated with the first telemetry circuit causes the first telemetry circuit to transition to the synchronous state and in which receipt of a synchronization signal associated with the second telemetry circuits causes the second telemetry circuit to transition to the synchronous state, wherein the first implantable telemetry circuit and second implantable telemetry circuit are configured to recurrently transition to the out-of-synchronization state upon detecting loss of the associated synchronization signal before termination of the communication session. - View Dependent Claims (22, 23, 24, 25)
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Specification