Telemetry duty cycle management system for an implantable medical device
First Claim
Patent Images
1. A telemetry system, comprising:
- an implantable device and an external device, each having an RF transmitter and receiver and a wakeup timer;
wherein one of the implantable or external devices is configured to operate as a master device while the other device is configured to operate as a slave device;
wherein the master device is programmed to power up its RF transmitter and receiver for a specified master time window and to wirelessly transmit a digital key to the slave device at wakeup intervals defined by the master device wakeup timer and listen for a wireless response;
wherein the slave device is programmed to power up its RF receiver for a specified slave time window, which is synchronized to the master time window, to listen for a digital key transmitted by the master device at wakeup intervals defined by the slave device wakeup timer and to power up its RF transmitter to wirelessly transmit a response to the master device if the digital key is received; and
wherein the master and slave devices are programmed such that a wireless RF communications session is established between the master and slave devices when the response is received by the master device, wherein the master time window is adjusted based on the time of the response.
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Abstract
A telemetry system enabling radio frequency (RF) communications between an implantable medical device and an external device, or programmer, in which the RF circuitry is normally maintained in a powered down state in order to conserve power. At synchronized wakeup intervals, one of the devices designated as a master device powers up its RF transmitter to request a communications session, and the other device designated as a slave device powers up its RF transmitter to listen for the request. Telemetry is conducted using a far field or near field communication link.
318 Citations
20 Claims
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1. A telemetry system, comprising:
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an implantable device and an external device, each having an RF transmitter and receiver and a wakeup timer; wherein one of the implantable or external devices is configured to operate as a master device while the other device is configured to operate as a slave device; wherein the master device is programmed to power up its RF transmitter and receiver for a specified master time window and to wirelessly transmit a digital key to the slave device at wakeup intervals defined by the master device wakeup timer and listen for a wireless response; wherein the slave device is programmed to power up its RF receiver for a specified slave time window, which is synchronized to the master time window, to listen for a digital key transmitted by the master device at wakeup intervals defined by the slave device wakeup timer and to power up its RF transmitter to wirelessly transmit a response to the master device if the digital key is received; and wherein the master and slave devices are programmed such that a wireless RF communications session is established between the master and slave devices when the response is received by the master device, wherein the master time window is adjusted based on the time of the response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A telemetry system, comprising:
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an implantable device and an external device, each having an RF transmitter and receiver; a wakeup timer incorporated into the implantable device; wherein the external device is programmed to power up its RF transmitter and receiver for a specified master time window and to wirelessly transmit a digital key to the implantable device and listen for a wireless RF response; wherein implantable device is programmed to power up its receiver for a specified slave time window, which is synchronized to the master time window, to listen for the digital key wirelessly transmitted by the external device at wakeup intervals defined by the slave device wakeup timer and to power up its RF transmitter to transmit a wireless RF response to the external device if the digital key is received; and
,wherein the external and implantable devices are programmed such that a wireless RF communications session is established between the devices when a wireless RF response is received by the external device, wherein the master time window is adjusted based on the time of the response, and further wherein the implantable device is programmed to power down its RF transmitter and receiver after the communications session is finished. - View Dependent Claims (17, 18, 19, 20)
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Specification