IMPLANTABLE MEDICAL DEVICE TELEMETRY WITH PERIODIC FREQUENCY HOPPING
First Claim
1. A cardiac rhythm management (CRM) system, comprising:
- an implantable medical device including;
a CRM module; and
an implant telemetry module; and
an external system;
a programming module; and
an external telemetry module,wherein the implant telemetry module and the external telemetry module each include a telemetry circuit including;
an antenna;
a transceiver coupled to the antenna, the transceiver including a plurality of channels each representing a predetermined frequency band for data transmission between the implantable medical device and the external system; and
a telemetry controller coupled to the transceiver, the telemetry controller adapted to control a channel hopping including selecting an active channel from the plurality of channels on an approximately periodic basis, to control the data transmission using the active channel during a synchronous scan mode during which the channel hopping in the external system and the channel hopping in the implantable medical device are synchronous, to start an asynchronous scan mode after the channel hopping in the external system and the channel hopping in the implantable medical device become asynchronous, and to restore the synchronization of the channel hopping in the external system and the channel hopping in the implantable medical device during the asynchronous scan mode.
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Accused Products
Abstract
A far-field radio-frequency (RF) telemetry system for data transmission between an implantable medical device and an external system includes a plurality of channels each representing a frequency band within a predetermined frequency range. The data transmission is performed using at least one active channel at any instant. Channel hopping is performed on a periodic basis throughout a telemetry session such that the active channel keeps scanning through an array of channels selected from the plurality of channels. If a data frame is not successfully transmitted, it is repeatedly re-transmitted using the current and/or the next active channels until its transmission becomes successful.
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Citations
22 Claims
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1. A cardiac rhythm management (CRM) system, comprising:
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an implantable medical device including; a CRM module; and an implant telemetry module; and an external system; a programming module; and an external telemetry module, wherein the implant telemetry module and the external telemetry module each include a telemetry circuit including; an antenna; a transceiver coupled to the antenna, the transceiver including a plurality of channels each representing a predetermined frequency band for data transmission between the implantable medical device and the external system; and a telemetry controller coupled to the transceiver, the telemetry controller adapted to control a channel hopping including selecting an active channel from the plurality of channels on an approximately periodic basis, to control the data transmission using the active channel during a synchronous scan mode during which the channel hopping in the external system and the channel hopping in the implantable medical device are synchronous, to start an asynchronous scan mode after the channel hopping in the external system and the channel hopping in the implantable medical device become asynchronous, and to restore the synchronization of the channel hopping in the external system and the channel hopping in the implantable medical device during the asynchronous scan mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for data transmission between an implantable medical device and an external system, the method comprising:
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producing channel selection commands each specifying a channel in a scan channel list when a scan timer escape interval expires, the scan channel list including channels selected from a plurality of channels each representing a predetermined frequency band; performing a channel hopping in response to each of the channel selection commands, the channel hopping making the channel specified in the each of the channel selection commands an active channel; performing data transmission between the implantable medical device and the external system using the active channel during a synchronous scan mode during which the channel hopping in the external system and the channel hopping in the implantable medical device are synchronous; starting an asynchronous scan mode after making a predetermined number of attempts to transmit data using different channels in the scan channel list without success; and restoring the synchronization of the channel hopping in the external system and the channel hopping in the implantable medical device during the asynchronous scan mode. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification