Telemetry protocol for ultra low error rates useable in implantable medical devices
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United States of America Patent
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Apr 23, 2013
Grant Date -
Dec 6, 2012
app pub date -
Aug 14, 2012
filing date -
Aug 30, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A telemetry protocol for an implantable medical device is disclosed. The sending device forms a block of information to be telemetered to the receiving device, including a header, a message, and an error detection data (CRC1). The entirety of the block is divided into smaller packets of a predetermined size. Each packet has a CRC computed for it (CRC2), and is sent to the receiving device, which deduces a CRC2 and compares it with the appended CRC2. If not valid, that packet is again requested to be resent. If valid, the next packet is requested to be sent, its CRC2 checked, etc., until all packets are received and verified. The receiving device then discards the CRC2s to reconstitute the original block. The receiving device then deduces CRC1 and compares it with the CRC1 appended to the block. If valid, the block is accepted, and if not, the procedure is repeated.
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