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System and methods for establishing a communication session between an implantable medical device and an external device

  • US 9,855,433 B2
  • Filed: 02/15/2017
  • Issued: 01/02/2018
  • Est. Priority Date: 11/27/2013
  • Status: Active Grant
First Claim
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1. A method for establishing a communications session with an implantable medical device (IMD), wherein the IMD and an external device are configured to communicate with one another through a protocol that utilizes a dedicated advertisement channel, the method comprising:

  • periodically transmitting, from the IMD after implantation in a patient, advertisement notices over the dedicated advertisement channel according to the protocol, the advertisement notices being transmitted periodically at an advertisement period over multiple cycles;

    repeatedly scanning the advertisement channel, by the external device, for select scanning intervals in search of the advertisement notices, the scanning operation being repeated periodically at a scan period over multiple cycles, wherein the advertisement period and scan period are independent of one another such that the advertisement and scan periods at least partially overlap intermittently after a number of cycles, wherein (i) the advertising notices have a first length and each of the scanning operations have a second length that is shorter that the first length, and (ii) the advertising and scan periods differ to cause a respective scan operation in a plurality of cycles to begin before and overlap with a corresponding advertising notice during the plurality of cycles;

    when the external device detects one of the advertisement notices, establishing a communications link between the external device and the IMD; and

    communicating one or more parameters from the external device using the established communications link to control operations of the IMD to deliver therapy to the patient.

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