Patent ID: 9749086
Date: 2017-08-29
CPC Classifications: A61B,H04K,H04L,H04W

Claim:
1. A method for preventing unauthorized wireless communication with an implantable medical device, the method comprising: receiving a pilot signal request at an implantable medical device over a wireless channel and transmitting a pilot signal from the implantable medical device over the wireless channel in response to receiving the pilot signal request; receiving the pilot signal at a wearable external device and estimating the wireless channel, at the wearable external device, using the received pilot signal; pre-equalizing one or more command signals based upon the estimation of the wireless channel by the wearable external device to generate one or more wearable external device pre-equalized command signals; transmitting the one or more wearable external device pre-equalized command signals from the wearable external device over the wireless channel; receiving the one or more wearable external device pre-equalized command signals from the wearable external device at the implantable medical device; controlling the implantable medical device using the one or more wearable external device pre-equalized command signals received at the implantable medical device; receiving the pilot signal at an adversary device and estimating the wireless channel, at the adversary device, using the received pilot signal, wherein the estimation of the wireless channel using the received pilot signal at the adversary device is more erroneous than the estimation of the wireless channel using the received pilot signal at the wearable external device, pre-equalizing one or more command signals based upon the estimation of the wireless channel by the adversary device to generate one or more adversary device pre-equalized command signals; transmitting the one or more adversary device pre-equalized command signals from the adversary device over the wireless channel; receiving the one or more adversary device pre-equalized command signals from the adversary device at the implantable medical device; and failing to control the implantable medical device using the one or more adversary device pre-equalized command signals received at the implantable medical device as a result of the more erroneous estimation of the wireless channel by the adversary device.