Method for waking up an implantable medical device from a dormant state

An implantable medical device configured to selectively assume an awake state and a dormant state, the implantable medical device comprising:

• reception circuitry configured to receive a wake-up signal via a wireless link from an external device;
• activation circuitry configured to activate an awake state of the implantable medical device in response to a received wake-up signal;
• communication circuitry configured to establish, in the awake state, a communication between the external device and the implantable medical device;
• and
• processing circuitry configured to identify the activation of the awake state as a valid activation based on at least one or a predefined number of attempts to establish a communication, and in case the activation of the awake state is not identified as a valid activation, to block a subsequent activation of said awake state of the implantable medical device based on the wake-up signal, wherein said blocking includes:
• marking a predefined matching signal corresponding to the wake-up signal as invalid in a list of matching signals so that a signal is received by the implantable medical device which resembles a matching signal as identified in the list of matching signals, the implantable medical device is not transferred to the awake state, wherein if, during the identifying, it is detected that the list of matching signals includes a number of predefined matching signals equal to or exceeding a predefined maximum number, modifying the list of matching signals by marking at least one matching signal of the list of matching signals as valid.