Polling mechanism in a medical implant based system. A method for operating a receiver includes searching for a signal by a receiver. The method further includes entering into an inactive state for a predefined time interval, if the signal is not detected. The method also includes altering at least one of sensitivity and the predefined time interval if number of times the searching is performed without detecting the signal exceeds a threshold. Moreover, the method includes searching for the signal with at least one of altered sensitivity and altered predefined time when the receiver enters into an active state.