Method and system of power management for electronic devices

A power management device of an electronic apparatus comprising a processor which contains processing algorithms, and a radio comprising an integrated circuit operating in different frequency ranges and different functional blocks having the possibility to be powered up separately, wherein the radio is associated and driven by the processor in order to determine a state mode of power consumption by:

• sending periodically at least one signal by the processor to the radio in order to control an incoming radio frequency transmission after an inactivity time of the radio;
• returning in standby mode of the processor;
• initiating a power up sequence by the radio;
• powering up one by one different functional blocks of the radio;
• determining of a measurement of a received power of the incoming radio frequency transmission once a RSSI detection functional block is powered;
• and
• determining a state mode of the power consumption to apply to all the functional blocks of the radio and the processor functions of a comparison of a measurement to a reference threshold.