A power reduction method for a first communication device that can communicate with a second communication device in a synchronized fashion. The first communication device has an electronic module and the method includes generating a communication device shut down signal by the electronic module in order to shut down the communication device apart from the electronic module at a first moment in time, generating a communication device wake-up signal by the electronic module in order to switch on and start booting of the communication device at a second moment in time after the first moment in time, and generating a communication device synchronization signal by the electronic module in order to allow the communication device to restart communicating with the second communication device in the synchronized fashion at a third moment in time after the second moment in time.