Patent ID: 9144017
Filing Date: 2015-09-22
Classification: H04W,Y02D

Abstract:
1. A device for communicating with a base station, comprising: a circuit configured to generate energy based on an environmental input; an energy storage device coupled to the circuit and configured to store the energy; a clock circuit configured to generate a clock signal, the clock circuit configured to be powered on during an active state of the device and configured to be powered off during a sleep state of the device; a trigger circuit coupled to the energy storage device, the trigger circuit configured to generate a trigger signal that transitions the device from the sleep state into the active state when a level of the energy stored in the energy storage device reaches a threshold value; a transmitter coupled to the clock circuit, the transmitter configured to receive the clock signal and transmit a message to the base station in response to the generation of the trigger signal; and a receiver configured to receive an indication of a current time from the base station, the indication of the current time used by the device to communicate with a second base station.