Controlling radio states for motion detection

A non-transitory computer-readable storage medium storing instructions that are operable when executed by a data processing apparatus to perform operations comprising:

• processing a first set of motion detection signals by operation of a radio subsystem of a wireless communication device in a first radio state, the motion detection signals based on wireless signals transmitted through a space;
• determining an amount of variation in the first set of motion detection signals based on values of a parameter of the respective motion detection signals;
• updating a value of a counter in response to a determination that the amount of variation is greater than a first threshold;
• changing the radio subsystem from the first radio state to a second radio state based on a comparison of the value of the counter and a second threshold;
• and
• executing a motion detection process to detect motion of an object in the space based on a second set of motion detection signals processed by operation of the radio subsystem in the second radio state.

A wireless communication device comprising:

• a processor;
• a modem comprising a radio subsystem that is configured to receive motion detection signals and process the motion detection signals while operating in a radio state of the radio subsystem;
• and
• a memory storing instructions that are operable when executed by the processor to:
• determine an amount of variation in the motion detection signals based on values of a parameter of the respective motion detection signals;
• update a value of a counter in response to a determination that the variation is greater than a first threshold;
• and
• change the radio state of the radio subsystem based on a comparison of the value of the counter and a second threshold;
• and
• execute a motion detection process to detect motion of an object in a space based on motion detection signals processed by the radio subsystem in the changed radio state.