Patent ID: 11871483
Assignee: LUTRON TECHNOLOGY COMPANY LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  E | IPC E  H

Claim 0:
1. An electric load control system comprising:
a primary radio including primary radio receiver circuitry and primary microprocessor, the primary radio having a relatively lower-power consumption SLEEP state and a relatively higher power consumption ACTIVE state to receive an RF signal;
a secondary radio including secondary radio receiver circuitry and secondary microprocessor, the secondary radio having a relatively lower-power consumption SLEEP state and a relatively higher power consumption ACTIVE state to detect the presence of the RF signal, the secondary radio drawing less power when in the ACTIVE state than the primary radio when in the ACTIVE state;
an antenna;
a radio frequency (RF) switch having a first position to couple the antenna to the primary radio and a second position to couple the antenna to the secondary radio; and
control circuitry coupled to the antenna, the RF switch, the primary radio and the secondary radio, the control circuitry to:
cause a transition of the primary radio from the SLEEP state to the ACTIVE state responsive to the detection of the RF signal by the secondary radio;
cause a transition of the secondary radio from the ACTIVE state to the SLEEP state in which the secondary radio monitors the position of the RF switch;
cause the primary radio to transition the RF switch from the second position to the first position;
receive a message included in the RF signal using the primary radio;
cause the primary radio to transition the RF switch from the first position to the second position responsive to successful receipt of the message included in the RF signal;
cause a transition of the secondary radio from the SLEEP state to the ACTIVE state responsive to the transition of the RF switch to the second position; and
cause the primary radio to transition from the ACTIVE state to the SLEEP state.