CONTROLLING GROUPS OF ELECTRICAL LOADS VIA MULTICAST AND/OR UNICAST MESSAGES

WIPO Patent Application WO/2018/009579

A8

A load control system (100) includes control devices for controlling electrical loads, such as a motorized window treatment (130) and lighting devices (112,122). The control devices include load control devices, such as a lighting device (112,122) for controlling an amount of power provided to a lighting load, and input devices, such as a remote control device (116) configured to transmit digital messages comprising lighting control instructions for controlling the lighting load via the lighting device. The remote control device (116) may communicate with the lighting device (112,122) via an intermediary device, such as a hub device (180). The remote control device (116) detects a user interface event, such as a button press or a rotation of the remote control device. The remote control device (116) or the hub (180) device determines whether to transmit digital messages to as unicast messages or multicast messages based on the type of user interface event detected. The load control devices may also include a motorized window treatment (130). The input devices may also include a remote control device (150), an occupancy sensor (160), a daylight sensor (170), and a network device (190), such as a smart phone, which may include a visual display (192). The remote control device (116,150) or the hub device (180) may transmit the digital message as a unicast message when the user interface event is determined to be an "on" event or an "off" event and the number of multicast messages transmitted within the predefined period of time is outside of a predefined threshold. The remote control device (116) may be a retrofit remote control device capable of covering a switch installed on the wall-mounted load control device (110). The remote control device (116,150) or the hub device (180) may calculate a delay between the transmission of each unicast message. The delay may be injected between unicast messages to help ensure that the communication link is idle prior to the device sending the next unicast message.

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BARD BENJAMIN (US)
OLSON THOMAS (US)
SAVERI III DAVID (US)
SHUKLA JAYKRISHNA (US)

PCT/US2017/040765

May 31, 2019

July 05, 2017

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LUTRON ELECTRONICS CO (US)

H04L12/28; H04W84/18

ALEXANDER, Ross, E. et al. (US)

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