US Patent No. 10,560,899

PROGRAMMABLE HARDWARE SLEEP CYCLE CONTROLLER FOR 802.11 WIRELESS DEVICES SUPPORTING LOW-POWER


Patent No. 10,560,899
Issue Date February 11, 2020
Title Programmable Hardware Sleep Cycle Controller For 802.11 Wireless Devices Supporting Low-power
Inventorship Vishal Sharma, Irvine, CA (US)
Umesh Munj, Aliso Viejo, CA (US)
Assignee MICROCHIP TECHNOLOGY INCORPORATED, Chandler, AZ (US)

Claim of US Patent No. 10,560,899

1. A wireless device, comprising:a sleep mode controller circuit (SMC);
a processor;
a radio-frequency (RF) circuit; and
an oscillator communicatively coupled to the processor and the RF circuit;
wherein the SMC is configured to:
identify from a first received message through the RF circuit that there is no impending data traffic to be received from another wireless device;
based on the received message, put the wireless device into a power down mode, wherein the power down mode includes powering down the processor and powering down the RF circuit;
periodically check for a second received message, including:
powering on the RF circuit on a periodic basis;
determining whether the second received message indicates that there is impending data traffic to be received from another wireless device; and
based on a determination that that there is impending data traffic to be received from another wireless device, powering up the processor; and
the wireless device further includes a frame parser circuit configured to, while the processor is powered down:
periodically check for the second received message upon activation by the SMC:
during the check for the second received message, identify whether the second received message identifies a type of the wireless device; and
based on whether the second received message identifies the type of the wireless device, continue parsing the second received message.