Listen interval (LI) selection for WLAN client

摘要

The listen interval of a WLAN client is selected to have one of a plurality of values, including a start listen interval (SLI) and one or more longer listen intervals (e.g., transient listen interval (TLI), maximum listen interval (MLI)). The listen interval is set to SLI in response to (1) detecting that an applications processor of the WLAN client is in an awake state, (2) detecting transmit/receive activity on the wireless link, and (3) failing to detect an expected beacon signal on the wireless link. If the listen interval is set to MLI (or TLI) and the WLAN client fails to detect an expected beacon signal (beacon miss), the listen interval is temporarily set to SLI. If the WLAN client then detects an expected beacon signal before detecting a predetermined number of consecutive beacon misses, the listen interval is immediately returned to the original listen interval MLI (or TLI).

主权项

1. A method comprising:
periodically waking up a wireless local area network (WLAN) client at a first interval to detect a beacon signal, wherein beacon signals are periodically transmitted on a wireless link at a beacon interval, wherein the first interval is equal to a plurality of beacon intervals; determining that the WLAN client has not detected a beacon signal on the wireless link while periodically waking up at the first interval, and in response, waking up the WLAN client at a next beacon interval; and determining that the WLAN client has detected a beacon signal on the wireless link while waking up at the next beacon interval, and in response, periodically waking up the WLAN client at the first interval to detect beacon signals transmitted on the wireless link.