Patent ID: 9072082
Filing Date: 2015-06-30
Classification: H04W,Y02D

Abstract:
1. A method implemented in a wireless apparatus, the method comprising: buffering data for a wireless station that is in a sleep state; periodically transmitting a message to the wireless station via an access point using an access point link; setting up a direct link using tunneled direct link setup; receiving a response directly from the wireless station using the direct link; measuring link quality of the direct link based on the received response, wherein the measured link quality comprises a measured signal to noise ratio; transmitting a wakeup message to the wireless station via the access point using the access point link, wherein the wakeup message comprises a peer traffic indication frame; transmitting the buffered data to the wireless station over one of the access point link or the direct link based on at least the measured link quality; and subsequently switching from the direct link to the access point link or from the access point link to the direct link for transmitting the buffered data based on a subsequently measured link quality, wherein the direct link enters into a power save mode when the access point link is being used for transmitting the buffered data.