Patent ID: 8937893
Filing Date: 2015-01-20
Classification: H04W,Y02D

Abstract:
1. An apparatus for a first station (STA) in a basic service set (BSS), wherein the BSS includes the first STA, a second STA, and an access point (AP), the apparatus comprising: a controller configured to, subsequent to a first delivery traffic indication message (DTIM) being transmitted by the AP, selectively provide a trigger signal, wherein the trigger signal indicates a message should be transmitted by the first STA to the second STA via the AP, wherein the message includes a tunneled direct link (TDL) frame, and wherein the message requests that the second STA transmit a reply to the message directly to the first STA; and a transmitter configured to, in response to the trigger signal, (i) enter a sleep mode until less than a predetermined period remains preceding an expected transmission of a second DTIM by the AP and (ii) transmit the message within the predetermined period preceding the expected transmission of the second DTIM, wherein the second DTIM is transmitted by the AP subsequently to transmission of the first DTIM by the AP, and wherein no intervening DTIMs are transmitted by the AP between the first DTIM and the second DTIM.