Patent ID: 8259632

Claim:
A communication method in a Tunneled Direct Link Setup (TDLS) wireless network, the communication procedure comprising: transmitting, from an initiating station to a peer station through an access point, a TDLS setup request frame; transmitting, from the peer station to the initiating station through the access point, a TDLS setup response frame with status code ‘successful’; establishing a TDLS link by transmitting, from the initiating station to the peer station through the access point, a TDLS setup confirm frame for confirming receipt of the TDLS setup response frame; entering, by a first station, a Power Save Mode (PSM) remaining on the TDLS link by notifying a second station; buffering, by the second station, traffic for the first station; transmitting, from the second station to the first station through the access point, an indication frame if the traffice for the first station is buffered and one or more periods of an indication window have expired after a last service period, the indication frame indicating that the traffic is buffered at the second station and including a plurality of fields, each of the plurality of fields indicating a power save buffer state per access category (AC); and transmitting, from the second station to the first station, the buffered traffic using a U-APSD (Unscheduled-Atomatic Power Save Delivery) procedure; wherein the indication window indicates a minimum interval in Beacon intervals between successive indication frames, wherein the first station is one of the initiating station and the peer station and the second station is the other of the initiating station and the peer station, and wherein U-ASPD bits in a Quality of Service (QoS) Info subfield of a QoS Capability element carried in either the TDLS setup request frame or the TDLS setup response frame are set to a value for using a U-APSD procedure.