Triggered transmission opportunity and multiple user ACK procedures in WLAN systems

A station (STA) for operation in a wireless local area network (WLAN), the STA comprising:

• a transmitter configured to transmit an uplink frame, to an access point (AP), wherein the uplink frame indicates a first traffic priority and a queue size;
• a receiver configured to receive a trigger frame, from the AP, subsequent to transmission of the uplink frame, wherein the trigger frame is a trigger for uplink multi-user (MU) data transmission and the trigger frame indicates a second traffic priority;
• and
• the transmitter further configured to, in response to receipt of the trigger frame, transmit an MU data unit comprising at least one aggregated media access control protocol data unit (A-MPDU) comprising a plurality of data units having a priority no less than the second traffic priority, wherein at least one of the plurality of data units has a priority greater than the second traffic priority and another one of the plurality of data units has a priority equal to the second traffic priority.

An access point (AP) comprising:

• a receiver configured to receive an uplink frame, from a station (STA), wherein the uplink frame indicates a first traffic priority and a queue size;
• a transmitter configured to transmit a trigger frame, to the STA, subsequent to reception of the uplink frame, wherein the trigger frame is a trigger for uplink multi-user (MU) data transmission and the trigger frame indicates a second traffic priority;
• and
• the receiver further configured to, in response to transmission of the trigger frame, receive an MU data unit comprising at least one aggregated media access control protocol data unit (A-MPDU), wherein the at least one A-MPDU comprises a plurality of data units having a priority no less than the second traffic priority, wherein at least one of the plurality of data units has a priority greater than the second traffic priority and another one of the plurality of data units has a priority equal to the second traffic priority.