Methods for uplink multiuser signaling and transmission

A station (STA) in a Wireless Local Area Network (WLAN), wherein the STA is to participate in an uplink (UL) multi-user (MU) simultaneous transmission in relation to an access point (AP) with one or more other STAs, the method comprising:

• a set of one or more processors;
• and
• a memory device, wherein the memory device stores instructions that when executed by the set of one or more processors cause the STA to:
• receive a first trigger frame from the AP that initiates the UL MU simultaneous transmission, wherein the trigger frame includes (1) a common attributes field to indicate attributes pertaining to a first UL MU frame transmitted to the AP during the UL MU simultaneous transmission that are common to the STA and the one or more other STAs and (2) a STA specific attributes field for the STA that indicates attributes pertaining to the first UL MU frame that are specific to the STA, wherein the common attributes field includes a cascade trigger subfield to indicate whether a second trigger frame is scheduled to be transmitted following the first trigger frame and during a designated period,
• determine whether the second trigger frame is scheduled to be transmitted following the first trigger frame and during the designated period based on the cascade trigger subfield, and
• transmit the first UL MU frame to the AP through a wireless medium during the UL MU simultaneous transmission based on the first trigger frame.