Random access resource unit allocation for a multiple bssid network

A wireless communication device belonging to a first basic service set (BSS), comprising:

• one or more processors;
• and
• a memory storing instructions that, when executed by the one or more processors, cause the wireless communication device to:
• receive, from an access point (AP) operating a plurality of BSSs that includes the first BSS, a physical layer protocol data unit (PPDU) carrying one or more trigger frames, each trigger frame allocating one or more random-access resource units (RUs) to wireless stations (STAs) associated with a respective BSS of a subset of the plurality of BSSs, each trigger frame including an association identifier (AID) value of zero;
• and
• transmit uplink (UL) data to the AP over the one or more random-access RUs allocated to the STAs associated with the first BSS responsive to the AID value of zero.