Physical layer preamble design for special packet types

An apparatus for wireless communication by a first wireless access point (AP), comprising:

• a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the apparatus to:
• generate a first portion of a first physical layer protocol data unit (PPDU) in accordance with a second PPDU to be transmitted by a second wireless AP, the first portion including at least a legacy signal field (L-SIG), a repeat of the L-SIG (RL-SIG) that immediately follows the L-SIG and a universal signal field (U-SIG) that immediately follows the RL-SIG and carries information for interpreting one or more subsequent fields of a second portion, the U-SIG including BSS color information to identify a multi-AP group, the second portion of the first PPDU including at least a short training field, a long training field, and a data field;
• and
• transmit the first PPDU, to a first receiving device, concurrently with transmission of the second PPDU by the second wireless AP, wherein the first and second PPDUs are transmitted as multi-AP transmissions coordinated between at least the first and the second APs, and wherein a beamformed portion of the first PPDU does not include the first portion of the first PPDU.