Multiplexing clients of different generations in trigger-based transmissions

A first wireless station, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the first wireless station to:
• receive a first physical layer convergence protocol (PLCP) protocol data unit (PPDU) compatible with both legacy wireless stations and non-legacy wireless stations, the first wireless station being a non-legacy wireless station, the first PPDU including a trigger frame configured to solicit an uplink transmission of a second PPDU, the trigger frame including a common information field and one or more user information fields including a first user information field for the first wireless station, the first user information field including a resource unit (RU) allocation field that includes an index to an RU allocation table configured for a legacy bandwidth;
• identify a non-legacy bandwidth associated with the second PPDU based at least in part on a value of a bandwidth field in the first PPDU, the non-legacy bandwidth being greater than a maximum legacy bandwidth associated with the legacy wireless stations;
• identify a value of a bit in the first user information field that is outside of the RU allocation field;
• identify whether a location of a first RU for the first wireless station is located in a first portion of a channel or a second portion of the channel based at least in part on the value of the bit, the channel having the identified non-legacy bandwidth;
• determine the location of the first RU within the identified first or second portion of the channel based on the index and the RU allocation table;
• and
• transmit the second PPDU via the first RU in response to the trigger frame.