Trigger frame based method and device for communications

A first device, the first device comprising:

• a processor configured to:
• transmit, to a second device, a trigger frame that solicits at least one Physical layer Protocol Data Unit (PPDU) for uplink transmission,
• wherein the trigger frame includes a standard-compatible common info field that includes a trigger type field and a standard-compatible user info list field that includes at least one user info field,
• wherein the trigger frame includes a solicited Trigger-Based (TB) type indicator in a field in the trigger frame other than the trigger type field;
• and
• receive at least one PPDU from the second device in response to the solicited TB type indicator that was transmitted in the trigger frame by the first device.

A method for multi-link communications, the method comprising:

• at a first device, formatting a trigger frame that solicits at least one of a Trigger-Based (TB) Aggregated-Physical layer Protocol Data Unit (PPDU) and a PPDU for uplink transmission,
• wherein the trigger frame includes a standard-compatible common info field for a specific TB type and a standard-compatible user info list field for a specific TB type,
• wherein the trigger frame includes a solicited Trigger-Based (TB) type indicator in a field in the trigger frame other than the trigger type field;
• transmitting, to a second device, the trigger frame that solicits at least one of the TB A-PPDU (Aggregated-PPDU) and the PPDU for uplink transmission;
• and
• receiving, at the first device, at least one PPDU from the second device in response to the solicited TB type indicator that was transmitted in the trigger frame by the first device.