Method for sending/receiving data in a wireless packet communication system in which there is simultaneous communication with various terminals

An apparatus configured for receiving data in a wireless communication system, the apparatus comprising:

• a receiving circuitry configured to receive a Physical layer Protocol Data Unit (PPDU) from a transmitter;
• and
• a processing circuitry configured to decode the PPDU, the PPDU including a first signal field and a plurality of second signal fields,
• wherein the first signal field in the PPDU is received via a first communication path that is common to a set of receivers to which the apparatus belongs,
• wherein at least one of the plurality of second signal fields in the PPDU is received via a second communication path that is specific to the apparatus,
• wherein a total length of the PPDU in a time domain is determined based on a maximum data length among a plurality of data lengths,
• wherein the plurality of data lengths are determined in accordance with a plurality of receivers based on a number of symbols used for the PPDU, each of the plurality of data lengths corresponding to a corresponding one of the plurality of receivers, and
• wherein the first signal field indicates the total length of the PPDU, and each of the plurality of second signal fields indicates a data length for a corresponding one of the plurality of receivers.