Method of transmitting and receving signal to a plurality of stations in wireless communication system and apparatus therefor

A station (STA) transmitting a signal to a plurality of STAs in a wireless communication system, comprising:

• a transceiving unit having one or more RF (radio frequency) chains and transmitting and receiving a signal;
• and
• a processor configured to control the transceiving unit,
• wherein the processor is further configured to
• generate a PPDU (physical protocol data unit) for a plurality of the STAs, and
• transmit the generated PPDU to a plurality of the STAs,
• wherein the PPDU is generated based on a first STA among a plurality of the STAs, and
• wherein the first STA corresponds to an STA that the sum of a length of a payload field and a length of a TRN (training) field is longest among a plurality of the STAs.