Multiuser transreceiving method in wireless communication system and device for same

A station (STA) in a wireless local area network (WLAN) system, comprising:

• an RF unit configured to transmit and receive RF signals;
• and
• a processor configured to control the RF unit,
• wherein the processor is further configured to generate a physical protocol data unit (PPDU) including a physical preamble and a data field and to transmit the PPDU,
• wherein, when a first data field is transmitted within a specific bandwidth, at least two 106-tone resource units are included in the specific bandwidth,
• when the two 106-tone resource units include first to fourth pilot tones respectively and 106 tones included in the 106-tone resource unit are positioned at indices 0 to 105 sequentially:
• wherein, in one 106-tone resource unit, the first pilot tone is positioned at the index 6, the second pilot tone is positioned at the index 32, the third pilot tone is positioned at the index 74, and the fourth pilot tone is positioned at the index 100, and
• wherein, in another 106-tone resource unit, the first pilot tone is positioned at the index 5, the second pilot tone is positioned at the index 31, the third pilot tone is positioned at the index 73, and the fourth pilot tone is positioned at the index 99.

A data transmission method of an access point (AP) in a wireless local area network (WLAN) system, comprising:

• generating a physical protocol data unit (PPDU) including a physical preamble and a data field;
• and
• transmitting the PPDU,
• wherein, when the data field is transmitted within a specific bandwidth, at least two 106-tone resource units are included in the specific bandwidth,
• when the two 106-tone resource units include first to fourth pilot tones respectively and 106 tones included in the 106-tone resource unit are positioned at indices 0 to 105 sequentially:
• wherein, in one 106-tone resource unit, the first pilot tone is positioned at the index 6, the second pilot tone is positioned at the index 32, the third pilot tone is positioned at the index 74, and the fourth pilot tone is positioned at the index 100, and
• wherein, in another 106-tone resource unit, the first pilot tone is positioned at the index 5, the second pilot tone is positioned at the index 31, the third pilot tone is positioned at the index 73, and the fourth pilot tone is positioned at the index 99.