US Patent No. 10,560,962

METHOD AND APPARATUS FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM


Patent No. 10,560,962
Issue Date February 11, 2020
Title Method And Apparatus For Transmitting Data In Wireless Communication System
Inventorship Jinmin Kim, Seoul (KR)
Kiseon Ryu, Seoul (KR)
Assignee LG ELECTRONICS INC., Seoul (KR)

Claim of US Patent No. 10,560,962

1. A method for indicating, by an access point (AP) associated with a first basic service set (BSS), spatial reuse (SR) in a wireless LAN (WLAN) system, the method comprising:transmitting a trigger frame which requests uplink multi-user (UL MU) transmission of a plurality of stations (STAs); and
receiving an UL MU physical protocol data unit (PPDU) generated based on the trigger frame from the plurality of STAs,
wherein the trigger frame comprises SR indication information for indicating the SR of an overlapping BSS (OBSS) STA,
wherein a first high efficiency (HE)-signal (SIG) A field of the UL MU PPDU comprises SR support information generated based on the SR indication information,
wherein the SR support information comprises information about an interference level acceptable to the AP,
wherein the UL MU PPDU comprising a physical preamble and a data field sequentially,
wherein the physical preamble includes sequentially a L (legacy)-preamble and a High Efficiency (HE)-preamble,
wherein the HE-preamble includes sequentially an HE-Signal (SIG) A field, an HE-Short Training Field (STF) field, and an HE-Long Training Field (LTF) field,
wherein a first Inverse Discrete Fourier Transform (IDFT)/Discrete Fourier Transform (DFT) period is applied from the L-preamble to the HE-SIG A field and a second IDFT/DFT period is applied from the HE-STF field to the data field, and
wherein the second IDFT/DFT period is 4 times of the first IDFT/DFT period.