Method and device for transmitting or receiving STF for new numerology in wireless LAN system

Inventors: Dongguk Lim (Seoul, KR); Jinyoung Chun (Seoul, KR); Jinsoo Choi (Seoul, KR); Eunsung Park (Seoul, KR); Insik Jung (Seoul, KR)

Assignee: LG ELECTRONICS INC.

H04L27/26025 H04L27/261 H04L27/2628

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Quick Facts

Patent No.: US 12706791
App. No.: 18/842,297
Granted: Aug 11, 2026
Kind: B2

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Abstract

Disclosed are a method and device for transmitting or receiving an STF for a new numerology in a wireless LAN system. A method performed by a first station (STA) in a wireless LAN system according to an embodiment disclosed herein may comprise the steps of: generating a physical layer protocol data unit (PPDU) including a non-legacy short training field (STF); and transmitting the generated PPDU to one or more second STAs. In the non-legacy STF field, a specific STF sequence may be applied for each transmission bandwidth of a PPDU type supporting the new numerology.

Claims (34)

1 . A method performed by a first station (STA) in a wireless local area network (WLAN) system, the method comprising:

generating a physical layer protocol data unit (PPDU) including a non-legacy short training field (STF) field; and

transmitting the generated PPDU to at least one second STA, wherein for a transmission on a 80 MHz bandwidth, a first sequence for the non-legacy STF field is based on {0, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 0, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, 0, 0, 0, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 0, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, 0}.

2 . The method of claim 1 , wherein:

the first sequency is given by S −1016:8:1016 ={0, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 0, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, 0, 0, 0, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 0, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, 0}*(1+j)/√2,

S −x:y:z represents coefficients of the non-legacy STF on every y sub-carrier indices from subcarrier indices x to z, and coefficients on other subcarrier indices are set to 0.

3 . The method of claim 1 , wherein:

for a transmission on a 40 MHz bandwidth, a second sequence for the non-legacy STF field is given by S −504:8:504 ={0, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 0, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, 0} *(1+j)/√2.

4 . The method of claim 1 , wherein:

a duration of the non-legacy STF field is determined based on a STF periodicity,

the STF periodicity is 3.2 us.

5 . The method of claim 1 , wherein:

based on the PPDU being a 20 MHz PPDU, a total number of subcarriers is 512,

based on the PPDU being a 40 MHz PPDU, the total number of subcarriers is 1024,

based on the PPDU being a 80 MHz PPDU, the total number of subcarriers is 2048,

based on the PPDU being a 160 MHz PPDU, the total number of subcarriers is 4096, and

based on the PPDU being a 320 MHz PPDU, the total number of subcarriers is 8192.

6 . The method of claim 5 , wherein for each of the 20 MHz PPDU, the 40 MHz PPDU, the 80 MHz PPDU, the 160 MHz PPDU, and the 320 MHz PPDU:

a subcarrier spacing is 39.0625 kHz,

a discrete Fourier transform (DFT) or inverse DFT (IDFT) period for a data symbol is 25.6 us.

7 . A first station (STA) device operating in a wireless local area network (WLAN) system, the device comprising:

at least one transceiver; and

at least one processor coupled with the at least one transceiver,

wherein the at least one processor is configured to:

generate a physical layer protocol data unit (PPDU) including a non-legacy short training field (STF) field; and

transmit, through the at least one transceiver, the generated PPDU to at least one second STA,

wherein for a transmission on a 80 MHz bandwidth, a first sequence for the non-legacy STF field is based on {0, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, −1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, −1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 0, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, 0, 0, 0, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 0, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, −1, −1, −1, 1, 1, 1, −1, 1, 1, 1, −1, 1, 1, −1, 1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, −1, 1, 1, 1, 1, −1, −1, −1, 1, −1, −1, −1, 1, −1, −1, 1, 0}.

8 . A second station (STA) device operating in a wireless local area network (WLAN) system, the device comprising:

at least one transceiver; and

at least one processor coupled with the at least one transceiver,

wherein the at least one processor is configured to:

receive, through the at least one transceiver, a physical layer protocol data unit (PPDU) from a first STA; and

based on a non-legacy short training field (STF) included in the PPDU, process the PPDU,