US 12,219,036 B2
Method and device for identifying packet in wireless LAN system
Dongguk Lim, Seoul (KR); Eunsung Park, Seoul (KR); Sunwoong Yun, Seoul (KR); and Jinsoo Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on May 26, 2023, as Appl. No. 18/202,452.
Application 18/202,452 is a continuation of application No. 17/742,097, filed on May 11, 2022, granted, now 11,706,322.
Application 17/742,097 is a continuation of application No. 17/256,868, granted, now 11,349,966, issued on May 31, 2022, previously published as PCT/KR2019/008042, filed on Jul. 2, 2019.
Claims priority of application No. 10-2018-0077337 (KR), filed on Jul. 3, 2018; and application No. 10-2018-0084380 (KR), filed on Jul. 19, 2018.
Prior Publication US 2023/0300225 A1, Sep. 21, 2023
Int. Cl. H04L 27/18 (2006.01); H04L 69/22 (2022.01); H04W 84/12 (2009.01)
CPC H04L 69/22 (2013.01) [H04L 27/18 (2013.01); H04W 84/12 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for use in a wireless local area network (WLAN) system, the method comprising:
receiving, by a receiving station (STA), a physical protocol data unit (PPDU),
wherein the PPDU includes a legacy signal field, a control signal field contiguous to the legacy signal field, and a data field,
wherein the legacy signal field is received through a first symbol, and the control signal field is received through a second symbol,
wherein the legacy signal field and the control signal field are generated based on binary phase shift keying (BPSK),
wherein four extra subcarriers are inserted for the legacy signal field, and indices of the four extra subcarriers are set as {−28, −27, +27, +28},
wherein the legacy signal field includes four pilot subcarriers,
wherein the legacy signal field is generated based on at least one first signal bit,
wherein the control signal field is generated based on at least one second signal bit,
wherein the at least one second signal bit includes at least one packet indication bit related to whether the PPDU is an extremely high throughput (EHT) PPDU, first information related to a transmission opportunity (TXOP), and second information related to a bandwidth of the PPDU;
wherein the control signal field is received based on a plurality of subcarriers with indices from −28 to +28, and the plurality of subcarriers include four pilot subcarriers and one subcarrier at an index of 0; and
determining, by the receiving STA, whether the PPDU is an EHT PPDU based on the control signal field.