US 11,943,751 B2
Extended range transmission in wireless local area network
Dongguk Lim, Seoul (KR); Jinyoung Chun, Seoul (KR); Jinsoo Choi, Seoul (KR); and Eunsung Park, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Oct. 13, 2021, as Appl. No. 17/450,758.
Claims priority of application No. 10-2020-0132889 (KR), filed on Oct. 14, 2020.
Prior Publication US 2022/0116921 A1, Apr. 14, 2022
Int. Cl. H04W 84/12 (2009.01); H04L 5/00 (2006.01); H04L 27/18 (2006.01); H04W 72/044 (2023.01)
CPC H04W 72/044 (2013.01) [H04L 5/0044 (2013.01); H04L 27/18 (2013.01); H04W 84/12 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method 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 (L-SIG) field, a repeated L-SIG (RL-SIG) field which is a repeat of the L-SIG field, and a Universal Signal (U-SIG) field contiguous to the RL-SIG field,
wherein the PPDU is an extremely high throughput (EHT) PPDU,
wherein the L-SIG field includes a length field which is set to a value satisfying a condition that a remainder is zero when the length field is divided by three,
wherein the U-SIG field is received through first through fourth symbols,
wherein the first symbol includes a physical version identifier having a length of three bits,
wherein the physical version identifier is set to zero to identify the EHT PPDU,
wherein the second symbol includes information in which bit information of the first symbol is repeated,
wherein the fourth symbol includes information in which bit information of the third symbol is repeated, and
wherein the PPDU is configured based on one of a plurality of transmission modes including a first mode related to an Extended Range (ER) preamble and a second mode related to duplicate transmission; and
determining, by the receiving STA, a transmission mode of the PPDU based on a constellation mapping pattern of the first and second symbols,
wherein the constellation mapping pattern for the first mode has a first mapping pattern, and
wherein the constellation mapping pattern for the second mode has a second mapping pattern.