US 12,256,267 B2
Link adaptation control field transmission for low latency
Suhwook Kim, Seoul (KR); Jeongki Kim, Seoul (KR); and Jinsoo Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/762,675
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed May 28, 2020, PCT No. PCT/KR2020/006916
§ 371(c)(1), (2) Date Mar. 22, 2022,
PCT Pub. No. WO2021/066283, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 10-2019-0122634 (KR), filed on Oct. 2, 2019.
Prior Publication US 2022/0417793 A1, Dec. 29, 2022
Int. Cl. H04W 28/06 (2009.01); H04W 72/04 (2023.01); H04W 84/12 (2009.01)
CPC H04W 28/06 (2013.01) [H04W 72/04 (2013.01); H04W 84/12 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method in a wireless local area network system, the method comprising:
transmitting, by a station (STA), a first physical protocol data unit (PPDU) including a link adaptation (LA) control field,
wherein the first PPDU further includes a legacy signal (L-SIG) field, a repeated L-SIG field being contiguous to the L-SIG field, and a universal signal (U-SIG) field being contiguous to the repeated L-SIG field,
wherein the L-SIG field includes a length field whose value is set to satisfy a condition that a remainder is zero when the length field is divided by three,
wherein the remainder is used to differentiate the first PPDU from a High Efficiency (HE) PPDU,
wherein the U-SIG field includes three-bit information related to a physical version of the first PPDU,
wherein the LA control field includes a bit indicating whether the LA control field includes information related to low-latency traffic,
wherein the LA control field further includes information related to a number of spatial streams (NSSs), information related to a modulation and coding scheme (MCS), information related to a resource unit (RU) allocation, and information related to a bandwidth (BW),
wherein the LA control field further includes information related to a time point at which the low-latency traffic is stored in a buffer of the STA,
wherein the LA control field further includes information related to a recommended interval between respective trigger-based PPDUs (TB PPDUs) carrying the low-latency traffic, and
receiving, by the STA, a trigger frame including an allocation of a resource for the low-latency traffic, wherein the trigger frame is configured based on the LA control field; and
based on the trigger frame, transmitting, by the STA, a second PPDU which is configured as a TB PPDU.