US 12,219,644 B2
Method for changing channel in multi-links
Insun Jang, Seoul (KR); Jeongki Kim, Seoul (KR); Jinsoo Choi, Seoul (KR); Suhwook Kim, Seoul (KR); Sungjin Park, Seoul (KR); and Taewon Song, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/642,624
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Sep. 3, 2020, PCT No. PCT/KR2020/011838
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/049817, PCT Pub. Date Mar. 18, 2021.
Claims priority of provisional application 62/900,456, filed on Sep. 13, 2019.
Prior Publication US 2022/0346176 A1, Oct. 27, 2022
Int. Cl. H04W 76/20 (2018.01); H04W 76/11 (2018.01); H04W 76/15 (2018.01)
CPC H04W 76/20 (2018.02) [H04W 76/11 (2018.02); H04W 76/15 (2018.02)] 10 Claims
OG exemplary drawing
 
1. A method performed by at least one Access Point (AP) affiliated with an AP Multi-Link Device (MLD) in a wireless local area network system, the method comprising:
transmitting a first Beacon frame related to channel switching information, wherein the AP MLD comprises a first link and a second link, and the first Beacon frame is transmitted on the second link,
wherein the first Beacon frame comprises a link identifier (ID) for the first link, a channel switch count related to the first link and a channel switch time element related to the first link;
after transmitting the first Beacon frame, transmitting a second Beacon frame on the first link; and
transmitting a first physical protocol data unit (PPDU) based on the second Beacon frame,
wherein the first PPDU comprises a legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field being contiguous to the L-SIG field, a first control signal field being contiguous to the RL-SIG field, and a second control signal field being contiguous to the first control signal field,
wherein the L-SIG field comprises 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, and the remainder is used to differentiate the first PPDU from a High Efficiency (HE) PPDU,
wherein the RL-SIG field is a repeat of the L-SIG field,
wherein the first control signal has a length of two symbols,
wherein the first control signal comprises version-independent bits followed by version-dependent bits,
wherein the version-independent bits comprise a Physical (PHY) version Identifier having a length of three bits, and a value of the PHY version Identifier is used to identify a PHY version starting with Extremely High Throughput (EHT),
wherein the version-independent bits further comprise information related to an Identifier (ID) related to a Basic Service Set (BSS) color and information indicating a duration related to a transmission opportunity (TXOP),
wherein the version-dependent bits comprise punctured channel information related to preamble puncturing applied to the first PPDU,
wherein the second control signal field comprises a common control field and a user specific field being contiguous to the common control field, and the common control field comprises Resource Unit (RU) allocation information.