US 11,943,809 B2
Method and device for controlling plurality of links in wireless local area network system supporting plurality of links
Insun Jang, Seoul (KR); Suhwook Kim, Seoul (KR); Jeongki Kim, Seoul (KR); Kiseon Ryu, Seoul (KR); Sungjin Park, Seoul (KR); Taewon Song, Seoul (KR); and Jinsoo Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/267,438
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Aug. 9, 2019, PCT No. PCT/KR2019/010043
§ 371(c)(1), (2) Date Feb. 9, 2021,
PCT Pub. No. WO2020/032664, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 10-2018-0094066 (KR), filed on Aug. 10, 2018; and application No. 10-2018-0106739 (KR), filed on Sep. 6, 2018.
Prior Publication US 2021/0329698 A1, Oct. 21, 2021
Int. Cl. H04W 74/08 (2009.01); H04W 72/0446 (2023.01); H04W 72/21 (2023.01); H04W 74/0816 (2024.01); H04W 80/02 (2009.01); H04W 84/12 (2009.01)
CPC H04W 74/0816 (2013.01) [H04W 72/0446 (2013.01); H04W 72/21 (2023.01); H04W 80/02 (2013.01); H04W 84/12 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method performed in a wireless local area network (WLAN) system, comprising:
transmitting, by a station (STA), an Association Request frame to an access point (AP), wherein the Association Request frame includes first capability information of the STA, wherein the first capability information includes a first field related to whether the STA supports a multi-link operation, a second field related to a first link identifier (ID) of the multi-link operation supported by the STA, and a third field related to whether the STA supports a communication in a 6 GHz band, wherein the STA supports a first link and a second link for the multi-link operation;
in response to the Association Request frame, receiving, by the STA, an Association Response frame from the AP, wherein the Association Response frame includes second capability information of the AP, wherein the second capability information includes a forth field related to whether the AP supports the multi-link operation, a fifth field related to a second link identifier (ID) of the multi-link operation supported by the AP, and a sixth field related to whether the AP supports a communication in the 6 GHz band;
receiving, by the STA from the AP, a physical protocol data unit (PPDU) through the first link,
wherein the PPDU includes a physical (PHY) preamble including a first control signal field and a second control signal field being contiguous to the first control signal field,
wherein the first control signal field includes first bits related to a transmission opportunity (TXOP) of the PPDU, second bits related to a basic service set (BSS) color ID field of the PPDU, and
wherein the second control signal field includes third bits related to an intended receiver address of the PPDU;
setting, by the STA, a first intra-BSS network allocation vector (NAV) for the first link based on the second bits indicating a BSS color ID of the first STA and the third bits not indicating the STA; and
setting, by the STA, a second intra-BSS NAV for the second link based on the second bits indicating a BSS color ID of the first STA and the third bits not indicating the STA,
wherein a duration of the first intra-BSS NAV and a duration of the second intra-BSS NAV are set based on the first bits, and the duration of the first intra-BSS NAV is set to be same as the duration of the second intra-BSS NAV.