US 12,414,050 B2
Measurement for space reuse in multi-AP system
Sungjin Park, Seoul (KR); Jeongki Kim, Seoul (KR); Jinsoo Choi, Seoul (KR); Namyeong Kim, Seoul (KR); Taewon Song, Seoul (KR); and Insun Jang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/801,712
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Dec. 22, 2020, PCT No. PCT/KR2020/018882
§ 371(c)(1), (2) Date Aug. 23, 2022,
PCT Pub. No. WO2021/172727, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 10-2020-0024586 (KR), filed on Feb. 27, 2020.
Prior Publication US 2023/0164700 A1, May 25, 2023
Int. Cl. H04W 52/24 (2009.01); H04W 24/10 (2009.01)
CPC H04W 52/242 (2013.01) [H04W 24/10 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method in a wireless local area network (WLAN) system, the method comprising:
receiving, by a sharing access point (AP), a management frame from an overlapping basic service set (OBSS) AP, wherein the management frame including an information element related to a Multi-AP capability of the OBSS AP, wherein the information element indicates at least one of coordinated spatial reuse (Co-SR) and coordinated beamforming (Co-BF);
based on the information element indicating the Co-SR, transmitting, by the sharing AP, a first measurement announcement frame for requesting measurement of a received signal strength indicator (RSSI) between a first station (STA) and the OBSS AP;
transmitting, by the sharing AP, a first measurement request frame for requesting a first path loss value, which is path loss information related to the OBSS AP and the first STA, and an acceptable receiver interference level (ARIL) value to the first STA;
based on the first measurement request frame, receiving, by the sharing AP, a first measurement report frame comprising the first path loss value and a first ARIL value of the first STA from the first STA; and
transmitting, by the sharing AP, first data to the first STA,
wherein the first data is included in a physical protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field being contiguous to the L-SIG field, and a first signal field being contiguous to the RL-SIG field,
wherein the L-SIG field includes a length field, and a value of the length field is set to satisfy a condition that a remainder is zero (0) when the value of the length field is divided by three (3), and
wherein the first SIG field includes first information related to a PPDU type, second information related to an identifier of a basic service set (BSS), third information indicating duration information related to a transmission opportunity (TXOP), fourth information related to whether the PPDU is sent in uplink (UL) or in downlink (DL), fifth information related to a bandwidth, and sixth information having a length of 3 bits and indicating a physical (PHY) version of the PPDU,
wherein the PPDU further includes a data field including information transmission power of the PPDU.