US 12,328,686 B2
Transmission power in multi-AP transmission using space reuse
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. 17/908,092
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jan. 7, 2021, PCT No. PCT/KR2021/000194
§ 371(c)(1), (2) Date Aug. 30, 2022,
PCT Pub. No. WO2021/177587, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 10-2020-0026237 (KR), filed on Mar. 2, 2020.
Prior Publication US 2023/0105964 A1, Apr. 6, 2023
Int. Cl. H04W 52/36 (2009.01); H04W 52/24 (2009.01)
CPC H04W 52/367 (2013.01) [H04W 52/242 (2013.01); H04W 52/243 (2013.01); H04W 52/245 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, by a first access point (AP) from a second AP, a first physical protocol data unit including information related to an acceptable receiver interference level (ARIL) value of the second AP,
wherein the first 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 (SIG) field being contiguous to the RL-SIG field,
wherein the L-SIG field includes a length field 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 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 first 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 first PPDU,
wherein the first AP and the second AP belong to a same BSS, wherein the second AP operates as a sharing AP which has obtained the TXOP based on channel contention with the first AP within the BSS;
obtaining, by the first AP, a first transmission power value of a first physical protocol data unit (PPDU) that the shared first AP transmits to a first non-AP STA associated with the first AP;
receiving, by the first AP, a first received signal strength indicator (RSSI) value of the first PPDU calculated by the second AP from the second AP; and
transmitting, by the first AP, a second PPDU to a first non-AP STA,
wherein a second transmission power value of the second PPDU is determined by the first AP based on the first RSSI value, the first transmission power value, and the ARIL value.