US 11,729,821 B2
Wireless communication method using OFDMA random access and wireless communication terminal using same
Geonjung Ko, Seoul (KR); Juhyung Son, Gyeonggi-do (KR); Woojin Ahn, Gyeonggi-do (KR); and Jinsam Kwak, Gyeonggi-do (KR)
Assigned to WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-Do (KR); and SK TELECOM CO., LTD., Seoul (KR)
Filed by WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-do (KR); and SK TELECOM CO., LTD., Seoul (KR)
Filed on May 12, 2022, as Appl. No. 17/742,406.
Application 17/742,406 is a continuation of application No. 17/127,008, filed on Dec. 18, 2020, granted, now 11,368,987.
Application 17/127,008 is a continuation of application No. 16/693,203, filed on Nov. 22, 2019, granted, now 10,904,927, issued on Jan. 26, 2021.
Application 16/693,203 is a continuation of application No. 16/452,448, filed on Jun. 25, 2019, granted, now 10,536,979, issued on Jan. 14, 2020.
Application 16/452,448 is a continuation of application No. PCT/KR2017/015535, filed on Dec. 27, 2017.
Claims priority of application No. 10-2016-0179781 (KR), filed on Dec. 27, 2016; application No. 10-2017-0000020 (KR), filed on Jan. 2, 2017; application No. 10-2017-0000437 (KR), filed on Jan. 2, 2017; application No. 10-2017-0002195 (KR), filed on Jan. 6, 2017; and application No. 10-2017-0002720 (KR), filed on Jan. 9, 2017.
Prior Publication US 2022/0272772 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 28/06 (2009.01); H04W 84/12 (2009.01); H04W 72/0446 (2023.01); H04W 74/00 (2009.01); H04W 72/51 (2023.01); H04W 74/08 (2009.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04L 1/00 (2006.01); H04L 1/16 (2023.01)
CPC H04W 74/08 (2013.01) [H04L 1/00 (2013.01); H04L 1/16 (2013.01); H04L 5/0007 (2013.01); H04L 27/2602 (2013.01); H04L 27/2603 (2021.01); H04L 27/2666 (2013.01); H04W 28/06 (2013.01); H04W 72/0446 (2013.01); H04W 72/51 (2023.01); H04W 74/00 (2013.01); H04W 74/0858 (2013.01); H04W 84/12 (2013.01); H04L 5/0048 (2013.01); H04L 27/26025 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A wireless communication terminal that wirelessly communicates with a base wireless communication terminal, the wireless communication terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
set an OFDMA Contention Window (OCW) minimum value, which is a parameter indicating a minimum value of an OCW, to a value predetermined as a default value of the OCW minimum value, and an OCW maximum value, which is a parameter indicating a maximum value of the OCW, to a value predetermined as a default value of the OCW maximum value when the wireless communication terminal is a wireless communication terminal unassociated with the base wireless communication terminal,
set an integer selected from a range of 0 to a value equal to or smaller than the OCW as a counter for random access,
receive a trigger frame for triggering random access from the base wireless communication terminal using the transceiver, wherein the trigger frame allocates one or more resource units (RUs) for the random access,
decrement a value of the counter by the number of RUs through which the wireless communication terminal is capable of transmitting a trigger based physical layer protocol data unit (PPDU) according to a capability of the wireless communication terminal among the one or more RUs allocated for the random access,
randomly select any one of RUs through which the wireless communication terminal is capable of transmitting a trigger based PPDU according to the capability of the wireless communication terminal among the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and
attempt transmission to the base wireless communication terminal using the selected RU,
wherein the RU is a group of a plurality of subcarriers usable for orthogonal frequency division multiplexing (OFDM) communication,
wherein the value predetermined as the default value of the OCW minimum value and the value predetermined as the default value of the OCW maximum value are not values designated by the base wireless communication terminal.