US Patent No. 10,536,979

WIRELESS COMMUNICATION METHOD USING OFDMA RANDOM ACCESS AND WIRELESS COMMUNICATION TERMINAL USING SAME


Patent No. 10,536,979
Issue Date January 14, 2020
Title Wireless Communication Method Using Ofdma Random Access And Wireless Communication Terminal Using Same
Inventorship Geonjung Ko, Gyeonggi-do (KR)
Juhyung Son, Gyeonggi-do (KR)
Woojin Ahn, Gyeonggi-do (KR)
Jinsam Kwak, Gyeonggi-do (KR)
Assignee WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-Do (KR) SK TELE...

Claim of US Patent No. 10,536,979

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 integer selected from a range of 0 to a value equal to or smaller than an OFDMA Contention Window (OCW) as a counter for random access,
receive a trigger frame for triggering random access using one or more resource units (RUs) allocated for the random access from the base wireless communication terminal using the transceiver,
decrement a value of the counter based on the one or more RUs allocated for the random access and a capability of the wireless communication terminal,
randomly select any one of RUs through which the wireless communication terminal is capable of transmitting a trigger based (TB) 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 uplink transmission and downlink transmission.