US Patent No. 10,764,924

WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL IN HIGH DENSITY ENVIRONMENT INCLUDING OVERLAPPED BASIC SERVICE SETS


Patent No. 10,764,924
Issue Date September 01, 2020
Title Wireless Communication Method And Wireless Communication Terminal In High Density Environment Including Overlapped Basic Service Sets
Inventorship Geonjung Ko, Gyeonggi-do (KR)
Juhyung Son, Gyeonggi-do (KR)
Jinsam Kwak, Gyeonggi-do (KR)
Woojin Ahn, Seoul (KR)
Assignee WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-Do (KR) SK TELE...

Claim of US Patent No. 10,764,924

1. A wireless communication terminal that communicates wirelessly, the terminal comprising:a transceiver; and
a processor,
wherein the processor is configured to:
receive a first PLCP Protocol Data Unit (PPDU) including a trigger frame through the transceiver, wherein the trigger frame triggers an uplink multiuser PPDU transmission of one or more wireless communication terminals in a first Basic Service Set (BSS) which is overlapped with a second BSS including the wireless communication terminal,
receive a physical layer header of a second PPDU which is transmitted in response to the trigger frame,
when predetermined conditions including that a transmission power of a third PPDU is below than a value which is determined based on a received signal strength of the first PPDU are met, transmit the third PPDU while the second PPDU being transmitted, and
when at least one of the predetermined conditions is not met, determine whether a channel through which the third PPDU to be transmitted is idle by using a static Clear Channel Assessment (CCA) threshold value and transmit the third PPDU according to whether the channel is idle while the second PPDU being transmitted,
wherein the static CCA threshold value is used for determining whether a channel is idle when the wireless communication terminal is receiving a PPDU transmitted from the second BSS,
wherein the physical layer header of the second PPDU comprises a spatial reuse field indicating a parameter, wherein the parameter is determined based on a magnitude of interference acceptable by a wireless communication terminal which transmits the first PPDU when receiving the second PPDU, and a transmission power of the first PPDU, and
wherein the predetermined conditions include that the transmission power of the third PPDU is below than a value which is determined based on a received signal strength of the first PPDU and the parameter.