US Patent No. 9,655,145

WIRELESS COMMUNICATION METHOD FOR ALLOCATING CLEAR CHANNEL, AND WIRELESS COMMUNICATION TERMINAL USING SAME


Patent No. 9,655,145
Issue Date May 16, 2017
Title Wireless Communication Method For Allocating Clear Channel, And Wireless Communication Terminal Using Same
Inventorship Juhyung Son, Gyeonggi-do (KR)
Jinsam Kwak, Gyeonggi-do (KR)
Geonjung Ko, Gyeonggi-do (KR)
Hyun oh Oh, Gyeonggi-do (KR)
Assignee Wilus Institute Of Standards And Technology Inc., Seoul (KR)

Claim of US Patent No. 9,655,145

1. A wireless communication method of a terminal, comprising:
receiving a radio signal of a specific channel;
measuring a signal strength of the received radio signal; and
determining whether the specific channel is busy based on the measured signal strength and BSS identifier information of the
radio signal,

wherein the determining is performed based on clear channel assessment (CCA) for the specific channel, and a CCA threshold
used for the CCA is set by the terminal to different levels according to whether the BSS identifier information of the radio
signal is the same as BSS identifier information of the terminal,

wherein when the BSS identifier information of the radio signal is the same as BSS identifier information of the terminal,
a first CCA threshold is used for the CCA, and when the BSS identifier information of the radio signal is different from BSS
identifier information of the terminal, a second CCA threshold having a higher level than the first CCA threshold is used
for the CCA, and

wherein when the BSS identifier information of the radio signal is different from the BSS identifier information of the terminal
and the signal strength of the received radio signal is below the second CCA threshold, the channel is determined to be idle.