US Patent No. 10,397,954

METHOD FOR PERFORMING BACKOFF IN WIRELESS CONNECTION SYSTEM THAT SUPPORTS UNLICENSED BANDS, AND APPARATUS SUPPORTING SAME


Patent No. 10,397,954
Issue Date August 27, 2019
Title Method For Performing Backoff In Wireless Connection System That Supports Unlicensed Bands, And Apparatus Supporting Same
Inventorship Seonwook Kim, Seoul (KR)
Joonkui Ahn, Seoul (KR)
Kijun Kim, Seoul (KR)
Hanbyul Seo, Seoul (KR)
Hyukjin Chae, Seoul (KR)
Assignee LG ELECTRONICS INC., Seoul (KR)

Claim of US Patent No. 10,397,954

7. An eNode-B (eNB) for performing a backoff operation in a wireless access system supporting an unlicensed band, the eNB comprising:a transmitter;
a receiver; and
a processor configured to:
control the transmitter and the receiver to perform the backoff operation,
set a backoff counter value for performing the backoff operation,
when a current subframe corresponds to a backoff permitted duration, decrease the backoff counter value by 1 based on whether the unlicensed band is in an idle state or not after performing a carrier sensing (CS) operation in a CS unit,
when the current subframe does not correspond to the backoff permitted duration, maintain the backoff counter value without performing the CS operation, and
control the transmitter to transmit a reservation signal or data via a cell configured on the unlicensed band when the backoff counter value is zero.