US 11,991,746 B2
Channel access method, device and system in unlicensed band
Minseok Noh, Seoul (KR); Jinsam Kwak, Gyeonggi-do (KR); and Juhyung Son, Gyeonggi-do (KR)
Assigned to WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-Do (KR)
Filed by WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-do (KR)
Filed on Dec. 10, 2021, as Appl. No. 17/548,442.
Application 17/548,442 is a continuation of application No. 16/924,142, filed on Jul. 8, 2020, granted, now 11,234,270.
Application 16/924,142 is a continuation of application No. 16/147,577, filed on Sep. 29, 2018, granted, now 10,743,344, issued on Aug. 11, 2020.
Application 16/147,577 is a continuation of application No. PCT/KR2017/003529, filed on Mar. 30, 2017.
Claims priority of application No. 10-2016-0038771 (KR), filed on Mar. 30, 2016; application No. 10-2016-0039811 (KR), filed on Mar. 31, 2016; application No. 10-2016-0044470 (KR), filed on Apr. 11, 2016; application No. 10-2016-0045238 (KR), filed on Apr. 13, 2016; application No. 10-2016-0057025 (KR), filed on May 10, 2016; application No. 10-2016-0065156 (KR), filed on May 27, 2016; application No. 10-2016-0079634 (KR), filed on Jun. 24, 2016; and application No. 10-2016-0088279 (KR), filed on Jul. 12, 2016.
Prior Publication US 2022/0167405 A1, May 26, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/04 (2023.01); H04L 1/1812 (2023.01); H04L 1/1867 (2023.01); H04L 5/00 (2006.01); H04L 27/00 (2006.01); H04L 27/26 (2006.01); H04W 72/0446 (2023.01); H04W 72/21 (2023.01); H04W 74/0808 (2024.01); H04W 16/14 (2009.01); H04W 84/12 (2009.01)
CPC H04W 74/0808 (2013.01) [H04L 1/1812 (2013.01); H04L 1/1887 (2013.01); H04L 5/0078 (2013.01); H04L 27/0006 (2013.01); H04L 27/26 (2013.01); H04W 72/0446 (2013.01); H04W 72/21 (2023.01); H04L 27/2613 (2013.01); H04W 16/14 (2013.01); H04W 84/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A wireless communication terminal, the terminal comprising:
a processor; and
a communication unit,
wherein the processor is configured to:
receive UL(uplink) grant for uplink transmission,
wherein the UL grant includes NDI(New Data Indicator) indicating a new data transmission or a data retransmission according to whether the NDI is toggled, and
wherein the NDI is related to a specific subframe in a first uplink transmission burst, and
perform the uplink transmission on a specific cell after sensing a channel on the specific cell at least for N slots while the channel on the specific cell is idle,
wherein the N(N≥0) is a random number within a contention window size determined based on the NDI,
wherein each of the contention window size for every channel access priority class is increased to a next higher allowed value for each of the every channel access priority class or is reset to a minimum value for each of the every channel access priority class according to whether the NDI is toggled, and
when the NDI is toggled,
the NDI indicates the new data transmission, and
each of the contention window size for the every channel access priority class is reset to the minimum value for each of the every channel access priority class.