Granted Patent B2

US 12,581,534 · App. 18/519,068 · Granted Mar 17, 2026

Inventors: Minseok Noh (Gyeonggi-do, KR); Jinsam Kwak (Gyeonggi-do, KR); Juhyung Son (Gyeonggi-do, KR)

Assignee: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

H04W74/0808H04L1/1812H04L1/1887H04L5/0078H04L27/0006H04L27/26H04W72/0446H04W72/21H04L27/2613H04W16/14H04W84/12

Abstract

Claims (47)

1 . A wireless communication terminal, the terminal comprising:

a processor; and

a communication unit,

wherein the processor is configured to:

receive an uplink (UL) grant for uplink transmission,

wherein the UL grant includes an indicator related to a new data transmission or a data re-transmission according to whether the indicator is toggled,

determine a contention window size for the uplink transmission based on the indicator,

wherein the indicator is related to a specific subframe within a first uplink transmission burst,

perform the uplink transmission on a specific cell after sensing whether a channel of the specific cell is idle during ‘N’ or more slots,

wherein the first uplink transmission burst is a most recently transmitted uplink transmission burst before receiving the UL grant, after a channel access is performed using a contention window size,

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 indicator is toggled, and

when the indicator is toggled,

the indicator related to the specific subframe 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.

2 . The wireless communication terminal of claim 1 ,

wherein the ‘N’ is equal to or greater than ‘0’ and is a random number selected within the contention window size for the uplink transmission determined based on the indicator.

3 . The wireless communication terminal of claim 1 ,

when the indicator is not toggled,

the indicator indicates the data re-transmission, and

each of the contention window size for the every channel access priority class is increased to a next higher allowed value for each of the every channel access priority class.

4 . The wireless communication terminal of claim 1 ,

wherein each of the contention window size for the every channel access priority class is increased to the next higher allowed value for each of the every channel access priority class when a hybrid automatic repeat request (HARQ)-process Identity (ID) corresponding to the specific subframe and a HARQ-process ID included in the UL grant are not same.

5 . The wireless communication terminal of claim 1 ,

wherein the first uplink transmission burst includes a plurality of subframe, and

wherein the specific subframe is a first subframe among the plurality of subframe in the first uplink transmission burst.

6 . A method for a terminal to perform uplink transmission on a specific cell in a cellular wireless communication system, the method comprising:

receiving an uplink (UL) grant for uplink transmission,

wherein the UL grant includes an indicator related to a new data transmission or a data re-transmission according to whether the indicator is toggled;

determining a contention window size for the uplink transmission based on the indicator,

wherein the indicator is related to a specific subframe within a first uplink transmission burst; and

performing the uplink transmission on a specific cell after sensing whether a channel of the specific cell is idle during ‘N’ or more slots,

wherein the first uplink transmission burst is a most recently transmitted uplink transmission burst before receiving the UL grant, after a channel access is performed using a contention window size,

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 indicator is toggled, and

when the indicator is toggled,

the indicator related to the specific subframe 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.

7 . The wireless communication terminal of claim 6 ,

wherein the ‘N’ is equal to or greater than ‘0’ and is a random number selected within the contention window size for the uplink transmission determined based on the indicator.

8 . The wireless communication terminal of claim 6 ,

when the indicator is not toggled,

the indicator indicates the data re-transmission, and

each of the contention window size for the every channel access priority class is increased to a next higher allowed value for each of the every channel access priority class.

9 . The wireless communication terminal of claim 6 ,

wherein each of the contention window size for the every channel access priority class is increased to the next higher allowed value for each of the every channel access priority class when a hybrid automatic repeat request (HARQ)-process Identity (ID) corresponding to the specific subframe and a HARQ-process ID included in the UL grant are not same.

10 . The wireless communication terminal of claim 6 ,

wherein the first uplink transmission burst includes a plurality of subframe, and

wherein the specific subframe is a first subframe among the plurality of subframe in the first uplink transmission burst.

Assignments (1)

Priority Claims (8)

Continuity (5)

References Cited (190)