IP Library › Granted Patent US 12695586
Granted Patent B2
US 12695586 · App. 18/305,309 · Granted Jul 28, 2026

Uplink preemption in carrier aggregation/multi-connectivity mode

Inventors: Seyedkianoush Hosseini (San Diego, CA); Amir Aminzadeh Gohari (Sunnyvale, CA); Peter Gaal (San Diego, CA); Wanshi Chen (San Diego, CA); Chih-Ping Li (San Diego, CA); Jing Jiang (San Diego, CA)
Assignee: QUALCOMM Incorporated
H04L5/0098H04L5/001H04L5/0037H04L5/0042H04L5/0044H04L5/0053H04L5/0087H04L5/0094H04W72/1268H04W76/36
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Quick Facts
Patent No.
US 12695586
App. No.
18/305,309
Granted
Jul 28, 2026
Kind
B2
Abstract

Certain aspects of the present disclosure relate to uplink preemption in certain systems, such as new radio (NR) systems, supporting carrier aggregation (CA) and/or multi-connectivity modes. A method for wireless communication, that can be performed by a user equipment (UE), generally includes receiving a resource assignment scheduling the UE for uplink transmission. The UE receives an indication to preempt uplink transmission on a portion of the assigned resources and determines whether to transmit on the remaining assigned resources. A method that can be performed by a base station (BS) generally includes receiving an indication from one or more UEs indicating, for each of a plurality of band combinations, a capability of the UE to transmit on a band when transmission on another band in the band combination is preempted and scheduling the one or more UEs for uplink transmission based on the indication.

Claims (46)

1 . A method for wireless communications by a user equipment (UE), the method comprising:

communicating, to a base station, a capability of the UE to transmit on a band when transmission on another band is preempted;

receiving a resource assignment scheduling the UE for uplink transmission from the UE;

receiving an indication to drop the uplink transmission on a portion of the assigned resources, wherein the indication to drop the uplink transmission includes an indication of at least one symbol and an indication of one or more cells in which to drop the uplink transmission;

transmitting an uplink reference signal on other symbols subsequent the at least one symbol; and

dropping an uplink transmission different than the uplink reference signal in the other symbols subsequent the at least one symbol.

2 . The method of claim 1 , further comprising:

determining to transmit or drop the uplink transmission on other cells than the one or more indicated cells; and

transmitting or dropping the uplink transmission on the other cells based on the determining to transmit or drop the uplink transmission on the other cells.

3 . The method of claim 2 , wherein the determining to transmit or drop the uplink transmission on the other cells comprises determining to drop the uplink transmission on the other cells in the at least one symbol and in the other symbols subsequent the at least one symbol.

4 . The method of claim 2 , wherein the determining to transmit or drop the uplink transmission on the other cells comprises determining to drop the uplink transmission on the other cells in the at least one symbol and to transmit the uplink transmission on the other cells in the other symbols subsequent the at least one symbol.

5 . The method of claim 1 , further comprising determining to transmit or drop the uplink transmission on the other symbols subsequent the at least one symbol based on whether phase continuity can be maintained.

6 . The method of claim 5 , wherein the determining to transmit or drop the uplink transmission on the other symbols subsequent the at least one symbol comprises determining to transmit the uplink reference signal on the other symbols subsequent the at least one symbol in response to determining phase continuity can be maintained.

7 . The method of claim 1 , wherein the uplink reference signal is a demodulation reference signal (DMRS) and the uplink transmission is uplink control information (UCI).

8 . A user equipment, comprising:

one or memories storing computer executable code; and

one or more processors configured to, individually or collectively, execute the computer executable code and cause the user equipment to:

communicate, to a base station, a capability of the user equipment to transmit on a band when transmission on another band is preempted;

receive a resource assignment scheduling the user equipment for uplink transmission;

receive an indication to drop the uplink transmission on a portion of the assigned resources, wherein the indication to drop the uplink transmission includes an indication of at least one symbol and an indication of one or more cells in which to drop the uplink transmission;

transmit an uplink reference signal on other symbols subsequent the at least one symbol; and

drop an uplink transmission different than the uplink reference signal in the other symbols subsequent the at least one symbol.

9 . The user equipment of claim 8 , wherein the one or more processors are configured to, individually or collectively, cause the user equipment further to:

determine to transmit or drop the uplink transmission on other cells than the one or more indicated cells; and

transmit or drop the uplink transmission on the other cells based on the determination to transmit or drop the uplink transmission on the other cells.

10 . The user equipment of claim 9 , wherein the one or more processors are configured to, individually or collectively, cause the user equipment to determine to drop the uplink transmission on the other cells in the at least one symbol and in the other symbols subsequent the at least one symbol.

11 . The user equipment of claim 9 , wherein the one or more processors are configured to, individually or collectively, cause the user equipment to determine to drop the uplink transmission on the other cells in the at least one symbol and to transmit the uplink transmission on the other cells in the other symbols subsequent the at least one symbol.

12 . The user equipment of claim 8 , wherein the one or more processors are further configured to, individually or collectively, cause the user equipment to determine to transmit or drop the uplink transmission on the other symbols subsequent the at least one symbol based on whether phase continuity can be maintained.

13 . The user equipment of claim 12 , wherein the one or more processors are configured to, individually or collectively, cause the user equipment to transmit the uplink on the other symbols subsequent the at least one symbol in response to determining phase continuity can be maintained.

14 . The user equipment of claim 8 , wherein the uplink reference signal is a demodulation reference signal (DMRS) and the uplink transmission is uplink control information (UCI).

15 . An apparatus for wireless communications, the apparatus comprising:

means for communicating, to a base station, a capability of the apparatus to transmit on a band when transmission on another band is preempted;

means for receiving a resource assignment scheduling the apparatus for uplink transmission;

means for receiving an indication to drop the uplink transmission on a portion of the assigned resources, wherein the indication to drop the uplink transmission includes an indication of at least one symbol and an indication of one or more cells in which to drop the uplink transmission;

means for transmitting an uplink reference signal on other symbols subsequent the at least one symbol; and

means for dropping an uplink transmission different than the uplink reference signal in the other symbols subsequent the at least one symbol.

16 . The apparatus of claim 15 , further comprising:

means for determining to transmit or drop the uplink transmission on other cells than the one or more indicated cells; and

means for transmitting or dropping the uplink transmission on the other cells based on the determining to transmit or drop the uplink transmission on the other cells.

17 . The apparatus of claim 16 , wherein the means for determining to transmit or drop the uplink transmission on the other cells comprises determining drop the uplink transmission on the other cells in the at least one symbol and in the other symbols subsequent the at least one symbol.

18 . A non-transitory computer-readable medium comprising computer-executable instructions that, when executed by a processor of a user equipment, cause the user equipment to:

communicate, to a base station, a capability of the user equipment to transmit on a band when transmission on another band is preempted;

receive a resource assignment scheduling the user equipment for uplink transmission;

receive an indication to drop the uplink transmission on a portion of the assigned resources, wherein the indication to drop the uplink transmission includes an indication of at least one symbol and an indication of one or more cells in which to drop the uplink transmission;

transmit an uplink reference signal on other symbols subsequent the at least one symbol; and

drop an uplink transmission different than the uplink reference signal in the other symbols subsequent the at least one symbol.