Uplink preemption in carrier aggregation/multi-connectivity mode

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

providing an indication to a base station (BS) of a capability of the UE to transmit on other component carriers (CCs) when a CC is preempted;

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

receiving, from the base station, an indication to preempt uplink transmission on a portion of the assigned resources comprising at least one symbol and at least one component carrier (CC); and

determining whether to transmit on the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC.

2. The method of claim 1 , further comprising preempting transmission on the portion of the assigned resources by dropping uplink transmission in the portion of the assigned resources.

3. The method of claim 1 , further comprising sending or dropping uplink transmission on the remaining assigned resources based on the determination.

4. The method of claim 1 , wherein the determination is based on a type of content of the other symbols.

5. The method of claim 4 , wherein the type of content comprises at least one of: a demodulation reference signal (DMRS), uplink control information (UCI), or a type of UCI.

6. The method of claim 4 , wherein the determination comprises determining to send uplink transmission on each of the at least one CC and the other CCs in the other symbols when the type of content is transmitted on that CC in one of the other symbols.

7. The method of claim 4 , wherein the determination comprises determining to send uplink transmission on both the at least one CC and the other CCs in the other symbols when the type of content is transmitted in the other CCs in one of the other symbols.

8. The method of claim 7 , wherein:

the type of content is not transmitted in the at least one CC in one of the other symbols, and

phase continuity will not be maintained.

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

receiving a resource assignment scheduling the UE for uplink transmission;

receiving an indication to preempt uplink transmission on a portion of the assigned resources comprising at least one symbol and at least one component carrier (CC);

determining whether to transmit on the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC;

wherein the determination is based on whether phase continuity will be maintained between the CCs after the preemption.

10. The method of claim 9 , wherein the determination comprises determining to send uplink transmission on the at least one CC and the other CCs in the other symbols when phase continuity will be maintained on at least one CC and the other CCs after the preemption.

11. The method of claim 9 , wherein the determination comprises determining to send or drop uplink transmission on the at least one CC and the other CCs in the other symbols when phase continuity will be maintained on only some of the CCs after the preemption.

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

receiving a resource assignment scheduling the UE for uplink transmission;

receiving an indication to preempt uplink transmission on a portion of the assigned resources comprising at least one symbol and at least one component carrier (CC);

determining whether to transmit on the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC, wherein the determination is based on at least one of: whether the at least one CC and the other CCs are inter-band or intra-band or whether the at least one CC and the other CCs are frequency contiguous or frequency non-contiguous.

13. The method of claim 12 , wherein the determination comprises determining to drop uplink transmission in the at least one symbol on another CC when the at least one CC and the other CC are intra-band and frequency contiguous.

14. The method of claim 12 , wherein the determination comprises determining to send uplink transmission in the at least one symbol on the other CCs when the at least one CC and the other CCs are frequency non-contiguous.

15. A method for wireless communication by a base station (BS), comprising:

receiving an indication from a user equipment (UE) indicating a capability of the UE to transmit on other component carriers (CCs) when transmission on a CC is preempted;

and

scheduling the UE for uplink transmission based on the indication comprising:

transmitting, to the UE, a resource assignment scheduling the UE for uplink transmission;

transmitting, to the UE, an indication to preempt uplink transmission on a portion of assigned resources comprising at least one symbol and at least one component carrier (CC); and

receiving uplink transmission from the UE via the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC.

16. An apparatus for wireless communications, comprising:

means for providing an indication to another apparatus of a capability of the apparatus to transmit on other component carriers (CCs) when a CC is preempted;

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

means for receiving an indication to preempt uplink transmission on a portion of the assigned resources comprising at least one symbol and at least one component carrier (CC); and

means for determining whether to transmit on the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC.

17. The apparatus of claim 16 , further comprising means for preempting transmission on the portion of the assigned resources by dropping uplink transmission in the portion of the assigned resources.

18. The apparatus of claim 16 , further comprising means for sending or dropping uplink transmission on the remaining assigned resources based on the determination.

19. The apparatus of claim 16 , wherein the determination is based on a type of content of the other symbols.

20. An apparatus for wireless communications, comprising:

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

means for receiving an indication to preempt uplink transmission on a portion of the assigned resources comprising at least one symbol and at least one component carrier (CC); and

means for determining whether to transmit on the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC, wherein the determination is based on whether phase continuity will be maintained between the CCs after the preemption.

21. The apparatus of claim 20 , wherein the determination comprises determining to send uplink transmission on the at least one CC and the other CCs in the other symbols when phase continuity will be maintained on at least one CC and the other CCs after the preemption.

22. The apparatus of claim 20 , wherein the determination comprises determining to send or drop uplink transmission on the at least one CC and the other CCs in the other symbols when phase continuity will be maintained on only some of the CCs after the preemption.

23. An apparatus for wireless communications, comprising:

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

means for receiving an indication to preempt uplink transmission on a portion of the assigned resources comprising at least one symbol and at least one component carrier (CC); and

means for determining whether to transmit on the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC, wherein the determination is based on at least one of: whether the at least one CC and the other CCs are inter-band or intra-band or whether the at least one CC and the other CCs are frequency contiguous or frequency non-contiguous.

24. The apparatus of claim 23 , wherein the determination comprises determining to drop uplink transmission in the at least one symbol on another CC when the at least one CC and the other CC are intra-band and frequency contiguous.

25. The apparatus of claim 23 , wherein the determination comprises determining to send uplink transmission in the at least one symbol on the other CCs when the at least one CC and the other CCs are frequency non-contiguous.

26. An apparatus for wireless communication, comprising:

means for receiving an indication from another apparatus indicating a capability of the another apparatus to transmit on other component carriers (CCs) when transmission on a CC is preempted; and

means for scheduling the another apparatus for uplink transmission based on the indication, comprising:

means for transmitting, to the another apparatus, a resource assignment scheduling the another apparatus for uplink transmission;

means for transmitting, to the another apparatus, an indication to preempt uplink transmission on a portion of assigned resources comprising at least one symbol and at least one component carrier (CC); and

means for receiving uplink transmission from the another apparatus via the remaining assigned resources comprising at least one of: other symbols subsequent the at least one symbol or other CCs than the at least one CC.