Enhancement of PDCP duplication
The present disclosure relates to methods and devices for wireless communication including an apparatus, e.g., a UE and/or a base station. In one aspect, the apparatus may transmit a list of a plurality of CCs for a transmission of at least one PDCP PDU, the plurality of CCs corresponding to a plurality of indicated CCs. The apparatus may also transmit the at least one PDCP PDU on one or more CCs of the plurality of CCs. Additionally, the apparatus may determine whether to retransmit the at least one PDCP PDU, a retransmission of the at least one PDCP PDU being associated with a PDCP duplication procedure. The apparatus may also select one or more CCs of the plurality of CCs for the retransmission of the at least one PDCP PDU.
1. A method of wireless communication of a user equipment (UE), comprising:
transmitting a list of a plurality of component carriers (CCs) for a transmission of at least one packet data convergence protocol (PDCP) protocol data unit (PDU), the plurality of CCs corresponding to a plurality of indicated CCs;
transmitting the at least one PDCP PDU on one or more CCs of the plurality of CCs; and
determining whether to retransmit the at least one PDCP PDU, a retransmission of the at least one PDCP PDU being associated with a PDCP duplication procedure.
2. The method of claim 1 , further comprising:
selecting one or more CCs of the plurality of CCs for the retransmission of the at least one PDCP PDU.
3. The method of claim 2 , wherein at least one CC of the one or more CCs is associated with the retransmission of the at least one PDCP PDU when the at least one CC corresponds to an acknowledgement (ACK); or wherein the at least one CC is dissociated from the retransmission of the at least one PDCP PDU when the at least one CC corresponds to a negative ACK (NACK).
4. The method of claim 1 , further comprising:
receiving an indication of whether to retransmit the at least one PDCP PDU.
5. The method of claim 4 , wherein the indication identifies one or more additional CCs of the plurality of CCs for the retransmission of the at least one PDCP PDU.
6. The method of claim 4 , wherein the indication is associated with an acknowledgement (ACK) or a negative ACK (NACK).
7. The method of claim 4 , wherein the indication is received via a medium access control (MA) control element (MAC-CE).
8. The method of claim 1 , further comprising:
retransmitting the at least one PDCP PDU based on the determination whether to retransmit the at least one PDCP PDU.
9. The method of claim 8 , wherein the at least one PDCP PDU is retransmitted when a PDCP PDU duplication number is less than a maximum threshold or the retransmission of the at least one PDCP PDU is based on a power headroom report (PHR).
10. An apparatus for wireless communication of a user equipment (UE), comprising:
a memory; and
at least one processor coupled to the memory and configured to:
transmit a list of a plurality of component carriers (CCs) for a transmission of at least one packet data convergence protocol (PDCP) protocol data unit (PDU), the plurality of CCs corresponding to a plurality of indicated CCs;
transmit the at least one PDCP PDU on one or more CCs of the plurality of CCs; and
determine whether to retransmit the at least one PDCP PDU, a retransmission of the at least one PDCP PDU being associated with a PDCP duplication procedure.
11. The apparatus of claim 10 , wherein the at least one processor is further configured to:
select one or more CCs of the plurality of CCs for the retransmission of the at least one PDCP PDU.
12. The apparatus of claim 11 , wherein at least one CC of the one or more CCs is associated with the retransmission of the at least one PDCP PDU when the at least one CC corresponds to an acknowledgement (ACK); or wherein the at least one CC is dissociated from the retransmission of the at least one PDCP PDU when the at least one CC corresponds to a negative ACK (NACK).
13. The apparatus of claim 10 , wherein the at least one processor is further configured to:
receive an indication of whether to retransmit the at least one PDCP PDU.
14. The apparatus of claim 13 , wherein the indication identifies one or more additional CCs of the plurality of CCs for the retransmission of the at least one PDCP PDU.
15. The apparatus of claim 13 , wherein the indication is associated with an acknowledgement (ACK) or a negative ACK (NACK).
16. The apparatus of claim 13 , wherein the indication is received via a medium access control (MA) control element (MAC-CE).
17. The apparatus of claim 10 , wherein the at least one processor is further configured to:
retransmit the at least one PDCP PDU based on the determination whether to retransmit the at least one PDCP PDU.
18. The apparatus of claim 17 , wherein the at least one PDCP PDU is retransmitted when a PDCP PDU duplication number is less than a maximum threshold or the retransmission of the at least one PDCP PDU is based on a power headroom report (PHR).
19. The apparatus of claim 10 , wherein the at least one processor is further configured to:
receive a configuration of one or more uplink resources for the transmission of the at least one PDCP PDU, wherein the configuration is associated with a configured grant.
20. The apparatus of claim 10 , wherein the at least one processor is further configured to:
receive a configuration of one or more uplink resources for the retransmission of the at least one PDCP PDU, wherein the configuration is associated with a dynamic grant.
21. The apparatus of claim 10 , wherein the at least one processor is further configured to:
determine whether to activate one or more uplink resources for the retransmission of the at least one PDCP PDU.
22. The apparatus of claim 10 , wherein the at least one processor is further configured to:
transmit a scheduling request (SR) for the retransmission of the at least one PDCP PDU.
23. The apparatus of claim 10 , wherein the at least one processor is further configured to:
receive an indication of the plurality of CCs for the transmission of the at least one PDCP PDU.
24. The apparatus of claim 10 , wherein the determination whether to retransmit the at least one PDCP PDU is associated with a feedback of at least one physical layer.
25. The apparatus of claim 10 , wherein the determination whether to retransmit the at least one PDCP PDU is based on at least one of a power headroom or an expiration of a time period.
26. An apparatus for wireless communication of a base station, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive a list of a plurality of component carriers (CCs) for a transmission of at least one packet data convergence protocol (PDCP) protocol data unit (PDU), the plurality of CCs corresponding to a plurality of indicated CCs; and
determine whether the at least one PDCP PDU is retransmitted, a retransmission of the at least one PDCP PDU being associated with a PDCP duplication procedure.
27. The apparatus of claim 26 , wherein one or more CCs of the plurality of CCs are selected for the retransmission of the at least one PDCP PDU.
28. The apparatus of claim 26 , wherein the at least one processor is further configured to:
transmit an indication of whether to retransmit the at least one PDCP PDU.
29. The apparatus of claim 26 , wherein the at least one processor is further configured to:
receive a retransmission of the at least one PDCP PDU based on the determination whether the at least one PDCP PDU is retransmitted.
30. The apparatus of claim 29 , wherein the retransmission of the at least one PDCP PDU is received when a PDCP PDU duplication number is less than a maximum threshold or the retransmission of the at least one PDCP PDU is based on a power headroom report (PHR).