Methods and systems for aligning transmissions for intra-band carrier aggregation in sidelink communications
A user equipment may be configured to implement a procedure for aligning transmissions for intra-band carrier aggregation in sidelink communications. In some aspects, a user equipment may send one or more first transmissions to a second UE via a first sidelink component carrier, a first transmission of the one or more first transmissions including first user data. Further, the user equipment may send one or more second transmissions to a third UE via a second sidelink component carrier, the one or more first transmissions aligned with the one or more second transmissions and a second transmission of the one or more second transmissions including second user data and a repetition of a portion of the second user data.
1. A method of wireless communication at a first user equipment (UE) comprising:
sending one or more first transmissions to a second UE via a first sidelink component carrier, a first transmission of the one or more first transmissions including first user data; and
sending one or more second transmissions to a third UE via a second sidelink component carrier, the one or more first transmissions aligned with the one or more second transmissions and a second transmission of the one or more second transmissions including second user data and a repetition of a portion of the second user data.
2. The method of claim 1 , further comprising:
scheduling transmission of a signal or a channel after the first user data within the first transmission, wherein the repetition is transmitted using a plurality of symbols after the second user data that do not overlap with symbols used for the signal or the channel.
3. The method of claim 2 , wherein the signal or the channel includes a physical sidelink feedback channel (PSFCH).
4. The method of claim 2 , wherein the signal or the channel includes a sidelink reference signal.
5. The method of claim 1 , further comprising:
canceling transmission of a signal or a channel after the first user data within the first transmission;
wherein the repetition is transmitted using a plurality of symbols after the second user data.
6. The method of claim 5 , wherein the plurality of symbols include three symbols following a physical sidelink shared channel (PSSCH).
7. The method of claim 5 , wherein canceling the transmission of the signal or the channel comprises canceling the transmission of the signal or the channel based at least in part on a priority of the second user data or a priority of the signal or the channel.
8. The method of claim 1 , further comprising sending a sidelink repetition indication to the third UE, the sidelink repetition indication scheduling transmission of repetition information within the one or more second transmissions, and the repetition information includes the repetition of the portion of the second user data.
9. The method of claim 8 , wherein sending the sidelink repetition indication comprises determining to schedule the transmission of the repetition information based at least in part on one or more attributes of the third UE.
10. The method of claim 1 , wherein a redundancy version of the repetition of the portion of second user data is equal to a redundancy version of the second user data.
11. The method of claim 1 , wherein a redundancy version of the repetition of the portion of second user data is different from a redundancy version of the second user data.
12. The method of claim 1 , wherein the repetition is a first repetition and sending the one or more second transmissions to the third UE comprises:
sending, within sidelink control information of the second transmission, a redundancy value for a second repetition of a third transmission of the one or more second transmissions.
13. The method of claim 1 , wherein the repetition is a first repetition, and further comprising:
sending, to the third UE, repetition configuration information including a mapping for determining, from the first repetition of the second transmission, a redundancy value for a second repetition of a third transmission of the one or more second transmissions.
14. The method of claim 1 , wherein the repetition includes a portion of sidelink control information symbols and a physical sidelink shared channel (PSSCH) of the second transmission.
15. The method of claim 1 , wherein the repetition includes a portion of the second user data and/or sidelink control information (SCI) 2 .
16. The method of claim 1 , wherein the repetition is a first repetition, further comprising:
determining whether to receive data on a physical sidelink feedback channel (PSFCH) or transmit a second repetition of a physical sidelink shared channel (PSSCH) of a third transmission based at least in part on comparing a priority of the PSFCH to a priority of the PSSCH.
17. A first user equipment (UE) for wireless communication, comprising:
a memory storing computer-executable instructions; and
at least one processor coupled with the memory and configured to execute the computer-executable instructions to:
send one or more first transmissions to a second UE via a first sidelink component carrier, a first transmission of the one or more first transmissions including first user data; and
send one or more second transmissions to a third UE via a second sidelink component carrier, the one or more first transmissions aligned with the one or more second transmissions and a second transmission of the one or more second transmissions including second user data and a repetition of a portion of the second user data.
18. The first UE of claim 17 , wherein the at least one processor is further configured to:
schedule transmission of a signal or a channel after the first user data within the first transmission, wherein the repetition is transmitted using a plurality of symbols after the second user data that do not overlap with symbols used for the signal or the channel.
19. The first UE of claim 18 , wherein the signal or the channel includes a physical sidelink feedback channel (PSFCH).
20. The first UE of claim 19 , wherein the plurality of symbols include three symbols following a physical sidelink shared channel (PSSCH).
21. The first UE of claim 17 , wherein the at least one processor is further configured to:
cancel transmission of a signal or a channel after the first user data within the first transmission;
wherein the repetition is transmitted using a plurality of symbols after the second user data.
22. The first UE of claim 17 , wherein the at least one processor is further configured to:
send a sidelink repetition indication to the third UE, the sidelink repetition indication scheduling transmission of repetition information within the one or more second transmissions, and the repetition information includes the repetition of the portion of the second user data.
23. The first UE of claim 17 , wherein the repetition includes a portion of sidelink control information symbols and a physical sidelink shared channel (PSSCH) of the second transmission.
24. The first UE of claim 17 , wherein the repetition includes a portion of the second user data and/or sidelink control information (SCI) 2 .
25. A method of wireless communication at a first user equipment (UE), comprising:
receiving, from a second UE, a sidelink repetition indication to the first UE, the sidelink repetition indication scheduling transmission of repetition information within one or more first transmissions; and
receiving, from the second UE, the one or more first transmissions via a sidelink component carrier, the one or more first transmissions aligned with one or more second transmissions by the second UE to a third UE, and a first transmission of the one or more first transmissions including first user data and a repetition of a portion of the first user data.
26. The method of claim 25 , wherein the repetition is received contemporaneously with receipt of a physical sidelink feedback channel (PSFCH) at the third UE.
27. The method of claim 25 , wherein the repetition is received over three symbols following a physical sidelink shared channel (PSSCH).
28. The method of claim 25 , wherein the repetition includes a portion of sidelink control information symbols and a physical sidelink shared channel (PSSCH) of the second transmission.
29. The method of claim 25 , wherein the repetition includes a portion of the second user data and/or sidelink control information (SCI) 2 .
30. A first user equipment (UE) for wireless communication, comprising:
a memory storing computer-executable instructions; and
at least one processor coupled with the memory and configured to execute the computer-executable instructions to:
receive, from a second UE, a sidelink repetition indication to the first_UE, the sidelink repetition indication scheduling transmission of repetition information within one or more first transmissions; and
receive, from the second UE, the one or more first transmissions via a sidelink component carrier, the one or more first transmissions aligned with one or more second transmissions by the second UE to a third UE, and a first transmission of the one or more first transmissions including first user data and a repetition of a portion of the first user data.