Common time resources for multicasting

1 . A method for wireless communication at a user equipment (UE), comprising:

receiving, from a network entity, an indication of a set of time resources common to a set of UEs and available for communication of a multicast transmission from the network entity to two or more of the set of UEs, wherein the two or more of the set of UEs comprises the UE, and wherein the set of time resources of the indication is a subset of a plurality of time resources of a carrier configured for the UE, and wherein the indication is for a case where the UE operates in duplex mode and for a case where the UE operates in half-duplex mode;

receiving, from the network entity, a grant for the multicast transmission; and

receiving, from the network entity, the multicast transmission over a subset of the set of time resources of the indication, wherein the subset of the set of time resources of the indication is determined based at least in part on scheduling information associated with the grant and the indication of the set of time resources.

2 . The method of claim 1 , further comprising:

updating the set of time resources of the indication based at least in part on adjusting from communicating with the network entity in a first bandwidth part to communicating with the network entity in a second bandwidth part.

3 . The method of claim 1 , further comprising:

receiving a null indication of the set of time resources of the indication;

determining that each time resource within the plurality of time resources of the carrier configured for the UE is available for communication of a second multicast transmission from the network entity based at least in part on receiving the null indication of the set of time resources of the indication; and

receiving a second multicast transmission over a subset of the plurality of time resources of the carrier configured for the UE based at least in part on the determining.

4 . The method of claim 1 , wherein

each time resource of the set of time resources of the indication corresponds to a respective symbol within a slot, and

the plurality of time resources of the carrier configured for the UE spans the slot.

5 . The method of claim 1 , wherein

each time resource of the set of time resources of the indication corresponds to a respective slot within a frame or a sub-frame, and

the plurality of time resources of the carrier configured for the UE spans the frame or the sub-frame.

6 . The method of claim 1 , wherein the indication of the set of time resources comprises a bitmap or a start and length indicator value.

7 . The method of claim 1 , wherein a first slot and a second slot are associated with different sets of time resources common to the set of UEs and available for communication of the multicast transmission based at least in part on the first slot being associated with a first transmission mode and the second slot being associated with a second transmission mode.

8 . The method of claim 1 , wherein

a first slot is associated with a first transmission mode and a second slot is associated with a second transmission mode, and

each of the first slot and the second slot are associated with the set of time resources.

9 . The method of claim 1 , wherein the subset of the set of time resources of the indication comprises an earliest time resource of the set of time resources of the indication, and wherein the earliest time resource of the set of time resources of the indication differs from an earliest time resource of the plurality of time resources of the carrier configured for the UE.

10 . A method for wireless communication at a network entity, comprising:

transmitting, to a user equipment (UE), an indication of a set of time resources common to a set of UEs and available for communication of a multicast transmission from the network entity to two or more of the set of UEs, wherein the two or more of the set of UEs comprises the UE, and wherein the set of time resources of the indication is a subset of a plurality of time resources of a carrier configured for the UE, and wherein the indication is for a case where the UE operates in duplex mode and for a case where the UE operates in half-duplex mode;

transmitting, to the two or more of the set of UEs, a grant for the multicast transmission; and

transmitting, to the two or more of the set of UEs, the multicast transmission over a subset of the set of time resources of the indication, wherein the subset of the set of time resources of the indication for transmitting the multicast transmission is based at least in part on scheduling information associated with the grant.

11 . The method of claim 10 , further comprising:

updating the set of time resources of the indication based at least in part on adjusting from communicating with the UE in a first bandwidth part to communicating with the UE in a second bandwidth part.

12 . The method of claim 10 , further comprising:

transmitting a null indication of the set of time resources of the indication;

determining that each time resource within the plurality of time resources of the carrier configured for the UE is available for communication of a second multicast transmission from the network entity based at least in part on transmitting the null indication of the set of time resources of the indication; and

transmitting a second multicast transmission over a subset of the plurality of time resources of the carrier configured for the UE based at least in part on the determining.

13 . The method of claim 10 , wherein

each time resource of the set of time resources of the indication corresponds to a respective symbol within a slot, and

the plurality of time resources of the carrier configured for the UE spans the slot.

14 . The method of claim 10 , wherein

each time resource of the set of time resources of the indication corresponds to a respective slot within a frame or a sub-frame, and

the plurality of time resources of the carrier configured for the UE spans the frame or the sub-frame.

15 . The method of claim 10 , wherein the indication of the set of time resources of the indication comprises a bitmap or a start and length indicator value.

16 . The method of claim 10 , wherein a first slot and a second slot are associated with different sets of time resources common to the set of UEs and available for communication of the multicast transmission based at least in part on the first slot being associated with a first transmission mode and the second slot being associated with a second transmission mode.

17 . The method of claim 10 , wherein

a first slot is associated with a first transmission mode and a second slot is associated with a second transmission mode, and

each of the first slot and the second slot are associated with the set of time resources.

18 . The method of claim 10 , wherein the subset of the set of time resources of the indication comprises an earliest time resource of the set of time resources of the indication, and wherein the earliest time resource of the set of time resources of the indication differs from an earliest time resource of the plurality of time resources of the carrier configured for the UE.

19 . An apparatus for wireless communication at a user equipment (UE), comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive, from a network entity, an indication of a set of time resources common to a set of UEs and available for communication of a multicast transmission from the network entity to two or more of the set of UEs, wherein the two or more of the set of UEs comprises the UE, and wherein the set of time resources of the indication is a subset of a plurality of time resources of a carrier configured for the UE, and wherein the indication is for a case where the UE operates in duplex mode and for a case where the UE operates in half-duplex mode;

receive, from the network entity, a grant for the multicast transmission; and

receive, from the network entity, the multicast transmission over a subset of the set of time resources of the indication, wherein the subset of the set of time resources of the indication is determined based at least in part on scheduling information associated with the grant and the indication of the set of time resources.

20 . The apparatus of claim 19 , wherein the instructions are further executable by the processor to cause the apparatus to:

update the set of time resources of the indication based at least in part on adjusting from communicating with the network entity in a first bandwidth part to communicating with the network entity in a second bandwidth part.

21 . The apparatus of claim 19 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive a null indication of the set of time resources of the indication;

determine that each time resource within the plurality of time resources of the carrier configured for the UE is available for communication of a second multicast transmission from the network entity based at least in part on receiving the null indication of the set of time resources of the indication; and

receive a second multicast transmission over a subset of the plurality of time resources of the carrier configured for the UE based at least in part on the determining.

22 . The apparatus of claim 19 , wherein:

each time resource of the set of time resources of the indication corresponds to a respective symbol within a slot, and

the plurality of time resources spans the slot.

23 . The apparatus of claim 19 , wherein:

each time resource of the set of time resources of the indication corresponds to a respective slot within a frame or a sub-frame, and

the plurality of time resources of the carrier configured for the UE spans the frame or the sub-frame.

24 . The apparatus of claim 19 , wherein the indication of the set of time resources comprises a bitmap or a start and length indicator value.

25 . The apparatus of claim 19 , wherein a first slot and a second slot are associated with different sets of time resources common to the set of UEs and available for communication of the multicast transmission based at least in part on the first slot being associated with a first transmission mode and the second slot being associated with a second transmission mode.

26 . The apparatus of claim 19 , wherein:

a first slot is associated with a first transmission mode and a second slot is associated with a second transmission mode, and

each of the first slot and the second slot are associated with the set of time resources.

27 . The apparatus of claim 19 , wherein the subset of the set of time resources of the indication comprises an earliest time resource of the set of time resources of the indication, and wherein the earliest time resource of the set of time resources of the indication differs from an earliest time resource of the plurality of time resources of the carrier configured for the UE.

28 . An apparatus for wireless communication at a network entity, comprising:

a processor,

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit, to a user equipment (UE), an indication of a set of time resources common to a set of UEs and available for communication of a multicast transmission from the network entity to two or more of the set of UEs, wherein the two or more of the set of UEs comprises the UE, and wherein the set of time resources of the indication is a subset of a plurality of time resources of a carrier configured for the UE, and wherein the indication is for a case where the UE operates in duplex mode and for a case where the UE operates in half-duplex mode;

transmit, to the two or more of the set of UEs, a grant for the multicast transmission; and

transmit, to the two or more of the set of UEs, the multicast transmission over a subset of the set of time resources of the indication, wherein the subset of the set of time resources of the indication for transmitting the multicast transmission is based at least in part on scheduling information associated with the grant.

29 . The apparatus of claim 28 , wherein the instructions are further executable by the processor to cause the apparatus to:

update the set of time resources of the indication based at least in part on adjusting from communicating with the UE in a first bandwidth part to communicating with the UE in a second bandwidth part.

30 . The apparatus of claim 28 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit a null indication of the set of time resources;

determine that each time resource within the plurality of time resources of the carrier configured for the UE is available for communication of a second multicast transmission from the network entity based at least in part on transmitting the null indication of the set of time resources of the indication; and

transmit a second multicast transmission over a subset of the plurality of time resources of the carrier configured for the UE based at least in part on the determining.