Uplink data channel repetitions using multiple slot transmit time intervals
Apparatus, methods, and computer-readable media for improving uplink data channel repetitions using multiple slot transmit time intervals are disclosed herein. An example method for wireless communication at a user equipment (UE) includes receiving scheduling downlink control information (DCI) indicating, in a time domain resource allocation (TDRA) field, a scaling parameter for a transport block size (TBS) of a physical uplink shared channel (PUSCH) transmission for transmission as PUSCH repetitions over a repetition unit comprising a plurality of single repetitions. The example method also includes transmitting the PUSCH repetitions with scaling based on the scaling parameter indicated in the scheduling DCI.
1 . A method of wireless communication of a user equipment (UE), comprising:
receiving scheduling downlink control information (DCI) indicating, in a time domain resource allocation (TDRA) field, a scaling parameter for a transport block size (TBS) of a physical uplink shared channel (PUSCH) transmission for transmission as PUSCH repetitions over a repetition unit comprising a plurality of single repetitions, wherein the scaling parameter for the TBS of the PUSCH transmission indicates a factor for one of:
a first number of slots in the TBS for a PUSCH repetition Type A of the first number of PUSCH repetitions in the repetition unit, or
a second number of nominal repetitions in the TBS for a PUSCH repetition Type B of the second number of PUSCH repetitions in the repetition unit; and
transmitting the PUSCH repetitions with scaling based on the scaling parameter indicated in the scheduling DCI.
2 . The method of claim 1 , wherein the TDRA field comprises a PUSCH list for multiple PUSCH transmissions, the PUSCH list including a number of slots for TBS determination for each of the multiple PUSCH transmissions.
3 . The method of claim 2 , wherein the PUSCH list further comprises one or more of:
a physical downlink control channel (PDCCH) to PUSCH slot offset,
a mapping type,
a starting symbol,
a symbol length, or
a number of single repetitions for repetition.
4 . The method of claim 1 , wherein the scaling parameter applies to a PUSCH repetition type having slots for the PUSCH repetitions.
5 . The method of claim 1 , wherein the scaling parameter applies to a PUSCH repetition type having consecutive symbols for the PUSCH repetitions.
6 . The method of claim 1 , wherein the TBS of the PUSCH transmission is based on at least one of a maximum number of physical resource blocks (PRBs), a maximum number of slots, a maximum number of symbols, or a maximum modulation order.
7 . A method of wireless communication at a user equipment (UE), comprising:
determining a transport block size (TBS) of a physical uplink shared channel (PUSCH) transmission based at least in part on a set of PUSCH resources corresponding to a set of PUSCH repetitions for transmission over a repetition unit comprising a plurality of single repetitions, wherein the TBS is based on a total number of resource elements (REs) that is calculated based on a minimum of:
a largest average number of REs per slot multiplied by a number of the plurality of single repetitions, and
a number of per physical resource block (PRB) REs over the plurality of single repetitions; and
transmitting the PUSCH repetitions with the TBS determined over the repetition unit comprising the plurality of single repetitions.
8 . The method of claim 7 , wherein the UE applies a different overhead configuration to determine the TBS for the set of PUSCH repetitions than for a single PUSCH transmission.
9 . The method of claim 7 , wherein the number of per PRB REs is calculated based on a duration that is greater than 14 symbols.
10 . The method of claim 7 , wherein the PUSCH repetitions with the determined TBS is based on at least one of a maximum number of physical resource blocks (PRBs), a maximum number of slots, a maximum number of symbols, or a maximum modulation order.
11 . A method of wireless communication at a user equipment (UE), comprising:
determining a transport block size (TBS) of a physical uplink shared channel (PUSCH) transmission based at least in part on a set of PUSCH resources corresponding to a set of PUSCH repetitions for transmission over a repetition unit comprising a plurality of single repetitions;
multiplexing uplink control information (UCI) with multiple repetitions of the PUSCH transmission for transmission as PUSCH repetitions over the repetition unit comprising the plurality of single repetitions, wherein the UCI is multiplexed in a plurality of single repetitions that are a subset of the multiple repetitions, wherein the plurality of single repetitions occurs at a beginning of the multiple repetitions; and
transmitting the PUSCH repetitions with the UCI multiplexed over the multiple repetitions.
12 . The method of claim 11 , wherein the UCI comprises aperiodic channel state information (CSI).
13 . The method of claim 11 , wherein the UE spreads the UCI over the plurality of single repetitions beginning with a first repetition of the multiple repetitions.
14 . The method of claim 11 , wherein the UE repeats the UCI in each of the plurality of single repetitions beginning with a first repetition of the multiple repetitions.
15 . An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory, the at least one processor configured to:
receive scheduling downlink control information (DCI) indicating, in a time domain resource allocation (TDRA) field, a scaling parameter for a transport block size (TBS) of a physical uplink shared channel (PUSCH) transmission for transmission as PUSCH repetitions over a repetition unit comprising a plurality of single repetitions, wherein the scaling parameter for the TBS of the PUSCH transmission indicates a factor for one of:
a first number of slots in the TBS for a PUSCH repetition Type A of the first number of PUSCH repetitions in the repetition unit, or
a second number of nominal repetitions in the TBS for a PUSCH repetition Type B of the second number of PUSCH repetitions in the repetition unit; and
transmit the PUSCH repetitions with scaling based on the scaling parameter indicated in the scheduling DCI.
16 . The apparatus of claim 15 , wherein the TDRA field comprises a PUSCH list for multiple PUSCH transmissions, the PUSCH list including a number of slots for TBS determination for each of the multiple PUSCH transmissions.
17 . The apparatus of claim 16 , wherein the PUSCH list further comprises one or more of:
a physical downlink control channel (PDCCH) to PUSCH slot offset,
a mapping type,
a starting symbol,
a symbol length, or
a number of single repetitions for repetition.
18 . The apparatus of claim 15 , wherein the scaling parameter applies to PUSCH repetition type having slots for the PUSCH repetitions.
19 . The apparatus of claim 15 , wherein the scaling parameter applies to PUSCH repetition type having consecutive symbols for the PUSCH repetitions.
20 . The apparatus of claim 15 , wherein the TBS of the PUSCH transmission is based on at least one of a maximum number of physical resource blocks (PRBs), a maximum number of slots, a maximum number of symbols, or a maximum modulation order.
21 . An apparatus of wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory, the at least one processor configured to:
determine a transport block size (TBS) of a physical uplink shared channel (PUSCH) transmission based at least in part on a set of PUSCH resources corresponding to a set of PUSCH repetitions for transmission over a repetition unit comprising a plurality of single repetitions, wherein the TBS is based on a total number of resource elements (REs) that is calculated based on a minimum of:
a largest average number of REs per slot multiplied by a number of the plurality of single repetitions, and
a number of per physical resource block (PRB) REs over the plurality of single repetitions; and
transmit the PUSCH repetitions with the TBS determined over the repetition unit comprising the plurality of single repetitions.
22 . The apparatus of claim 21 , wherein the at least one processor is further configured to:
apply a different overhead configuration to determine the TBS for the set of PUSCH repetitions than for a single PUSCH transmission.
23 . The apparatus of claim 21 , wherein the number of per PRB REs is calculated based on a duration that is greater than 14 symbols.
24 . The apparatus of claim 21 , wherein the PUSCH repetitions with the determined TBS is based on at least one of a maximum number of physical resource blocks (PRBs), a maximum number of slots, a maximum number of symbols, or a maximum modulation order.
25 . An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory, the at least one processor configured to:
determine a transport block size (TBS) of a physical uplink shared channel (PUSCH) transmission based at least in part on a set of PUSCH resources corresponding to a set of PUSCH repetitions for transmission over a repetition unit comprising a plurality of single repetitions;
multiplex uplink control information (UCI) with multiple repetitions of the PUSCH transmission for transmission as PUSCH repetitions over the repetition unit comprising the plurality of single repetitions, wherein the UCI is multiplexed in a plurality of single repetitions that are a subset of the multiple repetitions, wherein the plurality of single repetitions occurs at a beginning of the multiple repetitions; and
transmit the PUSCH repetitions with the UCI multiplexed over the multiple repetitions.
26 . The apparatus of claim 25 , wherein the UCI comprises aperiodic channel state information (CSI).
27 . The apparatus of claim 25 , wherein the at least one processor is further configured to:
spread the UCI over the plurality of single repetitions beginning with a first repetition of the multiple repetitions.
28 . The apparatus of claim 25 , wherein the at least one processor is further configured to:
repeat the UCI in each of the plurality of single repetitions beginning with a first repetition of the multiple repetitions.