Method of transmitting a transport block and apparatus using the same
Provided are a method and apparatus for determining a transport block size (TBS) when transmitting a transport block through a PUSCH by applying transport block processing over multiple slots (TBoMS) in a wireless communication system. The UE determines the TBS based on the number of resource elements (N RE ) allocated for the PUSCH, in this case, considers the number of slots for the TBoMS.
1. A method of transmitting a transport block (TB) by a user equipment (UE) in a wireless communication system, the method comprising:
determining a transport block size (TBS) of the TB; and
transmitting the TB having the TBS through a plurality of slots for a first physical uplink shared channel (PUSCH),
wherein the TBS is determined based on a number of resource elements (REs) allocated for the first PUSCH (N RE ),
wherein the N RE is a value obtained by multiplying all of i) a number of the plurality of slots (Z), ii) a smaller one between a predetermined fixed value and a number of resource elements allocated for PUSCH within a physical resource block (N′ RE ) and iii) a number of allocated physical resource blocks for the UE (n PRB ), and
wherein the N RE is based on a following equation,
N RE =Z ·min(156, N′ RE )· n PRB .
2. The method of claim 1 , further comprising:
receiving downlink control information (DCI) for scheduling the first PUSCH,
wherein a time domain resource assignment (TDRA) field included in the DCI informs of a specific row of a resource assignment table, and
wherein the specific row comprises information about the Z.
3. The method of claim 2 , wherein the specific row further informs of a slot offset between the DCI and the first PUSCH, a start symbol and allocation length of the first PUSCH, a mapping type of the first PUSCH, and a number of repetitions (K) to be applied to a transmission of the first PUSCH.
4. The method of claim 1 , wherein the transmission of the first PUSCH through the Z slots is repeated K times.
5. The method of claim 4 , wherein a same symbol allocation is applied to each of a number of slots (Z·K) obtained by multiplying the Z and the K related to repeated transmission of the first PUSCH.
6. The method of claim 5 , wherein a slot, in which at least one of symbols to be used for repeated transmission of the first PUSCH overlaps with a downlink symbol indicated by a higher layer configuration or a synchronization signal/physical broadcast channel block (SSB) symbol, is not counted in the number of the Z·K slots.
7. The method of claim 1 , wherein depending on whether the transport block is transmitted in a plurality of slots or is transmitted in one slot, a formula for determining the number of resource elements allocated for the first PUSCH (N RE ), which is used to determine the TBS, is different.
8. A user equipment (UE) comprising:
a transceiver for transmitting and receiving a radio signal; and
a processor operating in connected to the transceiver,
wherein the processor is configured to:
determine a transport block size (TBS) of the TB; and
transmit the TB having the TBS through a plurality of slots for a first physical uplink shared channel (PUSCH),
wherein the TBS is determined based on a number of resource elements (REs) allocated for the first PUSCH (N RE ),
wherein the N RE is a value obtained by multiplying all of i) a number of the plurality of slots (Z), ii) a smaller one between a predetermined fixed value and a number of resource elements allocated for PUSCH within a physical resource block (N′ RE ) and iii) a number of allocated physical resource blocks for the UE (n PRB ), and
wherein the N RE is based on a following equation,
N RE =Z ·min(156, N′ RE )· n PRB .
9. The UE of claim 8 , the processor is further configured to:
receive downlink control information (DCI) for scheduling the first PUSCH,
wherein a time domain resource assignment (TDRA) field included in the DCI informs of a specific row of a resource assignment table, and
wherein the specific row comprises information about the Z.
10. The UE of claim 9 , wherein the specific row further informs of a slot offset between the DCI and the first PUSCH, a start symbol and allocation length of the first PUSCH, a mapping type of the first PUSCH, and a number of repetitions (K) to be applied to a transmission of the first PUSCH.
11. The UE of claim 8 , wherein the transmission of the first PUSCH through the Z slots is repeated K times.
12. The UE of claim 11 , wherein a same symbol allocation is applied to each of a number of slots (Z·K) obtained by multiplying the Z and the K related to repeated transmission of the first PUSCH.
13. The UE of claim 12 , wherein a slot, in which at least one of symbols to be used for repeated transmission of the first PUSCH overlaps with a downlink symbol indicated by a higher layer configuration or a synchronization signal/physical broadcast channel block (SSB) symbol, is not counted in the number of the Z·K slots.
14. The UE of claim 8 , wherein depending on whether the transport block is transmitted in a plurality of slots or is transmitted in one slot, a formula for determining the number of resource elements allocated for the first PUSCH (N RE ), which is used to determine the TBS, is different.
15. A method of receiving a transport block (TB) by a base station (BS) in a wireless communication system, the method comprising:
transmitting downlink control information (DCI) for scheduling a first physical uplink shared channel (PUSCH) to a user equipment (UE); and
receiving the transport block having a specific transport block size (TBS) from the UE through a plurality of slots for the first PUSCH,
wherein the TBS is determined based on a number of resource elements (REs) allocated for the first PUSCH (N RE ),
wherein the N RE is a value obtained by multiplying all of i) a number of the plurality of slots (Z), ii) a smaller one between a predetermined fixed value and a number of resource elements allocated for PUSCH within a physical resource block (N′ RE ) and iii) a number of allocated physical resource blocks for the UE (n PRB ),
wherein the N RE is based on a following equation,
N RE =Z ·min(156, N′ RE )· n PRB ,
wherein a time domain resource assignment (TDRA) field included in the DCI informs of a specific row of a resource allocation table, and
wherein the specific row comprises information for the number of the plurality of slots (Z).