Method and apparatus for performing channel coding and decoding in communication or broadcasting system
Disclosed is a method performed by a user equipment (UE) in a communication system, including receiving, from a base station, downlink control information including resource assignment information of a physical downlink shared channel (PDSCH), identifying a number of resource elements (REs) for the PDSCH based on the resource assignment information of the PDSCH, identifying a temporary transport block size (TBS) based on the number of REs for the PDSCH, identifying a TBS based on the temporary TBS, and receiving, from the base station, the PDSCH based on the TBS, wherein the number of REs for the PDSCH is identified by excluding a number of REs associated with a channel state information reference signal (CSI-RS) and a control channel.
1. A method performed by a user equipment (UE) in a communication system, the method comprising:
receiving, from a base station, downlink control information including resource assignment information of a physical downlink shared channel (PDSCH);
identifying a number of resource elements (REs) for the PDSCH based on a number of assigned symbols and a number of assigned physical resource blocks (PRBs), wherein a number of REs for a demodulation reference signal (DMRS) is excluded from the number of REs for the PDSCH;
identifying a temporary transport block size (TBS) based on the number of REs for the PDSCH, a modulation order, a coding rate, and a number of layers;
identifying a TBS based on
N
⋆
⌊
Temporary
T
B
S
N
⌋
,
where N is an integer; and
receiving, from the base station, the PDSCH based on the TBS.
2. The method of claim 1 , wherein the number of REs for the PDSCH is identified by further excluding at least one of a number of REs associated with a channel state information reference signal (CSI-RS) or a number of REs associated with a control channel.
3. The method of claim 1 , wherein a value of N is a multiple of 8.
4. The method of claim 1 , wherein a value of N is 8.
5. The method of claim 1 , wherein the TBS is identified based on the temporary TBS among TBS candidates included in a predefined TBS candidate set.
6. A method performed by a base station in a communication system, the method comprising:
identifying a transport block size (TBS) for a physical downlink shared channel (PDSCH);
transmitting, to a user equipment (UE), downlink control information including a number of assigned symbols and a number of assigned physical resource blocks (PRBs) for the PDSCH;
and
transmitting, to the UE, the PDSCH based on the identified TBS,
wherein the identified TBS is associated with a temporary TBS based on
N
⋆
⌊
Temporary
T
B
S
N
⌋
,
where N is an integer,
wherein the temporary TBS is associated with a number of resource elements (REs) for the PDSCH, modulation order, coding rate and a number of layers, and
wherein the number of REs for the PDSCH is associated with the number of assigned symbols and the number of assigned PRBs, wherein a number of REs for a demodulation reference signal (DMRS) is excluded for the number of REs for the PDSCH.
7. The method of claim 6 , wherein the number of REs for the PDSCH is identified by further excluding at least one of a number of REs associated with a channel state information reference signal (CSI-RS) or a number of REs associated with a control channel.
8. The method of claim 6 , wherein a value of N is a multiple of 8.
9. The method of claim 6 , wherein a value of N is 8.
10. The method of claim 6 , wherein the TBS is identified based on the temporary TBS among TBS candidates included in a predefined TBS candidate set.
11. A user equipment (UE) in a communication system, the UE comprising:
a transceiver; and
a controller configured to:
receive, from a base station, downlink control information including resource assignment information of a physical downlink shared channel (PDSCH),
identify a number of resource elements (REs) for the PDSCH based on a number of assigned symbols and a number of assigned physical resource blocks (PRBs), wherein a number of REs for a demodulation reference signal (DMRS) is excluded for the number of REs for the PDSCH,
identify a temporary transport block size (TBS) based on the number of REs for the PDSCH, a modulation order, a coding rate, and a number of layers,
identify a TBS based on
N
⋆
⌊
Temporary
T
B
S
N
⌋
,
where N is an integer, and
receive, from the base station, the PDSCH based on the TBS.
12. The UE of claim 11 , wherein the number of REs for the PDSCH is identified by further excluding at least one of a number of REs associated with a channel state information reference signal (CSI-RS) or a number of REs associated with a control channel.
13. The UE of claim 11 , wherein a value of N is a multiple of 8.
14. The UE of claim 11 , wherein a value of N is a 8.
15. The UE of claim 11 , wherein the TBS is identified based on the temporary TBS among TBS candidates included in a predefined TBS candidate set.
16. A base station in a communication system, the base station comprising:
a transceiver; and
a controller configured to:
identify a transport block size (TBS) for a physical downlink shared channel (PDSCH),
transmit, to a user equipment (UE), downlink control information including a number of assigned symbols and a number of assigned physical resource blocks (PRBs) for the PDSCH,
and
transmit, to the UE, the PDSCH based on the identified TBS,
wherein the identified TBS is associated with a temporary TBS based on
N
⋆
⌊
Temporary
T
B
S
N
⌋
,
where N is an integer,
wherein the temporary TBS is associated with a number of resource elements (REs) for the PDSCH, modulation order, coding rate and a number of layers, and
wherein the number of REs for the PDSCH is associated with the number of assigned symbols and the number of assigned PRBs, wherein a number of REs for a demodulation reference signal (DMRS) is excluded for the number of REs for the PDSCH.
17. The base station of claim 16 , wherein the number of REs for the PDSCH is identified by further excluding at least one of a number of REs associated with a channel state information reference signal (CSI-RS) or a number of REs associated with a control channel.
18. The base station of claim 16 , wherein a value of N is a multiple of 8.
19. The base station of claim 16 , wherein a value of N is 8.
20. The base station of claim 16 , wherein the TBS is identified based on the temporary TBS among TBS candidates included in a predefined TBS candidate set.