Method and apparatus for encoding or decoding channel code in a wireless communication system

1. A method for decoding a channel code by a communication apparatus in a wireless communication system, the method comprising:

decoding, by a processor of the communication apparatus, a first partial codeword having a first quality of service (QoS), the first partial codeword corresponds to a result of encoding a first partial block and a cyclic redundancy check (CRC) of the first partial block, the first partial block is included in a transport block (TB);

determining, by the processor, whether the CRC of the first partial block has been decoded successfully; and

if the CRC of the first partial block has been decoded successfully, decoding, by the processor, a first codeword corresponding to the first partial codeword, and

if the CRC of the first partial block has not been decoded successfully, decoding, by the processor, a second partial codeword having a second QoS, the second partial codeword corresponds to a result of encoding a second partial block and a CRC of the second partial block, the second partial block is included in the TB,

wherein a length of the second partial codeword is longer than a length of the first partial codeword, and

wherein a size of information bits of the second partial codeword is greater than a size of information bits of the first partial codeword.

2. The method according to claim 1 , further comprising:

if the CRC of the second partial block has been decoded successfully,

decoding a second codeword corresponding to the second partial codeword; and

determining whether a TB CRC has been decoded successfully.

3. The method according to claim 2 , further comprising:

if the TB CRC has been decoded successfully, generating an ACK signal.

4. The method according to claim 1 , further comprising:

if a TB CRC has been decoded successfully, generating an acknowledgement (ACK) signal.

5. The method according to claim 2 , further comprising if it is determined that the TB CRC has not been decoded successfully by decoding the second partial codeword, generating a negative ACK (NACK) signal.

6. The method according to claim 1 , wherein the first QoS includes a target packet error rate (PER).

7. The method according to claim 6 , wherein a target PER of the first partial codeword having the first QoS is set to be equal to or lower than a target PER of the first codeword.

8. A communication apparatus for decoding a channel code in a wireless communication system, the communication apparatus comprising:

a processor configured to:

decode a first partial codeword having a first quality of service (QoS), the first partial codeword corresponds to a result of encoding a first partial block and a cyclic redundancy check (CRC) of the first partial block, the first partial block is included in a transport block (TB);

determine whether the CRC of the first partial block has been decoded successfully;

if the CRC of the first partial block has been decoded successfully, decode a first codeword corresponding to the first partial codeword, and

if the CRC of the first partial block has not been decoded successfully, decode a second partial codeword having a second QoS, the second partial codeword corresponds to a result of encoding a second partial block and a CRC of the second partial block, the second partial block is included in the TB,

wherein a length of the second partial codeword is longer than a length of the first partial codeword, and

wherein a size of information bits of the second partial codeword is greater than a size of information bits of the first partial codeword.

9. The communication apparatus according to claim 8 , wherein the processor is further configured to:

if the CRC of the second partial block has been decoded successfully, decode a second codeword corresponding to the second partial codeword; and

determine whether a TB CRC has been decoded successfully.

10. The communication apparatus according to claim 9 , wherein if the processor determines that the TB CRC has not been decoded successfully by decoding the second partial codeword, the processor is configured to generate a negative ACK (NACK) signal.

11. The communication apparatus according to claim 9 , wherein the first QoS includes a target packet error rate (PER).

12. The communication apparatus according to claim 11 , wherein a target PER of the first partial codeword having the first QoS is set to be equal to or lower than a target PER of the first codeword.