Method of processing data block in wireless communication system and apparatus therefor

A user equipment for processing a data block in a wireless communication system, the user equipment comprising:

• a processor configured to generate tail bits of 18 bits by performing trellis termination in a turbo encoder included in the user equipment of code rate 1/5 containing a plurality of constituent encoders, the processor configured to deploy the tail bits of 18 bits to 5 encoded bit sequences of the turbo encoder based on a prescribed rule,
• wherein 4 tail bits are deployed to a systematic bit sequence among the 5 encoded bit sequences based on the prescribed rule, and 4 tail bits are deployed to each of specific 2 parity bit sequences among 4 parity bit sequences based on the prescribed rule, and
• wherein when the turbo encoder included in the user equipment of code rate 1/5 is used, a redundancy version (RV) starting position applied to the turbo encoder included in the user equipment is determined by an equation A in the following,
• k
• 0
• =
• R
• subblock
• TC
• ·
• (
• 2
• ·
• ⌈
• N
• cb
• 8
• ⁢
• ⁢
• R
• subblock
• TC
• ⌉
• ·
• rv
• idx
• +
• 4
• )
• [
• Equation
• ⁢
• ⁢
• A
• ]
• where, Ncb is a size of a code block, rvidx has values of 0, 1, 2, or 3, and RsubblockTC is a number of rows of a sub-block interleaver, and
• wherein the 4 parity bit sequences of the code block are transmitted initially as much as RsubblockTC, thereby enhancing performance.