Apparatus for multiplexing/demultiplexing channel in code division multiple access communication system and method thereof

The present invention relates to a communication system using the HSDPA scheme, occurs to the transport block sent to any user terminal, by connecting the transport block, and generates a transport block set, is preset to the transport block set and then divided into a plurality of code blocks based on the number of bits, by adding the CRC bits to each of the plurality of code blocks to increase the HARQ efficiency by multiplexing a transport channel. Transport channel multiplexing, code block, CRC, ACK / NACK, HARQ