Apparatus and method for providing data service in a wireless system

A method of simultaneously transmitting data having the same or different priority levels to a mobile station in a mobile communication system, comprising the steps of:

• classifying transmission data streams by priority level and separating each transmission data stream into data streams of predetermined lengths according to characteristics of the data streams;
• segmenting the separated data streams according to a data rate;
• encoding the segmented data at a predetermined code rate, repeating code symbol sequences with higher priority levels, and puncturing code symbol sequences with lower priority levels, the number of repeated code symbols being equal to the number of punctured code symbols;
• and
• serially concatenating the repeated and punctured code symbol sequences.

An apparatus for simultaneously transmitting data with the same or different priority levels in a mobile communication system, comprising:

• a radio link protocol (RLP) portion for classifying transmission data streams by priority level and separating each transmission data stream into data streams of predetermined lengths according to characteristics and a data rate of the data streams;
• a multiplexer (MUX) for segmenting the separated data streams according to the data rate;
• a plurality of multiple quality control (MQC) channels for encoding the segmented data at a predetermined code rate, repeating code symbol sequences with higher priority levels, and puncturing code symbol sequences with lower priority levels, the number of repeated code symbols being equal to the number of punctured code symbols;
• and
• a serial concatenator for serially concatenating the repeated and punctured code symbol sequences.