Method of communicating data in a wireless mobile communications system using message separation and mobile terminal for use with the same

A mobile terminal for communicating data in a wireless communications system, the mobile terminal comprising:

• a transceiver configured to transmit or receive the data;
• a memory configured to store the data transmitted or received via the transceiver or from an external source;
• and
• a processor configured to cooperate with the transceiver and the memory and to:
• transmit a random access preamble;
• receive a random access response in response to the random access preamble, wherein the random access response includes information related to at least one allocated radio resource which will be used for transmitting a next scheduled data, the next scheduled data being an RRC CONNECTION REQUEST message;
• determine at least one required radio resource for transmitting the next scheduled data;
• compare the determined at least one required radio resource with a threshold value;
• compare the determined at least one required radio resource with the at least one allocated radio resource only when the determined at least one required radio resource is larger than the threshold value;
• generate the next scheduled data by considering the at least one allocated radio resource and the determined at least one required radio resource, the next scheduled data being separately generated into two or more data groups when the at least one allocated radio resource is smaller than the determined at least one required radio resource;
• and
• control transmitting of the next scheduled data to a network, the next scheduled data including a specific identity for indicating a type of data included in the next scheduled data, and the specific identity being used only when the next scheduled data is separately generated into the two or more data groups and transmitted.