Device and method for transmitting data

A device for transmitting data, comprising:

• a memory for storing data to be transmitted to a portable terminal and storing maximum data processing calculation amounts of a plurality of portable terminals and reference and default entropies corresponding to each of the maximum data processing calculation amounts;
• a data compressor for compressing a data file read from the memory at a predetermined ratio depending on a state of data and configuring packets including the data, and outputting the packets;
• a packet scheduler for receiving the packets output by the data compressor, detecting the entropy of each packet to arrange the packets such that an entropy mean of the packets neighboring on any one side approximates to the set reference entropy, and setting a transmission order in accordance with the arranged order to output the packets in accordance with the set transmission order if a predetermined number of packets are input from the data compressor;
• a packet transmitter for transmitting the packets input from the packet scheduler to the receiving side portable terminals;
• and
• a controller for controlling the memory, the data compressor, the packet scheduler, and the packet transmitter, and retrieving the maximum data processing calculation amounts corresponding to the receiving side portable terminals and thereafter detecting a reference entropy corresponding to the retrieved maximum data processing calculation amount so as to set it in the packet scheduler if data transmission is requested from a receiving side portable terminals.