Method for transmitting information in quantum communication system. and device therefor

A transmitting terminal comprising:

• a transmitter for transmitting a radio signal;
• a receiver for receiving the radio signal;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor, and storing instructions of performing operations when executed by the at least one processor,
• wherein the operations comprise:
• receiving, from a receiving terminal, a signal for synchronizing with the receiving terminal;
• receiving system information from the receiving terminal;
• performing a random access procedure with the receiving terminal to establish an initial connection to the receiving terminal;
• receiving configuration information from the receiving terminal,
• the configuration information including information for the number of quantized qubit states obtained by quantizing state of qubit for transmission of classical information;
• modulating the classical information based on the qubit,
• the classical information being modulated based on a predefined mapping relationship based on (i) the classical information and (ii) the state of the qubit, and
• wherein the mapping relationship includes mapping relationships between (i) bit values that the classical information may have and (ii) the quantized qubit states;
• and
• transmitting, to the receiving terminal, the qubit based on the modulated classical information.

A receiving terminal comprising:

• a transmitter for transmitting a radio signal;
• a receiver for receiving the radio signal;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor, and storing instructions of performing operations when executed by the at least one processor,
• wherein the operations comprise:
• transmitting, to a transmitting terminal, a signal for synchronizing with the transmitting terminal;
• transmitting system information to the transmitting terminal;
• performing a random access procedure with the transmitting terminal to establish an initial connection of the transmitting terminal to receiving terminal;
• transmitting configuration information to the transmitting terminal,
• the configuration information including information for the number of quantized qubit states obtained by quantizing state of qubit for transmission of classical information;
• and
• receiving, from the transmitting terminal, the qubit generated by modulating the classification information based on a predefined mapping relationship based on (i) the classical information and (ii) the state of the qubit,
• wherein the mapping relationship includes mapping relationships between (i) bit values that the classical information may have and (ii) the quantized qubit states.