Wireless communication system, base station, terminal and wireless communication method

A wireless communication system comprising a base station and a terminal, wherein

• said base station comprises:
• a base station side data generation portion configured to generate a number of sets of pseudorandom scramble data wherein the number of sets of the scramble data is more than a number obtained by multiplying a total number of the sub-channels used in said overall wireless communication system by a total number of subcarriers of the wireless communication system:
• a base station side memory configured to store the scramble data generated by the base station side data generation portion;
• a base station side upper layer control portion which outputs both transmission data for a terminal at an other end of a communication and sub-channel information specifying one or more sub-channels that are assigned to the terminal at the other end of the communication;
• a base station side lower layer control portion configured to, based on the sub-channel information, control the base station side memory to output a portion of the scramble data corresponding to the sub-channels that are assigned to the terminal at the other end of the communication;
• and
• a base station side scramble module configured to perform logical operation between the transmission data output from the base station side upper layer control portion and the portion of the scramble data output from the base station side memory based on a control by the base station side lower layer control portion,
• said terminal apparatus comprises:
• a terminal side data generation portion configured to, when establishing a communication connection with the base station, based on base station information received from the base station, generate the same scramble data as the base station;
• a terminal side memory configured to store the scramble data generated by the terminal side data generation portion;
• a terminal side upper layer control portion which outputs both transmission data for the base station at the other end of the communication and the sub-channel information;
• a terminal side lower layer control portion configured to, based on the sub-channel information received from the terminal side upper layer control portion, control the terminal side memory to output the portion of the scramble data of the terminal apparatus corresponding to the sub-channels that are assigned by the base station at the other end of the communication;
• and
• a terminal side scramble module configured to perform a logical operation between the transmission data output from the terminal side upper layer control portion and the portion of the scramble data output from the terminal side memory based on a control by the terminal side lower layer control portion.

A base station comprising:

• a base station side data generation portion configured to generate a number of sets of pseudorandom scramble data wherein the number of sets of the scramble data is more than a number obtained by multiplying a total number of the sub-channels used in a wireless communication system including said base station by a total number of the subcarriers of the wireless communication system;
• a base station side memory configured to store the scramble data generated by the base station side data generation portion;
• a base station side upper layer control portion which outputs both transmission data for a terminal at an other end of a communication and sub-channel information specifying one or more sub-channels that are assigned to the terminal at the other end of the communication;
• a base station side lower layer control portion configured to, based on the sub-channel information, control the base station side memory to output a portion of the scramble data corresponding to the sub-channels that are assigned to the terminal at the other end of the communication;
• and
• a base station side scramble module configured to perform a logical operation between the transmission data output from the base station side upper layer control portion and the portion of the scramble data output from the base station side memory based on a control by the base station side lower layer control portion.

A terminal comprising:

• a terminal side data generation portion configured to, when establishing a communication connection with a base station, based on base station information received from the base station, generate pseudorandom scramble data identical to scramble data at the base station;
• a terminal side memory configured to store the scramble data generated by the terminal side data generation portion;
• a terminal side upper layer control portion which outputs both transmission data for the base station at the other end of the communication and sub-channel information specifying one or more sub-channels assigned by the base station at the other end of the communication;
• a terminal side lower layer control portion configured to, based on the sub-channel information, control the terminal side memory to output a portion of the scramble data of the terminal corresponding to the sub-channels that are assigned by the base station at the other end of the communication;
• and
• a terminal side scramble module configured to perform a logical operation between the transmission data output from the terminal side upper layer control portion and the portion of the scramble data output from the terminal side memory based on a control by the terminal side lower layer control portion.

A wireless communication method for conducting a communication between a base station and a terminal, said method comprising:

• a first step of on the base station, generating a number of sets of pseudorandom scramble data wherein the number of sets of the scramble data is more than a number obtained by multiplying a total number of the sub-channels used in an overall wireless communication system including the base station and the terminal by a total number of the subcarriers of the wireless communication system;
• a second step of storing the scramble data generated in the first step;
• a third step of, based on sub-channel information, reading a portion of the scramble data corresponding to one or more of the sub-channels assigned to the terminal;
• a fourth step of conducting a logical operation between the portion of the scramble data read in the third step and transmission data;
• a fifth step of, by the terminal, when establishing a communication connection with the base station, based on base station information received from the base station, generating the same scramble data as the base station;
• a sixth step of storing the scramble data generated in the fifth step;
• a seventh step of, based on the sub-channel information received from the base station, reading a portion of the scramble data stored in the sixth step corresponding to the sub-channels that are assigned by the base station at the other end of the communication;
• and
• an eighth step of conducting a logical operation between the portion of the scramble data read in the seventh step and first data, wherein the first data is based on data received from the base station.