Sequence generation and transmission method based on time and frequency domain transmission unit

A method of transmitting, by a user equipment, control information to a base station in a wireless communication system, the method comprising:

• determining an information symbol s representing an acknowledgement (ACK)/negative acknowledgement (NACK) to be transmitted to the base station;
• determining a frequency direction sequence c(k)={c(0), c(1), . . . c(Nk−1)}, wherein k=0, . . . , Nk−1 is a frequency domain subcarrier index and Nk is equal to a number of subcarriers included in a resource block allocated for an uplink control channel;
• determining a time direction sequence x(n)={x(0), x(1), . . . , x(Nn−1)}, wherein n=0, . . . , Nn−1 is a time domain symbol index and Nn is equal to a number of orthogonal frequency division multiplexing (OFDM) symbols for the ACK/NACK to be transmitted through the uplink control channel except for OFDM symbols having pilot signals associated with the uplink control channel;
• generating Nk*Nn information symbols s(k, n) based on s(k, n)=s*c(k)*x(n);
• and
• transmitting the Nk*Nn information symbols s(k, n) to the base station through the uplink control channel using Nk subcarriers included in the resource block in a frequency domain and Nn OFDM symbols for the ACK/NACK in a time domain.