Patent ID: 8631297

Claim:
A method of a base station including a processor and a transmitter for transmitting a signal comprising acknowledgement/negative acknowledgement (ACK/NACK) mapped in at least two orthogonal frequency division multiplexing (OFDM) symbols, the method comprising: determining, at the processor, an index of a first resource element group (REG) in a first OFDM symbol based on a first ratio calculated using a number of available resource element groups (REGs) in the first OFDM symbol and a number of available REGs in a second OFDM symbol, the index of the first REG corresponding to a frequency domain location; mapping, at the processor, the ACK/NACK to the first REG in the first OFDM symbol according to the determined index of the first REG; and transmitting, at the transmitter, the signal comprising the mapped ACK/NACK, wherein available REGs are REGs not assigned to Physical Control Format Indicator Channel (PCFICH).