Patent ID: 8094747

Claim:
A method of operating a base station, the method comprising: mapping a plurality of two-bit CCFI (Control Channel Format Indicator) into one selected from a first codebook and a second codebook, with the plurality of CCFI being selected from a group consisting of “00 ”, “01”, “10” and “11” , and with the first codebook comprising codewords selected from a group consisting of component codewords “000”, “011”, “101” and “110” corresponding to a designated CCFI and the second codebook comprising codewords selected from a component codeword group consisting of component codewords “111”, “100”, “010” and “001” corresponding to the designated CCFI; generating a sequence of codewords selected from either the first codebook or the second codebook by repeating the selected component codeword for predetermined times, with the predetermined times being determined by a flooring of quotient [4K/3],where K is a number of resource units occupying one Orthogonal Frequency Division Multiplexing (OFDM) symbol and two neighboring subcarriers; generating a codeword by concatenating the sequence of the selected component codewords with the original designated CCFI bits; and transmitting the codeword carrying information of CCFI by the base station.