Patent ID: 8730901

Claim:
A terminal apparatus comprising: a receiver that receives information related to a set of sequences configured to be available in a cell for use by the terminal apparatus, the information being broadcasted from a base station; a selector that selects a sequence from the set of sequences available in the cell; a transmitter that random-access-preamble-transmits the selected sequence; wherein the set of sequences available in the cell include a sequence of r=a and a sequence of r=N−a, where r is a sequence number, a is an integer and N is a sequence length, which are defined by Equation 1 below: c r ⁡ ( k ) = exp ⁢ { - j ⁢ 2 ⁢ π ⁢ ⁢ r N ⁢ ( k ⁡ ( k + 1 ) 2 + qk ) } where k=0, 1, 2, . . . N−1, and q is an integer, and the sequence of r=a and the sequence of r=N−a are conjugate to each other.