Patent ID: 8111732

Claim:
A method for a user equipment (UE) to transmit reference signal sequences to a base station, the method comprising: acquiring a reference signal sequence by using sequences divided into groups, wherein each group comprises sequences generated by using Zadoff-Chu (ZC) sequences having lengths of N 1 , N 2 , . . . , N M and having sequence indices of s 1 , s 2 , . . . , s M for each length respectively, wherein any of two sequence indices s i and s j (i and jε{1, 2, . . . , M}) of sequences within the same group are closest integer numbers satisfying the equation: s i /N i =s j /N j , wherein the reference signal sequence is acquired by using sequences of a group having a group index determined based on a cell identification, and transmitting the acquired reference signal sequence to the base station.