Patent ID: 8374281
Filing Date: 2013-02-12
Classification: H04J,H04L,H04W

Abstract:
1. A method for a user equipment (UE) to transmit a random access preamble sequence to a base station, the method comprising: transmitting the random access preamble sequence generated from a Constant Amplitude Zero Auto Correlation (CAZAC) sequence having a length (N) to the base station, wherein: the CAZAC sequence is cyclic shifted according to one of applicable cyclic shift values defined considering a value (M) representing a Doppler shift of one subcarrier spacing and a cyclic shift unit length (T), adjacent cyclic shift values among the applicable cyclic shift values are defined as a group having a length (S), a number of the applicable cyclic shift values is more than a multiplication of a number (G) of at least one group including the group and a number (P) of the adjacent cyclic shift values, if (N−G*S) is not less than (2M+T), and the length N is an integer equal to or greater than 1, the value M is an integer equal to or greater than 1, the cyclic shift unit length T is an integer equal to or greater than 1, the number P is an integer equal to or greater than 1, the length S is an integer equal to or greater than 1 and the number G is an integer equal to or greater than 1.