METHODS AND APPARATUS FOR RANDOM ACCESS IN COMMUNICATION SYSTEM Russian patent published in 2016 - IPC H04L27/26 

FIELD: communication.

SUBSTANCE: invention relates to wireless communication and can be used for random access in communication system. Method for processing random access in a communication system comprises: receiving (1102), by a base station, a first Zadoff-Chu sequence and a second Zadoff-Chu sequence that are sent by a user equipment, wherein d_u of first Zadoff-Chu sequence is smaller than d_u of second Zadoff-Chu sequence, where d_u indicates peak shift image output base station, in relation to two-sided delay when frequency shift is , where T_SEQ is period of time, busy sequence Zadoff-Chu sequences; estimating (1103), by base station, an error range for a round trip delay (RTD) of user equipment according to first Zadoff-Chu sequence; and (1104) RTD of user equipment within range of error for RTD according to second Zadoff-Chu sequences.

EFFECT: technical result is providing network access of user equipment with frequency shift.

15 cl, 20 dwg, 3 tbl