Patent ID: 8953518
Filing Date: 2015-02-10
Classification: H04B,H04W

Abstract:
1. A method for acquiring initial synchronization by a relay station in a wireless communication system, the method comprising: determining whether or not the initial synchronization is acquired; determining a start position of a frame using a peak of an autocorrelation signal detected based on both a preamble and a relay-amble (R-amble) received from a base station in the case in which the initial synchronization is not acquired; and determining the start position of the frame using a peak of an autocorrelation signal detected based on only the relay-amble received from the base station in the case in which the initial synchronization is acquired, wherein the preamble and R-amble are within the frame, wherein the preamble is within a downlink (DL) access zone within the frame and the R-amble is within a DL relay zone within the frame, and wherein the determining of whether or not the initial synchronization is acquired is indicated by an initial synchronization indicator.