Patent ID: 9591597
Date: 2017-03-07
CPC Classifications: H04J,H04W

Claim:
1. A method for performing synchronization with a neighbor base station (BS) of a user equipment (UE) in a wireless access system, the method comprising: when the UE based on a macro BS is located at a boundary of the neighbor BS, receiving, by the UE, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) of the neighbor BS interfered by a PSS and a SSS of the macro BS through subframe #0 and subframe #5; receiving, by the UE, an additional synchronization signal (SS) of the neighbor BS in a subframe corresponding to an almost blank subframe (ABS) of the macro BS when information indicating a presence of the additional SS is received; performing, by the UE, synchronization with the neighbor BS using the PSS and the SSS of the neighbor BS interfered by the PSS and the SSS of the macro BS and the additional SS of the neighbor BS, wherein the subframe corresponding to the ABS of the macro BS is other than the subframe #0 and the subframe #5, wherein the additional SS is received in a fixed position in the subframe corresponding to the ABS of the macro BS, wherein the fixed position is one of symbols #2, #3, #5, #6, #9, #10, #12 and #13 among symbols #0 to #13 in the subframe corresponding to the ABS of the macro BS, and wherein the additional SS of the neighbor BS is different from the PSS or the SSS of the neighbor BS.