Patent ID: 9025524
Filing Date: 2015-05-05
Classification: H04B,H04W

Abstract:
1. A method for synchronizing with a distributed antenna system (DAS) using two-steps synchronization, the method performed by a mobile station and comprising: receiving a primary preamble from a predetermined antenna of a plurality of distributed antennas of a base station of the DAS in a first period, wherein the primary preamble is transmitted using the predetermined antenna to avoid affecting reuse factor of the primary preamble; acquiring first synchronization for the predetermined antenna using the primary preamble, wherein the first synchronization is for acquiring large-scale synchronization with the DAS; receiving first secondary preambles from two or more antennas of the plurality of distributed antennas of the base station in a second period; selecting the antenna, which has transmitted a secondary preamble having the strongest signal intensity among the first secondary preambles, as a target antenna for acquisition of second synchronization; and acquiring the second synchronization for the target antenna using the first synchronization and the first secondary preambles transmitted from the target antenna, wherein the second synchronization is for acquiring synchronization with the DAS which is more accurate than the first synchronization.