Patent ID: 9084188
Filing Date: 2015-07-14
Classification: H04L,H04W

Abstract:
1. A synchronization method of a carrier aggregation wireless network system, wherein the wireless network system comprises a first base station (BS), a second BS, and a wireless communication device, and a part of a coverage area of the first BS overlaps a part of a coverage area of the second BS, the synchronization method comprising: transmitting a first wireless signal by using the first BS, wherein the first wireless signal comprises a first subframe, the first subframe comprises a first orthogonal frequency-division multiplexing (OFDM) symbol, the first OFDM symbol comprises an extended primary synchronization signal (PSS), the extended PSS is sequentially a first periodic extension, a low-frequency part, a DC carrier, a high-frequency part, and a second periodic extension in order of increasing frequency on a spectrum, the DC carrier is a subcarrier located at a center of a baseband, the first periodic extension and the high-frequency part carry a same data, and the second periodic extension and the low-frequency part carry a same data; transmitting a second wireless signal by using the second BS, wherein the second wireless signal comprises a second subframe, the second subframe comprises a plurality of OFDM symbols, one of the OFDM symbols of the second subframe that is corresponding to the first OFDM symbol comprises a PSS, and the PSS is sequentially the low-frequency part, the DC carrier, and the high-frequency part in order of increasing frequency on the spectrum; and acquiring synchronization by the wireless communication device according to the extended PSS.