Carrier aggregation wireless network system and base station, wireless communication device, and synchronization method thereof

摘要

A carrier aggregation wireless network system and a base station (BS), a wireless communication device, and a synchronization method thereof are disclosed. The wireless communication device receives a wireless signal from the BS. The wireless signal includes a primary cell (pcell) and a secondary cell (scell). A subframe of the scell includes a first OFDM symbol and a second OFDM symbol. The first OFDM symbol includes an extended primary synchronization signal (PSS). The second OFDM symbol includes a PSS. The scell includes a secondary synchronization signal (SSS). The wireless communication device acquires synchronization according to the extended PSS and/or the PSS. In addition, the wireless communication device may also acquire synchronization according to a cell ID, the PSS, and the SSS.