What is claimed is:1. A wireless communication method, comprising:transmitting, by a base station, a synchronization signal and a signal in a broadcast channel within a downlink access time interval comprising one or more sweeping time blocks, wherein the signal in the broadcast channel comprises configuration information of system information for transmitting the system information, wherein the signal in the broadcast channel is associated with a demodulation reference signal for demodulating the signal in the broadcast channel, wherein the synchronization signal and the demodulation reference signal are transmitted using a same port, and wherein the signal in the broadcast channel further comprises a first type message signal that indicates a relative frequency-domain position of the one or more sweeping time blocks in the downlink access time interval;performing a subsequent transmission based on the synchronization signal and the signal in the broadcast channel.2. The wireless communication method of claim 1, wherein the one or more sweeping time blocks comprise a synchronization signal.3. The wireless communication method of claim 1, wherein the downlink access time interval comprises one or more consecutive blocks.4. The wireless communication method of claim 1, wherein the downlink access time interval comprises one or more discrete blocks.5. A wireless communication method, comprising:receiving, by a terminal from a base station, a synchronization signal and a signal in a broadcast channel within a downlink access time interval comprising one or more sweeping time blocks, wherein the signal in the broadcast channel comprises configuration information of system information, wherein the signal in the broadcast channel is associated with a demodulation reference signal for demodulating the signal in the broadcast channel, wherein the synchronization signal and the demodulation reference signal are transmitted using a same port, and wherein the signal in the broadcast channel further comprises a first type message signal that comprises a relative frequency-domain position of the one or more sweeping time blocks in the downlink access time interval;performing, by the terminal, a subsequence transmission with the base station based on the synchronization signal and the signal in the broadcast channel.6. The wireless communication method of claim 5, wherein the one or more sweeping time blocks comprise a synchronization signal.7. The wireless communication method of claim 5, wherein the downlink access time interval comprises one or more consecutive blocks.8. The wireless communication method of claim 5, wherein the downlink access time interval comprises one or more discrete blocks.9. A wireless communication device, applied to a base station, comprising:a processor; anda memory comprising a processor-executable code, wherein, the processor when executing the processor-executable code is configured to:transmit a synchronization signal and a signal in a broadcast channel within a downlink access time interval comprising one or more sweeping time blocks, wherein the signal in the broadcast channel comprises configuration information of system information for transmitting the system information, wherein the signal in the broadcast channel is associated with a demodulation reference signal for demodulating the signal in the broadcast channel, wherein the synchronization signal and the demodulation reference signal are transmitted using a same port, and wherein the signal in the broadcast channel further comprises a first type message signal that indicates a relative frequency-domain position of the one or more sweeping time blocks in the downlink access time interval;perform a subsequent transmission based on the synchronization signal and the signal in the broadcast channel.10. The wireless communication device of claim 9, wherein the one or more sweeping time blocks comprise a synchronization signal.11. The wireless communication device of claim 9, wherein the downlink access time interval comprises one or more consecutive blocks.12. The wireless communication device of claim 9, wherein the downlink access time interval comprises one or more discrete blocks.13. A wireless communication device, applied to a terminal, comprising:a processor; anda memory comprising a processor-executable code, wherein, the processor when executing the processor-executable code is configured to:receive, from a base station, a synchronization signal and a signal in a broadcast channel within a downlink access time interval comprising one or more sweeping time blocks, wherein the signal in the broadcast channel comprises configuration information of system information, wherein the signal in the broadcast channel is associated with a demodulation reference signal for demodulating the signal in the broadcast channel, wherein the synchronization signal and the demodulation reference signal are transmitted using a same port, and wherein the signal in the broadcast channel further comprises a first type message signal that comprises a relative frequency-domain position of the one or more sweeping time blocks in the downlink access time interval; andperform a subsequence transmission with the base station based on the synchronization signal and the signal in the broadcast channel.14. The wireless communication device of claim 13, wherein the one or more sweeping time blocks comprise a synchronization signal.15. The wireless communication device of claim 13, wherein the downlink access time interval comprises one or more consecutive blocks.16. The wireless communication device of claim 13, wherein the downlink access time interval comprises one or more discrete blocks.