Transmission method of time division duplexing system

The method comprises: predetermining a group of radio frame structures used by the system signal transmission; when said system coexists with the current LCR TDD system, a radio frame structure identical with the current LCR TDD system is used to make the transmission of downlink signals and uplink signals; when said system is in independent networking, according to the requirement of transmission time interval and the requirement of coverage distance of each cell, selecting one from one group of radio frame structures to transmit the downlink signals and uplink signals.