Embodiments of the present invention disclose a signal transmission method, user equipment, and a base station. The method includes: determining a feature parameter of UE; and according to the feature parameter of the UE and a preset correspondence, determining a coverage enhancement technology used to transmit a first signal, and/or determining a second signal that the UE supports transmitting, and/or determining a function, supported by the UE, of a third signal. The present invention can optimize resource utilization of a system, decrease processing complexity, and reduce power consumption.