A method and an apparatus for wakeup, and a terminal. The method includes: A first module of the terminal obtains a wakeup signal; and in a case that a first target occasion is an occasion outside a paging time window (PTW) of a first discontinuous reception (DRX) cycle, a second module of the terminal is triggered to switch to an idle state. The first target occasion is determined based on an occasion on which the first module obtains the wakeup signal, and the first DRX cycle includes the PTW.