Oscillating Universe in Horava-Lifshitz Gravity

We study the dynamics of isotropic and homogeneous universes in the generalized Ho\v{r}ava-Lifshitz gravity, and classify all possible evolutions of vacuum spacetime. In the case without the detailed balance condition, we find a variety of phase structures of vacuum spacetimes depending on the coupling constants as well as the spatial curvature $K$ and a cosmological constant $\mathrm{\Lambda }$. A bounce universe solution is obtained for $\Lambda> 0, K=\pm 1$or$\Lambda= 0, K=- 1$,whileanoscillationspacetimeisfoundfor$\Lambda\geq 0, K=1$,or$\Lambda< 0, K=\pm 1$. We also propose a quantum tunneling scenario from an oscillating spacetime to an inflationary universe, resulting in a macroscopic cyclic universe.