  We describe quantization schemes for scalar field cosmology in the metric
variables with fundamental discreteness imposed with a lattice. The variables
chosen for quantization determine the lattice, and each lattice produces
distinct effective equations derived from semiclassical states. We show that
requiring a bounce at the Planck density uniquely selects the volume lattice
and gives the same effective Friedmann equation as that obtained in loop
quantum cosmology. We also present conditions for the validity of the effective
equations.
