We discuss the measurement of the remaining neutrino oscillation
parameters (CP phase and mass ordering) in existing and future
experiments. While long-baseline neutrino oscillation experiments
will play a major role in the search for leptonic CP violation, the
mass ordering may be discovered in atmospheric neutrino oscillation
experiments by Earth matter effects, or medium baseline
reactor neutrino oscillation experiments by the scan of multiple oscillation
maxima. One very promising option, we are going to address, is an upgrade
of the IceCube-DeepCore array to lower energies, called PINGU (Precision
IceCube Next-Generation Upgrade). It could be used as an atmospheric
neutrino detector, or even serve as a target for a neutrino beam.