Among the all known crystalline ice phases, ice (Ih phase) exhibits anomalous thermal expansion behavior. We propose to measure phonon density of state of protonated ice (H2O) and deuterated ice (D2O) in Ih phase at 240 K at different pressures up to 1.8 kbar. The measurements will enable to determination of the energy dependence of the Grüneisen parameters strictly in Ih phase thereby quantitative calculation of the thermal expansion coefficient from phonon data to be undertaken. Apart from the pressure studies, we would also like to measure the temperature dependence of phonon frequencies in the Ih phase of both the protonated (H2O) and deuterated ice (D2O). The combination of temperature and pressure measurements would help to determine the implicit as well as explicit anharmonicities. We also plan to do ab-initio calculations for analysis of the experimental data.