  Simultaneous information and energy transfer is attracting much attention as
an effective method to provide green energy supply for mobiles. However the
very low power level of the harvested energy from RF spectrum limits the
application of such technique. Thanks to the improvement of sensitivity and
efficiency of RF energy harvesting circuit as well as the dense deployment of
small cells base stations, the SIET becomes more practical. In this paper, we
propose a unified receiver model for SIET in LTE-A small cell base staion
networks, formulate the feasibility problem with Poisson point process model
and analysis the feasibility for a special and practical senario. The results
shows that it is feasible for mobiles to charge the secondary battery wih
harvested energy from BSs, but it is still infeasible to directly charge the
primary battery or operate without any battery at all.
