A significant technical challenge in deploying femtocells is controlling theinterference from the underlay of femtos onto the overlay of macros. This paperpresents a novel interference control method where the macrocell bandwidth ispartitioned into subbands, and the short-range femtocell links adaptivelyallocate their power across the subbands based on a load-spillage power controlmethod. The scheme can improve rate distribution in the macro network whilealso providing opportunities for short-range communication as well. Moreover,the proposed scheme requires minimal interference coordination communicationbetween the femtos and macros, which is one of the main challenges in femtocellsystems. Also, simulations show certain advantages over simplerorthogonalization schemes or power control schemes without subbandpartitioning. Further modest gains may also be possible with interferencecancelation.
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