Robust Transmission and Interference Management for Femtocells With Unreliable Network Access
A cellular system where macrocells are overlaid with femtocells is studied. Each femtocell is served by a Home Base Station (HBS) that is connected to the macrocell Base Station (BS) via an unreliable network access link, such as DSL followed by the Internet. A scenario with a single macrocell and a single femtocell is considered first, and is then extended to include multiple macrocells and femtocells, both with standard single-cell processing and with multicell processing (or network MIMO). Two main issues are addressed for the uplink channel: interference management between femto and macrocells; robustness to uncertainties on the quality of the femtocell (HBSto-BS) access link.