Interference Cancelation Schemes for Uplink Transmission in Femtocells
The authors present techniques that solve the near-far problems in femtocell networks. When a co-channel configuration is used, a transmission in the macrocell may cause interference to a femtocell. They introduce methods to cancel the interference caused by the macrocell to a femtocell by using the high-rate link between the macrocell Base Station (BS) and the femtocell BS. In such a way, the interference from macrocell transmitters is completely cancelled when uplink transmission is used in the femtocell. Therefore, the allocation of time slots for uplink/downlink in a femtocell can be done by trying only to minimize the interference that a femtocell terminal experiences during a downlink transmission.