Femtocells Coordination in Future Hybrid Accesss Deployments

Femtocells provide an attractive solution to locally improve the data rates and the coverage of future mobile networks including 5G. However, nearby non-subscribed users may experience severe interference. Hybrid access operation allows femtocells to serve non-subscribers by allowing them access to part of the spectrum. In this work, we propose a distributed process that allows the hybrid femtocell to defines the
spectrum access for the two types of users. The mechanism takes into account the prior condition of the users and tries to minimize the femtocell’s impact to the rest of the network. We also introduce a power control mechanism within clusters of femtocells. The mechanism relieves the femtocell operating in hybrid access mode and its subscribed users, by coordinating accordingly the nearby femtocells’ transmission.