01541nas a2200157   4500008004100000245006300041210006300104260001900167300001200186520098500198100002101183700002001204700002401224700002201248856011301270       2015                        eng d00aOptimizing hybrid access femtocell clusters in 5G networks0 aOptimizing hybrid access femtocell clusters in 5G networks  cNovember 4 - 6  a220-2263 a<p class="rtejustify">Femtocells are an efficient way of reducing infrastructure costs while providing better data rates and coverage. High penetration is expected in the upcoming ultra dense 5G networks, increasing the probability of femtocells’ clusters. Strong resulting interference for nearby non-subscribed users will require interference mitigation techniques. In this paper we present a mechanism where multiple femtocells coordinate their transmission to serve multiple non-subscribed users through hybrid access. First, the spectrum allocation of non-subscribed users by femtocells is determined. Then, we introduce a power control algorithm that is based on two factors. The need for compensation for the subscribed users, due to reduced spectrum, and the effect that any change in power transmission will have on neighbouring femtocells. We evaluate the effectiveness of the algorithm through simulations on individual throughput and overall achieved capacity.</p>
1 aBouras, Christos1 aDiles, Georgios1 aKokkinos, Vasileios1 aPapazois, Andreas  uhttp://telematics.upatras.gr/telematics/publications/optimizing-hybrid-access-femtocell-clusters-5g-networks