Femtocells have a number of advantages for both mobile service providers and users, these last may receive better signal level, since the distance between the femto-cell and the EU is reduced, it causes the SINR is higher increasing capacity and encouraging higher levels of QoS. In turn, the spectral efficiency is increased due to the number of users per hertz per unit area, in addition, the low levels of transmission power generates a lower power consumption because the mobile does not require too much power for transmission. Furthermore, when implemented in residential scenarios, the number of users is small and may share resources [4].
Figure # 2 shows two scenarios: in a), a traditional macrocell where eNodeB provides coverage to a particular area, if the case of two UEs that are at the same distance from the eNodeB, is analyzed, in which the difference between both is that one of them is outdoors (UE1) and the other in a house room (EU4), the EU4 will have more losses due to penetration in house. On the other hand, in b) the implementation of two femto-cells is proposed, one in each house, to increase the quality of the signal within the property, and therefore the throughput and quality of service provided.
Figure # 2. a) Traditional macro-cell; b) Interaction of macro-cell with femto-cells [2].
References
- G. de la Roche, A. Valcarce, D. Lopez-Perez, Jie Zhang. Access control Mechanisms for Femtocells. Communications Magazine, IEEE, vol. 48, no. 1, pp. 33-39, 2010.
- D. Calin, H. Claussen, H. Uzunalioglu. On Femto Deployment Architectures and Macrocell Offloading Benefits in Joint Macro-Femto Deployments. Communications Magazine, IEEE, vol. 48, no. 1, pp. 26-32, 2010.
- http://www.femtoforum.org
- Vikram Chandrasekhar, Jeffrey G. Andrews, Alan Gatherer. Femtocell Networks: A Survey. Communications Magazine, IEEE, vol. 46, no. 9, pp. 59-67, 2008.
