NOVEL CELL SELECTION PROCEDURE FOR LTE HETNETS BASED ON MATHEMATICAL MODELLING OF PROPORTIONAL FAIR SCHEDULING

Femtocells have been considered one of the most important technologies in LTE networks to solve indoor coverage problem, however, the randomness deployment of femtocells, leads to great challenge for selecting optimum serving cell. In this article, a new cell selection algorithm is proposed that enables new user to select best serving cell, whereas, several factors are put into consideration other than highest instantaneous SNR or maximum RSRP such as cell load. A new prediction algorithm is designed to predict the performance of scheduling algorithm to calculate expected number of RBs to be scheduled to new user, then reduction in achievable data rate due to both received SNR and instant cell load is estimated. The numerical results show that, the new proposed cell selection algorithm achieves higher average cell throughput than conventional cell selection methods and achieves less cell load variance between different adjacent cells.