Performance Analysis for New Call Bounding Scheme with SFR in LTE-Advanced Networks

The call admission control (CAC) optimizes the use of allocated channels against offered traffic maintaining the required quality of service (QoS). Provisioning QoS to user at cell-edge is a challenge where there is limitation in cell resources due to inter-cell interference (ICI). New Call bounding scheme is a Call Admission control that depends on restricting the number of new calls accepted into the cell by a threshold. In this paper, traffic analysis in cell-edge is developed based on NCB policy using three dimension Markov model. The model is based on actual resources allocated to cell-edge users according to Soft Frequency Reuse (SFR) scheme in LTE-Advanced system. In the proposed model, the performance metrics in terms of blocking and dropping probability for cell-edge and cell-core users is deduced separately, in addition, the optimal parameter settings for system performance metrics is developed.