A model for analysing impact of frequency reuse on inter-cell interference in LTE network

Recently 4G cellular wireless broadband networks have witnessed rapid development. LTE network deployment is inseparably linked with maintaining the quality of service (QoS) and enhancing customer base. Meeting the corresponding radio resource related requirements is the primarily aim of radio resource management (RRM). Managing radio resources encompasses radio admission control, dynamic resource allocation, inter-cell interference coordination (ICIC), etc. The last mentioned RRM technique is often implemented through frequency reuse partitioning, which leads to frequency overlapping over several LTE cells. It does not exclude the possibility that the same frequency is assigned to two or more users located in adjacent cells (then the so-called collision occurs). In this paper, we propose a model of wireless network with frequency reuse, and we assume that the network supports guaranteed bit rate (GBR) services, e.g. telephony. Queuing analysis of the model is performed, which resulted in analytical formulae for computing mean number of collisions, mean number of users, and blocking probabilities.