Uplink Interference Co-ordination/Avoidance in LTE Systems

Abstract

In this paper, we propose and evaluate a new interference co-ordination scheme for the uplink of LTE systems. This presented approach mitigates the effects of ICI (Inter-Cell Interference) by finding suboptimal frequency and power assignments to all users in a given cellular network. The spectral efficiency of cell-edge users is enhanced in this scheme and simulation results show that our presented approach outperforms Samsung's Flexible Fractional Frequency Reuse (FFFR) algorithm which is one of the interference coordination schemes proposed for LTE systems.

Practical framework for ultra‐fair dynamic interference coordination in mobile communication systems

“…Chiang et al [16] proposed a graph-based scheme, modelling interference as weights of edges, so UEs with high in-between weights should not use the same RB. Jalloul et al [17] proposed two joint resource and power allocation schemes. One allocated power for all the UEs before RBs, while the other allocated power and RBs simultaneously.…”

Scalable Device-to-Device Communications For Frequency Reuse >> 1

“…If CSI is not available we can model the channel gain between two devices v and i as a random variable G vi , defined in (7), where d vi and h vi are independent random variables. Thus we can calculate the expected value of G vi as:…”

“…In [6] the authors propose an interference aware joint scheduling method based on proportional fairness. The work [7] studies the problem of resource allocation considering the impact of inter-cell interference while maintaining a frequency reuse of one. The works [8] and [9] perform an evaluation the LTE open loop fractional power control (OFPC) and the closed loop power control respectively considering the impact of intercell interference while giving an insight to the proper configuration of the design parameters.…”