Interference aware two-tier fair user-cell association

Abstract

The deployment of heterogeneous networks (HetNets) incorporating small cells within macrocells has emerged as a predominant strategy to improve the performance of cellular communication systems. This study delves into the intricacies of user-cell association within HetNets and introduces an optimized approach that not only maximizes the sum of downlink signal-to-noise ratio (SNR) but also limits uplink interference within a dual-tier network. The suggested solution is scalable and adaptable to ultra-dense HetNets (UD-HetNets). It also facilitates various communication systems, encompassing ultra-reliable low-latency communications by leveraging a weighted cost function. Assorted simulations illustrate that optimization tools achieve the optimal solution of the proposed association problem. Comparative studies with traditional association methods signify the performance of the proposed algorithm, manifested in increased SNR values and an increased number of active users. It is shown that a trade-off surfaces between increased SNR values and increased fairness. In summary, the research emphasizes a comprehensive methodology for user-cell association, effectively addressing performance enhancement and fairness in diverse communication scenarios.