Interference Minimization in 5G Heterogeneous Networks
Tao Han, Guoqiang Mao, Qiang Li, Lijun Wang, Jing Zhang

TL;DR
This paper introduces a novel user association scheme for 5G heterogeneous networks that minimizes interference by normalizing transmission powers and selecting base stations based on interference impact, improving network performance.
Contribution
The paper proposes a Transmission Power Normalization Model (TPNM) and a new user association scheme that reduces interference in multi-tier 5G networks, which is a novel approach.
Findings
Significant reduction in down-link interference compared to existing schemes
Maintains acceptable quality-of-service levels
Simplifies analysis through the TPNM model
Abstract
In this paper, we focus on one of the representative 5G network scenarios, namely multi-tier heterogeneous cellular networks. User association is investigated in order to reduce the down-link co-channel interference. Firstly, in order to analyze the multi-tier heterogeneous cellular networks where the base stations in different tiers usually adopt different transmission powers, we propose a Transmission Power Normalization Model (TPNM), which is able to convert a multi-tier cellular network into a single-tier network, such that all base stations have the same normalized transmission power. Then using TPNM, the signal and interference received at any point in the complex multi-tier environment can be analyzed by considering the same point in the equivalent single-tier cellular network model, thus significantly simplifying the analysis. On this basis, we propose a new user association…
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