Capable of enhancing spatial multiplexing and greatly expanding network capacity, network densification has undoubtedly become a general trend in future wireless networks. However, in addition to the expected advantages, the overuse of spatial resources would result in unpredictable and overwhelming interference as well due to the limited spectrum resources and highly disorganized network infrastructures. Hence, a critical issue arises: are conventional IM techniques still applicable and effective to tackle the interference in UDN? To shed light on the problem, in this article we first investigate the characteristics of interference in UDN and then provide an overview of the existing dominant IM techniques. It is found that, due to the complicated interference, most IM techniques designed for sparse networks would lose their merits when applied in UDN. To reap their potential benefits, we design an IM entity for UDN, aided by which an adaptive on-off power control method is proposed. Results reveal that network capacity could be significantly improved using the proposed method, especially in UDN. In addition, open issues and challenges for IM co-design with stateof- the-art communications technologies are highlighted to provide insight on the potential direction in future wireless networks.

中文翻译：

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超密集网络中的干扰管理：挑战和方法


网络致密化能够增强空间复用，极大扩展网络容量，无疑已成为未来无线网络的大趋势。然而，除了预期的优势之外，由于有限的频谱资源和高度混乱的网络基础设施，过度使用空间资源也会导致不可预测的、压倒性的干扰。因此，一个关键问题出现了：传统的 IM 技术是否仍然适用并有效地解决 UDN 中的干扰？为了阐明这个问题，在本文中，我们首先研究 UDN 中的干扰特征，然后概述现有的主流 IM 技术。研究发现，由于复杂的干扰，大多数为稀疏网络设计的IM技术在UDN中应用时会失去其优点。为了获得它们的潜在好处，我们为 UDN 设计了一个 IM 实体，并在此基础上提出了一种自适应开关功率控制方法。结果表明，使用所提出的方法可以显着提高网络容量，特别是在 UDN 中。此外，还强调了 IM 与最先进的通信技术协同设计的未决问题和挑战，以提供对未来无线网络潜在方向的见解。