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arXiv 1606.04749cs.ITmath.IT
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5G中的网络密度:从短距离通信的角度

Network Densification in 5G: From the Short-Range Communications Perspective

Junyu Liu, Min Sheng, Lei Liu, Jiandong Li

摘要:

除了先进的电信技术之外,无线网络最突出的演进是网络部署的密集化。特别地,增加的接入点/用户密度和减小的小区大小显著地增强了空间重用,从而提高了网络容量。然而,网络的超密度化和过度部署是否总能提高无线网络的性能?由于在密集网络中从发射机到接收机的距离大大缩短,信号更可能从远距离区域传播到短距离区域。如果不考虑短距离的传播特性,传统的理解网络致密化的影响变得令人怀疑。在这方面,必须重新考虑网络密集化带来的利弊。在本文中,我们首先讨论了密集部署的网络中的短距离传播特性,并通过实验结果验证了所提出的短距离传播模型的有效性。考虑到短距离传播,我们进一步探讨了网络致密化对网络容量的根本影响,并从网络容量的角度对超致密化进行了具体的解释。同时,由于短距离传播使干扰更加复杂和难以处理,我们讨论了可能的方法,以进一步提高超密集无线网络的网络容量。此外,还提出了关键挑战,以建议今后的方向。

英文摘要:

Besides advanced telecommunications techniques, the most prominent evolution of wireless networks is the densification of network deployment. In particular, the increasing access points/users density and reduced cell size significantly enhance spatial reuse, thereby improving network capacity. Nevertheless, does network ultra-densification and over-deployment always boost the performance of wireless networks? Since the distance from transmitters to receivers is greatly reduced in dense networks, signal is more likely to be propagated from long- to short-range region. Without considering short-range propagation features, conventional understanding of the impact of network densification becomes doubtful. With this regard, it is imperative to reconsider the pros and cons brought by network densification. In this article, we first discuss the short-range propagation features in densely deployed network and verify through experimental results the validity of the proposed short-range propagation model. Considering short-range propagation, we further explore the fundamental impact of network densification on network capacity, aided by which a concrete interpretation of ultra-densification is presented from the network capacity perspective. Meanwhile, as short-range propagation makes interference more complicated and difficult to handle, we discuss possible approaches to further enhance network capacity in ultra-dense wireless networks. Moreover, key challenges are presented to suggest future directions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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