波束对齐:具有多连接的毫米波网络的分布式用户关联

IF 4.6 2区 计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE
L. Weedage, C. Stegehuis, S. Bayhan
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引用次数: 0

摘要

由于6ghz以下频段的频谱不足以满足5G用例的高带宽需求,5G网络将其运营扩展到毫米波频段。然而,在这些波段的操作必须处理高穿透损失和对阻塞物体的敏感性。波束形成和多连接(MC)可以一起缓解这些挑战。但是,利用这两个特征来设计这样一个最优的用户关联方案是非常重要的,而且计算成本很高。以前的研究要么考虑所有用户的固定MC度,要么忽略波束形成。在毫米波网络中每个用户的最优MC度是什么这个问题的驱动下,我们制定了一个考虑波束形成和MC的最大吞吐量的用户关联方案。我们的数值分析表明,最优MC度不存在一刀切;它取决于用户的数量,他们的速率要求,位置和在一个BS的最大有效波束数。基于最优关联,我们设计了波束对齐:一种多项式时间复杂度为O(|U|log|U|)的高效启发式算法,其中|U|为用户数量。此外,波束对准只使用本地BS信息,即用户处接收到的信号质量。与先前的工作不同,波束对准考虑了波束形成、多连通性和视距概率。通过模拟,我们表明波束对准在每个用户容量和满意度方面表现接近最佳,同时它优于常用的基于信号干扰和噪声比的关联方案。然后,我们证明了波束对齐在各种具有挑战性的场景下具有稳健的性能:存在阻塞,雨水和集群用户。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
beam-align: Distributed user association for mmWave networks with multi-connectivity
Since the spectrum below 6 GHz bands is insufficient to meet the high bandwidth requirements of 5G use cases, 5G networks expand their operation to mmWave bands. However, operation at these bands has to cope with a high penetration loss and susceptibility to blocking objects. Beamforming and multi-connectivity (MC) can together mitigate these challenges. But, to design such an optimal user association scheme leveraging these two features is non-trivial and computationally expensive. Previous studies either considered a fixed MC degree for all users or overlooked beamforming. Driven by the question what is the optimal degree of MC for each user in a mmWave network, we formulate a user association scheme that maximizes throughput considering beam formation and MC. Our numerical analysis shows that there is no one-size-fits-all degree of optimal MC; it depends on the number of users, their rate requirements, locations, and the maximum number of active beams at a BS. Based on the optimal association, we design beam-align: an efficient heuristic with polynomial-time complexity O(|U|log|U|), where |U| is the number of users. Moreover, beam-align only uses local BS information - i.e. the received signal quality at the user. Differing from prior works, beam-align considers beamforming, multiconnectivity and line-of-sight probability. Via simulations, we show that beam-align performs close to optimal in terms of per-user capacity and satisfaction while it outperforms frequently-used signal-to-interference-and-noise-ratio based association schemes. We then show that beam-align has a robust performance under various challenging scenarios: the presence of blockers, rain, and clustered users.
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来源期刊
Computer Networks
Computer Networks 工程技术-电信学
CiteScore
10.80
自引率
3.60%
发文量
434
审稿时长
8.6 months
期刊介绍: Computer Networks is an international, archival journal providing a publication vehicle for complete coverage of all topics of interest to those involved in the computer communications networking area. The audience includes researchers, managers and operators of networks as well as designers and implementors. The Editorial Board will consider any material for publication that is of interest to those groups.
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