Analysis of Millimeter-Wave Multi-Hop Networks With Full-Duplex Buffered Relays
Analysis of Millimeter-Wave Multi-Hop Networks With Full-Duplex Buffered Relays
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DOI：
10.1109/tnet.2017.2786341
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
Guang Yang;Ming Xiao;H. Al-Zubaidy;Yongming Huang;J. Gross
中科院分区：
文献类型：
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作者：
Guang Yang;Ming Xiao;H. Al-Zubaidy;Yongming Huang;J. Gross
毫米波（mm波）频带中丰富的频谱使其成为未来无线通信系统的有吸引力的替代方案。期望这样的系统提供每秒多吉比特数量级的数据传输速率，以便满足对高速率数据通信的不断增长的需求。不幸的是，毫米波无线电受到严重的路径损耗，这限制了其用于长距离户外通信的可用性。在本文中，我们提出了一个多跳毫米波无线网络的室外通信，其中多个全双工缓冲中继用于扩展通信范围，同时提供端到端的性能保证，以穿越网络的流量。我们提供了一个累积的服务过程表征的毫米波传播信道自干扰的信道容量的矩母函数。然后，我们使用此特征来计算整体网络性能的概率上限，即，总积压和端到端延迟。此外，我们研究了自干扰对网络性能的影响，并提出了一种最优的功率分配方案，以减轻其影响，以提高网络性能。最后，我们研究了中继密度和网络性能之间的关系下的总功率约束。我们发现，增加中继密度可能会对网络性能产生不利影响，除非自干扰可以保持足够小。
The abundance of spectrum in the millimeter-wave (mm-wave) bands makes it an attractive alternative for future wireless communication systems. Such systems are expected to provide data transmission rates in the order of multi-gigabits per second in order to satisfy the ever-increasing demand for high rate data communication. Unfortunately, mm-wave radio is subject to severe path loss, which limits its usability for long-range outdoor communication. In this paper, we propose a multi-hop mm-wave wireless network for outdoor communication, where multiple full-duplex buffered relays are used to extend the communication range, while providing end-to-end performance guarantees to the traffic traversing the network. We provide a cumulative service process characterization for the mm-wave propagation channel with self-interference in terms of the moment generating function of its channel capacity. Then, we then use this characterization to compute probabilistic upper bounds on the overall network performance, i.e., total backlog and end-to-end delay. Furthermore, we study the effect of self-interference on the network performance and propose an optimal power allocation scheme to mitigate its impact in order to enhance network performance. Finally, we investigate the relation between relay density and network performance under a sum power constraint. We show that increasing relay density may have adverse effects on network performance, unless the self-interference can be kept sufficiently small.