Interference and Coverage Analysis of mmWave Inter-Vehicle Broadcast with Directional Antennas
Interference and Coverage Analysis of mmWave Inter-Vehicle Broadcast with Directional Antennas
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DOI：
10.1109/icc45855.2022.9838709
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
Tianyi Zhang;Hongwei Zhang;Zhibo Meng
中科院分区：
文献类型：
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作者：
Tianyi Zhang;Hongwei Zhang;Zhibo Meng
由于毫米波 (mmWave) 频段提供大带宽和高增益定向天线，毫米波通信已被认为是满足车载网络高数据速率需求的主要解决方案之一。毫米波车对车 (V2V) 通信中的单播已得到充分研究，但对主动安全等许多 V2V 应用所需的 V2V 广播的关注却少之又少。为了填补这一空白，本文系统地研究了毫米波V2V广播，考虑了V2V环境中毫米波信号传播的独特属性以及定向天线和干扰的影响，旨在提供对毫米波V2V广播的独特见解，并为设计有效的V2V广播协议提供启示。基于广泛接受的高保真系统模型，我们对接收端信号干扰加噪声比 (SINR) 和广播覆盖范围进行数学分析，并研究遮挡、车辆间距、车辆密度和波束方向图的影响。通过综合数值分析，我们发现，并不是存在单一的唯一最佳波束宽度，而是存在一个最佳波束宽度范围，在该范围内波束宽度具有相似的性能并且可以最大化覆盖范围。我们还发现，载波侦听范围的选择起着重要作用，因为它高度影响整个车辆网络的性能。
Thanks to the availability of large bandwidth and high-gain directional antennas at the millimeter-wave (mmWave) bands, mmWave communications have been considered as one of the primary solutions to meet the high data rates needs in vehicular networks. Unicast in mmWave vehicle-to-vehicle (V2V) communications has been well-studied, but much less attention has been paid to V2V broadcast which is required by many V2V applications such as active safety. To fill the gap, this paper systematically investigates mmWave V2V broadcast by considering the unique properties of mmWave signal propagation in V2V environments as well as the impacts of directional antennas and interference, aiming to provide unique insight into mmWave V2V broadcast and to shed light on designing effective V2V broadcast protocols. Based on widely-accepted, high-fidelity system models, we mathematically analyze the receiver-side signal-to-interference-plus-noise-ratio (SINR) and broadcast coverage, and we study the impacts of blockage, inter-vehicle distance, vehicle density and beam pattern. Through comprehensive numerical analysis, we find out that, instead of a single unique optimal beamwidth, there exists an optimal range of beamwidth, in which the beamwidths have similar performance and can maximize the coverage. We also find out that the selection of carrier sensing range plays an important role as it highly influences the performance of the whole vehicular networks.