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arXiv 1803.01136cs.NI
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毫米波车载网络覆盖与连通性分析

Coverage and Connectivity Analysis of Millimeter Wave Vehicular Networks

Marco Giordani, Mattia Rebato, Andrea Zanella, Michele Zorzi

摘要:

下一代汽车将需要每行驶小时TB级的数据传输速率,以支持先进的汽车服务。这种前所未有的数据交换量超出了现有车载通信技术的能力,需要新的解决方案。对于这种对超高传输速度的日益增长的需求的可能答案可以在毫米波(mmWave)频带中找到,然而,毫米波频带受到高信号衰减和具有挑战性的传播特性的影响。特别地,毫米波链路通常是定向的,以受益于所得到的波束成形增益,并且需要发射器和接收器波束的精确对准,该操作可能增加通信的延迟并且由于波束未对准而导致耳聋。在本文中,我们提出了一个随机模型,用于表征毫米波汽车网络中的波束覆盖和连接概率。其目的是解释在设计基于毫米波链路的车辆场景解决方案时必须考虑的一些复杂和有趣的权衡。结果表明,在高度移动毫米波系统中的汽车节点的性能严格取决于车辆部署的特定环境,并且必须考虑几个汽车特定的特征,如节点速度,波束对准周期,基站密度和天线几何形状。

英文摘要:

The next generations of vehicles will require data transmission rates in the order of terabytes per driving hour, to support advanced automotive services. This unprecedented amount of data to be exchanged goes beyond the capabilities of existing communication technologies for vehicular communication and calls for new solutions. A possible answer to this growing demand for ultra-high transmission speeds can be found in the millimeter-wave (mmWave) bands which, however, are subject to high signal attenuation and challenging propagation characteristics. In particular, mmWave links are typically directional, to benefit from the resulting beamforming gain, and require precise alignment of the transmitter and the receiver beams, an operation which may increase the latency of the communication and lead to deafness due to beam misalignment. In this paper, we propose a stochastic model for characterizing the beam coverage and connectivity probability in mmWave automotive networks. The purpose is to exemplify some of the complex and interesting tradeoffs that have to be considered when designing solutions for vehicular scenarios based on mmWave links. The results show that the performance of the automotive nodes in highly mobile mmWave systems strictly depends on the specific environment in which the vehicles are deployed, and must account for several automotive-specific features such as the nodes speed, the beam alignment periodicity, the base stations density and the antenna geometry.

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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