Internet-of-vehicle (IoV) is a general concept referring to, e.g., autonomous drive based vehicle-to-everything (V2X) communications or moving relays. Here, high rate and reliability demands call for advanced multi-antenna techniques and millimeter-wave (mmw) based communications. However, the sensitivity of the mmw signals to blockage may limit the system performance, especially in highways/rural areas with limited building reflectors/base station deployments and high-speed devices. To avoid the blockage, various techniques have been proposed among which reconfigurable intelligent surface (RIS) is a candidate. RIS, however, has been mainly of interest in stationary/low mobility scenarios, due to the associated channel state information acquisition and beam management overhead as well as imperfect reflection. In this article, we study the potentials and challenges of RIS-assisted dynamic blockage avoidance in IoV networks. Particularly, by designing region-based RIS pre-selection as well as blockage prediction schemes, we show that RIS-assisted communication has the potential to boost the performance of IoV networks. However, there are still issues to be solved before RIS can be practically deployed in IoV networks.
翻译:机动车辆互联网(IoV)是一个一般概念,指自动驱动器驱动器到全能(V2X)通信或移动式继电器。这里,高速率和可靠要求要求要求先进的多ANET技术和毫米波通信。然而,毫米信号对阻塞性能的敏感度可能会限制系统性能,特别是在建筑反射器/基地站部署和高速装置有限的高速公路/农村地区。为了避免阻塞,已经提出了各种技术,其中可重新配置智能表面(RIS)为候选技术。然而,由于相关的频道国家信息获取和波束管理管理间接费用以及不完善的反思,RIS对固定/低移动性设想主要是有兴趣的。在本篇文章中,我们研究了在IoV网络中由RIS协助避免动态阻塞的可能性和挑战。特别是,通过设计以区域为基础的RIS预选和阻塞性预测计划,我们表明RIS协助的通信有可能在IoV网络部署之前促进IOS网络的性能。但是,在实际部署之前,仍有问题需要解决。