论文标题

由于非意外的用户设备和RIS,电磁场暴露避免了暴露

Electromagnetic Field Exposure Avoidance thanks to Non-Intended User Equipment and RIS

论文作者

Guo, Hao, Phan-Huy, Dinh-Thuy, Svensson, Tommy

论文摘要

一方面,由于使用大量多输入多输出(MIMO)和波束成形的新网络部署了新网络,对高通量的需求不断增长。另一方面,在某些国家或城市中,需要任意低电磁场暴露(EMFE),因为那些不持续的沟通所关心的人会减慢新网络的部署。最近,有人提议在设计未来的第六代(6G)时借此机会,除了更高的吞吐量外,还提供了一种新型的服务:任意低EMFE。最近的作品表明,与基站(BS)边缘共同优化的可重构智能表面(RIS)可以改善所需位置的接收到的吞吐量,同时降低各地的EMFE。在本文中,我们介绍了非意外用户(NIU)的新概念。 NIU是网络的用户,他/她不下载/上传数据时请求低EMFE。 NIU让他/她的设备称为NIU设备(NIUE),与网络交换了一些控制信号和飞行员,以帮助网络避免将NIU暴露于向另一个网络用户传输数据的波浪:预期用户(IU),其设备称为IU设备(IU设备(IUE))。具体而言,我们提出了几种新方案,以最大化NIU的EMFE约束下的IU吞吐量(实际上,在NIUE上是干扰约束)。研究了几种传播方案。分析和数值结果表明,适当的功率分配和光束优化可以显着提高EMFE受限系统的性能,并具有有限的复杂性和通道信息。

On the one hand, there is a growing demand for high throughput which can be satisfied thanks to the deployment of new networks using massive multiple-input multiple-output (MIMO) and beamforming. On the other hand, in some countries or cities, there is a demand for arbitrarily low electromagnetic field exposure (EMFE) of people not concerned by the ongoing communication, which slows down the deployment of new networks. Recently, it has been proposed to take the opportunity, when designing the future 6th generation (6G), to offer, in addition to higher throughput, a new type of service: arbitrarily low EMFE. Recent works have shown that a reconfigurable intelligent surface (RIS), jointly optimized with the base station (BS) beamforming can improve the received throughput at the desired location whilst reducing EMFE everywhere. In this paper, we introduce a new concept of a non-intended user (NIU). An NIU is a user of the network who requests low EMFE when he/she is not downloading/uploading data. An NIU lets his/her device, called NIU equipment (NIUE), exchange some control signaling and pilots with the network, to help the network avoid exposing NIU to waves that are transporting data for another user of the network: the intended user (IU), whose device is called IU equipment (IUE). Specifically, we propose several new schemes to maximize the IU throughput under an EMFE constraint at the NIU (in practice, an interference constraint at the NIUE). Several propagation scenarios are investigated. Analytical and numerical results show that proper power allocation and beam optimization can remarkably boost the EMFE-constrained system's performance with limited complexity and channel information.

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