煤矿井下智能超表面非视距无线覆盖技术综述  

Survey of the non-line-of-sight wireless coverage technology by reconfigurable intelligent surfaces in underground coal mines

作　　者：李世银 杨瑞鑫[1] 杨磊 沈胜强 李飞飞 胡青松[1,2] LI Shiyin;YANG Ruixin;YANG Lei;SHEN Shengqiang;LI Feifei;HU Qingsong(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Engineering Research Center of Intelligent Control for Underground Space,Ministry of Education,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学信息与控制工程学院,江苏徐州221116 [2]中国矿业大学地下空间智能控制教育部工程中心,江苏徐州221116

出　　处：《中国矿业大学学报》2024年第3期613-622,共10页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(62371451)。

摘　　要：煤矿井下环境存在大量的弯道、岔道、硐室和大型设备遮挡等非视距(Non-Line of Sight, NLOS)场景,导致煤矿井下无线通信覆盖范围受限且盲点和盲区多.在综采工作面等关键场景,无线通信覆盖能力与传输需求的矛盾更为突出.近年来出现的智能超表面(Reconfigurable Intelligence Surface, RIS)技术为解决煤矿井下NLOS场景无线覆盖难题提供了新途径和新思路.本文在介绍了RIS系统结构与特点基础上,讨论了RIS在煤矿井下巷道、硐室和综采工作面等典型NLOS场景的应用优势,以及需要进一步研究解决的信道测量与建模、近场效应、波束成形和部署规划等关键技术问题与基本思路,为解决煤矿智能化开采所需要的可靠通信技术难题指明了新方向.In underground coal mines, there are a large number of non-line of sight(NLOS) scenarios, such as curves, forks, caverns, and large equipment obstructions, which result in limited wireless coverage and many blind spots. In critical areas such as the comprehensive working face, the conflict between the wireless coverage capability and transmission requirement is even more apparent. Recently, a novel route to solve this troublesome problem has been provided through an emerging technology-the reconfigurable intelligence surface(RIS). In this paper, RIS's structure and characteristics were introduced, and the RIS's applications advantages were discussed in typical NLOS scenarios in underground coal mines, including the roadways, caverns, and comprehensive work faces. Meanwhile, some key technical issues and basic research ideas were presented, including channel measurement and modeling, near-field effects, beamforming, and deployment programming, which require further investigation and resolution. A new direction was indicated to address the challenges of reliable transmission for intelligent coal mining.

关 键 词：智能超表面(RIS) 非视距(NLOS)覆盖 被动中继 煤矿井下 

分 类 号：TD655[矿业工程—矿山机电]