摘要
智能反射面(RIS)为无线网络注入新型绿色资源,但也带来了新的组网开销,成为制约其实际应用的关键。在考虑开销的基础上,RIS是否依然能够发挥其赋能无线通信的潜在价值、如何降低RIS开销,以及如何减小RIS开销的影响,是亟待探索的问题。对低开销RIS辅助无线通信进行了系统综述,梳理了RIS开销模型,包括RIS通信开销模型和RIS电路开销模型,分析了开销问题对RIS协助无线网络性能的负面影响,并整理了5种常见的低开销方案。结合6G网络发展趋势,对未来亟待解决的RIS开销问题及相关研究方向进行了总结。本研究有助于激发RIS的无线赋能潜力,从而推进RIS技术在更多场景中的应用。
Reconfigurable Intelligent Surfaces(RISs)are new green resources for wireless networks,but still bring in extra networking over⁃head,which may seriously limit their performance in practical networks.Based on these considerations,it is important to study whether and how RIS can still enhance wireless communication performance,and how to mitigate the impact of RIS overhead.A systematic review of low-overhead RIS-assisted wireless communication is presented.Two models of the RIS overheads are introduced,including communica⁃tion overhead and circuit power consumption of the RIS.The corresponding impact on the communication performance is analyzed,then five low-overhead solutions are introduced.Finally,in line with the development trends of 6G networks,the unresolved issues are summa⁃rized and the corresponding research directions that need urgent attention in the future are envisioned.Our work will contribute to inspiring the potential of RIS-assisted wireless communication and promote RIS’s application in more scenarios.
作者
陈天贝
李娜
陶小峰
CHEN Tianbei;LI Na;TAO Xiaofeng(Beijing University of Posts and Telecommunications,Beijing 100876,China)
出处
《中兴通讯技术》
2023年第6期29-38,共10页
ZTE Technology Journal
关键词
智能反射面
低开销设计
信道估计
信道反馈
相位配置
功耗开销
reconfigurable intelligent surfaces
low-overhead design
channel estimation
channel feedback
phase configuration
power con⁃sumption