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1、1AbstractIn the emerging study of 6G technology,Reconfigurable Intelligent Surface(RIS)is a new type of artificial electromagnetic surface that can intelligently anddynamicallycontroltheelectromagneticcharacteristicsofeachunitoftheelectromagnetic surface through digital programming.It will realize a

2、ccurate andefficient control of electromagnetic waves and change the electromagnetic wavepropagation environment,bringing a new 6G airspace transmission paradigm to thefuture.This white paper introduces RIS from multiple perspectives such as applicationscenarios,requirements,key technologies and alg

3、orithms,current research status,field verification,and proposes suggestions on industry maturity,developmentdirection,and standardization research direction.2ContentsAbstract.1Chapter I Overview.31.1.Concept.31.2.PotentialApplication Scenarios and Requirements.41.3.Current Research at Home and Abroa

4、d.5References.9Chapter II Key Technologies andAlgorithms of RIS.112.1.RIS Structure Design and Adjustment.112.3.Channel Estimation and Feedback.142.3.1.Analysis on difficulties of channel estimation.172.3.2.RIS-based channel estimation and feedback algorithm.182.3.3.Future Research Direction of RIS

5、Channel Estimation and Feedback202.4.Beamforming Design.202.4.1.Common Parameter Optimization Algorithms.232.4.2.Application Scenarios.24References.26Chapter III RIS Realization and Prototype Validation.283.1.Experimental Validation 1.283.2.Experimental Validation 2.333.3.Experimental Validation 3.3

6、7References.38Chapter IV Technical Challenges and Standardization.394.1.Technical Challenges.394.2.Standardization Research Directions.40Acknowledgment.41Acronyms.423Chapter I Overview1.1.ConceptAbout every ten years,there is a new generation of cellular mobile communication systems,in which new key