Dr. Yifei Yuan holds the title of Chief Expert of China Mobile Research Institute. He received his Bachelor & Master degrees from Tsinghua University, of China, and a Ph. D degree from Carnegie Mellon University, USA. He was with Alcatel-Lucent from 2000 to 2008, working on 3G/4G key technologies. From 2008 to 2020, he was with ZTE as technical director and Chief Engineer, responsible for standards research on LTE-Advanced and 5G. Since January 2020, he has been with China Mobile Research Institute, responsible for advanced research of 6G air interface. His research interests include MIMO, channel coding, non-orthogonal multiple access (NOMA), internet-of-things (IoT), and their standardizations in 3GPP with receiving worldwide attention and recognition. He has more than 80 journal/conference papers and 150 granted patents. He is the Editor-in-Chief of Hans Wireless Communications, an Editor of IEEE Communications Letters and an Editor of China Communications. He is the leading Guest Editor of Special Issue on Reconfigurable Intelligent Surface (RIS) of ZTE Communications (Vol. 20, No.1, 2022) and TPC member of GLOBECOM 2022 RIS symposium (on going). He serves as Industry Liaison Officer of IEEE Emerging Technology Initiative (ETI) on RIS.Yuhong Huang is the General Director of China Mobile Research Institute where she has been since 1996, Mrs.Yuhong Huang also serves as a member of Board of Directors of NGMN and O-RAN alliance. She received her Bachelor & Master degrees from Beijing University of Posts and Telecommunications, of China. She has been a China national technical leader with being responsible for GSM, WLAN, 3G through to 5G and 6G research and development. She won 20 awards from China Central Government, including a National Special Prize for Scientific and Technological Progress on 4G TD-LTE (7th contributor). She has been admitted to “The New Century Talents Project” and granted the honors of “Young Professionals with Outstanding Contributions” and “National Model Worker” in China. She also serves as the Secretary General of GTI. She has submitted over 600 contributions to standards meetings of 3GPP, ITU, etc. She has led or participated 8 national industry research projects.Dr. Fa-Long Luo is the Chief Scientist of Micron Technology Inc., USA and IEEE Fellow, Dr. Luo is now also an Affiliate Full Professor of Electrical Engineering Department at the University of Washington in Seattle. He has 39 years academic, industry and research experience with emphasis on the translation of adaptive signal processing techniques to practical applications and commercial products related to wireless communications, multimedia and digital broadcasting.

• PrefaceAbout the AuthorsChapter 1: Fundamentals of Metasurfaces for Wireless CommunicationsIntroduction of Metamaterial and Metasurface Evolutions of Reconfigurable Intelligent Surface (RIS)–Related Wireless Technologies Multi-Antenna Technology Coordinated Multi-Point Processing (CoMP) Micro/Pico/femto Cells RelaySystem Performance Requirements for 6G Application ScenariosKey Performance IndicatorsBasics about Performance Evaluation Methodologies Chapter 2: Modeling of a RIS for Wireless CommunicationsOverview of Channel Models for Mobile CommunicationsLarge-Scale Fading ModelsSmall-Scale Fading ModelsSpatial Channel Models Simplified Model for Spatial Channels Antenna Models and Configurations Large-Scale Channel Models for a RISFree-Space Pathloss Models for a RISMore Realistic Large-Scale Fading Models for RISSmall-Scale Channel Models for RISElectromagnetic Field Modeling of Metasurface StructuresChapter 3: Designs of Metasurface DevicesBasic Design Principles of Metasurface DevicesTypical Metamaterials and DevicesBasic Structures of Metamaterial Devices Design Principles of MetasurfaceActive RIS ElementsSimulations and Measurements of Metasurface DevicesElectromagnetic SimulationsPerformance Testing of Actual DevicesControl of Metasurface Devices Non-Ideal Characteristics Control Mechanisms of Tunable Metasurface Codebook Designs of the RISUniqueness of Codebook Design for the RISExamples of the RIS Codebook Designs Near-Field CommunicationsNear-Field Basics Polar Coordinates for the Near-Field Beam Squinting in Wideband Operation and SolutionsMetasurface-Based Beamforming at the Base Station Chapter 4: System Implementations of a RIS for Wireless CommunicationsBasic System Models and Performances for Metasurface-Based Relay System Models Theoretical Performance Analysis Simplified Model and Performance AnalysisBeamforming Techniques for a RIS Beam-Based TechniquesRandom-Sampling-Based TechniqueRIS Channel Estimation and Feedback for Small-Scale FadingDirection Finding Via Time-Space CodingLink-Level SimulationsSimulation Parameters and MethodologyPreliminary Link-Level Simulation ResultsSystem-Level SimulationsSystem Configurations and Simulation Preliminary Simulation ResultsChapter 5: Standardization and Trials of RIS-Aided Wireless Communications Overview and Key Features of Relay Technology in StandardizationPotential Deployment ScenariosBasic Categories of an LTE RelayType 1 Relay Type 2 Relay Brief Discussion on an LTE Full-Dimensional MIMOField TrialsRIS Trial in Nanjing RIS Trial in ShenzhenStandardization Road Map for the RIS Lessons Learned from the LTE Era Different Modes of Operation for the RIS3GPP Release 18 Network-Controlled RepeaterComparison Between Network-Controlled Repeater and RISFuture Road Map for RIS Standardization Index

Dr. Yifei Yuan holds the title of Chief Expert of China Mobile Research Institute. He received his Bachelor & Master degrees from Tsinghua University, of China, and a Ph. D degree from Carnegie Mellon University, USA. He was with Alcatel-Lucent from 2000 to 2008, working on 3G/4G key technologies. From 2008 to 2020, he was with ZTE as technical director and Chief Engineer, responsible for standards research on LTE-Advanced and 5G. Since January 2020, he has been with China Mobile Research Institute, responsible for advanced research of 6G air interface. His research interests include MIMO, channel coding, non-orthogonal multiple access (NOMA), internet-of-things (IoT), and their standardizations in 3GPP with receiving worldwide attention and recognition. He has more than 80 journal/conference papers and 150 granted patents. He is the Editor-in-Chief of Hans Wireless Communications, an Editor of IEEE Communications Letters and an Editor of China Communications. He is the leading Guest Editor of Special Issue on Reconfigurable Intelligent Surface (RIS) of ZTE Communications (Vol. 20, No.1, 2022) and TPC member of GLOBECOM 2022 RIS symposium (on going). He serves as Industry Liaison Officer of IEEE Emerging Technology Initiative (ETI) on RIS.Yuhong Huang is the General Director of China Mobile Research Institute where she has been since 1996, Mrs.Yuhong Huang also serves as a member of Board of Directors of NGMN and O-RAN alliance. She received her Bachelor & Master degrees from Beijing University of Posts and Telecommunications, of China. She has been a China national technical leader with being responsible for GSM, WLAN, 3G through to 5G and 6G research and development. She won 20 awards from China Central Government, including a National Special Prize for Scientific and Technological Progress on 4G TD-LTE (7th contributor). She has been admitted to “The New Century Talents Project” and granted the honors of “Young Professionals with Outstanding Contributions” and “National Model Worker” in China. She also serves as the Secretary General of GTI. She has submitted over 600 contributions to standards meetings of 3GPP, ITU, etc. She has led or participated 8 national industry research projects.Dr. Fa-Long Luo is the Chief Scientist of Micron Technology Inc., USA and IEEE Fellow, Dr. Luo is now also an Affiliate Full Professor of Electrical Engineering Department at the University of Washington in Seattle. He has 39 years academic, industry and research experience with emphasis on the translation of adaptive signal processing techniques to practical applications and commercial products related to wireless communications, multimedia and digital broadcasting.

• PrefaceAbout the AuthorsChapter 1: Fundamentals of Metasurfaces for Wireless CommunicationsIntroduction of Metamaterial and Metasurface Evolutions of Reconfigurable Intelligent Surface (RIS)–Related Wireless Technologies Multi-Antenna Technology Coordinated Multi-Point Processing (CoMP) Micro/Pico/femto Cells RelaySystem Performance Requirements for 6G Application ScenariosKey Performance IndicatorsBasics about Performance Evaluation Methodologies Chapter 2: Modeling of a RIS for Wireless CommunicationsOverview of Channel Models for Mobile CommunicationsLarge-Scale Fading ModelsSmall-Scale Fading ModelsSpatial Channel Models Simplified Model for Spatial Channels Antenna Models and Configurations Large-Scale Channel Models for a RISFree-Space Pathloss Models for a RISMore Realistic Large-Scale Fading Models for RISSmall-Scale Channel Models for RISElectromagnetic Field Modeling of Metasurface StructuresChapter 3: Designs of Metasurface DevicesBasic Design Principles of Metasurface DevicesTypical Metamaterials and DevicesBasic Structures of Metamaterial Devices Design Principles of MetasurfaceActive RIS ElementsSimulations and Measurements of Metasurface DevicesElectromagnetic SimulationsPerformance Testing of Actual DevicesControl of Metasurface Devices Non-Ideal Characteristics Control Mechanisms of Tunable Metasurface Codebook Designs of the RISUniqueness of Codebook Design for the RISExamples of the RIS Codebook Designs Near-Field CommunicationsNear-Field Basics Polar Coordinates for the Near-Field Beam Squinting in Wideband Operation and SolutionsMetasurface-Based Beamforming at the Base Station Chapter 4: System Implementations of a RIS for Wireless CommunicationsBasic System Models and Performances for Metasurface-Based Relay System Models Theoretical Performance Analysis Simplified Model and Performance AnalysisBeamforming Techniques for a RIS Beam-Based TechniquesRandom-Sampling-Based TechniqueRIS Channel Estimation and Feedback for Small-Scale FadingDirection Finding Via Time-Space CodingLink-Level SimulationsSimulation Parameters and MethodologyPreliminary Link-Level Simulation ResultsSystem-Level SimulationsSystem Configurations and Simulation Preliminary Simulation ResultsChapter 5: Standardization and Trials of RIS-Aided Wireless Communications Overview and Key Features of Relay Technology in StandardizationPotential Deployment ScenariosBasic Categories of an LTE RelayType 1 Relay Type 2 Relay Brief Discussion on an LTE Full-Dimensional MIMOField TrialsRIS Trial in Nanjing RIS Trial in ShenzhenStandardization Road Map for the RIS Lessons Learned from the LTE Era Different Modes of Operation for the RIS3GPP Release 18 Network-Controlled RepeaterComparison Between Network-Controlled Repeater and RISFuture Road Map for RIS Standardization Index