苏鑫：智能超表面商用化考量

苏鑫 Su Xin中国移动研究院China Mobile Research Institute2023年12月6日智能超表面商用化考量Commercialization Considerations for RIS 智能超表面应用场景 Usage Scenarios典型场景下性能效果 Performance智能超表面的商用挑战 Commercial Challenges面向低功耗和易部署的智能超表面设计 Low-Power and Easily Deployable Design for RIS总结 Summary 2智能超表面应用场景 Usage Scenarios原理 将原有自然不可控电磁传播环境变为人为可控的电磁传播环境Principle Turning the original natural uncontrollable electromagnetic propagation environment into an artificially controllable one场景 Scenarios•提升传统网络性能：覆盖补盲，上行增强，室内覆盖增强，小区容量增强/热点增流Enhance traditional network performance: blind coverage, uplink enhancement, indoor coverage enhancement, capacity enhancement/hotspot•催生更多新型应用：低空航路/车联网覆盖，感知和高精度定位，安全通信，能量收集......Spawning more novel applications: low altitude airway/vehicle network coverage, sensing and high precision localization, secure communications, energy harvesting航路覆盖智能反射面窃听者 安全通信 车联网覆盖高精度定位基站x覆盖补盲上行增强智能反射面智能反射面室内覆盖增强热点增流室内用户blind coverageuplink enhancementindoor coveragehotspotlow altitude airway/vehicle network coverage high precision localizationsecure communications 3不同场景的商用需求 Commercial Requirements产业成熟度决定了应用场景的可实现性，对于不同场景、不同阶段，需要采取分步走的商用推进策略，以充分发挥智能超表面的技术优势 Industrial maturity determines the realizability of application scenarios. For different scenarios and stages, a step-by-step commercial promotion strategy is needed to give full play to the technological advantages of smart hypersurfaces阶段Stages典型应用Typical applications商用需求Commercial Requirements方案策略Strategies共性需求 Common与场景相关的需求Scenario-specific1覆盖补盲（5G-A）Blind Coverage (5G-A)以现有的产业成熟度和信道模型，5G-A的典型应用场景为覆盖补盲Typical application scenarios for 5G-A with existing industry maturity and channel models低成本Low cost低功耗Low powerconsumption易部署Easy Deployment非标准化 non-standardized偏硬件实现类方案 Hardware implementation静态/半静态控制 static/semi-static control对终端透明transparent to terminals2覆盖补盲 Blind Coverage容量提升 Capacity Enhancement传统网络性能提升Traditional network performance enhancement易部署Easy Deployment标准化 Standardization动态控制 Dynamic control对终端透明or非透明 Transparent or nontransparent to terminals3新型应用 New Application易部署Easy Deployment多形态polymorphic各种控制方式共存 Coexistence ofvarious control methods与具体应用场景适配 Adaptation to specific scenarios 智能超表面应用场景 Usage Scenarios典型场景下性能效果 Performance智能超表面的商用挑战 Commercial Challenges面向低功耗和易部署的智能超表面设计 Low-Power and Easily Deployable Design for RIS总结 Summary 5典型场景下性能效果 Performance部署RIS对边缘用户影响明显，边缘用户RSRP提升约3.3 dB，边缘用户SINR提升1.45 dB，边缘吞吐量提升约 79 Mbps；部署RIS后，覆盖距离延伸约60米 Deployment of RIS has a significant impact on edge users, with an increase of about 3.3 dB in RSRP for edge users, 1.45 dB in SINR for edge users, and an increase of about 79 Mbps in throughput at the edge; after deployment of RIS, the coverage distance is extended by about 60 meters红色阴影标记部分即覆盖延伸区域江苏移动+东南大学：2.6 GHz 单静态反射板 16x32 Single Static广东移动+华为+港中文（深圳）：2.6 GHz 单半静态反射板 16x16 Single Semi-Static性能指标 Metric增益 Gain下行DLRSRP(dB)3.52SINR(dB)3.42Area(퐀퐀)800.12 上行ULRSRP(dB)1.80SINR(dB)5.82Area (퐀퐀)800.92 透明膜超表面 Transparent Meta Surface针对于2.6GHz电磁波以60°斜入射至单层钢化玻璃增透膜可有效提高信号强度约2.9 dB，对于4.9GHz电磁波提升强度约5.7 dBFor 2.6 GHz electromagnetic wave with 60° angled incidence to a single layer of tempered glass transmittance enhancement film can effectively improve the signal strength of about 2.9 dB, for 4.9 GHz electromagnetic wave enhancement strength of about 5.7 dB.覆盖增强：考虑投入产出比，工作模式选择灵活度高 Coverage enhancement：High flexibility in working modes, considering the input-output ratio静态/半静态：非标准化，主要考虑能耗和供电，室内外覆盖要考虑透明性——偏实现类的方案Static/semi-static： Non-standardized, mainly consider energy consumption and power supply, indoor and outdoor coverage to consider 6典型场景下性能效果 Performance覆盖增强：考虑投入产出比，工作模式选择灵活度高 Coverage enhancement：High flexibility in working modes, considering the input-output ratio动态：标准化，主要考虑能耗、供电，以及相比于NCR的综合增益（性能、部署）Dynamic: standardized: dynamic, mainly considering energy consumption, power supply, and overall gain over NCR (performance, deployment)•低频场景，RIS的性能优势更加明显 In low-frequency scenarios, the performance advantage of RIS is more obvious•可借鉴现有NCR架构，对终端透明 Can draw on existing NCR architecture, transparent to terminals•重点考虑节能设计，简化控制链路 Focus on energy-efficient design and simplified control linksNCRNCR-MT接入链路Access linkNCR-Fwd共用射频Common RF控制链路Control link回程链路Backhual linkRIS控制模块ControllerDLUL共用射频Common RF反射Reflection低频场景下，由于NCR会同步放大噪声和干扰，RIS的SINR的性能优势更显著高频覆盖增强场景下，想要获得与NCR相当的性能，需要超大规模的RIS阵子数，进而会大概率出现近场效应In low-frequency scenarios, the performance advantage of RIS's SINR is more significant since NCR can amplify noise and interferenceIn high-frequency scenarios, to obtain performance comparable to that of NCR, an ultra-large number of RIS arrays is required, which in turn will have a high probability of near-field effects 7典型场景下性能效果 Performance容量提升：面向小区中信道条件较好的用户，利用信道状态信息对相位进行更为精准的调控Capacity enhancement：For users with better channel conditions in the cell, the channel state information is used to regulate the phase more accurately•无源RIS如何获取信道状态信息，级联 or 分段 How passive RIS obtains channel state information, cascade or segmentation•信道状态信息获取的开销 vs 性能增