Recently,Reconfigurable Intelligent Sur-faces(RISs)have been introduced to provide the nec-essary flexibility for the design of the Smart Radio En-vironment(SRE),which can be optimally shaped to facilitate efficient signal transmissions.In line with the concept of smart cities,SRE needs to be care-fully designed with respect to the city infrastructure and utilization of resources.In this paper,we pro-vide our vision on RIS integration into future Smart Cities by highlighting the potential technical,envi-ronmental,and economic motivations of RIS deploy-ment in harmony with various ecosystems at a city level such as buildings facades.To this end,we are pointing out some scenarios for mitigating the con-flict between RIS realization and the existing building fa?ade's ecosystems such as advertising display and solar cells on building walls.Also,in this fashion,the proposed vision supports a win-win relationship be-tween all stakeholders of different ecosystems.This study presents guidelines for not only enabling seam-less economically accepted RIS widespread utilization but,also more technically sounding SRE by support-ing enhanced RIS features and more advanced applica-tions that cannot be attained by traditional passive RIS.Moreover,based on the current research directions,we offer promising insights for cost-effective mass pro-duction through motivating two scenarios of"all on silicon"and"all as metasurface"fabrication technol-ogy.With this study,we aim to encourage the meta-surface researchers,that for a broad deployment of the technical solution,economic,environmental,and other commercial requirements should be planned to-gether,early on in the design phase.

Department of Electrical Engineering,Sohag University,Sohag,Egypt;Department of Computer Science,University of Cyprus,Nicosia,Cyprus;Visiting Professor,University of Johannesburg,Department of Electrical and Electronic Engineering Science,Johannesburg,South Africa;Department of Electrical Engineering,Aswan University,Aswan,Egypt

[1]Mostafa Salah;Andreas Pitsillides;Ahmed S.Mubarak-.Paving the Way for Economically Accepted and Technically Pronounced Smart Radio Environment)[J].中国通信（英文版）,2022(08):247-266

Paving,Accepted,Technically,Pronounced,RISs,facades

Way,Economically,Smart,Radio,Environment,Recently,Reconfigurable,Intelligent,Sur,faces,have,been,introduced,provide,nec,essary,flexibility,SRE,which,optimally,shaped,facilitate,efficient,signal,transmissions,concept,smart,cities,needs,care,fully,designed,respect,city,infrastructure,utilization,resources,this,paper,vision,integration,into,future,Cities,by,highlighting,potential,motivations,harmony,various,ecosystems,level,such,buildings,To,end,pointing,out,some,scenarios,mitigating,flict,between,realization,existing,advertising,display,solar,cells,walls,Also,fashion,proposed,supports,win,relationship,stakeholders,different,This,study,presents,guidelines,only,enabling,seam,less,economically,accepted,widespread,but,also,more,technically,sounding,enhanced,features,advanced,applica,that,cannot,attained,traditional,passive,Moreover,current,directions,offer,promising,insights,cost,effective,mass,duction,through,motivating,two,silicon,metasurface,fabrication,technol,ogy,With,aim,encourage,researchers,broad,deployment,solution,environmental,other,commercial,requirements,should,planned,gether,early,phase

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