Recently, significant research attention has been devoted to the study ofreconfigurable intelligent surfaces (RISs) RISs are capable of reconfiguring the wireless propagation environment by exploiting the unique properties ofmetamaterials-based integrated large arrays of inexpensive antennas . The medium access control (MAC) of multiple usersaccessing an RIS-enabled channel is still in its infancy, while many open issues remain to be addressed . Wethen propose and elaborate upon centralized, distributed and hybrid AI-assisted MAC architectures in RIS-aided multi-usercommunications systems . Finally, we discuss some challenges, perspectives and potential applications of RISs as they are related to

Author(s) : Xuelin Cao, Bo Yang, Chongwen Huang, Chau Yuen, Marco Di Renzo, Zhu Han, Dusit Niyato, H. Vincent Poor, Lajos Hanzo

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Keywords : riss - mac - aided - ai - wireless -

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