Using RIS to go around, rather than through, obstacles

This report is the first part of a new series – called 5G Next – to better understand the next phase of the 5G era and to highlight promising technology innovations that are shaping networks. This report explores reconfigurable intelligent surface (RIS) solutions, which can help with the delivery of cost-efficient 5G deployment and make more economical use of higher spectrum bands in indoor and dense urban environments. The control of radio frequency signal reflections has now reached a level of development where operators can consider using an intermediate network element between base station antennas and user equipment. RIS innovation can help operators in terms of capex-efficient network densification, operational cost efficiencies (mostly electricity) and increased coverage. Of course, as with any cutting-edge innovation, there are also risks and challenges to consider.