6G • RAN
Cascaded Multi-Tier RIS
Multi-Hop Reconfigurable Intelligent Surface Reflection Network
Coordinated network of multiple smart metasurfaces reflecting beams around multiple sharp corners to illuminate deep indoor labyrinths.
Technical Explanation
In complex environments like multi-corridor hospitals or subterranean subway stations, a single RIS cannot establish a line of sight to deep rooms. Cascaded Multi-Tier RIS coordinates reflections across a chain of 2 to 4 metasurface tiles installed on successive hallway corners. Edge AI algorithms jointly optimize the phase reflection matrices across all surfaces simultaneously, guiding high-gain sub-THz beams around multiple right-angle corners with minimal power loss.
Key Functions
- Guides sub-THz beams around multiple sharp right-angle building corners
- Jointly optimizes phase shift matrices across cascaded metasurface chains
- Illuminates subterranean subways and complex multi-room hospital facilities
- Eliminates the cost of deploying active repeater base stations in secondary corridors
Specifications
ETSI ISG RIS 002 Network Architecture, IEEE Trans. Wireless Communications
Interfaces
Hierarchical RIS Control BusJoint Optimization Engine
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