RIS Codebook Configuration for Multi-Node Spectral Efficiency
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Solution Overview
Problem
Existing RIS deployments face inefficiencies due to static partitioning and TDM-based operations, leading to reduced spectral efficiency, increased power consumption, and limited flexibility in assisting multiple network nodes.
Innovation Solution
The implementation of a RIS codebook that dynamically configures mechanical or material properties of RIS subarrays to simultaneously assist multiple network nodes, reducing cross-link interference and optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static partitioning and TDM-based operations are used for RIS deployments, then device complexity is reduced, but spectral efficiency deteriorates
Solution Approach 1:
The patent implements dynamic RIS configuration where the RIS controller continuously adjusts the mechanical or material properties of subarrays based on real-time channel conditions and traffic demands of multiple network nodes, transitioning from static to dynamic operation to improve spectral efficiency
Solution Approach 2:
The RIS codebook enables the RIS to simultaneously assist multiple network nodes by providing universal configurations that can serve different nodes with different requirements, allowing the same RIS infrastructure to perform multiple functions for different users
2Ease of operation
If static partitioning and TDM-based operations are used for RIS deployments, then ease of operation is improved, but power consumption increases
Solution Approach 1:
The patent changes the operational parameters of RIS subarrays dynamically by adjusting mechanical positions or material properties based on actual usage requirements, allowing the system to enter low-power states when not actively serving specific nodes while maintaining operational simplicity through codebook-based configurations
3Device complexity
If static partitioning and TDM-based operations are used for RIS deployments, then device complexity is reduced, but flexibility deteriorates
Solution Approach 1:
The RIS system transitions from static to dynamic configuration, allowing real-time adaptation to different network conditions and node requirements through codebook-based control, thereby improving flexibility without proportionally increasing system complexity
Solution Approach 2:
The patent divides the RIS into multiple independently controllable subarrays, each capable of being configured differently to assist multiple network nodes simultaneously, providing fine-grained flexibility through segmented control while maintaining overall system manageability
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network entity may receive an indication of a reconfigurable intelligent surface (RIS) configuration associated with a first network node and an indication of one or more RIS codebooks associated with one or more second network nodes. The network entity may transmit, using the RIS configuration associated with the first network node, the one or more RIS codebooks associated with the one or more second network nodes, and one or more link parameters associated with the first network node, an indication of a RIS codebook containing at least one RIS configuration that is associated with the first network node and the one or more second network nodes. Numerous other aspects are described.