RIS Codebook Multicast Control for Lower Base Station Load

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Solution Overview

Problem

Conventional Reconfigurable Intelligent Surface (RIS) networking requires significant computational resources and high overheads in codebook control signaling, with inadequate timeliness in codebook configuration.

Innovation Solution

A method for controlling RIS networking that involves determining a primary RIS and secondary RISs, generating configuration information based on their locations, and sending it in a multicast mode, allowing the secondary RISs to calculate their own codebooks, reducing the computational load on the base station and signaling overheads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the base station calculates codebooks for multiple RISs and configures them through codebook control signaling, then the RISs can be configured to fill coverage holes and improve coverage, but the computational power requirement for the base station increases significantly and the signaling overheads increase

Engineering Contradiction:

Improvecoverage qualityVSAvoidbase station computing power requirement

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the codebook configuration task by introducing a first RIS that calculates and generates codebook information for itself and secondary RISs. This divides the computational workload from the base station to the RISs themselves, reducing base station complexity while maintaining coverage quality through distributed codebook generation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first RIS performs self-configuration by calculating its own codebook information and generating codebook information for secondary RISs based on its location and the locations of other RISs. This self-service mechanism eliminates the need for the base station to perform complex calculations for all RISs, reducing computational requirements while maintaining system functionality.

Inventive Principle:

Principle #25Self-service

2Reliability

If the base station calculates and configures codebooks for multiple RISs, then the RISs can be controlled to improve coverage, but the overheads of codebook control signaling between the base station and RISs increase

Engineering Contradiction:

Improvecoverage qualityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent extracts the codebook calculation functionality from the base station and transfers it to the RISs. The first RIS extracts and generates codebook information locally based on location information, eliminating the need for extensive base station-to-RIS signaling and reducing information loss overheads while maintaining coverage control.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The first RIS performs preliminary calculations of codebook information based on its location and the locations of other RISs before actual configuration is needed. This preliminary action allows the RISs to have pre-computed codebook information, reducing the need for real-time base station calculations and associated signaling overheads.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the base station performs codebook control calculations for multiple RISs, then the RISs can be configured to enhance coverage, but the timeliness of codebook control becomes inadequate

Engineering Contradiction:

Improvecoverage enhancementVSAvoidcodebook control timeliness

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent introduces dynamic codebook generation where the first RIS calculates codebook information in real-time based on current location information of itself and other RISs. This dynamic approach allows the system to adapt to changing conditions without requiring the base station to perform time-consuming calculations, thereby improving codebook control timeliness while maintaining coverage enhancement.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The RISs perform self-configuration by locally calculating their own codebooks and generating codebook information for other RISs based on their locations. This self-service mechanism eliminates delays associated with base station calculations and signaling, achieving real-time codebook control that responds immediately to system conditions while maintaining effective coverage enhancement.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20260039334A1Control method for networking using reconfigurable intelligent surfaces, and controller and storage medium

Publication Date: 2026.02.05 ZTE CORP

AI summary

A method for controlling Reconfigurable Intelligent Surface (RIS) networking, a controller, and a storage medium are disclosed. The method may include: determining a first RIS and a second RIS from a plurality of RISs; and sending first configuration information corresponding to the first RIS to the first RIS and the second RIS, for the first RIS and the second RIS to perform codebook configuration processing.