IRS Codebook Control Without Separate CSI Collection
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Solution Overview
Problem
The existing intelligent reflecting surface (IRS) devices are passive and require separate devices to collect channel state information (CSI), increasing costs and technical burden.
Innovation Solution
A control device that determines a control pattern for the IRS based on a codebook, which classifies reference values into clusters and generates representative values to control the IRS without requiring CSI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate device is provided to collect CSI for IRS control, then the IRS can be controlled accurately, but the cost and technical burden increase
Solution Approach 1:
The patent combines the IRS control function with existing network devices (base station or access point) that already possess channel estimation capabilities. Instead of adding a separate CSI collection device, the control device is integrated into the existing network infrastructure, allowing the same device to perform both channel estimation and IRS control based on the obtained CSI.
Solution Approach 2:
The patent makes the existing network device serve multiple functions: it acts as both the communication node and the CSI collection device, and also as the IRS control device. This multi-functionality eliminates the need for dedicated separate devices while maintaining accurate CSI-based IRS control.
2Reliability
If a separate device is provided to collect CSI for IRS control, then the IRS control can be implemented, but the cost increases
Solution Approach 1:
The patent merges the functions of CSI collection and IRS control into a single existing network device, thereby reducing the total number of devices required while maintaining reliable IRS control through accurate CSI obtained by the integrated device.
3Measurement precision
If CSI is required for IRS control, then the IRS can be controlled precisely, but the technical burden is imposed
Solution Approach 1:
The patent combines the channel estimation function already present in network devices with the IRS control function. The control device utilizes the CSI obtained through existing channel estimation procedures, thereby achieving precise IRS control without adding operational complexity for separate CSI collection processes.
Solution Approach 2:
The network device performs channel estimation on its own to obtain CSI, which it then uses for IRS control. This self-service approach eliminates the need for external CSI collection mechanisms, reducing operational complexity while maintaining measurement precision.
Data Source
AI summary
A control device includes: a control pattern selection unit configured to select a control pattern for an IRS based on a codebook and a reference value acquired from a target of the IRS, the codebook indicating a correspondence relation between a representative value specified based on the reference value and the control pattern for the IRS; and a control unit configured to control the IRS based on the control pattern. The codebook is generated by clustering a plurality of reference value samples of a target of an IRS into a plurality of clusters, calculating a representative value in each cluster based on reference values clustered in each cluster, calculating a control pattern corresponding to the representative value, and calculating a correspondence relation between the representative value and the control pattern.