RIS Beamforming for Phase-Specific DMRS Reflection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing reconfigurable intelligent surface (RIS) participation in communication, particularly in configuring reflective elements to handle demodulation reference signals (DMRSs) with different phases, which affects channel quality and power control accuracy.
Innovation Solution
The method involves configuring a set of reflective elements in the RIS to reflect DMRSs using distinct beamformers associated with different phases, allowing for precise control of signal phases and phases of reflection, enabling the RIS to participate in communication by configuring reflection coefficients for each DMRS, and transmitting configuration information to reflect signals with specific phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the RIS configures reflective elements to handle DMRSs with different phases using distinct beamformers, then channel state information feedback accuracy and power control accuracy are improved, but device complexity increases
Solution Approach 1:
The patent segments the DMRS handling process by configuring different beamformers for DMRSs with different phases. The RIS controller divides the reflective element configuration into phase-specific groups, allowing precise channel state information measurement for each phase while managing complexity through structured segmentation of the configuration process.
Solution Approach 2:
The patent applies local quality by assigning specific beamformers to reflective elements based on the phase characteristics of incoming DMRSs. Each reflective element or group of elements is optimized for specific phase conditions, enabling accurate channel state information feedback for different phase scenarios while maintaining manageable system complexity through localized optimization.
2Measurement precision
If the RIS configures reflective elements to handle DMRSs with different phases using distinct beamformers, then power control accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the power control process by configuring different beamformers for DMRSs with different phases. This segmentation enables accurate power control measurements for each phase while managing configuration complexity through a structured approach that divides the reflective element configuration into phase-specific groups.
Solution Approach 2:
The patent applies local quality by optimizing specific beamformers for reflective elements handling DMRSs with particular phases. This localized optimization enables accurate power control for different phase conditions while maintaining manageable system complexity through targeted rather than universal configuration.
3Productivity
If the RIS differentiates between DMRSs with different phases, then communication efficiency is improved, but ease of operation decreases
Solution Approach 1:
The patent segments the DMRS differentiation process into phase-based groups, allowing the RIS to efficiently handle different phase conditions with dedicated beamformers. This segmentation improves communication efficiency by enabling optimized processing for each phase while providing a structured configuration approach that manages operational complexity.
Solution Approach 2:
The patent applies local quality by configuring specific beamformers for reflective elements based on DMRS phase characteristics. This enables efficient communication for different phase scenarios while the localized nature of the configuration provides a manageable approach to operation, where each phase-specific configuration can be independently optimized and maintained.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of channel state information feedback and power control by allowing the RIS to differentiate between DMRSs with different phases, improving communication efficiency and reliability.
Implementation Method 1
configuring a set of reflective elements of the RIS such that a first DMRS of the plurality of DMRSs is reflected using a first beamformer and a second DMRS of the plurality of DMRSs is reflected using a second beamformer different than the first beamformer
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a controller of a reconfigurable intelligent surface (RIS) may receive a signal including a plurality of demodulation reference signals (DMRSs). The controller of the RIS may configure a set of reflective elements of the RIS such that a first DMRS of the plurality of DMRSs is reflected using a first beamformer and a second DMRS of the plurality of DMRSs is reflected using a second beamformer different than the first beamformer. Numerous other aspects are described.