Interference-Aware Beam Reporting for Multi-TRP Beam Selection
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Solution Overview
Problem
Current wireless communication technologies, such as 5G NR, lack effective methods for accurately determining interference-related beams and optimizing beam selection based on signal-to-interference-plus-noise ratio (SINR) and reference signal received quality (RSRQ), leading to suboptimal beam management and potential interference issues in multi-user MIMO scenarios.
Innovation Solution
Introduce interference-aware beam reporting techniques that include reporting configurations for multiple panels and transmission reception points (TRPs), utilizing CSI resource settings to differentiate between transmission-related and interference-related beams, and incorporating SINR and RSRQ metrics to enhance beam determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam reporting is performed without interference awareness, then reporting overhead is reduced and operation is simpler, but beam selection accuracy deteriorates and connection reliability worsens due to interference from other TRPs
Solution Approach 1:
The UE performs preliminary interference measurement during the beam measurement phase by measuring interference on the same resources used for beam signal measurement. This preliminary action enables the UE to identify interfering TRPs before beam reporting, allowing interference-aware beam selection without adding complex reporting procedures. The interference measurement is integrated into the existing beam measurement process, maintaining operational simplicity while improving connection reliability.
Solution Approach 2:
The patent introduces an intermediary mechanism where the UE reports beam quality metrics along with interference identification information to the gNB. This intermediary reporting structure enables the gNB to make informed beam selection decisions by considering both beam quality and interference conditions, thereby improving connection reliability without requiring complex device-side interference management.
2Measurement precision
If beam reporting includes interference information, then beam selection accuracy is improved and connection reliability is enhanced, but reporting overhead increases
Solution Approach 1:
The patent extracts only the essential interference information needed for beam selection - specifically identifying interfering TRP IDs and their relative strength - and reports this extracted data along with beam quality metrics. By taking out only the critical interference elements rather than reporting complete interference channel state information, the patent achieves improved beam selection accuracy while minimizing reporting overhead.
Solution Approach 2:
The interference information reporting is applied locally and selectively - the UE reports interference details only for beams that are affected by significant interference from other TRPs. For beams without significant interference, standard beam reporting procedures are used. This local quality approach ensures measurement precision for interfered beams while avoiding unnecessary reporting overhead for non-interfered beams.
3Productivity
If multiple TRPs transmit simultaneously without coordination, then network capacity and coverage are improved, but interference increases and connection reliability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures and reports beam quality along with identified interfering TRP information to the gNB. This feedback enables the gNB to coordinate transmissions from multiple TRPs by adjusting beam directions, timing, or power levels to mitigate identified interference, thereby maintaining network capacity while improving connection reliability through coordinated multi-TRP operation.
Solution Approach 2:
The system dynamically adapts TRP transmission coordination based on real-time interference measurements and reports. The gNB uses the reported interference information to dynamically adjust beamforming parameters, transmission timing, or resource allocation for multiple TRPs, enabling the network to maintain high capacity through simultaneous TRP operation while dynamically mitigating interference to preserve connection reliability.
Data Source
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AI summary
A wireless communication method is described for a user equipment to receive a reporting configuration, measure one or more resources, and generate a report transmitted to a base station. The report may include one or more CSI values that describe signal-to-interference-plus-noise ratio (SINR) or reference signal received quality (RSRQ), where the CSI values are determined based on measuring at least some of the one or more resources. The report may also include one or more identifiers associated with at least some of one or more channel measurement resource (CMR) or at least some of interference measurement resource (IMR), or at least some of one or more CMR groups or at least some of one or more IMR groups.