Downlink Receive Beam Refinement via CSI Report Segmentation
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Solution Overview
Problem
Current 5G NR technology faces challenges in optimizing downlink receive beam refinement for improved communication efficiency, particularly in managing channel state information and interference measurement resources, which affects signal quality and interference management.
Innovation Solution
The method involves a user equipment (UE) and base station that receive and transmit channel state information (CSI) report configurations via radio resource control (RRC) signaling, enabling the UE to determine and select optimal downlink receive beams based on CSI report configurations, calculate SINR quantities, and update quasi co-location (QCL) parameters for improved communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI report configuration includes multiple resource settings for channel and interference measurement, then beam selection accuracy is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The CSI report configuration is segmented into distinct resource settings: CMR resource settings for channel measurement and IMR resource settings for interference measurement. Each resource setting can be independently configured and activated, allowing the UE to process measurements in an organized manner while maintaining configuration manageability through structured parameter groups.
Solution Approach 2:
The base station performs preliminary configuration by providing the UE with multiple CMR and IMR resource settings in advance through RRC signaling. The UE stores these pre-configured resource settings and activates them based on DCI indications, eliminating the need for dynamic reconfiguration and reducing real-time signaling overhead.
2Measurement precision
If multiple CMR and IMR resource settings are configured, then interference measurement capability is improved, but signaling overhead and processing load increase
Solution Approach 1:
Multiple CMR and IMR resource settings are pre-configured through RRC signaling in advance. The base station indicates which specific resource settings to activate using compact DCI fields, thereby reducing real-time signaling overhead while maintaining the capability to utilize multiple measurement resources for accurate interference assessment.
Solution Approach 2:
The CMR and IMR resource settings are designed to be universally applicable across different beam management scenarios. The same resource setting structures can serve multiple purposes including channel measurement, interference measurement, and beam refinement, reducing the need for separate dedicated configurations for each function.
3Measurement precision
If SINR calculation is performed for multiple downlink transmit beams, then beam refinement accuracy is improved, but calculation complexity and time increase
Solution Approach 1:
The UE calculates SINR values for multiple downlink transmit beams using pre-configured CMR and IMR resource settings before beam selection. By having measurement resources prepared in advance and using efficient measurement procedures, the UE can perform comprehensive SINR calculations across multiple beams without excessive delay, enabling accurate beam refinement based on comparative SINR analysis.
Data Source
AI summary
The present disclosure relates to methods and devices for wireless communication including an apparatus, e.g., a UE and/or base station. In one aspect, the apparatus may receive a channel state information (CSI) report configuration via radio resource control (RRC) signaling, the CSI report configuration including at least one of a channel measurement resource (CMR) resource setting, an interference measurement resource (IMR) resource setting, or a report quantity parameter. The apparatus may also determine a downlink receive beam of one or more downlink receive beams based on the CSI report configuration. The apparatus may also communicate with a base station via the downlink receive beam based on the determined downlink receive beam. Additionally, the apparatus may calculate a signal-to-interference-plus-noise ratio (SINR) quantity associated with a plurality of downlink transmit beams. The apparatus may also decode the CSI report configuration.