User Terminal SINR Measurement for Beam Reporting
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Solution Overview
Problem
In next-generation mobile communication systems, existing methods for beam management in LTE and NR lack effective methods for appropriate beam selection and reporting, leading to potential decreases in communication throughput due to reliance on L1-RSRP, which does not account for interference.
Innovation Solution
A user terminal measures Signal to Interference plus Noise Ratio (SINR) using channel and interference measurement resources and reports this information, enabling more accurate beam selection and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam selection is performed based on L1-RSRP reported by UE, then beam management can be implemented, but communication throughput decreases due to interference not being considered
Solution Approach 1:
The patent changes the parameter used for beam selection from L1-RSRP to L1-SINR. By measuring and reporting SINR values instead of just RSRP, the system can identify beams with better signal-to-interference ratios, leading to more accurate beam selection that maintains reliability while improving communication throughput by avoiding high-interference beams.
Solution Approach 2:
The patent replaces the simple RSRP measurement mechanism with a more complex SINR measurement mechanism that involves both channel measurement resources and interference measurement resources. This substitution allows the system to consider interference levels in beam selection, resolving the contradiction between reliability and productivity.
2Measurement precision
If interference measurement resources are added for beam management, then beam selection accuracy improves, but device complexity increases
Solution Approach 1:
The patent makes the measurement resources serve multiple functions. The channel measurement resources and interference measurement resources are configured to work together for SINR calculation, and the same resources can be used for both beam management and channel quality assessment. This multi-functionality reduces the need for separate dedicated resources, thereby limiting the increase in device complexity while maintaining measurement precision.
Solution Approach 2:
The patent implements a feedback mechanism where the UE measures SINR based on channel and interference measurement resources, then reports the L1-SINR and beam indicator back to the base station. This feedback loop enables the base station to use the measurement data for beam selection decisions, improving measurement precision while the standardized feedback format keeps the complexity manageable.
Data Source
AI summary
A user terminal includes a control section that measures a Signal to Interference plus Noise Ratio (SINR), based on a channel measurement resource at a given order in a channel measurement resource set and an interference measurement resource at the given order in an interference measurement resource set, and a transmitting section that reports the SINR and an indicator related to the given order. According to an aspect of the present disclosure, it is possible to perform appropriate beam reporting.