5G NR Beam Reporting Using L1-SINR for Interference-Aware Selection
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Solution Overview
Problem
Current 5G New Radio (NR) beam management systems rely on Layer 1 Reference Signal Received Power (L1-RSRP) for beam reporting, which does not account for interference levels, limiting the gNodeB's ability to choose optimal transmit/receive beams.
Innovation Solution
Implementing Layer 1 Signal to Interference plus Noise Ratio (L1-SINR) based beam reporting, which includes measurement quantities like L1-SINR and L1-RSRP, to enable the gNodeB to consider interference levels when selecting beams for downlink and uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If L1-RSRP based beam reporting is used, then the beam reporting process is simple, but the beam selection accuracy is insufficient because interference levels are not considered
Solution Approach 1:
The patent changes the measurement parameter from L1-RSRP (power only) to L1-SINR (signal-to-interference-plus-noise ratio). This parameter change enables the beam reporting to consider both signal strength and interference levels, thereby improving beam selection accuracy without significantly increasing system complexity
Solution Approach 2:
The patent introduces an interference measurement resource (IMR) as an intermediary element that enables the UE to measure interference levels. This intermediary allows the system to obtain interference information without fundamentally changing the beam reporting mechanism, resolving the contradiction between simplicity and accuracy
2Measurement precision
If L1-SINR based beam reporting is implemented, then beam selection accuracy is improved by considering interference levels, but the measurement and reporting complexity increases
Solution Approach 1:
The patent extracts the interference measurement function into a separate resource (IMR) that can be independently configured and measured. This extraction allows the interference measurement to be performed separately from the beam measurement, reducing the complexity burden on the main beam reporting process while still improving accuracy
Solution Approach 2:
The patent segments the beam reporting process into distinct components: beam measurement (using CSI-RS or SSB), interference measurement (using IMR), and combined SINR calculation. This segmentation allows each component to be optimized independently, managing complexity while achieving accurate beam selection
Data Source
AI summary
An apparatus configured to be employed in a user equipment (UE) associated with a new radio (NR) communication system is disclosed. The apparatus comprises one or more processors configured to process a beam reporting configuration signal received from a gNodeB associated therewith. In some embodiments, the beam reporting configuration signal comprises a measurement quantity information on one or more measurement quantities to be reported by the UE to the gNodeB during beam reporting, for a set of beams associated with the gNodeB, wherein the one or more measurement quantities comprises layer 1 signal to interference plus noise ratio (L1-SINR), or both L1-SINR and L1 reference signal receive power (RSRP). In some embodiments, the beam reporting configuration signal further comprises a reference signal information on a reference signal to be utilized by the UE for measuring the one or more measurement quantities for the set of beams associated with the gNodeB.