Subband Beam Reporting for Precise Channel Measurement
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in beam reporting, particularly due to measurements being performed at a wideband granularity, which can lead to imprecise channel condition information and increased resource usage, limiting the flexibility and accuracy of beam selection.
Innovation Solution
Implementing subband beam reporting by configuring channel measurement resources and interference measurement resources at a subband granularity, allowing for more precise measurements and improved beam selection through the transmission of configuration information indicating whether the beam report is associated with subband or wideband granularity, based on CSI-RS or SSB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam reporting is performed at wideband granularity, then resource usage is reduced and implementation is simpler, but measurement precision and beam selection accuracy deteriorate
Solution Approach 1:
The patent divides the wideband frequency range into multiple subbands, allowing beam reporting to be performed at a finer granularity level. This segmentation enables more precise measurement of channel conditions in specific frequency portions, improving beam selection accuracy without requiring complete reimplementation of the reporting system.
Solution Approach 2:
The patent introduces dynamic configuration where the network can flexibly switch between wideband and subband reporting granularities based on channel conditions and service requirements. This dynamic adaptability allows the system to optimize between accuracy and complexity in real-time, resolving the contradiction between measurement precision and reporting complexity.
2Measurement precision
If beam reporting is performed at subband granularity, then measurement precision and beam selection accuracy are improved, but resource usage increases
Solution Approach 1:
The patent applies local quality by performing measurements and generating reports at subband level only where needed, rather than uniformly across the entire wideband. This allows the system to achieve high measurement precision in specific frequency regions with high channel variability while reducing overall resource consumption by not applying subband reporting everywhere.
Solution Approach 2:
The patent changes the granularity parameter of beam reporting from fixed wideband to configurable subband width. By adjusting this parameter based on channel conditions and service requirements, the system can optimize the balance between measurement precision and resource usage, using finer granularity only when necessary for accurate beam selection.
3Adaptability or versatility
If beam reporting is performed at wideband granularity, then implementation is simpler and resource usage is reduced, but flexibility in beam selection deteriorates
Solution Approach 1:
The patent creates a universal beam reporting framework that can operate at multiple granularity levels (wideband and subband). This multi-functionality allows the same system to adapt to different service requirements and channel conditions, providing both simple wideband reporting for basic scenarios and detailed subband reporting for advanced scenarios, thereby improving flexibility without proportionally increasing complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information for a beam report, wherein the configuration information indicates whether the beam report is associated with at least one of a subband granularity or a wideband granularity, wherein the beam report is for a reference signal received power (RSRP) measurement or a signal to interference plus noise ratio (SINR) measurement, and wherein the beam report is based at least in part on a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB). The UE may determine the beam report based at least in part on the configuration information. The UE may transmit the beam report. Numerous other aspects are provided.