UE Multi-Path Channel Cluster Feedback for Beam Management
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Solution Overview
Problem
In wireless communication systems, the overhead of feedback information for multi-path channel measurements is high due to the need to report detailed channel state information for each reference signal, especially in multi-path environments, which hampers efficient beam management and scheduling.
Innovation Solution
User Equipment (UE) compresses feedback information by reporting per-path Angle of Arrival (AoA) for a defined number of dominant paths, using machine learning techniques to estimate AoA and transmit multi-path channel cluster information, reducing the overhead and latency of feedback reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed channel state information is reported for each reference signal, then measurement precision is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential channel characteristics (AoA per path) from the complete channel state information, discarding redundant data. Instead of reporting full channel matrices, the system identifies and reports only the dominant paths' AoA values, significantly reducing feedback overhead while preserving the most critical information for beam management
Solution Approach 2:
The patent transforms the channel state information representation from detailed complex channel matrices to simplified AoA parameters. By changing the reporting parameter from full channel coefficients to angular information only, the system achieves compact representation that maintains beam management functionality while reducing feedback volume
2Reliability
If comprehensive feedback information is transmitted, then beam management accuracy is improved, but network efficiency deteriorates due to high overhead
Solution Approach 1:
The system extracts only the critical AoA parameters needed for beam management from comprehensive channel state information. By reporting only dominant path AoAs rather than complete channel matrices, the patent maintains sufficient accuracy for beam selection while dramatically improving network efficiency through reduced signaling overhead
Solution Approach 2:
The patent applies partial action by reporting only the most significant channel characteristics (top dominant paths) rather than complete channel information. This selective reporting provides sufficient accuracy for beam management purposes while minimizing feedback overhead, achieving the optimal balance between reliability and productivity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. To reduce control signaling overhead, a user equipment (UE) may compress feedback information obtained by observing reference signal transmissions from a base station to generate multi-path channel cluster information. In some cases, the multi-path channel cluster information may include an angle of arrival (AoA) of one or more paths of a reference signal from the base station to the UE in a multi-path environment. The UE may be configured to support machine learning to generate the multi-path channel cluster information. The UE may transmit to the base station a feedback report that includes the multi-path channel cluster information for a defined number of paths for the reference signal. The base station may use the multi-path channel cluster information for use beam management and scheduling transmission to groups of UEs.