Beam Management via Synchronization Signal Feedback
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beams for millimeter wave communications due to high path losses, where existing beam management techniques lack effective methods for reporting channel feedback on beamformed synchronization signals.
Innovation Solution
The proposed solution involves a user equipment (UE) reporting metrics such as received signal power and beam identifiers for synchronization signals (SSs) using a channel state information reference signal (CSI-RS) framework, enabling efficient beam management by identifying and configuring feedback resource sets and performing channel measurements to determine optimal transmission beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamformed directional transmissions are used to overcome path loss in millimeter wave systems, then signal reception quality is improved, but the complexity of beam management and feedback reporting increases
Solution Approach 1:
The patent applies universality by making the CSI reporting framework multi-functional to handle both traditional CSI-RS and synchronization signals. The same reporting mechanism, resource indicators, and feedback procedures are used for different signal types, eliminating the need for separate beam management protocols and reducing overall system complexity while maintaining reliable signal reception through beamforming
2Measurement precision
If separate reporting mechanisms are created for beamformed synchronization signals, then beam management precision is improved, but the loss of time for feedback processing increases
Solution Approach 1:
The patent merges the reporting of synchronization signal measurements with the existing CSI reporting framework. By combining these functions into a single unified process, the patent achieves precise beam management through resource indicator reporting while avoiding the time loss that would result from separate, redundant feedback mechanisms
3Measurement precision
If detailed channel feedback is reported for each beamformed signal, then beam selection accuracy is improved, but the quantity of feedback data and processing overhead increases
Solution Approach 1:
The patent extracts only the essential beam identification information (resource indicators) from the full channel state feedback. Instead of reporting complete channel matrices for each beam, the system extracts and reports only the key parameters needed for beam selection, maintaining accuracy while significantly reducing feedback data quantity and processing overhead
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. In aspects of the present disclosure, a user equipment (UE) may report metrics (e.g., received signal power, beam identifier) about synchronization signal (SS) beams using the same (e.g., or a similar) framework that is used for channel state information reference signal (CSI-RS) reporting. Because SSs are intended to be broadcast across a wide coverage area in a beamformed manner, the SSs represent a promising complement to existing beam management techniques. Accordingly, beam management may be achieved at least in part based on reporting one or more metrics of beamformed SSs through a channel feedback framework.