Power Headroom Report Segmentation for Multi-Panel 5G Uplink
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Solution Overview
Problem
The introduction of multiple panels in 5G NR systems complicates uplink power control, as existing Power Headroom Reports (PHRs) are designed for single-panel scenarios, leading to inefficiencies in power control and increased hardware complexity.
Innovation Solution
A method for wireless communications that involves receiving and transmitting information sets indicating reference signal resource sets, with target signals containing power difference values to improve PHR reporting efficiency, reduce signaling overhead, and share transmit power between panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing PHR designs for single-panel scenarios are used in multi-panel scenarios, then the PHR reporting structure remains simple, but power control efficiency deteriorates and hardware complexity increases
Solution Approach 1:
The patent segments the PHR reporting structure by introducing separate power headroom fields for each panel (e.g., PHR-Panel1, PHR-Panel2) and separate power difference fields (PD-Panel1, PD-Panel2). This segmentation allows independent power control for each panel, improving power control efficiency while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent adds a panel dimension to the traditional PHR structure. Instead of a single power headroom value, the system now reports power headroom across multiple panels (spatial dimension), enabling multi-panel power control without exponentially increasing complexity through systematic field organization.
2Reliability
If multiple panels are introduced for simultaneous transmission, then spatial diversity gain is improved, but PHR reporting complexity increases
Solution Approach 1:
The patent segments PHR reporting into panel-specific components, with each panel having its own power headroom and power difference fields. This segmentation enables spatial diversity through multiple panels while controlling reporting complexity through a modular, systematic structure that scales predictably with the number of panels.
3Measurement precision
If separate power control is implemented for each panel, then uplink power control accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple power control indicators (power headroom and power difference) into a unified PHR reporting mechanism. By combining these related parameters into a single structured report with systematic field organization, the patent reduces signaling overhead compared to separate reporting mechanisms while maintaining accurate per-panel power control.
Solution Approach 2:
The patent creates a universal PHR structure that handles both single-panel and multi-panel scenarios through a consistent field organization pattern. This multi-functional design allows the same reporting mechanism to serve different panel configurations, reducing signaling overhead by avoiding separate specialized reporting protocols.
Data Source
AI summary
A node first receives a first information set, the first information set is used to indicate a first reference signal resource set and a second reference signal resource set; then transmits a target signal, the target signal comprises a second information set; the second information set comprises a first power difference value; the first power difference value is equal to a difference value of a first target power value minus a first reference power value, and the first reference power value is equal to a sum of a first power value and a second power value; the first power value is associated with the first reference signal resource set, and the second power value is associated with the second reference signal resource set. This improves the reporting method of power headroom when the terminal is configured with multiple reference signal resource sets to improve spectrum efficiency.