Power Headroom Reporting Across Multiple SRS Resource Sets
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Solution Overview
Problem
Existing multicarrier communication systems face challenges in efficiently managing power headroom reporting and beam management in wireless devices, particularly in scenarios involving multiple sounding reference signal resource sets, which can lead to suboptimal resource allocation and reduced communication efficiency.
Innovation Solution
The implementation of a power headroom report mechanism that includes multiple entry MAC CEs for reporting power headroom across different beam pairs, allowing for dynamic adjustment and optimization of transmission parameters based on current beam conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sounding reference signal resource sets are configured for beam management, then beam management capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the beam management process by associating each sounding reference signal resource set with a specific beam pair and power headroom report. This segmentation allows the device to manage multiple beams independently through separate resource sets, improving beam management capability while organizing complexity into manageable segments through the MAC CE reporting structure
Solution Approach 2:
The patent creates a universal MAC CE structure that can handle multiple sounding reference signal resource sets through a single reporting mechanism. The MAC CE format is designed to accommodate variable numbers of resource sets and beam pairs, providing multi-functionality that improves adaptability without proportionally increasing device complexity
2Measurement precision
If power headroom reporting is performed for multiple beam pairs, then power management accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple power headroom reports for different beam pairs into a single MAC CE structure. Instead of transmitting separate reports for each beam pair, the invention combines them into one unified MAC CE that contains power headroom information for multiple sounding reference signal resource sets, thereby maintaining power management accuracy while reducing signaling overhead
Solution Approach 2:
The MAC CE structure implements a nested organization where power headroom information for multiple beam pairs is embedded within a single reporting framework. The first MAC CE contains power headroom for a first beam pair, while a second MAC CE can contain power headroom for a second beam pair, with both nested within the overall power headroom reporting structure, efficiently packing information to reduce overhead
Data Source
AI summary
A wireless device receives a radio resource control message comprising a first sounding reference signal (SRS) resource set identifier of a first SRS resource set of a serving cell and a second SRS resource set identifier of a second SRS resource set of the serving cell. The wireless device transmits a power headroom report (PHR) medium access control control element (MAC CE) comprising a first field indicating a first power headroom value associated with the first SRS resource set and a second field indicating a second power headroom value associated with the second SRS resource set. The order of the first field and the second field in the PHR MAC CE is based on an ascending order of the first SRS resource set identifier and the second SRS resource set identifier.