Power Headroom Reporting for Reference Signal Resource Sets
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Solution Overview
Problem
There is a level mismatch between the calculation and reporting of Type 3 power headroom in current wireless communication standards, leading to inefficiencies in uplink power control.
Innovation Solution
The method involves reporting power headroom information at the reference signal resource set level, including specific indication information to align the reporting level with the calculation level, using a power control method and apparatus that determines and sends power headroom corresponding to one or more reference signal resource sets in each cell, and adjusts uplink transmit power based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Type 3 power headroom is calculated at reference signal resource set level, then power control precision is improved, but reporting level mismatch occurs causing system complexity
Solution Approach 1:
The patent segments the power headroom reporting by introducing a new Type 4 power headroom specifically for positioning reference signals, separate from the existing Type 3 power headroom for SRS. This segmentation allows each type to be reported at its appropriate granularity level without causing system complexity
Solution Approach 2:
The patent adds a new dimension to power headroom reporting by introducing Type 4 as a distinct category. This dimensional addition resolves the level mismatch problem by providing a dedicated reporting mechanism for positioning reference signals at the reference signal resource set level, while maintaining compatibility with existing UL carrier level reporting
2Adaptability or versatility
If power headroom reporting is done at UL carrier level, then system compatibility is maintained, but power control accuracy deteriorates
Solution Approach 1:
The patent segments power headroom reporting into multiple types: Type 1 for PUCCH, Type 2 for PUSCH, Type 3 for SRS, and Type 4 for positioning reference signals. This segmentation enables precise reporting at the appropriate level for each signal type while maintaining overall system compatibility through standardized reporting mechanisms
Solution Approach 2:
The patent applies local quality by allowing different reporting granularities for different power headroom types. Type 4 power headroom for positioning reference signals is reported at reference signal resource set level with high precision, while other types maintain UL carrier level reporting, optimizing accuracy where needed without compromising overall system compatibility
Data Source
AI summary
Embodiments of this application provide a power headroom reporting method, an apparatus, and a system, to resolve a problem that a level mismatch currently exists between calculation of a Type 3 power headroom and reporting of the Type 3 power headroom. The method includes: A terminal device determines a power headroom corresponding to one or more reference signal resource sets in each of one or more cells, where the one or more cells are cells that are among cells participating in positioning of the terminal device and that require the terminal device to report the power headroom; and the terminal device sends power headroom information to a network device, where the power headroom information includes the power headroom corresponding to the one or more reference signal resource sets in each of the one or more cells.