Multi-Panel Uplink Power Reporting With Differential Control Parameters
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Solution Overview
Problem
There is a need for improved power control operations in wireless communication systems, particularly in multi-panel uplink transmissions, to enhance spectral efficiency and reduce interference in emerging telecommunication standards like 5G NR.
Innovation Solution
A method for reporting differential transmit power control parameters between multiple panels of a user equipment (UE) to a base station, allowing for precise power control operations, including the calculation and reporting of power headroom and maximum transmit power differences between panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate power control parameters are reported for each panel, then power control accuracy is improved, but signaling overhead and message size increase
Solution Approach 1:
The patent combines multiple power control parameters (first power parameter for first panel, second power parameter for second panel, and third power parameter for third panel) into a single reporting message transmitted to the base station. This merging approach maintains comprehensive power control information while reducing the number of separate signaling transactions, thereby balancing accuracy requirements with overhead reduction.
Solution Approach 2:
The reporting message is designed to serve multiple functions simultaneously: it conveys power control parameters for multiple panels, enables the base station to calculate power headroom for each panel, and supports differential power control operations. This multi-functionality reduces the need for separate dedicated messages for each panel, thereby reducing overall signaling overhead while maintaining comprehensive power control capability.
2Loss of information
If differential power control parameters are used, then signaling overhead is reduced, but calculation complexity increases
Solution Approach 1:
The base station is pre-configured with the capability to calculate power headroom for multiple panels using the received power control parameters. The system performs preliminary setup of power control parameter structures and calculation algorithms, so that during actual operation, the base station can efficiently compute power headroom values without real-time complexity burdens. This preliminary preparation reduces operational calculation complexity while maintaining differential power control benefits.
3Productivity
If panel-specific power control is implemented, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the power control mechanism into panel-specific components, where each panel (first panel, second panel, third panel) has its own power control parameter and power headroom calculation. This segmentation enables independent optimization of each panel's power usage, improving spectral efficiency by allowing precise power allocation per panel while maintaining manageable complexity through modular parameter structure.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for differential power parameter reporting in multi-panel uplink transmission. A method that may be performed by a user equipment (UE) includes determining a first transmit power control parameter associated with a first panel of the UE and a differential transmit power control parameter to be used to indicate a second transmit power control parameter associated with a second panel of the UE, the differential transmit power control parameter indicating a difference between the first transmit power control parameter and the second transmit power control parameter generating a reporting message indicating the first transmit power control parameter and the differential transmit power control parameter; and transmitting the reporting message to a base station.