Uplink Power Control Using Beam-Specific UE Parameter Selection
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Solution Overview
Problem
In 5G NR systems, the base station cannot flexibly adjust power control parameters for uplink transmission due to the UE's inability to distinguish between multiple beams, leading to inefficient power control.
Innovation Solution
The UE autonomously determines power control parameters based on beam-specific measurements and reports changes to the base station, allowing flexible adjustment of power control according to beam changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station supports multiple beams for uplink transmission, then the coverage and signal quality are improved, but the base station cannot flexibly adjust power control parameters because the UE does not distinguish between different beams
Solution Approach 1:
The patent segments the beam configuration by introducing beamIndex to distinguish different beams. The UE is configured with multiple beamIndex values, each associated with specific power control parameters. This segmentation allows the UE to identify which beam is currently used and select the corresponding power control parameters, enabling flexible power control adjustment based on beam changes while maintaining multiple beam support for improved signal quality.
2Device complexity
If the UE does not distinguish between multiple beams, then the device complexity is reduced, but the power control efficiency deteriorates when scheduling uplink transmission
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with multiple beamIndex values and their corresponding power control parameters before actual uplink transmission occurs. The base station provides this configuration in advance, allowing the UE to automatically select the appropriate power control parameters based on the current beam without requiring complex real-time beam identification or processing, thus maintaining low device complexity while achieving efficient power control.
3Ease of operation
If power control parameters are not adjusted according to beam changes, then the system operation is simplified, but energy efficiency deteriorates due to excess power usage
Solution Approach 1:
The patent implements feedback by having the UE report the used beamIndex to the base station, which then provides power control parameters accordingly. The UE autonomously determines which beam is currently used and selects the corresponding power control parameters based on feedback information about beam changes. This feedback mechanism enables automatic power adjustment to match the actual beam configuration, preventing excess power usage while keeping the operation simple through automated parameter selection.
Data Source
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AI summary
Provided are a power control method and apparatus, and an uplink transmission method and apparatus. The power control method comprises: when a first condition is satisfied, a first communication node determining a power control parameter of uplink transmission in a predetermined manner, or, the first communication node autonomously determining the power control parameter of the uplink transmission.