Flexible Uplink Power Control for Directional Reference Signals
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Solution Overview
Problem
Existing wireless communications systems face challenges with rigid uplink power control techniques that can lead to inaccuracies and degrade beam management procedures, particularly in directional communications.
Innovation Solution
The implementation of flexible power control parameter configurations, allowing communication devices to determine whether to apply TCI state-dependent or TCI state-independent power control parameters based on the intended use of uplink reference signals, enhancing communication reliability and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If rigid uplink power control techniques are used, then device complexity is reduced, but measurement precision and communication reliability deteriorate
Solution Approach 1:
The patent implements dynamic power control parameter configuration by introducing multiple TCI states with different power control parameter sets. The network can dynamically select and switch between different TCI states and their associated power control parameters based on channel conditions, beam directions, and traffic requirements, transforming the static power control mechanism into a dynamic one that adapts to varying communication scenarios.
Solution Approach 2:
The patent changes the power control parameters by associating different TCI states with different power control parameter sets (including pathloss reference signals, target power values, and power adjustment factors). This allows the system to adjust power control parameters according to different transmission scenarios, beam directions, and channel conditions, thereby improving power control accuracy without significantly increasing device complexity.
2Reliability
If TCI state-dependent power control parameters are used, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the power control parameter management by dividing it into multiple TCI states, where each TCI state is associated with a specific power control parameter set. This segmentation allows the device to manage different power control parameters for different beams, channels, or transmission scenarios independently, improving communication reliability through scenario-specific optimization while organizing complexity into manageable segments.
Solution Approach 2:
The patent creates a universal TCI state framework that serves multiple functions: it identifies beam directions, selects reference signals for channel estimation, and determines power control parameters. By making the TCI state structure multi-functional, the patent reduces the need for separate configuration mechanisms for each function, thereby improving reliability without proportionally increasing device complexity.
3Adaptability or versatility
If multiple power control parameter sets are configured, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent introduces a new dimension of organization by associating power control parameters with TCI states rather than configuring them independently. This dimensional change allows the system to manage multiple power control parameter sets in a structured hierarchy where TCI states serve as the organizing dimension, improving adaptability across different transmission scenarios while reducing the complexity of configuration management through systematic organization.
Data Source
AI summary
Techniques and devices for wireless communications are described. A user equipment (UE) may receive a first message indicating a first configuration for a set of resources for transmitting reference signals. The first configuration may include a first indication of a first set of power control parameters corresponding to the set of resources and a second indication of a set of transmission configuration indicator (TCI) states. The UE may receive a second message indicating a second configuration for the set of TCI states. The second configuration may include a third indication of a second set of power control parameters corresponding to the set of TCI states. The UE may transmit the reference signals in accordance with the first set of power control parameters or the second set of power control parameters.


