Uplink Power Control Loops for Process-Specific SRS Parameters
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Solution Overview
Problem
Existing wireless communication systems face issues with power control loops for sounding reference signals (SRS) being inappropriate for diverse uplink channel conditions, leading to incorrect power adjustments due to common parameter usage across different channels and conditions.
Innovation Solution
A base station determines a set of power control parameters for a user equipment (UE) based on specific SRS processes, such as uplink channel sounding, downlink channel sounding, and cross-link interference, and conveys these parameters through RRC signaling, allowing the UE to identify and apply the correct parameters for each process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If common power control parameters are used for all SRS processes, then device complexity is reduced, but power control precision deteriorates
Solution Approach 1:
The patent segments the power control parameters into different sets corresponding to different SRS processes (e.g., uplink channel sounding, downlink channel sounding, cross-link interference). Each process has its own dedicated power control parameters, allowing process-specific optimization without requiring a completely separate system for each process. This segmentation resolves the contradiction by providing precision where needed while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent implements dynamic selection of power control parameters based on the currently active SRS process. The base station determines which process is active and selects the corresponding parameter set dynamically. This dynamic approach allows the system to adapt to different channel conditions and measurement requirements, achieving high precision when needed while avoiding the complexity of maintaining all parameters simultaneously through selective activation.
2Measurement precision
If process-specific power control parameters are configured for each SRS process, then power control precision is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal framework where a single set of power control parameters can serve multiple SRS processes through configurable associations. The base station can determine which process is active and select the appropriate parameters, allowing one parameter set to potentially serve multiple functions depending on the channel conditions and measurement requirements. This universality reduces the need for completely separate parameter sets for each process.
Solution Approach 2:
The patent employs parameter changes by allowing the base station to dynamically select and switch between different power control parameter sets based on the active SRS process. Instead of maintaining all parameters simultaneously in memory, the system changes the active parameter set based on current operational requirements. This approach achieves process-specific precision while reducing overall complexity through selective parameter activation rather than simultaneous maintenance of all possible parameters.
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AI summary
Methods, systems, and devices for wireless communications are described. A base station may determine a set of power control parameters for a user equipment (UE) to use in different power control loops. The base station may indicate a power control process for the UE to perform in downlink control information. The UE may identify a subset of the power control parameters to use in a power control loop for the indicated process. In some examples, the power control parameters may be for different sounding reference signal processes, such as uplink channel sounding, downlink channel sounding with channel reciprocity, or cross-link interference. In some other examples, the power control parameters may be for power control loops of different uplink channel configuration. The base station may convey the set of power control parameters to the UE by radio resource control signaling.