Common-Beam Power Control for 5G NR Uplink Transmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power control mechanisms in wireless communication systems, particularly in 5G New Radio (NR) networks, face challenges in efficiently managing beam management and power control for wireless devices, leading to suboptimal performance and resource inefficiencies.
Innovation Solution
Implementing power control procedures that utilize common beams for both downlink and uplink transmissions, integrating joint and separate TCI states to optimize power control parameters, and employing SRI-based power control to enhance beam management and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power control procedures are used for different beams, then beam-specific optimization is achieved, but device complexity and processing overhead increase
Solution Approach 1:
The patent combines separate power control procedures for different beams into a unified procedure using common TCI states. The base station configures a single set of power control parameters that applies to multiple beams, eliminating the need for separate power control configurations while maintaining beam-specific optimization through the common TCI state framework.
Solution Approach 2:
The patent implements universal power control parameters that serve multiple beams simultaneously. The common TCI states and associated power control parameters are designed to be multi-functional, working across different beam directions and scenarios without requiring separate configurations, thereby reducing device complexity while maintaining effectiveness.
2Device complexity
If joint TCI states are used for multiple beams, then configuration overhead is reduced, but flexibility in beam-specific optimization is limited
Solution Approach 1:
The patent segments the common TCI state configuration into beam-specific components. While the overall power control framework is unified, the common TCI states are configured to represent different beam characteristics, allowing the system to maintain low configuration overhead while preserving beam-specific optimization capabilities through the segmented structure of the common states.
Solution Approach 2:
The patent utilizes parameter changes within the common TCI states to achieve beam-specific optimization. By adjusting parameters such as pathloss reference signals and power control adjustments within the unified common TCI framework, the system maintains flexibility for beam-specific tuning without requiring separate configurations, thus balancing overhead reduction with adaptability.
3Measurement precision
If pathloss reference signals are updated frequently, then power control accuracy is improved, but signaling overhead and latency increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring pathloss reference signals and their associated parameters during the common TCI state configuration phase. This allows the system to have power control accuracy ready in advance without requiring frequent updates during operation, as the preliminary configuration establishes the framework for accurate power control that can adapt to changing conditions without continuous signaling overhead.
Data Source
AI summary
A wireless device may receive downlink control information (DCI) indicating a first TCI state of TCI states. The first TCI state may be associated with a first power control parameter and may be applicable after a first time instance for uplink channel transmissions. The DCI may comprise an uplink grant scheduling a transport block at a second time instance and indicating a second power control parameter. The wireless device may select, from the first power control parameter and the second power control parameter, a power control parameter based on a comparison of the first time instance with the second time instance. The wireless device may determine, based on the selecting, a transmit power. The wireless device may transmit, based on the transmit power and via a physical uplink shared channel, the transport block.