NR Uplink Power Control Sets for Adaptive PUSCH Transmission
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Solution Overview
Problem
In New Radio (NR) systems, the existing power control mechanisms for uplink transmissions, such as Physical Uplink Shared Channel (PUSCH) and Sounding Reference Signal (SRS), are inadequate due to the support of multiple TRPs, beamforming, and diverse numerologies, leading to inefficiencies in power management.
Innovation Solution
A method for uplink transmission by a UE that involves obtaining and associating multiple power control sets with operational properties such as resource assignment type, numerology, scheduling time unit, DCI-related information, and DL RS type for pathloss estimation, allowing the UE to select the appropriate power control set based on current operational conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single power control mechanism is used for all uplink transmissions, then the system is simple to implement, but it cannot accommodate multiple TRPs, beamforming, and diverse numerologies leading to inadequate power control
Solution Approach 1:
The patent segments the power control mechanism by introducing multiple power control sets (first power control set and second power control set) with different parameters. Each set is associated with specific operational properties such as resource assignment type, numerology configuration, and scheduling time unit length. This segmentation allows the system to handle diverse transmission scenarios (multiple TRPs, beamforming, different numerologies) without requiring a completely new power control mechanism, thus improving adaptability while controlling complexity.
Solution Approach 2:
The patent implements dynamic power control by enabling the UE to select between different power control sets based on current operational conditions. The power control parameters are no longer static but dynamically adjusted according to the active operational property (e.g., switching between grant-based and grant-free transmissions, different numerologies). This dynamic approach allows the system to adapt to changing transmission requirements while maintaining a manageable structure through predefined power control sets.
2Measurement precision
If multiple power control sets are introduced for different operational properties, then power control accuracy is improved, but the complexity of power control management increases
Solution Approach 1:
The patent applies local quality by associating specific power control parameters with specific operational properties. Each power control set is tailored to its associated operational context (e.g., first power control set for grant-based transmissions, second power control set for grant-free transmissions). This localized optimization ensures that each power control set is precisely suited for its intended use case, improving power control accuracy for each specific scenario while maintaining overall system manageability through clear associations.
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously select the appropriate power control set based on the current operational property without requiring complex network coordination. The UE monitors its operational state (resource assignment type, numerology configuration, scheduling time unit) and automatically applies the corresponding power control set. This self-service mechanism reduces the signaling overhead and management complexity that would otherwise be required for the network to explicitly configure and manage multiple power control sets.
3Productivity
If power control parameters are dynamically adjusted based on operational properties, then transmission efficiency is improved, but the processing overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple power control sets with all necessary parameters before transmission occurs. The power control parameters for each set are determined in advance based on potential operational scenarios (different resource assignment types, numerologies, scheduling time units). When a transmission occurs, the UE simply selects the pre-configured set that matches the current operational property, avoiding the need for real-time calculation and adjustment of power parameters. This preliminary preparation significantly reduces processing time while maintaining high transmission efficiency.
Data Source
AI summary
A method for uplink transmission by a UE includes obtaining information regarding a plurality of power control sets each having a plurality of power control parameters, wherein a value of at least one parameter in a first power control set is different from a value of the at least one parameter in a second power control set; obtaining information associating at least one of the power control sets with at least one operational property of the UE; and when at least one of the operational properties is in effect on the UE, transmitting a PUSCH using the parameters of the power control set associated with the at least one operational property in effect.