UL TCI State Power Control Association Framework
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Solution Overview
Problem
The existing signaling mechanisms in 5G New Radio (NR) are cumbersome and inflexible for associating uplink (UL) Transmission Configuration Indicator (TCI) states with power control states, particularly in scenarios involving multiple Transmission Points (TRPs and beams, which affects the efficiency of UL beam selection and power control for PUSCH, PUCCH, and SRS transmissions.
Innovation Solution
A framework and signaling method are introduced to efficiently associate UL TCI states with power control states, allowing for explicit or implicit configurations of power control parameters such as P0, α, pathloss RS, and closed-loop indices with UL channels, resources, and resource groups, enabling flexible power control settings for different UL channels and beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing signaling mechanisms are used to associate UL TCI states with power control states, then the system maintains backward compatibility, but the signaling becomes cumbersome and inflexible
Solution Approach 1:
The patent segments the association between UL TCI states and power control states by introducing separate indication mechanisms: one for associating power control state groups with TCI state groups, and another for associating individual power control states with individual TCI states. This segmentation allows flexible configuration while maintaining manageable signaling complexity through modular indication approaches.
Solution Approach 2:
The patent enables dynamic association between UL TCI states and power control states through network-configurable parameters and indication mechanisms. The system can dynamically adjust which power control state group is associated with which TCI state group, allowing adaptive power control configurations based on varying channel conditions and traffic requirements without requiring complex reconfiguration signaling.
2Reliability
If multiple power control states are configured for different UL channels and beams, then transmission reliability improves, but the configuration and management becomes more complex
Solution Approach 1:
The patent creates a universal power control state group structure that can serve multiple UL channels (PUCCH, PUSCH, SRS) and multiple beams simultaneously. Each power control state group contains multiple power control states that can be applied across different channel types and beam configurations, eliminating the need for separate power control configurations for each channel and beam, thus improving reliability while simplifying operation.
Solution Approach 2:
The patent enables preliminary configuration of power control state groups and their associations with TCI state groups before actual UL transmissions occur. The network can pre-configure multiple power control states and establish their relationships with TCI states in advance, so that during UL transmissions, the UE can directly apply the appropriate power control settings based on indicated TCI states without complex real-time configuration, improving both reliability and ease of operation.
3Manufacturing precision
If explicit association signaling is used between UL TCI states and power control states, then configuration precision improves, but signaling overhead increases
Solution Approach 1:
The patent introduces a hierarchical dimension to the association signaling: instead of direct one-to-one indication between UL TCI states and power control states, the system uses intermediate TCI state groups and power control state groups. This dimensional transformation allows precise configuration through group-level associations combined with individual state mappings, achieving configuration precision while reducing signaling overhead by batching similar associations at the group level.
Data Source
AI summary
Systems and methods for associating power control states with Transmission Configuration Indicator (TCI) states are provided. In some embodiments, a method performed by a wireless communication device comprises obtains information that indicates associations between two or more power control states and: (a) two or more TCI states, (b) two or more uplink (UL) channels, (c) two or more UL resources, (d) two or more UL resource sets, (e) two or more UL resource groups, or (f) any combination of two or more of (a)-(e). In this way, some embodiments herein enable efficient signaling to associate the TCI states with the power control states.