Uplink Beam Power Control Using Unified TCI States
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing power control scheme in wireless communication systems is inefficient due to differing configurations for various channels and reference signals, leading to ambiguity in UE behavior and suboptimal power control operations.
Innovation Solution
Implementing a unified power control method based on a common TCI state for both downlink and uplink transmissions, using a pathloss reference signal set associated with the TCI state, and allowing for beam-specific power control by excluding certain parameters based on signal type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different power control parameter configurations are used for various channels and reference signals, then power control can be optimized for each specific channel/RS type, but the system complexity and configuration overhead increase significantly
Solution Approach 1:
The patent introduces a unified TCI state framework that can be commonly used for both downlink and uplink channels, as well as for different reference signal types. This universal framework allows a single TCI state configuration to serve multiple purposes across different channel and signal types, reducing the need for separate configurations while maintaining optimized power control for each specific case
Solution Approach 2:
The patent merges previously separate power control parameter configurations into a unified structure. By combining the configuration approaches for PUSCH, PUCCH, and SRS into a common TCI state framework with shared parameter sets, the system reduces configuration overhead while preserving the ability to optimize power control for each channel type through selective parameter application
2Reliability
If multiple separate PL RS sets are configured for different channel types, then power control can be precisely controlled per channel, but ambiguity arises in UE behavior regarding which PL RS to track
Solution Approach 1:
The patent introduces a unified TCI state as an intermediary that mediates between the UE and multiple PL RS sets. The TCI state framework provides a common reference point that resolves ambiguity by establishing a clear hierarchical relationship: the TCI state configuration indicates which PL RS set should be tracked, eliminating uncertainty in UE behavior while maintaining the ability to configure multiple PL RS sets for different channel types
3Productivity
If a unified TCI state framework is introduced for common beam indication, then configuration efficiency improves, but the complexity of managing shared parameters across different channel types increases
Solution Approach 1:
The patent segments the unified TCI state framework into distinct parameter categories: common parameters that apply across all channel types and channel-specific parameters that can be selectively applied. This segmentation allows efficient common configuration while managing complexity through structured organization of parameters into hierarchical levels, where higher-level common settings reduce overhead and lower-level specific settings handle channel-type variations
Data Source
AI summary
A method of a user equipment for transmitting an uplink signal in a wireless communication system is disclosed. The method comprises receiving configuration information related to a plurality of transmission configuration indication (TCI) states, and transmitting the uplink signal based on a specific TCI state among the plurality of TCI states. The specific TCI state includes at least one of i) a reference RS used for an uplink transmission or ii) a reference RS commonly used for the uplink transmission and a downlink reception. A transmission power of the uplink signal is determined based on the specific TCI state, and the specific TCI state is related to one or more power control parameters for determining the transmission power of the uplink signal.