Uplink Power Control Using Beam State Updates in NR
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Solution Overview
Problem
The challenge in New Radio (NR) technology is the rapid decay of wireless signals at high frequencies, leading to limited coverage, and the need for a flexible beam update mechanism to efficiently manage power control parameters in uplink transmissions.
Innovation Solution
A method and device for determining power control parameters based on beam states, including Quasi Co-Location (QCL) state, Transmission Configuration Indication (TCI) state, spatial relation information, reference signal information, and precoding information, to optimize uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beams are used to transmit signals at high frequency bands, then the coverage of high-frequency signals is improved, but the power control parameter management becomes more complex due to varying beam pairs
Solution Approach 1:
The patent changes the parameter used for power control from traditional cell-based parameters to beam-based parameters (TCI states, spatial relation information, QCL states). This allows the system to adapt power control to the specific beam characteristics and spatial relationships, improving coverage while managing complexity through parameter transformation rather than structural complexity
Solution Approach 2:
The patent creates a universal power control mechanism that works across different beam scenarios by defining a unified framework that handles various beam states (TCI, spatial relation, QCL) through a common power control parameter determination process. This multi-functional approach allows the same mechanism to serve different beam types and scenarios without requiring separate complex control systems for each
2Productivity
If beam pairs are updated flexibly to adapt to time and location changes, then the transmission efficiency is improved, but the power control parameter determination becomes more difficult
Solution Approach 1:
The patent applies preliminary action by pre-configuring beam states (TCI states, spatial relation information, QCL states) and their associated power control parameters before actual transmission. The network side prepares multiple beam states in advance, and the UE can quickly switch between them based on current conditions without complex real-time calculations, thus maintaining high transmission efficiency while simplifying parameter determination
Solution Approach 2:
The patent implements feedback mechanisms where the network side receives beam state information from the UE and adjusts power control parameters accordingly. The UE reports beam state changes, and the network side responds by providing appropriate power control parameters, creating a closed-loop system that adapts to changing conditions while keeping the determination process manageable through iterative adjustment rather than complex upfront calculation
Data Source
AI summary
Provided are a method and device for determining a power control parameter, and storage medium. The method includes: determining a beam state of an uplink transmission; and determining, based on the beam state, the power control parameter of the uplink transmission, where the beam state at least includes one of the following: a QCL state, a TCL state, spatial relation information, reference signal information, spatial filter information or precoding information.