5G NR Uplink Power Control for Angularly Separated Beams
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Solution Overview
Problem
Existing uplink power control methods in 5G New Radio (NR) systems face challenges in efficiently managing transmission power for multiple beams with varying angular separations and numerologies, leading to potential interference and power limitations.
Innovation Solution
A wireless transmit/receive unit (WTRU) determines uplink transmission power based on angular separation thresholds and priority orders for beams, employing power scaling and allocation to ensure compliance with maximum power limits and interference management, considering numerology, beamforming, and multiplexed transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate maximum power level parameters are used for each beam, then transmission power can be optimized for each beam direction, but device complexity increases due to multiple power control parameters
Solution Approach 1:
The patent applies local quality by assigning different maximum power level parameters to different beam directions based on their angular separation. When beams are separated by more than a threshold angle, each beam receives its own dedicated maximum power parameter, allowing optimized power control for each spatial direction while managing interference between beams.
2Reliability
If power scaling is applied to multiple beams, then maximum power limits are complied with, but transmission efficiency may be reduced due to power reduction
Solution Approach 1:
The patent implements dynamic power scaling based on real-time angular separation measurements between beams. The system dynamically adjusts whether separate or shared maximum power parameters are applied depending on the current spatial relationship between beams, and dynamically scales power when necessary to comply with maximum power limits while minimizing transmission efficiency loss.
3Device complexity
If angular separation thresholds are used to determine power parameters, then power control is simplified, but measurement precision requirements increase
Solution Approach 1:
The patent applies parameter changes by using angular separation thresholds to switch between different power control modes (separate vs. shared maximum power parameters). This threshold-based approach simplifies the power control mechanism while requiring precise angular separation measurements to accurately determine which mode to activate.
Data Source
AI summary
Techniques for uplink power control (e.g., for New Radio (NR)) are disclosed. A wireless transmit/receive unit (WTRU) may determine that the WTRU is to perform a first and a second transmissions using a first and a second transmission beams. The WTRU may determine an uplink transmission power for one or more of the first or second transmissions. For example, if the angular separation of the first and the second transmission beams is greater than a first separation threshold, the WTRU may determine the uplink transmission power having a first maximum power level parameter and a second maximum power level parameter. If the angular separation of the first and the second transmission beams is less than a second separation threshold, the WTRU determine the uplink transmission power having a shared maximum power level parameter. The WTRU may transmit the first and second transmissions using the first and second transmission beams, respectively.