Uplink Power Control in 5G Beamforming Systems
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Solution Overview
Problem
Current 5G communication systems lack an effective method for uplink power control of terminals during beam changes in beamforming systems, which affects transmission performance and power consumption.
Innovation Solution
A method and apparatus that enable terminals and base stations to control uplink transmission power by determining the appropriate power for Sounding Reference Signals (SRS) based on pathloss and beam compensation values, allowing for optimal SRS transmission over selected beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to increase transmission distance in mmWave band, then transmission performance is improved, but uplink power control becomes complex and difficult to manage during beam changes
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power based on beam-specific pathloss values. When beam changes occur, the system updates the pathloss parameter for each beam and accordingly modifies the transmission power level, allowing adaptive power control that responds to changing beam conditions without requiring complex manual configuration
Solution Approach 2:
The patent implements feedback mechanisms where the terminal measures pathloss for each beam and reports this information to the base station. The base station then uses this feedback to determine appropriate transmission power levels for SRS signals, creating a closed-loop control system that automatically adjusts power based on actual beam conditions
2Reliability
If transmission power is increased to maintain signal quality during beam changes, then uplink performance is maintained, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making transmission power adaptive rather than static. The system continuously monitors beam conditions and dynamically adjusts power levels - using higher power only when necessary for specific beams with higher pathloss, and reducing power for beams with better conditions, thereby maintaining uplink performance while minimizing overall power consumption
Solution Approach 2:
The patent implements local quality by applying different transmission power levels to different beams based on their individual pathloss characteristics. Instead of using a uniform high power level for all beams, the system tailors the power level to each specific beam's requirements, ensuring adequate performance for each direction while avoiding unnecessary power consumption
3Measurement precision
If beam-specific pathloss calculation is implemented for each beam pair, then transmission accuracy is improved, but calculation complexity and processing overhead increase
Solution Approach 1:
The patent applies segmentation by dividing the pathloss calculation into beam-specific segments. Instead of calculating a single overall pathloss value, the system calculates separate pathloss values for each beam pair (terminal transmission beam and base station reception beam), allowing precise measurement for each directional link while organizing the calculations in a structured, manageable way
Data Source
AI summary
The present disclosure relates to a communication technique for convergence of a 5G communication system for supporting a higher data transmission rate beyond a 4G system with an IoT technology, and a system therefor. The present disclosure may be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related service, etc.) on the basis of a 5G communication technology and an IoT-related technology. The present invention relates to a method for controlling power of a terminal in a beamforming system and, specifically, provides a method for supporting control of uplink power of a terminal according to a beam change.