UE Sidelink Feedback Power Control for Carrier Aggregation
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Solution Overview
Problem
Existing wireless communication systems face challenges in seamlessly providing various services due to inefficiencies in uplink transmission power control, particularly in carrier aggregation environments, which affect interference and reception reliability.
Innovation Solution
A method and apparatus for uplink transmission power control in user equipment (UE) using transmission power control parameters transmitted through a downlink control channel, incorporating accumulation and absolute value methods, and dynamic configuration of DCI-based power control parameters to optimize power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink transmission power control is implemented in carrier aggregation environments, then reception reliability is improved, but interference increases due to unoptimized power settings
Solution Approach 1:
The patent dynamically adjusts uplink transmission power parameters based on downlink control channel parameters. The terminal device calculates the difference between downlink reference signal power and downlink control channel power to determine uplink power settings, optimizing the balance between reception reliability and interference reduction through parameter transformation and adaptation.
2Productivity
If transmission power control parameters are dynamically configured, then power settings optimization is achieved, but device complexity increases
Solution Approach 1:
The terminal device autonomously calculates and determines uplink transmission power parameters based on received downlink control channel parameters. The device performs self-adjustment by computing power differences and applying accumulation or absolute value methods without requiring complex external control mechanisms, thereby achieving power optimization while limiting complexity growth.
3Reliability
If accumulation method is used for power control parameters, then reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic selection between accumulation method and absolute value method for power control parameter application. The system adapts the power adjustment strategy based on current transmission conditions, using accumulation for scenarios requiring enhanced reliability and absolute value for scenarios where power conservation is prioritized, thereby dynamically balancing reliability and power consumption.
Data Source
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AI summary
An operating method of a first user equipment (UE) in a wireless communication system according to an embodiment of the disclosure includes receiving downlink control information (DCI) for sidelink communication from a base station, transmitting sidelink data to a second UE, based on the received DCI, receiving feedback information about the sidelink communication through a physical sidelink feedback channel (PSFCH) from the second UE, determining transmission power for transmitting the feedback information to the base station, and transmitting the feedback information through a physical uplink control channel (PUCCH) to the base station, based on the determined transmission power.