Configured Grant Uplink Allocation with Adaptive LA and PC Targets
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently adapting transmission parameters for Configured Grant (CG) transmissions, particularly in terms of power control and link adaptation, leading to inefficiencies in resource usage and interference issues.
Innovation Solution
A method and network node that dynamically adjust power control (PC) and link adaptation (LA) targets based on transmission quality feedback, using a combined outer loop power control and link adaptation scheme to optimize CG transmissions by increasing or decreasing LA and PC targets based on transmission benefit thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed power control and link adaptation targets are used for CG transmissions, then device complexity is reduced and ease of operation is improved, but spectrum efficiency is suboptimal and inter-cell interference increases
Solution Approach 1:
The patent implements dynamic adjustment of link adaptation (LA) and power control (PC) targets based on transmission quality feedback. The network node receives feedback indicating transmission quality and dynamically updates LA and PC targets when quality improves beyond a threshold, allowing the system to adapt to changing channel conditions and maximize spectrum efficiency while maintaining manageable complexity through automated control
Solution Approach 2:
The patent changes the parameters of LA and PC targets based on transmission quality feedback. When feedback indicates improved transmission quality, the network node increases LA and PC targets to optimize resource utilization and spectrum efficiency. This parameter adaptation allows the system to respond to channel conditions without requiring complex real-time optimization algorithms
2Ease of operation
If fixed power control and link adaptation targets are used for CG transmissions, then ease of operation is improved, but inter-cell interference increases
Solution Approach 1:
The patent introduces a feedback mechanism where the network node receives feedback from the UE indicating transmission quality. Based on this feedback, the network node dynamically adjusts LA and PC targets. This feedback loop enables the system to automatically respond to changing conditions and reduce inter-cell interference by adapting power levels and resource allocation without requiring complex manual intervention
Solution Approach 2:
The system transitions from static to dynamic control of transmission parameters. The LA and PC targets are adjusted dynamically based on transmission quality feedback, allowing the system to adapt to varying channel conditions and reduce interference to other cells while maintaining ease of operation through automated control mechanisms
3Productivity
If higher LA target values are used for CG transmissions, then spectrum efficiency is improved, but device energy consumption increases
Solution Approach 1:
The patent uses transmission quality feedback to determine when to adjust LA and PC targets. By only increasing targets when feedback confirms improved transmission quality, the system avoids unnecessary increases in UE transmit power and energy consumption. This feedback-driven approach ensures that higher LA targets are only applied when channel conditions actually support them, optimizing the trade-off between spectrum efficiency and energy usage
Solution Approach 2:
The patent implements conditional parameter changes where LA and PC targets are only increased when transmission quality feedback indicates improved channel conditions. This prevents unnecessary energy consumption by ensuring that higher power levels and more aggressive modulation schemes are only used when the channel can actually support them, thereby improving spectrum efficiency without wasteful energy expenditure
Data Source
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AI summary
Disclosed is a method and a network node (130) of a wireless communication network (100) for controlling transmission parameters of uplink, UL, configured grant, CG, transmissions sent by a User Equipment, UE (140). The method comprises determining a respective transmission quality value for CG transmissions received from the UE (140) over time, the CG transmissions being sent with a power based on a power control, PC, target and a link adaptation, LA, target. When a distribution value of the transmission quality values is higher than a transmission quality target, a transmission benefit of increasing the LA target with a certain value is estimated. When the transmission benefit is higher than a threshold, the LA target is increased with the certain value, a new allocation of CG transmission resources is triggered based on the increased LA target, and information on the new allocation of CG transmission resources are sent to the UE (140).