Dynamic SINR Target Adjustment for Uplink Power Control
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Solution Overview
Problem
Current Outer Loop Closed-Loop Power Control mechanisms in wireless communication systems, such as 3GPP-based LTE and 5G NR, do not adequately consider real-time service demands like data rates and data volume in User Equipment (UE) buffers, leading to suboptimal quality of service and interference issues.
Innovation Solution
A dynamic SINRtarget adjustment system that classifies UE data services based on uplink data rates, balancing power distribution for spectral efficiency and bandwidth allocation, using collected parameters like Power Headroom, Buffer Status Report, and average Uplink data rates to customize SINRtargets for each UE, ensuring maximum throughput while minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high SINRtarget is set to increase UE's uplink SINR, then spectral efficiency is improved, but power headroom for bandwidth allocation is reduced
Solution Approach 1:
The patent implements dynamic adjustment of SINRtarget based on real-time service demands. The Outer Loop CLPC mechanism continuously monitors service requirements and adapts SINRtarget values, transitioning from static to dynamic control to optimize the trade-off between spectral efficiency and power consumption.
Solution Approach 2:
The patent changes the SINRtarget parameter dynamically according to service demands. By adjusting this key parameter based on buffer status and data rate requirements, the system optimizes the balance between achieving high spectral efficiency and conserving power headroom for bandwidth allocation.
2Reliability
If continuous TPCs are sent to reach high SINRtarget, then uplink SINR is improved, but interference to adjacent cells increases
Solution Approach 1:
The patent applies different SINRtarget values to different UEs based on their local service demands and channel conditions. By customizing the target SINR for each UE rather than using a uniform high target for all, the system maintains reliable decoding where needed while reducing unnecessary power transmission and interference in other cases.
3Device complexity
If static OLPC parameters are used, then system complexity is reduced, but adaptability to fast radio condition changes is worsened
Solution Approach 1:
The patent introduces a feedback mechanism in the Outer Loop CLPC that monitors service demands, buffer status, and channel conditions. This feedback loop enables the system to adapt OLPC parameters dynamically while maintaining a relatively simple overall structure, resolving the contradiction between complexity and adaptability.
Data Source
AI summary
A method for uplink closed loop power control in advanced wireless systems which adaptively adjusts target signal-to-interference noise ratio (SINRtarget) in order to achieve the best uplink throughput of data services is disclosed. To derive the desired target SINR, the system collects and evaluates various uplink parameters as inputs: real-time signal-to-interference noise ratio of data physical channel, terminal power headroom, and terminal buffer data status and data service requirements.