Independent Closed-Loop Power Control for Multi-Carrier HSUPA
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Solution Overview
Problem
Existing wireless communication systems for High-Speed Uplink Packet Access (HSUPA) face challenges in independent power control across multiple carriers, leading to difficulties in regulating power among carriers and controlling interference, which affects the quality of service.
Innovation Solution
Implementing independent closed-loop power control methods that allow for dynamic ranking and power allocation across multiple carriers based on signal quality and power properties, enabling responsive power up and down commands to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If universal power control is applied to all carriers, then system complexity is reduced, but power regulation among carriers and interference control deteriorate
Solution Approach 1:
The patent divides the power control system into separate independent control loops for each carrier. Each carrier has its own power control mechanism that can independently adjust power levels based on channel conditions, device capabilities, and quality of service requirements. This segmentation enables fine-grained power regulation and interference control while maintaining manageable system complexity through modular design.
Solution Approach 2:
The patent implements carrier-specific power control parameters and adjustment mechanisms tailored to local channel conditions on each carrier. Each carrier can have customized power control behavior, target power levels, and adjustment step sizes based on its specific propagation characteristics, interference environment, and service requirements, rather than applying a uniform control strategy across all carriers.
2Object-generated harmful factors
If independent power control is implemented for each carrier, then power regulation and interference control improve, but system complexity increases
Solution Approach 1:
The patent implements dynamic power control where each carrier's power level is continuously adjusted based on real-time feedback from channel quality indicators, device power headroom reports, and network conditions. The power control parameters such as target power, adjustment steps, and convergence thresholds are dynamically adapted to changing conditions, enabling effective interference control while avoiding the rigidity of static control schemes.
Solution Approach 2:
The patent employs closed-loop feedback mechanisms where each carrier's power control loop receives feedback from channel quality measurements, device power status, and network performance metrics. This feedback drives automatic power adjustments to maintain optimal signal levels and minimize interference, with the feedback loop incorporating hysteresis and rate-limiting to prevent oscillations and reduce control signaling overhead.
3Device complexity
If fixed power allocation is used across carriers, then system simplicity is maintained, but adaptability to changing network conditions deteriorates
Solution Approach 1:
The patent transforms fixed power allocation into dynamic power allocation where each carrier's power level adapts to changing network conditions, device capabilities, and quality of service requirements. The system monitors channel quality, device power headroom, and network load to dynamically adjust power distribution across carriers, enabling flexible response to varying conditions while maintaining manageable complexity through standardized adjustment procedures.
Solution Approach 2:
The patent changes power allocation parameters such as target power levels, power adjustment steps, and carrier priority weights based on network conditions and service requirements. These parameter changes enable the system to adapt power distribution dynamically without requiring complete reconfiguration of the power control mechanism, maintaining simplicity while achieving high adaptability through parameter tuning.
Data Source
AI summary
A method for wireless communications is provided. The method includes applying independent power controls to two or more carriers from a set of high speed packet access signals. The method includes monitoring power across the two or more carriers to determine power levels for the set of high speed packet access signals. The method also includes automatically adjusting at least one of the independent power controls in view of the determined power levels for the set of high speed packet access signals.