Power Control Precision via Carrier Difference Quantization
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Solution Overview
Problem
The existing dual cell high speed uplink packet access power control methods suffer from continuously accumulating errors, leading to reduced precision in power control as the number of transmissions increases.
Innovation Solution
A method that calculates the total transmit power by determining a quantized value from a configuration parameter table based on the difference between the main carrier and supplementary carrier powers, eliminating the need to reference previous timeslot power and thereby avoiding error accumulation, and ensuring the power difference between carriers is maintained within a set threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the total transmit power is calculated by combining all channels of two carriers and using the total power of the previous timeslot as reference, then the power control process is simple and continuous, but an error from the previous timeslot is introduced each time, causing the error to accumulate continuously and reducing the precision of power control
Solution Approach 1:
The patent segments the power control process into two independent parts: (1) calculating the power difference between main carrier and supplementary carrier channels separately, and (2) using the greater carrier power as reference without accumulating previous timeslot errors. This segmentation eliminates the error accumulation problem while maintaining operational simplicity.
Solution Approach 2:
Instead of using the total power of the previous timeslot as reference (which causes error accumulation), the patent inverts the approach by using the greater carrier power of the current timeslot as the reference. This inversion breaks the error accumulation chain while preserving the continuity of power control.
2Adaptability or versatility
If the power difference between main carrier and supplementary carrier is not controlled, then the power allocation is flexible, but the system cannot maintain stable performance when carriers experience external interference
Solution Approach 1:
The patent implements a feedback mechanism by calculating the power difference between main carrier and supplementary carrier, comparing it with a threshold, and adjusting the power allocation accordingly. When the power difference exceeds the threshold, the system adjusts the power to maintain stable performance under external interference while preserving overall allocation flexibility.
Solution Approach 2:
The patent dynamically changes the power parameter of carriers based on the calculated power difference and threshold comparison. By adjusting the power allocation between main and supplementary carriers according to the power difference parameter, the system maintains stability under interference while preserving flexibility in normal conditions.
Data Source
AI summary
The present invention relates to a power control method, including: obtaining a current main carrier power of a main carrier and a current supplementary carrier power of a supplementary carrier; selecting a reference carrier from the main carrier and the supplementary carrier; calculating a difference between the main carrier power and the supplementary carrier power to obtain a first difference; determining a quantized value corresponding to the first difference by querying a preset configuration parameter table according to the first difference; and determining, according to the power of the reference carrier and the quantized value, a total transmit power for transmitting the main carrier and the supplementary carrier. In the whole process, a power of a previous timeslot does not need to be introduced, therefore, error accumulation can be avoided, thereby reducing a power control error and improving control precision.