Adaptive Transmit Power Control Step Sizes
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively managing transmit power control, particularly with fixed step sizes and rates, which can lead to inefficiencies in adapting to changing communication conditions, resulting in suboptimal link efficiency and power management.
Innovation Solution
The implementation of dynamically adaptive step sizes for transmit power control based on identified trends and multiple interference estimates, allowing for more granular and timely adjustments in transmit power, even at reduced TPC rates, using techniques that map different step sizes to TPC commands without altering existing algorithms or specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed step sizes and rates are used for transmit power control, then the system implementation is simple and compliant with existing specifications, but the adaptability to changing communication conditions deteriorates
Solution Approach 1:
The patent applies dynamics by making the TPC step size adaptive rather than fixed. The step size dynamically adjusts based on detected trends in TPC commands (e.g., consecutive up or down commands), allowing the system to respond more effectively to changing communication conditions while maintaining compliance with existing specifications through flexible interpretation of step size mapping.
Solution Approach 2:
The patent changes the parameter of step size from a fixed value to a variable value that depends on trend detection. By modifying the step size parameter based on the sequence of TPC commands received, the system achieves better adaptability without fundamentally altering the TPC mechanism structure.
2Speed
If lower TPC rates are used, then the system can maintain simpler implementation and reduced overhead, but the speed of power adjustments deteriorates
Solution Approach 1:
The patent makes the TPC step size dynamic to compensate for lower TPC rates. When the TPC rate is reduced, the system can still achieve effective power control by adapting the step size based on trend detection, allowing larger adjustments when needed while maintaining the lower update rate.
Solution Approach 2:
The patent uses feedback from detecting TPC command trends to adjust the step size. By monitoring the sequence of TPC commands and identifying patterns (such as multiple consecutive up or down commands), the system feeds this information back to modify the step size, thereby maintaining effective control even at reduced rates.
3Measurement precision
If multiple interference estimates are used for transmit power control, then the precision of power control improves, but the processing time and complexity increase
Solution Approach 1:
The patent segments the TPC adjustment process by using multiple interference estimates at different sub-slot intervals. Instead of processing all interference measurements simultaneously, the system divides the slot into sub-slots and processes interference estimates separately, which improves precision while managing processing time through structured segmentation.
Solution Approach 2:
The patent performs preliminary actions by calculating multiple interference estimates in advance at sub-slot intervals. By preparing these estimates before the final TPC decision is made, the system can make more precise power control adjustments without excessive processing delays, as the heavy computation is distributed across multiple smaller preliminary steps.
Data Source
AI summary
Methods, systems, and devices are provided that may address problems pertaining to effective transmit power control of a communications device operating in a wireless communications system. Some embodiments utilize mechanisms or techniques with dynamically adaptive steps sizes for transmit power control based on one or more trends. Some of these techniques may identify a trend in the transmit power control (TPC) commands and may adapt a TPC step size as a result. Other techniques may be utilized in which transmit power control is based on multiple interference estimates in a frame slot. Having multiple interference estimates at sub-slot intervals may provide additional transmit power control by allowing more transmit power adjustments, or more appropriate adjustments, for each slot. Metric calculations may be performed on one or more techniques to determine appropriate TPC operations.