SINR Threshold Segmentation for TPC Command Accuracy
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Solution Overview
Problem
The existing LTE system's method for obtaining a Transmission Power Control (TPC) command lacks accuracy, relying on comparisons between current and target Signal to Interference plus Noise Ratio (SINR) values without sufficient flexibility, leading to suboptimal power adjustments.
Innovation Solution
A method and device that preset SINR value thresholds (highest, median, and lowest) and adjust TPC commands based on differences between current and target SINR values, considering Frame Error Rate (FER) and Power Headroom Report (PHR) values to improve the precision and flexibility of power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple comparison method between current SINR value and target SINR value is used to obtain TPC command, then the device complexity is reduced, but the accuracy of the obtained TPC command deteriorates
Solution Approach 1:
The patent divides the SINR threshold into multiple segments (highest threshold HSINR, median threshold MSINR, lowest threshold LSINR) to create multiple comparison levels. This segmentation allows the system to select from multiple TPC command options (0, 1, 2, 3, 4) based on which threshold range the SINR difference falls into, thereby improving TPC command accuracy without requiring overly complex processing machinery
Solution Approach 2:
The patent changes the parameter of SINR threshold from a single value to multiple discrete levels (HSINR, MSINR, LSINR). By introducing these multiple threshold parameters, the system can more precisely characterize different channel conditions and generate more accurate TPC commands while maintaining manageable computational complexity
2Device complexity
If a single SINR threshold is used for TPC command adjustment, then the device complexity is reduced, but the adaptability to different channel conditions deteriorates
Solution Approach 1:
The patent segments the single SINR threshold into three distinct threshold levels (HSINR, MSINR, LSINR) that correspond to different channel condition ranges. This segmentation enables the system to adapt to varying channel conditions by selecting appropriate TPC commands based on which threshold range the current SINR difference falls into, thereby improving versatility without significantly increasing structural complexity
Solution Approach 2:
The patent introduces dynamic adaptability by allowing the system to flexibly select from multiple TPC command options (0-4) based on real-time SINR measurements and threshold comparisons. This dynamic response mechanism enables the power control system to adapt to changing channel conditions while maintaining a relatively simple threshold structure
3Device complexity
If TPC command adjustment is not instantaneous, then the processing complexity is reduced, but the response speed to channel changes deteriorates
Solution Approach 1:
The patent performs preliminary actions by pre-establishing the three SINR threshold levels (HSINR, MSINR, LSINR) and the corresponding TPC command mapping relationships. This preliminary setup allows the system to respond instantaneously to channel changes by simply comparing current SINR differences against the pre-defined thresholds, achieving fast response without complex real-time processing
Solution Approach 2:
By segmenting the response into discrete threshold ranges with predetermined TPC commands, the patent enables rapid decision-making. The segmented threshold structure allows the system to quickly determine which range the current SINR difference falls into and immediately select the corresponding TPC command, thereby achieving instantaneous response with minimal processing complexity
Data Source
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AI summary
The present invention provides a method for obtaining a Transmission Power Control (TPC) command, relating to the field of wireless communications. The method comprises the following steps: presetting a Signal to Interference plus Noise Ratio (SINR) value threshold, wherein the SINR value threshold comprising a highest value HSINR, a median value MSINR, and a lowest value LSINR; comparing a current SINR value with a target SINR value to obtain a difference value ΔSINR; and comparing the ΔSIER with the SINR value threshold, and obtaining a TPC command according to a result of comparison. The present invention also provides a device for obtaining a TPC command. By the method or device in the present invention, the accuracy and instantaneity of obtaining a TPC command are improved.