C Value Calculation for Uplink Power Control Mode Transitions

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Solution Overview

Problem

Existing methods for calculating the C value for uplink power control in GSM/GPRS/EDGE systems do not effectively account for transitions between different radio resource modes, leading to inaccurate uplink power adjustments in dynamic radio channel environments.

Innovation Solution

A method is introduced to calculate a normalized received signal level value when entering a packet idle mode from a dedicated mode, using specific equations and filtering techniques to determine the C value, which reflects the current radio channel conditions more accurately.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If existing methods for calculating C value are used, then the calculation process is simple, but the accuracy of uplink power control deteriorates when transitioning between different radio resource modes

Engineering Contradiction:
Improveaccuracy of C value calculationVSAvoidcomplexity of power control method
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the C value calculation method adaptive to different radio resource modes. The system dynamically adjusts the calculation approach based on whether the mobile station is in dedicated mode or packet idle mode, allowing the power control mechanism to respond to changing channel conditions rather than using a static calculation method.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter calculation approach by introducing different calculation methods for C value depending on the radio resource mode. Specifically, it modifies how the normalized received signal level is calculated when transitioning from dedicated mode to packet idle mode, using filtering techniques and specific equations tailored to each mode's characteristics.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If the C value is calculated without considering mode transitions, then the calculation is faster, but the reliability of uplink power control deteriorates in dynamic channel conditions

Engineering Contradiction:
Improvereliability of uplink power controlVSAvoidtime for power control adjustment
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by preparing the C value calculation in advance for different radio resource modes. The system pre-establishes the calculation methods and filtering mechanisms so that when mode transitions occur, the power control can be adjusted reliably without delay, as the computational framework is already in place.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by continuously monitoring the radio resource mode and adjusting the C value calculation accordingly. The system uses the calculated C value to control uplink power, and this feedback loop ensures that power control remains reliable even during mode transitions, as the calculation adapts to current channel conditions.

Inventive Principle:
Principle #23Feedback

3Adaptability or versatility

If a unified C value calculation method is used for all modes, then the implementation is easier, but the adaptability to different radio channel conditions deteriorates

Engineering Contradiction:
Improveadaptability to radio channel conditionsVSAvoidcomplexity of calculation method
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the C value calculation method into distinct approaches for different radio resource modes. Instead of using a single unified method, the system segments the calculation logic into dedicated mode-specific calculations and packet idle mode-specific calculations, allowing each segment to be optimized for its specific channel conditions.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent achieves universality by creating a power control framework that can handle multiple radio resource modes through a unified architectural approach. The system uses a common structure with mode-specific parameters and filtering mechanisms, allowing the same basic framework to adapt to different modes without requiring completely separate implementation for each mode.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP2011248B1A method of calculating c value used for uplink power control
Publication Date: 2018.05.30 LG ELECTRONICS INC
  • EP2011248B1 patent drawingFigure 1
  • EP2011248B1 patent drawingFigure 2
  • EP2011248B1 patent drawing

AI summary

Methods of calculating a specified value when entering a second radio resource (RR) mode from a first RR mode is disclosed. More specifically, one of the methods includes calculating a new specified value to be used in the second RR mode using a filter, an iteration index, and a last specified value calculated in the first RR mode if the calculation of the specified value is performed in the first RR mode, and calculating a new specified value to be used in the second RR mode by restarting the filter if the calculation of the specified value is not performed in the first RR mode.