Dynamic Cyclic Prefix Management for LTE Channel ISI

1Reliability

If cyclic prefix is statically enabled to reduce intersymbol interference, then reliability is improved, but use of energy deteriorates due to power penalties

Engineering Contradiction:

Improveintersymbol interference reductionVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic switching between cyclic prefix enabled and disabled states based on real-time channel conditions. The base station monitors ISI levels and user throughput, then adaptively enables cyclic prefix only when necessary (when ISI exceeds threshold or cell edge users are present), rather than maintaining it statically. This dynamic approach resolves the contradiction by providing reliability improvement only when needed, reducing unnecessary power consumption during clear channel conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameter of cyclic prefix configuration from a fixed static state to a dynamically adjustable state based on channel quality indicators and user distribution. By monitoring ISI levels, user throughput, and cell edge user counts, the system adjusts the cyclic prefix parameter adaptively, enabling it to transition between enabled and disabled states to optimize the trade-off between reliability and energy efficiency.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If cyclic prefix is statically enabled to eliminate distortion, then reliability is improved, but productivity deteriorates due to reduced user throughput

Engineering Contradiction:

Improvedistortion eliminationVSAvoiduser throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements dynamic switching between cyclic prefix enabled and disabled states based on real-time channel conditions. The base station monitors ISI levels and user throughput, then adaptively enables cyclic prefix only when necessary (when ISI exceeds threshold or cell edge users are present), rather than maintaining it statically. This dynamic approach resolves the contradiction by providing reliability improvement only when needed, reducing unnecessary power consumption during clear channel conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameter of cyclic prefix configuration from a fixed static state to a dynamically adjustable state based on channel quality indicators and user distribution. By monitoring ISI levels, user throughput, and cell edge user counts, the system adjusts the cyclic prefix parameter adaptively, enabling it to transition between enabled and disabled states to optimize the trade-off between reliability and energy efficiency.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If cyclic prefix is dynamically disabled to increase bandwidth, then productivity is improved, but reliability deteriorates when ISI levels are high

Engineering Contradiction:

Improveavailable bandwidthVSAvoidsignal quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the base station continuously monitors channel conditions including ISI levels, user throughput, and cell edge user distribution. Based on this feedback, the system makes informed decisions about cyclic prefix configuration. When feedback indicates high ISI levels or presence of cell edge users, the system enables cyclic prefix to maintain reliability. When feedback shows clear conditions, the system disables cyclic prefix to maximize bandwidth utilization. This closed-loop feedback control resolves the contradiction by dynamically adjusting reliability measures based on actual channel conditions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent implements dynamic switching between cyclic prefix enabled and disabled states based on real-time channel conditions. The base station monitors ISI levels and user throughput, then adaptively enables cyclic prefix only when necessary (when ISI exceeds threshold or cell edge users are present), rather than maintaining it statically. This dynamic approach resolves the contradiction by providing reliability improvement only when needed, reducing unnecessary power consumption during clear channel conditions.

Inventive Principle:

Principle #15Dynamics

4Reliability

If cyclic prefix is statically enabled to protect cell edge users, then reliability is improved, but device complexity increases due to continuous monitoring requirements

Engineering Contradiction:

Improvecell edge user protectionVSAvoidmonitoring and switching mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a feedback mechanism where the base station continuously monitors channel conditions including ISI levels, user throughput, and cell edge user distribution. Based on this feedback, the system makes informed decisions about cyclic prefix configuration. When feedback indicates high ISI levels or presence of cell edge users, the system enables cyclic prefix to maintain reliability. When feedback shows clear conditions, the system disables cyclic prefix to maximize bandwidth utilization. This closed-loop feedback control resolves the contradiction by dynamically adjusting reliability measures based on actual channel conditions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes the operational parameter of cyclic prefix configuration from a fixed static state to a dynamically adjustable state based on channel quality indicators and user distribution. By monitoring ISI levels, user throughput, and cell edge user counts, the system adjusts the cyclic prefix parameter adaptively, enabling it to transition between enabled and disabled states to optimize the trade-off between reliability and energy efficiency.

Inventive Principle:

Principle #35Parameter changes

Dynamic Cyclic Prefix Management for LTE Channel ISI

Solution Overview

Problem

Innovation Solution

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

Solution Approach 1:

Solution Approach 2:

2Reliability

Solution Approach 1:

Solution Approach 2:

3Productivity

Solution Approach 1:

Solution Approach 2:

4Reliability

Solution Approach 1:

Solution Approach 2:

Data Source

AI summary