DRX Parameter Synchronization for Wireless Component Carriers

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently managing power consumption through discontinuous reception (DRX) across multiple component carriers, particularly when using relays, as existing methods struggle to synchronize and optimize DRX cycles and on-durations across different carriers, leading to suboptimal power saving and service reliability.

Innovation Solution

The system and method involve generating and transmitting DRX-related control and system information between a base station and a user equipment, with a relay adjusting DRX parameters for additional component carriers based on channel state and link performance, ensuring synchronized DRX operations across carriers to optimize power saving and service efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If DRX parameters are independently set for each component carrier, then power saving optimization can be achieved for each carrier, but system complexity increases due to multiple DRX cycles and synchronization requirements

Engineering Contradiction:

Improvepower consumptionVSAvoidDRX parameter management complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent divides the DRX parameter management into separate components: a first DRX cycle for first component carriers and a second DRX cycle for second component carriers. This segmentation allows independent optimization of power saving for each carrier type while maintaining manageable complexity through structured parameter organization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic DRX parameter adjustment where the eNodeB can modify DRX cycles based on channel conditions and link performance. The system transitions between different DRX modes (first and second DRX cycles) dynamically, allowing optimization of power consumption without fixed complexity.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If DRX cycles are synchronized across component carriers, then power saving efficiency improves, but adaptability to varying channel conditions and service requirements decreases

Engineering Contradiction:

Improvepower saving efficiencyVSAvoidadaptability to channel conditions

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The patent applies different DRX cycles to different component carriers based on their specific channel conditions and service requirements. First component carriers use a first DRX cycle optimized for their conditions, while second component carriers use a second DRX cycle, allowing local optimization without forcing global synchronization.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system dynamically changes DRX parameters (cycle length, on-duration) based on measured channel conditions and link performance. The eNodeB adjusts parameters in real-time, transitioning between different DRX configurations to balance power saving with adaptability to varying conditions.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If relay nodes adjust DRX parameters based on link performance, then service reliability improves, but information transmission overhead increases due to additional control signaling

Engineering Contradiction:

Improveservice reliabilityVSAvoidcontrol information overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent implements feedback mechanisms where the eNodeB receives link performance information from relay nodes and adjusts DRX parameters accordingly. This feedback loop enables reliability optimization by adapting DRX cycles to actual channel conditions, with the feedback itself being efficiently managed through existing control channels.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary DRX parameter configuration during connection setup and handover procedures. By pre-configuring appropriate DRX cycles based on anticipated channel conditions, the system reduces the need for continuous control signaling during normal operation, thereby reducing overhead while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8837340B2Method and system for transmitting/receiving data in a wireless communication system

Publication Date: 2014.09.16 PANTECH CORP

AI summary

The present specification relates to a wireless communication system, and more particularly, discloses a method and system for discontinuous reception for data transmission/reception in a wireless communication system. The present specification discloses a scheme in which a terminal checks a parameter for controlling the discontinuous reception (DRX) of a second component carrier, said parameter being different from the parameter for controlling the discontinuous reception (DRX) of a first component carrier used by a base station, and receives data through the discontinuous reception of the first component carrier and of the second component carrier.