DRX Cycle Timing Adjustment for Non-Integer Traffic Periodicity

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Solution Overview

Problem

Current wireless communication systems face inefficiencies in performing wireless signal transmission and reception procedures, particularly in managing discontinuous reception (DRX) cycles, which can lead to inaccuracies and increased power consumption due to fixed integer periodicities that do not align with non-integer traffic requirements.

Innovation Solution

The method involves dynamically adjusting the start position of DRX cycles based on dynamic indication information, using offset and dynamic change control fields in DCI or MAC signaling, allowing for adjustments in the on-duration timing to align with non-integer periodicities of traffic, and enabling the UE to recognize missed indications to prevent inconsistencies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If fixed integer periodicity is used for DRX cycles, then device complexity is reduced, but measurement precision and reliability deteriorate due to misalignment with non-integer traffic requirements

Engineering Contradiction:
ImproveDRX cycle management complexityVSAvoidDRX cycle timing precision
Core Design Contradiction:
Device complexityVSMeasurement precision

Solution Approach 1:

The patent applies dynamics by transitioning from fixed integer periodicity to dynamic fractional periodicity. The DRX cycle duration is no longer constrained to integer values but can be adjusted to match non-integer traffic patterns. This is achieved through fractional DRX cycle duration configuration and dynamic offset adjustment mechanisms, allowing the system to adapt to varying traffic requirements while maintaining manageable complexity through standardized control procedures.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If DRX cycle start position is fixed, then ease of operation is improved, but productivity deteriorates due to inability to align with non-integer periodic traffic patterns

Engineering Contradiction:
ImproveDRX configuration simplicityVSAvoidsignal transmission efficiency
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The patent applies preliminary action through pre-configured offset values and adjustment mechanisms. The system prepares fractional offset parameters in advance that can be applied to align DRX cycles with non-integer periodic traffic patterns. This allows the system to maintain operational simplicity while achieving precise timing alignment, as the complex fractional adjustments are prepared and applied systematically rather than requiring real-time complex calculations.

Inventive Principle:
Principle #10Preliminary action

3Reliability

If DCI includes detailed adjustment information, then measurement precision and reliability are improved, but device complexity increases due to additional fields and processing requirements

Engineering Contradiction:
ImproveDRX cycle synchronization reliabilityVSAvoidDCI structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by introducing detailed adjustment information only where needed - specifically in the offset and adjustment counter fields of the DCI - rather than making the entire DCI structure complex. The fractional offset and adjustment counter are localized to specific fields that provide precise control over DRX cycle timing. This allows high reliability synchronization while keeping the overall DCI structure relatively simple, with complexity concentrated only in the necessary adjustment fields.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS20250024552A1Method and apparatus for transmitting and receiving signal in wireless communication system
Publication Date: 2025.01.16 LG ELECTRONICS INC
  • US20250024552A1 patent drawing
  • US20250024552A1 patent drawing
  • US20250024552A1 patent drawing

AI summary

Disclosed herein is a method of receiving a signal by a user equipment (UE) in a wireless communication system. The method may include receiving a discontinuous reception (DRX) related configuration through higher layer signaling, receiving downlink control information (DCI) in an on-duration of a DRX cycle based on the DRX related configuration, and receiving a downlink signal in an on-duration of a subsequent DRX cycle following the DRX cycle. The on-duration of the subsequent DRX cycle may be configured based on the DCI. The DCI may include at least one of first information for adjusting a start of the on-duration of the subsequent DRX cycle and second information related to an accumulation of the number of times the start of the on-duration of the subsequent DRX cycle has been adjusted.