5G NR CDRX BWP Switching for Dynamic Traffic Adaptation

Solution Overview

Problem

Existing wireless communication systems, particularly in 5G NR, face challenges in efficiently managing bandwidth parts (BWPs) and monitoring protocols due to static configurations, leading to suboptimal power efficiency and increased latency in adapting to dynamic traffic conditions.

Innovation Solution

Implementing dynamic hierarchical connected mode discontinuous reception (CDRX) configurations and switching active BWPs based on timer activity associated with CDRX communications sessions, coordinating BWP, CORESET, and search space sets to align with traffic dynamics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If static BWP and monitoring configurations are used, then device complexity is reduced, but power efficiency deteriorates due to inability to adapt to dynamic traffic conditions

Engineering Contradiction:

Improvepower efficiencyVSAvoidconfiguration complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent implements dynamic switching between different BWP configurations and monitoring protocols based on traffic conditions. The UE can transition between first and second BWP configurations, and between different monitoring protocols (first and second protocols), allowing the system to adapt to changing traffic patterns rather than using static configurations throughout.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes key parameters including BWP configuration (bandwidth, frequency location), monitoring periodicity, and protocol selection based on traffic conditions. These parameter changes enable the UE to optimize power consumption by using wider bandwidths during high traffic and narrower bandwidths during low traffic periods.

Inventive Principle:

Principle #35Parameter changes

2Loss of time

If static monitoring configurations are used, then device complexity is reduced, but latency increases due to suboptimal adaptation to traffic dynamics

Engineering Contradiction:

ImprovelatencyVSAvoidconfiguration complexity

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent implements dynamic switching between different BWP configurations and monitoring protocols based on traffic conditions. The UE can transition between first and second BWP configurations, and between different monitoring protocols (first and second protocols), allowing the system to adapt to changing traffic patterns rather than using static configurations throughout.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes key parameters including BWP configuration (bandwidth, frequency location), monitoring periodicity, and protocol selection based on traffic conditions. These parameter changes enable the UE to optimize power consumption by using wider bandwidths during high traffic and narrower bandwidths during low traffic periods.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If dynamic BWP switching is implemented, then adaptability to traffic conditions improves, but device complexity increases

Engineering Contradiction:

Improvetraffic adaptation capabilityVSAvoidswitching mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic switching between different BWP configurations and monitoring protocols based on traffic conditions. The UE can transition between first and second BWP configurations, and between different monitoring protocols (first and second protocols), allowing the system to adapt to changing traffic patterns rather than using static configurations throughout.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent divides the bandwidth into multiple BWPs (first BWP configuration and second BWP configuration) with different characteristics. Each BWP is associated with specific monitoring protocols, allowing the system to segment traffic handling into optimized pathways for different traffic conditions.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12388611B2Joint optimization of bandwidth part, search space and connected mode discontinuous reception operation in 5G new radio

Publication Date: 2025.08.12 APPLE INC

AI summary

Apparatuses, systems, and methods for a user equipment device (UE) to perform a method using a status change of a timer associated with a connected mode discontinuous reception (CDRX) communication session with a base station to trigger a switch from using a first bandwidth part (BWP) to a second BWP as the active BWP for the CDRX communication session. The timer may be an on-duration timer, an inactivity timer, or a retransmission timer. The UE may also alter a monitoring schedule of a physical downlink control channel (PDCCH) in response to detecting the status change of the timer. The second BWP may have a wider or narrower bandwidth than the first BWP, depending on the type of timer and the type of status change.