Single C-DRX Configuration for Multi-Periodicity Traffic
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Solution Overview
Problem
Existing Connected Mode Discontinuous Reception (C-DRX) operations in cellular networks face challenges in handling multiple services with different periodicities, leading to delays and QoS degradation, especially for delay-sensitive traffic like Extended Reality (XR) services.
Innovation Solution
A single C-DRX configuration is implemented with varying DRX timing parameters across cycles, tailored to the periodicities of multiple services, allowing for a repeating sequence of communication windows that adapt to the different traffic patterns without requiring multiple active DRX configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single C-DRX configuration with fixed timing parameters is used, then the UE can operate in power-efficient sleep mode with simple configuration, but delay-sensitive traffic with different periodicities cannot be delivered without buffering delays
Solution Approach 1:
The C-DRX configuration dynamically adapts its timing parameters based on the periodicity of active traffic flows. The network determines appropriate drx-SlotOffset and drx-onDurationTimer values that match the traffic pattern, allowing the UE to switch between static and dynamic operation modes. This enables the system to optimize for power efficiency during low-activity periods while ensuring timely delivery during high-activity periods with multiple services.
Solution Approach 2:
The invention changes the C-DRX timing parameters (drx-SlotOffset, drx-onDurationTimer, drx-LongCycle, drx-ShortCycle) based on the periodicity characteristics of active traffic flows. By adjusting these parameters to match the traffic pattern, the system achieves both power efficiency and timely delivery without requiring multiple concurrent C-DRX configurations.
2Reliability
If multiple C-DRX configurations are maintained simultaneously for different services, then each service can be delivered without delay, but processing overhead and system complexity increase significantly
Solution Approach 1:
A single C-DRX configuration is designed to serve multiple traffic flows with different periodicities. The network determines timing parameters that accommodate the periodicity requirements of multiple services, allowing one universal C-DRX configuration to replace what would otherwise require multiple service-specific configurations. This reduces UE complexity while maintaining QoS for multiple services.
Solution Approach 2:
Multiple service-specific C-DRX configurations are merged into a single unified C-DRX configuration. The network analyzes the periodicity requirements of multiple services and determines timing parameters that satisfy all of them simultaneously, combining what would be separate configurations into one that serves all services.
3Productivity
If C-DRX timing parameters are optimized for one service periodicity, then that service is delivered efficiently, but other services with different periodicities experience buffering delays
Solution Approach 1:
The C-DRX configuration transitions from a static, service-specific setting to a dynamic, multi-service configuration. The network monitors active traffic flows and their periodicities, then adjusts the C-DRX timing parameters accordingly. This dynamic adaptation allows the single C-DRX configuration to efficiently support multiple services with varying periodicities without causing buffering delays.
Solution Approach 2:
The invention changes the approach from fixing C-DRX parameters for a single service to adjusting parameters based on the aggregate periodicity characteristics of multiple services. The network determines timing parameters that accommodate the periodicity requirements of all active services, enabling efficient delivery across different service types.
Data Source
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AI summary
Connected Mode Discontinuous Reception (C-DRX) operation is provided in respect of a User Equipment (UE) in a cellular network for handling first traffic having a first periodicity and second traffic having a second, longer periodicity. A single C-DRX configuration is operated between the network and UE, the single C-DRX configuration having timing parameters defining a repeating sequence of communication windows, at least one of the timing parameters varying between successive communication windows of the repeating sequence based on both the first and second periodicities.