Flexible DRX Configuration for XR Traffic Latency
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Solution Overview
Problem
Current Discontinuous Reception (DRX) mechanisms in wireless communication systems are not adaptable to the high-rate and low-latency requirements of Extended Reality (XR) traffic, leading to inefficient power conservation and performance issues due to mismatched transmission periodicity, particularly for XR services that demand precise timing, such as VR and AR.
Innovation Solution
A method and device for configuring DRX in wireless communication systems that involve receiving signaling for configuring a DRX cycle, listening over the Physical Downlink Control Channel (PDCCH) within active time, and performing radio link quality evaluations within a customized evaluation cycle to determine if the link quality is worse than a threshold, allowing for flexible and non-integral periodicity to support XR traffic, thereby optimizing power conservation and compatibility with existing protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional DRX mechanism is used with fixed cycle (e.g., 50ms), then power conservation is achieved, but it cannot adapt to XR traffic requirements with non-integral periodicity (e.g., 16.67ms), leading to increased latency and poor power management
Solution Approach 1:
The patent applies dynamics by transforming the fixed DRX cycle into a flexible configuration that can adapt to different traffic types. The system allows configuration of multiple DRX cycles with different periods (e.g., 50ms for general traffic, 16.67ms for XR traffic) and enables dynamic selection based on traffic characteristics. This resolves the contradiction by making the DRX mechanism versatile enough to handle both power conservation requirements and XR-specific timing requirements without fixed limitations.
Solution Approach 2:
The patent changes the parameter of DRX cycle period from a fixed value to configurable values that can be adjusted according to traffic type. By allowing the system to change the DRX period parameter (e.g., from 50ms to 16.67ms) based on the detected traffic characteristics, the system achieves both power conservation and adaptability to XR traffic requirements, eliminating the time gap issue.
2Use of energy by stationary object
If DRX cycle is extended to 50ms for power saving, then power consumption is reduced, but measurement performance is affected because the evaluation cycle cannot properly accommodate the extended cycle without additional PDCCH listening time
Solution Approach 1:
The patent segments the DRX cycle into distinct functional periods: a first period for PDCCH listening (control channel monitoring) and a second period for data transmission. This segmentation allows the system to maintain reliable link monitoring during the PDCCH listening period while extending the overall DRX cycle for power saving. The measurement evaluation cycle is aligned with the PDCCH listening period, ensuring that link monitoring performance is not compromised by the extended DRX cycle.
Solution Approach 2:
The patent applies preliminary action by performing PDCCH listening and measurement evaluation during the first period before the main data transmission occurs in the second period. This preliminary action ensures that link monitoring and signal measurements are completed in advance, maintaining reliable performance while the extended DRX cycle enables power conservation during the second period.
3Adaptability or versatility
If multiple DRX configurations are added to support different traffic types, then adaptability to diverse traffic improves, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a unified DRX configuration framework that can handle multiple traffic types through a single set of mechanisms. Instead of requiring separate dedicated DRX configurations for each traffic type, the system uses a universal approach where the same DRX framework supports both power conservation modes and XR traffic modes by configuring different cycle parameters. This reduces device complexity while maintaining versatility.
Solution Approach 2:
The patent uses dynamics to manage complexity by implementing a flexible selection mechanism that automatically chooses the appropriate DRX configuration based on traffic detection. Rather than maintaining multiple static, complex configurations, the system dynamically adapts the DRX parameters (period, offset, timing) according to the detected traffic type, simplifying the overall device complexity while preserving support for diverse traffic types.
Data Source
AI summary
The present application discloses a method and a device for wireless communications, including: receiving a first signaling, the first signaling used for configuring DRX of a first cell group; the DRX of the first cell group configured by the first signaling being for a first MAC entity; and listening over a PDCCH within active time of any DRX group corresponding to the first cell group; and performing a first radio link quality evaluation of a first reference signal resource set within a first evaluation cycle to determine whether a result of the first radio link quality evaluation is worse than a first threshold. Through the first signaling, the present application not only can support more flexible DRX but also ensures the performance of link monitoring.