Dynamic DRX Configuration for XR Traffic in Wireless Systems
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Solution Overview
Problem
Current DRX configurations in wireless communication systems are inadequate for supporting Extended Reality (XR) services, particularly due to non-integer XR traffic periodicity, variable data rates, and quasi-periodic traffic patterns, which lead to inefficient power consumption and poor user experience.
Innovation Solution
The method involves configuring User Equipment (UE) with dynamic DRX settings, allowing for adjustable DRX parameters such as drx-onDurationTimer, drx-SlotOffset, drx-ShortCycle, and drx-LongCycle, based on signaling indications to align with XR traffic patterns, reducing PDCCH monitoring and enhancing power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional DRX configurations are used, then power consumption is reduced through periodic reception, but XR service quality deteriorates due to non-integer traffic periodicity and variable data rates
Solution Approach 1:
The patent implements dynamic DRX configuration where the network can adjust DRX parameters (drx-onDurationTimer, drx-SlotOffset, drx-ShortCycle, drx-LongCycle) based on XR traffic conditions. The system transitions from static to dynamic DRX settings, allowing the UE to adapt its reception pattern to match variable XR traffic patterns while maintaining power efficiency.
Solution Approach 2:
The patent changes DRX parameters dynamically to match XR traffic characteristics. Multiple DRX configurations are maintained with different parameter sets, and the network selects appropriate configurations based on traffic periodicity and data rate requirements, enabling the system to handle non-integer periodicity and variable rates effectively.
2Reliability
If DRX parameters are adjusted to match XR traffic patterns, then XR service quality is improved, but device complexity increases due to multiple DRX configurations
Solution Approach 1:
The patent segments DRX configurations into multiple predefined sets, each optimized for different XR traffic conditions. The network maintains separate configuration sets and selects appropriate ones based on traffic patterns, reducing the complexity of managing continuous parameter adjustments while still providing fine-grained control over DRX behavior.
Solution Approach 2:
The patent pre-configures multiple DRX parameter sets in advance, each tailored for specific XR service conditions. This preliminary preparation eliminates the need for complex real-time calculations and adjustments, simplifying the device's processing burden while maintaining the ability to adapt to varying traffic patterns.
3Loss of energy
If PDCCH monitoring is reduced through DRX, then power efficiency is improved, but system capacity deteriorates due to insufficient monitoring for quasi-periodic traffic
Solution Approach 1:
The patent implements periodic PDCCH monitoring aligned with XR traffic periodicity through configured DRX cycles. The UE monitors PDCCH at regular intervals defined by drx-ShortCycle and drx-LongCycle parameters, ensuring that monitoring occurs at optimal moments for quasi-periodic XR traffic while maintaining power efficiency during non-monitoring periods.
Data Source
AI summary
Methods, systems, and apparatuses are provided for a UE in a wireless communication system comprising receiving a first signaling to configure at least one value of a Discontinuous Reception (DRX) parameter, receiving, in a serving cell, a second signaling indicating a first value of the DRX parameter or a second value of the at least one value of the DRX parameter, and performing at least one of the following: adjusting the DRX parameter for a first DRX group or a second DRX group of the UE based on a target DRX group indicated in the second signaling or based on whether the serving cell is assigned to the first DRX group or the second DRX group, restarting a drx-onDurationTimer, in response to receiving the second signaling, at a timing calculated based on the first value or the second value of the DRX parameter indicated in the second signaling, stopping the drx-onDurationTimer in response to receiving the second signaling and starting the drx-onDurationTimer at the timing, or stopping the drx-onDurationTimer upon or after transmitting a confirmation in response to reception of the second signaling and starting the drx-onDurationTimer at the timing.