XR Downlink DRX Adaptation for Power and Packet Timing
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Solution Overview
Problem
Extended Reality (XR) devices face challenges in power management due to misalignment of Discontinuous Reception (DRX) cycles with varying XR traffic patterns, leading to increased power consumption and battery drain.
Innovation Solution
Implementing dynamic adaptation of DRX parameters, including early termination of Active Time and PDCCH monitoring, and multi-DRX solutions to align with XR traffic patterns, reducing power consumption by modifying monitoring based on specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX cycles are used to save power, then power consumption is reduced, but packet arrival due to jitter causes misalignment with DRX ON duration leading to increased power consumption
Solution Approach 1:
The patent implements dynamic DRX configuration where the network can adjust DRX parameters (on duration, periodicity, offset) based on actual traffic patterns and jitter conditions. This allows the system to adapt between power-saving mode and reliable reception mode, resolving the contradiction between reducing power consumption and maintaining packet reception reliability under jitter conditions
Solution Approach 2:
The patent changes DRX parameters dynamically based on traffic conditions. When jitter is detected or traffic patterns change, the system modifies on duration length, periodicity, or offset to align with packet arrival times, thereby maintaining reliability while optimizing power consumption
2Reliability
If DRX cycles are aligned to packet inter-arrival times, then packet reception is improved, but UE power consumption increases
Solution Approach 1:
The patent applies partial alignment strategy where DRX ON duration is extended only partially beyond the expected packet arrival time to account for jitter, rather than continuously monitoring. This partial extension maintains reliable packet reception while minimizing the time the UE remains active, thus controlling power consumption
3Adaptability or versatility
If multiple traffic flows with different parameters are supported, then service quality is improved, but DRX cycle alignment becomes more complex
Solution Approach 1:
The patent segments the DRX configuration into multiple independent DRX configurations, each tailored to specific traffic flows with different characteristics (e.g., video vs. audio). This allows each traffic flow to have optimized DRX parameters without affecting others, managing complexity through structured segmentation while maintaining high adaptability
Solution Approach 2:
The patent creates a universal DRX management mechanism that can handle multiple traffic flows with different parameters through a unified configuration framework. The system uses common control structures and parameter sets that can be selectively applied to different traffic types, achieving multi-functionality without proportionally increasing complexity
Data Source
AI summary
A method performed by at least one processor in a user equipment (UE) includes monitoring a downlink channel in accordance with one or more parameters associated with an on duration timer and an inactivity timer, the on duration timer specifying a time period in which the UE monitors the downlink channel, the inactivity timer specifying a time period in which the UE remains on after reception of downlink information in the downlink channel. The method includes determining whether a predetermined condition for modifying the monitoring of the downlink channel is satisfied. The method further includes, in response to determining the predetermined condition is satisfied, modifying the monitoring of the downlink channel such that power consumption of the UE is reduced.