Joint DRX Cycle Modification for Traffic-Adaptive Power Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power consumption and latency for devices with multiple DRX cycles due to misaligned traffic patterns and varying traffic flow periodicities, leading to increased power consumption and potential latency.
Innovation Solution
A UE or network entity modifies a joint DRX cycle by applying rules or indications to skip, extend, or add on-durations of DRX cycles based on conditions or events, optimizing power conservation while maintaining communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE monitors multiple DRX cycles with different periodicities, then traffic patterns can be accommodated, but power consumption increases due to frequent wake-ups
Solution Approach 1:
The patent combines multiple DRX cycles with different periodicities into a single joint DRX cycle. The network entity configures the UE with a joint DRX cycle that integrates the monitoring requirements of multiple individual DRX cycles, allowing the UE to wake up once to monitor all configured search spaces and downlink control information, thereby reducing the number of separate wake-up events and lowering power consumption while maintaining adaptability to multiple traffic patterns
Solution Approach 2:
The joint DRX cycle serves multiple functions simultaneously by consolidating the monitoring of multiple DRX cycles with different periodicities into a single unified structure. This multi-functional approach allows the UE to handle diverse traffic patterns (different periodicities) through a single wake-up event, making the system more versatile while improving energy efficiency
2Use of energy by moving object
If DRX cycles are extended to conserve power, then power consumption decreases, but latency increases due to longer sleep periods
Solution Approach 1:
The patent implements dynamic adjustment of the joint DRX cycle parameters. The network entity can modify the periodicity, on-duration, and offset of the joint DRX cycle based on current traffic conditions and UE state. This dynamic configuration allows the system to extend the DRX cycle for power conservation during low-activity periods while reducing latency during high-activity periods, achieving a balance between power consumption and response time
Solution Approach 2:
The system changes key DRX parameters (periodicity, on-duration length, offset) to optimize the trade-off between power consumption and latency. By adjusting these parameters dynamically based on traffic patterns and network conditions, the system can extend sleep periods to save power while ensuring that wake-up times are optimized to minimize latency for time-sensitive communications
3Reliability
If multiple DRX cycles are monitored separately, then communication reliability is maintained, but signaling resources are wasted due to redundant wake-ups
Solution Approach 1:
The patent merges multiple separate DRX cycle monitoring operations into a single joint DRX cycle monitoring operation. The UE is configured to monitor a unified set of search spaces and downlink control information during a single wake-up event that serves multiple original DRX cycles. This consolidation maintains communication reliability by ensuring all necessary control information is received while eliminating redundant wake-up events that waste signaling resources
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration indicating a rule for modifying a joint discontinuous reception (DRX) cycle of two or more DRX cycles. The UE may wake up based at least in part on the rule. Numerous other aspects are described.