UE CDRX Measurement Scheduling for Mobility and Power Balance
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Solution Overview
Problem
There is a trade-off between power consumption and throughput in user equipment (UE) operating in Connected Mode Discontinuous Reception (CDRX), where prioritizing power savings can degrade mobility performance, and prioritizing mobility can increase power consumption.
Innovation Solution
A UE operates using a No DRX minimum measurement period to measure objects more frequently and report measurements less frequently, adapting CDRX based on status information from the modem, such as RSRP, RSRQ, SINR, and regional information, to balance power savings and mobility performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE sleeps during off-durations of CDRX cycle to reduce power consumption, then power consumption is reduced, but mobility performance degrades
Solution Approach 1:
The patent applies dynamics by making the DRX configuration adaptive rather than fixed. The UE dynamically adjusts DRX parameters (such as on-duration time, off-duration time, and measurement periods) based on real-time channel conditions, mobility state, and network topology. This allows the system to optimize between power saving and mobility performance according to actual operational requirements, resolving the contradiction between sleeping during off-durations and maintaining mobility performance.
Solution Approach 2:
The patent changes key parameters of the CDRX cycle including on-duration time, off-duration time, and measurement reporting periods based on channel conditions and mobility state. By adjusting these parameters dynamically, the system can extend sleep periods when mobility requirements are low and reduce sleep duration when mobility performance is critical, thus balancing power consumption and mobility performance.
2Reliability
If mobility performance is prioritized over sleeping during off-durations, then mobility performance is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts DRX parameters based on real-time assessment of mobility requirements and channel conditions. When mobility performance is critical, the system extends on-duration or reduces off-duration to maintain measurement and handover capabilities. When mobility requirements are low, the system maximizes sleep periods to reduce power consumption, thus resolving the contradiction adaptively.
Solution Approach 2:
The patent modifies DRX parameters such as on-duration time, off-duration time, and measurement reporting intervals based on current operational conditions. This parameter adjustment allows the system to prioritize mobility performance when needed and prioritize power saving when mobility requirements are reduced, effectively resolving the trade-off between the two objectives.
3Reliability
If the UE measures objects more frequently to improve mobility performance, then mobility performance is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic measurement reporting with adjustable periods based on channel conditions and mobility state. Instead of continuous measurement, the system performs measurements at scheduled intervals during on-durations and uses prediction algorithms to estimate channel conditions during off-durations. This periodic action reduces power consumption while maintaining sufficient measurement accuracy for mobility management.
Solution Approach 2:
The system uses self-service by employing prediction algorithms that leverage historical measurement data and current channel conditions to forecast future channel state without requiring actual measurements during off-durations. This allows the UE to maintain mobility performance awareness while sleeping, reducing the frequency of actual measurements and thus power consumption.
Data Source
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AI summary
The devices, systems, methods, and techniques described herein provide for efficient operation of a user equipment (UE) configured to support mobility mechanisms while using connected mode discontinuous reception (CDRX). In some aspects, a UE configured to use CDRX may measure objects according to a No DRX minimum measurement period (e.g., a minimum measurement period configured when no DRX is used). Because the No DRX minimum measurement period may be shorter than a DRX minimum measurement period, the UE may be able to measure objects more frequently and improve mobility performance. Further, although the UE may perform measurements according to the No DRX minimum measurement period, the UE may still report the measurements according to a DRX minimum measurement period. Thus, the UE may report measurements less frequently, and the UE may sleep during more off-durations of a CDRX cycle, resulting in reduced power consumption.