Prioritizing Measurement Event Timers Over CDRX Off Periods
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Solution Overview
Problem
In wireless communications, measurement reports transmitted during Connected Discontinuous Reception (CDRX) mode may be delayed or discarded when due during CDRX OFF periods, leading to timeliness and accuracy issues for handover decisions, as they may contain outdated information.
Innovation Solution
The method prioritizes the measurement event timer over the low-power period by modifying the CDRX OFF period, allowing for early transmission of measurement reports before entering the CDRX OFF period, ensuring timely and accurate reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE transmits measurement reports during CDRX OFF periods, then power consumption is reduced, but measurement report timeliness deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting measurement events and determining their timing relative to CDRX cycles before the actual CDRX OFF period begins. The UE identifies when measurement reports would be due and proactively schedules their transmission during CDRX ON periods, preventing the timeliness problem before it occurs. This is achieved through the timing determination module that compares measurement event timers with CDRX cycle timing.
Solution Approach 2:
The patent implements dynamics by making the CDRX cycle configuration adaptable based on measurement event timing. When measurement events are detected that would occur during CDRX OFF periods, the system dynamically adjusts the CDRX cycle parameters (such as drx-OnDuration or drx-InactivityTimer) to ensure measurement reports are transmitted during ON periods. This creates a flexible system that balances power savings with measurement timeliness requirements.
2Use of energy by moving object
If the UE delays measurement report transmission until the next CDRX ON period, then power efficiency is maintained, but handover decision accuracy deteriorates
Solution Approach 1:
The patent applies feedback by continuously monitoring measurement events and their timing relative to CDRX cycles, then using this information to adjust transmission scheduling. The base station receives measurement reports with timing information and can provide feedback about handover decisions, which the UE uses to refine its measurement event detection and CDRX timing adjustments. This closed-loop approach ensures handover decisions are based on timely measurements while maintaining power efficiency.
Solution Approach 2:
The system performs preliminary action by identifying measurement events that would occur during CDRX OFF periods and proactively scheduling their transmission during upcoming CDRX ON periods. This prevents the need to delay transmission until the next ON period, ensuring handover decisions are made with current measurement data while still maintaining power efficiency by utilizing scheduled transmission opportunities.
3Loss of time
If the UE exits CDRX OFF period prematurely to transmit measurement reports, then measurement report timeliness is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by detecting measurement events and determining their timing relative to CDRX cycles before the OFF period begins. The UE proactively schedules measurement report transmission during upcoming CDRX ON periods, eliminating the need to exit the OFF period prematurely. This approach maintains measurement timeliness while preserving power efficiency by utilizing pre-scheduled transmission opportunities.
Solution Approach 2:
The system implements dynamics by adjusting CDRX cycle parameters based on measurement event timing. When measurement events are detected that would occur during OFF periods, the system dynamically modifies the CDRX configuration (such as extending the ON duration or adjusting cycle timing) to accommodate measurement report transmission without requiring premature exit from the OFF period.
4Use of energy by moving object
If the UE discards measurement reports generated during CDRX OFF periods, then power efficiency is maintained, but measurement accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting measurement events and determining their timing relative to CDRX cycles before the OFF period begins. The UE identifies measurement events that would occur during OFF periods and proactively schedules their transmission during upcoming ON periods, ensuring no measurement reports are discarded. This approach maintains measurement accuracy while preserving power efficiency through scheduled transmission.
Solution Approach 2:
The system implements feedback by continuously monitoring measurement events and comparing their timing with CDRX cycle timing. This feedback mechanism ensures that measurement reports are identified and scheduled for transmission during appropriate ON periods, preventing discarding of valid measurements while maintaining power efficiency through controlled transmission scheduling.
Data Source
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AI summary
Methods, systems, apparatuses, and devices are described for transmitting a measurement report during wireless communications. When, for example, a low-power period (e.g., CDRX OFF period) is scheduled to begin during a time defined by a measurement event timer (TTT timer), a UE may modify the low-power period. The low-power period may be modified based, at least in part on determining the low-power period of the UE will begin during a time defined by a measurement event timer, a duration of the measurement event timer, and a duration of the low-power period. Modifying the low-power period may include delaying the start of the low-power state until after transmission of the MR associated with the measurement event timer or skipping the low-power period altogether. The UE may transmit the MR based, at least in part, on the modification.