UE Idle Mode Measurement Scheduling for Power and Reselection
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing idle mode cell measurements, as they often increase measurement frequency based on serving cell signal quality without considering neighbor cell signal quality, leading to unnecessary power consumption and suboptimal coverage.
Innovation Solution
The method involves selecting idle mode measurement scheduling modes based on a comparison of reference signal measurements between serving and neighbor cells, triggering a panic mode only when the neighbor cell signal is significantly stronger, to justify increased measurement frequency and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If measurement frequency is increased based on serving cell signal quality alone, then cell reselection responsiveness is improved, but power consumption increases unnecessarily
Solution Approach 1:
The patent dynamically changes the measurement frequency parameter based on a composite condition that evaluates both serving cell signal quality and neighbor cell signal quality. When the neighbor cell signal is significantly stronger than the serving cell signal (by a threshold margin), the measurement frequency is increased to improve cell reselection responsiveness. Otherwise, the measurement frequency is reduced to save power, thus resolving the contradiction between responsiveness and power consumption.
Solution Approach 2:
The patent implements a feedback mechanism where the UE continuously monitors both serving cell and neighbor cell reference signal qualities, compares them against threshold conditions, and adjusts measurement frequency accordingly. This closed-loop control ensures that measurement frequency is optimized based on real-time radio conditions, preventing unnecessary power consumption while maintaining adequate cell reselection responsiveness.
2Loss of time
If measurement frequency is increased to improve cell reselection time, then mobility performance is improved, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts the measurement frequency parameter based on real-time comparison between serving cell and neighbor cell reference signal qualities. When the neighbor cell signal exceeds the serving cell signal by a configured threshold (indicating potential handover benefit), measurement frequency is increased to reduce cell reselection time. When this condition is not met, measurement frequency is reduced to conserve power, thus optimizing the trade-off between reselection time and power consumption.
3Adaptability or versatility
If neighbor cell measurement is performed more frequently, then handover opportunity is improved, but power consumption increases
Solution Approach 1:
The patent dynamically changes the neighbor cell measurement frequency based on a conditional evaluation of both serving cell and neighbor cell reference signal qualities. When the neighbor cell signal is significantly stronger than the serving cell signal (by a threshold margin), the UE increases neighbor cell measurement frequency to improve handover opportunities. Otherwise, the measurement frequency is reduced to save power, resolving the contradiction between handover opportunity and power consumption.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for cell measurement scheduling mode selection. According to certain aspects, a method for wireless communications by a user equipment (UE), generally includes selecting a first scheduling mode for performing cell measurements while the UE is in an idle state, in response to detecting at least one first triggering condition based on a comparison of a serving cell measurement to one or more neighbor cell measurements and performing cell measurements in accordance with the first scheduling mode, wherein the UE performs cell measurement more frequently when the first scheduling mode is selected than when a second scheduling mode is selected.