Network-Assisted Reference Signal Sampling Rate Adaptation in MPUE Handover
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Solution Overview
Problem
Multi-panel user equipment (MPUEs) face challenges in accurately determining sampling rates for reference signal measurements due to varying cell border propagation characteristics, leading to inaccurate mobility decisions and increased power consumption, which are not effectively addressed by existing mobility robustness optimization mechanisms.
Innovation Solution
The network provides sampling rate recommendations based on cell border propagation characteristics, using functions that consider factors like signal strength, time-to-trigger, and conditional handover readiness, allowing MPUEs to adapt their sampling rates per panel accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MPUEs activate all panels simultaneously for simultaneous measurements, then measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic panel activation where the UE adapts the number of activated panels based on mobility conditions. When mobility detection indicates stable conditions, fewer panels are activated to save power. When rapid movement is detected, more panels are activated to maintain measurement accuracy. This dynamic adjustment resolves the contradiction between continuous high-accuracy measurements and power conservation.
Solution Approach 2:
The system changes the parameter of panel activation state based on detected mobility characteristics. By monitoring mobility parameters and adjusting panel activation accordingly, the system transitions between different measurement modes (full panel activation for high accuracy vs. selective activation for power saving), effectively managing the trade-off between measurement precision and power consumption.
2Stability of the object's composition
If filtering is applied to mitigate measurement fluctuations, then measurement stability is improved, but measurement delay increases
Solution Approach 1:
The patent dynamically adjusts filtering strength based on detected mobility characteristics. When the UE detects rapid movement or unstable conditions, it reduces filtering intensity to minimize delay and provide timely handover decisions. When conditions are stable, stronger filtering is applied to enhance measurement stability. This dynamic filtering approach resolves the contradiction between stability and responsiveness.
3Measurement precision
If sampling rate is increased for accurate measurements, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the sampling rate of reference signal measurements based on detected mobility characteristics. When mobility detection indicates the UE is in a stable environment with slow movement, the sampling rate is reduced to conserve battery power. When rapid movement or unstable conditions are detected, the sampling rate is increased to maintain measurement accuracy for timely handover decisions. This resolves the contradiction between continuous high-precision measurements and power conservation.
4Reliability
If mobility robustness optimization is enhanced, then handover reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the mobility robustness optimization into modular components: mobility detection module, panel activation control module, filtering adjustment module, and sampling rate adaptation module. Each module handles a specific aspect of the optimization process independently. This segmentation improves handover reliability through comprehensive optimization while managing device complexity by organizing functionality into manageable, independent units that can be implemented and maintained separately.
Data Source
AI summary
Method comprising: monitoring whether a terminal receives a function depending on one or more pieces of information used for preparing and/or performing a handover and/or a conditional handover from a source cell to a target cell; obtaining the one or more pieces of information; determining a value of the function based on the obtained one or more pieces of information if the function is received; setting a first sampling rate for measurements, by the terminal, of a reference signal of the source cell and for measurements, by the terminal, of the reference signal of the target cell based on the value of the function.