NTN Conditional Handover Measurements at Time and Distance Events
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for conditional handover in non-terrestrial networks (NTN) do not specify a methodology for conducting simultaneous time or distance-based measurements, leading to excessive resource usage and higher power consumption due to improper selection of time instances for signal and distance measurements.
Innovation Solution
The method establishes specific time instances and periodicities for signal measurements based on timer-based or distance-based events, considering the UE's mobility state, t-service value of the serving NTN cell, and associated events, to optimize resource usage and power consumption during conditional handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If simultaneous time or distance-based measurements are conducted for conditional handover in NTN, then measurement accuracy is improved, but resource usage increases and power consumption increases
Solution Approach 1:
The patent implements periodic measurements instead of simultaneous continuous measurements. The UE performs signal measurements and distance measurements at different time instances according to a configured periodicity, which reduces power consumption while maintaining measurement accuracy through systematic sampling over time.
Solution Approach 2:
The patent segments the measurement process into distinct phases: signal measurement phase and distance measurement phase. These measurements are performed sequentially at different time instances rather than simultaneously, allowing the UE to reduce resource usage and power consumption by activating measurement functions only when needed.
2Measurement precision
If simultaneous signal and distance measurements are performed, then handover decision accuracy is improved, but resource usage increases
Solution Approach 1:
The patent employs periodic measurement intervals where signal measurements and distance measurements are performed at alternating or sequential time instances. This periodic approach ensures that both measurement types are captured over time for accurate handover decisions, while reducing instantaneous resource demands by not performing both measurements simultaneously.
Solution Approach 2:
The patent performs preliminary assessments by checking timer-based or distance-based events before initiating full signal measurements. This preliminary action filters out cases where measurements are unnecessary, reducing overall resource usage while maintaining handover decision accuracy by only performing measurements when conditions warrant them.
3Reliability
If frequent measurements are conducted to ensure service continuity, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic measurements with configurable intervals that balance service continuity requirements with power consumption. By systematically performing measurements at regular intervals rather than continuously, the UE maintains reliable service monitoring while significantly reducing power consumption compared to continuous measurement approaches.
Data Source
AI summary
Embodiments herein provide a method performed by a user equipment (UE) for handling a conditional handover (CHO) in non-terrestrial network (NTN). The method includes receiving, by the UE, CHO configuration information associated with one or more target candidate cells. The CHO configuration information includes a signal measurements-based event and one of a timer-based event or a distance-based event. Further, starting a measurement for one of the timer-based event or the distance-based event associated with the one or more target candidate cells at a first time instance. Also, determining whether the measurement for one of the timer-based event or the distance-based event is completed. Furthermore, the method includes performing a measurement for the signal measurements-based event associated with the one or more target candidate cells at a second time instance, in accordance with a determination that the measurement for one of the time-based based event or the distance-based event is completed.