NTN Measurement Reporting for Stable Conditional Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During cell handover processes, particularly in conditional handover, the use of a single trigger condition for measurement reporting leads to unreliable results, resulting in unnecessary handovers and ping-pong handovers, increasing overhead for link recovery and reconstruction.
Innovation Solution
Implementing a method for wireless communication where measurement reporting is triggered by a first condition associated with a plurality of triggers, including measurement-based, location-based, time/timer-based, and elevation angle-based triggers, to comprehensively consider various factors affecting cell handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement reporting is triggered by a single trigger condition, then the handover process is simple and fast, but the reliability of handover decision is poor leading to unnecessary handovers and ping-pong handovers
Solution Approach 1:
The patent combines multiple trigger conditions (measurement-based, location-based, time/timer-based, and elevation angle-based triggers) into a unified trigger condition associated with a plurality of triggers. This merging approach ensures that handover decisions are made only when multiple conditions are satisfied, significantly improving the reliability of handover decisions and reducing unnecessary handovers and ping-pong handovers.
Solution Approach 2:
The patent introduces multiple parameters for trigger condition evaluation including measurement results, location information, time/timer values, and elevation angles. By changing from a single parameter trigger to multi-parameter triggers, the system achieves more reliable handover decisions while managing complexity through structured parameter evaluation.
2Reliability
If multiple trigger conditions are used for measurement reporting, then the reliability of handover decision is improved, but the signaling overhead increases
Solution Approach 1:
The patent segments the evaluation of multiple trigger conditions into distinct modules: measurement-based evaluation, location-based evaluation, time/timer-based evaluation, and elevation angle-based evaluation. Each module independently assesses its specific condition, and only when all conditions are satisfied is the handover triggered. This segmentation reduces signaling overhead by avoiding redundant information transmission while maintaining high reliability.
3Reliability
If comprehensive factors are considered for handover, then unnecessary handovers are reduced, but the complexity of handover process increases
Solution Approach 1:
The patent performs preliminary evaluation of all trigger conditions (measurement, location, time/timer, elevation angle) before initiating the handover process. By pre-evaluating multiple conditions and only proceeding when all are satisfied, the system ensures handover stability while maintaining operational simplicity through a clear conditional framework that guides the handover decision-making process.
Data Source
AI summary
A method for wireless communication, a terminal device, and a network device are provided. One example method for wireless communication includes: sending, by a terminal device operating in a non-terrestrial communication network (NTN), a measurement report, wherein the sending of the measurement report is triggered based on a first condition, and the first condition is associated with a plurality of triggers, wherein the plurality of triggers include a measurement-based trigger and a location-based trigger, and wherein the first condition is associated with a first position offset, the first position offset indicate at least one of a position offset between the terminal device and a serving cell, or a position offset between the terminal device and a first candidate cell, and wherein the first candidate cell is one of one or more candidate cells configured for the terminal device by the serving cell.