Conditional Mobility With Partially Compliant Commands
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In conditional handover (CHO) scenarios for 3GPP LTE, the increased number of target cells in a handover command can lead to a higher probability of configuration compliance errors, as the user equipment (UE) must evaluate and comply with multiple target cell configurations, which may become invalid due to changes in source cell configurations, potentially causing handover failures.
Innovation Solution
A method where a wireless device evaluates mobility execution conditions only for cells with compliant target cell configurations, excluding non-compliant cells from the evaluation and potentially updating or releasing incompliant target cell configurations to ensure successful handover, thereby reducing the risk of configuration compliance errors and handover failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple target cell configurations are included in CHO command to improve handover robustness, then the probability of configuration compliance error increases
Solution Approach 1:
The patent segments the evaluation process by dividing target cells into compliant and non-compliant groups. The UE evaluates mobility execution conditions separately for each group, processing only compliant cells to avoid errors from non-compliant configurations. This segmentation resolves the contradiction by maintaining multiple target cell configurations for robustness while ensuring accurate evaluation through selective processing.
2Reliability
If the number of target cells in CHO command increases to improve mobility robustness, then the complexity of configuration evaluation increases
Solution Approach 1:
The patent extracts non-compliant target cell configurations from the evaluation process. The UE identifies and excludes non-compliant cells before evaluating mobility execution conditions, taking only the compliant configurations into consideration. This extraction reduces evaluation complexity while maintaining the benefits of multiple target cell configurations for mobility robustness.
3Adaptability or versatility
If all target cell configurations are evaluated to ensure comprehensive handover options, then the risk of configuration compliance errors increases
Solution Approach 1:
The patent applies preliminary action by performing compliance checking before mobility execution condition evaluation. The UE identifies compliant target cell configurations in advance, creating a filtered set of valid options. This preliminary filtering ensures comprehensive handover options are considered while preventing configuration compliance errors from affecting the evaluation process.
Data Source
AI summary
A method and apparatus for conditional mobility with partially compliant mobility command in a wireless communication system is provided. A wireless device evaluates a mobility execution condition from one or more mobility execution conditions only for cells for which corresponding target cell configuration from one or more target cell configurations can be complied.