Conditional Handover Deconfiguration for Failed Wireless Handoffs
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing conditional handover (CHO) configurations, leading to inefficient resource utilization, increased latency, and service interruptions due to failed handovers.
Innovation Solution
Implementing techniques for conditional handover deconfiguration and failure handling, where user equipment (UE) autonomously manages CHO configurations based on measurement thresholds and timers, deconfiguring failed configurations and attempting handovers with alternative target base stations until successful, and reporting measurements to the source base station for resource release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CHO configurations are maintained for multiple target base stations, then handover options and adaptability are improved, but device complexity and resource management burden increase
Solution Approach 1:
The patent extracts and removes failed CHO configurations from the set of active configurations. When a handover to a target base station fails, the corresponding CHO configuration is deleted from the UE's configuration set, thereby reducing complexity while preserving only viable handover options.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports measurement results and handover status to the source base station. This feedback enables the network to dynamically adjust CHO configurations, remove failed ones, and optimize future handover decisions, thus managing complexity through intelligent control.
2Reliability
If CHO configurations are maintained until successful handover, then reliability is improved, but loss of time and resource utilization efficiency worsen
Solution Approach 1:
The patent performs preliminary actions by pre-configuring multiple CHO configurations before handover is needed. However, it also implements preliminary failure detection through measurement reporting, allowing the system to identify and remove failed configurations early, thus reducing unnecessary time expenditure on maintaining unsuccessful handover attempts.
Solution Approach 2:
The patent discards failed CHO configurations that no longer lead to successful handovers, while recovering and reusing successful handover patterns and configurations. This selective retention strategy reduces the time spent maintaining obsolete configurations while preserving reliable handover paths.
3Ease of operation
If autonomous UE management of CHO configurations is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the UE to autonomously manage CHO configurations through autonomous decision-making. The UE independently evaluates measurement results, selects target base stations, executes handovers, and removes failed configurations without requiring continuous network control, thereby simplifying operation while the UE's internal complexity handles the complexity.
4Reliability
If failed handovers trigger connection re-establishment, then reliability is improved, but loss of time and service interruptions increase
Solution Approach 1:
The patent performs preliminary actions by pre-configuring multiple alternative CHO configurations before handover is needed. When a handover fails, the UE can immediately attempt alternative configurations without waiting for complete connection re-establishment, thus reducing service interruption time while maintaining reliability through prepared backup options.
Solution Approach 2:
The patent maintains continuity of useful action by keeping multiple CHO configurations active and ready for immediate use. Instead of completely terminating and re-establishing connections when handover fails, the system continues with alternative configurations that are already prepared, thereby reducing downtime while ensuring reliable connection maintenance.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described for management of conditional handover (CHO) configurations. A source base station may configure a user equipment (UE) with one or more CHO configurations for multiple target base stations. The CHO configurations may provide, for each target base station, one or more associated conditions that may trigger the UE to initiate a handover to the particular target base station, or to deconfigure a CHO configuration, such as based on a measurement threshold of one or more target base station measurements, one or more source base station measurements, or combinations thereof. The CHO configurations may also include failure handling information for initiating one or more subsequent handovers responsive to a failure of an initial handover attempt.