Conditional Cell Switch Control for Lower Mobility Latency
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Solution Overview
Problem
Existing mobility management mechanisms in wireless communication systems, particularly in 5G NR networks, face challenges in handling concurrent mobility events during ongoing cell switch operations, leading to mobility latency and loss of optimal connection opportunities due to inadequate management of conditional cell switch configurations.
Innovation Solution
Implementing methods and apparatus for managing conditional cell switch operations by suspending and resuming cell switch condition evaluations based on specific configuration conditions, ensuring seamless continuation of conditional evaluations after cell switch completion, and supporting subsequent mobility operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conditional cell switch conditions evaluation is continued during ongoing cell switch execution, then subsequent mobility opportunities may be captured, but mobility latency increases due to potential interruptions
Solution Approach 1:
The patent applies preliminary action by stopping the conditional cell switch conditions evaluation when a cell switch is triggered, before the switch execution completes. This prevents the evaluation from causing interruptions during the critical switch period, thereby reducing mobility latency while maintaining the capability to resume evaluation afterward for subsequent mobility opportunities
Solution Approach 2:
The patent implements dynamics by making the conditional cell switch conditions evaluation dynamically controllable - it can be stopped during ongoing cell switch execution and resumed after completion based on configuration conditions. This dynamic adjustment resolves the contradiction by adapting the evaluation behavior to the current execution state, preventing latency while preserving subsequent mobility capability
2Loss of time
If conditional cell switch conditions evaluation is stopped during ongoing cell switch execution, then mobility latency is reduced, but subsequent mobility opportunities may be lost
Solution Approach 1:
The patent applies preliminary action by pre-configuring the suspension and resumption behavior of conditional cell switch conditions evaluation. The evaluation is stopped in advance during cell switch execution and is set to resume automatically after completion based on configuration conditions, ensuring both reduced latency and preserved subsequent mobility capability through predetermined control logic
Solution Approach 2:
The patent implements feedback by monitoring the completion status of cell switch operations and using this feedback to determine when to resume the conditional cell switch conditions evaluation. This feedback mechanism ensures that the evaluation is restarted at the appropriate time to capture subsequent mobility opportunities while having been suspended during the execution period to minimize latency
Data Source
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AI summary
The present disclosure discloses a method of conditional cell switch applied to a User Equipment, UE, (120). The method includes: upon a cell switch being triggered, stopping, by a processor (221) of the UE (120), a cell switch conditions evaluation if the UE (120) is performing the cell switch conditions evaluation; and determining whether to perform the cell switch conditions evaluation once the cell switch is completed. The determination process includes determining whether at least one execution condition is configured within a selected candidate target configuration, and when determining that the at least one execution condition is configured, performing the cell switch conditions evaluation according to the execution condition once the cell switch is completed. The present disclosure can avoid unnecessary interruption of ongoing cell switch operations while supporting subsequent mobility operations, effectively reducing mobility latency and enhancing mobility management efficiency of wireless communication systems (100).