5G Handover Processing with Valid Time and Access Limits
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Solution Overview
Problem
In 5G New Air Interface (NR) technology, when a user equipment (UE) fails to trigger a handover, it directly enters an idle state or triggers a re-establishment process, leading to significant data interruption delays due to the lack of effective management of pre-configured target handover cells.
Innovation Solution
A cell handover processing method that involves obtaining configuration information of target handover cells, including valid time and quantity of valid access times, to perform handovers within specified durations, allowing multiple access attempts and preventing direct idle state entry or re-establishment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE directly enters idle state or triggers re-establishment process after handover failure, then the system complexity is reduced, but data interruption delay increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple target handover cells and their validity parameters (valid time and quantity of valid access times) before handover failure occurs. When handover fails, the UE can immediately utilize these pre-configured cells without complex processing, thus reducing data interruption delay while maintaining system complexity at acceptable levels.
2Reliability
If multiple pre-configured handover cells are available, then handover reliability is improved, but device complexity increases due to additional configuration management
Solution Approach 1:
The patent utilizes parameter changes by introducing two key parameters - valid time and quantity of valid access times - to dynamically control the lifecycle of pre-configured target handover cells. These parameters automatically manage the complexity of having multiple pre-configured cells by defining their validity periods and access limits, thereby improving handover reliability without proportionally increasing device complexity.
3Reliability
If the UE performs multiple access attempts within valid time and access times, then handover success rate is improved, but time loss increases due to extended access process
Solution Approach 1:
The patent applies dynamics by making the target handover cell configuration dynamic through the valid time and quantity of valid access times parameters. The configuration remains active only within specified time windows and access attempt limits, allowing the system to adapt between maintaining configuration availability for multiple attempts and releasing resources to minimize time loss, thereby balancing handover success rate with access process time.
Data Source
AI summary
The present disclosure provides a cell handover processing method and device and an apparatus. The method includes: obtaining configuration information of a target handover cell and at least one of the following information: valid time of cell configuration information or a quantity of valid access times; performing cell handover according to the configuration information of the target handover cell within the valid time of cell configuration information and/or the quantity of valid access times.