Base Station Handover Control for Retaining Cell Setting Information
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Solution Overview
Problem
In cellular communication systems, frequent switching between connection destinations due to small cells leads to inefficient deletion and reconfiguration of setting information during handovers, particularly in conditional handovers, which can disrupt communication continuity.
Innovation Solution
A base station apparatus and terminal apparatus system that manages advance setting information for potential handover targets, allowing the terminal apparatus to hold or delete this information based on notifications from the current base station, optimizing the use of setting information by reducing unnecessary deletions and reconfigurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If setting information is deleted after connecting to a post-change connection destination in conditional handover, then communication continuity is maintained, but processing efficiency deteriorates due to repetitive deletion and reconfiguration in frequent handover environments
Solution Approach 1:
The patent applies the discarding and recovering principle by allowing the terminal apparatus to retain setting information related to first another base station apparatus even after connecting to a second another base station apparatus, instead of deleting it. This recovered information can be reused in subsequent handovers, eliminating repetitive configuration processes and improving processing efficiency while maintaining communication continuity.
2Productivity
If setting information is retained after handover to reduce reconfiguration overhead, then processing efficiency improves, but information management complexity increases
Solution Approach 1:
The patent implements feedback by having the base station apparatus notify the terminal apparatus whether to delete setting information related to first another base station apparatus after connecting to a second another base station apparatus. This feedback mechanism allows the terminal to automatically manage information retention based on network decisions, reducing information management complexity while maintaining processing efficiency.
3Manufacturing precision
If advance setting information is reconfigured on each handover occasion in small cell environments, then connection accuracy is maintained, but time loss increases due to frequent processing overhead
Solution Approach 1:
The patent applies preliminary action by allowing setting information to be configured in advance for potential handover targets and retaining this information across multiple handovers. This eliminates the need to reconfigure settings on each handover occasion, significantly reducing handover processing time while maintaining connection accuracy through the pre-configured information.
Data Source
AI summary
A base station apparatus notifies a terminal apparatus of whether to delete setting information related to a first another base station apparatus when the terminal apparatus has connected to a second another base station apparatus different from the first another base station apparatus due to a handover or a change or addition of a secondary cell, in a case where the terminal apparatus holds the setting information related to the first another base station apparatus.