Handover Selection Using Connection History to Mitigate PSC Confusion
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Solution Overview
Problem
In the HNB handover process, PSC Confusion occurs when multiple cells share the same PSC, making it difficult for the Source HNB to accurately identify the Target HNB, leading to handover failures.
Innovation Solution
A mobile communication system that uses connection history information to select the Target base station, prioritizing those with high success rates and avoiding PSC Confusion by using a Confusion flag and ranking handover destination candidates based on past switching success and failure records.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cells share the same PSC to increase network capacity and flexibility, then the adaptability and coverage of the mobile communication system are improved, but the reliability of handover identification deteriorates due to PSC Confusion
Solution Approach 1:
The patent introduces an intermediary mechanism (handover history information and Confusion flag) between the Source HNB and Target HNB to resolve the identification ambiguity. When PSC Confusion is detected, the system uses historical handover success/failure data as a mediator to select the appropriate target cell, enabling reliable handover identification despite multiple cells sharing the same PSC
Solution Approach 2:
The system performs preliminary actions by collecting and storing handover history information before handover confusion occurs. This pre-collected data (handover success/failure records) is prepared in advance to enable quick and accurate target cell selection when PSC Confusion arises, preventing handover failures
2Ease of operation
If the Source HNB uses PSC to identify the Target HNB during handover, then the ease of operation and simplicity of the handover process are improved, but the reliability of handover execution deteriorates when PSC Confusion occurs
Solution Approach 1:
The patent makes the handover identification process dynamic by adapting the identification method based on whether PSC Confusion is detected. The system dynamically switches from simple PSC-based identification to a more robust method using handover history information and Confusion flags, maintaining ease of operation while improving reliability in confusing scenarios
Solution Approach 2:
The system implements feedback by using handover history information (success/failure records) to improve future handover decisions. When PSC Confusion occurs, the feedback mechanism allows the Source HNB to select target cells based on historical performance data, thereby maintaining high reliability while preserving the simplicity of the overall handover process
Data Source
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AI summary
A processing apparatus operates aiming to realize handover to each mobile station while reducing a failure rate of the handover even when PSC Confusion is generated. More specifically, when a connection of the mobile station is switched from a first base station to a second base station, the processing apparatus determines the second base station by selecting from a plurality of base stations according to connection history information indicating a success or a failure of past switching of the connection from the first base station to at least one of the plurality of base stations.