LTE Inter-Cell Parameter Matching via Handover Probability Analysis
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Solution Overview
Problem
In LTE networks, unnecessary handovers can occur if cell reselection parameters and handover parameters are not matched, leading to suboptimal network performance.
Innovation Solution
A method and apparatus to determine the matching of inter-cell reselection parameters and handover parameters by analyzing handover request messages that include history information of terminal cell IDs and stay times, calculating the probability of handover occurrence after RRC establishment, and adjusting parameters if the probability exceeds a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If cell reselection parameters and handover parameters are not matched, then handover can occur quickly after RRC establishment, but unnecessary handovers occur leading to suboptimal network performance
Solution Approach 1:
The patent applies preliminary action by analyzing terminal history information (cell IDs and stay times) before handover occurs. The target base station counts handovers where terminals stay less than a preset time in the source cell, and determines parameter matching status in advance. This allows the system to identify and correct parameter mismatches before they cause unnecessary handovers, thus maintaining fast handover speed while preventing performance degradation.
2Productivity
If cell reselection parameters and handover parameters are not matched, then handover decision is made quickly, but resource wastage increases due to unnecessary handovers
Solution Approach 1:
The patent implements feedback by having the target base station send determination results about parameter matching status back to the source base station. The source base station uses this feedback to adjust cell reselection parameters, ensuring they match handover parameters. This closed-loop feedback mechanism enables quick handover decisions while preventing resource wastage from unnecessary handovers by continuously optimizing parameter consistency.
Data Source
AI summary
Methods and an apparatus for judging matching of inter-cell reselection parameters and handover parameters are disclosed. In some embodiments, a target base station counts the probability that cell handover of a terminal occurs subsequent to a radio resource control connection is established according to a handover request message or a relocation request message. The target base station judges whether the probability exceeds a threshold. If the probability exceeds a threshold, it is determined that the inter-cell reselection parameters and the handover parameters between a source base station and the target base station are not matched. Otherwise, it is determined that the inter-cell reselection parameters and the handover parameters are matched.