Cell Identity Conflict Detection via Interaction Data Search
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Solution Overview
Problem
Existing methods for detecting cell identity conflicts in wireless communications rely on user equipment reporting and neighboring cell lists, which can fail to detect conflicts in overlapping coverage scenarios, leading to handover failures and call drops.
Innovation Solution
A method and apparatus that detect cell identity conflicts by searching for interaction information related to user equipment in other cells at the time of access or connection establishment, without relying on user equipment reporting or neighboring cell lists, using predetermined thresholds to determine recent interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cell information reporting by UE and neighboring cell list comparison is used for conflict detection, then the detection method is simple to implement, but it fails to detect conflicts in overlapping coverage scenarios where UE does not trigger reporting or neighboring cell lists do not intersect
Solution Approach 1:
The patent introduces a network-side device (base station or network controller) as an intermediary to perform conflict detection. Instead of relying on UE reporting, the network-side device actively queries multiple base stations about their serving cells and compares cell identities, thereby mediating the detection process to overcome the limitations of UE-dependent methods.
Solution Approach 2:
The patent performs preliminary conflict detection by querying base stations about their serving cells before handover operations occur. By proactively checking for cell identity conflicts in advance (comparing PCIs of serving cells and neighboring cells), the system identifies potential conflicts before they cause handover failures or call drops.
2Reliability
If the number of cell identities is increased to avoid conflicts, then conflict detection becomes easier, but the system complexity and resource allocation become more difficult due to limited available identities (512 PSCs in UMTS, 504 PCIs in LTE)
Solution Approach 1:
The patent implements a self-service mechanism where the network system automatically detects and identifies cell identity conflicts without requiring manual intervention or increased resource allocation. The conflict detection method autonomously queries base stations, compares cell identities, and identifies conflicts, allowing the system to manage limited cell identity resources efficiently without human involvement.
3Reliability
If network planning isolates cells with same cell identity as far as possible, then conflicts can be prevented in ideal scenarios, but actual networking complexity, geographical locations, and environmental changes make it difficult to prevent overlapping coverage and conflicts
Solution Approach 1:
The patent implements a feedback mechanism that actively monitors the network for cell identity conflicts. By continuously querying base stations about their serving cells and comparing cell identities against neighboring cell lists, the system receives feedback about actual network conditions and detects conflicts that arise despite network planning efforts, enabling post-deployment conflict identification.
Data Source
AI summary
Embodiments of the present invention provide a method and an apparatus for detecting a cell identity conflict. The method includes: determining that a user equipment accesses a first cell or performs connection establishment or connection re-establishment in a first cell at a first time point T1; searching whether interaction information related to the user equipment exists in other cells except the first cell near the first time point T1; and performing cell identity conflict detection on the first cell and a second cell when it is found, through the searching, that the interaction information related to the user equipment exists in the second cell among the other cells near the first time point T1. The embodiments of the present invention do not rely on a neighboring cell list and an operation of reporting cell information by a user equipment, thereby improving detection efficiency of a cell identity conflict.