Neighbor Table Updates for Dissimilar Channel Handovers
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Solution Overview
Problem
Existing systems fail to efficiently handle handovers in mobile/cellular networks when cells are reassigned to dissimilar channel assignments, leading to call drops due to undefined neighbor relationships for cells operating on different bandwidths and carrier frequencies.
Innovation Solution
Implement an asymmetric bandwidth neighbor generator (ABNG) function that detects dissimilar channel assignments and generates supplemental neighbor lists, updating existing lists to facilitate seamless handovers during temporary reassignments, ensuring efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic channel reassignments are implemented to optimize spectrum utilization, then spectrum efficiency is improved, but handover reliability deteriorates due to undefined neighbor relationships for dissimilar channels
Solution Approach 1:
The system performs preliminary actions by pre-configuring neighbor relationship rules before channel reassignments occur. When a cell is reassigned to a dissimilar channel, the system proactively generates updated neighbor lists based on predefined mapping rules, ensuring handover readiness before service disruption can occur.
Solution Approach 2:
The invention introduces an intermediary mechanism (the neighbor list update function) that mediates between the dynamic channel reassignment process and the handover execution process. This intermediary generates and maintains updated neighbor lists that bridge the gap between dissimilar channel assignments and reliable handover execution.
2Adaptability or versatility
If neighbor lists are updated dynamically for each channel reassignment event, then handover capability is improved, but system complexity increases due to multiple neighbor list maintenance operations
Solution Approach 1:
The system implements a universal neighbor list update mechanism that handles multiple channel reassignment scenarios through a single unified process. The same function generates neighbor lists for various dissimilar channel combinations (different bandwidths, different carriers) without requiring separate specialized handling for each case.
Solution Approach 2:
The invention manages complexity by changing parameters in a controlled manner. Instead of maintaining completely separate neighbor lists for each channel configuration, the system updates existing neighbor list structures by modifying relevant parameters (channel numbers, bandwidths, carriers) according to the reassignment rules, reducing the number of distinct data structures needed.
Data Source
AI summary
Methods and apparatus for supporting handover via efficiently updating neighbor tables in response to a detected dissimilar channel assignment, e.g., a temporary PAL channel assignment to one or more cells in a network, are described. In various cases the newly assigned temporary PAL channel has a different bandwidth and/or a different carrier frequency than the original PAL channel. The content of neighbor tables is supplemented to reflect the temporary dissimilar assignment. After the temporary assignment ends the original neighbor tables are restored.