UE Measurement Control via ANR Thresholds for Handover Reliability
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Solution Overview
Problem
Current cellular mobile communication systems lack a specific procedure for controlling user equipment (UE) to take and report measurements, leading to issues such as delayed handovers, increased cell load, poor signal quality, and call drops, especially in complex wireless environments like cities with dense buildings.
Innovation Solution
A method and system where a radio network controller (RNC) notifies UE to take automatic neighboring relationship (ANR) measurements with a specified threshold and instructs event reporting, allowing UE to measure and report results when pre-set conditions are met, enabling timely handover decisions and updates to neighboring cell configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If neighbor cell information is configured at network planning stage, then handover can be facilitated, but the neighbor cell information may not be updated in time when new cells are added or environment changes
Solution Approach 1:
The system enables automatic neighboring relationship (ANR) functionality where the network self-updates neighbor cell information based on UE measurement reports. The RNC automatically adds neighbor cells to the neighbor relation table when measurement results indicate new viable neighbors, eliminating manual configuration delays and keeping the neighbor cell list current without human intervention.
Solution Approach 2:
The system implements a feedback mechanism where UE continuously measures neighbor cells and reports measurement results to the RNC. The RNC uses this feedback information to dynamically update the neighbor cell configuration, ensuring that neighbor cell information reflects current wireless conditions and newly added cells in the network.
2Loss of information
If UE reports all measurement results, then complete neighbor cell information is obtained, but signaling overhead and network load increase
Solution Approach 1:
The system applies different reporting criteria to different measurement scenarios. Instead of uniform reporting, UE reports measurement results based on specific conditions such as when measurements exceed thresholds or when particular events occur. This selective reporting approach maintains information quality for critical cells while reducing unnecessary signaling for cells that don't impact handover decisions.
3Ease of manufacture
If manual neighbor cell configuration is used, then initial handover setup is simple, but the system cannot adapt to dynamic environment changes or new cell additions
Solution Approach 1:
The system transitions from static manual configuration to dynamic automatic configuration. The neighbor cell information is no longer fixed at network planning stage but dynamically updated based on real-time measurement reports from UEs. This allows the network to automatically adapt to environmental changes, new cell additions, and varying wireless conditions while maintaining operational simplicity through automated processes.
Data Source
AI summary
A method, device and system for controlling UE to take measurements are provided, the method comprising: an RNC notifying UE to take ANR measurements, and instructing UE with an ANR measurement threshold and that a reporting mode to be used by the UE is event reporting; the UE taking ANR measurements, and reporting a measurement result, wherein pre-set relationship is satisfied between the reported measurement result and the ANR measurement threshold. The technical solution presented in the disclosure solves the problem in the prior art of lack of specific procedure to control UE to report measurements, thereby acquiring the latest neighboring relationship in time, ensuring continuity of user calls, and enhancing the quality of service to users.