Wireless Cell Outage Mitigation via Automatic Coverage Adjustment
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Solution Overview
Problem
Cell outages in wireless communication systems disrupt network services and require manual intervention for mitigation, which is inefficient and can lead to service interruptions.
Innovation Solution
Implementing automatic cell status message monitoring and communication between base stations to adjust coverage areas of existing cells to compensate for disabled cells, without manual operator intervention, using inter-base station interfaces like the X2 interface or within a radio network controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual operator intervention is used to mitigate cell outages, then cell outage can be addressed, but service interruptions occur and efficiency is reduced
Solution Approach 1:
The system performs preliminary actions by proactively identifying cells at risk of outage through monitoring indicators such as high error rates or low signal quality. Before actual outage occurs, the system pre-configures alternative cell configurations and prepares handover procedures, ensuring immediate response when outage occurs without waiting for manual intervention.
Solution Approach 2:
The system enables self-service by implementing automatic detection, decision-making, and execution mechanisms. The network automatically monitors cell status, identifies outages, determines appropriate mitigation actions, and executes reconfiguration or handover procedures without human intervention, making the system self-healing and continuously operational.
2Reliability
If manual base station reconfiguration is performed to cover disabled cells, then coverage can be restored, but the process is inefficient and requires operator intervention
Solution Approach 1:
The base station implements self-service by automatically detecting neighboring cell outages, evaluating its own capacity to provide alternative coverage, and autonomously reconfiguring its antenna patterns or power levels to cover the disabled cell area, eliminating the need for operator intervention in the reconfiguration process.
Solution Approach 2:
The system employs feedback mechanisms where base stations continuously exchange status information about cell coverage and quality. When a cell outage is detected, neighboring base stations receive feedback about the outage condition and automatically adjust their configurations based on this feedback, creating a closed-loop system that continuously optimizes coverage.
3Measurement precision
If neighbor lists are updated manually when cells are added or deleted, then neighbor list accuracy is maintained, but network management complexity increases
Solution Approach 1:
The system enables self-service in neighbor list management by allowing base stations to automatically detect when neighboring cells are added or deleted through continuous monitoring of cell signals. The base stations autonomously update their neighbor lists based on detected changes, eliminating manual updates and reducing management complexity while maintaining high accuracy.
Solution Approach 2:
The system maintains continuous monitoring of the radio environment, ensuring that neighbor list information is constantly updated and refreshed. This continuous action ensures that neighbor lists remain accurate without requiring periodic manual interventions, as the system continuously adapts to network changes automatically.
Data Source
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AI summary
Cell outage within a wireless communication network is automatically mitigated. This way, neither manual operator intervention nor manual base station reconfiguration is needed to cover problematic cells. Quality of wireless services provided by the network improves when cell outage is automatically mitigated. In one embodiment, cell outage is mitigated in a wireless communication network by automatically communicating cell status messages between radio base stations or within a node that controls the radio base stations (300) indicating whether one or more cells within the network are currently disabled or expected to be disabled. The coverage area of one or more preexisting cells is modified to cover those cells which are currently disabled or expected to be disabled as indicated by the cell status messages (302). The inter-base station interface can also be used to send messages directly between the base stations indicating addition of new cells or deletion of preexisting cells.