Blind Handover Triggering for Beamforming Devices
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Solution Overview
Problem
In cellular wireless networks, devices served by a distant access node may experience radio link failure due to poor channel conditions and RF obstructions, leading to loss of connectivity when they move into stronger coverage of a closer access node, as the distant node fails to receive measurement reports and initiate handover.
Innovation Solution
A computing system tracks geolocations where devices experience this issue and identifies a geolocation area where handovers from a distant access node to a closer one are needed, allowing for blind handover triggering without receiving measurement reports from the devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the access node waits for measurement reports from devices to trigger handover, then the handover decision is based on accurate device measurements, but the handover may be delayed or failed when devices move into stronger coverage of a closer access node
Solution Approach 1:
The system performs preliminary actions by identifying geolocation areas where handover failures occur and pre-configuring blind handover triggers. When a device enters such an area while being served by a distant access node, the handover is automatically triggered without waiting for measurement reports, thus preventing connectivity loss while maintaining accurate handover decisions through geolocation-based triggering.
2Reliability
If the system implements blind handover without measurement reports, then handover timing is improved and connectivity is maintained, but the handover may be triggered inappropriately without accurate channel condition information
Solution Approach 1:
The system applies local quality by implementing blind handover specifically in identified geolocation areas where failure patterns are known, rather than applying it universally. The handover trigger is localized to specific geographic regions with documented handover failures, allowing the system to maintain connectivity in problematic areas while preserving measurement-report-based handover in areas where it works reliably.
3Reliability
If the system tracks and analyzes past handover failures to identify geolocation areas, then blind handover can be strategically triggered, but the system complexity increases due to additional tracking and analysis requirements
Solution Approach 1:
The system implements self-service by automatically tracking device geolocations, analyzing handover failure patterns, and identifying problematic geolocation areas without requiring external intervention. The network infrastructure itself performs the analysis and configuration of blind handover triggers based on observed failure patterns, reducing the need for manual network optimization while improving handover reliability.
Data Source
AI summary
A method and system for blindly triggering handover based on past failures to trigger handover of beamforming-served devices. A computing system identifies a geolocation area where wireless communication devices (WCDs) that are served with beamforming by a first access node tend to experience radio link failure after having reported to the first access node being within threshold weak coverage of the first access node and threshold strong coverage of a second access node. And, based on the identifying, the computing system then blindly triggers handover of a given WCD from the first access node to the second access node in response to determining that the given WCD is served with beamforming by the first access node while positioned in the identified geolocation area.