Dynamic Handover Thresholds for Wireless Network Interference
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Solution Overview
Problem
Current wireless network handover processes often occur too late to prevent poor performance, as they rely on continuous measurement reports and resource allocation, which can lead to suboptimal signal quality due to limited range issues with newer radio access technologies like 5G NR, especially in undesirable locations such as cell edges and overlapping sectors.
Innovation Solution
Implementing a system that dynamically sets handover thresholds based on sector power ratio and device location, allowing for proactive handovers to different sectors or radio access technologies without requiring actual performance measurements, thereby anticipating and mitigating interference and performance issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover decisions are made based on continuous measurement reports from wireless devices, then handover execution can be triggered, but signal quality is often already poor by the time handover occurs
Solution Approach 1:
The access node proactively identifies undesired locations using sector power ratio measurements and pre-calculates handover thresholds before signal quality deteriorates. This preliminary action allows the system to prepare handover decisions in advance, triggering handovers before the wireless device experiences poor signal quality, thus resolving the timing delay issue.
Solution Approach 2:
The system establishes buffer thresholds based on sector power ratios that anticipate potential signal quality degradation. By setting these thresholds beforehand and comparing them against measured ratios, the system creates a cushion that triggers handovers proactively, preventing poor signal quality rather than reacting to it after it occurs.
2Reliability
If continuous measurement reports and resource allocation are used for handover decisions, then handover triggering is possible, but resource blocks are heavily utilized
Solution Approach 1:
The invention extracts the handover decision-making function from the continuous measurement reporting process. Instead of relying on ongoing measurement reports that consume resource blocks, the access node uses sector power ratio measurements (which are already available for other purposes) to proactively identify undesired locations and determine handover thresholds, thereby eliminating the need for continuous measurement resources dedicated to handover decisions.
Solution Approach 2:
The system uses existing sector power ratio measurements, which are already being taken for network management purposes, to simultaneously drive handover decisions. This self-service approach allows the system to make handover decisions without requiring additional dedicated measurement resources, thus reducing overall resource block utilization while maintaining handover reliability.
3Speed
If newer radio access technologies like 5G NR are deployed to provide faster communications speeds, then additional resources and faster speeds are available, but range is limited compared to existing technologies
Solution Approach 1:
The system dynamically adjusts handover thresholds based on sector power ratios that reflect real-time signal conditions. This dynamic adjustment allows the network to optimize the balance between 5G NR and 4G LTE usage, enabling wireless devices to seamlessly transition between technologies based on their location and signal conditions, thereby extending effective coverage while maintaining high-speed connectivity where available.
Data Source
AI summary
Systems and methods are provided for setting handover thresholds and dynamically initiating handovers based on antenna parameters and wireless device location. A processor identifies an antenna having a sector power ratio exceeding a predefined threshold. Undesirable locations for wireless devices relative to the antenna are determined based on stored information and a first handover threshold is set for wireless devices served by the antenna and in undesirable locations. When a wireless device is found in the undesired location and the sector power ratio exceeds the predefined threshold, the first handover threshold is met. A handover may be initiated.