UE Roaming via Network Performance Metrics
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Solution Overview
Problem
Wireless user devices face challenges in efficiently roaming to alternative networks due to increased load on access nodes, leading to decreased data service quality, especially for premium services.
Innovation Solution
User Equipment (UE) determines network performance differentials by measuring signal strength and performance metrics such as throughput and error rate across candidate networks, and initiates a handover to the network with the largest performance differential, optimizing data service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless user devices roam based on signal strength alone, then connection availability is improved, but data service quality deteriorates due to network load
Solution Approach 1:
The patent changes the roaming decision parameter from signal strength alone to a composite metric that includes network performance indicators such as data throughput, error rate, and load conditions. This allows the system to select roaming networks that not only have strong signals but also deliver high-quality data services even under load.
Solution Approach 2:
The patent implements feedback mechanisms where the wireless device continuously monitors network performance metrics (throughput, error rate, load) of both home and candidate roaming networks. This feedback information is used to dynamically adjust roaming decisions, ensuring the device connects to networks that provide optimal data service quality rather than just signal strength.
2Adaptability or versatility
If wireless access nodes serve more user devices, then network coverage is improved, but service quality deteriorates due to increased load
Solution Approach 1:
The patent introduces dynamic network selection where the roaming decision is not static but continuously adapts to changing network conditions. The system dynamically evaluates multiple networks based on real-time performance metrics and adjusts connections accordingly, allowing the network to maintain service quality even as load increases across multiple access nodes.
3Reliability
If wireless user devices attach to available networks, then connectivity is improved, but roaming efficiency deteriorates due to suboptimal network selection
Solution Approach 1:
The patent applies preliminary action by having the wireless device proactively evaluate and measure network performance metrics of candidate roaming networks before actually attaching. By assessing throughput, error rates, and load conditions in advance, the device can make informed roaming decisions and attach directly to the most suitable network, avoiding unnecessary connection attempts and reducing roaming time.
Data Source
AI summary
A wireless user device selects wireless networks. The wireless user device determines signal strength for the wireless networks and identifies candidate ones of the wireless networks based on their signal strength. The wireless user device obtains performance information for the candidate wireless networks that comprises data throughput, error rate, band fading, and/or intermodulation. The wireless user device selects one of the candidate wireless networks based on the performance information. The wireless user device wirelessly exchanges data with the selected one of the candidate wireless networks.