QoS-Based Handover in Overlay Mobile Networks
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Solution Overview
Problem
In overlay mobile communication networks, existing methods fail to seamlessly handover users to the optimum network that meets Quality of Service (QoS) requirements, leading to potential service disruptions and inefficient resource allocation.
Innovation Solution
A method that involves a mobile communication terminal and network system capable of detecting signal intensity and QoS requirements for multiple services, determining the most suitable network for handover based on these criteria, and requesting a seamless switch to a base station providing the optimal network for each service, ensuring continuous and high-quality service delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing handover methods are used in overlay networks, then handover can be performed between networks, but the handover cannot ensure optimal QoS matching and may cause service disruptions
Solution Approach 1:
The patent changes the handover decision parameters from simple signal strength comparison to multi-dimensional evaluation including QoS requirements, network capabilities, and service quality metrics. This enables the system to select target networks based on comprehensive parameter matching rather than single-criterion decisions, resolving the contradiction between service continuity and QoS adaptability
Solution Approach 2:
The system dynamically adjusts handover decisions based on real-time QoS requirements and network conditions. Instead of static handover thresholds, the patent implements dynamic evaluation that adapts to changing service demands and network states, ensuring both reliable service continuity and optimal QoS matching throughout the handover process
2Ease of operation
If network selection is based on signal intensity only, then handover decision is simple, but the selected network may not meet QoS requirements
Solution Approach 1:
The patent segments the handover decision process into distinct evaluation stages: QoS requirement analysis, network capability assessment, and composite scoring. This structured segmentation maintains operational simplicity while incorporating multiple QoS dimensions, allowing the system to evaluate networks comprehensively without overwhelming complexity
Solution Approach 2:
The system transforms the single parameter of signal intensity into multiple evaluation parameters including QoS metrics, network capacity, and service quality indicators. This parameter expansion enables reliable QoS satisfaction while maintaining ease of operation through automated multi-criterion evaluation algorithms
3Reliability
If handover is performed frequently to maintain optimal QoS, then service quality improves, but network switching overhead and service interruptions increase
Solution Approach 1:
The patent implements partial handover where only specific services or service components are transferred to optimized networks rather than forcing complete terminal handover. This selective approach maintains service quality for critical applications while reducing unnecessary full-handover operations, thereby minimizing switching overhead and service interruptions
Solution Approach 2:
The system dynamically determines handover frequency and scope based on service priority, QoS degradation thresholds, and network conditions. By adjusting handover aggressiveness according to real-time requirements, the system optimizes service quality while avoiding excessive handovers that would increase switching time and interruptions
Data Source
AI summary
A method of performing handover in a mobile communication network, a mobile communication terminal using the same, and a mobile network system are provided. The method of performing handover in a mobile communication network includes: receiving QoS requirement on a mobile service basis from a user terminal; determining a most suitable mobile network to QoS requirement of a mobile service as a network for handover; and requesting handover to a base station of a mobile network determined as a network for handover. Therefore, in consideration of characteristics of a mobile network and a quality of a service used by a user, by determining handover to an optimum mobile network on a service quality basis, service interruption due to performing unnecessary handover can be prevented and by effectively distributing traffic of a mobile network, overload of a system can be prevented.