Voice Quality Model for Wireless Handover Decisions
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Solution Overview
Problem
Communication systems face challenges in managing handovers between radio access networks (RANs) to ensure optimal voice quality and network resource utilization, particularly in scenarios where signal strength and voice quality vary across different RANs, leading to suboptimal user experience and network efficiency.
Innovation Solution
A method and system where mobile devices capture network performance information, apply a voice quality model to estimate the perceived quality of VoIP calls, and trigger handovers based on signal strength, voice quality, and priority rankings of competing RANs, allowing for intelligent handover decisions that prioritize voice quality and network resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover decisions are based solely on signal strength, then connection stability is improved, but voice quality deteriorates when the target RAN has poor voice service quality
Solution Approach 1:
The patent changes the handover decision parameters from solely signal strength-based to a composite evaluation that includes voice service quality metrics. The network device evaluates both the signal strength of candidate RANs and their voice service quality characteristics, then makes handover decisions based on this multi-parameter assessment, thereby preventing handovers to RANs with poor voice quality while maintaining connection stability.
2Productivity
If infrastructure expansion is implemented to reduce network load, then network capacity is improved, but cost increases
Solution Approach 1:
The patent enables the network to self-optimize load distribution by implementing intelligent handover management. The network device automatically evaluates voice service quality across different RANs and directs traffic to appropriate RANs based on real-time conditions, eliminating the need for costly infrastructure expansion to handle network load while maintaining or improving network capacity utilization.
3Reliability
If handovers are triggered frequently to maintain optimal signal strength, then connection reliability is improved, but network resource utilization deteriorates due to excessive handover signaling
Solution Approach 1:
The patent implements a feedback mechanism where the network device continuously monitors voice service quality metrics of candidate RANs and uses this feedback to modulate handover decisions. By incorporating voice quality feedback into the handover triggering conditions, the system avoids excessive handovers that would occur with signal strength-only thresholds, thereby reducing signaling overhead and improving network resource utilization while maintaining connection reliability.
Data Source
AI summary
Aspects of the subject disclosure may include, for example, a method, including applying a voice quality model to network performance information associated with a voice over internet protocol call session to generate a measure of voice quality associated with a first wireless radio access network wirelessly coupling a mobile device and a communication network, detecting a trigger condition for a measurement reporting according to the measure of voice quality, a first signal of the first wireless radio access network, and a second signal of a second wireless radio access network, and detecting a trigger condition for a measurement report according to the measure of voice quality, a first signal of the first network, and a second signal of a network. The measurement report can be transmitted to the first wireless radio access network responsive to detecting the trigger condition for the measurement reporting. Other embodiments are disclosed.