VoNR Voice Signal Handover Without Data Signal Transfer
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Solution Overview
Problem
In Voice over Internet Protocol (VoNR) calls, existing technologies face challenges in maintaining reliable voice connectivity when user devices transition between different frequency bands and radio access technologies, leading to suboptimal handover processes that affect signal quality and data throughput.
Innovation Solution
A method and system that monitor key performance indicators (KPIs) for VoNR sessions, initiating a handover for the voice signal to a lower frequency band or different radio access technology without simultaneously handover the data signal, ensuring consistent and improved coverage by maintaining data signals on higher frequency bands for better data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network initiates handover for both voice and data signals simultaneously, then the handover process is simple and coordinated, but the voice signal quality deteriorates when transitioning between frequency bands
Solution Approach 1:
The patent segments the handover process into independent voice signal handover and data signal handover. The voice signal handover is triggered independently based on voice-specific KPIs (signal-to-noise ratio) when they deteriorate, while data signal handover is triggered separately based on data-specific conditions. This segmentation allows each signal type to be optimized for its specific quality requirements without forcing simultaneous handover of both signals.
Solution Approach 2:
The patent implements preliminary action by monitoring voice signal KPIs continuously and triggering voice signal handover before data signal handover when voice quality deteriorates. The network proactively initiates voice handover based on predicted voice quality thresholds, ensuring voice signal quality is maintained before the data signal experiences similar deterioration.
2Productivity
If the network maintains data signals on higher frequency bands, then data throughput is improved, but voice signal coverage is reduced when moving to lower frequency bands
Solution Approach 1:
The patent applies local quality by treating voice and data signals differently based on their specific quality requirements. Voice signals are monitored for voice-specific quality metrics (signal-to-noise ratio) and handover is triggered when voice quality deteriorates, while data signals are maintained on higher frequency bands for optimal data throughput. This allows each signal type to receive optimized treatment according to its local quality requirements.
3Reliability
If the network monitors multiple KPIs for voice and data signals separately, then signal quality optimization is improved, but the monitoring and control complexity increases
Solution Approach 1:
The patent implements separate KPI monitoring for voice and data signals, with voice-specific KPIs (signal-to-noise ratio) monitored independently from data-specific KPIs. This localized monitoring approach allows each signal type to be optimized based on its specific quality characteristics, with voice quality monitored for voice-related metrics and data quality monitored for data-related metrics, avoiding the complexity of monitoring all signals with a single unified set of KPIs.
Data Source
AI summary
Systems and methods are provided for improving quality and coverage of a VoNR session on a user device. When a user device is currently engaged in a VoNR session having a voice signal and a data signal, at least one KPI is monitored. The KPI is an indicator that can indicate the quality of the VoNR session, such as RSRP, RSRQ, SINR, or the like. A threshold for the KPI is determined. Once the threshold is met, a handover is initiated for the voice signal without initiating a handover for the data signal.