5G Mode Switching Based on IMS Registration and Coverage
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Solution Overview
Problem
Call dropping during handover from VoLTE or VoWiFi to 5G NR is attributed to RTP packet dropping, and 5G NR Stand-Alone mode leads to increased battery consumption and potential service interruptions.
Innovation Solution
A computing system selectively enables or disables 5G NR Stand-Alone mode based on IMS registration status, cellular coverage, and device conditions such as battery level, WiFi availability, and active call sessions to mitigate call dropping and conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a user equipment supports both 5G NR and E-UTRA radio technologies, then the device can access both 5G and 4G networks, but the device complexity increases due to multiple radio transceivers and protocol stacks
Solution Approach 1:
The patent implements dynamic switching between 5G NR and E-UTRA radio technologies based on network availability, signal quality, and service requirements. The radio resource manager dynamically selects which radio access technology to use for uplink transmissions, allowing the device to adapt to changing network conditions without maintaining simultaneous active connections to both networks, thereby reducing operational complexity while maintaining versatility
Solution Approach 2:
The patent creates a unified radio resource management framework that handles both 5G NR and E-UTRA technologies through a single management entity. This universal management approach consolidates control functions, shared resources, and common protocol handling for both radio technologies, reducing overall device complexity while maintaining support for multiple network types
2Reliability
If the network switches from 5G NR to E-UTRA for uplink transmission, then coverage and reliability are improved, but the spectral efficiency and data rate may be reduced
Solution Approach 1:
The patent implements dynamic switching between 5G NR and E-UTRA based on real-time assessment of network conditions, signal quality, and service requirements. When 5G NR provides sufficient reliability, it is used for high-data-rate applications. When coverage or reliability becomes problematic, the system dynamically switches to E-UTRA, ensuring continuous reliable connectivity while optimizing data rates based on current network conditions
Solution Approach 2:
The patent changes the radio access technology parameter dynamically based on network conditions. The radio resource manager monitors signal quality, network load, and service requirements, then adjusts the selected radio technology (5G NR or E-UTRA) to optimize the balance between reliability and data rate. This parameter change allows the system to adapt to varying conditions and maintain optimal performance
3Measurement precision
If the device continuously monitors both 5G NR and E-UTRA networks, then network selection accuracy is improved, but the energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring of 5G NR and E-UTRA networks at scheduled intervals rather than continuous monitoring. The radio resource manager periodically assesses network availability, signal quality, and suitability for uplink transmission. This periodic approach maintains adequate network selection accuracy while significantly reducing energy consumption compared to continuous monitoring
Solution Approach 2:
The patent implements dynamic monitoring strategies that adjust the intensity and frequency of network monitoring based on current conditions. When the device is actively transmitting or when network conditions are uncertain, monitoring is intensified. During periods of stable connectivity or low activity, monitoring is reduced or suspended, optimizing the balance between selection accuracy and energy consumption
Data Source
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AI summary
Systems and methods are provided for determining a status of an Internet Protocol Multimedia Subsystem registration on a device, determining an extent of cellular coverage for the device, and selectively disabling a Fifth Generation mode of the device based on the status of the IMS registration or the extent of cellular coverage.