Network Switching for Wi-Fi-Assisted VoLTE Call Reliability
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Solution Overview
Problem
In the early stage of 5G SA construction, voice communication based on EPS Fallback has a higher failure rate compared to VoLTE, necessitating a balance between voice communication success rate and data transmission rate.
Innovation Solution
Disabling the 5G SA mode when Wi-Fi is available and the signal strength is high, allowing the device to register in a 4G network for VoLTE communication, thereby avoiding EPS Fallback and ensuring good Internet access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the device uses 5G SA mode for data communication, then the data transmission rate is improved, but the voice communication success rate deteriorates due to EPS Fallback requirements
Solution Approach 1:
The patent dynamically switches the network registration mode between 5G SA and 4G LTE based on real-time conditions. When Wi-Fi is available and signal strength is sufficient, the device disables 5G SA mode and registers on 4G LTE network, enabling VoLTE for reliable voice communication while maintaining good Internet access through Wi-Fi. This dynamic adaptation resolves the contradiction by adjusting the network mode according to environmental conditions.
Solution Approach 2:
The patent changes the network registration parameter from 5G SA to 4G LTE by disabling 5G SA mode when specific conditions are met (Wi-Fi available, signal strength above threshold). This parameter change allows the device to use VoLTE for voice calls, improving voice communication success rate while maintaining data communication capabilities through Wi-Fi.
2Reliability
If the device disables 5G SA mode to use VoLTE, then the voice communication success rate is improved, but the data transmission rate deteriorates
Solution Approach 1:
The patent makes the device capable of using multiple communication channels simultaneously: Wi-Fi for data communication and 4G LTE for voice communication. By disabling 5G SA mode and registering on 4G LTE, the device uses VoLTE for reliable voice calls while relying on Wi-Fi for high-speed data transmission, thus achieving both high voice success rate and good data transmission performance through multi-functional usage.
Solution Approach 2:
The patent segments the communication functions by separating voice communication and data communication into different networks. Voice communication is handled by 4G LTE (VoLTE) ensuring high success rate, while data communication is handled by Wi-Fi ensuring high transmission rate. This functional segmentation resolves the contradiction by assigning different optimization goals to different communication types.
3Adaptability or versatility
If the device uses EPS Fallback for voice calls, then 5G SA mode can be maintained, but the voice call failure rate increases
Solution Approach 1:
Instead of maintaining 5G SA mode and using EPS Fallback (which causes high failure rates), the patent inverts the approach by disabling 5G SA mode and directly using 4G LTE with VoLTE. This inversion eliminates the need for fallback procedures and directly provides reliable voice communication, resolving the contradiction by reversing the traditional 5G-first approach.
Data Source
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AI summary
Embodiments of this application provide a communications method and an electronic device. In the communications method, the electronic device registers in 5G SA, and when a Wi-Fi status of the electronic device changes, if Wi-Fi is available and a Wi-Fi signal strength is good, a 5G SA mode of the electronic device is disabled, so that the electronic device does not register in a 5G mobile communications network. Then, the electronic device may register in a 4G mobile communications network. In this case, the electronic device can establish a voice call through VoLTE, thereby avoiding Eps fallback type voice communication. In this way, a success rate of the voice call can be ensured, and a user can have good Internet access experience based on WI-FI communication.