Terminal Call Handover Control for 5G SA Drop Prevention
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Solution Overview
Problem
The issue of call dropping during a call process between terminals due to network failures in 5G standalone (SA) networks is addressed.
Innovation Solution
A call method where a terminal maintains a connection with the current communication network by refraining from switching to a network with lower signal quality or ignoring network redirections, ensuring the call continues through the existing network connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the terminal switches to a network with higher signal quality during a call, then the signal quality is improved, but the call may drop due to network configuration issues
Solution Approach 1:
The terminal performs preliminary detection of network configuration parameters (second configuration parameter) before switching to a network with higher signal quality. This preliminary action prevents switching when the target network's configuration is invalid or incomplete, thereby avoiding call drops while still allowing switches to networks with both high signal quality and valid configurations.
2Reliability
If the terminal refrains from switching networks during a call, then the call stability is improved, but the signal quality may remain suboptimal
Solution Approach 1:
The terminal continuously monitors network signal quality and configuration parameter validity during calls. Based on this feedback, the terminal dynamically decides whether to switch networks: it refrains from switching when configuration parameters are invalid (preventing call drops) but allows switching when both signal quality and configuration validity are satisfactory (improving signal quality).
3Productivity
If the terminal automatically switches to a network with higher signal quality, then the communication quality is improved, but the call may be dropped due to invalid network configuration
Solution Approach 1:
The terminal performs preliminary validation of the second configuration parameter before executing a network switch. This preliminary check ensures that the target network has valid configuration parameters, preventing call drops while maintaining the ability to switch to networks with higher signal quality and valid configurations.
4Productivity
If the terminal uses network redirection to improve signal quality, then the communication performance is improved, but the call may drop due to improper redirection handling
Solution Approach 1:
The terminal performs preliminary detection of network configuration parameters before accepting network redirection. This preliminary action filters out invalid redirections that would cause call drops, while still allowing valid redirections to networks with higher signal quality and better communication performance.
Data Source
AI summary
This application provides a call method and a terminal, and relates to the field of communication technologies. In the method, during a call process between a first terminal and a second terminal, when signal quality of a second communication network is higher than signal quality of a first communication network and a second configuration parameter of a first bearer channel corresponding to the second communication network is invalid or does not exist, the first terminal maintains a connection with the first communication network through a first network device, to prevent the first terminal from switching to the second communication network to prevent the call from dropping.