Wireless Terminal Call Fallback via Channel Thresholds
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Solution Overview
Problem
Current wireless communication systems face challenges in maintaining continuous voice services during transitions between different network generations, particularly in areas with varying channel quality, leading to potential call disruptions and poor call quality.
Innovation Solution
The implementation of a method for determining whether to perform a Voice over New Radio (VoNR) fallback to the 5G network based on channel quality thresholds, allowing seamless voice and video call services by switching from a 6G network to a 5G network when channel conditions are unfavorable, using AI-based voice synthesis technology to optimize data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the terminal operates on the 6G network for high-capacity communication, then communication capacity is improved, but call service reliability deteriorates in areas with poor channel quality
Solution Approach 1:
The terminal dynamically switches between 6G and 5G networks based on real-time channel quality conditions. When channel quality is good, the terminal operates on 6G to utilize high communication capacity. When channel quality deteriorates below a threshold, the terminal switches to 5G to maintain call service reliability, thus adapting system operation to changing conditions
Solution Approach 2:
The system changes the network operation parameter (network generation) based on channel quality parameters. By monitoring channel quality and comparing it against thresholds, the terminal adjusts its operating network from 6G to 5G or vice versa, optimizing both communication capacity and call service reliability under different channel conditions
2Reliability
If the terminal switches network frequently to maintain call quality, then call service reliability is improved, but system complexity increases
Solution Approach 1:
The network sends threshold information in advance to the terminal before switching is needed. The terminal uses these pre-provided thresholds to determine when to switch networks, avoiding the need for complex real-time decision algorithms and reducing switching complexity while maintaining call service continuity
Solution Approach 2:
The terminal autonomously determines whether to switch networks by comparing its measured channel quality against received threshold values. This self-service mechanism eliminates the need for complex centralized control or frequent network commands, simplifying the overall system while ensuring call service continuity through intelligent terminal-side decision-making
Data Source
AI summary
A method of operating a terminal in a wireless communication system may comprise receiving a paging message including information indicating a range of a threshold for determining whether to perform fallback for a call service from a first base station belonging to a first network, transmitting a request message requesting the fallback for the call service to the base station based on channel quality of the first base station being less than the threshold determined based on the information and transmitting a paging response message to a second base station belonging to a second network.