Vehicle-to-Mobile Call Transfer with Near-Field Disconnection
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Solution Overview
Problem
Existing call transfer methods between vehicle communication modules and mobile devices can cause user confusion and inconvenience due to simultaneous ringing of devices with the same call number, especially when transitioning from a vehicle eSIM to a mobile phone.
Innovation Solution
A method involving a wireless near-field connection, such as Bluetooth, is used to temporarily deactivate the connection when a call is transferred from a vehicle communication module to a mobile terminal, ensuring the incoming call is not superimposed on the existing call, and the same call number is maintained across both modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless near-field connection is maintained during call transfer, then the user can keep using the vehicle communication module, but the incoming call will be superimposed on the existing call causing user confusion
Solution Approach 1:
The system performs preliminary actions by detecting the call transfer scenario before the actual transfer occurs, and proactively suspends the wireless near-field connection in advance. This prevents the harmful effect of simultaneous ringing before it can happen, ensuring a smooth transition without user confusion while maintaining call transfer reliability
2Ease of operation
If the wireless near-field connection is deactivated during call transfer, then overlapping calls are prevented, but the connection between vehicle and mobile device is interrupted
Solution Approach 1:
The wireless near-field connection is made dynamic rather than static. The system automatically adjusts the connection state based on the call transfer scenario: suspended during the transfer process to prevent overlapping calls, and automatically restored after transfer completion to maintain connectivity. This dynamic adjustment resolves the contradiction between preventing overlapping calls and maintaining connection stability
Solution Approach 2:
The connection suspension and restoration follows a periodic pattern tied to the call transfer process. The connection is temporarily suspended during the critical transfer window and then restored in the subsequent period. This time-based control ensures call transfer clarity while minimizing the duration of connection interruption
3Loss of information
If both devices ring simultaneously with the same call number, then all user devices are notified, but the user experiences confusion and problems inside the vehicle
Solution Approach 1:
The harmful effect of simultaneous ringing is extracted and eliminated by suspending the wireless near-field connection during call transfer. This prevents the vehicle communication module from receiving and responding to the incoming call while the mobile device is already handling it, ensuring complete call notification through the mobile device without the harmful duplication that causes user confusion
Data Source
AI summary
A method for transferring a call, including: receiving an instruction to transfer a call from a first communication module to a second communication module of a mobile terminal, wherein the first communication module is connected via a wireless near-field connection to the mobile terminal, and wherein the first communication module has a first communication profile of a user, and the second communication module has a second communication profile of the user; deactivating the wireless near-field connection; and transferring the call from the first communication module to the second communication module of the mobile terminal.