Wireless SIM Data Transfer for Voice Call Handling
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Solution Overview
Problem
Users with multiple communication terminals face cumbersome operations and high access fees due to the need to swap Subscriber Identity Module (SIM) cards between devices, and existing wireless SIM transfer technologies do not enable proper incoming call processing when the receiving terminal lacks voice call functionality.
Innovation Solution
A communication device with a transmitting unit for wireless transmission of subscriber information to a second device without a voice call function, a receiving unit for incoming call notifications, and a communication unit for voice data communication with the second device using predetermined wireless communication, allowing for voice call processing even when the receiving device cannot perform voice calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If subscriber information is wirelessly transmitted to a communication terminal without voice call function, then the receiving terminal can access the mobile network, but the receiving terminal cannot perform incoming call processing or voice call processing
Solution Approach 1:
The patent introduces a master terminal as an intermediary that has both mobile communication capability and voice call processing capability. When the slave terminal (without voice call function) receives subscriber information, it cannot handle voice calls independently. Instead, the master terminal acts as a mediator that receives incoming calls and forwards them to the slave terminal through wireless communication, enabling the slave terminal to participate in voice calls indirectly through the master terminal's capabilities
2Adaptability or versatility
If a user possesses multiple communication terminals, then the user can use different devices for different purposes, but the user must swap SIM cards or install multiple SIM cards resulting in troublesome operations and high access fees
Solution Approach 1:
The patent implements a copying mechanism where subscriber information (including IMSI, authentication keys, and profile data) is wirelessly transmitted from the master terminal to the slave terminal. This creates a digital copy of the SIM card's essential data in the slave terminal, allowing it to authenticate and access the mobile network without physically containing a SIM card, thereby eliminating the need for SIM card swapping or multiple SIM cards
Solution Approach 2:
The patent extracts the essential subscriber identification and authentication functions from the physical SIM card and transfers them as digital data (subscriber information) to the slave terminal. This separation allows the slave terminal to gain network access capabilities without needing the physical SIM card, simplifying multi-device usage by eliminating SIM card management overhead
3Reliability
If the wearable terminal receives subscriber information but cannot perform voice call processing, then the terminal can connect to the mobile network, but appropriate incoming call processing cannot be performed
Solution Approach 1:
The master terminal serves as an intermediary that handles incoming call processing. When a call arrives at the slave terminal's phone number, the master terminal receives the call through its mobile communication capability, processes the incoming call notification, and then communicates with the slave terminal wirelessly to establish the voice call connection, enabling proper incoming call handling despite the slave terminal's lack of native voice call functionality
Data Source
AI summary
A communication device includes a transmitting unit configured to transmit, to a second communication device having no voice call function, subscriber information through predetermined wireless communication without using a mobile communication network, a receiving unit configured to receive an incoming call notification message directed to a phone number in the subscriber information from the second communication device through the predetermined wireless communication, and a communication unit configured to communicate voice data with the second communication device by using the predetermined wireless communication upon receiving an incoming call notification message.