IMS Call Forking via D2D Registration for Unsubscribed Devices
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Solution Overview
Problem
Electronic devices not subscribed to an IMS service face challenges in receiving IMS-based calls when they are not registered with an IMS server, particularly when moving out of the server's coverage area, and devices like smartwatches cannot utilize IMS protocols without a separate server.
Innovation Solution
An electronic device connects with another device through device-to-device communication to register with an IMS server and process IMS-based calls, enabling call forking services without relying on a separate server, using an antenna module, short-range communication module, and processor to facilitate IMS registration and connection with external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an electronic device not subscribed to IMS service uses a separate server for call forking, then call transmission can be enabled, but the device cannot use IMS protocol when moving out of the server's coverage area
Solution Approach 1:
The subscribed electronic device acts as an intermediary between the unsubscribed device and the IMS server. The intermediary device performs IMS registration on behalf of the unsubscribed device and relays call signaling, enabling the unsubscribed device to access IMS services without direct server connection or separate infrastructure.
Solution Approach 2:
The subscribed electronic device serves multiple functions: it acts as both a regular IMS device and as a proxy server for unsubscribed devices. By leveraging its existing IMS registration and network connectivity, it provides call forking services to multiple devices without requiring them to have separate server infrastructure.
2Ease of operation
If a smartwatch connects through Bluetooth with a smartphone, then call transmission can be linked, but the smartwatch cannot be registered to the IMS server and cannot use IMS protocol
Solution Approach 1:
The smartphone acts as an intermediary that bridges the smartwatch and the IMS network. The smartphone maintains the IMS registration and handles all protocol-level communications with the network, while the smartwatch communicates calls through the established Bluetooth connection without needing direct IMS protocol support.
Solution Approach 2:
The subscribed device creates a virtual representation of the unsubscribed device's call capability through IMS registration. Instead of the smartwatch directly implementing IMS protocol, the smartphone replicates the registration function and manages the protocol stack, allowing the smartwatch to access IMS services indirectly.
3Reliability
If an electronic device registers with an IMS server directly, then IMS service can be used, but devices without subscription cannot receive IMS-based calls
Solution Approach 1:
The system merges the IMS registration capability of the subscribed device with the call reception needs of the unsubscribed device. By combining these functions in a single subscribed device, the system enables unsubscribed devices to receive IMS calls through the shared registration and network connection of the subscribed device.
Data Source
AI summary
According to various embodiments, an electronic device comprises at least one antenna module, at least one short-range communication module, at least one processor and a memory, wherein the memory can store instructions for allowing, during the execution thereof, the processor to: register the electronic device to an IP multimedia subsystem (IMS) server through the at least one antenna module; confirm a short-range communication method capable of a device to device (D2D) connection with at least one first external electronic device; connect, based on identification information about the first external electronic device, with the at least one first external electronic device through the at least one short-range communication module with the confirmed short-range communication method; and process an IMS registration with respect to the first external electronic device in response to an IMS registration request received from the first external electronic device through the at least one short-range communication module.