IMS Registration via 5G and 4G LTE Network Switching

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Solution Overview

Problem

In 5G communication systems, when a 5G network does not support IMS voice calls, electronic devices experience delays and connection failures due to callbacks to 4G LTE networks, leading to unstable voice call services.

Innovation Solution

An electronic device with a processor and antenna module that accesses both 5G and 4G LTE networks to register with an IMS network, ensuring voice call functionality by switching between networks if the initial registration fails, thereby maintaining call functionality without delay.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the electronic device uses 5G communication network for IMS voice call, then higher data rates and advanced communication services are achieved, but connection failures and delays occur when 5G network does not support IMS voice call

Engineering Contradiction:

Improvedata rateVSAvoidvoice call connection stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system dynamically changes the communication network parameter (5G to 4G) based on IMS voice call support availability. When 5G network does not support IMS voice call, the device switches to 4G LTE network, thereby maintaining reliable voice call connection while preserving high data rate capability when 5G is available

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system introduces an intermediary mechanism (network switching capability) between the device and the communication network. This intermediary allows the device to select between 5G and 4G networks based on IMS voice call support, resolving the contradiction between high data rate and connection stability

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the electronic device performs callback from 5G to 4G LTE network for IMS voice call, then voice call service is maintained, but call connection delay occurs

Engineering Contradiction:

Improvevoice call service availabilityVSAvoidcall connection delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary detection of IMS voice call support capability before initiating the call connection. By checking whether the 5G network supports IMS voice call in advance, the device can proactively select the appropriate network (4G LTE if 5G does not support IMS), thereby avoiding callback delays and reducing overall connection time

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11343287B2Electronic device and method for maintaining call function in electronic device

Publication Date: 2022.05.24 SAMSUNG ELECTRONICS CO LTD

AI summary

According to various embodiments, an electronic device may include at least one antenna module; and at least one processor configured to receive a communication service from a first communication network, a second communication network, and an IP multimedia subsystem (IMS) network via the at least one antenna module, wherein the at least one processor may be configured to: access the first communication network based on first identification information which corresponds to the first communication network, via the accessed first communication network, based on second identification information which corresponds to the IMS network, request the IMS network to register the electronic device, if registration request to the IMS network fails, access the second communication network, and request the IMS network to register the electronic device via the second communication network. Other various embodiments are possible.