Multi-USIM Network Switching with First-Network Notification

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Solution Overview

Problem

Multi-USIM terminal devices experience incorrect network performance recording when switching from one network to another without notifying the first network, leading to connection failures.

Innovation Solution

A method and system for a terminal device to request a network switch to a second network while maintaining a connection with the first network, using a timer to manage the switch process and transmit specific information to the first network.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the terminal device releases the connection with the first network without notifying the first network when switching to the second network, then the switching speed is improved, but the network performance recording accuracy deteriorates

Engineering Contradiction:

Improvenetwork switching speedVSAvoidnetwork performance recording accuracy

Core Design Contradiction:

SpeedVSMeasurement precision

Solution Approach 1:

The terminal device sends a notification message to the first network device before releasing the connection, in advance informing the network of the upcoming switch. This preliminary action allows the network to prepare and correctly record the performance data, resolving the contradiction by maintaining both fast switching and accurate recording.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If the terminal device maintains connection with the first network while switching to the second network, then the network performance recording accuracy is improved, but the device complexity increases

Engineering Contradiction:

Improvenetwork performance recording accuracyVSAvoidconnection management complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The terminal device extracts and sends only the essential notification information to the first network device, rather than maintaining full bidirectional communication. This extraction approach reduces the complexity of connection management while still achieving accurate network performance recording.

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If the terminal device sends a notification request to the first network device before switching, then the network performance recording accuracy is improved, but the switching time increases

Engineering Contradiction:

Improvenetwork performance recording accuracyVSAvoidnetwork switching time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The terminal device sends a concise notification message that allows the first network device to quickly process and respond, skipping unnecessary intermediate steps. This rushed-through approach minimizes the time penalty while ensuring accurate performance recording.

Inventive Principle:

Principle #21Skipping (Rushing through)

Data Source

PatentUS12610298B2Method, device and computer storage medium of communication during a switch among communication networks

Publication Date: 2026.04.21 NEC CORP

AI summary

Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A method of communication comprises determining, at a terminal device, whether a switch is to be performed from a first network device of a first communication network to a second network device of a second communication network, the first and second communication networks being associated with first and second identities of the terminal device respectively; and in response to determining that the switch is to be performed, transmitting, to the first network device, a request for the switch from the first network device to the second network device. In this way, the switch can be notified to the network side and network performance during the switch can be enhanced.