Terminal Network Switching via Preliminary Synchronization

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Solution Overview

Problem

Current radiocommunications terminal switching processes from one network to another are time-consuming and energy-intensive, particularly in emergency call scenarios, due to the need for extensive steps like extraction, reading, synchronization, and registration, and existing solutions like Dual SIM Dual Standby are complex and consume high energy.

Innovation Solution

A method that performs preliminary and partial synchronization with a second radiocommunications network, allowing for accelerated switching by anticipating complete synchronization and registration, with steps including frequency scanning and time-frequency synchronization, and periodic updating to reduce energy consumption and improve reactivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If traditional switching process is used (extraction, reading, synchronization, registration steps), then network switching is achieved, but switching time is excessive and energy consumption is high

Engineering Contradiction:

Improveswitching speedVSAvoidswitching time

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The terminal performs preliminary synchronization with the second network before an emergency call is actually needed. This advance action pre-establishes synchronization parameters and connection profiles, so that when switching is triggered, the terminal can skip the time-consuming synchronization steps and proceed directly to registration and call establishment, dramatically reducing switching time

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts and separates the synchronization process from the registration process. By taking out synchronization as a preliminary action that can be performed independently and in advance, the terminal prepares synchronization parameters beforehand, allowing the actual switching to focus only on registration and call setup, thereby reducing the critical path time for emergency switching

Inventive Principle:

Principle #2Taking out (Extraction)

2Speed

If traditional switching process is used (extraction, reading, synchronization, registration steps), then network switching is achieved, but energy consumption is excessive

Engineering Contradiction:

Improveswitching speedVSAvoidenergy consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal periodically updates synchronization parameters with the second network at predetermined intervals rather than continuously maintaining full connection. This periodic updating approach keeps the terminal ready for fast switching while consuming minimal energy during idle periods, as the terminal can enter low-power states between update cycles

Inventive Principle:

Principle #19Periodic action

3Adaptability or versatility

If Dual SIM Dual Standby solution is used, then network switching capability is achieved, but device complexity and energy consumption increase

Engineering Contradiction:

Improvenetwork switching capabilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The terminal uses a single SIM card that contains multiple connection profiles for different networks, rather than requiring separate SIM cards for each network. This universal approach allows the terminal to switch between networks by selecting different profiles from the same card, reducing hardware complexity while maintaining multi-network capability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the functionality of multiple network connections into a single SIM card with multiple profiles. By combining what would traditionally require separate physical cards into one unified card with selectable profiles, the terminal achieves multi-network adaptability without the hardware complexity of multiple SIM slots and associated management infrastructure

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9635532B2Method for switching a terminal over from a first radiocommunications network to a second radiocommunications network, corresponding computer program product, storage means and terminal

Publication Date: 2017.04.25 SIERRA WIRELESS SA

AI summary

A method is proposed for switching a radiocommunications terminal from a first radiocommunications network, with which the terminal is synchronized and registered, to a second radiocommunications network. The terminal has first and second connection profiles associated respectively with the first and second radiocommunications networks. According to the method, the terminal performs the following steps: for the second connection profile, a preliminary and at least partial synchronization of the terminal with the second radiocommunications network; and upon a switching request: a complete synchronization, based on said preliminary and at least partial synchronization, of the terminal with the second radiocommunications network; and registration of the terminal with the second radiocommunications network.