Mobile Terminal Secure Element Network Switch via Command Script
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Solution Overview
Problem
Existing methods for switching between mobile networks using secure elements like SIMs are cumbersome, especially in M2M communications where pre-provisioning subscription profiles is difficult, and confirmation of network switches can be challenging due to limitations in communication means like SMS availability.
Innovation Solution
A method involving a mobile terminal with a secure element that downloads a second subscription profile and a command script from a subscription management server, executes the script to switch networks, and confirms the switch through SMS messages, ensuring integrity and successful execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual SIM replacement is used for switching mobile networks, then network switching can be achieved, but the process becomes cumbersome and requires physical intervention
Solution Approach 1:
The patent replaces the mechanical process of physically removing and inserting SIM cards with an automated electronic process. The secure element downloads subscription profiles and executes command scripts remotely via download channel, eliminating the need for manual SIM card handling while achieving the same network switching function.
Solution Approach 2:
The secure element performs self-service by automatically downloading subscription profiles, executing command scripts, and confirming network attachment without requiring user intervention. The system autonomously manages the network switching process through automated profile installation and execution of switching commands.
2Ease of manufacture
If subscription profiles are pre-provisioned in secure elements for M2M devices, then network attachment is enabled, but the manufacturing process becomes more complex and costly
Solution Approach 1:
The patent applies preliminary action by downloading the command script and subscription profile to the secure element before actual network switching is needed. The secure element receives and stores the switching instructions in advance, so that when network switching is required, the device can execute the pre-prepared commands without requiring complex real-time provisioning during manufacturing.
Solution Approach 2:
The command script acts as an intermediary that bridges the gap between the subscription management server and the secure element. Instead of directly provisioning complex subscription profiles during manufacturing, the system uses the command script as an intermediate instruction set that guides the secure element through the profile installation process, simplifying the manufacturing workflow.
3Reliability
If SMS messages are used to confirm network switch completion, then confirmation can be achieved, but SMS availability may be limited or costly on the target network
Solution Approach 1:
The patent implements feedback by having the mobile terminal send a confirmation message back to the subscription management server after successfully executing the network switch. This feedback loop allows the server to verify whether the switching operation was successful and whether the terminal is properly attached to the target network, enabling reliable confirmation without relying solely on SMS.
Solution Approach 2:
The system uses SMS messages as a partial confirmation mechanism rather than the only confirmation method. The patent allows confirmation through multiple channels, using SMS when available but not requiring it for every confirmation scenario, thereby reducing communication costs while maintaining reliability through alternative confirmation paths.
Data Source
AI summary
A method for performing a switch from a first mobile network to a second mobile network by a mobile terminal comprising a secure element includes the following steps: attaching to the first mobile network using a first subscription profile; downloading a second subscription profile from a subscription management server including a command script defining a sequence of commands; attaching to the second mobile network; and executing the sequence of commands defined by the command script.