SIM Provisioning Over WiFi When RAN Activation Fails
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Solution Overview
Problem
Existing SIM provisioning methods rely on telephony RAN access, which can fail in scenarios where the subscriber device is out of range, lacks a Preferred Roaming List, or is not pre-programmed with an IP Multimedia Subsystem Public User Identity, preventing initial SIM activation.
Innovation Solution
Provisioning SIM credentials over a non-telephony network, such as WiFi, by establishing a data bearer path to a SIM OTA platform, receiving an SMS message containing CPS files, and installing them on the SIM card.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SIM provisioning is performed via RAN access, then the SIM card can be provisioned with CPS files through the mobile service provider network, but the provisioning fails when the subscriber device is out of range or unable to attach to any operator network
Solution Approach 1:
The patent introduces WiFi as an intermediary communication channel between the subscriber device and the OTA platform. Instead of relying solely on RAN access, the SIM provisioning application can establish a data bearer path through WiFi networks to receive CPS files. This intermediary approach resolves the contradiction by providing an alternative provisioning path when primary RAN access is unavailable, thereby improving reliability while maintaining adaptability to different network conditions.
2Ease of operation
If the SIM provisioning application waits for RAN access to obtain CPS files, then the provisioning process follows the standard telephony protocol, but the device cannot be activated when RAN access is unavailable
Solution Approach 1:
The patent implements a dynamic provisioning approach where the SIM provisioning application can adapt its operation mode based on available network conditions. The application first attempts standard RAN-based provisioning, and when that fails, it dynamically switches to using WiFi as an alternative data bearer path. This dynamic behavior maintains ease of operation by automating the selection process while significantly improving initial activation success rate by not being constrained to a single access method.
3Device complexity
If the device uses only telephony network access for SIM provisioning, then the provisioning process is straightforward and follows established protocols, but it lacks alternative paths when telephony access is unavailable
Solution Approach 1:
The patent makes the SIM provisioning application multi-functional by enabling it to operate through multiple types of network access. The application maintains compatibility with standard RAN-based provisioning while also gaining the capability to use WiFi networks as an alternative data bearer path. This universality allows the same provisioning application to function across different network types without increasing operational complexity for the user, while significantly enhancing adaptability to various network conditions.
Data Source
AI summary
A method for obtaining, at first activation of a SIM device, CPS files from a mobile service provider is provided. The method comprises establishing by an application stored on the SIM device before activation a WiFi connection to a core network of the mobile service provider, sending by the application via the WiFi connection a message to an OTA platform of the mobile service provider, the message comprising an identifier of the SIM device and a request for CPS files associated with the SIM device, receiving by the application a Short Message Service (SMS) message via the WiFi connection, the SMS message comprising the CPS files, and storing by the application the CPS files in the SIM device.