SIM Profile Segmentation for IoT eUICC Download
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Solution Overview
Problem
The existing methods for downloading SIM card profiles onto embedded universal integrated circuit cards in IoT devices face challenges such as difficulty in connecting to telecom networks without prior subscription and inefficiencies in data transmission, leading to production delays due to high data transfer rates and reliability issues.
Innovation Solution
A system that produces SIM card profiles with a common static part and unique dynamic parts, encrypted using respective cryptographic keys, allowing for efficient batch processing and secure package generation for download onto embedded universal integrated circuit cards, reducing data transfer and enabling secure manipulation without decryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SIM card profiles are downloaded in full batches to ensure complete profile delivery, then profile delivery completeness is improved, but data transmission time and network load increase
Solution Approach 1:
The SIM card profile data is segmented into two distinct parts: a static part that remains common across multiple profiles and a dynamic part that varies between profiles. This segmentation allows the static part to be transmitted once and reused, while only the dynamic parts need to be transmitted for each individual profile, significantly reducing overall data transmission volume and time.
Solution Approach 2:
The static part of the SIM card profile is prepared and encrypted in advance using a common cryptographic key before the batch download process begins. This preliminary preparation allows the static content to be ready for efficient distribution, reducing the time required during the actual profile download operation.
2Productivity
If all SIM card profiles are transmitted in a single batch to improve production efficiency, then productivity is improved, but data transmission reliability decreases
Solution Approach 1:
By dividing the profile data into static and dynamic components, the system can transmit the large static portion once and the smaller dynamic portions individually. This segmentation maintains high productivity through batch processing of the static content while improving reliability by reducing the size and complexity of each individual transmission task.
Solution Approach 2:
The patent introduces an intermediary encryption mechanism using cryptographic keys to protect the static and dynamic parts during transmission. This intermediary layer ensures data integrity and security, improving transmission reliability without compromising the efficiency of batch processing.
3Reliability
If SIM card profiles are encrypted with individual cryptographic keys for maximum security, then security is improved, but data processing complexity and time increase
Solution Approach 1:
The encryption approach is segmented according to the data structure: the static part uses a common cryptographic key for all profiles, while only the dynamic parts use individual cryptographic keys. This segmentation maintains strong security for the variable information while simplifying the encryption process for the common information, reducing overall processing complexity.
Solution Approach 2:
The patent merges the encryption approach by combining the use of a common key for the static part with individual keys for dynamic parts. This unified approach allows the system to benefit from both simplified common encryption and secure individual encryption without the full complexity of individual encryption for all data.
4Loss of information
If complete SIM card profiles are transmitted to ensure no missing data, then data completeness is improved, but network bandwidth consumption increases
Solution Approach 1:
The profile data is segmented into static and dynamic parts, allowing the system to transmit the static portion once and only the necessary dynamic portions for each profile. This ensures data completeness by including all required elements while minimizing the total transmission volume by eliminating redundant static data repetition.
Data Source
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AI summary
According to one aspect, it is proposed a system comprising: - embedded universal integrated circuit cards, - afirst least one server (PM, SM-DP) configured to produce: • SIM card profiles, and • a batch of said SIM card profiles, the batch including at least one dynamic part of each SIM card profile and only one occurrence of said at least one static part, - another server (DM) configured to produce a SIM card profile package for each SIM card profile of said batch and to download the SIM card profile packages onto the embedded universal integrated circuit cards.