eSIM Selection via Unique ID and Logical Channels
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Solution Overview
Problem
In a multiple eSIM environment, mobile devices face challenges in uniquely identifying and accessing specific eSIM content due to shared application identifiers and file identifiers, leading to conflicts when trying to access applications or files.
Innovation Solution
A special command is introduced that includes an identifier to uniquely select an eSIM, allowing the eUICC to activate or deactivate content, and logical channels are used to separate the access of eSIMs, enabling the mobile device to access specific eSIM content by managing eSIM IDs and AIDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple eSIMs are stored on the same eUICC to increase flexibility and reduce device complexity, then device flexibility and space are improved, but the ability to uniquely identify and access specific eSIM content deteriorates due to shared application identifiers and file identifiers
Solution Approach 1:
The patent segments the identification system into two levels: eSIM level identification using a new EF eSIM ID file with unique eSIM IDs, and application level identification using existing AIDs. This segmentation allows multiple eSIMs with shared AIDs to be uniquely distinguished by their eSIM IDs while maintaining backward compatibility with existing application identification mechanisms.
Solution Approach 2:
The patent introduces an intermediary identification layer (eSIM ID) between the eUICC and the application. This intermediary resolves the conflict by providing an additional level of uniqueness that bridges the gap between the shared AID space and the need for unique eSIM content access.
2Ease of operation
If existing protocols referencing only AID are used to access applications, then compatibility with legacy systems is maintained, but the ability to access applications in a multiple eSIM environment deteriorates due to identifier conflicts
Solution Approach 1:
The patent adds another dimension to the identification space by introducing eSIM IDs as a new layer above the existing AID dimension. This allows the system to maintain the original AID-based access protocol for legacy compatibility while adding a new identification dimension (eSIM ID) that enables unique access in multi-eSIM environments.
Solution Approach 2:
The patent performs preliminary identification of the target eSIM using the eSIM ID before accessing the application. This preliminary action resolves the identifier conflict by establishing the correct eSIM context before the application access protocol is executed, ensuring both legacy compatibility and multi-eSIM capability.
3Stability of the object's composition
If the same FID is used across multiple eSIMs to maintain consistency, then file structure consistency is improved, but the ability to access files in specific eSIMs deteriorates due to identifier ambiguity
Solution Approach 1:
The patent segments the file identification system into eSIM-level identification (eSIM ID) and file-level identification (FID). This segmentation allows the same FID to be used across multiple eSIMs for structural consistency while the eSIM ID provides the additional specificity needed for precise file access in the correct eSIM context.
Data Source
AI summary
Embodiments are described for identifying and accessing an electronic subscriber identity module (eSIM) and associated content of the eSIM in a multiple eSIM configuration. An embedded Universal Integrated Circuit Card (eUICC) can include multiple eSIMs, where each eSIM can include its own file structures and applications. Some embodiments include a processor of a mobile device transmitting a special command to the eUICC, including an identification that uniquely identifies an eSIM in the eUICC. After selecting the eSIM, the processor can access file structures and applications of the selected eSIM. The processor can then use existing commands to access content in the selected eSIM. The special command can direct the eUICC to activate or deactivate content associated with the selected eSIM. Other embodiments include an eUICC platform operating system interacting with eSIMs associated with logical channels to facilitate identification and access to file structures and applications of the eSIMs.