eSIM Terminal Cellular Network Connectivity Provisioning
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Solution Overview
Problem
Existing terminals without a SIM profile face challenges in acquiring Packet Data Network (PDN) or Packet Data Unit (PDU) connectivity to attach to an eSIM server through a cellular network, leading to difficulties in receiving normal cellular network services.
Innovation Solution
A method for a terminal with an eSIM to acquire PDN or PDU connectivity through a cellular network by checking for a Universal Integrated Circulated Card (UICC) profile, transmitting an attach request to a Public Land Mobile Network (PLMN), and receiving an attach response message, thereby enabling SIM profile provisioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal without a SIM profile attempts to attach to an eSIM server through a cellular network, then the terminal can receive normal cellular network services, but the terminal lacks PDN or PDU connectivity required for attaching to the eSIM server
Solution Approach 1:
The terminal performs preliminary actions by checking for the presence of a UICC profile before attempting to attach to the cellular network. If no profile exists, the terminal prepares an attach request message with appropriate indication information to trigger the network to provide temporary connectivity for profile download, thereby resolving the connectivity paradox before service reception can occur
Solution Approach 2:
The attach request message serves as an intermediary mechanism that communicates the terminal's profile status to the network. The indication information within this message acts as a mediator that triggers the network to provide temporary PDN or PDU connectivity, enabling the terminal to reach the eSIM server without having a permanent SIM profile installed
2Ease of operation
If a terminal uses pre-connected Wi-Fi or tethering methods to download SIM profile, then the terminal can acquire connectivity, but terminal costs increase and external connectivity is required
Solution Approach 1:
The terminal performs self-service by autonomously detecting its own profile status and initiating the appropriate attach procedure. The terminal uses its built-in eSIM capability to request temporary connectivity from the cellular network itself, eliminating the need for external Wi-Fi or tethering infrastructure and reducing device complexity
Solution Approach 2:
The cellular network is designed to perform multiple functions: it serves both as the ultimate service provider and as a temporary connectivity bridge for profile download. This multi-functionality eliminates the need for separate Wi-Fi or tethering systems, reducing terminal complexity while maintaining ease of operation
Data Source
AI summary
The present disclosure relates to a communication technique that combines a 5G communication system for supporting a data rate that is higher than that of a beyond 4G system with IoT technology, and a system thereof. The present disclosure may be applied to intelligent services on the basis of 5G communication technology and IoT related technology, such as smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety related services. Disclosed is a method for causing a cellular network itself to receive provisioning of a SIM profile to make it possible to use a normal cellular network service.