Network-Initiated SIM Switching for Seamless Operator Domain Transition
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Solution Overview
Problem
Existing multi-SIM approaches in communication networks require user-initiated switching between operator domains and are limited to pre-specified networks, lacking network-initiated switching capabilities and supporting only a few network selections.
Innovation Solution
A communication network-initiated method that allows automatic switching between operator domain subscriptions based on predefined criteria, utilizing a single UICC or eSIM with multiple USIM/ISIM configurations, where a network algorithm controls the activation and deactivation of USIM/ISIM pairs to switch between operator domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SIM cards are used to support multiple operator domains, then the terminal can access different networks, but the device complexity increases and user-initiated switching is required
Solution Approach 1:
The patent merges multiple SIM functionality into a single UICC by implementing multiple USIM applications on one card. This allows the terminal to support multiple operator domains without requiring multiple physical SIM slots, thereby reducing device complexity while maintaining the ability to access different networks.
Solution Approach 2:
The single UICC is designed to perform multiple functions by hosting different USIM applications, each corresponding to a different operator domain. This multi-functional approach eliminates the need for separate SIM cards for different networks, simplifying the device structure while preserving network access versatility.
2Ease of operation
If user-initiated switching between operator domains is implemented, then the user can select different networks, but the automation level is low and manual intervention is required
Solution Approach 1:
The system implements feedback mechanisms where the terminal monitors network conditions and automatically reports status to the network. The network then provides switching commands based on this feedback, enabling automatic switching without requiring manual user intervention while still maintaining user control through the ability to initiate switching requests.
Solution Approach 2:
The terminal is equipped with the capability to automatically monitor network conditions and initiate switching requests to the network when appropriate. This self-service approach reduces the need for continuous manual user intervention while maintaining user control over the switching process.
3Device complexity
If pre-specified network selections are provided, then the switching options are limited, but the device complexity is reduced
Solution Approach 1:
The system transitions from static pre-specified network selections to dynamic network selection. The terminal can automatically discover and register with multiple operator domains, and the network can dynamically provide switching commands based on current conditions. This dynamic approach increases the number of available network selections without significantly increasing device complexity.
Data Source
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AI summary
The present invention concerns a method for a communication terminal (3) in a communication network (1) for performing an operator domain subscription switching from a first operator domain subscription to a second operator domain subscription. The communication terminal (3) comprising a subscriber identity unit (5) comprising at least a first subscriber identity application (7) defining the first operator domain subscription for accessing a first operator domain (25), and a second subscriber identity application (7) defining the second operator domain subscription for accessing a second operator domain (25). The method comprises: the communication terminal (3) receiving a request from a network processing unit (19) located in the communication network (1) to switch the communication terminal (3) from using the first operator domain subscription to using the second operator domain subscription; the communication terminal (3) deactivating the first subscriber identity application (7); and the communication terminal (3) activating the second subscriber identity application (7) for communicating in the second operator domain (25).