Per-IMSI APN OI Control for Regional VOLTE Suppression
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Solution Overview
Problem
Current systems do not allow for individual control of Voice-over-LTE (VOLTE) functionality for secondary International Mobile Subscriber Identifiers (IMSI) in Multiple IMSIs Multiple MSISDNs (MIMM) subscribers, as the settings are controlled by the primary IMSI, leading to inconsistent service provision across different geographic regions.
Innovation Solution
Implementing per-IMSI Access Point Name (APN) Operator Identifier (OI) Replacement Attribute Value Pair (AVP) Suppression attribute settings, allowing each IMSI to have its own settings and applying them based on the currently active IMSI, independent of the primary IMSI's settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If per-IMSI APN OI Replacement AVP parameters and Suppression attribute settings are implemented, then control precision over VOLTE functionality is improved, but system complexity increases
Solution Approach 1:
The patent segments the service control by implementing per-IMSI APN OI Replacement AVP parameters and Suppression attribute settings. Each IMSI can now have independent VOLTE control settings rather than being governed by a single primary IMSI configuration. This segmentation allows precise control over VOLTE functionality for each secondary IMSI based on geographic region, resolving the contradiction by improving control precision through differentiation while managing complexity through structured parameter organization.
Solution Approach 2:
The patent applies local quality by allowing different APN OI Replacement AVP parameters and Suppression attribute settings for different IMSIs associated with different geographic regions. Each IMSI receives customized service parameters appropriate to its specific region rather than a uniform global setting. This enables local optimization of VOLTE service provision while maintaining systematic control through the HSS database structure.
2Adaptability or versatility
If uniform service settings are applied across all IMSIs, then system simplicity is maintained, but service adaptability to different geographic regions deteriorates
Solution Approach 1:
The patent implements universality by designing a multi-functional parameter system where the HSS database can store and manage different types of service parameters (APN OI Replacement AVP parameters, Suppression attribute settings) for multiple IMSIs. The system universally supports both primary and secondary IMSIs with region-specific configurations, allowing the same infrastructure to serve diverse geographic regions with customized VOLTE settings without requiring separate systems for each region.
Data Source
AI summary
A method for applying per-International Mobile Subscriber Identification (IMSI) Access Point Name (APN) Operator Identifier (OI) replacement for Multiple IMSI Multiple Mobile Subscriber Integrated Service Digital Network (MSISDN) subscribers comprises receiving, at a home subscriber server of a cellular network, an identification of a currently active IMSI for a cellular device. The cellular device is associated with a cellular service subscriber having multiple IMSIs and multiple MSISDNs, the multiple IMSIs comprise a primary IMSI and one or more secondary IMSIs, and each of the IMSIs has an associated roaming COS that includes a roaming restriction policy that allows or suppresses Voice Over LTE (VOLTE). In response to the currently active IMSI for the cellular device being a secondary IMSI, the method comprises applying the roaming restriction policy specified in the roaming COS of the secondary IMSI regardless of the roaming COS of the primary IMSI.