Implicit Registration Set for Multiple Mobile Directory Numbers
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Solution Overview
Problem
Existing methods for implementing multiple calling identities in mobile telephony require mobile devices to be 'burned' with multiple Subscriber Identity Modules (SIMs) or have them switched out, which is inefficient and inconvenient.
Innovation Solution
The implementation of implicit registration in IMS networks, where multiple Mobile Directory Numbers (MDNs) are linked within a single SIM, allowing calls to be routed through an Implicit Registration Set without altering the device or SIMs, enabling seamless switching between different calling identities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SIMs are burned into the mobile device or SIMs are switched out to implement multiple calling identities, then multiple calling identities can be supported, but the device complexity increases and operation becomes inconvenient
Solution Approach 1:
The patent enables a single SIM card to perform multiple functions by supporting multiple Mobile Directory Numbers (MDNs) within one SIM. The system allows a subscriber to have multiple calling identities (personal and corporate) associated with a single SIM, eliminating the need to physically switch between multiple SIM cards. This is achieved through the implicit registration mechanism that links multiple MDNs to one SIM identifier in the HSS database.
2Adaptability or versatility
If multiple SIMs are burned into the mobile device to implement multiple calling identities, then multiple calling identities can be supported, but the device complexity increases
Solution Approach 1:
The patent merges multiple calling identity functions into a single SIM card and single mobile device. Instead of requiring separate SIM cards or multiple identity modules, the system combines multiple MDNs under one SIM identifier. The implicit registration set in the HSS database consolidates the linkage between one SIM and multiple MDNs, reducing device complexity while maintaining multiple calling identity capabilities.
3Ease of operation
If implicit registration is implemented to allow multiple MDNs without SIM switching, then ease of operation improves, but the system complexity increases due to Implicit Registration Set management
Solution Approach 1:
The patent introduces an Implicit Registration Set (IRS) as an intermediary data structure in the HSS database that mediates between the SIM identifier and multiple MDNs. This IRS acts as a lookup table that automatically resolves which MDNs are associated with a given SIM without requiring complex device-side logic. The network infrastructure handles the complexity of managing multiple identities, while the mobile device simply benefits from seamless identity switching.
Data Source
AI summary
A network device receives a personal Mobile Directory Number (MDN) associated with an individual subscriber, wherein the individual subscriber is further associated with one or more subscriber devices. The network device receives an additional MDN assigned to the individual subscriber, and sends a notification, requesting the individual subscriber's acceptance of the additional MDN assigned to the individual subscriber, to at least one of the one or more subscriber devices. The network device receives, from one of the one or more subscriber devices, an acceptance of the additional MDN from the individual subscriber. The network device links the additional MDN, the personal MDN, and the one or more subscriber devices, within an Implicit Registration Set (IRS) at a Home Subscriber Server (HSS) in an Internet Protocol Multimedia Subsystem (IMS) network for routing calls to the individual subscriber's additional MDN or personal MDN at the one or more subscriber devices.