Conditional Forwarding for Multi-SIM Wireless Device Compatibility
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Solution Overview
Problem
There is a need for improved compatibility between cellular capable secondary wireless devices and primary wireless devices that include multiple subscriber identity modules (SIMs) to enable seamless access to different wireless networks and services, particularly when the secondary device is not in proximity to the primary device.
Innovation Solution
The solution involves conditional forwarding of page messages and SMS messages from one SIM to another via a relayed connection through the primary wireless device, allowing the secondary device to access services of both SIMs, even when not in proximity, by configuring the primary device to forward messages and suppress alert notifications, thereby ensuring continuous service availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secondary wireless device relies on proximity-based relayed connection through the primary device, then service availability is improved when paired, but service accessibility deteriorates when the secondary device is out of proximity
Solution Approach 1:
The patent introduces a conditional forwarding mechanism where the primary wireless device acts as an intermediary to forward page messages and SMS from the second SIM to the secondary device via the first SIM's network connection. This mediator approach enables the secondary device to access services of both SIMs even when out of proximity, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The system establishes conditional forwarding rules in advance during device pairing or through user configuration. When the secondary device is out of proximity, pre-configured forwarding rules automatically route incoming messages through the primary device's network connection, ensuring service continuity without requiring real-time proximity or manual intervention.
2Reliability
If the primary device forwards all page messages for the second SIM, then service continuity is improved, but battery consumption and notification overload worsen
Solution Approach 1:
Instead of forwarding all page messages unconditionally, the system implements selective conditional forwarding with thresholds. The primary device forwards only when the secondary device is confirmed out of proximity and being worn, and limits forwarding to a threshold number of messages. This partial action approach maintains service continuity while avoiding unnecessary energy consumption and notification overload.
Solution Approach 2:
The system continuously monitors proximity status and device state (e.g., being worn) to dynamically control message forwarding. Feedback from proximity sensors and device state information enables intelligent decision-making about whether to forward messages, optimizing the balance between service continuity and energy consumption.
3Adaptability or versatility
If the secondary device maintains cellular connection independently, then service accessibility is improved when out of proximity, but compatibility and seamless integration with the primary device deteriorate
Solution Approach 1:
The system dynamically switches between relayed connection mode (when in proximity) and conditional forwarding mode (when out of proximity). This dynamic adaptation allows the secondary device to maintain seamless integration with the primary device when paired, while independently accessing services when separated, resolving the contradiction between accessibility and integration.
Data Source
AI summary
Apparatus and methods to improve compatibility between a primary wireless device including multiple subscriber identity modules (SIMs) and a cellular capable secondary wireless device are disclosed. The cellular capable secondary wireless device pairs with the primary wireless device, which provides a configurable option to allow mobile terminated connections and/or messages to be received at the cellular capable secondary wireless device for multiple SIMs when the cellular capable secondary wireless device is not within proximity of the primary wireless device and is being worn. The primary wireless device indicates conditional forwarding to a second wireless network associated with a second SIM and adjusts notification alerts to reduce time for forwarding when the cellular capable secondary wireless device is separated from the primary wireless device and in use.