Cross-SIM Calling Control for DSDS Reachability and Power Use
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Solution Overview
Problem
Conventional Dual SIM Dual Standby (DSDS) devices face issues with limited connectivity and high power consumption when cross-SIM calling is enabled, leading to missed calls and poor user experience.
Innovation Solution
A method and system for managing communication in user equipment (UE) with multiple SIMs, enabling cross-SIM calling only when required by detecting Internet Protocol Multimedia Subsystem (IMS) events using machine learning models to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cross-SIM calling is enabled to allow both SIMs to remain reachable, then connectivity and user experience are improved, but power consumption increases excessively
Solution Approach 1:
The system dynamically adjusts the operational state of SIM cards based on real-time conditions. When SIM1 is active for a call, SIM2 transitions to standby mode with limited connectivity. The system monitors call states and automatically switches between SIMs as needed, optimizing power consumption while maintaining connectivity when necessary
Solution Approach 2:
The system changes the operational parameters of SIM cards based on current usage patterns. During active calls on one SIM, the other SIM's connectivity parameters are adjusted to reduce power consumption. The system modifies registration states, data connection usage, and call acceptance parameters dynamically based on the active SIM's state
2Reliability
If cross-SIM calling is enabled to allow incoming calls on inactive SIM, then call reachability is improved, but device complexity increases
Solution Approach 1:
The system implements a unified call management mechanism that handles multiple SIMs through a single set of control logic. The same transceiver and antenna resources are used for both SIMs, and the system provides universal call handling capabilities across different SIM states through centralized control
Solution Approach 2:
The system introduces a call management intermediary that coordinates between the active and inactive SIMs. This intermediary layer handles the complexity of cross-SIM calling by managing state transitions, resource allocation, and call routing without requiring separate complex control systems for each SIM
3Volume of moving object
If conventional DSDS is used to enable two SIMs in one device, then device portability is improved, but connectivity of inactive SIM deteriorates
Solution Approach 1:
The system implements periodic monitoring and state switching between SIMs. During standby mode, the inactive SIM periodically checks for incoming calls and maintains minimal network registration. The system alternates between active and standby states, ensuring that the inactive SIM remains reachable while conserving resources
Solution Approach 2:
The system performs preliminary actions to maintain the inactive SIM's connectivity by keeping it registered on the network with minimal power consumption. The inactive SIM maintains data connection capabilities and periodic network updates before being needed, ensuring quick reactivation without full re-registration delays
Data Source
AI summary
A method performed by a user equipment (UE) having a plurality of subscriber identity modules (SIMs) comprising a first SIM and a second SIM, includes: performing a connection establishment procedure for a first call associated with the first SIM; detecting, while the first call is provided on the first SIM, an internet protocol multimedia subsystem (IMS) event associated with the second SIM; and based on the detecting the IMS event, enabling a cross-SIM calling for the second SIM based on information associated with the IMS event.