Centralized Call Management for Multi-SIM Conference Calls
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Solution Overview
Problem
Current multi-SIM multi-active terminals cannot perform centralized call management for user cards served by different networks, preventing conference calls across multiple networks.
Innovation Solution
A call management method and apparatus that registers multiple user cards with a centralized call management module, allowing the terminal to determine call statuses and adjust states for implementing conference calls by setting cards to waiting or conversation states, and managing service quality and roaming states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple independent control paths are used for each user card, then each user card can operate independently on different networks, but centralized call management across different networks cannot be achieved
Solution Approach 1:
The patent merges multiple independent control paths into a unified control architecture where a central controller coordinates call management across all user cards. This allows centralized call status determination and conference call implementation while maintaining independent network operation capability for each user card.
Solution Approach 2:
The patent introduces a central controller as an intermediary between the multiple user cards and the network. This mediator coordinates call management, determines call statuses across different networks, and enables conference calls by managing the interactions between multiple user cards without requiring changes to the independent control paths themselves.
2Adaptability or versatility
If a centralized call management module is implemented, then conference calls across multiple networks can be achieved, but the system complexity increases
Solution Approach 1:
The centralized call management module is designed with multi-functionality to handle various call scenarios including individual calls, conference calls, and cross-network coordination. By consolidating these functions into a single module, the patent achieves conference call capability across multiple networks without proportionally increasing system complexity.
Solution Approach 2:
The call management functionality is segmented into distinct modules including a central controller, call status determination unit, and user card management unit. This segmentation allows each component to perform specific functions efficiently, reducing overall system complexity while enabling centralized management and conference call capabilities.
3Measurement precision
If call statuses are determined independently for each user card, then real-time call status can be tracked, but cross-network call coordination cannot be achieved
Solution Approach 1:
The patent implements a feedback mechanism where the centralized call management module continuously determines and monitors call statuses of all user cards across different networks. This feedback loop enables real-time tracking of call statuses while allowing the central controller to coordinate cross-network calls and initiate conference calls based on the collected status information.
Solution Approach 2:
The system performs preliminary determination of call statuses for all user cards before initiating cross-network coordination or conference calls. This preliminary action allows the centralized controller to have complete visibility of call states across different networks, enabling it to make informed decisions about call coordination and conference call setup.
Data Source
AI summary
A call management method for a multi-subscriber identity module (SIM) multi-active terminal, where multiple user cards register with a centralized call management module of the multi-SIM multi-active terminal. The method includes, when a first user card is used for making a call or receiving a call, determining call statuses of the multiple user cards according to a connection list in the centralized call management module, where the connection list is used to record connection data of the multiple user cards; and when a second user card is in a conversation state, setting the first user card to a waiting state; or setting the first user card to a conversation state, and setting the second user card to a waiting state; or simultaneously setting the first user card and the second user card to a conversation state, to implement a conference call.