Dual-Mode Mobile Terminal Call Control Method
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Solution Overview
Problem
Dual-mode mobile terminals lack a method to effectively manage and control calls when receiving simultaneous calls from both synchronous CDMA and asynchronous GSM mobile communication systems.
Innovation Solution
A dual-mode mobile terminal with a key input unit and controller that allows users to switch between calls from synchronous and asynchronous systems, notifying users of incoming calls and enabling them to manage communication channels to respond to multiple calls simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-mode mobile terminal operates in both synchronous and asynchronous communication modes simultaneously, then the terminal can receive calls from both CDMA and GSM systems, but there is no method to control calls when receiving simultaneous calls from both systems
Solution Approach 1:
The call control method segments the handling of simultaneous calls from different systems by identifying the communication system (CDMA or GSM) for each incoming call and applying system-specific control procedures. The controller separates call management into distinct pathways for synchronous and asynchronous systems, enabling independent control of each call stream while maintaining overall system coordination.
2Productivity
If the terminal maintains communication channels for both systems, then users can communicate on both CDMA and GSM calls simultaneously, but the device complexity increases
Solution Approach 1:
The call control method implements dynamic channel management where the controller actively monitors incoming calls from both systems and dynamically allocates communication resources. The system can adaptively switch between maintaining separate communication channels and consolidating them based on current call states, user preferences, and system conditions, thereby managing complexity through flexible, state-dependent behavior rather than fixed structural complexity.
Data Source
AI summary
A dual-mode mobile terminal, which can access synchronous and asynchronous mobile communication systems, includes a key input panel and a controller. The key input panel includes a call switching key for switching between calls from the two systems and a call end key for ending calls from the two systems. While the terminal performs communication of one call received from one of the two systems in a general communication mode over a communication channel currently established by the one system, the controller determines whether an incoming call is received from the other system. If the incoming call is received, the controller notifies the user of receipt of the incoming call. If the call switching key is pressed, the controller prepares a communication environment for communication of the incoming call, allowing the user to perform the communication of the incoming call while maintaining the currently established communication channel.