Dual Standby Mobile Terminal Single Smart Card Buffer
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Solution Overview
Problem
Conventional dual standby mode mobile terminals require two smart card receivers, making them difficult to manufacture in a compact and slim design while increasing manufacturing costs.
Innovation Solution
A dual standby mode mobile terminal with a detachable dual mode smart card and a buffer for loading communication mode data, controlled by first and second control units, allowing the terminal to operate in both GSM and CDMA modes with a single smart card slot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two smart card receivers are used to support dual standby mode, then dual communication mode functionality is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The single smart card receiver is designed to handle multiple communication modes (GSM and CDMA) by loading different communication mode data into the buffer, making it a universal receiver that can serve dual purposes rather than requiring separate dedicated receivers for each mode
Solution Approach 2:
Communication mode data for both GSM and CDMA modes are pre-loaded into the buffer before actual communication operations begin, allowing the single smart card receiver to switch between modes without requiring physical card changes or additional receivers
2Adaptability or versatility
If two smart card receivers are used to support dual standby mode, then dual communication mode functionality is achieved, but manufacturing cost increases
Solution Approach 1:
The functions of two separate smart card receivers are merged into a single receiver that can handle both GSM and CDMA communication modes by loading appropriate communication mode data from the smart card into the buffer, reducing component count and manufacturing cost
3Adaptability or versatility
If two smart card receivers are used to support dual standby mode, then dual communication mode functionality is achieved, but terminal size increases
Solution Approach 1:
The single smart card receiver is designed as a multi-functional component that can handle both GSM and CDMA modes through data buffering, eliminating the need for duplicate receivers and reducing the overall terminal footprint
Data Source
AI summary
A dual standby mode mobile terminal having a single smart card slot and communication mode control method thereof is provided for enabling the mobile terminal to operate in dual standby mode with a single smart card. A dual standby mode mobile terminal includes a first control unit for controlling a first communication mode, a second control unit for controlling a second communication mode, a removable dual mode smart card containing first and second communication mode data, and a buffer for loading the first and second communication mode data. A communication mode control method for the dual standby mode mobile terminal includes loading the first and second communication mode data in the buffer from the dual mode smart card under the control of the first control unit, detecting an event requiring communication mode data provided by the dual mode smart card, determining whether the communication data are any of the first and second communication mode data loaded in the buffer, and executing the event using the communication mode data loaded in the buffer. The dual standby mode mobile terminal and communication mode control method thereof enables the mobile terminal to stand by in two different communication modes (e.g. GSM and CDMA modes) with a single smart card.