Dual SIM Mobile Terminal Single Baseband Dynamic Switching
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Solution Overview
Problem
Conventional dual SIM mobile terminals with a single baseband structure can only perform single talk or single standby, limiting communication quality and services, as they cannot concurrently manage both channels for dual SIM operations without manual SIM switching and power cycling.
Innovation Solution
A dual SIM mobile terminal with a single chipset and two RF units, enabling double standby and double talk by automatically switching between SIMs based on service requirements, network states, and user settings, using a SIM switch to manage primary and secondary SIMs connected to the same controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a single RF unit is used in a single baseband structure, then miniaturization and light weight of mobile terminals are achieved, but concurrent standby or transmission/reception for another channel (double standby) cannot be made during the same timeslot
Solution Approach 1:
The patent implements dynamic SIM switching mechanism where the system automatically switches between SIM cards based on service requirements and network states. The baseband controller dynamically allocates RF resources between different SIMs, enabling double standby capability where each SIM can independently monitor its network without requiring permanent dual RF unit allocation.
Solution Approach 2:
The single RF unit is designed to serve multiple SIM cards sequentially through rapid switching. The same RF hardware resources are universally utilized for both SIM A and SIM B, allowing one physical unit to perform the function of multiple channels through time-division multiplexing and dynamic resource allocation.
2Adaptability or versatility
If SIM switching between processors is implemented in conventional dual SIM structure, then service flexibility is improved, but manual configuration setting and power cycling are required to use packet services
Solution Approach 1:
The system implements automatic SIM switching based on service type detection. When packet services are required, the baseband controller automatically switches to the SIM card that supports packet services without requiring user intervention. The system self-monitors network states and service capabilities of each SIM, making intelligent decisions to maintain continuous service availability.
Solution Approach 2:
The patent incorporates feedback mechanisms where the system continuously monitors the operational state, network availability, and service capabilities of each SIM card. Based on this feedback information, the baseband controller dynamically adjusts SIM switching decisions to ensure optimal service delivery, automatically resolving service interruptions without user awareness.
3Device complexity
If a single baseband structure is used, then device complexity is reduced, but communication quality and services are limited to single talk or single standby
Solution Approach 1:
The system employs periodic switching between SIM cards at controlled intervals, allowing each SIM to alternate between active and standby states. This periodic action enables the single baseband to effectively support double standby by rapidly transitioning between SIMs, maintaining both channels available while using simplified hardware architecture.
Data Source
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AI summary
Disclosed herein is a dual SIM terminal and an operating method thereof for supporting dual standby and single talk using a single baseband. The dual SIM mobile terminal may include a controller which is a single chipset, a dual SIM, and two radio frequency (RF) units, thereby having an effect capable of providing a service at the same level as a dual SIM using two mobile terminals even with one mobile terminal. Furthermore, dual SIM switching is performed according to a state of the network, a pricing system, and a user's setting, thereby providing the user's desired service.