Dual Baseband Terminal for Simultaneous 3G+ Multi-SIM Support
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Solution Overview
Problem
Existing dual SIM mobile phones can only support one SIM card for 3G or 4G services while the other SIM card is limited to 2G services, preventing simultaneous support of 3G or 4G services for multiple SIM cards.
Innovation Solution
A terminal device with two baseband processors and radio frequency chips, each connected to separate SIM card slots, allowing simultaneous support of 3G or later-generation services by configuring multiple channels for data transmission between the processors and antennas, enabling both SIM cards to perform 3G or later-generation mobile communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single baseband processor and radio frequency chip are used, then device complexity is reduced, but only one SIM card can support 3G or 4G services while the other is limited to 2G services
Solution Approach 1:
The patent divides the baseband processing function into two independent baseband processors (first baseband processor and second baseband processor), each capable of independently processing signals for different SIM cards. This segmentation allows each processor to handle 3G or 4G services independently, resolving the contradiction between supporting multiple service generations and maintaining device complexity at acceptable levels.
Solution Approach 2:
Each baseband processor and radio frequency chip is designed with multi-functionality to support both 2G and 3G/4G services. The first baseband processor can handle services for the first SIM card across multiple generations, and the second baseband processor does the same for the second SIM card, making the system universally compatible while enabling simultaneous 3G/4G support for both cards.
2Reliability
If separate channels are allocated for each SIM card, then communication reliability is improved, but device complexity increases due to multiple baseband processors and radio frequency chips
Solution Approach 1:
The patent segments the communication system into two independent processing chains: first SIM card → first baseband processor → first radio frequency chip → first antenna, and second SIM card → second baseband processor → second radio frequency chip → second antenna. This segmentation ensures that each SIM card has its own dedicated processing path, improving communication reliability while keeping the complexity manageable through modular design.
3Productivity
If multiple baseband processors and radio frequency chips are used, then data transmission rate is improved, but manufacturing cost increases
Solution Approach 1:
By segmenting the system into two independent baseband processors and radio frequency chips, each processing channel can operate at full 3G/4G data rates simultaneously. The first processing chain achieves high data transmission for the first SIM card, and the second processing chain does the same for the second SIM card, thereby improving overall productivity while maintaining manufacturability through standardized modular components.
Data Source
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Figure 3
AI summary
Embodiments of the present invention disclose a terminal and a communication method thereof. The terminal includes: a first baseband processor, a second baseband processor, a first radio frequency chip, a second radio frequency chip, a first antenna, a second antenna, a third antenna, and a fourth antenna. The first baseband processor, the second baseband processor, the first radio frequency chip, and the second radio frequency chip all support an access capability of a third-generation or later-generation mobile communications technology. The first baseband processor is connected to the first antenna and the second antenna by using the first radio frequency chip. The first radio frequency chip is connected to the first antenna to form a first channel, and the first radio frequency chip is connected to the second antenna to form a second channel. The second baseband processor is connected to the third antenna and the fourth antenna by using the second radio frequency chip. The second radio frequency chip is connected to the third antenna to form a third channel, and the second radio frequency chip is connected to the fourth antenna to form a fourth channel. The terminal can simultaneously support 3G or later-generation services of multiple SIM cards.