Dual-SIM Front-End Carrier Separation for Parallel Communications
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Solution Overview
Problem
Existing cellular communication devices struggle to efficiently process multiple carriers from different network operators with varying channel bandwidths and operational bands, particularly in multi-SIM devices, leading to limitations in simultaneous data and voice connections.
Innovation Solution
A dual-SIM apparatus with a front end module capable of processing multiple carriers from different network operators by separating and downconverting them to baseband frequency, allowing independent control of gain and scheduling, and supporting both DSDA and DSDS modes with receive diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple carriers from different network operators are processed in a single channel, then device complexity is reduced, but signal processing reliability deteriorates due to interference and difficulty in separating carriers with varying channel bandwidths
Solution Approach 1:
The received transmission is divided into multiple channels, with each channel dedicated to processing a specific carrier from a specific network operator. This segmentation allows each channel to handle carriers with different bandwidths independently, preventing interference between operators while maintaining manageable device complexity through structured organization.
2Adaptability or versatility
If carriers with different channel bandwidths are processed simultaneously, then network versatility is improved, but manufacturing precision deteriorates due to difficulty in maintaining accurate frequency separation
Solution Approach 1:
Each channel is configured with specific processing parameters optimized for its assigned carrier's bandwidth. The first channel processes the first carrier with bandwidth-specific settings, while the second channel processes the second carrier with different bandwidth-specific settings, allowing accurate frequency separation and processing of carriers with different channel bandwidths from multiple network operators.
3Device complexity
If a single processor handles multiple carriers, then device complexity is reduced, but productivity deteriorates due to inability to process multiple signals in parallel
Solution Approach 1:
Multiple processors are combined in a parallel architecture where the first processor handles the first carrier and the second processor handles the second carrier simultaneously. This merging of processing resources enables parallel signal processing, dramatically improving productivity while the modular channel structure keeps overall device complexity manageable.
Data Source
AI summary
A method, apparatus and computer program is described comprising: receiving a first transmission from an antenna, the first transmission comprising a first carrier including a first signal and a second carrier including a second signal, wherein the first and second carriers are separated in frequency within a first operational band; splitting the first transmission into a first channel and a second channel; downconverting the first channel to centre the first carrier at a baseband frequency to extract the first signal; downconverting the second channel to centre the second carrier at the baseband frequency to extract the second signal; and providing the first signal to a first processor and the second signal to a second processor; wherein the first and second processors are associated with first and second subscriber identity modules respectively.