Baseband Chip Parallel SIM Access Reduces Power

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Solution Overview

Problem

Dual SIM mobile phones currently require sequential access to subscriber identity cards, leading to increased battery power consumption due to waiting for one SIM to complete its operations before accessing the other, which is inefficient and power-intensive.

Innovation Solution

Implementing a system with a Baseband chip that includes separate SIM interfaces and processors for each SIM card, allowing parallel polling and access management through aligned timers, reducing power consumption by synchronizing polling operations when possible.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If sequential access method is used for dual SIM cards, then device complexity is reduced, but battery power consumption increases and access efficiency decreases

Engineering Contradiction:

Improveaccess control structureVSAvoidbattery power consumption

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The patent divides the access control structure into separate components: a first processor dedicated to the first SIM card and a second processor dedicated to the second SIM card. Each processor independently manages its respective SIM card through dedicated interfaces, eliminating the need for a single controller to sequentially switch between SIMs. This segmentation allows simultaneous operations on both SIMs without waiting for completion of the other, directly reducing battery power consumption while maintaining manageable device complexity through modular design

Inventive Principle:

Principle #1Segmentation

2Device complexity

If sequential access method is used for dual SIM cards, then device complexity is reduced, but access efficiency and productivity decrease

Engineering Contradiction:

Improveaccess control structureVSAvoidSIM access efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent implements separate processors for each SIM card, allowing independent simultaneous operations. The first processor handles first SIM card operations while the second processor handles second SIM card operations without interference. This eliminates the sequential bottleneck where one SIM must wait for the other to complete, significantly improving productivity and access efficiency while keeping the system manageable through clear functional separation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from a single-dimensional sequential access model to a multi-dimensional parallel access model. By introducing separate processors and interfaces for each SIM card, the system enables simultaneous operations in different temporal and functional dimensions. This dimensional expansion allows both SIMs to be accessed and operated on at the same time, dramatically improving access efficiency without requiring a completely complex control system

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS9380448B2Methods for accessing subscriber identity cards via a dedicated interface and systems containing subscriber identity cards each with a dedicated interface

Publication Date: 2016.06.28 MEDIATEK INC

AI summary

A system for accessing subscriber identity cards each via a dedicated interface is provided. The system includes a first subscriber identity card, a second subscriber identity card and a Baseband chip. The Baseband chip includes a first subscriber identity module (SIM) interface coupled to the first subscriber identity card, a second SIM interface coupled to the second subscriber identity card and a processor coupled to the first and second SIM interfaces. The processor accesses the first subscriber identity card via the first SIM interface and the second subscriber identity card via the second SIM interface.