Dual SIM Power Control for Battery Voltage

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Solution Overview

Problem

Dual SIM mobile phones operating in dual active mode experience rapid battery power dissipation due to high power consumption, leading to short battery life.

Innovation Solution

A portable device with two wireless modules and subscriber identity cards dynamically adjusts the transmission power of a slave wireless module based on battery voltage, maintaining power levels and avoiding abrupt shutdowns by using a power control unit to detect voltage changes and adjust transmission power accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If dual SIM dual active mode is used to provide two communication services simultaneously, then communication service availability is improved, but battery power consumption increases rapidly

Engineering Contradiction:

Improvecommunication service availabilityVSAvoidbattery power consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic power adjustment by making the transmission power of the slave wireless module variable rather than fixed. The power control unit continuously monitors battery voltage and adjusts the transmission power accordingly, transitioning the system from a static high-power state to a dynamic state that adapts to battery conditions, thereby reducing overall power consumption while maintaining dual active communication capability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the transmission power parameter of the slave wireless module based on battery voltage levels. By monitoring battery voltage and adjusting the transmission power parameter dynamically, the system optimizes the balance between communication performance and power consumption, preventing rapid battery depletion while maintaining dual SIM dual active functionality

Inventive Principle:

Principle #35Parameter changes

2Duration of action of stationary object

If transmission power is reduced to save battery power, then battery life is extended, but communication signal quality may deteriorate

Engineering Contradiction:

Improvebattery lifeVSAvoidcommunication signal quality

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

The patent applies different power levels to different wireless modules based on their roles. The master wireless module maintains full transmission power to ensure communication reliability, while the slave wireless module operates at reduced power when battery voltage is low. This local differentiation of power quality allows the system to extend battery life without compromising overall communication signal quality, as the master module continues to provide robust communication

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS9173171B2Portable device with subscriber identity cards and method for controlling transmission power thereof

Publication Date: 2015.10.27 HTC CORP

AI summary

A portable device is provided. The portable device comprises a first wireless module, a second wireless module, a first subscriber identity card coupled to the first wireless module, a second subscriber identity card coupled to the second wireless module and a battery. The first subscriber identity card camps on a cell via the first wireless module. The second subscriber identity card camps on the same cell or a different cell via the second wireless module. A first transmission power of one of the first and second wireless modules is maintained, and a second transmission power of another one of the first and second wireless modules is dynamically adjusted according to a variation in a voltage of the battery.