Smart Card Suspension Control for IoT Power Efficiency
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Solution Overview
Problem
IoT terminals face high power consumption issues due to always-on UICC states, leading to short battery life in applications where devices are often inactive, such as remote monitoring and tracking, which is not efficiently addressed by existing communication protocols.
Innovation Solution
A smart card control method that transmits a suspension command to the smart card, allowing it to enter a suspended state and reducing power consumption by turning off the power supply, thereby prolonging battery life without altering hardware on the network side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the smart card remains in an always-on state to maintain communication readiness, then communication reliability is improved, but power consumption increases and battery service time decreases
Solution Approach 1:
The smart card dynamically transitions between operational states (active, suspended, and stopped) based on communication needs. The card can be suspended during idle periods and quickly recovered when communication is required, optimizing the balance between reliability and power consumption.
Solution Approach 2:
The smart card implements periodic suspension and recovery cycles. During non-communication periods, the card enters a suspended state with reduced power consumption, and is periodically recovered when communication events occur, creating a rhythm of high and low power states that extends battery life while maintaining communication capability.
2Use of energy by moving object
If the smart card is suspended to reduce power consumption, then energy efficiency is improved, but communication response time increases
Solution Approach 1:
The smart card performs preliminary actions by maintaining a suspended state with preserved context information rather than fully stopping. This allows the card to be quickly recovered and resume communication operations faster than from a complete stop, reducing the time penalty while still achieving significant power savings during suspension.
3Duration of action of stationary object
If the smart card power supply is turned off to extend battery life, then battery service time is improved, but the smart card cannot respond to communication requests
Solution Approach 1:
The patent segments the power management into distinct operational modes: full power (operational), reduced power (suspended), and minimal power (stopped). By segmenting the power states and using appropriate suspension commands (STOP, SUSPEND, RESET), the system can extend battery life through prolonged suspension periods while maintaining the ability to quickly reactivate when communication is needed.
Data Source
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AI summary
A method and device for controlling a smart card are provided. The control method includes that: a suspension command is transmitted to the smart card (101); and a recovery information keyword returned by the smart card according to the suspension card and configured to recover the smart card from a suspended state is received (102). By the present invention, the suspension command is transmitted to the smart card and a power supply of the smart card may be removed, so that power consumption of the smart card is reduced, energy consumption of the terminal device is reduced and service time of a battery of the terminal device is prolonged.