Predictive SIM Polling for Portable Terminal Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable terminals experience unnecessary SIM card polling even in idle states, leading to increased battery power consumption and CPU utilization, reducing the device's usage time.
Innovation Solution
Implementing a predictive polling technique that disables SIM card polling when the portable terminal is in a restricted service or no-service state and enables it only when the device is in a service state or upon specific network changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SIM card polling is performed continuously according to 3GPP standard, then SIM card installation status can be identified reliably, but battery power consumption increases and CPU resources are wasted
Solution Approach 1:
The polling mechanism transitions from static continuous polling to dynamic conditional polling. The system adaptively adjusts polling behavior based on network state changes and service availability, performing polling only when necessary rather than continuously, thereby reducing power consumption while maintaining reliable SIM status detection
Solution Approach 2:
The polling interval and activation status are changed as parameters based on network conditions. When the terminal is in restricted service or no-service states, polling is disabled or interval is extended. When service is available, polling operates normally, thus optimizing power usage while preserving detection capability
2Reliability
If SIM card polling is performed in idle state, then SIM card status can be monitored, but CPU utilization rate increases unnecessarily
Solution Approach 1:
Instead of performing full polling operations continuously, the system applies partial action by disabling polling during idle states with restricted or no service. Polling is performed partially or fully only when service is available, reducing CPU utilization while maintaining adequate monitoring coverage
Solution Approach 2:
The unnecessary polling operations are extracted and removed from the idle state execution flow. By identifying and eliminating redundant polling when service is unavailable, CPU resources are freed while SIM status monitoring is maintained through selective polling when service is present
3Reliability
If polling is performed regardless of network state, then SIM card detection is consistent, but device usage time is reduced due to power consumption
Solution Approach 1:
The system performs preliminary assessment of network state before executing polling operations. By checking service availability in advance and conditionally enabling polling based on this preliminary evaluation, the system avoids unnecessary power consumption while maintaining consistent SIM detection, thereby extending device usage time
Data Source
AI summary
An apparatus and method for power saving using predictive polling in a portable terminal are provided. A method for predictive polling for a Subscriber Identity Module (SIM) card in a portable terminal includes determining whether a network state of a portable terminal is changed, when the network state is changed, determining whether the portable terminal is in a restricted service state or no-service state, when the portable terminal is in the restricted service state or no-service state, disabling SIM card polling, and when the portable terminal is not in the restricted service state or no-service state, enabling the SIM card polling.