Dual SIM Paging Interval Alignment for Power Reduction
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Solution Overview
Problem
Mobile stations with multiple subscriber identity modules (SIMs) experience increased power consumption during idle mode due to monitoring different paging intervals for each SIM, leading to higher battery drain compared to single-SIM devices.
Innovation Solution
Configuring the paging intervals for multiple SIMs to be aligned, using the same parameter R value for both SIMs, allowing the mobile station to wake up and listen for paging messages during a single combined interval, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station monitors different paging intervals for each SIM independently, then each SIM can receive its paging messages separately, but the power consumption during idle mode increases significantly
Solution Approach 1:
The patent combines multiple paging intervals into a single unified paging interval for dual-SIM mobile stations. Instead of monitoring separate paging intervals for SIM1 and SIM2 independently, the system merges them into one aligned paging interval where the mobile station wakes up once to check for paging messages from both networks, thereby reducing power consumption while maintaining reliable message reception for both SIMs
Solution Approach 2:
The patent implements periodic paging intervals where the mobile station wakes up at regular, aligned time intervals to monitor paging messages for both SIMs simultaneously. This periodic action allows the device to enter idle mode between paging intervals, conserving battery power, while ensuring it is available to receive paging messages at predictable intervals for both subscriber identities
2Adaptability or versatility
If the mobile station monitors paging intervals for multiple SIMs separately, then each SIM maintains its own paging schedule, but the battery drain approximately doubles compared to single-SIM devices
Solution Approach 1:
The patent merges the paging monitoring function for multiple SIMs into a single unified process. By aligning paging intervals and using one wake-up event to check paging messages for both SIMs, the system maintains full multi-SIM functionality while reducing energy loss from what would otherwise double with separate monitoring approaches
Solution Approach 2:
The patent creates a universal paging monitoring mechanism that handles multiple SIMs through a single aligned paging interval. This multi-functional approach allows one paging process to serve multiple subscriber identities simultaneously, maintaining adaptability for different SIMs while avoiding the energy penalty of separate monitoring routines for each SIM
Data Source
AI summary
Methods and apparatus for configuring and scheduling paging intervals for a mobile station (MS) having multiple subscriber identity modules (SIMs) to be aligned are provided. The MS having multiple SIMs may operate in a network via a particular radio access technology (RAT), such as Code Division Multiple Access (CDMA) EVDO (Evolution-Data Optimized). By having aligned paging intervals, the MS may wake up only once during the paging cycles for the various SIMs rather than waking up multiple times, thereby reducing power consumption of the MS during idle mode compared to a conventional MS with multiple SIMs.