Dual SIM Wireless Device Idle Mode Task Overlap Handling
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Solution Overview
Problem
Current wireless communication devices with multiple SIMs and receiving modules face challenges in optimizing cell and Radio Access Technology (RAT) selection during idle mode, leading to inefficient radio resource management and potential interruptions in service quality.
Innovation Solution
The method determines the best cells and RATs for each SIM based on performance metrics like throughput, latency, and power consumption, and adapts the receiving module usage to minimize power consumption by overlapping or separating idle mode tasks as needed, ensuring optimal selection and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the wireless communication device uses a single receiving module to handle idle mode tasks for multiple SIMs, then power consumption is reduced, but service quality may be interrupted when tasks overlap in time
Solution Approach 1:
The system dynamically selects between single-receiver and multi-receiver modes based on real-time task overlap detection. When idle mode tasks for different SIMs overlap in time, the system activates additional receiving modules to handle simultaneous tasks, preventing service interruptions. When tasks do not overlap, the system uses a single receiving module to minimize power consumption.
2Reliability
If the wireless communication device enables multiple receiving modules to handle idle mode tasks simultaneously, then service quality is maintained, but power consumption increases
Solution Approach 1:
The system employs dynamic receiver allocation where receiving modules are activated only when task overlap is detected. The controller unit monitors task timing and selectively enables additional receiving modules only during periods when multiple SIMs require simultaneous idle mode task handling, keeping other receivers in low-power states during non-overlapping periods.
3Ease of operation
If the wireless communication device uses a preferred RAT setting to select network, then device operation is simplified, but network performance is not optimized when multiple RATs are available
Solution Approach 1:
The system performs preliminary evaluation of available networks and RATs by estimating performance metrics (throughput, latency, power consumption) before selecting a network for camping. This advance assessment allows the device to choose the optimal RAT based on current conditions rather than relying solely on static preferred RAT settings, thereby improving network performance while maintaining simplified operation through automated selection.
Data Source
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AI summary
A wireless communication device (140) and method therein for selecting cell and Radio Access Technology, RAT, in a wireless communication system (100) are disclosed. The wireless communication device (140) comprises multiple receiving modules and at least two Subscriber Identity Modules, SIMs. The wireless communication device (140) determines a first cell and a first RAT to camp on using a first receiving module for a first SIM based on estimating a performance of a number of RATs and cells in the wireless communication system (100). The wireless communication device (140) determines a second cell and a second RAT to camp on using a second receiving module for a second SIM based on estimating a performance of the number of RATs and cells in the wireless communication system (100). The wireless communication device (140) determines whether idle mode tasks of the first and second SIMs with the determined cells and RATs overlap in time. When the idle mode tasks of the first and second SIMs do not overlap in time, the wireless communication device (140) handles the idle mode tasks of the first and second SIMs using the first receiving module or the second receiving module. When the idle mode tasks of the first and second SIMs overlap at least partly in time, the wireless communication device (140) selects a SIM out of the first and second SIMs for which to move the idle mode tasks to a third receiving module and enabling the third receiving module to handle the idle mode tasks of the selected SIM.