Dual SIM Paging Collision Avoidance via Cell Reselection
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Solution Overview
Problem
In dual subscriber identification module (SIM) devices, paging collisions occur when the paging cycles of multiple SIMs overlap, leading to reduced reception probability for one SIM, as the device can only attempt to receive a paging message corresponding to one SIM at a time.
Innovation Solution
The electronic device employs a method to monitor and manage overlapping paging cycles of multiple SIMs, allowing each SIM to receive its corresponding paging message by performing cell reselection to avoid collisions, ensuring that both SIMs can receive their respective paging messages even when their cycles overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device monitors paging cycles for multiple SIMs simultaneously, then the reception probability of paging messages improves, but the device complexity increases due to the need to manage overlapping paging cycles and perform cell reselection
Solution Approach 1:
The electronic device determines whether a paging collision is likely to occur between multiple SIMs in advance, before the collision actually happens. Based on this preliminary determination, the device proactively performs cell reselection for one of the SIMs to avoid the collision, rather than reacting after the collision occurs. This preliminary action ensures high paging message reception probability while managing complexity through advance planning.
2Reliability
If the electronic device performs cell reselection to avoid paging collisions, then the paging message reception rate improves, but the loss of time increases due to the reselection process
Solution Approach 1:
The device performs cell reselection in advance when a paging collision is determined to be likely, rather than waiting for the collision to occur and then reacting. This preliminary reselection positions the device in a state where paging messages can be received without collision, avoiding the need for time-consuming reselection operations after missed paging messages.
Solution Approach 2:
The electronic device dynamically adjusts its cell selection based on the paging cycle configurations of multiple SIMs. By making the cell selection dynamic and adaptive to the specific paging collision scenario, the device optimizes the timing and necessity of reselection operations, reducing unnecessary reselections and associated time losses.
3Device complexity
If the electronic device uses a single receiver to monitor paging channels, then the device complexity is reduced, but the reception probability of paging messages deteriorates when paging cycles overlap
Solution Approach 1:
The electronic device uses a single receiver to monitor paging channels by determining in advance whether a paging collision is likely to occur. Based on this preliminary determination, the device performs cell reselection for one SIM to avoid the collision, ensuring that when the single receiver monitors the paging channel, it is monitoring at a time when no collision occurs. This approach maintains receiver simplicity while achieving high reception probability through advance collision avoidance.
Data Source
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AI summary
Various embodiments of the present invention relate to an electronic device using a plurality of subscriber identification modules, and a method for providing a communication service therefor. According to various embodiments of the present invention, an electronic device comprises: a first subscriber identification module; a second subscriber identification module; a communication circuit operatively connected to the first subscriber identification module and the second subscriber identification module; and a processor operatively connected to the communication circuit, wherein the processor may monitor a paging cycle for the first subscriber identification module and the second subscriber identification module, determine whether a paging conflict has occurred in which a first paging cycle of the first subscriber identification module and a second paging cycle of the second subscriber identification module overlap for at least a certain interval, and, on the basis of whether the paging conflict has occurred, reselect a cell in response to the subscriber identification module in idle mode of the first subscriber identification module or the second subscriber identification module. Various embodiments are possible.