Multi-SIM Paging Collision Avoidance in Portable Terminals
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Solution Overview
Problem
Portable terminals using multiple SIM cards often experience paging collisions, which prevent simultaneous use of all SIM cards, limiting their functionality to only one network.
Innovation Solution
A method and apparatus that allow a portable terminal to camp on a predetermined cell using multiple SIM cards, determine if a paging collision occurs, identify the relevant paging information, and perform paging standby through the appropriate SIM card to avoid collisions and enable communication across all SIM cards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the portable terminal camps on the same cell through multiple SIM cards, then the terminal can expand network coverage and communication options, but paging collision occurs which limits functionality to only one SIM card
Solution Approach 1:
The patent divides the paging monitoring process into separate time slots for each SIM card. Each SIM card is assigned a specific time slot to monitor paging information, preventing simultaneous paging requests from colliding. This temporal segmentation allows multiple SIM cards to share the same cell without interference.
Solution Approach 2:
The patent implements preliminary action by having each SIM card determine its paging monitoring timing in advance based on its camp-on cell information. Before actual paging monitoring occurs, the system pre-calculates which time slots each SIM card should monitor, preventing collisions before they happen.
2Adaptability or versatility
If the portable terminal uses multiple SIM cards to perform paging standby, then the terminal can identify paging information more comprehensively, but the complexity of managing multiple SIM cards increases
Solution Approach 1:
The patent segments the paging standby process by time slot, assigning each SIM card a specific period to monitor paging information. This segmentation simplifies management by creating clear, non-overlapping responsibilities for each SIM card, reducing the complexity of coordinating multiple SIM cards.
Solution Approach 2:
The patent implements feedback mechanisms where each SIM card reports its camp-on cell information and paging status to the terminal controller. This feedback loop allows the system to automatically manage which SIM cards need to monitor paging in which time slots, simplifying the overall management process.
Data Source
AI summary
The present disclosure relates to a method and an apparatus for communication in a portable terminal using multiple Subscriber Identity Module (SIM) cards. The method includes: camping on a predetermined cell by each of the multiple SIM cards; determining whether paging collision occurs between a communication network supported by the predetermined cell on which the portable terminal has camped through a SIM card and another communication network supported by the predetermined cell on which the portable terminal has camped through another SIM card; identifying paging information through a predetermined SIM card among the multiple SIM cards after identifying camp-on information for each SIM card when a result of the determination shows that the paging collision occurs; and performing a paging standby for the communication network in the predetermined camped-on cell by the SIM card corresponding to the identified paging information based on a result of identifying the paging information.