Mobile Terminal Network Selection Avoiding SIM Interference
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Solution Overview
Problem
In mobile terminals, identification cards often interfere with each other during communication services due to frequency overlap, leading to service disruptions.
Innovation Solution
A network selection method and apparatus that adjusts cell reselection information for the second identification card to avoid interfered cells by decreasing the cell priority, measurement value, or reselection threshold of the serving cell and increasing those of non-interfered cells, ensuring the second card reselects to a non-interfered cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple identification cards are used to support diversified communication services, then service versatility is improved, but interference between cards occurs due to frequency overlap
Solution Approach 1:
The patent applies local quality by making different card slots have different frequency characteristics. Specifically, the first card slot operates at a first frequency while the second card slot operates at a second frequency that is different from the first frequency, thereby avoiding interference while maintaining support for multiple communication services.
Solution Approach 2:
The patent segments the frequency resources by assigning different frequency ranges to different card slots. The first identification card uses a first frequency range while the second identification card uses a second frequency range, creating frequency separation that prevents interference between cards.
2Reliability
If cell reselection parameters are adjusted to avoid interference, then service stability is improved, but network selection complexity increases
Solution Approach 1:
The patent changes the frequency parameter as a key differentiation factor. By configuring the second card slot to operate at a second frequency different from the first frequency of the first card slot, the patent ensures that cards operating in the same card slot do not experience frequency-based interference, thereby improving service stability through parameter differentiation.
Data Source
AI summary
A network selection method includes executing, by a mobile terminal, a communication service using a first identification card, determining, by the mobile terminal, that the communication service interferes with a second identification card in the mobile terminal, and adjusting, by the mobile terminal, cell reselection information of the second identification card to reselect to a non-interfered-with cell.