Multi-SIM User Equipment Network Scanning Sequence
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Solution Overview
Problem
Existing techniques for network scanning at user equipment (UE) with multiple Subscriber Identity Modules (SIMs) lack flexibility and consume significant system resources.
Innovation Solution
The UE scans for network connections using each of the multiple SIMs in sequence, even if the primary SIM indicates an out-of-service condition, thereby increasing the likelihood of establishing a network connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE scans for network connections using each of the multiple SIMs in sequence, then the overall connectivity of the UE is improved, but the system resources consumed increase
Solution Approach 1:
The patent applies preliminary action by checking whether a SIM is in flight mode before initiating network scanning. This preliminary check prevents unnecessary scanning operations, thereby conserving system resources while maintaining connectivity reliability. The method performs a preliminary assessment of the SIM's operational state to avoid redundant scanning actions.
2Reliability
If the UE scans for network connections using each of the multiple SIMs in sequence, then the overall connectivity of the UE is improved, but the time required for scanning increases
Solution Approach 1:
The patent performs a preliminary check of the SIM's flight mode status before initiating network scanning. This preliminary action filters out SIMs that are in flight mode and cannot establish network connections, thereby reducing the total scanning time while maintaining connectivity reliability by focusing scans only on operational SIMs.
Data Source
AI summary
A user equipment (UE) having multiple Subscriber Identity Modules (SIMs) scans for network connections using each of the multiple SIMs in sequence, until either a network connection is found, or the UE determines that there is no available network connection. Each of the multiple SIMs supports connection to a different network. In response to a primary SIM of the UE identifying an out-of-service (OOS) condition for the corresponding network, the UE sequentially employs a different one of the multiple SIMs to attempt to connect to a different network. This increases the likelihood that the UE is able to connect to a network, thereby improving the overall user experience.