Multi-SIM Switching Using RF Occupancy and Network Status
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Solution Overview
Problem
Existing SIM card switching methods in electronic devices with multiple SIM cards often result in incorrect and inefficient switching due to reliance on network connection parameters that do not account for short-term radio frequency occupation, leading to traffic consumption and user operation delays.
Innovation Solution
The method involves a modem and application processor that monitor radio frequency usage and network connection status to determine optimal SIM card switching, preventing incorrect switching by identifying temporary radio frequency occupation and ensuring a stable network connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SIM card switching is performed based on network connection parameters alone, then switching simplicity is maintained, but switching accuracy deteriorates due to false triggering during temporary radio frequency occupation
Solution Approach 1:
The modem performs preliminary detection of radio frequency occupation status before triggering SIM card switching. By checking whether the radio frequency is temporarily occupied by high-priority signaling before making a switching decision, the system avoids false switching triggers and improves switching accuracy without requiring complex additional hardware
Solution Approach 2:
The system implements feedback by continuously monitoring radio frequency usage status and using this information to adjust switching decisions. The modem provides feedback about radio frequency occupation to the switching control logic, enabling dynamic adjustment of switching behavior based on real-time conditions
2Reliability
If SIM card switching is performed frequently to maintain network connection quality, then network connection reliability is improved, but user operation delay increases due to repeated switching
Solution Approach 1:
The system performs preliminary detection of radio frequency occupation status before triggering SIM card switching. By checking whether the radio frequency is temporarily occupied by high-priority signaling before making a switching decision, the system avoids false switching triggers and improves switching accuracy without requiring complex additional hardware
Solution Approach 2:
The switching mechanism dynamically adjusts its behavior based on real-time radio frequency status. When temporary occupation is detected, switching is suppressed; when genuine network degradation occurs, switching is enabled. This dynamic adaptation ensures reliable connectivity while minimizing unnecessary switching operations that would cause user delay
3Productivity
If SIM card switching is performed without checking radio frequency status, then switching speed is maintained, but traffic consumption increases due to incorrect switching
Solution Approach 1:
The modem performs preliminary detection of radio frequency occupation status before triggering SIM card switching. By checking whether the radio frequency is temporarily occupied by high-priority signaling before making a switching decision, the system avoids false switching triggers and improves switching accuracy without requiring complex additional hardware
Solution Approach 2:
The system adds a partial check (radio frequency status detection) to the switching decision process. This additional partial action filters out incorrect switching scenarios without completely overhauling the switching mechanism, thereby maintaining most of the original switching speed while reducing unnecessary traffic consumption from incorrect switching operations
Data Source
AI summary
An objective of this application is to provide a SIM card switching method and apparatus, and an electronic device, so that the electronic device can quickly and accurately perform SIM card switching. The electronic device comprehensively determines, based on a use status of a radio frequency and a network connection status, whether a SIM card needs to be switched. When the radio frequency is used by a specific service, a network connection is temporarily abnormal. However, this temporarily abnormal network connection does not affect operation experience of a user. In this case, if the SIM card is switched, traffic of the SIM card is wasted, and time consumption during SIM card switching also increases a user operation delay. Consequently, determining whether to switch the SIM card only based on the network connection causes incorrect SIM card switching. In this application, incorrect SIM card switching can be avoided.