Multi-SIM Terminal RRC Disconnection Error Reporting
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Solution Overview
Problem
Terminals supporting multiple SIM cards experience disruptions and errors when switching between SIM cards, leading to increased network errors and recovery times due to disconnections during operations like paging, system message reading, and tracking area updates.
Innovation Solution
A method and apparatus for a terminal to detect and record error causes of RRC connection disconnections due to operations by an idle second SIM card, and to report these error causes to the first base station after re-establishing a connection, allowing the base station to exclude these errors from recovery processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal performs operations for the second SIM card (paging, system message reading, tracking area update) while maintaining RRC connection with the first base station, then the terminal can access multiple networks, but the RRC connection is disconnected causing increased error statistics and recovery time
Solution Approach 1:
The terminal performs preliminary actions by recording the error cause immediately when RRC connection disconnection is detected due to second SIM card operations. This preliminary recording prepares the error information for later reporting, allowing the base station to recognize and exclude these expected errors from recovery processes, thereby maintaining connection stability while supporting multi-SIM functionality
Solution Approach 2:
The terminal establishes a feedback mechanism by reporting the recorded error cause to the base station after completing second SIM card operations and re-establishing RRC connection. This feedback loop enables the base station to understand the root cause of disconnections, differentiate between abnormal errors and expected operational errors, and adjust error statistics accordingly, improving overall system reliability
2Measurement precision
If the terminal reports all RRC connection disconnections as errors, then comprehensive error monitoring is achieved, but unnecessary recoveries are triggered increasing network overhead and recovery time
Solution Approach 1:
The error reporting mechanism is segmented into two distinct phases: error cause recording phase (when disconnection occurs) and error cause reporting phase (after reconnection). This segmentation allows the system to capture all disconnection events accurately while selectively processing them based on their causes, preventing unnecessary recoveries for expected operational errors during second SIM card activities
Solution Approach 2:
The base station changes the parameter of error statistics by excluding errors with specific error causes (those resulting from second SIM card operations) from the total error count. This parameter modification allows comprehensive error monitoring to maintain measurement precision while reducing recovery time by avoiding unnecessary recovery procedures for expected operational disruptions
Data Source
AI summary
Methods and apparatuses for reporting an error cause are provided. A method includes: after establishing a radio resource control (RRC) connection with a first base station, detecting whether the RRC connection is disconnected due to execution of a target operation; where the first base station is a base station accessed by a first SIM card of the terminal, and the target operation is an operation executed by a second SIM card in an idle state in the terminal; if the RRC connection is disconnected, recording that a target error cause of disconnecting the RRC connection is resulted from the target operation. The terminal may record the target error cause of disconnecting the RRC connection with the first base station due to the target operation to subsequently enable the first base station not to perform recovery for the target error cause any longer, thus reducing network errors statistics.