Multi-SIM Paging Offset Control for Collision Avoidance
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Solution Overview
Problem
Multi-SIM mobile phones experience paging collisions, leading to missed messages and failed service establishment due to overlapping paging occasions among different SIMs, particularly in inactive states.
Innovation Solution
A method and apparatus for managing paging collisions by sending target indication information to the core network to determine a target paging offset value, allowing terminals with multiple SIMs to receive messages at optimal occasions, involving base stations and the core network to adjust paging times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple SIMs use the same initial paging occasions, then the terminal can maintain simple paging procedures, but paging collisions occur causing missed messages and failed service establishment
Solution Approach 1:
The patent changes the paging occasion parameter by introducing a target paging offset value that shifts the paging timing for different SIMs. The terminal determines a target paging occasion by adding the offset to the initial paging occasion, thereby separating paging times and avoiding collisions while maintaining the overall paging structure
Solution Approach 2:
The terminal performs preliminary determination of the target paging offset value before actual paging occurs. The offset value is determined based on SIM card information in advance, allowing the terminal to pre-calculate the correct paging occasion and avoid collisions before they happen
2Reliability
If the terminal adjusts paging occasions dynamically, then paging collisions can be avoided, but the complexity of paging management increases
Solution Approach 1:
The terminal autonomously determines its own target paging offset value based on its SIM card information without requiring complex network coordination. The terminal self-adjusts its paging occasion by calculating the offset and applying it to the initial paging occasion, thereby avoiding collisions through self-service rather than complex centralized management
Solution Approach 2:
The patent introduces a simple parameter change mechanism where the terminal modifies the paging occasion by adding a calculated offset value. This simple parameter adjustment approach avoids the need for complex paging management systems while effectively preventing collisions
Data Source
AI summary
A paging method is performed by a terminal including multiple subscriber identity modules (SIMs), and the method includes: sending target indication information to a core network in response to determining that a paging collision exists at initial paging occasions of the multiple SIMs, wherein the target indication information is configured to indicate that the paging collision exists; receiving a target paging offset value corresponding to a target SIM in the multiple SIMs; and determining, based on the target paging offset value, a target paging occasion for receiving by the target SIM a paging message.