Paging Message Filtering for Dual-SIM Service Continuity
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Solution Overview
Problem
Dual-SIM Dual-Standby terminal devices face service interruptions and user experience degradation due to frequent antenna resource switching when receiving spam packets meant for slave SIM cards, affecting the data service of master SIM cards.
Innovation Solution
A method and apparatus for processing paging messages in terminal devices that determine whether a received message is intended for a slave SIM card not providing data service, allowing the device to discard such messages without establishing a data link, thereby preventing antenna resource switching and maintaining service integrity for the master SIM card.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device processes all received paging messages including those for slave SIM cards, then complete message handling is achieved, but antenna resource switching occurs frequently causing service interruptions
Solution Approach 1:
The patent extracts and identifies paging messages intended for slave SIM cards using specific filtering criteria (message type, cause value, SIM card state), then removes these messages from further processing. This extraction approach allows the system to maintain service continuity by preventing antenna switching while still monitoring all messages.
Solution Approach 2:
The patent performs preliminary identification and classification of paging messages before full processing occurs. By checking message characteristics and SIM card states in advance, the system determines which messages should be discarded, preventing unnecessary antenna switching and service interruptions before they occur.
2Adaptability or versatility
If the terminal device establishes data links for all SIM cards receiving paging messages, then all services are maintained, but antenna resources are frequently switched degrading user experience
Solution Approach 1:
The patent applies different processing qualities to different SIM cards based on their roles. Master SIM cards receive full processing and data link establishment, while slave SIM cards have their paging messages filtered and discarded. This local differentiation maintains multi-SIM capability while ensuring service stability for the master SIM.
Solution Approach 2:
The patent implements partial processing for slave SIM cards by performing initial message identification and filtering without completing full data link establishment. This partial action approach maintains the ability to handle multiple SIMs while avoiding the excessive antenna switching that would occur with full processing of all messages.
3Loss of information
If the terminal device monitors paging messages for inactive SIM cards, then background page monitoring is achieved, but time base accuracy deteriorates due to environmental factors
Solution Approach 1:
The patent applies frequency correction to the time base before background paging monitoring occurs for inactive SIM cards. This preliminary correction compensates for environmental factors that would otherwise cause time base drift, ensuring accurate paging message reception while maintaining time synchronization.
Solution Approach 2:
The patent introduces frequency correction as an intermediary mechanism between the time base and paging message reception process. This intermediary corrects time base inaccuracies caused by environmental factors, allowing accurate monitoring of paging messages for inactive SIM cards without suffering from time drift.
Data Source
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AI summary
A method and an apparatus for processing a paging message can be applied to a terminal device supporting a plurality of Subscriber Identification Module (SIM) cards. The method includes: a target paging message corresponding to a SIM card of a current paging cycle from a network side is received; it is determined whether the target paging message belongs to a spam message paging a slave SIM card, wherein the slave SIM card is any one of the plurality of SIM cards that does not provide a data service; and the target paging message is discarded when the target paging message belongs to the spam message paging the slave SIM card.