Mobile Terminal Short Message Identification via Cell Reselection Timing
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Solution Overview
Problem
Existing methods for identifying pseudo base stations that send annoying or fraudulent short messages to mobile terminals are not sufficiently effective, as they rely on monitoring switching events and message content analysis, which can be complex and prone to false positives or negatives.
Innovation Solution
A method and device that analyze feature information of short messages, including content and sender number, in conjunction with timing of cell reselection operations, to determine if a message is from a pseudo base station by calculating time intervals between location area updates and message receipt, thereby automatically identifying suspicious messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If monitoring switching events and analyzing message content is used to identify pseudo base stations, then identification capability is improved, but system complexity increases and false positives occur
Solution Approach 1:
The patent extracts the timing relationship between location area updates and short message reception as a standalone identification criterion. By focusing on the time interval between these two specific events, the system isolates a key identifying feature that simplifies the overall detection mechanism while maintaining accuracy.
Solution Approach 2:
The patent records the timing of location area updates in advance, creating a temporal reference framework before short messages are received. This preliminary timing record enables rapid comparison and identification when messages arrive, avoiding complex real-time analysis and reducing false positives.
2Reliability
If multiple identification criteria are combined to reduce false positives, then reliability is improved, but processing time increases
Solution Approach 1:
The system pre-records the timing of location area updates and maintains a temporal reference framework before short messages are received. This allows for rapid comparison when messages arrive, eliminating the need for complex real-time multi-criteria analysis and significantly reducing processing time while maintaining reliability.
3Measurement precision
If existing identification methods are used, then some pseudo base stations can be detected, but many fraudulent messages are still delivered to terminals
Solution Approach 1:
The patent extracts the timing relationship between location area updates and short message reception as a standalone identification criterion. By focusing on this specific temporal feature, the system achieves more precise identification of pseudo base stations, thereby reducing the delivery of fraudulent messages to terminals.
Data Source
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AI summary
The present disclosure is about a method and a device for identifying a short message, wherein, the method comprises: obtaining (S101) feature information of the short message when a mobile terminal receives the short message, wherein the feature information includes at least content information; judging (S102) whether the short message is a suspected annoying short message according to the feature information; obtaining (S103), when it is judged that the short message is the suspected annoying short message, operation time of the mobile terminal performing a cell reselection operation with a location area update, wherein the operation time is closest to time of the mobile terminal receiving the short message; determining (S104) whether the short message is an annoying short message from a pseudo base station according to the operation time. In the technical feature, information security of user terminal may be guaranteed.