Mobile terminal cell reselection method, cell reselection device and mobile terminal

Abstract

The invention provides a mobile terminal cell reselection method, a cell reselection device and a mobile terminal. The mobile terminal cell reselection method comprises the steps of: in a process that the mobile terminal reselects a cell, detecting BCCH (Broadcast Control Channel) field intensities of multiple neighboring cells, and determining the target cell which meets a reselection condition according to the BCCH intensities of the multiple neighboring cells; when determining that the target cell which meets the reselection condition exists, determining whether the target cell is in an abnormal condition according to change amplitudes of the BCCH intensity of the target cell and the BCCH intensities of other neighboring cells; and determining that the target cell is in the abnormal state, limiting a selection authority to the target cell. Through the technical scheme provided by the invention, a pseudo cell can be identified quickly; and thus, the mobile terminal is prevented from initiating retention and access to the pseudo cell; namely, the user information safety is protected; and meanwhile, the communication service requirement of a user is not affected.

Description

technical field [0001] The present invention relates to the technical field of mobile terminals, in particular to a cell reselection method for a mobile terminal, a cell reselection device for a mobile terminal, and a mobile terminal. Background technique [0002] Pseudo base stations are radio signaling stations that pretend to be base stations of public mobile communication operators to extract mobile terminal information or transmit information to them. [0003] In related technologies, the application of the pseudo base station defense technology is mainly after the terminal selects a pseudo base station cell and decodes the system information of the corresponding cell, according to the C1 and C2 values ​​​​configured in the system information (there is a significant difference between the two), LAU (Location Area Update, location area update) location update frequency, base station SDCCH (Stand-Alone Dedicated Control Channel, Independent Dedicated Control Channel) type...

AI Technical Summary

Problems solved by technology

[0003] In related technologies, the application of the pseudo base station defense technology is mainly after the terminal selects a pseudo base station cell and decodes the system information of the corresponding cell, according to the C1 and C2 values ​​​​configured in the system information (there is a significant difference between the two), LAU (Location Area Update, location area update) location update frequency, base station SDCCH (Stand-Alone Dedicated Control Channel, Independent Dedicated Control Channel) type of service on the channel (usually the pseudo base station cell is configured to only support SMS service) and the base station cell configuration LAI (Location Area Identification, location area identification) value (the value ranges from 0 to 65535, but for the terminal to trigger the LAU process more easily, the pseudo base station often configures the LAI to be 0 or 65535 and other boundary values) and other access parameter information to identify pseudo Base station cell, although this method can judge whether the currently accessed cell is a fake base station cell (that is, a fake cell) by detecting the cell access parameters, but because it belongs to post-event defense, that is, the terminal has already begun to attempt to initiate camping on the fake base station cell. In this process, the user will not be able to perform normal communication services. At the same time, since the configuration parameters of the pseudo base station cell can be freely configured by software, it cannot be guaranteed to completely shield the pseudo base station cell.

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