Preprocessing method and system for monitoring multimode terminal

Abstract

The invention provides a preprocessing method and system for monitoring a multimode terminal. The preprocessing method comprises the following steps that: a first pseudo base station clones itself into a base station in a first public network, and a target multimode terminal is in the base station of the first public network; the first pseudo base station sends a downgoing signal to the target multimode terminal, receives a positioning updating request returned by the target multimode terminal and brings the target multimode terminal into a control scope; the first pseudo base station constructs a base station reassortment signaling, transmits the base station reassortment signaling to the target multimode terminal and assigns the target multimode terminal to a second pseudo base station, wherein the safety level of the first public network is higher than that of a second public network; and the second pseudo base station sends a downgoing signal to the target multimode terminal, receives a position updating request returned by the target multimode terminal and brings the target multimode terminal into a control scope so as to monitor the target multimode terminal. The preprocessing method and system disclosed by the invention ensure the stability of the public networks and provide basis for monitoring to the target multimode terminal of a high-safety-level network.

Description

technical field [0001] The present invention relates to the field of communication monitoring, and more specifically, to a preprocessing method and system for monitoring multi-mode terminals. Background technique [0002] At present, in special tasks such as criminal investigation, investigators often use pseudo-base stations to monitor the multi-mode terminals to which criminals belong, so as to obtain the communication content of criminals and realize effective monitoring and tracking of criminals. Before monitoring multi-mode terminals, preprocessing is required. Through pre-processing, the pseudo base station can obtain the communication content of multi-mode terminals, which provides the basis for subsequent monitoring of multi-mode terminals. Currently, the commonly used preprocessing methods for monitoring multi-mode terminals are : Use pseudo base stations to attack the public network where the multi-mode terminal is located, such as attacking the 2G (Second Generati...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiments of the present invention provide a preprocessing method and system for monitoring multi-mode terminals, so as to solve the problems that the existing preprocessing methods for monitoring multi-mode terminals reduce the stability of the public network and are not suitable for high-security-level networks

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