IMSI extraction method for 4G electronic fence system

A technology of electronic fence and extraction method, applied in the field of IMSI extraction, can solve the problems of strong transmission power and poor stability, etc.

Inactive Publication Date: 2018-12-04
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 4G network protocol stipulates the same-frequency start-up threshold parameter S intrasearch and the threshold parameter S of the inter-frequency start test nonintrasearch , which leads to the disadvantages of poor stability, strong transmission power, etc.

Method used

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  • IMSI extraction method for 4G electronic fence system
  • IMSI extraction method for 4G electronic fence system

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Experimental program
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Embodiment Construction

[0014] specific implementation plan

[0015] Further describe the technical scheme of the present invention in detail below in conjunction with accompanying drawing:

[0016] The working principle of an IMSI extraction method for a 4G electronic fence system is as follows: first, listen to and analyze the 4G signal in the current area to obtain system information, select a suitable template to construct a downlink synchronization induction signal, and build a 4G virtual base station. Secondly, the 4G virtual base station sends a synchronization induction signal to induce users to initiate a cell search process to access the virtual base station. Afterwards, after the user decodes the tracking area code, the tracking area update request process will be triggered, and the tracking area update rejection signaling will be constructed and sent to the user through the virtual base station to force the user to re-initiate the attach process to register on the network side and report ...

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Abstract

The invention discloses an international mobile subscriber identity (IMSI) extraction method for a 4G electronic fence system. The method comprises: a virtual base station is constructed and a synchronization inducing signal is constructed to induce a user to re-initiate a cell search process to realize the access to the virtual base station; after decoding by the user, a tracking area update request process is triggered and a tracking area update rejection signaling is constructed and is issued to the user, so that the user initiates an attached process again to realize registration at a network side and reports IMSI information; and then the virtual base station parses an Attach request signaling from the user to extract the IMSI and an Attach reject signaling is constructed and is issued to force the user to return to a public network base station. Compared with the prior art, the IMSI information of all 4G-system users in the control range of the virtual base station can be extracted stably.

Description

technical field [0001] The invention belongs to an IMSI extraction method of a 4G electronic fence system. Background technique [0002] With the rapid development of domestic mobile communication technology and the popularization of mobile terminals, there are two main ways to obtain IMSI. One is to build a 2G virtual base station and use the characteristics of one-way authentication of the GSM network, that is, the legality of the base station to identify users. , and the user does not recognize the legitimacy of the base station to induce the user to access and report the IMSI information. But this method can only obtain the user's identity information on the 2G network, and lacks practicability when the 4G network is popularized. Another method is to obtain the IMSI of the user on the 4G network by inducing the user to perform cell reselection. This method suppresses the existing network base station by building a powerful 4G virtual base station, and enables the user t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/021H04W8/26H04W48/16H04W60/00
CPCH04W4/021H04W8/26H04W48/16H04W60/00
Inventor 田增山李志濠杨小龙何维周牧王勇聂伟谢良波
Owner CHONGQING UNIV OF POSTS & TELECOMM
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