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GSM (Global System for Mobile Communications) mobile phone voice monitoring method

A monitoring method and mobile phone technology, applied in the field of communication, can solve problems such as inability to monitor mobile phones

Inactive Publication Date: 2017-12-12
GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this patent is that a control device needs to be installed on the monitored mobile phone, and it is impossible to monitor all mobile phones in a certain area

Method used

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  • GSM (Global System for Mobile Communications) mobile phone voice monitoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment monitors the specific target mobile phone separately, see figure 1 ,Proceed as follows:

[0034] S101. Collect and process the air interface data of each GSM frequency point, and search and synchronize multiple nearby GSM cells.

[0035] Collect the air interface data of each GSM frequency point, divide the collected data into multiple parts according to the total number of GSM frequency points, use multi-core processors to process in parallel, each core processes a part of the cell search tasks within the frequency point range, and sequentially capture FCCH, SCH and BCCH channels complete the downlink synchronization of each frequency cell, obtain cell system information, and realize the search and synchronization of multiple GSM cells around.

[0036] S102. Monitor the control channel, detect the signaling message, and obtain the mobile user identification code, encryption mode, peer number, service channel parameters, channel and cell handover parame...

Embodiment 2

[0059] This embodiment monitors all mobile phones in the synchronous community, that is, extensive listening, and the steps are as follows:

[0060] S201. Collect and process the air interface data of each GSM frequency point, and search and synchronize multiple nearby GSM cells.

[0061] Collect the air interface data of each GSM frequency point, divide the collected data into multiple parts according to the total number of GSM frequency points, use multi-core processors to process in parallel, each core processes a part of the cell search tasks within the frequency point range, and sequentially capture FCCH, SCH and BCCH channels complete the downlink synchronization of each frequency cell, obtain cell system information, and realize the search and synchronization of multiple GSM cells around.

[0062] S202. Monitor the control channel, detect the signaling message, and acquire the mobile user identification code, encryption mode, peer number, service channel parameters, cha...

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Abstract

The invention discloses a GSM (Global System for Mobile Communications) mobile phone voice monitoring method. The method comprises the following steps of S1, collecting and processing air interface data of GSM frequency points and searching and synchronizing a plurality of GSM cells; S2, monitoring a control channel, detecting a signal message, obtaining a mobile subscriber identity, an encryption mode, an opposite end number, a business channel parameter, a signal and cell switching parameter and a signal release indicator; and S3, monitoring a business channel to obtain voice content. According to the method, the independent voice monitoring can be carried out on special target mobile phones within a plurality of surrounding GSM cell ranges, and extensive monitoring can be carried out on all mobile phones within the plurality of surrounding GSM cell ranges.

Description

technical field [0001] The invention relates to the communication field, in particular to a voice monitoring method for a GSM mobile phone. Background technique [0002] GSM (Global System for Mobile Communications) is currently the most widely used mobile communication standard. More than 1 billion people in more than 200 countries and regions around the world are using GSM phones. [0003] The logical channels of GSM are divided into traffic channel TCH (Traffic Channel) and control channel CCH (ControlChannel). The traffic channel is used to transmit coded voice or data information, and the control channel is used to transmit control information. Control channels are divided into broadcast channels, common control channels and dedicated control channels, where broadcast channels include frequency correction channel FCCH (Frequency Correction Channel), synchronization channel SCH (Synchronization Channel) and broadcast control channel BCCH (Broadcast Control Channel). Th...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04M7/00H04L29/12
CPCH04L63/30H04L63/302H04M7/0078H04L2101/65H04L2101/654
Inventor 饶华铭
Owner GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD
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