In recent years,China has entered a period of frequent emergenciesAll kinds of major special incidents occur from time to time, and emergencies pose a serious threat to national security and social stability. At the same time, criminal activities are developing towards technicalization, high efficiency and collectivization. Mobile phones, as an important communication tool for criminals to engage in criminal activities, run through the whole process of criminal activities.
Therefore, in the actual process of handling cases, the importance of finding clues through data has become increasingly prominent with the help of mobile communication tools held by criminal suspects. At present, through the analysis of communication data, the public security department has become an important means of investigating and solving cases to find out the relevant clues of criminal activities. Because the inherent characteristic information of the mobile phone itself can not only show the position of its holder, but also find and judge the mobile phone holder's range of activity and the law of activity through the analysis of the characteristic information and the summary analysis of a large number of location information. Therefore, grasping the mobile phone's trajectory is equivalent to grasping the mobile phone's trajectory. Grasp the criminal's track of activity.
in order toTo improve the efficiency of the reconnaissance work of public security organs, it is necessary to build a set of hotspot acquisition integrated system. Front-end acquisition equipment is distributed in the main entrances and exits of the city, real-time acquisition of mobile phone signatures, and back-end integrated platform can realize the application requirements of comprehensive query, target number alarm, trajectory analysis and so on.
Emphasis should be laid on such crowded places as transportation hubs, shopping plazas and scenic spots, as well as on such complex places of public order as main roads, urban entrances and exits, and villages in cities.Deployment of front-end acquisition equipment (jack)25 sets. RealizationMobile terminalMAC address, IMSI, IMEI, time, date, location and other information acquisition, and real-time upload of the collected data to the management and control background, ultimately to achieve multi-source information aggregation, common public security application services.
system parameter | |
Working frequency band | Band38, Band39, Band3 (Unicom, Telecom) |
Emission power | Default 1W/carrier (power adjustable) |
Carrier combination | Mobile two-carrier, telecommunications Unicom each carrier, a total of four carriers |
Working bandwidth | 5M |
EVM | Better than 6% |
Out-of-band spurious | Meeting 3GPP Protocol Provisions |
Receiving sensitivity | -104dBm |
Receiver dynamic range | -30dbm~-104dbm |
Coverage | 0.2-30 M(related to wireless environment and transmission power) |
Capture peak rate | 800group/Minute/carrier |
Average capture rate | More than 92% |
Fast Mobile Capture Rate | More than 90%,120KM/H |
Return time | Less than 2S |
Antenna and interface | Omnidirectional/directional (optional), SMA interface |
Capture interval time | Settable (3 minutes to 12 hours) |
data transmission | 3G Network/WIFI Network Line |
System interference | The influence time of mobile terminal normal communication in the state of handset: less than 30 seconds The repeated acquisition time for the same mobile terminal can be set in a certain time. |