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Sniffer for Detecting Lost Mobile Presentation Transcript
· 1. Visit www.seminarlinks.blogspot.in to Download Sniffer for Detecting Lost Mobile
· 2 . Contents • Introduction • What Sniffer is ? • IMEI • Design • Working • Advantages •
Conclusion • References
· 3 . Introduction • Each and everyday thousands of mobile get misplaced or lost, through
effective way for the blocking of the lost mobile to prevent unauthorized person from
making and receiving the calls has been done by the manufacturers of the mobile with the
help of International Mobile Equipment Identifier (IMEI) has been done but however
there has been no development or very little progress for the detection of the misplaced
mobile phone. • For the detection of lost mobile SNIFFER plays a vital role .The sniffer
device has to be designed precisely and size should be reduced for easy mobility for the
purpose of detection .
· 4 . What Sniffer is ? • The device include a mobile Base station that includes Sniffer Base
station, Unidirectional antenna , Tracking software. • The sniffer is a small base station
that includes transceiver section. • It should operate at a frequency which is much
different from the frequency of the current cell in which the operation of detection is
being carried out. • The directional antenna is an important device that is to be designed
and used as it plays a major role.
· 5. IMEI International Mobile Equipment Identity Unique number embedded in the
mobile phone. Used for blocking of call made by unauthorized person Numbering system
is a 15 digit unique code Identify-GSM/DCS/PCM Check EIR (Equipment ID Register)
· 6. Design The sniffer device has to be designed precisely and size should be reduced for
easy mobility for the purpose of detection. The device can be called as a mobile base
station that includes the following important components: • Sniffer base station •
Unidirectional antenna • Tracking software
· 7. Sniffer Base Station Small base station Include transceiver section Operated at
frequency (900mhz which is VHF range) OSCILLATOR circuit-for frequency range
Cooling is Important that has to be provided to the circuit Low power transmitter (help in
nature)
· 8. Unidirectional Antenna Act as a eyes for the sniffer Antenna is a device works at
specified frequency Transmitting & receiving data signal Transmit power Used to show
radiation pattern
· 9. Radio Pattern The Unidirectional Antenna Radio Pattern
· 10. Tracking software Feature: help to create database using RAM IMEA - embedded in
a chip RAM stores - IMEI no. Act as a database
· 11. Tracking software RAM Signal Information IMEI Number I/P Lost Mobile
2. · 12. Working of Sniffers The Working of sniffers is of two phases Before Sniffer
increases the frequencyq After Sniffer increases the frequencyq
· 13. Before Sniffer Increases the Frequency
· 14. Before Sniffer Increase the Frequency • In this a base station is used that works as a
middle point of mobile phone and MSC (Mobile Switching centre). • There is two way
communication between devices. Before the communication establishment, the
authentication of SIM card (Using IMEI) and handset (Using EIR) is done. • The EIR is
located at MSC and it contains the contains the IMEI of the lost mobile.
· 15. After Sniffer Increases the Frequency • The information from this communication is
fed to sniffer device and start to locate the mobile phone. • The connection between BTS
and device is lost due to EIR request. • The lost device search the device to get locked
and send the signal which is received by sniffer device and connection between them is
established. • Now IMEI of lost device is validated with stored IMEI and then connection
is established.
· 16. Contd.. • After that the location is traced. During this process, if another device try to
connect with sniffer then the connection is denied. • This can’t be done with the GPS
because the sniffer can only work with frequency only used with operators. • Now the
antennas are used to track different positions of the lost device.
· 17. After Sniffer Increases the Frequency
· 18. Advantages • This method is used for finding the lost mobiles effectively • Cost
effective • Low power consumption • Easy to design
· 19. Conclusion • “Sniffer for the detection of lost Mobile phones” paves a way by means
of which the lost mobile phones can be recovered. But the process of detection is yet to
be developed through the software. • There are certain boundary conditions or criteria
that have to be qualified for the identification of the lost mobile like the power of the
mobile should be good enough , the mobile phone should not be in the shadow region
etc., but however this method can be improved by using modern technologies and
devices.
· 20. References • Schiller , “Mobile Communication", Pearson Education 1 Edition, 7th
reprint-2003. • John D Kraus, “Electromagnetics", MH, • Jordan et al, “Electromagnetic
waves and radiation system” , Prentice Hall • www.gsmworld.com • http://ericsson.com •
http://iec.org
