presentation for italent 07

8/14/2019 Presentation for iTalent 07

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Transport Timetable

Information in MobilePhones

MUKUNDA.GPRADEEP.S

PRAVEEN.K

Under the Guidance ofMr.S.ARUNMOZHI

Asst Prof Dept of ECESMVEC


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Objective

To reduce the hassle totravelers due to delay intouch screenkiosk/electronic display.

To send requiredinformation to user mobilephones via Bluetooth and

an indigenously developedJ2ME application . To route data from server

via wireless nodes toBluetooth transceivers.


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Modules

End User Transmission UsingBluetooth

Wireless Routing

Database and Server


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End User Transmission UsingBluetooth

Bluetooth is found in 1 out of 4phones in market

Bluetooth works inAbsence of LOSThrough walls

Uses FHSS to avoid interference Uses Master Slave Piconet: 7 slaves are active255 in Park state.

The Bluetooth transceiver usesTDM to decide which slavemust communicate.


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ea ures o re essRouting

Connection less network. Selective flooding decreaseshandoff time.

Active star network used

because ofHigh Performance .Isolation.

CentralizationSimplicity


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e n o e

UniFi is a revolutionary single-chip Wi-Fi solution

Can route the data in the scatternet asit supports WLAN and Wi-Fi

Features of UniFi include: Single-chip RF, modem and MAC for WLAN. Dual RISC microcontrollers to reduce loading

on processor Native interfacing to embedded

processors Exceptional 'coexistence' with

other radios Ultra-low power consumption Optimized for coexistence with

Bluetooth and GSM/UMTS Package: 5.8 x 6.4mm.


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a a ase anServer

The server managessending the data

acknowledgements

identifying the nodes

Proposed to be coded in Microsoft.Net with a SQL database.

The server application acts as an

interface between the resourcesand the user.


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BD_ADRR1

CLK1

BD_ADRR1

CLK1

CHK

APPLN.

PKT1PKT1PKT1PKT1

ACK1ACK1

ACK1ACK1

PKT2PKT2PKT2

PKT2

BD_ADRR1

CLK1

BD_ADRR1

CLK1

INQ

ACKPKT2

Algorithm

BD_ADRR1

CLK1


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Algorithm A uniquely developed algorithm explained below is used for

implementing the project. The algorithm supports a handoff likescenario.

Scan for new Bluetooth device ( the Bluetooth Transceivers send outinquiry in all 32 bands of frequencies at an interval of 2.56ms

Once found store the clock and the BD_ADRR(the address of theBluetooth enabled device) in the database in the column of theaddress of corresponding Bluetooth transceiver

Now check whether the J2ME application required is running on themobile phone

If the application is not found ask the user if he wants to receive it.

If the user says yes transmit it else discard the BD_ADRR and clockfrom the database.

Now if the application is found start transmitting the data in packetsto the Bluetooth Transceiver and other Transceivers in the vicinity

using the Wi-Fi routing. Wait for the ACK(acknowledgement) for each packet from the mobile

phone.

Send the ACK of the last(latest) packet transmitted to the user viathe Wi-Fi routers to the central database which retransmits it to allother Bluetooth Transceivers in the vicinity and gets stored in theirbuffer local memory.

Now the Transceiver discards any packet that is present in its buffermemory because it has received its ACK(either from the mobile itself


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Algorithm Cont Still if the ACK is not received then the retransmit for N times

before assuming HANDOFF If handoff state has come then send the BD_ADRR and theclock of the mobile to all the Bluetooth Transceivers in thevicinity

The Transceivers search by giving inquiry signals incorresponding to the clock of the mobile phone in their area ofcoverage for a time TSearch

If the mobile is found then check in the local buffer whetherany packet that after the ACK of the new found mobile isstored

If such a packet is found then transmit the packet to themobile.

Report the change in the position of the mobile BD_ADRR tothe server which changes the location in the database.

During the handoff all other mobile phones which theTransceiver has been communicating are put to a PARK stateand TTimeout counter stopped.

Once the transmission of the data is complete the user isasked to exit and this message is sent to the server whichretransmits it to all other Transceivers in the vicinity so thatthey can discard any packets that is stored in their buffermemory.

The BD_ADRR is deleted from the central server


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Benefits Easy Information Access to UsersAccess of information from any part

of the transport terminalPhysically challenged users can also

access information.

Adaptability to other scenariosHospitalsStock Markets.Lectures

AdvertisingLarge shopping malls to direct

customers. Zero maintenanceNo Vandalism as no contact

with users


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u ureEnhancements

Existence of more than oneserver for data distributioncauses interference.Manual Identification between servers.Use of a second short-range

communication medium, such as anintegrated IR interface/RFIDtransponder, to facilitate theconnection setup.

Security measures againstBluejacking Bluebugging Bluesnarfing

Data on Demand by user.


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References

2. Ho Johan " Bluetooth Broadcasting" - Department of ComputerScience, Norwegian University 20 jan 2006.3. Busboom Alex, Herwono Ian, Schuba Marko, Zavagli Guido

"Unambigous Device Identification and Connection Setup UsingBluetooth- Ericsson Eurolab Deutschland GmbH, Ericsson Allee,Germany.

4. Desai UB, Kansal Aman Handoff Protocol for Bluetooth accessIEEE 2002- Department of Electrical Engg , Indian Institute of

Technology, Mumbai.5. http://www.plunkettresearch.com/IndustriesList/IndustryListWirelessCellularRFID

6. http://www.bluetooth.com/bluetooth/7. http://en.wikipedia.org/wiki/Bluetooth8. www.cris.org.in9. www.sco.com/company/success/docs/cris_ss_OS.pdf10. http://searchnetworking.techtarget.com11. http://www.csr.com/products/unifiport_over12. http://today.java.net/pub/a/today/2005/02/09/j2me113. http://developers.sun.com/mobility/reference/techart14. Tannenbaum.Andrew.S. -" Computer Networks - 4th edition"

Pearson education15. Wang.Hongfeng - "Overview of Bluetooth Technology" - Dept.

of Electrical Engineering State College, PA16.

16. Specification of Bluetooth System www.bluetooth.com.


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